Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Pisces |
Right ascension | 01h 37m 40.87927s[1] |
Declination | +12° 04′ 42.1714″[1] |
Apparent magnitude (V) | 6.77[2] |
Characteristics | |
Spectral type | G5 V[3] |
B−V color index | 0.648±0.008[2] |
Astrometry | |
Radial velocity (Rv) | −21.024±0.0006[1] km/s |
Proper motion (μ) | RA: +120.150[1] mas/yr Dec.: +6.057[1] mas/yr |
Parallax (π) | 39.2718 ± 0.0405 mas[1] |
Distance | 83.05 ± 0.09 ly (25.46 ± 0.03 pc) |
Absolute magnitude (MV) | 4.73[2] |
Details[4] | |
Mass | 1.02[3] M☉ |
Radius | 1.04+0.02 −0.01[1] R☉ |
Luminosity | 1.103±0.002[1] L☉ |
Surface gravity (log g) | 4.43±0.01 cgs |
Temperature | 5,831±5 K |
Metallicity [Fe/H] | +0.095±0.005 dex |
Rotation | 23[5] days |
Rotational velocity (v sin i) | 1.90±0.15 km/s |
Age | 3.29±0.51 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 9986 is a Sun-like star in the equatorial constellation of Pisces. With an apparent visual magnitude of 6.77,[2] it lies below the normal limit for visibility with the naked eye. The star is located at a distance of 83 light years from the Sun as determined from parallax measurements, but it is drifting closer with a radial velocity of −21 km/s.[1]
This object is a G-type main-sequence star with a stellar classification of G5 V,[3] and is a near solar twin with physical properties very similar to the Sun's. It is around 3.3[4] billion years old and is spinning slowly with a rotation period of about 23 days. A speckle survey of G-dwarfs by Elliott P. Horch in 2002 noted that HD 9986 may not be non-single star.[7]