exoclock

KELT-7b

Discovered by: Bieryla et al. 2015

The Star
Simbad
GAIA
2MASS		 HD 33643
DR2 181908842994567936
J05131092+3319054
RA 05:13:10.9287 DEC +33:19:05.403
Parallax
7.288 mas		 P.M. RA
10.622 mas/y		 P.M. DEC
-49.779 mas/y
MagV
8.54		 MagR*
8.279		 MagI
8.129		 MagJ
7.739		 MagH
7.58		 MagK
7.543
MagG
8.452		 MagGBP
8.688		 MagGRP
8.113
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2021
Mid-time
2458343.40408 ± 0.0001 BJDTDB
Period
2.7347657 ± 4e-07 days
Transit Parameters
Bieryla et al. 2015
Rp/Rs
0.091 ± 0.0006		 a/Rs**
5.53 +0.04 -0.04
 i
83.8 +0.4 -0.4 deg
e
-		 ω
- deg
DepthR*
9.83 mmag		 Duration*
3.49 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted to produce a duration that matches the observations.

Limb Darkening Parameters
Bieryla et al. 2015
Teff
6789.0 +50.0 -49.0 K
 Log(g)
4.15 +0.02 -0.02 cm/s2
 Fe/H
0.14 +0.07 -0.08 dex
ExoClock Status
Observing Priority
ExoClock Observations (Recent)
Space Observations
Literature Mid-times
ETD Observations
O-C minutes 		LOW
8 (3)

13

1.6±0.5

KELT-7b


ExoClock Observations

Observation
Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
2022-02-01 Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		 Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 30.0		 2.2 ± 1.9
2022-01-10 Dominique DANIEL
La Montjoie		 Celestron CGX C8 XLT
Camera CMOS ZWO ASI294MC pro (color) / Clear / 60.0		 2.0 ± 2.7
2021-11-09 Tõnis Eenmäe
Tartu Observatory		 Planewave CDK 12.5
Apogee Alta U42 / B / 20.0		 1.8 ± 1.6
2020-12-15 Martin Crow
Burnham Observatory		 Celestron C9.25
SX694 mono / R / 4.0		 6.1 ± 5.8 - Data available
2020-11-24 Anaël Wünsche
Observatoire des Baronnies Provençales		 CDK Planewave
SBIG STL11K / R / 30.0		 0.4 ± 0.9 - Data available
2020-11-13 Alessandro Nastasi
Galhassin Robotic Telescope 1 (GRT1)		 Officina Stellare RiLa 400
FLI ProLine 16803 / z' / 30.0		 2.2 ± 1.4 - Data available
2019-12-31 Claudio Lopresti
Claudio Lopresti		 Mak-Newton
CCD Sbig ST10xme / I / 240.0		 0.1 ± 1.4 - Data available
2019-01-15 Giuseppe Conzo
Gruppo Astrofili Palidoro		 Skywatcher 80ED
ASI-178MM / Clear / 90.0		 4.0 ± 1.3


Literature Mid-times

Observation
Date		 Mid-time Time format Reference O-C
minutes
2017-10-18 2458045.316888 ± 0.000627 BJD_TDB Pluriel et al. 2020 3.3 ± 0.9
2017-01-04 2457758.16446 ± 0.00019 BJD_TDB Garhart et al. 2020 0.3 ± 0.3
2016-12-27 2457749.95953 ± 0.00016 BJD_TDB Garhart et al. 2020 -0.6 ± 0.2
2014-01-23 2456680.667558 ± 0.001 BJD_TDB Bieryla et al. 2015 2.1 ± 1.4
2013-10-19 2456584.950978 ± 0.00054 BJD_TDB Bieryla et al. 2015 1.8 ± 0.8
2013-01-29 2456322.413721 ± 0.00068 BJD_TDB Bieryla et al. 2015 2.1 ± 1.0
2013-01-27 2456319.678871 ± 0.00068 BJD_TDB Bieryla et al. 2015 2.0 ± 1.0
2012-12-08 2456270.451621 ± 0.00064 BJD_TDB Bieryla et al. 2015 -0.1 ± 0.9
2012-11-22 2456254.045118 ± 0.00073 BJD_TDB Bieryla et al. 2015 2.9 ± 1.1
2012-11-14 2456245.839584 ± 0.00058 BJD_TDB Bieryla et al. 2015 1.1 ± 0.8
2012-11-03 2456234.898861 ± 0.00049 BJD_TDB Bieryla et al. 2015 -1.2 ± 0.7
2012-10-23 2456223.95947 ± 0.00036 BJD_TDB Bieryla et al. 2015 -1.7 ± 0.5
2012-10-04 2456204.817057 ± 0.00074 BJD_TDB Bieryla et al. 2015 -0.3 ± 1.1
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