exoclock

K2-121b

Discovered by: Dressing et al. 2017

The Star
Simbad
GAIA
2MASS		 K2-121
DR2 662078902422542336
J08274481+1734457
RA 08:27:44.8140 DEC +17:34:45.804
Parallax
5.875 mas		 P.M. RA
-13.87 mas/y		 P.M. DEC
-14.712 mas/y
MagV
13.32		 MagR
12.98		 MagI*
12.121		 MagJ
11.309		 MagH
10.742		 MagK
10.616
MagG
12.925		 MagGBP
13.552		 MagGRP
12.189
*Calculated from GAIA magnitudes.

Ephemeris - Not verified False
Mayo et al. 2018
Mid-time
2457143.56126 ± 0.0001 BJDTDB
Period
5.185759 ± 1.4e-05 days
Transit Parameters
Dressing et al. 2017
Rp/Rs
0.109 ± 0.005		 a/Rs**
14.46 +0.16 -0.12
 i
87.2 +0.9 -0.5 deg
e
0.22 +0.19 -0.18
 ω
73.0 +64.9 -104.5 deg
DepthR*
14.93 mmag		 Duration*
2.12 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted to produce a duration that matches the observations.

Limb Darkening Parameters
Dressing et al. 2017
Teff
4471.4 +111.6 -103.6 K
 Log(g)
4.52 +0.06 -0.06 cm/s2
 Fe/H
0.0 +0.0 -0.0 dex
ExoClock Status
Observing Priority
ExoClock Observations (Recent)
Space Observations
Literature Mid-times
ETD Observations
O-C minutes 		HIGH
13 (10)

0

-3.5±0.4

K2-121b


ExoClock Observations

Observation
Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
2022-02-11 Dominique DANIEL
La Montjoie		 Celestron CGX C8 XLT
Camera CMOS ZWO ASI294MC pro (color) / Clear / 235.0		 -0.1 ± 4.3
2022-02-11 Yves Jongen
Rasteau Observatory		 Plane Wave CDK 17"
FLI Kepler CMOS 4040 / Lum / 120.0		 -4.3 ± 1.6
2022-02-06 Taewoo Kim
Deokheung Optical Astronomy Observatory		 NYSC 1m Telescope
FLI PL-16803 or PI SOPHIA-2048B / R / 120.0		 -4.6 ± 0.9
2022-01-22 Yves Jongen
Rasteau Observatory		 Plane Wave CDK 17"
FLI Kepler CMOS 4040 / Lum / 120.0		 -2.5 ± 1.2
2022-01-22 Robert Roth
TURMX Observatory		 Planewave CDK17
QHY600M / r' / 120.0		 -4.6 ± 1.3
2022-01-22 Jean-Bernard Pioppa
La Roque-Esclapon		 KEPLER
ATIK 383 L+ / R / 300.0		 -8.0 ± 2.3
2022-01-16 Cyrille Aumasson
observatory of Baronnies Provençales		 ASTELCO 31.5"
FLI PL230 / R / 120.0		 -0.5 ± 1.6
2022-01-16 Aziz Ettahar Kaeouach
High Atlas Observatory		 PlaneWave CDK 12.5
Zwo asi 294 mm pro / R / 120.0		 -2.8 ± 3.2
2022-01-16 Enrique Arce
Vallbona Observatory		 Newton 10" f4
Sbig ST7-XME / Clear / 90.0		 -3.6 ± 2.0
2022-01-16 Robert Roth
TURMX Observatory		 Planewave CDK17
QHY600M / r' / 60.0		 -4.4 ± 1.3
2021-03-16 John Savage
Z42 Rushay Farm Observatory		 Celestron 14Edge FR
ZWO ASI6200MM / r' / 120.0		 -0.1 ± 1.7
2021-02-13 Manfred Raetz
privat observatory Herges-Hallenberg		 SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / Clear / 120.0		 -3.8 ± 0.9
2019-02-24 Lorenzo Betti
Osservatorio Polifunzionale del Chianti		 Ritchey-Chretien
Moravian G2 - KAF1603ME / Astrodon ExoPlanet-BB / 120.0		 -1.2 ± 1.7
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