exoclock

K2-238b (LOW)

Discovered by: Soto et al. 2018

The Star
Simbad
GAIA
2MASS
K2-238
DR2 2631270757088861312
J23104905-0751270
RA 23:10:49.0455 DEC -07:51:27.077
Parallax
0.148 mas
P.M. RA
-9.24 mas/y
P.M. DEC
-8.726 mas/y
MagV
13.75
MagR
13.89
MagI*
12.938
MagJ
12.464
MagH
12.095
MagK
12.032
MagG
13.664
MagGBP
14.029
MagGRP
13.089
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2022
Mid-time
2457984.06074 ± 0.00023 BJDTDB
Period
3.2046909 ± 2.2e-06 days

Transit Parameters
Soto et al. 2018
Rp/Rs
0.08 ± 0.003
a/Rs
6.3 +0.7 -0.5
i
84.5 +1.8 -1.5 deg
e
-
ω
- deg
DepthR*
7.66 mmag
Duration*
3.51 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Soto et al. 2018
Teff
5630.0 +78.0 -78.0 K
Log(g)
4.11 +0.07 -0.07 cm/s2
Fe/H
0.34 +0.04 -0.04 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 17.71"
Total Observations (Recent) 13 (3)
O-C -5.99 ± 2.54 minutes
ExoClock Observations (Recent) 4 (3)
Space Observations (Recent) 9 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 0 (0)
Kepler Rp/Rs 0.08387 ± 0.00046
TESS Rp/Rs 0.0867 ± 0.0045

K2-238b


ExoClock Observations

Planet
Observation Date
Observer
Observatory
Telescope
Camera / Filter / Exp [s]
O-C
minutes
K2-238b (LOW)
2022-10-15
Adam Popowicz
Otivar dome2
Newton 12" ASA
ASI ZWO 1600MM / R / 240.0
-12.51 ± 7.63
K2-238b (LOW)
2022-09-04
Jean-Pascal Vignes
Deep Sky Chile
Planewave CDK400
QHYCCD 600M / Lum / 120.0
-14.41 ± 4.32
K2-238b (LOW)
2022-08-19
Yves Jongen
Deep Sky Chile
Plane Wave CDK 17"
Moravian 4G / Lum / 180.0
2.08 ± 5.76
K2-238b (LOW)
2020-09-19
Taewoo Kim
Deokheung Optical Astronomy Observatory
NYSC 1m Telescope
FLI PL-16803 or PI SOPHIA-2048B / R / 180.0
-5.67 ± 5.76

Space Observations

Planet
Observation Date
Mission O-C
minutes
K2-238b (LOW)
2021-09-10
TESS-1.48 ± 6.48
K2-238b (LOW)
2021-09-07
TESS-6.39 ± 7.63
K2-238b (LOW)
2021-08-22
TESS11.55 ± 8.93
K2-238b (LOW)
2018-09-13
K20.26 ± 0.76
K2-238b (LOW)
2017-02-10
K23.06 ± 2.3
K2-238b (LOW)
2017-01-12
K2-0.37 ± 1.58
K2-238b (LOW)
2016-12-27
K20.33 ± 1.15
K2-238b (LOW)
2016-12-24
K2-0.38 ± 0.75
K2-238b (LOW)
2016-12-18
K2-0.62 ± 2.02
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