exoclock

KELT-12b (HIGH)

Discovered by: Stevens et al. 2017

The Star
Simbad
GAIA
2MASS
BD+36 2955
DR2 4608935250790855296
J17503372+3634128
RA 17:50:33.7179 DEC +36:34:12.803
Parallax
2.688 mas
P.M. RA
-0.136 mas/y
P.M. DEC
-10.962 mas/y
MagV
10.59
MagR*
10.287
MagI
9.998
MagJ
9.631
MagH
9.385
MagK
9.362
MagG
10.484
MagGBP
10.764
MagGRP
10.076
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2025
Mid-time
2459191.91458 ± 0.00022 BJDTDB
Period
5.0316323 ± 1.9e-06 days

Transit Parameters
Stevens et al. 2017
Rp/Rs
0.0772 ± 0.0019
a/Rs
6.1 +0.4 -0.4
i
84.5 +1.1 -0.9 deg
e
-
ω
- deg
DepthR*
7.15 mmag
Duration*
5.75 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Stevens et al. 2017
Teff
6279.0 +51.0 -51.0 K
Log(g)
3.89 +0.05 -0.05 cm/s2
Fe/H
0.19 +0.08 -0.09 dex
ExoClock Status
Observing Priority HIGH
Minimum aperture 5.91"
Total Observations (Recent) 24 (3)
O-C 5.07 ± 1.97 minutes
ExoClock Observations (Recent) 4 (3)
Space Observations (Recent) 19 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 1 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.07146 ± 0.00025

KELT-12b


ExoClock Observations

Planet
Observation Date
Observer
Observatory
Telescope
Camera / Filter / Exp [s]
O-C
minutes
KELT-12b (HIGH)
2025-07-21
Mark van der Grijp
Raspay Observatory
C9.25 HD
ZWO2600 MM Pro / R / 90.0
3.46 ± 5.04
KELT-12b (HIGH)
2025-07-21
Arushi Nath
Arushi Nath
12" Ritchey- Chretien Pro
ASI 2600 Mono Camera / R / 180.0
2.74 ± 3.02
KELT-12b (HIGH)
2025-07-15
Joan Miquel González Navarra
Sabadell Observatory
0.5m Newton
Moravian G2-1600 / R / 40.0
7.97 ± 3.02
KELT-12b (HIGH)
2022-07-05
David Arnot
OSO PIRATE
PlaneWave Instruments CDK24 24 inch (610 mm) f/6.5 Corrected Dall-Kirkham Astrograph
FLI ProLine KAF-16803 / R / 35.0
-4.12 ± 2.3

Space Observations

Planet
Observation Date
Mission O-C
minutes
KELT-12b (HIGH)
2022-07-05
TESS1.06 ± 1.44
KELT-12b (HIGH)
2022-06-29
TESS1.48 ± 1.34
KELT-12b (HIGH)
2022-06-24
TESS-0.73 ± 1.31
KELT-12b (HIGH)
2022-06-14
TESS-1.34 ± 1.38
KELT-12b (HIGH)
2021-07-22
TESS-1.76 ± 1.28
KELT-12b (HIGH)
2021-07-17
TESS0.57 ± 1.58
KELT-12b (HIGH)
2021-07-12
TESS1.73 ± 1.32
KELT-12b (HIGH)
2021-07-07
TESS-1.2 ± 1.44
KELT-12b (HIGH)
2021-07-02
TESS0.74 ± 1.32
KELT-12b (HIGH)
2021-06-27
TESS0.17 ± 1.35
KELT-12b (HIGH)
2020-06-30
TESS-2.08 ± 1.73
KELT-12b (HIGH)
2020-06-25
TESS0.27 ± 1.58
KELT-12b (HIGH)
2020-06-20
TESS-1.56 ± 1.44
KELT-12b (HIGH)
2020-06-15
TESS0.94 ± 1.73
KELT-12b (HIGH)
2020-06-10
TESS-1.32 ± 1.44
KELT-12b (HIGH)
2020-06-05
TESS0.8 ± 1.35
KELT-12b (HIGH)
2020-05-31
TESS2.82 ± 1.34
KELT-12b (HIGH)
2020-05-21
TESS1.62 ± 1.44
KELT-12b (HIGH)
2020-05-16
TESS-1.09 ± 1.73

Literature Mid-times

Planet
Observation Date
Reference O-C
minutes
2015-03-02 Stevens et al. 2017 -0.27 ± 1.29
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