exoclock

KELT-3b (LOW)

Discovered by: Pepper et al. 2013

The Star
Simbad
GAIA
2MASS		 BD+41 2024
DR2 806492019492266752
J09543439+4023170
RA 09:54:34.3870 DEC +40:23:16.978
Parallax
4.732 mas		 P.M. RA
-28.328 mas/y		 P.M. DEC
-24.411 mas/y
MagV
9.82		 MagR*
9.579		 MagI*
9.279		 MagJ
8.963		 MagH
8.728		 MagK
8.662
MagG
9.763		 MagGBP
10.014		 MagGRP
9.388
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2025
Mid-time
2458789.04901 ± 0.00011 BJDTDB
Period
2.7033895 ± 2.6e-07 days
Transit Parameters
Pepper et al. 2013
Rp/Rs
0.0939 ± 0.0011		 a/Rs
6.02 +0.24 -0.22
 i
84.2 +0.7 -0.6 deg
e
-		 ω
- deg
DepthR*
10.46 mmag		 Duration*
3.15 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Pepper et al. 2013
Teff
6306.0 +50.0 -49.0 K
 Log(g)
4.21 +0.03 -0.03 cm/s2
 Fe/H
0.04 +0.08 -0.08 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 5.0"
Total Observations (Recent) 61 (10)
O-C 1.3 ± 0.38 minutes
ExoClock Observations (Recent) 35 (10)
Space Observations (Recent) 17 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 9 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.09351 ± 0.00019

KELT-3b


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
KELT-3b (LOW)
2026-01-13		Giovanni Calapai
Home Astronomical Observatory		Celestron 11 Schmidt-Cassegrain
Atik 314L+ / Clear / 90.0		4.3 ± 1.58
KELT-3b (LOW)
2025-12-26		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280/1850 (C11 with Starizona reducer)
Moravian Instruments G2-1600 / R / 120.0		-1.56 ± 1.58
KELT-3b (LOW)
2025-11-10		Tommaso Dittadi
TD-TRO		Ritchey-Chretien
Moravian G2-1600 / R / 60.0		-3.33 ± 1.43
KELT-3b (LOW)
2025-04-13		Charles Miller
Miller Observatory		Meade 12" LX850
QHY268M / R / 40.0		-4.87 ± 1.58
KELT-3b (LOW)
2025-03-30		Alexey Garmash
Lyceum 130		EdgeHD C11
ASI2600MM pro / rpr / 180.0		2.25 ± 1.15
KELT-3b (LOW)
2025-03-19		Vojtěch Školník
Hvězdárna v Úpici		SW N200/800
MI C2-7000A / R / 90.0		8.53 ± 2.74
KELT-3b (LOW)
2025-03-19		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 30.0		4.21 ± 2.02
KELT-3b (LOW)
2025-03-09		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280/1850 (C11 with Starizona reducer)
Moravian Instruments G2-1600 / R / 240.0		3.85 ± 1.17
KELT-3b (LOW)
2025-02-26		Charles Miller
Miller Observatory		Meade 12" LX850
QHY268M / R / 40.0		-0.66 ± 2.02
KELT-3b (LOW)
2025-01-24		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 30.0		7.36 ± 2.88
KELT-3b (LOW)
2025-01-14		samuel Diaz Lopez
Tomas Lopez (AstroCamp)		SCA260
Atik16200MM / V / 30.0		5.72 ± 3.89
KELT-3b (LOW)
2024-12-07		Alvaro Fornas
MPC J57. Centro Astronómico Alto Turia		Planewave CDK 17
QHY600M / R / 240.0		-2.77 ± 1.15
KELT-3b (LOW)
2024-11-29		Martin Crow
Burnham Observatory		Celestron C9.25
SX694 mono / R / 60.0		-0.01 ± 2.3
KELT-3b (LOW)
2024-05-04		Andre Kovacs
Moletai Astronomical Observatory (MAO)		35 cm Maksutov f/3.5
Apogee Alta U47 / R / 15.0		1.82 ± 1.2
KELT-3b (LOW)
2024-05-04		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 30.0		-4.49 ± 3.02
KELT-3b (LOW)
2024-04-15		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 30.0		1.17 ± 4.75
KELT-3b (LOW)
2024-03-01		Deborah Smith
El Olivar, Gergal, Spain		William Optics GT81
QHY9 / Clear / 40.0		5.95 ± 2.74
KELT-3b (LOW)
2024-01-23		Gustavo Muler
Obs. Nazaret J47		lx 200
ST8 XME AO8 / R / 120.0		4.08 ± 0.98
KELT-3b (LOW)
2023-12-19		Matthieu Bachschmidt
Gonachon		Celestron C11
SBIG ST8XME / R / 40.0		-5.78 ± 1.44
KELT-3b (LOW)
2023-04-08		Guillaume Biesse
Observatoire de la colline Tossius		Ritchey Chretien GSO
Moravian G2-4000 / Clear / 44.0		0.67 ± 1.58
KELT-3b (LOW)
2023-04-08		Stéphane Montchaud
Burgundy Observatory		Celestron 8
Zwo Asi 1600 / R / 60.0		-1.49 ± 2.59
KELT-3b (LOW)
2023-04-08		Tõnis Eenmäe
Tartu Observatory		Planewave CDK 12.5
Apogee Alta U42 / R / 20.0		-2.26 ± 1.22
KELT-3b (LOW)
2023-03-12		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 15.0		-1.65 ± 3.46
KELT-3b (LOW)
2023-02-11		Lionel Rousselot
Private observatory Vierzon		Newton 250/1000
ZWO 1600 monochrome / rpr / 30.0		0.64 ± 1.44
KELT-3b (LOW)
2022-03-21		Kevin Johnson
Holbrook Observatory		Meade LX10 EMC
Atik 383L+ / R / 35.0		-0.62 ± 2.02
KELT-3b (LOW)
2022-03-02		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 60.0		-1.44 ± 3.02
KELT-3b (LOW)
2022-01-15		Adrian Jones
Private Observatory (I64)		Meade ACF 30cm
QSI 583 / R / 60.0		-1.7 ± 2.16
KELT-3b (LOW)
2021-11-22		David Wright
Yorick (private observatory)		10" Ritchey-Chretien
QSI 683WSG-8 / R / 75.0		-0.42 ± 2.74
KELT-3b (LOW)
2021-11-22		Martin Crow
Burnham Observatory		Celestron C9.25
SX694 mono / R / 40.0		-0.42 ± 2.59
KELT-3b (LOW)
2021-03-21		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / R / 120.0		-2.8 ± 2.59
KELT-3b (LOW)
2021-01-07		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / R / 120.0		-1.77 ± 1.44
KELT-3b (LOW)
2020-03-31		Martin Crow
Burnham Observatory		Celestron C9.25
SX694 mono / R / 30.0		-1.33 ± 1.15
KELT-3b (LOW)
2020-02-14		Claudio Lopresti
Claudio Lopresti		Mak-Newton
CCD Sbig ST10xme / I / 180.0		-4.61 ± 1.58
KELT-3b (LOW)
2016-04-12		Nikolaos Paschalis
Nunki Observatory		Officina Stellare RILA 400
SBIG STXL 11002 / R / 60.0		0.36 ± 2.16
KELT-3b (LOW)
2013-01-04		Ramon Naves
Montcabrer		Meade LX200 12" ACF
Sbig ST8xme / R / 120.0		-0.42 ± 1.87

Space Observations
Planet
Observation Date		 Mission O-C
minutes
KELT-3b (LOW)
2022-02-24		TESS-0.35 ± 0.48
KELT-3b (LOW)
2022-02-22		TESS0.61 ± 0.43
KELT-3b (LOW)
2022-02-19		TESS1.07 ± 0.5
KELT-3b (LOW)
2022-02-16		TESS0.05 ± 0.49
KELT-3b (LOW)
2022-02-08		TESS-0.82 ± 0.5
KELT-3b (LOW)
2022-02-05		TESS0.88 ± 0.46
KELT-3b (LOW)
2022-02-03		TESS-0.1 ± 0.5
KELT-3b (LOW)
2022-01-31		TESS0.61 ± 0.5
KELT-3b (LOW)
2020-02-17		TESS-0.22 ± 0.46
KELT-3b (LOW)
2020-02-14		TESS-0.88 ± 0.49
KELT-3b (LOW)
2020-02-12		TESS-0.53 ± 0.5
KELT-3b (LOW)
2020-02-09		TESS0.13 ± 0.5
KELT-3b (LOW)
2020-02-04		TESS-0.08 ± 0.52
KELT-3b (LOW)
2020-02-01		TESS0.17 ± 0.53
KELT-3b (LOW)
2020-01-29		TESS0.4 ± 0.55
KELT-3b (LOW)
2020-01-27		TESS0.04 ± 0.5
KELT-3b (LOW)
2020-01-24		TESS0.63 ± 0.5

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2018-04-15 Wang et al. 2021 2.44 ± 2.02
2014-02-18 Baştürk et al. 2015 -0.09 ± 0.3
2012-06-07 Pepper et al. 2013 0.14 ± 2.33
2012-04-14 Pepper et al. 2013 3.63 ± 1.65
2012-04-11 Pepper et al. 2013 0.32 ± 0.77
2012-04-03 Pepper et al. 2013 3.43 ± 1.13
2012-04-03 Pepper et al. 2013 -3.27 ± 1.4
2012-04-03 Pepper et al. 2013 -3.35 ± 1.35
2012-03-18 Pepper et al. 2013 0.29 ± 2.05
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