61 Virginis
61 Virginis (abbreviated 61 Vir) is the Flamsteed designation of a G-type main-sequence star (G7V) slightly less massive than the Sun (which has a hotter G2V spectral type), located 27.8 light-years (8.5 parsecs) away in the constellation of Virgo. The composition of this star is nearly identical to the Sun.
61 Vir as seen with a 12.5" telescope with a field of view of 45.1 arcminutes | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 13h 18m 24.31399s |
| Declination | −18° 18′ 40.2977″ |
| Apparent magnitude (V) | 4.74 |
| Characteristics | |
| Spectral type | G7V |
| Apparent magnitude (B) | 5.45 |
| Apparent magnitude (J) | 3.334 |
| Apparent magnitude (H) | 2.974 |
| Apparent magnitude (K) | 2.956 |
| U−B color index | 0.26 |
| B−V color index | 0.71 |
| V−R color index | 0.37 |
| R−I color index | 0.33 |
| Astrometry | |
| Radial velocity (Rv) | −7.86±0.13 km/s |
| Proper motion (μ) | RA: −1,070.202 mas/yr Dec.: −1,063.849 mas/yr |
| Parallax (π) | 117.1726 ± 0.1456 mas |
| Distance | 27.84 ± 0.03 ly (8.53 ± 0.01 pc) |
| Absolute magnitude (MV) | 5.07 |
| Details | |
| Mass | 0.93 M☉ |
| Radius | 0.9867±0.0048 R☉ |
| Luminosity | 0.8222±0.0033 L☉ |
| Surface gravity (log g) | 4.5 cgs |
| Temperature | 5538±13 K |
| Metallicity [Fe/H] | −0.02 dex |
| Rotation | 29 days |
| Rotational velocity (v sin i) | 3.9 ± 0.9 km/s |
| Age | 6.1–6.6 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| ARICNS | data |
61 Virginis (G7V) is the first well-established main-sequence star very similar to the Sun with a potential super-Earth, though it was preceded by CoRoT-7 (a borderline orange dwarf).
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