exoclock

KELT-1b (LOW)

Discovered by: Siverd et al. 2012

The Star
Simbad
GAIA
2MASS		 KELT-1
DR2 2881784280929695360
J00012691+3923017
RA 00:01:26.9169 DEC +39:23:01.782
Parallax
3.697 mas		 P.M. RA
-9.771 mas/y		 P.M. DEC
-7.679 mas/y
MagV
10.63		 MagR*
10.391		 MagI*
10.028		 MagJ
9.682		 MagH
9.534		 MagK
9.437
MagG
10.59		 MagGBP
10.873		 MagGRP
10.175
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2025
Mid-time
2458042.3426 ± 7.5e-05 BJDTDB
Period
1.217493965 ± 6.4e-08 days
Transit Parameters
Beatty et al. 2019
Rp/Rs
0.0771 ± 0.0003		 a/Rs
3.69 +0.04 -0.04
 i
86.8 +0.8 -0.8 deg
e
0.0013 +0.0005 -0.0005
 ω
358.0 +51.0 -51.0 deg
DepthR*
7.71 mmag		 Duration*
2.71 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Siverd et al. 2012
Teff
6518.0 +50.0 -50.0 K
 Log(g)
4.23 +0.03 -0.03 cm/s2
 Fe/H
0.05 +0.08 -0.08 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 6.37"
Total Observations (Recent) 149 (14)
O-C -0.52 ± 0.34 minutes
ExoClock Observations (Recent) 78 (14)
Space Observations (Recent) 33 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 38 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.07521 ± 0.00025

KELT-1b


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
KELT-1b (LOW)
2026-01-07		Tommaso Dittadi
TD-TRO		Ritchey-Chretien
Moravian G2-1600 / I / 120.0		-1.3 ± 1.58
KELT-1b (LOW)
2025-11-29		Trevor Gainey
Kismet		Meade LX200
ZWO ASI 294 MC Pro / R / 45.0		1.88 ± 3.02
KELT-1b (LOW)
2025-11-29		Francesco Conti
Francesco Conti		Celestron C11
ZWO ASI533 pro / R / 60.0		-2.29 ± 3.74
KELT-1b (LOW)
2025-11-12		Snaevarr Guðmundsson
Ness Observatory		Meade LX 200 ACF Schmidt-Cassegrain
SBIG STL 11000M / R / 120.0		-1.84 ± 1.87
KELT-1b (LOW)
2025-10-06		Tommaso Dittadi
TD-TRO		Ritchey-Chretien
Moravian G2-1600 / R / 120.0		-1.82 ± 1.44
KELT-1b (LOW)
2025-10-03		Yen-Hsing Lin
Starry House Observatory		Mewlon 300 CRS
ASI 6200MM Pro / Lum / 60.0		-0.84 ± 1.25
KELT-1b (LOW)
2025-09-19		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 30.0		-4.25 ± 1.87
KELT-1b (LOW)
2025-09-12		samuel Diaz Lopez
Tomas Lopez (AstroCamp)		SCA260
ASI2600MM / ipr / 116.0		-1.7 ± 3.46
KELT-1b (LOW)
2025-09-06		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 30.0		1.71 ± 2.74
KELT-1b (LOW)
2025-09-01		Giovanni Calapai
Home Astronomical Observatory		Celestron 11 Schmidt-Cassegrain
Atik 314L+ / Clear / 90.0		-2.93 ± 1.73
KELT-1b (LOW)
2025-08-22		Simon Dawes
William James II		Celestron Edge11 HD
Risingcam Monochrome SONY imx571 / R / 288.0		4.19 ± 2.59
KELT-1b (LOW)
2025-08-11		Miguel Ángel Álava Amat
Sarriguren		Meade SC 8"
Asi 1600 MM / rpr / 240.0		1.09 ± 2.02
KELT-1b (LOW)
2025-08-04		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 30.0		2.63 ± 2.3
KELT-1b (LOW)
2025-06-27		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 30.0		-2.25 ± 2.16
KELT-1b (LOW)
2024-12-28		Mercedes Correa
Sirius B		Meade
Moravian G2 1600 / R / 70.0		2.94 ± 2.74
KELT-1b (LOW)
2024-12-28		Patrick Farizy
Patrick Farizy		Celestron C8
Touptek 585 C / Clear / 35.0		-1.67 ± 2.16
KELT-1b (LOW)
2024-11-30		David Quiles
David Quiles Observatory		Celestron EDGEHD 800
Omegon veTEC 571M / V / 120.0		4.76 ± 1.73
KELT-1b (LOW)
2024-11-19		Deborah Smith
El Olivar, Gergal, Spain		Newtonian 8"
ASI462MM / R / 40.0		-1.08 ± 4.03
KELT-1b (LOW)
2024-11-19		Ramon Naves
Montcabrer		Meade LX200 12" ACF
Moravian G4-9000 / ipr / 120.0		-2.67 ± 3.74
KELT-1b (LOW)
2024-10-21		Yen-Hsing Lin
Starry House Observatory		Mewlon 300 CRS
ASI 6200MM Pro / Lum / 60.0		2.02 ± 1.27
KELT-1b (LOW)
2024-10-21		Yen-Hsing Lin
NTHU Observatory		Showa 10"
ASI6200MM Pro / Lum / 60.0		-0.28 ± 2.3
KELT-1b (LOW)
2024-10-11		Livia Moretti
Leavitt Observatory		Ritchey-Chrétien 10'' f/8
QHY268 / R / 90.0		-4.67 ± 1.58
KELT-1b (LOW)
2024-10-10		Yen-Hsing Lin
NTHU Observatory		Showa 10"
ASI6200MM Pro / Lum / 60.0		-3.24 ± 1.73
KELT-1b (LOW)
2024-10-05		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / R / 60.0		-1.32 ± 1.15
KELT-1b (LOW)
2024-09-30		Enrique Arce
Vallbona Observatory		Ritchey Chretien
ZWO ASI 294 MM PRO / Lum / 54.0		0.0 ± 1.87
KELT-1b (LOW)
2024-09-13		Daniel Trueba Castillo
Observatori Menelmacar		Vixen Visac VC200L
QHY268M / rpr / 91.0		1.61 ± 2.3
KELT-1b (LOW)
2024-08-12		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 45.0		1.81 ± 1.87
KELT-1b (LOW)
2024-08-12		Simon Dawes
William James II		Celestron Edge11 HD
Risingcam Monochrome SONY imx571 / R / 164.0		-0.5 ± 4.46
KELT-1b (LOW)
2024-08-05		Matthieu Bachschmidt
Gonachon		Celestron C11
SBIG ST8XME / AstrodonExoPlanet-BB / 60.0		-2.13 ± 1.44
KELT-1b (LOW)
2024-07-26		Matthieu Bachschmidt
Gonachon		Celestron C11
SBIG ST8XME / AstrodonExoPlanet-BB / 60.0		0.83 ± 1.11
KELT-1b (LOW)
2024-01-27		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280/1850 (C11 with Starizona reducer)
Moravian Instruments G2-1600 / AstrodonExoPlanet-BB / 120.0		-3.17 ± 1.12
KELT-1b (LOW)
2023-11-10		Simon Dawes
William James II		Celestron Edge11 HD
Risingcam Monochrome SONY imx571 / Lum / 300.0		3.08 ± 1.31
KELT-1b (LOW)
2023-10-09		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 40.0		-2.12 ± 1.87
KELT-1b (LOW)
2023-10-02		Enrique Arce
Vallbona Observatory		Ritchey Chretien
ZWO ASI 294 MM PRO / Lum / 66.0		-6.34 ± 2.02
KELT-1b (LOW)
2023-09-26		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 60.0		7.01 ± 3.02
KELT-1b (LOW)
2023-09-26		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280/1850 (C11 with Starizona reducer)
Moravian Instruments G2-1600 / AstrodonExoPlanet-BB / 240.0		-0.12 ± 1.18
KELT-1b (LOW)
2023-09-26		Michele Tiziano Marini
antaresmtmobservatory (MPCL91)		Sky-Watcher MN190
omegon vetec571c / Clear / 120.0		-4.94 ± 2.02
KELT-1b (LOW)
2023-09-11		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280/1850 (C11 with Starizona reducer)
Moravian Instruments G2-1600 / AstrodonExoPlanet-BB / 270.0		-0.32 ± 0.88
KELT-1b (LOW)
2023-09-11		Martin Crow
Burnham Observatory		Celestron C9.25
SX694 mono / R / 60.0		-3.8 ± 1.14
KELT-1b (LOW)
2023-09-07		Bryan Martin
Tiger Butte Observatory Remote		AG Optical IDK
ZWO ASI 294 / R / 30.0		2.84 ± 1.58
KELT-1b (LOW)
2023-09-04		Paul De Backer
Sorbus		Ritchey-Chrétien
QHY268M / R / 30.0		0.21 ± 1.21
KELT-1b (LOW)
2023-08-24		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 30.0		-1.36 ± 1.38
KELT-1b (LOW)
2023-08-18		Ivo Peretto
MarSEC Marana Space Explorer Center		R-C
Moravia G2-1600 MkII / R / 120.0		2.41 ± 2.74
KELT-1b (LOW)
2023-07-17		jean paul vergne
CH9-gapra		Ritchey Chretien
zwo 294mm pro / Clear / 120.0		0.59 ± 4.61
KELT-1b (LOW)
2023-07-17		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 40.0		-0.42 ± 1.58
KELT-1b (LOW)
2022-12-20		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 40.0		1.12 ± 1.73
KELT-1b (LOW)
2022-10-31		Ivo Peretto
MarSEC Marana Space Explorer Center		R-C
Moravia G2-1600 MkII / R / 120.0		2.49 ± 5.76
KELT-1b (LOW)
2022-10-16		Thomas Wocial
Coppetts Observatory		Celestron C8
QHY183M / AstrodonExoPlanet-BB / 60.0		-0.64 ± 1.58
KELT-1b (LOW)
2022-10-03		Massimiliano Zulian
La Torre Del Sole		Ritchey-Chretien GSO
Moravian G2 4000 / rpr / 60.0		4.16 ± 2.02
KELT-1b (LOW)
2022-09-11		David Arnot
OSO PIRATE		PlaneWave Instruments CDK24 24 inch (610 mm) f/6.5 Corrected Dall-Kirkham Astrograph
FLI ProLine KAF-16803 / R / 35.0		1.37 ± 1.44
KELT-1b (LOW)
2022-09-01		Pieter Vuylsteke
TheGardenToTheSkyFacility		TS ONTC 25cm f4.7
QHY 268M / V / 120.0		-2.55 ± 1.44
KELT-1b (LOW)
2022-08-25		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Clear / 90.0		1.73 ± 1.73
KELT-1b (LOW)
2022-08-25		Adrian Jones
Private Observatory (I64)		Meade ACF 30cm
QSI 583 / R / 60.0		-0.87 ± 1.44
KELT-1b (LOW)
2022-07-24		Miguel Ángel Álava Amat
Sarriguren		Meade SC 8"
Asi 1600 MM / Lum / 180.0		1.48 ± 1.09
KELT-1b (LOW)
2021-12-21		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / R / 120.0		2.12 ± 0.86
KELT-1b (LOW)
2021-12-21		Mark Salisbury
POST		Orion Optics ODK
SBIG ST-10 XME / R / 90.0		1.55 ± 1.15
KELT-1b (LOW)
2021-10-28		Jean-Baptiste Marquette
MrKite47		Newton Sky-Watcher 200/1000
ZWO ASI183MM Pro / R / 90.0		4.9 ± 4.32
KELT-1b (LOW)
2021-10-28		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / R / 90.0		-4.75 ± 5.76
KELT-1b (LOW)
2021-10-25		Taewoo Kim
Deokheung Optical Astronomy Observatory		NYSC 1m Telescope
FLI PL-16803 or PI SOPHIA-2048B / R / 50.0		2.0 ± 0.72
KELT-1b (LOW)
2021-10-21		Snaevarr Guðmundsson
Ness Observatory		Meade LX 200 ACF Schmidt-Cassegrain
SBIG STL 11000M / R / 90.0		5.72 ± 2.59
KELT-1b (LOW)
2021-10-21		Martin Crow
Burnham Observatory		Celestron C9.25
SX694 mono / R / 30.0		0.39 ± 2.59
KELT-1b (LOW)
2021-09-12		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / R / 40.0		4.72 ± 1.87
KELT-1b (LOW)
2021-07-28		Taewoo Kim
Deokheung Optical Astronomy Observatory		NYSC 1m Telescope
FLI PL-16803 or PI SOPHIA-2048B / R / 60.0		0.22 ± 0.72
KELT-1b (LOW)
2020-11-08		Alessandro Nastasi
Galhassin Robotic Telescope 1 (GRT1)		Officina Stellare RiLa 400
FLI ProLine 16803 / zpr / 90.0		-2.37 ± 3.02
KELT-1b (LOW)
2020-11-02		Simon Dawes
William James II Observatory		Skywatcher MN190 2
ZWO ASI 1600MM-PRO USB 3.0 Mono Camera / R / 45.0		-1.26 ± 2.59
KELT-1b (LOW)
2020-09-13		David Wright
Yorick (private observatory)		10" Ritchey-Chretien
QSI 683WSG-8 / R / 85.0		-3.49 ± 2.45
KELT-1b (LOW)
2020-08-12		Carmelo Falco
GALHassin Robotic Telescope 2 (GRT2)		Giacometti-Fogale RC16
Andor Apogee Aspen CG16M / B / 30.0		-0.42 ± 1.15
KELT-1b (LOW)
2020-08-12		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / R / 120.0		-0.56 ± 1.87
KELT-1b (LOW)
2020-08-05		Adam Popowicz
Observatory Pyskowice		RC12" GSO
ASI ZWO 1600 MM / ATIK 11000M / R / 60.0		1.41 ± 3.17
KELT-1b (LOW)
2020-07-26		Fabio Mortari
Hypatia Observatory		Newton 250mm f/4.9
Sbig ST8-XE / R / 120.0		3.5 ± 1.58
KELT-1b (LOW)
2020-07-19		Antonio Marino
UAN c/o INAF-Osservatorio Astronomico di Capodimonte, Naples ITALY		MEADE
CCD Atik 383L / Clear / 60.0		-3.75 ± 4.32
KELT-1b (LOW)
2020-07-15		Francois Regembal
HRTobs		Astrosib RC360
SBIG STX 16803 / Lum / 60.0		0.39 ± 1.58
KELT-1b (LOW)
2020-01-10		Dimitrios Deligeorgopoulos
Artemis Observatory		GSO RC
Atik 16 HR / R / 60.0		4.25 ± 4.32
KELT-1b (LOW)
2019-12-30		Martin Crow
Burnham Observatory		Celestron C9.25
SX694 mono / R / 60.0		-2.74 ± 1.58
KELT-1b (LOW)
2019-08-07		Anaël Wünsche
Observatoire des Baronnies Provençales		Astelco
FLIPL230 / V / 60.0		-0.61 ± 1.58
KELT-1b (LOW)
2015-09-26		Anaël Wünsche
Observatoire des Baronnies Provençales		CDK Planewave
SBIG STL11K / V / 120.0		1.7 ± 1.58
KELT-1b (LOW)
2014-10-11		Davide Ricci
San Pedro Martir		San Pedro Martir Observatory 84cm
MEXMAN / R / 60.0		0.88 ± 0.89
KELT-1b (LOW)
2012-11-19		Ramon Naves
Montcabrer		Meade LX200 12" ACF
Moravian G4-9000 / V / 120.0		0.75 ± 1.44

Space Observations
Planet
Observation Date		 Mission O-C
minutes
KELT-1b (LOW)
2022-10-29		TESS-0.56 ± 0.79
KELT-1b (LOW)
2022-10-28		TESS0.45 ± 0.73
KELT-1b (LOW)
2022-10-27		TESS-0.48 ± 0.82
KELT-1b (LOW)
2022-10-25		TESS-0.99 ± 0.91
KELT-1b (LOW)
2022-10-24		TESS-1.55 ± 0.69
KELT-1b (LOW)
2022-10-23		TESS-1.15 ± 1.01
KELT-1b (LOW)
2022-10-20		TESS-0.06 ± 0.82
KELT-1b (LOW)
2022-10-19		TESS0.04 ± 0.71
KELT-1b (LOW)
2022-10-18		TESS-1.04 ± 0.79
KELT-1b (LOW)
2022-10-17		TESS-1.18 ± 0.75
KELT-1b (LOW)
2022-10-16		TESS-0.05 ± 1.08
KELT-1b (LOW)
2022-10-09		TESS-1.16 ± 0.89
KELT-1b (LOW)
2022-10-08		TESS0.08 ± 0.78
KELT-1b (LOW)
2022-10-07		TESS0.58 ± 0.79
KELT-1b (LOW)
2022-10-06		TESS-0.81 ± 0.84
KELT-1b (LOW)
2022-10-05		TESS-0.91 ± 0.81
KELT-1b (LOW)
2022-10-03		TESS-0.27 ± 0.84
KELT-1b (LOW)
2022-10-02		TESS-1.32 ± 0.91
KELT-1b (LOW)
2022-10-01		TESS-1.04 ± 0.78
KELT-1b (LOW)
2019-10-30		TESS-0.82 ± 0.91
KELT-1b (LOW)
2019-10-29		TESS1.13 ± 0.91
KELT-1b (LOW)
2019-10-28		TESS-0.8 ± 0.86
KELT-1b (LOW)
2019-10-27		TESS0.94 ± 0.91
KELT-1b (LOW)
2019-10-26		TESS-0.2 ± 0.84
KELT-1b (LOW)
2019-10-24		TESS-0.66 ± 0.79
KELT-1b (LOW)
2019-10-23		TESS1.62 ± 0.78
KELT-1b (LOW)
2019-10-22		TESS0.79 ± 0.82
KELT-1b (LOW)
2019-10-15		TESS-0.83 ± 0.85
KELT-1b (LOW)
2019-10-13		TESS-0.28 ± 0.85
KELT-1b (LOW)
2019-10-12		TESS-0.96 ± 0.79
KELT-1b (LOW)
2019-10-11		TESS0.61 ± 0.95
KELT-1b (LOW)
2019-10-10		TESS-0.96 ± 0.76
KELT-1b (LOW)
2019-10-09		TESS-0.11 ± 0.92

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2022-11-11 Baştürk et al. 2023 -0.06 ± 0.39
2021-10-26 Baştürk et al. 2023 1.47 ± 0.72
2021-10-10 Baştürk et al. 2023 -0.26 ± 0.53
2021-09-28 Baştürk et al. 2023 0.34 ± 0.96
2021-08-26 Baştürk et al. 2023 1.64 ± 0.61
2021-07-29 Baştürk et al. 2023 0.57 ± 0.78
2018-11-05 Maciejewski et al. 2018 -0.99 ± 1.58
2018-09-05 Maciejewski et al. 2018 -0.85 ± 2.02
2018-01-07 Maciejewski et al. 2018 -0.98 ± 1.21
2017-11-23 Maciejewski et al. 2018 -0.73 ± 1.22
2017-09-30 Maciejewski et al. 2018 2.19 ± 1.05
2017-09-23 Maciejewski et al. 2018 -0.86 ± 0.78
2017-09-23 Baştürk et al. 2023 -0.88 ± 0.29
2017-09-19 Maciejewski et al. 2018 -0.62 ± 0.66
2017-08-22 Baştürk et al. 2023 1.89 ± 0.44
2017-08-15 Maciejewski et al. 2018 -0.29 ± 1.11
2017-08-05 Baştürk et al. 2023 1.46 ± 0.36
2017-07-25 Maciejewski et al. 2018 -0.59 ± 0.78
2017-01-08 Baştürk et al. 2023 -0.01 ± 0.55
2016-09-30 Baştürk et al. 2023 -0.42 ± 0.3
2015-10-11 Beatty et al. 2020 -0.01 ± 0.4
2015-08-20 Baştürk et al. 2023 0.06 ± 0.44
2014-10-20 Baştürk et al. 2023 0.9 ± 0.4
2013-10-18 Beatty et al. 2017 0.39 ± 0.86
2013-09-12 Baştürk et al. 2023 0.26 ± 0.34
2013-09-12 Baştürk et al. 2023 -0.07 ± 0.37
2012-10-22 Baştürk et al. 2023 0.57 ± 0.64
2012-09-11 Beatty et al. 2014 3.43 ± 3.31
2012-09-10 Beatty et al. 2014 3.7 ± 3.17
2012-09-09 Baştürk et al. 2023 0.03 ± 0.25
2012-01-07 Siverd et al. 2012 0.21 ± 0.58
2012-01-01 Siverd et al. 2012 0.23 ± 0.59
2011-12-18 Parviainen et al. 2022 -1.08 ± 0.58
2011-12-16 Siverd et al. 2012 -3.79 ± 0.63
2011-12-13 Maciejewski et al. 2018 -0.41 ± 0.4
2011-12-10 Siverd et al. 2012 -3.04 ± 1.2
2011-12-04 Siverd et al. 2012 2.56 ± 1.44
2011-12-04 Siverd et al. 2012 1.22 ± 0.62
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