exoclock

HD2685b (LOW)

Discovered by: Jones et al. 2019

The Star
Simbad
GAIA
2MASS		 HD 2685
DR2 4684205720883329920
J00291894-7618146
RA 00:29:18.9527 DEC -76:18:14.623
Parallax
5.051 mas		 P.M. RA
-2.97 mas/y		 P.M. DEC
6.961 mas/y
MagV
9.59		 MagR*
9.348		 MagI*
9.094		 MagJ
8.825		 MagH
8.651		 MagK
8.595
MagG
9.52		 MagGBP
9.752		 MagGRP
9.18
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2025
Mid-time
2459171.799188 ± 6.6e-05 BJDTDB
Period
4.12690466 ± 3.8e-07 days
Transit Parameters
Jones et al. 2019
Rp/Rs
0.09467 ± 0.00033		 a/Rs
7.697 +0.069 -0.054
 i
89.25 +0.41 -0.44 deg
e
0.091 +0.039 -0.047
 ω
184.36 +6.27 -6.56 deg
DepthR*
11.66 mmag		 Duration*
4.49 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Jones et al. 2019
Teff
6801.0 +76.0 -76.0 K
 Log(g)
4.21 +0.03 -0.03 cm/s2
 Fe/H
0.02 +0.06 -0.06 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 5.0"
Total Observations (Recent) 34 (3)
O-C -0.52 ± 1.16 minutes
ExoClock Observations (Recent) 6 (3)
Space Observations (Recent) 25 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 3 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.09303 ± 0.0001

HD2685b


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
HD2685b (LOW)
2025-11-12		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 30.0		-5.53 ± 3.02
HD2685b (LOW)
2025-07-07		Jean-Charles Ripault
HRT Observatory		Astrosib RC360
Moravian C3-61000 / R / 60.0		2.59 ± 2.74
HD2685b (LOW)
2025-07-03		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 20.0		-3.59 ± 2.16
HD2685b (LOW)
2023-11-25		Francois Regembal
HRT Deep Sky Chile		Astrosib RC360
Moravian C3 PRO 61000 / Lum / 75.0		2.26 ± 1.87
HD2685b (LOW)
2022-11-02		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 60.0		-1.14 ± 2.45
HD2685b (LOW)
2022-10-29		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 20.0		-3.87 ± 3.31

Space Observations
Planet
Observation Date		 Mission O-C
minutes
HD2685b (LOW)
2023-08-22		TESS-0.25 ± 0.45
HD2685b (LOW)
2023-08-18		TESS0.94 ± 0.49
HD2685b (LOW)
2023-08-14		TESS-0.7 ± 0.37
HD2685b (LOW)
2023-08-05		TESS-0.11 ± 0.42
HD2685b (LOW)
2023-08-01		TESS-0.05 ± 0.42
HD2685b (LOW)
2023-07-24		TESS-0.06 ± 0.42
HD2685b (LOW)
2023-07-20		TESS0.9 ± 0.4
HD2685b (LOW)
2023-07-16		TESS-0.93 ± 0.39
HD2685b (LOW)
2023-07-03		TESS0.56 ± 0.42
HD2685b (LOW)
2020-08-23		TESS-0.53 ± 0.43
HD2685b (LOW)
2020-08-19		TESS-1.25 ± 0.43
HD2685b (LOW)
2020-08-15		TESS0.66 ± 0.4
HD2685b (LOW)
2020-08-07		TESS-0.13 ± 0.46
HD2685b (LOW)
2020-08-02		TESS0.28 ± 0.39
HD2685b (LOW)
2020-07-29		TESS0.24 ± 0.5
HD2685b (LOW)
2020-07-25		TESS0.61 ± 0.45
HD2685b (LOW)
2020-07-21		TESS0.08 ± 0.46
HD2685b (LOW)
2020-07-13		TESS0.8 ± 0.45
HD2685b (LOW)
2018-08-20		TESS0.04 ± 0.39
HD2685b (LOW)
2018-08-15		TESS-0.74 ± 0.37
HD2685b (LOW)
2018-08-11		TESS0.42 ± 0.36
HD2685b (LOW)
2018-08-07		TESS0.12 ± 0.39
HD2685b (LOW)
2018-08-03		TESS-0.03 ± 0.4
HD2685b (LOW)
2018-07-30		TESS-0.01 ± 0.42
HD2685b (LOW)
2018-07-26		TESS-0.02 ± 0.39

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2018-08-03 Maciejewski 2022 0.13 ± 0.58
2018-07-30 Maciejewski 2022 -0.55 ± 0.59
2018-07-26 Maciejewski 2022 0.04 ± 0.56
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