results

GJ 1214 b

Total Reductions to Date: 8

Date Processed: 05/30/2025 at 07:00:33 (PDT)

Exoplanet Watch Ephemeris

Parameter	Value	Uncertainty
Orbital Period (Days)	1.580404500094126	3.538538005578388e-09
Ephemeris (BJD_TDB)	2460159.734340699	3.456369132043805e-06

Assumed Priors

Parameter	Value	Uncertainty	Units	Reference
RA	258.8313991		decimal
DEC	4.9606795		decimal
Host Star Metallicity	0.24	0.11		Mahajan et al. 2024
Host Star log(g)	5.0286	0.0078	Log10(cgs)	Mahajan et al. 2024
Host Star Radius [R_Sun]	0.2162	0.0025	Sol	Mahajan et al. 2024
Host Star Effective Temperature [K]	3026.0	130.0	K	Yalçınkaya et al. 2024
a/R_s	15.27	0.02		Schlawin et al. 2024
eccentricity	0.0	0.0079		Schlawin et al. 2024
inclination [degrees]	89.32	0.03	deg	Schlawin et al. 2024
omega [degrees]	90.0	7.5	deg	Schlawin et al. 2024
orbital period [days]	1.580404341	7.9e-08	day	Schlawin et al. 2024
R_p	2.733	0.033	R_Earth	Mahajan et al. 2024
R_p/R_s	0.1159	0		Mahajan et al. 2024
ephemeris [JD]	2460143.93029503	3.58e-06	BJD-TDB	Schlawin et al. 2024

Previously Published Mid-Transit Times

Value	Uncertainty	Units	Reference
2454934.916934	2.7e-05	BJD	Cáceres et al. 2014
2454964.944054	0.0002315	HJD, UTC-BJD	Sada et al. 2010, Charbonneau et al. 2009
2454980.748863667	6.333333333333333e-05	BJD-TDB	Gillon et al. 2014, Carter et al. 2011, Carter et al. 2011
2455320.535733	2.1e-05	BJD-TDB	Harpsøe et al. 2013
2455701.413328	6.6e-05	BJD	Cloutier et al. 2021
2455799.398485	1.9e-05	BJD-TDB	Yalçınkaya et al. 2024
2455881.57931	2.2e-05	BJD-TDB	Kokori et al. 2022
2455886.320526	2.3e-05	BJD-TDB	Kokori et al. 2023
2459639.7812619	9e-06	BJD-TDB	Mahajan et al. 2024
2460143.93029503	3.58e-06	BJD-TDB	Schlawin et al. 2024

Observations

Copy link to this observation

Parameter	Value	Uncertainty
Am1	0.332	0.081
Am2	0.99	0.29
a/R_s	15.302	0.058
R_p/R_s	0.23	0.066
ephemeris [JD]	2459402.74	0.01
eccentricity	0.0
inclination [degrees]	89.32
omega [degrees]	90.0
orbital period [days]	1.580404341
u0	1.121339118792635
u1	-0.2818435003710781
u2	0.25827021396852823
u3	-0.09776582854155902
duration	0.0398	0.0024

Not 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	LPAC (collaborate/publish)

Copy link to this observation

Parameter	Value	Uncertainty
Am1	1.593	0.057
Am2	-0.4	0.35
a/R_s	15.184	0.059
R_p/R_s	0.143	0.037
ephemeris [JD]	2459710.92	0.012
eccentricity	0.0
inclination [degrees]	89.32
omega [degrees]	90.0
orbital period [days]	1.580404341
u0	1.6020333509192557
u1	-1.1994798840662335
u2	0.8539207288706983
u3	-0.25647418299931
duration	0.0372	0.0019

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)

Copy link to this observation

Parameter	Value	Uncertainty
Am1	0.885	0.017
Am2	0.069	0.044
a/R_s	15.318	0.057
R_p/R_s	0.231	0.067
ephemeris [JD]	2459726.6901	0.0089
eccentricity	0.0
inclination [degrees]	89.32
omega [degrees]	90.0
orbital period [days]	1.580404341
u0	1.6049676748513193
u1	-1.2064790693865286
u2	0.8598209391606487
u3	-0.258309531813109
duration	0	0

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)

Copy link to this observation

Parameter	Value	Uncertainty
Am1	1.0318	0.01
Am2	-0.0179	0.0078
a/R_s	15.181	0.057
R_p/R_s	0.121	0.024
ephemeris [JD]	2460072.817	0.0049
eccentricity	0.0
inclination [degrees]	89.32
omega [degrees]	90.0
orbital period [days]	1.580404341
u0	1.2625018534197587
u1	-0.3499291553719476
u2	0.11062075861791024
u3	-0.023193455017343642
duration	0.03671	0.00079

Not included in ephemeris calculations

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

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

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

Copy link to this observation

Parameter	Value	Uncertainty
Am1	1.0109	0.0016
Am2	-0.0065	0.0064
a/R_s	15.177	0.058
R_p/R_s	0.1055	0.0053
ephemeris [JD]	2460134.45168	0.00071
eccentricity	0.0
inclination [degrees]	89.32
omega [degrees]	90.0
orbital period [days]	1.580404341
u0	0.8580336544474886
u1	-0.18906384313301605
u2	0.5762732407071796
u3	-0.24524304343451164
duration	0.03614	0.00024

Included in ephemeris calculations

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

Filter	Detail	Min	Max
R	Cousins R	561.7 nm	719.7 nm

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

Copy link to this observation

Parameter	Value	Uncertainty
Am1	1.043	0.015
Am2	-0.036	0.052
a/R_s	15.173	0.058
R_p/R_s	0.11	0.023
ephemeris [JD]	2460140.7755	0.0041
eccentricity	0.0
inclination [degrees]	89.32
omega [degrees]	90.0
orbital period [days]	1.580404341
u0	0.8604924316058284
u1	-0.19712208731451464
u2	0.5845188673926812
u3	-0.2478892029739851
duration	0.03641	0.00082

Not included in ephemeris calculations

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

Filter	Detail	Min	Max
R	Cousins R	561.7 nm	719.7 nm

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

Copy link to this observation

Parameter	Value	Uncertainty
Am1	1.0236	0.0046
Am2	-0.019	0.011
a/R_s	15.367	0.057
R_p/R_s	0.0956	0.0055
ephemeris [JD]	2460140.76979	0.00069
eccentricity	0.0
inclination [degrees]	89.32
omega [degrees]	90.0
orbital period [days]	1.580404341
u0	0.8345468976214033
u1	-0.11324068744181848
u2	0.4925774261878085
u3	-0.2138836290274177
duration	0.03536	0.00022

Included in ephemeris calculations

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

Filter	Detail	Min	Max
R	Cousins R	561.7 nm	719.7 nm

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

Copy link to this observation

Parameter	Value	Uncertainty
Am1	1.0221	0.0051
Am2	-0.016	0.022
a/R_s	15.351	0.058
R_p/R_s	0.1337	0.0071
ephemeris [JD]	2460159.73071	0.00056
eccentricity	0.0
inclination [degrees]	89.32
omega [degrees]	90.0
orbital period [days]	1.580404341
u0	0.8404675809522957
u1	-0.12129024881246894
u2	0.4953509874469895
u3	-0.21452831220551133
duration	0.03666	0.00032