Planet HD 8291 b

Detailed information about planet HD 8291 b and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name
HD 8291 b
Planet Status
Confirmed
Discovered in
2014
Update
2024-08-24
Mass
74.6 ( +6.1 -29.0 ) MJ
Mass*sin(i)
—
Semi-Major Axis
2570.0 AU
Orbital Period
—
Eccentricity
—
ω
—
Tperi
—
Radius
—
Inclination
—
Detection Method
Imaging, Astrometry
Mass Meas. Method
Astrometry
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
HIP 6407 b, DEA 38 b
Data Source Type Result Value Result Figure Notes Reference
Molecule Data Source Type Result Value Result Figure Notes Reference

The brown dwarf lies 44.67 arcseconds away from the host star (2247 AUs at 50.3 pc) and is itself binary with separation of about 7.4 AUs (spT L1.0 ± 0.5 and T3 ± 1). Deacon et al. (2014) inferred a total mass of 0.16 MSol for the subsystem but Braig et al. (2024) derive a mass for the primary component that is lower than 0.08 MSol (assuming an equal-mass binary), hence the total mass has to be calculated again. However the mass of secondary component is unknown to date.

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Star

Name
HD 8291
Distance
50.3121 ( ± 0.3577 ) pc
Spectral type
G2V
Apparent magnitude V
9.1
Mass
1.03 ( ± 0.127 ) MSun
Age
0.89 ( +1.3 -0.69 ) Gyr
Effective temperature
5768.0 ( ± 103.234 ) K
Radius
0.89 ( ± 0.037 ) RSun
Metallicity [Fe/H]
-0.0717 ( ± 0.0056 )
Detected Disc
—
Magnetic Field
—
RA2000
01:22:18.7
Dec2000
+03:30:47.3
Alternate Names
HIP 6407, DEA 38

Part of a multiple system including a brown dwarf binary (spT L1.0 ± 0.5 and T3 ± 1) 44.67 arcseconds away (2247 AUs at 50.3 pc) whose components are separated by 7.4 AUs.

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