HD 38858
Star in the constellation Orion / From Wikipedia, the free encyclopedia
HD 38858 is a G-type star,[3] much like The Sun, with one detected planet. The planet, designated HD 38858 b, is about twice the mass of Uranus and orbits in the star's habitable zone.[8]
Quick Facts Observation data Epoch J2000.0 Equinox J2000.0, Constellation ...
Observation data Epoch J2000.0 Equinox J2000.0 | |
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Constellation | Orion |
Right ascension | 05h 48m 34.93996s[1] |
Declination | −04° 05′ 40.7153″[1] |
Apparent magnitude (V) | +5.97[2] |
Characteristics | |
Spectral type | G4V[3] |
U−B color index | +0.10[2] |
B−V color index | +0.64[2] |
Astrometry | |
Radial velocity (Rv) | +31.2[4] km/s |
Proper motion (μ) | RA: 60.84 ± 0.41[1] mas/yr Dec.: –228.35 ± 0.33[1] mas/yr |
Parallax (π) | 65.89 ± 0.41 mas[1] |
Distance | 49.5 ± 0.3 ly (15.18 ± 0.09 pc) |
Details | |
Mass | 0.886[5] M☉ |
Radius | 0.9331 ± 0.0162[5] R☉ |
Luminosity | 0.7943 ± 0.0101[5] L☉ |
Surface gravity (log g) | 4.36 ± 0.06[3] cgs |
Temperature | 5,660 ± 20[3] K |
Metallicity [Fe/H] | –0.27 ± 0.03[3] dex |
Rotational velocity (v sin i) | 2.61[6] km/s |
Age | 6.2[7] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Exoplanet Archive | data |
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The last observation of this system for a dust disc or comet belt was in 2009 by the Spitzer Space Telescope; a belt was inferred at 102 AU.[7] It has an inclination of 48◦.[9]
The star exhibit a magnetic activity cycle remarkably similar to that of Sun, with the period of 10.8 years.[10]