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Kepler-12 b

View target in exoplanet catalog

Timing Plot

Total Reductions to Date: 2

Date Processed: 04/27/2025 at 07:00:04 (PDT)

Exoplanet Watch Ephemeris

Parameter	Value	Uncertainty
Orbital Period (Days)	4.437963469537331	1.834576524192559e-07
Ephemeris (BJD_TDB)	2460493.769882004	0.00021661402335027086

Assumed Priors

Parameter	Value	Uncertainty	Units	Reference
RA	286.2434458		decimal
DEC	50.0403671		decimal
Host Star Metallicity	0.07	0.04		Kokori et al. 2023
Host Star log(g)	4.175	0.015	Log10(cgs)	Kokori et al. 2023
Host Star Radius [R_Sun]	1.483	0.025	Sol	Kokori et al. 2023
Host Star Effective Temperature [K]	5947.0	100.0	K	Kokori et al. 2023
a/R_s	8.019	0.014		Kokori et al. 2023
eccentricity	0.0			Q1-Q17 DR25 KOI Table
inclination [degrees]	88.8	0.09	deg	Kokori et al. 2023
omega [degrees]	182.0	97.0	deg	Fortney et al. 2011
orbital period [days]	4.43796263	2.2e-07	day	Kokori et al. 2023
R_p	19.38	0.49	R_Earth	Fulton & Petigura 2018
R_p/R_s	0.128	0		Q1-Q17 DR25 KOI Table
ephemeris [JD]	2455669.703585	2.3e-05	BJD-TDB	Kokori et al. 2023

Previously Published Mid-Transit Times

Value	Uncertainty	Units	Reference
2454955.191563	2.8e-05	BJD	Holczer et al. 2016
2455004.0090033333	2.5000833333333336e-05	BJD, BJD-TDB, HJD, JD	Kokori et al. 2022, Gajdoš et al. 2019, Q1-Q17 DR25 Supplemental KOI Table, Q1-Q17 DR25 KOI Table, Bonomo et al. 2017, Morton et al. 2016, Q1-Q17 DR24 KOI Table, Esteves et al. 2015, Q1-Q16 KOI Table, Q1-Q12 KOI Table, Q1-Q8 KOI Table, Fortney et al. 2011
2455669.703585	2.3e-05	BJD-TDB	Kokori et al. 2023
2459770.377734	0.00187639	BJD	ExoFOP-TESS TOI

Observations

Light curve chart for 0004893

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Parameter	Value	Uncertainty
Am1	1.049	0.025
Am2	-0.042	0.013
a/R_s	8.056	0.041
R_p/R_s	0.143	0.04
ephemeris [JD]	2460249.6727	0.0097
eccentricity	0.0
inclination [degrees]	88.8
omega [degrees]	182.0
orbital period [days]	4.43796263
u0	1.829867135888583
u1	-3.206655971182946
u2	3.7940451581954706
u3	-1.417256266365429
duration	0.1617	0.0088

Not included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
V	Johnson V	502.8 nm	586.8 nm

Organization	Observer Code	Secondary Observers
AAVSO	CPHB (collaborate/publish)	MOBS

Light curve chart for 0006647

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Parameter	Value	Uncertainty
Am1	1.073	0.0091
Am2	-0.056	0.016
a/R_s	7.953	0.039
R_p/R_s	0.1558	0.0079
ephemeris [JD]	2460493.7774	0.0015
eccentricity	0.0
inclination [degrees]	88.8
omega [degrees]	182.0
orbital period [days]	4.43796263
u0	2.0714577188777303
u1	-3.758386556208374
u2	4.243558108745969
u3	-1.556629208181382
duration	0.2039	0.0019

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
CV	Clear (unfiltered) reduced to V sequence	350.0 nm	850.0 nm

Organization	Observer Code	Secondary Observers
AAVSO	NANF (collaborate/publish)

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