Mu Arae
Mu Arae (μ Arae, abbreviated Mu Ara, μ Ara), often designated HD 160691, officially named Cervantes /sɜːrˈvæntiːz/ sur-VAN-teez, is a main sequence G-type star approximately 50 light-years away from the Sun in the constellation of Ara. The star has a planetary system with four known extrasolar planets (designated Mu Arae b, c, d and e; later named Quijote, Dulcinea, Rocinante and Sancho, respectively), three of them with masses comparable with that of Jupiter. Mu Arae c, the innermost, was the first hot Neptune or super-Earth discovered.
| 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±0.084 mas/yr Dec.: −190.901±0.065 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 | 1.36±0.01 R☉ |
| Luminosity | 1.90±0.10 L☉ |
| Surface gravity (log g) | 4.2±0.1 cgs |
| Temperature | 5,820±40 K |
| Metallicity | 200±5% |
| Metallicity [Fe/H] | 0.30±0.01 dex |
| Rotational velocity (v sin i) | 3.1±0.5 km/s |
| Age | 6.34±0.40 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| ARICNS | data |
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