Planet HAT-P-7 Ac

Detailed information about planet HAT-P-7 Ac and its parameters.

Planet

Name
HAT-P-7 Ac
Planet Status
Retracted
Discovered in
2013
Publication
Status
Published in a refereed paper
Update
2025-05-14
Mass
Mass*sin(i)
Semi-Major Axis
Orbital Period
Eccentricity
Angular distance
ω
Tperi
Radius
Inclination
Detection Method
Radial Velocity
Mass Meas. Method
Radial Velocity
Radius Meas. Method
Primary transit
Secondary transit
λ
Impact Parameter b
Time Vr=0
Velocity Semiamplitude K
Calculated temperature
Measured temperature
Hottest point longitude
Geometric albedo
Surface gravity log(g/gH)
Alternate Names
Kepler-2 c
Data Source Type Result Value Result Figure Notes Reference
Molecule Data Source Type Result Value Result Figure Notes Reference

Yang et al. (2025) detect a stellar companion whose eccentric orbit (a = 32 AUs, e = 0.76) would disrupt any object within 3 AUs. Hence the candidate third body reported by Knutson et al. (2014) actually matches with aforementioned companion star.

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Star

Name
HAT-P-7 A
Distance
Spectral type
F5IV
Apparent magnitude V
10.5
Apparent magnitude I
Apparent magnitude J
Apparent magnitude H
Apparent magnitude K
Mass
Age
Effective temperature
Radius
Metallicity [Fe/H]
Detected Disc
Magnetic Field
RA2000
19:28:59.0
Dec2000
+47:58:10.0
Alternate Names
Kepler-2, KOI-2, BD+47 2846, TOI-1265

An M dwarf companion star (HAT-P-7 B) lies 1286 AUs away whereas a third companion star (HAT-P-7 C, mC sin i = 0.19 MSol) is detected through radial velocity and characterized by highly eccentric orbit (a = 32 AUs, e = 0.76) (cfr. Ngo et al. 2015, Michel & Mugrauer 2024, Yang et al. 2025).

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