Mu Arae
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ara |
| Right ascension | 17h 44m 08.70314s |
| Declination | −51° 50′ 02.5916″ |
| Apparent magnitude (V) | 5.15 |
| Characteristics | |
| Spectral type | G3IV–V |
| Apparent magnitude (V) | 5.15±0.01 |
| Apparent magnitude (G) | 4.943±0.003 |
| Apparent magnitude (K) | 3.68±0.25 |
| U−B color index | +0.24 |
| B−V color index | +0.70 |
| Astrometry | |
| Radial velocity (Rv) | −9.54±0.13 km/s |
| Proper motion (μ) | RA: −15.034 mas/yr Dec.: −190.901 mas/yr |
| Parallax (π) | 64.0853±0.0904 mas |
| Distance | 50.89 ± 0.07 ly (15.60 ± 0.02 pc) |
| Absolute magnitude (MV) | +4.17 |
| Details | |
| Mass | 1.10±0.01 M☉ |
| Radius | 1.280±0.025 R☉ |
| Luminosity | 1.879±0.019 L☉ |
| Surface gravity (log g) | 4.30±0.03 cgs |
| Temperature | 5,974±61 K |
| Metallicity | 200±5% |
| Metallicity [Fe/H] | 0.29±0.01 dex |
| Rotational velocity (v sin i) | 3.1±0.5 km/s |
| Age | 6.34±0.40 Gyr |
| Other designations | |
| Cervantes, μ Arae, CD−51°11094, FK5 662, GC 24024, GJ 691, HD 160691, HIP 86796, HR 6585, SAO 244981, PPM 346258, LTT 7053 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| ARICNS | data |
Mu Arae is a single star with a planetary system in the constellation of Ara. Its name is a Bayer designation that is Latinized from μ Arae, and abbreviated Mu Ara or μ Ara. This star is officially named Cervantes, pronounced /sɜːrˈvæntiːz/ or sur-VAN-teez, and is often designated HD 160691. With an apparent visual magnitude of 5.15, it is faintly visible to the naked eye. Based on parallax measurements it is located approximately 51 light-years (16 pc) away from the Sun. It is drifting closer with a radial velocity of −10 km/s.
Cervantes is similar to the Sun, but is older, 10% more massive, and slightly evolved. It has four known extrasolar planets designated Mu Arae b, c, d and e; later named Quijote, Dulcinea, Rocinante and Sancho, respectively. Three of them have masses comparable with that of Jupiter. Mu Arae c, the innermost, was the first hot Neptune or super-Earth discovered.