exoclock

GJ1214b (LOW)

Discovered by: Charbonneau et al. 2009

The Star
Simbad
GAIA
2MASS		 G 139-21
DR2 4393265392167891712
J17151894+0457496
RA 17:15:18.9337 DEC +04:57:50.064
Parallax
68.265 mas		 P.M. RA
580.447 mas/y		 P.M. DEC
-749.588 mas/y
MagV
15.1		 MagR
14.394		 MagI
11.52		 MagJ
9.75		 MagH
9.094		 MagK
8.782
MagG
13.009		 MagGBP
14.932		 MagGRP
11.696
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2025
Mid-time
2455913.187407 ± 2e-05 BJDTDB
Period
1.580404595 ± 3.7e-08 days
Transit Parameters
Berta et al. 2012
Rp/Rs
0.116 ± 0.0005		 a/Rs
15.31 +0.21 -0.29
 i
89.3 +0.4 -0.3 deg
e
-		 ω
- deg
DepthR*
18.78 mmag		 Duration*
0.87 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Charbonneau et al. 2009
Teff
3026.0 +130.0 -130.0 K
 Log(g)
4.99 +0.03 -0.03 cm/s2
 Fe/H
0.0 +0.0 -0.0 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 13.24"
Total Observations (Recent) 111 (7)
O-C 0.84 ± 0.12 minutes
ExoClock Observations (Recent) 42 (7)
Space Observations (Recent) 0 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 69 (0)
Kepler Rp/Rs -
TESS Rp/Rs -

GJ1214b


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
GJ1214b (LOW)
2026-07-12		Javier Alonso Santiago
INAF-OACT		Cassegrain 91cm
Moravian C4-1600EC / R / 30.0		0.82 ± 0.24
GJ1214b (LOW)
2026-06-23		Dim Stouraitis
Galilaios		SCT
SXVF-H9 Starlight-Xpress / I / 200.0		-1.43 ± 1.14
GJ1214b (LOW)
2026-06-16		Federico Palaia
Civico Osservatorio Astronomico Rozzano		Meade ACF
Moravian G4-9000 / R / 180.0		1.58 ± 1.11
GJ1214b (LOW)
2026-06-12		Javier Alonso Santiago
INAF-OACT		Cassegrain 91cm
Moravian C4-1600EC / R / 45.0		0.23 ± 0.23
GJ1214b (LOW)
2026-05-17		Pieter Vuylsteke
Marvel (La Palma)		ASA Ritchey
ZWO 6200mm / gpr / 180.0		0.21 ± 1.2
GJ1214b (LOW)
2026-04-28		Alvaro Fornas
Centro Astronómico Alto Turia (CAAT). MPC R48		Planewave CDK 24
Atik One 6 / Lum / 60.0		-0.63 ± 0.5
GJ1214b (LOW)
2025-08-03		Gerard Tartalo
Dark Energy Observatory		Ts RC8" Carbon
Player One Ares M (imx533M) / Clear / 180.0		-2.28 ± 3.6
GJ1214b (LOW)
2025-07-15		samuel Diaz Lopez
Tomas Lopez (AstroCamp)		SCA260
ASI2600MM / rpr / 180.0		1.23 ± 1.27
GJ1214b (LOW)
2025-07-15		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Lum / 120.0		-4.5 ± 2.45
GJ1214b (LOW)
2025-06-27		Javier Alonso Santiago
INAF-OACT		Cassegrain 91cm
Moravian C4-1600EC / I / 40.0		2.25 ± 0.24
GJ1214b (LOW)
2025-06-27		Alvaro Fornas
MPC J57. Centro Astronómico Alto Turia		Planewave CDK 17
QHY600M / Lum / 240.0		1.19 ± 1.31
GJ1214b (LOW)
2025-06-15		Adrian Jones
Private Observatory (I64)		Meade ACF 30cm
QSI 583 / Lum / 200.0		3.4 ± 1.73
GJ1214b (LOW)
2025-05-20		Daniel Kustrin
Alnitak		PlaneWave CDK
Moravian C3-61000 Pro / R / 120.0		0.63 ± 5.62
GJ1214b (LOW)
2024-08-14		Florence Libotte
IAC 80		IAC 80 equatorial german mount
Camelot2 / R / 200.0		3.65 ± 1.44
GJ1214b (LOW)
2024-08-03		Alvaro Fornas
MPC J57. Centro Astronómico Alto Turia		Meade LX200 Classic
Moravian G2 8300 / Lum / 180.0		0.98 ± 2.16
GJ1214b (LOW)
2024-08-03		Mario Morales-Aimar
Observatorio de Sencelles MPC K14		Reflector 10"
SBIG ST7-XME / Clear / 300.0		-1.01 ± 0.78
GJ1214b (LOW)
2024-08-03		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Lum / 120.0		-1.73 ± 0.92
GJ1214b (LOW)
2024-08-03		Dim Stouraitis
Galilaios		SCT
SXVF-H9 Starlight-Xpress / R / 150.0		-3.2 ± 2.3
GJ1214b (LOW)
2024-07-15		Miguel Ángel Álava Amat
Sarriguren		Meade SC 8"
Asi 1600 MM / Lum / 240.0		0.19 ± 2.88
GJ1214b (LOW)
2023-07-27		Mario Morales-Aimar
Observatorio de Sencelles MPC K14		Reflector 10"
SBIG ST7-XME / Clear / 350.0		-0.63 ± 2.02
GJ1214b (LOW)
2023-07-27		Enrique Arce
Vallbona Observatory		Newton 10" f4
Sbig ST7-XME / Clear / 300.0		-1.72 ± 1.24
GJ1214b (LOW)
2023-07-08		Sacha Foschino
Observatoire des Baronnies Provençales		Planewave 430mm
SVO ASI 6200 MM Pro / Clear / 120.0		1.02 ± 0.79
GJ1214b (LOW)
2023-06-12		David Arnot
OSO PIRATE		PlaneWave Instruments CDK24 24 inch (610 mm) f/6.5 Corrected Dall-Kirkham Astrograph
FLI ProLine KAF-16803 / R / 125.0		1.02 ± 1.17
GJ1214b (LOW)
2023-06-01		Yannic Delisle
Buthiers UAI 199		Custome made
QHY268M Pro / R / 60.0		0.48 ± 3.31
GJ1214b (LOW)
2023-05-16		Marcelo Emilio
Pico dos Dias		Boller & Chivens
Ixon 4335 / R / 120.0		0.1 ± 0.36
GJ1214b (LOW)
2023-03-20		Magdalena Szkudlarek
Deep Sky Chile - ROTUZ		PlaneWave CDK 20
QHY268M pro / R / 67.0		3.23 ± 2.3
GJ1214b (LOW)
2022-08-26		Anaël Wünsche
Observatoire des Baronnies Provençales		Astelco
FLIPL230 / Clear / 120.0		1.5 ± 0.43
GJ1214b (LOW)
2022-07-19		Ivo Peretto
MarSEC Marana Space Explorer Center		R-C
Moravia G2-1600 MkII / Clear / 180.0		0.21 ± 0.86
GJ1214b (LOW)
2022-07-12		David Arnot
OSO PIRATE		PlaneWave Instruments CDK24 24 inch (610 mm) f/6.5 Corrected Dall-Kirkham Astrograph
FLI ProLine KAF-16803 / R / 100.0		2.84 ± 1.58
GJ1214b (LOW)
2022-06-12		Adrian Jones
Private Observatory (I64)		Meade ACF 30cm
QSI 583 / Lum / 200.0		-1.07 ± 1.87
GJ1214b (LOW)
2022-05-20		Dim Stouraitis
Galilaios		SCT
SXVF-H9 Starlight-Xpress / R / 100.0		1.47 ± 2.74
GJ1214b (LOW)
2022-05-12		Robert Roth
TURMX Observatory		Planewave CDK17
QHY600M / Lum / 120.0		2.23 ± 0.86
GJ1214b (LOW)
2022-05-05		David Arnot
OSO PIRATE		PlaneWave Instruments CDK24 24 inch (610 mm) f/6.5 Corrected Dall-Kirkham Astrograph
FLI ProLine KAF-16803 / R / 100.0		-0.3 ± 0.84
GJ1214b (LOW)
2021-06-30		Adam Popowicz
Otivar dome2		Newton 12" ASA
ASI ZWO 1600MM / R / 400.0		-1.63 ± 4.32
GJ1214b (LOW)
2021-06-11		Mario Morales-Aimar
Observatorio de Sencelles MPC K14		Reflector 10"
SBIG ST7-XME / Clear / 240.0		2.48 ± 1.58
GJ1214b (LOW)
2021-03-23		Paul Benni
Acton Sky Portal		C11 EdgeHD
SBIG ST8XME / AstrodonExoPlanet-BB / 100.0		2.1 ± 0.43
GJ1214b (LOW)
2020-08-03		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Clear / 120.0		3.07 ± 1.01
GJ1214b (LOW)
2020-05-15		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / Clear / 180.0		0.09 ± 1.3
GJ1214b (LOW)
2019-09-29		Xesco Rubia
Stupa Observatory		TOA130NFB
Moravian G4-16000 MKII / Lum / 180.0		3.06 ± 3.17
GJ1214b (LOW)
2018-07-07		Anaël Wünsche
Observatoire des Baronnies Provençales		Astelco
FLIPL230 / Lum / 60.0		0.48 ± 0.43
GJ1214b (LOW)
2015-07-19		Antonio Marino
UAN c/o INAF-Osservatorio Astronomico di Capodimonte, Naples ITALY		SC11
CCD Atik 314L / Clear / 90.0		0.7 ± 3.02
GJ1214b (LOW)
2015-06-04		Ramon Naves
Montcabrer		Meade LX200 12" ACF
Sbig ST8xme / Clear / 180.0		-1.85 ± 2.02

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2017-07-28 Mallonn et al. 2019 0.11 ± 0.3
2017-06-30 Mallonn et al. 2019 0.07 ± 0.2
2017-06-22 Mallonn et al. 2019 -0.13 ± 0.36
2017-06-18 Mallonn et al. 2019 0.03 ± 0.22
2017-06-18 Mallonn et al. 2019 -0.48 ± 0.13
2017-06-17 Mallonn et al. 2019 0.13 ± 0.35
2017-06-11 Mallonn et al. 2019 -0.04 ± 0.35
2017-06-07 Mallonn et al. 2019 0.12 ± 0.3
2017-06-07 Mallonn et al. 2019 -0.17 ± 0.32
2017-06-01 Mallonn et al. 2019 -0.45 ± 0.26
2017-05-30 Mallonn et al. 2019 -0.15 ± 0.22
2017-05-23 Mallonn et al. 2019 -0.08 ± 0.17
2017-05-19 Mallonn et al. 2019 0.35 ± 0.35
2017-05-19 Mallonn et al. 2019 -0.02 ± 0.24
2017-05-19 Mallonn et al. 2019 -0.32 ± 0.33
2017-05-05 Mallonn et al. 2019 -0.18 ± 0.29
2017-05-04 Mallonn et al. 2019 -0.06 ± 0.23
2017-04-23 Mallonn et al. 2019 0.45 ± 0.29
2017-04-23 Mallonn et al. 2019 -0.1 ± 0.17
2017-04-18 Mallonn et al. 2019 -0.67 ± 0.6
2017-04-04 Mallonn et al. 2019 0.53 ± 0.29
2017-04-04 Mallonn et al. 2019 -0.19 ± 0.23
2017-03-27 Mallonn et al. 2019 0.03 ± 0.16
2011-11-08 Fraine et al. 2013 -0.15 ± 0.09
2011-11-06 Fraine et al. 2013 -0.24 ± 0.14
2011-08-25 Harpsøe et al. 2013 0.6 ± 0.39
2011-08-25 Harpsøe et al. 2013 0.26 ± 0.39
2011-08-25 Harpsøe et al. 2013 -0.69 ± 0.72
2011-08-10 Cáceres et al. 2014 0.99 ± 0.35
2011-06-14 Cáceres et al. 2014 1.92 ± 1.44
2011-06-03 Harpsøe et al. 2013 0.28 ± 0.24
2011-05-19 Fraine et al. 2013 -0.04 ± 0.08
2011-05-18 Cáceres et al. 2014 2.65 ± 1.35
2011-05-18 Fraine et al. 2013 -0.34 ± 0.1
2011-05-16 Fraine et al. 2013 -0.18 ± 0.07
2011-05-15 Fraine et al. 2013 -0.06 ± 0.11
2011-05-12 Fraine et al. 2013 0.02 ± 0.08
2011-05-10 Fraine et al. 2013 0.04 ± 0.1
2011-05-08 Fraine et al. 2013 0.04 ± 0.07
2011-05-07 Fraine et al. 2013 -0.11 ± 0.14
2011-05-05 Fraine et al. 2013 0.12 ± 0.09
2011-05-04 Fraine et al. 2013 -0.01 ± 0.07
2011-05-02 Fraine et al. 2013 -0.06 ± 0.08
2011-04-30 Fraine et al. 2013 -0.09 ± 0.1
2011-04-29 Fraine et al. 2013 -0.12 ± 0.08
2011-04-26 Fraine et al. 2013 -0.35 ± 0.24
2011-04-18 Fraine et al. 2013 0.17 ± 0.16
2011-03-30 Fraine et al. 2013 -0.3 ± 0.22
2011-03-11 Fraine et al. 2013 0.38 ± 0.13
2010-08-21 Harpsøe et al. 2013 0.13 ± 0.23
2010-08-06 Harpsøe et al. 2013 0.2 ± 0.26
2010-08-02 Harpsøe et al. 2013 0.22 ± 0.14
2010-07-18 Harpsøe et al. 2013 0.43 ± 0.29
2010-07-14 Harpsøe et al. 2013 0.2 ± 0.23
2010-07-07 Harpsøe et al. 2013 -0.23 ± 0.88
2010-07-06 Harpsøe et al. 2013 -0.34 ± 0.23
2010-06-29 Harpsøe et al. 2013 1.74 ± 0.6
2010-05-18 Berta et al. 2011 0.01 ± 0.1
2010-05-10 Berta et al. 2011 0.14 ± 0.16
2010-04-29 Cáceres et al. 2014 1.51 ± 0.16
2010-04-29 Harpsøe et al. 2013 0.84 ± 0.95
2010-04-29 Harpsøe et al. 2013 0.72 ± 1.34
2010-04-27 Fraine et al. 2013 0.07 ± 0.12
2010-04-26 Fraine et al. 2013 0.09 ± 0.1
2009-06-17 Berta et al. 2011 -0.15 ± 0.22
2009-06-01 Berta et al. 2011 0.01 ± 0.13
2009-05-29 Berta et al. 2011 -0.02 ± 0.15
2009-05-15 Berta et al. 2011 0.22 ± 0.51
2009-05-15 Berta et al. 2011 -0.02 ± 0.09
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