Recent

New minimum 8/12/2026

AC Boo

124

František Bílek, TS Observatory, 7/29/2026

Seestar S50

. . .

New observation 8/12/2026

AC Boo

124

František Bílek, TS Observatory, 7/28/2026

Seestar S50

. . .

New minimum 4/27/2026

AC Boo

124

Giuseppe Maria Raffaele Nicosia, 4/26/2026

Seestar S50

. . .

New observation 4/27/2026

AC Boo

124

Giuseppe Maria Raffaele Nicosia, 4/26/2026

Seestar S50

. . .

New minimum 3/30/2026

AC Boo

124

František Bílek, TS Observatory, 3/27/2026

Seestar S50

. . .

New observation 3/30/2026

AC Boo

124

František Bílek, TS Observatory, 3/27/2026

Seestar S50

. . .

New minimum 2/26/2026

AC Boo

124

Sjoerd Dufoer, Brussels - Heliport, 2/26/2026

Vixen VMC200L - ZWO ASI 294MM

. . .

New observation 2/26/2026

AC Boo

124

Sjoerd Dufoer, Brussels - Heliport, 2/25/2026

Vixen VMC200L - ZWO ASI 294MM

. . .

New minimum 1/3/2026

AC Boo

124

Roman Ehrenberger, Crow Observatory Vranová, 6/13/2025

NWT 300/1200+MII G2-3200

. . .

New observation 1/3/2026

AC Boo

124

Roman Ehrenberger, Crow Observatory Vranová, 6/12/2025

NWT 300/1200+MII G2-3200

. . .

New minimum 1/3/2026

AC Boo

124

Roman Ehrenberger, Crow Observatory Vranová, 6/13/2025

NWT 300/1200+MII G2-3200

. . .

New observation 1/3/2026

AC Boo

124

Roman Ehrenberger, Crow Observatory Vranová, 6/12/2025

NWT 300/1200+MII G2-3200

. . .

New minimum 1/3/2026

AC Boo

124

Roman Ehrenberger, Crow Observatory Vranová, 6/13/2025

NWT 300/1200+MII G2-3200

. . .

New observation 1/3/2026

AC Boo

124

Roman Ehrenberger, Crow Observatory Vranová, 6/12/2025

NWT 300/1200+MII G2-3200

. . .

New minimum 5/1/2025

AC Boo

124

Milan Uhlar, JIRNY, 4/30/2025

QHY294, LNS200, OAT

. . .

New observation 5/1/2025

AC Boo

124

Milan Uhlar, JIRNY, 4/30/2025

QHY294, LNS200, OAT

. . .

New minimum 4/18/2025

AC Boo

124

Roman Ehrenberger, Crow Observatory Vranová, 4/4/2025

NWT 300/1200+MII G2-3200

. . .

New observation 4/18/2025

AC Boo

124

Roman Ehrenberger, Crow Observatory Vranová, 4/4/2025

NWT 300/1200+MII G2-3200

. . .

New minimum 4/18/2025

AC Boo

124

Roman Ehrenberger, Crow Observatory Vranová, 4/4/2025

NWT 300/1200+MII G2-3200

. . .

New observation 4/18/2025

AC Boo

124

Roman Ehrenberger, Crow Observatory Vranová, 4/4/2025

NWT 300/1200+MII G2-3200

. . .

New minimum 4/18/2025

AC Boo

124

Roman Ehrenberger, Crow Observatory Vranová, 4/4/2025

NWT 300/1200+MII G2-3200

. . .

New observation 4/18/2025

AC Boo

124

Roman Ehrenberger, Crow Observatory Vranová, 4/4/2025

NWT 300/1200+MII G2-3200

. . .

New minimum 3/18/2025

AC Boo

124

Milan Uhlar, JIRNY, 3/18/2025

QHY294, LNS200, OAT

. . .

New minimum 3/18/2025

AC Boo

124

Milan Uhlar, JIRNY, 3/17/2025

QHY294, LNS200, OAT

. . .

New observation 3/18/2025

AC Boo

124

Milan Uhlar, JIRNY, 3/17/2025

QHY294, LNS200, OAT

. . .

New minimum 5/3/2024

QHY294, LNS200, OAT
filter: clear
temp: -10C
binning: 2x2
exp_time: 90sec.
equip.: QHY294
lens: 200/8

----- EBFit result: -----
Tmin = 2460433.44586
Error (1 sigma): +0.00021/-0.00019 (Bootstrapping), +0.00004/-0.00004 (Prayer bead), +0.00014/-0.00014 (LSM)
Error (95% CI): +0.00041/-0.00039 (Bootstrapping), +0.00007/-0.00009 (Prayer bead)
LSM: chi^2 = 122.7, n_freedom = 48

. . .

New observation 5/3/2024

AC Boo

124

Milan Uhlar, JIRNY

QHY294, LNS200, OAT

QHY294, LNS200, OAT
filter: clear
temp: -10C
binning: 2x2
exp_time: 90sec.
equip.: QHY294
lens: 200/8

. . .

New minimum 1/11/2024

AC Boo

124

Sjoerd Dufoer, Brussels - Heliport

Vixen 20cm VMC200L

Vixen 20cm VMC200L

----- EBFit result: -----
Tmin = 2460319.60642
Error (1 sigma): +0.00008/-0.00008 (Bootstrapping), +0.00002/-0.00002 (Prayer bead), +0.00004/-0.00004 (LSM)
Error (95% CI): +0.00015/-0.00017 (Bootstrapping), +0.00004/-0.00004 (Prayer bead)
LSM: chi^2 = 736.1, n_freedom = 232

. . .

New observation 1/10/2024

AC Boo

124

Matúš Kamenec, Prešov

SkyWatcher REF 102/500

. . .

New minimum 8/15/2023

AC Boo

124

Matúš Kamenec, Prešov

SkyWatcher REF 102/500

SkyWatcher REF 102/500
#Observatory>Presov
#Observer>Matus Kamenec
#Telescope>SkyWatcher 102/500 / EQ3-2
#Instrument>Canon EOS 500D
#Filter>Clear
#Exposure>30s ISO 800
#Target>AC Boo
#Position>
#MainComp>
#Source>
#Magnitude system>
#Time system>JD geocentric
#Reduction>Muniwin
#Comment>

----- EBFit result: -----
Tmin = 2460171.39047
Error (1 sigma): +0.00068/-0.00076 (Bootstrapping), +0.00028/-0.00019 (Prayer bead), +0.00021/-0.00021 (LSM)
Error (95% CI): +0.00283/-0.00158 (Bootstrapping), +0.00476/-0.00081 (Prayer bead)
LSM: chi^2 = 449.7, n_freedom = 22

. . .

New observation 8/15/2023

AC Boo

124

Matúš Kamenec, Prešov

SkyWatcher REF 102/500

SkyWatcher REF 102/500
#Observatory>Presov
#Observer>Matus Kamenec
#Telescope>SkyWatcher 102/500 / EQ3-2
#Instrument>Canon EOS 500D
#Filter>Clear
#Exposure>30s ISO 800
#Target>AC Boo
#Position>
#MainComp>
#Source>
#Magnitude system>
#Time system>JD geocentric
#Reduction>Muniwin
#Comment>

----- EBFit result: -----
TminGJD = 2460171.39027
Error (1 sigma): +0.00043/-0.00076 (Bootstrapping), +0.00050/-0.00033 (Prayer bead), +0.00018/-0.00018 (LSM)
Error (95% CI): +0.00117/-0.00138 (Bootstrapping), +0.00417/-0.00073 (Prayer bead)
LSM: chi^2 = 274.1, n_freedom = 17
secondary minimum

. . .

New observation 5/11/2023

AC Boo

124

Matúš Kamenec, Kolonica

SkyWatcher Newton 200/1200

SkyWatcher Newton 200/1200
#Observatory>Kolonica
#Observer>Matus Kamenec
#Telescope>SkyWatcher 200/1200 EQ6
#Instrument>Canon EOS 500D
#Filter>Clear
#Exposure>30s ISO 800
#Target>AC Boo
#Position>
#MainComp>
#Source>
#Magnitude system>
#Time system>JD geocentric
#Reduction>Muniwin
#Comment>

----- EBFit result: -----
TminGJD = 2460070.41933
Error (1 sigma): +0.00008/-0.00010 (Bootstrapping), +0.00011/-0.00016 (Prayer bead), +0.00006/-0.00006 (LSM)
Error (95% CI): +0.00017/-0.00018 (Bootstrapping), +0.00017/-0.00022 (Prayer bead)
LSM: chi^2 = 168.2, n_freedom = 68

. . .

New minimum 4/16/2023

AC Boo

124

Milan Uhlar, JIRNY

Canon 7D MarkII, LNS300, OAT

Canon 7D MarkII, LNS300, OAT
ISO1600, RGGB binning2x2, 110sec, F8

----- EBFit result: -----
Tmin = 2460045.39435
Error (1 sigma): +0.00037/-0.00044 (Bootstrapping), +0.00046/-0.00049 (Prayer bead), +0.00049/-0.00049 (LSM)
Error (95% CI): +0.00074/-0.00090 (Bootstrapping), +0.00058/-0.00066 (Prayer bead)
LSM: chi^2 = 51.8, n_freedom = 49

. . .

New observation 4/11/2023

AC Boo

124

Milan Uhlar, JIRNY

Canon 7D MarkII, LNS300, OAT

Canon 7D MarkII, LNS300, OAT
ISO1600, RGGB binning2x2, 110sec, F8

. . .

New observation 1/29/2023

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

M20 RL 200/2000

M20 RL 200/2000
#Observatory>Kolonica
#Observer>DPV
#Telescope>M20
#Instrument>MII G2-1600
#Filter/Exposure>V 60s;I 60s
#Target>ACBoo
#Position>14:56:28.25;+46:21:42.7
#MainComp>14:56:07.84;+46:21:26.2;B=11.724;V=11.126;BV=0.598;Rc=10.822;Ic=10.535
#Source>APASS
#Magnitude system>ABS
#Time system>JD geocentric
#Reduction>Ensemble photometry with CoLiTecVS
#Comment>

. . .

New observation 9/8/2022

AC Boo

124

Matúš Kamenec, Prešov

SkyWatcher Newton 102/500

SkyWatcher Newton 102/500
----- EBFit result: -----
TminGJD = 2459782.46951
Error (1 sigma): +0.00025/-0.00027 (Bootstrapping), +0.00032/-0.00028 (Prayer bead), +0.00010/-0.00010 (LSM)
Error (95% CI): +0.00052/-0.00052 (Bootstrapping), +0.00045/-0.00046 (Prayer bead)
LSM: chi^2 = 597.5, n_freedom = 96

. . .

New observation 7/23/2022

AC Boo

124

Matúš Kamenec, Prešov

SkyWatcher Newton 102/500

SkyWatcher Newton 102/500
#Observer>Matus Kamenec
#Telescope>SkyWatcher 102/500 / EQ3-2 GoTo
#Instrument>Canon EOS 500D
#Filter>Clear
#Exposure>30s ISO 800
#Target>AC Boo
#Position>
#MainComp>
#Source>
#Magnitude system>
#Time system>JD geocentric
#Reduction>
#Comment>CCDCiel

----- EBFit result: -----
TminGJD = 2459783.52510
Error (1 sigma): +0.00057/-0.00056 (Bootstrapping), +0.00032/-0.00034 (Prayer bead), +0.00049/-0.00049 (LSM)
Error (95% CI): +0.00116/-0.00106 (Bootstrapping), +0.00066/-0.00078 (Prayer bead)
LSM: chi^2 = 168.9, n_freedom = 76

. . .

New observation 7/22/2022

AC Boo

124

Matúš Kamenec, Prešov

SkyWatcher Newton 102/500

SkyWatcher Newton 102/500
#Observer>Matus Kamenec
#Telescope>SkyWatcher 102/500 / EQ3-2 GoTo
#Instrument>Canon EOS 500D
#Filter>Clear
#Exposure>30s ISO 800
#Target>AC Boo
#Position>
#MainComp>
#Source>
#Magnitude system>
#Time system>JD geocentric
#Reduction>
#Comment>CCDCiel

----- EBFit result: -----
TminGJD = 2459782.46946
Error (1 sigma): +0.00028/-0.00024 (Bootstrapping), +0.00025/-0.00020 (Prayer bead), +0.00013/-0.00013 (LSM)
Error (95% CI): +0.00049/-0.00049 (Bootstrapping), +0.00035/-0.00032 (Prayer bead)
LSM: chi^2 = 382.4, n_freedom = 96

. . .

New minimum 2/14/2022

AC Boo

124

Sjoerd Dufoer, Brussels - Heliport

Vixen 20cm VMC200L

Vixen 20cm VMC200L

----- EBFit result: -----
Tmin = 2459622.45197
Error (1 sigma): +0.00015/-0.00014 (Bootstrapping), +0.00017/-0.00014 (Prayer bead), +0.00010/-0.00010 (LSM)
Error (95% CI): +0.00031/-0.00031 (Bootstrapping), +0.00027/-0.00023 (Prayer bead)
LSM: chi^2 = 250.0, n_freedom = 114

. . .

New minimum 10/29/2021

AC Boo

124

Sjoerd Dufoer, Brussels - Heliport

Vixen 20cm VMC200L

Vixen 20cm VMC200L

----- EBFit result: -----
Tmin = 2459516.71697
Error (1 sigma): +0.00090/-0.00075 (Bootstrapping), +0.00141/-0.00078 (Prayer bead), +0.00085/-0.00085 (LSM)
Error (95% CI): +0.00639/-0.00127 (Bootstrapping), +0.00435/-0.00131 (Prayer bead)
LSM: chi^2 = 97.6, n_freedom = 47

. . .

New observation 6/1/2021

AC Boo

124

Ehrenberger R., Crow-Observatory Vranová

NWT 300/1200+MII G2-3200

. . .

New observation 6/1/2021

AC Boo

124

Ehrenberger R., Crow-Observatory Vranová

NWT 300/1200+MII G2-3200

. . .

New observation 6/1/2021

AC Boo

124

Ehrenberger R., Crow-Observatory Vranová

NWT 300/1200+MII G2-3200

. . .

New minimum 6/1/2021

AC Boo

124

Roman Ehrenberger, Crow-Observatory Vranová

NWT 300/1200+MII G2-3200

NWT 300/1200+MII G2-3200

----- EBFit result: -----
Tmin = 2459338.37712
Error (1 sigma): +0.00013/-0.00013 (Bootstrapping), +0.00003/-0.00004 (Prayer bead), +0.00005/-0.00005 (LSM)
Error (95% CI): +0.00027/-0.00026 (Bootstrapping), +0.00006/-0.00007 (Prayer bead)
LSM: chi^2 = 693.7, n_freedom = 76

. . .

New minimum 6/1/2021

AC Boo

124

Roman Ehrenberger, Crow-Observatory Vranová

NWT 300/1200+MII G2-3200

NWT 300/1200+MII G2-3200

----- EBFit result: -----
Tmin = 2459338.37741
Error (1 sigma): +0.00015/-0.00014 (Bootstrapping), +0.00007/-0.00006 (Prayer bead), +0.00004/-0.00004 (LSM)
Error (95% CI): +0.00035/-0.00026 (Bootstrapping), +0.00008/-0.00016 (Prayer bead)
LSM: chi^2 = 1011.4, n_freedom = 70

. . .

New minimum 6/1/2021

AC Boo

124

Roman Ehrenberger, Crow-Observatory Vranová

NWT 300/1200+MII G2-3200

NWT 300/1200+MII G2-3200

----- EBFit result: -----
Tmin = 2459338.37747
Error (1 sigma): +0.00014/-0.00013 (Bootstrapping), +0.00007/-0.00009 (Prayer bead), +0.00005/-0.00005 (LSM)
Error (95% CI): +0.00031/-0.00026 (Bootstrapping), +0.00012/-0.00011 (Prayer bead)
LSM: chi^2 = 810.3, n_freedom = 75

. . .

New minimum 3/22/2021

AC Boo

124

Filip Walter, Štefánik Observatory, Prague, Czech Republic

Skywatcher REF 102/600 + DSLR Canon 1000D

Skywatcher REF 102/600 + DSLR Canon 1000D
V2_C9_90.800.C.2x2.3

----- EBFit result: -----
Tmin = 2458927.59381
Error (1 sigma): +0.00020/-0.00023 (Bootstrapping), +0.00007/-0.00007 (Prayer bead), +0.00016/-0.00016 (LSM)
Error (95% CI): +0.00041/-0.00048 (Bootstrapping), +0.00018/-0.00016 (Prayer bead)
LSM: chi^2 = 38.0, n_freedom = 19

. . .

New observation 3/22/2021

AC Boo

124

Filip Walter, Štefánik Observatory, Prague, Czech Republic

Skywatcher REF 102/600 + DSLR Canon 1000D

Skywatcher REF 102/600 + DSLR Canon 1000D
V2_C9_90.800.C.2x2.3

. . .

New minimum 4/20/2020

AC Boo

124

Nosáľ P., Vígľaš

NWT 150/600 + Canon 20D + MPCC mk.III

NWT 150/600 + Canon 20D + MPCC mk.III

----- EBFit result: -----
Tmin = 2458951.38458
Error (1 sigma): +0.00018/-0.00020 (Bootstrapping), +0.00020/-0.00015 (Prayer bead), +0.00006/-0.00006 (LSM)
Error (95% CI): +0.00036/-0.00038 (Bootstrapping), +0.00023/-0.00021 (Prayer bead)
LSM: chi^2 = 472.4, n_freedom = 56

. . .

New observation 4/5/2020

AC Boo

124

Ehrenberger R., Crow-Observatory Vranová

NWT 150/600+MII G2-8300

. . .

New minimum 4/5/2020

AC Boo

124

Roman Ehrenberger, Crow-Observatory Vranová

NWT 150/600 + MII G2-8300

NWT 150/600 + MII G2-8300
----- EBFit result: -----
Tmin = 2458944.51115
Error (1 sigma): +0.00009/-0.00010 (Bootstrapping), +0.00009/-0.00008 (Prayer bead), +0.00002/-0.00002 (LSM)
Error (95% CI): +0.00018/-0.00019 (Bootstrapping), +0.00013/-0.00011 (Prayer bead)
LSM: chi^2 = 9386.6, n_freedom = 285

. . .

New minimum 4/5/2020

AC Boo

124

Roman Ehrenberger, Crow-Observatory Vranová

NWT 150/600 + MII G2-8300

NWT 150/600 + MII G2-8300
----- EBFit result: -----
Tmin = 2458944.33668
Error (1 sigma): +0.00008/-0.00007 (Bootstrapping), +0.00003/-0.00003 (Prayer bead), +0.00003/-0.00003 (LSM)
Error (95% CI): +0.00015/-0.00015 (Bootstrapping), +0.00004/-0.00005 (Prayer bead)
LSM: chi^2 = 1713.2, n_freedom = 205

. . .

New minimum 3/31/2020

AC Boo

124

Dvořák P., Oslavany

Celestron NexStar Evolution 235 mm, f/10, CMOS C2-12000AC

. . .

New observation 3/31/2020

AC Boo

124

Dvořák P., Oslavany

Celestron NexStar Evolution 235 mm, f/10, CMOS C2-12000AC

. . .

New observation 3/27/2020

AC Boo

124

Filip Walter, Štefánik Observatory, Prague, Czech Republic

Skywatcher REF 102/600 + DSLR Canon 1000D

Skywatcher REF 102/600 + DSLR Canon 1000D
V2C9_90.800_C

. . .

New observation 6/5/2019

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

Celestron 14

Celestron 14
#Observatory>Kolonica
#Observer>Medulka
#Telescope>C14
#Instrument>MII G2-1600
#Filter>I
#Exposure>60s
#Target>ACBoo
#Position>14:56:28.25;+46:21:42.7
#MainComp>14:56:07.84;+46:21:26.2;B=11.724;V=11.126;BV=0.598;Rc=10.822;Ic=10.535
#Source>APASS
#Magnitude system>ABS
#Time system>JD geocentric
#Reduction>Ensemble photometry with CoLiTecVS
#Comment>

. . .

New observation 6/5/2019

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

Celestron 14

Celestron 14
#Observatory>Kolonica
#Observer>Medulka
#Telescope>C14
#Instrument>MII G2-1600
#Filter>V
#Exposure>60s
#Target>ACBoo
#Position>14:56:28.25;+46:21:42.7
#MainComp>14:56:07.84;+46:21:26.2;B=11.724;V=11.126;BV=0.598;Rc=10.822;Ic=10.535
#Source>APASS
#Magnitude system>ABS
#Time system>JD geocentric
#Reduction>Ensemble photometry with CoLiTecVS
#Comment>

. . .

New minimum 5/1/2019

AC Boo

124

Roman Ehrenberger, Crow-Observatory Vranová

NWT 150/600 + MII G2-8300

NWT 150/600 + MII G2-8300
----- EBFit result: -----
Tmin = 2458604.39563
Error (1 sigma): +0.00009/-0.00007 (Bootstrapping), +0.00013/-0.00011 (Prayer bead), +0.00004/-0.00004 (LSM)
Error (95% CI): +0.00017/-0.00016 (Bootstrapping), +0.00017/-0.00021 (Prayer bead)
LSM: chi^2 = 588.1, n_freedom = 112

. . .

New observation 5/1/2019

AC Boo

124

Ehrenberger R., Crow-Observatory Vranová

NWT 150/600+MII G2-8300

. . .

New minimum 4/19/2019

AC Boo

124

Pokorný P., Česká Lípa

Sonnar LNS 45/180 + Canon 600D

Sonnar LNS 45/180 + Canon 600D

----- EBFit result: -----
Tmin = 2458590.47655
Error (1 sigma): +0.00082/-0.00074 (Bootstrapping), +0.00040/-0.00037 (Prayer bead), +0.00076/-0.00076 (LSM)
Error (95% CI): +0.00157/-0.00149 (Bootstrapping), +0.00059/-0.00080 (Prayer bead)
LSM: chi^2 = 248.2, n_freedom = 238

. . .

New observation 4/11/2019

AC Boo

124

Filip Walter, Štefánik Observatory, Prague, Czech Republic

Skywatcher REF 102/600 + Canon 1000D

Skywatcher REF 102/600 + Canon 1000D
Jasno, v druhé půli přechody oblačnosti.

V2_C9_60.200

. . .

New observation 4/11/2019

AC Boo

124

Filip Walter, Štefánik Observatory, Prague, Czech Republic

Skywatcher REF 102/600 + Canon 1000D

. . .

New minimum 4/11/2019

AC Boo

124

Filip Walter, Štefánik Observatory, Prague, Czech Republic

Skywatcher REF 102/600 + Canon 1000D

Skywatcher REF 102/600 + Canon 1000D
Jasno, po přeložení ztráta pole.

V2_C9_90.800

----- EBFit result: -----
Tmin = 2458578.49160
Error (1 sigma): +0.00021/-0.00021 (Bootstrapping), +0.00021/-0.00012 (Prayer bead), +0.00010/-0.00010 (LSM)
Error (95% CI): +0.00045/-0.00045 (Bootstrapping), +0.00026/-0.00023 (Prayer bead)
LSM: chi^2 = 225.7, n_freedom = 45

. . .

New observation 4/11/2019

AC Boo

124

Filip Walter, Štefánik Observatory, Prague, Czech Republic

Skywatcher REF 102/600 + Canon 1000D

Skywatcher REF 102/600 + Canon 1000D
Jasno, po přeložení ztráta pole.

V2_C9_90.0800

. . .

New minimum 9/19/2018

AC Boo

124

Matúš Kamenec, Prešov

REF SkyWatcher 102/500 Canon 500D

REF SkyWatcher 102/500 Canon 500D
Observatory>Presov
#Observer>Matus Kamenec
#Telescope>SkyWatcher 102/500 / EQ3-2 GoTo
#Instrument>Canon EOS 500D
#Filter>Clear
#Exposure>30s ISO 1600
#Target>AC Boo
#Position>
#MainComp>
#Source>
#Magnitude system>
#Time system>JD geocentric
#Reduction>Ensemble photometry with MuniWin and MCV
#Comment>

----- EBFit result: -----
Tmin = 2458379.35945
Error (1 sigma): +0.00083/-0.00042 (Bootstrapping), +0.00080/-0.00102 (Prayer bead), +0.00006/-0.00006 (LSM)
Error (95% CI): +0.00108/-0.00118 (Bootstrapping), +0.00183/-0.00145 (Prayer bead)
LSM: chi^2 = 1697.9, n_freedom = 63

. . .

New observation 9/19/2018

AC Boo

124

Matúš Kamenec, Prešov

REF SkyWatcher 102/500 Canon 500D

REF SkyWatcher 102/500 Canon 500D
Observatory>Presov
#Observer>Matus Kamenec
#Telescope>SkyWatcher 102/500 / EQ3-2 GoTo
#Instrument>Canon EOS 500D
#Filter>Clear
#Exposure>30s ISO 1600
#Target>AC Boo
#Position>
#MainComp>
#Source>
#Magnitude system>
#Time system>JD geocentric
#Reduction>Ensemble photometry with MuniWin and MCV
#Comment>

----- EBFit result: -----
TminGJD = 2458379.35943
Error (1 sigma): +0.00080/-0.00043 (Bootstrapping), +0.00079/-0.00095 (Prayer bead), +0.00006/-0.00006 (LSM)
Error (95% CI): +0.00106/-0.00133 (Bootstrapping), +0.00131/-0.00148 (Prayer bead)
LSM: chi^2 = 1709.6, n_freedom = 67

. . .

New observation 5/25/2018

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

Ziga CDK20

Ziga CDK20
#Telescope>Ziga
#CCD>MII G4-16000
#Observer>DPV
#Filter>V
#Exposure>20s
#Target>AC Boo
#Position>14:56:28.34;+46:21:44.1
#MainComp>14:56:07.84;+46:21:26.2;B=11.724,V=11.126,R=10.822,I=10.535
#Source>APASS
#Time system>JD geocentric
#Magnitude system>V-C
#Reduction process>Images calibrated with CoLiTecVS, Ensemble photometry with Muniwin and MCV
#Note>fullframe

. . .

New observation 5/25/2018

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

Ziga CDK20

Ziga CDK20
#Telescope>Ziga
#CCD>MII G4-16000
#Observer>DPV
#Filter>I
#Exposure>30s
#Target>AC Boo
#Position>14:56:28.34;+46:21:44.1
#MainComp>14:56:07.84;+46:21:26.2;B=11.724,V=11.126,R=10.822,I=10.535
#Source>APASS
#Time system>JD geocentric
#Magnitude system>V-C
#Reduction process>Images calibrated with CoLiTecVS, Ensemble photometry with Muniwin and MCV
#Note>fullframe

. . .

New minimum 10/9/2017

AC Boo

124

Bragagnolo U., Gruppo Astrofili Salese S.M di Sala (Venezia ) ITALIA

Sky-Watcher REF 100/900 + QHY9

Sky-Watcher REF 100/900 + QHY9
----- EBFit result: -----
Tmin = 2457989.36583
Error (1 sigma): +0.00015/-0.00017 (Bootstrapping), +0.00018/-0.00019 (Prayer bead), +0.00004/-0.00004 (LSM)
Error (95% CI): +0.00031/-0.00035 (Bootstrapping), +0.00021/-0.00032 (Prayer bead)
LSM: chi^2 = 3542.2, n_freedom = 184

. . .

New observation 4/18/2017

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

Ziga CDK20

Ziga CDK20
CCD+V; exp 20s; Ziga binning 2x2 fullframe 1024x1024; secondary minimum
Ziga 508/3454 + MII G4-16000 + DPV
Images calibrated with OLDAS; Ensemble photometry with C-Munipack and MCV, MainComp = HD132255, V=9.39, B-V=0.33 (TYCHO-2)
JD geocentric, V-C magnitudes

----- EBFit result: -----
TminGJD = 2457854.37213
Error (1 sigma): +0.00017/-0.00017 (Bootstrapping), +0.00003/-0.00003 (Prayer bead), +0.00004/-0.00004 (LSM)
Error (95% CI): +0.00037/-0.00032 (Bootstrapping), +0.00008/-0.00006 (Prayer bead)
LSM: chi^2 = 460.3, n_freedom = 28

. . .

New observation 4/18/2017

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

Ziga CDK20

Ziga CDK20
CCD+R; exp 20s; Ziga binning 2x2 fullframe 1024x1024; secondary minimum
Ziga 508/3454 + MII G4-16000 + DPV
Images calibrated with OLDAS; Ensemble photometry with C-Munipack and MCV, MainComp = HD132255, V=9.39, B-V=0.33 (TYCHO-2)
JD geocentric, V-C magnitudes

----- EBFit result: -----
TminGJD = 2457854.37214
Error (1 sigma): +0.00019/-0.00021 (Bootstrapping), +0.00005/-0.00006 (Prayer bead), +0.00003/-0.00003 (LSM)
Error (95% CI): +0.00042/-0.00039 (Bootstrapping), +0.00006/-0.00011 (Prayer bead)
LSM: chi^2 = 860.8, n_freedom = 30

. . .

New observation 4/18/2017

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

Ziga CDK20

Ziga CDK20
CCD+I; exp 30s; Ziga binning 2x2 fullframe 1024x1024; secondary minimum
Ziga 508/3454 + MII G4-16000 + DPV
Images calibrated with OLDAS; Ensemble photometry with C-Munipack and MCV, MainComp = HD132255, V=9.39, B-V=0.33 (TYCHO-2)
JD geocentric, V-C magnitudes

----- EBFit result: -----
TminGJD = 2457854.37229
Error (1 sigma): +0.00017/-0.00017 (Bootstrapping), +0.00004/-0.00007 (Prayer bead), +0.00004/-0.00004 (LSM)
Error (95% CI): +0.00036/-0.00035 (Bootstrapping), +0.00005/-0.00010 (Prayer bead)
LSM: chi^2 = 505.8, n_freedom = 25

. . .

New observation 4/18/2017

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

Ziga CDK20

. . .

New observation 4/11/2017

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

Ziga CDK20

. . .

New observation 4/11/2017

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

Ziga CDK20

. . .

New observation 4/11/2017

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

Ziga CDK20

. . .

New observation 4/11/2017

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

Ziga CDK20

. . .

New observation 4/6/2017

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

Ziga CDK20

Ziga CDK20
CCD+V; exp 20s; Ziga binning 2x2 fullframe 1024x1024
Ziga 508/3454 + MII G4-16000 + DPV
Images calibrated with OLDAS; Ensemble photometry with C-Munipack and MCV, MainComp = HD132255, V=9.39, B-V=0.33 (TYCHO-2)
JD geocentric, V-C magnitudes

----- EBFit result: -----
TminGJD = 2457846.44366
Error (1 sigma): +0.00017/-0.00015 (Bootstrapping), +0.00006/-0.00005 (Prayer bead), +0.00003/-0.00003 (LSM)
Error (95% CI): +0.00039/-0.00029 (Bootstrapping), +0.00007/-0.00011 (Prayer bead)
LSM: chi^2 = 673.3, n_freedom = 29

. . .

New observation 4/6/2017

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

Ziga CDK20

Ziga CDK20
CCD+R; exp 20s; Ziga binning 2x2 fullframe 1024x1024
Ziga 508/3454 + MII G4-16000 + DPV
Images calibrated with OLDAS; Ensemble photometry with C-Munipack and MCV, MainComp = HD132255, V=9.39, B-V=0.33 (TYCHO-2)
JD geocentric, V-C magnitudes

----- EBFit result: -----
TminGJD = 2457846.44359
Error (1 sigma): +0.00016/-0.00014 (Bootstrapping), +0.00002/-0.00003 (Prayer bead), +0.00003/-0.00003 (LSM)
Error (95% CI): +0.00034/-0.00026 (Bootstrapping), +0.00005/-0.00005 (Prayer bead)
LSM: chi^2 = 708.8, n_freedom = 30

. . .

New observation 4/6/2017

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

Ziga CDK20

Ziga CDK20
CCD+I; exp 30s; Ziga binning 2x2 fullframe 1024x1024
Ziga 508/3454 + MII G4-16000 + DPV
Images calibrated with OLDAS; Ensemble photometry with C-Munipack and MCV, MainComp = HD132255, V=9.39, B-V=0.33 (TYCHO-2)
JD geocentric, V-C magnitudes

----- EBFit result: -----
TminGJD = 2457846.44336
Error (1 sigma): +0.00014/-0.00015 (Bootstrapping), +0.00003/-0.00003 (Prayer bead), +0.00003/-0.00003 (LSM)
Error (95% CI): +0.00033/-0.00026 (Bootstrapping), +0.00004/-0.00004 (Prayer bead)
LSM: chi^2 = 777.6, n_freedom = 35

. . .

New observation 4/6/2017

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

Ziga CDK20

Ziga CDK20
CCD+B; exp 60s; Ziga binning 2x2 fullframe 1024x1024
Ziga 508/3454 + MII G4-16000 + DPV
Images calibrated with OLDAS; Ensemble photometry with C-Munipack and MCV, MainComp = HD132255, V=9.39, B-V=0.33 (TYCHO-2)
JD geocentric, V-C magnitudes

----- EBFit result: -----
TminGJD = 2457846.44390
Error (1 sigma): +0.00014/-0.00015 (Bootstrapping), +0.00008/-0.00007 (Prayer bead), +0.00003/-0.00003 (LSM)
Error (95% CI): +0.00032/-0.00026 (Bootstrapping), +0.00011/-0.00009 (Prayer bead)
LSM: chi^2 = 709.9, n_freedom = 26

. . .

New minimum 3/29/2017

AC Boo

124

Vrašťák M, LSO, Slovakia

NWT 280/1500+MII G2-1600, pointer 80/400+G1-0301

NWT 280/1500+MII G2-1600, pointer 80/400+G1-0301

----- EBFit result: -----
Tmin = 2457841.50939
Error (1 sigma): +0.00016/-0.00015 (Bootstrapping), +0.00003/-0.00002 (Prayer bead), +0.00005/-0.00005 (LSM)
Error (95% CI): +0.00032/-0.00029 (Bootstrapping), +0.00005/-0.00005 (Prayer bead)
LSM: chi^2 = 325.0, n_freedom = 33

. . .

New minimum 3/29/2017

AC Boo

124

Vrašťák M, LSO, Slovakia

NWT 280/1500+MII G2-1600, pointer 80/400+G1-0301

NWT 280/1500+MII G2-1600, pointer 80/400+G1-0301

----- EBFit result: -----
Tmin = 2457841.50917
Error (1 sigma): +0.00018/-0.00017 (Bootstrapping), +0.00004/-0.00003 (Prayer bead), +0.00006/-0.00006 (LSM)
Error (95% CI): +0.00037/-0.00031 (Bootstrapping), +0.00007/-0.00004 (Prayer bead)
LSM: chi^2 = 270.3, n_freedom = 32

. . .

New minimum 3/29/2017

AC Boo

124

Vrašťák M, LSO, Slovakia

NWT 280/1500+MII G2-1600, pointer 80/400+G1-0301

NWT 280/1500+MII G2-1600, pointer 80/400+G1-0301

----- EBFit result: -----
Tmin = 2457841.50898
Error (1 sigma): +0.00013/-0.00012 (Bootstrapping), +0.00004/-0.00004 (Prayer bead), +0.00007/-0.00007 (LSM)
Error (95% CI): +0.00030/-0.00026 (Bootstrapping), +0.00007/-0.00005 (Prayer bead)
LSM: chi^2 = 135.5, n_freedom = 32

. . .

New minimum 3/29/2017

AC Boo

124

Vrašťák M, LSO, Slovakia

NWT 280/1500+MII G2-1600, pointer 80/400+G1-0301

NWT 280/1500+MII G2-1600, pointer 80/400+G1-0301

----- EBFit result: -----
Tmin = 2457841.50879
Error (1 sigma): +0.00016/-0.00014 (Bootstrapping), +0.00002/-0.00003 (Prayer bead), +0.00009/-0.00009 (LSM)
Error (95% CI): +0.00032/-0.00029 (Bootstrapping), +0.00004/-0.00005 (Prayer bead)
LSM: chi^2 = 100.8, n_freedom = 35

. . .

New observation 2/18/2017

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

Ziga CDK20

Ziga CDK20
CCD+V; exp 20s; Ziga binning 2x2 fullframe 1024x1024; secondary minimum
Ziga 508/3454 + MII G4-16000 + DPV
Ensamble photometry with C-Munipack and MCV, MainComp = HD132255, V=9.39, B-V=0.33 (TYCHO-2)
JD geocentric, V-C magnitudes

----- EBFit result: -----
TminGJD = 2457796.57087
Error (1 sigma): +0.00011/-0.00011 (Bootstrapping), +0.00003/-0.00004 (Prayer bead), +0.00003/-0.00003 (LSM)
Error (95% CI): +0.00021/-0.00020 (Bootstrapping), +0.00005/-0.00007 (Prayer bead)
LSM: chi^2 = 996.6, n_freedom = 48

. . .

New observation 2/18/2017

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

Ziga CDK20

Ziga CDK20
CCD+R; exp 20s; Ziga binning 2x2 fullframe 1024x1024; secondary minimum
Ziga 508/3454 + MII G4-16000 + DPV
Ensamble photometry with C-Munipack and MCV, MainComp = HD132255, V=9.39, B-V=0.33 (TYCHO-2)
JD geocentric, V-C magnitudes

----- EBFit result: -----
TminGJD = 2457796.57091
Error (1 sigma): +0.00012/-0.00012 (Bootstrapping), +0.00009/-0.00008 (Prayer bead), +0.00003/-0.00003 (LSM)
Error (95% CI): +0.00024/-0.00024 (Bootstrapping), +0.00013/-0.00016 (Prayer bead)
LSM: chi^2 = 1115.2, n_freedom = 42

. . .

New observation 2/18/2017

AC Boo

124

Pavol A. Dubovsky, AO Kolonica

Ziga CDK20

Ziga CDK20
CCD+I; exp 30s; Ziga binning 2x2 fullframe 1024x1024; secondary minimum
Ziga 508/3454 + MII G4-16000 + DPV
Ensamble photometry with C-Munipack and MCV, MainComp = HD132255, V=9.39, B-V=0.33 (TYCHO-2)
JD geocentric, V-C magnitudes
----- EBFit result: -----
TminGJD = 2457796.57092
Error (1 sigma): +0.00010/-0.00009 (Bootstrapping), +0.00003/-0.00003 (Prayer bead), +0.00003/-0.00003 (LSM)
Error (95% CI): +0.00023/-0.00021 (Bootstrapping), +0.00004/-0.00005 (Prayer bead)
LSM: chi^2 = 669.4, n_freedom = 46

. . .

New minimum 11/3/2016

AC Boo

124

Massimo Banfi, A25 Nova Milanese Observatory

MEADE LX200R, 25cm f/5, CCD SBIG ST7E NABG

MEADE LX200R, 25cm f/5, CCD SBIG ST7E NABG

----- EBFit result: -----
Tmin = 2457513.54842
Error (1 sigma): +0.00025/-0.00011 (Bootstrapping), +0.00028/-0.00026 (Prayer bead), +0.00126/-0.00126 (LSM)
Error (95% CI): +0.00044/-0.00033 (Bootstrapping), +0.00032/-0.00031 (Prayer bead)
LSM: chi^2 = 0.4, n_freedom = 20

. . .

New minimum 11/3/2016

AC Boo

124

Massimo Banfi, A25 Nova Milanese Observatory

MEADE LX200R, 25cm f/5, CCD SBIG ST7E NABG

MEADE LX200R, 25cm f/5, CCD SBIG ST7E NABG
----- EBFit result: -----
Tmin = 2457513.37335
Error (1 sigma): +0.00015/-0.00015 (Bootstrapping), +0.00007/-0.00005 (Prayer bead), +0.00078/-0.00078 (LSM)
Error (95% CI): +0.00030/-0.00032 (Bootstrapping), +0.00010/-0.00010 (Prayer bead)
LSM: chi^2 = 2.0, n_freedom = 52

. . .

New minimum 11/3/2016

AC Boo

124

Massimo Banfi, A25 Nova Milanese Observatory

MEADE LX200R, 25cm f/5, CCD SBIG ST7E NABG

MEADE LX200R, 25cm f/5, CCD SBIG ST7E NABG
----- EBFit result: -----
Tmin = 2457512.49136
Error (1 sigma): +0.00013/-0.00013 (Bootstrapping), +0.00003/-0.00003 (Prayer bead), +0.00063/-0.00063 (LSM)
Error (95% CI): +0.00028/-0.00027 (Bootstrapping), +0.00006/-0.00005 (Prayer bead)
LSM: chi^2 = 4.2, n_freedom = 68

. . .

New minimum 11/3/2016

AC Boo

124

Massimo Banfi, A25 Nova Milanese Observatory

MEADE LX200R, 25cm f/5, CCD SBIG ST7E NABG

MEADE LX200R, 25cm f/5, CCD SBIG ST7E NABG

----- EBFit result: -----
Tmin = 2457490.46400
Error (1 sigma): +0.00010/-0.00010 (Bootstrapping), +0.00005/-0.00005 (Prayer bead), +0.00051/-0.00051 (LSM)
Error (95% CI): +0.00021/-0.00020 (Bootstrapping), +0.00009/-0.00008 (Prayer bead)
LSM: chi^2 = 5.9, n_freedom = 131

. . .

New minimum 11/3/2016

AC Boo

124

Massimo Banfi, A25 Nova Milanese Observatory

MEADE LX200R, 25cm f/5, CCD SBIG ST7E NABG

MEADE LX200R, 25cm f/5, CCD SBIG ST7E NABG

----- EBFit result: -----
Tmin = 2457490.46398
Error (1 sigma): +0.00010/-0.00009 (Bootstrapping), +0.00004/-0.00005 (Prayer bead), +0.00052/-0.00052 (LSM)
Error (95% CI): +0.00019/-0.00018 (Bootstrapping), +0.00006/-0.00008 (Prayer bead)
LSM: chi^2 = 4.6, n_freedom = 125

. . .

New minimum 11/3/2016

AC Boo

124

Massimo Banfi, A25 Nova Milanese Observatory

MEADE LX200R, 25cm f/5, CCD SBIG ST7E NABG

MEADE LX200R, 25cm f/5, CCD SBIG ST7E NABG

----- EBFit result: -----
Tmin = 2457488.52404
Error (1 sigma): +0.00012/-0.00011 (Bootstrapping), +0.00004/-0.00004 (Prayer bead), +0.00050/-0.00050 (LSM)
Error (95% CI): +0.00025/-0.00023 (Bootstrapping), +0.00007/-0.00007 (Prayer bead)
LSM: chi^2 = 5.4, n_freedom = 91

. . .

New minimum 5/1/2016

AC Boo

124

Urbaník M., Čadca

SKY-WATCHER REF 80/600 + MII G1-0300 0.5x red

SKY-WATCHER REF 80/600 + MII G1-0300 0.5x red

----- EBFit result: -----
Tmin = 2457508.43839
Error (1 sigma): +0.00041/-0.00042 (Bootstrapping), +0.00018/-0.00021 (Prayer bead), +0.00030/-0.00030 (LSM)
Error (95% CI): +0.00081/-0.00082 (Bootstrapping), +0.00026/-0.00039 (Prayer bead)
LSM: chi^2 = 206.2, n_freedom = 97

. . .

New observation 5/1/2016

AC Boo

124

Urbaník M., Čadca

SKY-WATCHER REF 80/600 + MII G1-0300 0.5x red

SKY-WATCHER REF 80/600 + MII G1-0300 0.5x red
----- EBFit result: -----
TminGJD = 2457508.43838
Error (1 sigma): +0.00037/-0.00041 (Bootstrapping), +0.00027/-0.00035 (Prayer bead), +0.00030/-0.00030 (LSM)
Error (95% CI): +0.00079/-0.00080 (Bootstrapping), +0.00033/-0.00049 (Prayer bead)
LSM: chi^2 = 227.1, n_freedom = 107

. . .