| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pisces[1] |
| Right ascension | 01h 37m 40.87904s[2] |
| Declination | +12° 04′ 42.1703″[2] |
| Apparent magnitude (V) | 6.77[1] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | G2 V[3] |
| B−Vcolor index | 0.648±0.008[1] |
| Astrometry | |
| Radial velocity (Rv) | −20.97±0.13[2] km/s |
| Proper motion (μ) | RA: +120.372[2]mas/yr Dec.: +6.15[2]mas/yr |
| Parallax (π) | 39.3118±0.0303 mas[2] |
| Distance | 82.97 ± 0.06 ly (25.44 ± 0.02 pc) |
| Absolute magnitude (MV) | 4.73[1] |
| Details | |
| Mass | 0.95[2] M☉ |
| Radius | 1.1[2] R☉ |
| Luminosity | 1.1[2] L☉ |
| Surface gravity (log g) | 4.43±0.01[4] cgs |
| Temperature | 5,831±5[4] K |
| Metallicity[Fe/H] | +0.095±0.005[4] dex |
| Rotation | 23[5] days |
| Rotational velocity (v sin i) | 1.90±0.15[4] km/s |
| Age | 3.29±0.51[4] Gyr |
| Other designations | |
| BD+11°207,HD 9986,HIP 7585,SAO 92543[6] | |
| Database references | |
| SIMBAD | data |
HD 9986 is aSun-likestar in theequatorialconstellation ofPisces. With anapparent visual magnitude of 6.77,[1] 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 fromparallax measurements, but it is drifting closer with aradial velocity of −21 km/s.[2]
This object is aG-type main-sequence star with astellar classification of G2 V,[3] and is a nearsolar twin with physical properties very similar to the Sun's. It is around 3.3[4] billion years old and is spinning slowly with arotation period of about 23 days. A speckle survey of G-dwarfs by Elliott P. Horch in 2002 noted that HD 9986 may be a non-single star.[7]
