| 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]
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