Mu2 Octantis
Mu2 Octantis (μ2 Oct) is a binary star system of two G-type main-sequence stars. It shares the designation μ with μ1 Octantis, from which it is separated by 50 arcminutes.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Octans |
| Right ascension | 20h 41m 44.102s |
| Declination | −75° 21′ 02.88″ |
| Apparent magnitude (V) | +6.51 |
| Characteristics | |
| Spectral type | G1V |
| U−B color index | +0.26 |
| B−V color index | +0.62 |
| Astrometry | |
| Radial velocity (Rv) | −10.90±0.2 km/s |
| Proper motion (μ) | RA: 156.404 mas/yr Dec.: −162.214 mas/yr |
| Parallax (π) | 25.0327 ± 0.0205 mas |
| Distance | 130.3 ± 0.1 ly (39.95 ± 0.03 pc) |
| Absolute magnitude (MV) | 3.28 |
| Details | |
| Mass | 1.29±0.08 M☉ |
| Radius | 1.73±0.21 R☉ |
| Luminosity | 3.73 L☉ |
| Surface gravity (log g) | 4.24±0.03 cgs |
| Temperature | 6,017±46 K |
| Metallicity [Fe/H] | +0.18±0.04 dex |
| Rotation | 26±3 days |
| Rotational velocity (v sin i) | 1.45 km/s |
| Age | 3.3±0.6 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
Mu2 Octantis has a 29% higher mass than the sun, and is slightly hotter. Its radius is 73% more than the Sun's and it is nearly four times as luminous.
This star is a member of a wider binary star system. The two components are gravitationally bound and separated at 17 arcseconds in our sky, corresponding to 740 astronomical units (AU). The semimajor axis of the stars' orbit is 932 AU. The companion star is HD 196068, another G-type main-sequence star with an apparent magnitude of 7.18.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.