| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 12h 38m 29.9338s[2] |
| Declination | +06° 59′ 19.0256″[2] |
| Apparent magnitude (V) | 6.1 - 12.1[3] |
| Characteristics | |
| Spectral type | M3.5-7e[4] |
| U−B color index | 1.22[5] |
| B−V color index | 1.56[5] |
| Variable type | Mira[3] |
| Astrometry | |
| Radial velocity (Rv) | −26.60[6] km/s |
| Proper motion (μ) | RA: −32.283±0.248[2] mas/yr Dec.: 4.483±0.186[2] mas/yr |
| Parallax (π) | 1.8884 ± 0.0946 mas[2] |
| Distance | 1,730 ± 90 ly (530 ± 30 pc) |
| Details | |
| Mass | 2.18[7] M☉ |
| Radius | 130[8] R☉ |
| Surface gravity (log g) | 0.44[7] cgs |
| Temperature | 3,300[7]–3,800[8] K |
| Metallicity [Fe/H] | +0.49[7] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
R Virginis is a Mira variable in the constellation Virgo. Located approximately 530 parsecs (1,700 ly) distant, it varies between magnitudes 6.1 and 12.1 over a period of approximately 146 days.[3] Its variable nature was discovered by Karl Ludwig Harding in 1809.[9]
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