Planet Kepler-21 Ab

Detailed information about planet Kepler-21 Ab and its parameters.

Planet

Name
Kepler-21 Ab
Planet Status
Confirmed
Discovered in
2012
Update
2024-08-07
Mass
Mass*sin(i)
Semi-Major Axis
Orbital Period
Eccentricity
ω
Tperi
Radius
Inclination
Detection Method
Primary Transit
Mass Meas. Method
Radial Velocity
Radius Meas. Method
Primary Transit
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-21 b, KOI-975 b, WISE J190926.86+384250.7 b, HD 179070 Ab, K00975.0, KIC 3632418 b, HD 179070 b, HIP 94112 b, BD+38 3455 b, SAO 67891 b, TIC 121214185 b, TYC 3120-00963-1 b, 2MASS J19092683+3842505 b
Data Source Type Result Value Result Figure Notes Reference
Molecule Data Source Type Result Value Result Figure Notes Reference

See also Planets in Binaries webpage.

No link

Star

Name
Kepler-21 A
Distance
Spectral type
F6IV
Apparent magnitude V
8.27
Mass
Age
Effective temperature
Radius
Metallicity [Fe/H]
Detected Disc
Magnetic Field
RA2000
19:09:26.8
Dec2000
+38:42:50.5
Alternate Names
Kepler-21, BD+38 3455, WISE J190926.86+384250.7, HD 179070, HIP 94112, KOI-975, KIC 3632418, SAO 67891, TIC 121214185, TYC 3120-00963-1, 2MASS J19092683+3842505

Ginski et al. (2012) detect a comoving M dwarf companion star 0.756 arcseconds away (81.6 to 87 AUs at 108 pc). Furlan et al. (2017) report a way fainter additional companion 1.084 arcseconds away (117 AUs at 108 pc). Estimated luminosity for this latter object seems compatible with either a very low-mass M dwarf star or an L-type brown dwarf.

No link