Planet 21 Her (AB) b

Detailed information about planet 21 Her (AB) b and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name
21 Her (AB) b
Planet Status
Candidate
Discovered in
2002
Update
2018-12-12
Mass
36.0 MJ
Mass*sin(i)
36.0 MJ
Semi-Major Axis
0.48 AU
Orbital Period
57.67 ( ± 2.2 ) day
Eccentricity
—
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
580.0 m/s
Calculated temperature
—
Measured temperature
—
Hottest point longitude
—
Geometric albedo
—
Surface gravity log(g/gH)
—
Alternate Names
o Her b, HD 147869 b, 21 Her b
Data Source Type Result Value Result Figure Notes Reference
Molecule Data Source Type Result Value Result Figure Notes Reference

It is a brown dwarf candidate.

No link

Star

Name
21 Her (AB)
Distance
113.45 ( ± 1.15 ) pc
Spectral type
A+M
Apparent magnitude V
5.82
Mass
4.4 MSun
Age
—
Effective temperature
9500.0 K
Radius
—
Metallicity [Fe/H]
—
Detected Disc
—
Magnetic Field
—
RA2000
16:24:10.8
Dec2000
+06:56:53.6
Alternate Names
o Her, HD 147869, 21 Her

This is an evolved spectrospic binary (A+M) potentially surrounded by a brown dwarf. The mass given is the total mass of the primary (~4 solar masses) and the secondary (~0.4 solar masses)

No link