R Equulei
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Equuleus |
| Right ascension | 21h 13m 11.49118s |
| Declination | 12° 48′ 06.1620″ |
| Apparent magnitude (V) | 8.7 - 15.0 |
| Characteristics | |
| Spectral type | M3e - M4e |
| B−V color index | +1.41 |
| Variable type | Mira |
| Astrometry | |
| Radial velocity (Rv) | −54±5 km/s |
| Proper motion (μ) | RA: −2.713 mas/yr Dec.: −11.232 mas/yr |
| Parallax (π) | 0.4329±0.0437 mas |
| Distance | approx. 7,500 ly (approx. 2,300 pc) |
| Details | |
| Mass | 3.42 M☉ |
| Luminosity | 33,791 L☉ |
| Surface gravity (log g) | −0.007 cgs |
| Temperature | 3,395 K |
| Metallicity [Fe/H] | −0.13 dex |
| Other designations | |
| R Equ, BD+12°4573a, HD 202051, PPM 139768 | |
| Database references | |
| SIMBAD | data |
R Equulei is a class M Mira variable star in the constellation Equuleus. Its brightness varies between a minimum magnitude of 15.0 to a maximum of 8.7 with an average period of 261 days.