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KOI-217 b

View target in exoplanet catalog

Timing Plot

Total Reductions to Date: 2

Date Processed: 03/30/2025 at 07:00:21 (PDT)

Exoplanet Watch Ephemeris

Parameter	Value	Uncertainty
Orbital Period (Days)	3.905087361471788	1.7201162226964038e-06
Ephemeris (BJD_TDB)	2460507.7338212626	0.0024390886850244914

Assumed Priors

Parameter	Value	Uncertainty	Units	Reference
RA	294.8654667		decimal
DEC	46.2858128		decimal
Host Star Metallicity	0.11	0.1		Gajdoš et al. 2019
Host Star log(g)	4.45342	0.017	Log10(cgs)	Gajdoš et al. 2019
Host Star Radius [R_Sun]	0.947475	0.043	Sol	Gajdoš et al. 2019
Host Star Effective Temperature [K]	5381.0	25.0	K	Gajdoš et al. 2019
a/R_s	11.907	0.308		Q1-Q17 DR25 KOI Table
eccentricity	0.0			Q1-Q17 DR25 KOI Table
inclination [degrees]	89.37	0.2	deg	Q1-Q17 DR25 KOI Table
omega [degrees]	0.0		deg	Gajdoš et al. 2019
orbital period [days]	3.9050824	1.2e-07	day	Gajdoš et al. 2019
R_p	12.5	0.62	R_Earth	Berger et al. 2018
R_p/R_s	0.1461	0		Q1-Q17 DR25 KOI Table
ephemeris [JD]	2454966.41497	2.415e-05	BJD	Gajdoš et al. 2019

Previously Published Mid-Transit Times

Value	Uncertainty	Units	Reference
2454966.4148551296	6.0675e-05	BJD, HJD, JD	Gajdoš et al. 2019, Q1-Q17 DR25 Supplemental KOI Table, Q1-Q17 DR25 KOI Table, Holczer et al. 2016, Morton et al. 2016, Q1-Q17 DR24 KOI Table, Q1-Q16 KOI Table, Q1-Q12 KOI Table, Q1-Q8 KOI Table, Howell et al. 2010
2459422.126663	0.00441052	BJD	ExoFOP-TESS TOI

Observations

Light curve chart for 0001500

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Parameter	Value	Uncertainty
Am1	1.051	0.052
Am2	-0.027	0.02
a/R_s	13.41	0.87
R_p/R_s	0.18	0.056
ephemeris [JD]	2459722.814	0.01
eccentricity	0.0
inclination [degrees]	89.37
omega [degrees]	0.0
orbital period [days]	3.9050824
u0	2.3042039856649303
u1	-4.154378386188273
u2	4.42670083106641
u3	-1.5765263645800847
duration	0.1086	0.0094

Not included in ephemeris calculations

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

Filter	Detail	Min	Max
CBB	Astrodon ExoPlanet-BB	500.0 nm	1000.0 nm

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

Light curve chart for 0006790

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Parameter	Value	Uncertainty
Am1	1.012	0.022
Am2	-0.01	0.029
a/R_s	13.45	0.34
R_p/R_s	0.144	0.011
ephemeris [JD]	2460507.7317	0.0027
eccentricity	0.0
inclination [degrees]	89.37
omega [degrees]	0.0
orbital period [days]	3.9050824
u0	1.9471821579470774
u1	-3.583807216366967
u2	4.146635067171886
u3	-1.5100099469623185
duration	0.1049	0.0029

Included in ephemeris calculations

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

Filter	Detail	Min	Max
CV	MObs CV	350.0 nm	850.0 nm

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

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