Recent

New transit 9/11/2026

HAT-P-23 b

163

Manfred Raetz, Privatsternwarte Herges-Hallenberg, 8/26/2026

SCT 280 / 1870 (C11 with Starizona reducer) CCD: MII G2-1600 filter : Astrodon ExoPlanet-BB (V to IR)

SCT 280 / 1870 (C11 with Starizona reducer) CCD: MII G2-1600 filter : Astrodon ExoPlanet-BB (V to IR)
detrended with AstroImageJ 6.0.10.00

. . .

New transit 9/3/2026

HAT-P-23 b

163

David Molina, 9/1/2026

S/C235 - KAF8300

. . .

New transit 8/1/2026

HAT-P-23 b

163

Kyle Carr, Walnut Park, 8/1/2026

Celestron C11 with 0.63 reducer, ZWO ASI533MM Pro

Celestron C11 with 0.63 reducer, ZWO ASI533MM Pro
Windy. Some data loss due to high clouds.

. . .

New transit 7/20/2026

HAT-P-23 b

163

Robert Majewski, RM-SRO, 7/20/2026

Celestron 11 inch Edge HD

. . .

New transit 7/13/2026

HAT-P-23 b

163

Giovanni Calapai, Calapai Astronomical Observatory, 7/13/2026

Celestron C14 (SCT 356/3910) Atik 314L+ red. 0,7x

. . .

New transit 10/8/2025

HAT-P-23 b

163

Manfred Raetz, Privatsternwarte Herges-Hallenberg, 7/1/2025

SCT 280 / 1870 (C11 with Starizona reducer) CCD: MII G2-1600 filter : Astrodon ExoPlanet-BB (V to IR)

SCT 280 / 1870 (C11 with Starizona reducer) CCD: MII G2-1600 filter : Astrodon ExoPlanet-BB (V to IR)
already detrended with AstroImageJ 5.5.1.00

. . .

New transit 7/5/2025

HAT-P-23 b

163

Vojtěch Školník, Broumov NMO, 7/1/2025

Sct 200/2000 (reduced to 1350) + MI C2-7000A

. . .

New transit 7/2/2025

HAT-P-23 b

163

Mario Morales Aimar, Observatorio de Sencelles, 7/1/2025

Newtonian 250 mm f/4 - SBIG ST-7XME

Newtonian 250 mm f/4 - SBIG ST-7XME
159 EXP. X 70"

. . .

New transit 1/14/2025

HAT-P-23 b

163

Samuel Diaz Lopez, Observatorio Tomas Lopez. AstroCamp. , 8/8/2021

SCA260 + Atik16200

. . .

New transit 11/25/2024

HAT-P-23 b

163

Manfred Raetz, Privatsternwarte Herges-Hallenberg, 7/31/2024

SCT 280 / 1870 (C11 with Starizona reducer)+ CCD MII G2-1600

SCT 280 / 1870 (C11 with Starizona reducer)+ CCD MII G2-1600
filter : Astrodon ExoPlanet-BB (V to IR)
Exposure time of 240 s is achieved by combining two exposures of 120 s each

. . .

New transit 11/7/2024

HAT-P-23 b

163

Thomas Karl Friedli + Abhiraj Roy Choudhury, Sonnenturm Uecht Observatory, 8/27/2024

William Optics 132/925 mm + ZWO ASI6200 MM Pro CMOS + Johnson V filter

. . .

New transit 10/19/2024

HAT-P-23 b

163

Team OSI, Chandolin, Swiss

Telescop Newton 200/1000 Monture HEQ6 ZWO 178 AMM cooled at-15°C, setup drived by NINA

Telescop Newton 200/1000 Monture HEQ6 ZWO 178 AMM cooled at-15°C, setup drived by NINA
590 frames, 7 seconds, 50 ISO Data were collected by teenagers during a science camp with Objectif Sciences International

. . .

New transit 9/2/2024

HAT-P-23 b

163

Andre Kovacs, Erika Pakštienė, Moletai Astronomical Observatory (MAO); Lithuania

MAO, 35cm MCT 350/1200 + Apogee Alta-U47-BB

MAO, 35cm MCT 350/1200 + Apogee Alta-U47-BB
RAW data calibrated and reduced using AstroImageJ, including information on AIRMASS and additional (optional) detrending parameters for AIRMASS. Tried many different combinations of comps but could not match the expected transit depth for ExoClock. However, the transit depth obtained is consistent with observations from others on Exoplanet Watch for the R filter.

. . .

New transit 8/28/2024

HAT-P-23 b

163

Matthieu BACHSCHMIDT, Gonachon

C11 f/6.7 + SBIG ST8XME

C11 f/6.7 + SBIG ST8XME
Astrodon BB exo filter, 120s exposure

. . .

New transit 8/17/2024

HAT-P-23 b

163

John Collins, Wrexham

10inch SCT @F4 / ASI290m

10inch SCT @F4 / ASI290m
Filter = r

. . .

New transit 8/11/2024

HAT-P-23 b

163

Mario Morales, Observatorio de Sencelles, Spain - MPC K14

Newtonian 250 mm f/4 - SBIG ST7XME

Newtonian 250 mm f/4 - SBIG ST7XME
131 EXP. X 100" CLEAR FILTER

. . .

New transit 7/31/2024

HAT-P-23 b

163

Samuel Diaz Lopez, AstroCamp (Spain)

RC10 + Atik16200

. . .

New transit 7/20/2024

HAT-P-23 b

163

Samuel Diaz Lopez, AstroCamp (Spain)

RC10 + Atik16200

. . .

New transit 7/14/2024

HAT-P-23 b

163

Anaël Wünsche, UAI B10 Observatoire des Baronnies Provençales

Planewave 17" + ZWO ASI 6200 MM pro mono

Planewave 17" + ZWO ASI 6200 MM pro mono
R filter. 120s exposures. Thin clouds before ingress then all clear. Temp. -15°C instead of -20°C due to heat wave in south of France.

. . .

New transit 7/14/2024

HAT-P-23 b

163

Yves Jongen, Rasteau Observatory

Planewave CDK 17" & SBIG STXL 11002

Planewave CDK 17" & SBIG STXL 11002
120 sec pics on IR-UV filter.

. . .

New transit 7/14/2024

HAT-P-23 b

163

Samuel Diaz Lopez, AstroCamp (Spain)

RC10 + Atik16200

. . .

New transit 7/10/2024

HAT-P-23 b

163

Giuseppe Marino, Gruppo Astrofili Catanesi

Newton 25cm f/4.8 + coma corrector + SBIG ST-7XME

. . .

New transit 11/10/2023

HAT-P-23 b

163

Mario Morales, Observatorio de Sencelles, Spain - MPC K14

Newtonian 250 mm f/4 - SBIG ST7XME

Newtonian 250 mm f/4 - SBIG ST7XME
120 EXP. X 100sec - CLEAR FILTER

. . .

New transit 8/24/2023

HAT-P-23 b

163

Vojtěch Školník, Hvězdárna Valašské Meziříčí

Sct 200/2000 (reduced to 1300) + MI C2-7000A

. . .

New transit 8/21/2023

HAT-P-23 b

163

Eduardo Fernández Lajús, Romina P. Di Sisto, Complejo Astronómico El Leoncito, Argentina

0.6 m Telescope + SBIG STL 1001 CCD

. . .

New transit 8/1/2023

HAT-P-23 b

163

Claudio Lopresti, GAD Observatory - SP

Mak-Newton 180mm F/4 - Sbig ST10xme

. . .

New transit 9/1/2022

HAT-P-23 b

163

F. Lomoz, Sedlčany

Zeiss 130/360+C3-61000

Zeiss 130/360+C3-61000
exp. 118s

. . .

New transit 8/30/2022

HAT-P-23 b

163

F. Lomoz, Sedlčany

SNT 254/1016+G2-8300

SNT 254/1016+G2-8300
exp. 80s

. . .

New transit 8/14/2022

HAT-P-23 b

163

proust jerome, plessis grammoire

ODK16 +ccd H16

ODK16 +ccd H16
120sec/exposure

. . .

New transit 8/13/2022

HAT-P-23 b

163

Yves Jongen, Rasteau Observatory

Plane-Wave CDK 17" & SBIG STXL 11002

Plane-Wave CDK 17" & SBIG STXL 11002
120 sec pics on IR-UV filter.

. . .

New transit 8/2/2022

HAT-P-23 b

163

Samuel Diaz Lopez, AstroCamp (Spain)

RC 10 + atik16200

. . .

New transit 7/10/2022

HAT-P-23 b

163

Matthieu BACHSCHMIDT, Gonachon

C11 + SBIG ST8XME

C11 + SBIG ST8XME
Astrodon BB exo filter
60s exposure bin 2x2

. . .

New transit 10/9/2021

HAT-P-23 b

163

Anaël Wünsche, UAI B10 Baronnies Provencales Observatory

Cassegrain 430 mm + Zwo ASI6200 Pro mono

Cassegrain 430 mm + Zwo ASI6200 Pro mono
R filter. 120s exposures. 1.3" seeing. New moon. Slight defocus. High humidity. Low elevation at egress.

. . .

New transit 10/4/2021

HAT-P-23 b

163

Yves Jongen, Deep Sky Chile

Plane Wave CDK 17" & Moravian 4G

Plane Wave CDK 17" & Moravian 4G
120 sec pics on IR-UV filter.

. . .

New transit 9/27/2021

HAT-P-23 b

163

Wonseok Kang, Deokheung Optical Astronomy Observatory

NYSC 1m Telescope + SOPHIA-2048B

. . .

New transit 9/17/2021

HAT-P-23 b

163

Yves Jongen, Deep Sky Chile

Plane Wave CDK 17" & Moravian 4G

Plane Wave CDK 17" & Moravian 4G
120 sec pics on IR-UV filter.

. . .

New transit 8/25/2021

HAT-P-23 b

163

F. Lomoz, Sedlčany

NWT 300/1200+ST2000XM

NWT 300/1200+ST2000XM
exp. 50s

. . .

New transit 8/9/2021

HAT-P-23 b

163

Samuel Diaz Lopez, AstroCamp (Spain)

RC 10 + atik16200

. . .

New transit 8/2/2021

HAT-P-23 b

163

Maurice Audejean, Chinon Observatory B92

0.32-m f/6 Newtonian reflector + CCD

0.32-m f/6 Newtonian reflector + CCD
Observations at the Dauban / ChantePerdrix observatory A77. (N43.9997 E5.6475)
Telescope Newtonian 400 mm f 1120
CCD Atik 160ex.

. . .

New transit 6/12/2021

HAT-P-23 b

163

Yves Jongen, Rasteau Observatory

Plane Wave CDK 17" & SBIG STXL11002

Plane Wave CDK 17" & SBIG STXL11002
120 sec pics on IR-UV filter.

. . .

New transit 5/26/2021

HAT-P-23 b

163

Jean Plazas, Ribot Observatory

C14 F/7 + camera SBIG ST10

C14 F/7 + camera SBIG ST10
70 sec exposure filter clear binning 2x2 defocused and multi comparaison stars

. . .

New transit 12/9/2020

HAT-P-23 b

163

Ferran Grau Horta, Ca l Ou (MPC-C71)

Meade 16 + FLI PL1001

. . .

New transit 12/5/2020

HAT-P-23 b

163

JOSEP GAITAN, MAS MOIXA MPC C86

SC 10" F 6.8 ST8 + AO8

SC 10" F 6.8 ST8 + AO8
240 S.SEING WIND

. . .

New transit 8/25/2020

HAT-P-23 b

163

Lorenzo Barbieri, AAB Medelana (BO) Italy

Newton 400mm f/5

Newton 400mm f/5
A lot of clouds at the first contact time

. . .

New transit 8/25/2020

HAT-P-23 b

163

Yves Jongen, Rasteau observatory

PlaneWave CDK 17 SBIG STLX11002

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

. . .

New transit 8/20/2020

HAT-P-23 b

163

Pedro Martorell, Observatorio Astronomico de Guirguillano

SCT 14" + CCD Moravian G4-9000

. . .

New transit 8/14/2020

HAT-P-23 b

163

Pavel Pintr, Horní Halže

Skywatcher ED 80/600 na EQ - 6 Skyscan

Skywatcher ED 80/600 na EQ - 6 Skyscan
filter Baader 865 nm IR, clear sky

. . .

New transit 8/8/2020

HAT-P-23 b

163

F. Lomoz, Sedlčany

SNT254/1016+G2-8300

. . .

New transit 8/8/2020

HAT-P-23 b

163

Lorenzo Barbieri, AAB Medelana (BO) Italy

Newton 400mm f/5

. . .

New transit 8/8/2020

HAT-P-23 b

163

F. Lomoz, Sedlčany

NWT 300/1200+ST2000XM

. . .

New transit 7/22/2020

HAT-P-23 b

163

Arena Claudio, Private Observatory in Catania - ObservatoryCT

Sky-Watcher NWT 200/1000 + Atik 314L + 0.9x Coma corrector

Sky-Watcher NWT 200/1000 + Atik 314L + 0.9x Coma corrector
200 sec exposure. Flip during the mid of the transit. Slight Defocus.

. . .

New transit 7/13/2020

HAT-P-23 b

163

Arena Claudio, Private Observatory in Catania - ObservatoryCT

Sky-Watcher NWT 200/1000 + Atik 314L + 0.9x Coma corrector

Sky-Watcher NWT 200/1000 + Atik 314L + 0.9x Coma corrector
200 sec exposure time. A bit of light pollution from Moon.
End of observation at Twilight.

. . .

New transit 7/5/2020

HAT-P-23 b

163

maurizio cervoni, ATA Fuligni (Rocca di Papa - RM)

Meade ACF 350/3500

. . .

New transit 6/8/2020

HAT-P-23 b

163

Yves Jongen, Deep Sky Chile

Planewave CDK 17 Moravian 4G

Planewave CDK 17 Moravian 4G
120 sec pics on IR-UV filter.
11 minutes late vs. ETD

. . .

New transit 9/29/2019

HAT-P-23 b

163

Yves Jongen, Rasteau observatory

PlaneWave CDK 17 SBIG STLX11002

PlaneWave CDK 17 SBIG STLX11002
120 sec pics on IR-UV filter
8 min late vs. ETD

. . .

New transit 9/29/2019

HAT-P-23 b

163

astromb, Gonachon obs

C11 + SBIG ST8XME

C11 + SBIG ST8XME
BB exo filter

. . .

New transit 9/18/2019

HAT-P-23 b

163

Anaël Wünsche, UAI B10 Baronnies Provençales Observatory

RC 82 cm - CCD FLI PL230

RC 82 cm - CCD FLI PL230
120s exposures. Filter V. Slight defocus. seeing around 4". Gibbous moon. Multicomparison stars.

. . .

New transit 9/6/2019

HAT-P-23 b

163

Yenal Ogmen, Green Island Observatory

14" LX200R + ST-8XME CCD

. . .

New transit 8/15/2019

HAT-P-23 b

163

Marc Bretton, UAI B10 Baronnies Provençales Observatory

RC 82 cm - CCD FLI PL230

RC 82 cm - CCD FLI PL230
120 sec exposure filter clear binning 1x1 defocused and multi comparison stars, clouds before egress

. . .

New transit 8/15/2019

HAT-P-23 b

163

Yves Jongen, Rasteau Observatory

PlaneWave CDK17" & SBIG STXL11002

PlaneWave CDK17" & SBIG STXL11002
120 sec pics on Green filter
Clouds around 23h10 UTC

. . .

New transit 8/11/2019

HAT-P-23 b

163

Scigifoto skupina Úpice, Úpice

NWT 194/1000mm + CCD MII G2-8300

NWT 194/1000mm + CCD MII G2-8300
Martin Tylšar, Martin Mašek, Jakub Hadač, Vojtěch Tlustý.

Light curve made from 7 light curves according to 7 comparison star.

. . .

New transit 8/9/2019

HAT-P-23 b

163

Claudio Lopresti, GAD-sp

Mak-Newton 180mm F/4 - Sbig ST10xme

. . .

New transit 8/7/2019

HAT-P-23 b

163

Alberto Tomatis, Alto-Observatory

RC 16

. . .

New transit 8/4/2019

HAT-P-23 b

163

Marc Bretton, UAI B10 Baronnies Provençales Observatory

RC 82 cm - CCD FLI PL230

RC 82 cm - CCD FLI PL230
120 sec exposure filter clear defocused and multi comparison stars

. . .

New transit 7/12/2019

HAT-P-23 b

163

Luis Tremosa, Observatorio E Sueño MPC C90

newton 300 F5 + ccd

. . .

New transit 6/28/2019

HAT-P-23 b

163

Pere Guerra, Observatori Astronòmic Albanyà

16" Meade ACF F8, 10 Micron GM3000 HPS, Moravian G4-9000

16" Meade ACF F8, 10 Micron GM3000 HPS, Moravian G4-9000
2x2 Binning, CBB Filter, lots of systematics due to bad tracking. Airmass detrended with AstroimageJ.

. . .

New transit 5/22/2019

HAT-P-23 b

163

Pere Guerra, Observatori Astronòmic Albanyà

16" Meade ACF F8, 10 Micron GM3000 HPS, Moravian G4-9000

16" Meade ACF F8, 10 Micron GM3000 HPS, Moravian G4-9000
2x2 Binning, CBB Filter. Some mount issues prevented proper tracking. Airmass detrended with AstroimageJ.

. . .

New transit 10/22/2018

HAT-P-23 b

163

Marc Bretton, UAI B10 Baronnies Provençales Observatory

RC 82 cm - CCD FLI PL230

RC 82 cm - CCD FLI PL230
60 sec exposure filter LNIR binning 1x1 defocused and multi comparison stars

. . .

New transit 10/7/2018

HAT-P-23 b

163

Ferran Grau Horta, Ca l Ou (MPC-C71)

Meade 16

. . .

New transit 9/25/2018

HAT-P-23 b

163

Tomasz Popajewski, ZS12 Lublin

Meade LX200 ACF 14", Atik 314L+

. . .

New transit 8/29/2018

HAT-P-23 b

163

Marc Bretton, UAI B10 Baronnies Provençales Observatory

RC 82 cm - CCD FLI PL230

RC 82 cm - CCD FLI PL230
120 sec exposure filter LNIR binning defocused and multi comparison stars

. . .

New transit 8/21/2018

HAT-P-23 b

163

F. Lomoz, Sedlčany

Newton 300/1200+ST2000XM

. . .

New transit 8/21/2018

HAT-P-23 b

163

F. Lomoz, Sedlčany

SNT 254/1016+G2-8300

. . .

New transit 8/16/2018

HAT-P-23 b

163

David Molina, AnunakiObservatory MPC-Z51 | Manzanares el Real

S/C 203mm + CCD ST8xme

S/C 203mm + CCD ST8xme
180",bin 1x1,filter clear,5 comparison stars.

. . .

New transit 8/6/2018

HAT-P-23 b

163

Wonseok Kang, Deokheung Optical Astronomy Observatory

NYSC 1m Tel. + FLI PL-16803 / PI SOPHIA-2048B

. . .

New transit 8/5/2018

HAT-P-23 b

163

Wonseok Kang, Deokheung Optical Astronomy Observatory

NYSC 1m Tel. + FLI PL-16803 / PI SOPHIA-2048B

. . .

New transit 8/5/2018

HAT-P-23 b

163

Wonseok Kang, Deokheung Optical Astronomy Observatory

NYSC 1m Tel. + FLI PL-16803

. . .

New transit 8/4/2018

HAT-P-23 b

163

František Lomoz, Sedlčany

Newton 300/1200+ST2000XM

Newton 300/1200+ST2000XM
Rušeno oblačností.

. . .

New transit 8/4/2018

HAT-P-23 b

163

F. Lomoz, Sedlčany

SNT 254/1016+G2-8300

. . .

New transit 7/30/2018

HAT-P-23 b

163

Pere Guerra, Observatori Astronomic Albanyà

16" Meade ACF F8 Moravian G4-9000

16" Meade ACF F8 Moravian G4-9000
2x2 Binning, Clear with Blue Blocking (CBB filter).

Observed until dawn.

. . .

New transit 7/24/2018

HAT-P-23 b

163

David Molina, AnunakiObservatory MPC-Z51 | Manzanares el Real

S/C 203mm + CCD ST8xme

S/C 203mm + CCD ST8xme
180",bin 1x1,filter clear,6 comparison stars.

. . .

New transit 7/24/2018

HAT-P-23 b

163

Yves Jongen, Rasteau observatory

PlaneWave CDK 17 SBIG STLX11002

. . .

New transit 7/18/2018

HAT-P-23 b

163

Yves Jongen, Rasteau observatory

PlaneWave CDK 17 SBIG STLX11002

. . .

New transit 7/12/2018

HAT-P-23 b

163

David Molina, AnunakiObservatory MPC-Z51 | Manzanares el Real

S/C 203mm + CCD ST8xme

S/C 203mm + CCD ST8xme
180",bin 1x1,filter clear,6 comparison stars.
Impossible to observe the ingress transit.

. . .

New transit 7/12/2018

HAT-P-23 b

163

Marc Bretton, UAI B10 Baronnies Provençales Observatory

RC 82 cm - CCD FLI PL230

RC 82 cm - CCD FLI PL230
120 sec exposure filter LNIR defocus and multi comparison stars binning 1x1

. . .

New transit 7/8/2018

HAT-P-23 b

163

David Molina, AnunakiObservatory MPC-Z51 | Manzanares el Real

S/C 203mm + CCD ST8xme

S/C 203mm + CCD ST8xme
180",bin 1x1,filter clear,6 comparison stars

. . .

New transit 7/7/2018

HAT-P-23 b

163

Yves Jongen, Rasteau observatory

PlaneWave CDK 17 SBIG STLX11002

. . .

New transit 7/1/2018

HAT-P-23 b

163

Marc Bretton, UAI B10 Baronnies Provençales Observatory

RC 82 cm - CCD FLI PL230

RC 82 cm - CCD FLI PL230
60 sec exposure filter LNIR no defocus multi comparison stars binning 1x1

. . .

New transit 11/21/2017

HAT-P-23 b

163

Mario Morales, Observatorio de Sencelles, Spain - MPC K14

254 mm f/3.3 Schmidt Cassegrain - SBIG ST7XME

254 mm f/3.3 Schmidt Cassegrain - SBIG ST7XME
105 exposures X 100" -25ºC

. . .

New transit 10/22/2017

HAT-P-23 b

163

Friedli, Thomas Karl + Friedli, Anna Lea + Enderli, Patrick, Sonnenturm Uecht

Wiliam Optics 132/925 mm + QSI 683wsg-8

Wiliam Optics 132/925 mm + QSI 683wsg-8
120 sec

. . .

New transit 10/17/2017

HAT-P-23 b

163

Marc Bretton, UAI B10 Baronnies Provencales Observatory

Cassegrain 430 mm + STL11K

Cassegrain 430 mm + STL11K
120 sec exposure filter clear binning 1x1 defocused and multi comparison stars

. . .

New transit 10/7/2017

HAT-P-23 b

163

Mark Salisbury, Private Observatory

400mm f6.8 ODK, ST10XME, filter wheel

400mm f6.8 ODK, ST10XME, filter wheel
150second exposure unfiltered. CCD binned 2x2 and defocused ~12". Full moon and passing clouds. Limb darkening 0.4 used.

. . .

New transit 9/30/2017