Celestron SCT 280/2800 Atik 314L+ red. 0,63x
Adopted limb darkening: 0.5 | EXP. 90s | defocus | FWHM 11.7 px (9,3 arc-sec/pixel) weather: clear, moisture | bortle 5, encircling light pollution | Photometric aperture radii: 10-19-23 | Baader IR-Pass filter 685 nm | transit interrupted due to clouds

Célestron 8, Canon 1100D, sans filtre
Pose 120 secondes

Célestron 8, Canon 1100D, sans filtre
Pose 120 secondes

0.254m reflector F6.894
CCD Atik 383L+ (KAF-8300) MaximDL, 60sec exposures, 2x2 bin= 1.27 "/px, G filter.

0.254m reflector F6.894
CCD Atik 383L+ (KAF-8300) MaximDL, 60sec exposures, 2x2 bin= 1.27 "/px, G filter.

Planewave CDK 17" & SBIG STXL 11002
120 sec pics on Red filter.

C2PU/Epsilon, Cassegrain+ Focal reductor F/9, QSI 632, 84 images, 120s
Circumstances:
Those data were acquired during the practical phase of an Astronomy course delivered by the Côte d’Azur University (Diplôme Universitaire d’Astronomie Observationelle (https://www.oca.eu/fr/duao-oca#:~:text=Le%20DUAO%20(Dipl%C3%B4me%20Universitaire%20d,th%C3%A9orique%20et%20pratique%20en%20astronomie)


Data acquisition:
Date: Sunday, January 15th 2023, 1st image 18:56; 84th and last image: 21:55
Location : C2PU/Calern Observatory (IAU_010), France [long.: +6.92277, lat.: +43.75377, alt. 1260 m]
Telescope: Epsilon, Focal length 9.36m, Aperture diameter: 1.04m
Focus configuration: Cassegrain, + Focal reductor F/9
Science camera: QSI 632, temp.: -20°


Weather:
1st image: temp.: 2.6° (dome+outside), pressure: 864 mbar/hPa, wind: 4.4m/s, hum.: 62%
84th and last image: temp.: 2.3° (dome+outside), pressure: 863 mbar/hPa, wind: 5.3m/s, hum.: 44%


Observers:
Serge DURAND, Paris (serge.deuxieme@hotmail.com)
Alain ESCAFFRE (alain.escaffre@gmail.com)


Data processing:
Serge DURAND, Paris (serge.deuxieme@hotmail.com)


Note about pictures :
They were taken in a defocalised mode.


Important note : there is another star very near HAT-P-20 : UCAC3 229-88754 other name 2MASS 07273963+2420171. This star is fainter than HAT-P-20 by 1.36 mag (R).

Therefore the Real depth (in flux) is the observed one multiplied by 1.3

Zeiss 130/360+C3-61000
Ovlivněno oblačností.

REFR80/600+ST2000XM
Ovlivněno oblačností.

SNT 254/1016+G2-8300
Přerušeno oblačností.

C8 F/6.3, ZWO Asi 1600mm-c, Asiair
Exposure 120s

6" Maksutov f/3.8 (Cecillia) KAF-1402ME CCD
Data reduced and normalized using AstroImageJ, including AIRMASS information and additional detrending parameters for Sky/Pixel_T1 and Peak_T1.

T430mm. cmos ASI6200
Good weather. Poses 120s

400mm f6.8, ST10XME, AO8 guider.
240 second exposure through Rc filter. GPS time control. Partial due to clouds just prior to egress. NOTE, this replaces existing observation #11167

400mm f6.8, ST10XME, AO8 guider.
240 second exposure through Rc filter. GPS time control. Partial due to clouds just prior to egress. NOTE ETD HJD conversion appears different to alternative conversion sources (E.g. https://doncarona.tamu.edu/apps/jd/) or AstroImageJ. Converted time is expected to be 459957.46491(HJD). ETD Tc(HJD) is 0.01d early.

MEADE LX200 S/C 10" + SBIG ST8-XME
180 segundos. Clear Filter

254mm Reflector f4 / ASI174mm
second

NWT 300/1200+ST2000XM
exp. 30s

Cassegrain 430 mm + Zwo ASI6200 Pro mono
120s exposures. Clear filter. Seeing 2". Defocus. Thin clouds coming at egress.

c14 @2280mm GM2000 Moravian G2-1600
Only managed to get exit. Seems to be early.

406 mm LX200 SCT/SBIG STL11k CCD
90 sec

C-14, Paramount MEII, ST-8XME
60 sec exposures, three comparison stars, -5 C

Plane Wave CDK 17" & SBIG STXL11002
120 sec pics on Red filter.

PlaneWave CDK 17 SBIG STLX11002
120 sec pics on IR-UV filter.
7 minutes early vs. ETD

Takahashi FSQ 106 ED, QHY 183M
Observation hampered by clouds until about mid transit.
A light pollution reduction filter was used: Hoya intensifier red enhancer (didymium). Relative photometry analysis with AstroImageJ 3.4.0. Camera settings: Gain: 0, Sensor temperature: -30 °C, Exposure time: 60s

PlaneWave CDK 17 SBIG STLX11002
120 sec pics on Green filter.
4 minutes early vs. ETD

254 mm f/4.3 Schmidt Cassegrain - SBIG ST7XME
116 exp X 90" - Johnson V filter

Newton 25cm + ST-7
Exp. time: 70 s
Binning: 1
CCD Temp.: -15 °C
Very strong light pollution
Weather: good

Celestron 9.25 with Hyperstar f/2.2
partial foggy, filter Astronomic Planet IR PRO 807 nm.

Planewave CDK 17 Moravian 4G
120 sec pics on Green filter.

Celestron 9.25 with Hyperstar f/2.2
clear sky, filter Baader IR PASS 685 nm

PlaneWave CDK 17 SBIG STLX11002
120 sec pics on Green filter
9 minutes early vs. TED

EQ6, C8@f6.3, Atik 314
Quite low at start

PlaneWave CDK 17 SBIG STLX11002
120 sec pics on green filter

PlaneWave CDK 17 SBIG STLX11002
120 sec pics on Green filter

Sekční set: NWT 150/750 + G2-1600
Fullmoon, cirrus

C-14, Paramount MEII, ST-8XME
40 sec unfiltered exposures, 6 comparison stars

Newton 250/1115 + KAF402ME Audine
inverted image X and Y

Cassegrain 430 mm + STL 11K
120 exposures, filter V, binning 1x1, slightly defocused, multicomparison stars

Sekční set: NWT 150/750 + G2-1600
5°od Měsíce, přechodně vysoká oblačnost

Sekční set: NWT 150/750 + G2-1600
5° od Měsíce, vysoká oblačnost

RC 500 f/6 + CCD FLI PROLINE 4710
AAAV-Ass.ne Astrofili Alta Valdera
(www.astrofilialtavaldera.it)
Observers: Alberto Villa.
Clear sky with moon

RC 500 f/6 + CCD FLI PROLINE 4710
AAAV-Ass.ne Astrofili Alta Valdera
(www.astrofilialtavaldera.it)
Observers: Alberto Villa.
Clear sky with Monn

PlaneWave CDK 17 SBIG STLX11002
120 sec pics on Green filter

Newton 410/1710 ccd Audine KAF1600 ME
esposure 35"

RC 500 mm f8
Binning 1x1 - Exposure time 180s

lunette 150 f/5 camera starlight Xpress + EQ6 Pro
pose 90s

PlaneWave CDK 17 SBIG STLX11002
120 sec pics on Red filter

400mm f6.8 ODK, ST10XME, AO8 & filter wheel.
30 second exposures, CCD binned 2x2. Very poor seeing conditions, data points binned.

Cassegrain 430 mm + STL 11K
120 sec exposure filter clear defocused and multi comparison stars

C10 +SBIG ST10
Pose 70 s filtre UHC

16" Meade ACF F8, 10 Micron GM3000 HPS, Moravian G4-9000
1x1 Binning, defocused, some reflections in regress images due to some accidental stray green light being present in the observatory. Observed with CBB (Clear with Blue Blocking) filter.

Cassegrain 430 mm + STL 11k
60 sec exposure filter cleqr binning 1x1 defocused and multi comparison stars

FS102 f6 +DSLR Canon 650D, exp 300sec at 200iso
Far from perfect photometric sky ; some high alt clouds during acquisition.
Defocused.
Software : Karen Collins AstroImageJ.
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