exoclock

K2-261b (HIGH)

Discovered by: Johnson et al. 2018

The Star
Simbad
GAIA
2MASS		 BD+01 2494
DR2 3807826337147474176
J10520778+0029359
RA 10:52:07.7793 DEC +00:29:36.085
Parallax
4.66 mas		 P.M. RA
-23.664 mas/y		 P.M. DEC
-44.171 mas/y
MagV
10.64		 MagR
10.52		 MagI
9.88		 MagJ
9.337		 MagH
8.92		 MagK
8.89
MagG
10.459		 MagGBP
10.872		 MagGRP
9.917
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2025
Mid-time
2458558.31593 ± 0.00025 BJDTDB
Period
11.6334724 ± 3.4e-06 days
Transit Parameters
Johnson et al. 2018
Rp/Rs
0.0529 ± 0.001		 a/Rs
13.3 +2.4 -2.6
 i
88.4 +1.1 -1.9 deg
e
0.39 +0.15 -0.15
 ω
143.0 +18.0 -18.0 deg
DepthR*
3.7 mmag		 Duration*
5.1 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Johnson et al. 2018
Teff
5537.0 +71.0 -71.0 K
 Log(g)
4.21 +0.11 -0.11 cm/s2
 Fe/H
0.36 +0.06 -0.06 dex
ExoClock Status
Observing Priority HIGH
Minimum aperture 12.2"
Total Observations (Recent) 14 (0)
O-C -
ExoClock Observations (Recent) 0 (0)
Space Observations (Recent) 14 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 0 (0)
Kepler Rp/Rs 0.05255 ± 0.00022
TESS Rp/Rs 0.05242 ± 0.00041

K2-261b


Space Observations
Planet
Observation Date		 Mission O-C
minutes
K2-261b (HIGH)
2023-12-01		TESS2.24 ± 1.58
K2-261b (HIGH)
2023-11-19		TESS0.04 ± 1.44
K2-261b (HIGH)
2021-12-21		TESS-1.34 ± 1.73
K2-261b (HIGH)
2021-12-10		TESS1.21 ± 1.73
K2-261b (HIGH)
2021-11-28		TESS-2.42 ± 2.02
K2-261b (HIGH)
2021-11-17		TESS-0.74 ± 1.87
K2-261b (HIGH)
2021-02-10		TESS-1.69 ± 1.87
K2-261b (HIGH)
2019-03-15		TESS0.53 ± 1.58
K2-261b (HIGH)
2019-03-04		TESS-2.1 ± 2.16
K2-261b (HIGH)
2017-07-18		K20.5 ± 0.88
K2-261b (HIGH)
2017-07-07		K2-2.58 ± 2.3
K2-261b (HIGH)
2017-06-25		K2-4.06 ± 1.87
K2-261b (HIGH)
2017-06-13		K20.55 ± 0.6
K2-261b (HIGH)
2017-06-02		K21.91 ± 4.32
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