Rho Octantis
Location of ρ Octantis (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Octans |
| Right ascension | 15h 43m 16.927s[1] |
| Declination | −84° 27′ 54.99″[1] |
| Apparent magnitude (V) | 5.57±0.01[2] |
| Characteristics | |
| Spectral type | A1/2 V[3] |
| U−B color index | +0.08[4] |
| B−V color index | +0.11[4] |
| Astrometry | |
| Radial velocity (Rv) | −11±10[5] km/s |
| Proper motion (μ) | RA: +131.101[1] mas/yr Dec.: +96.007[1] mas/yr |
| Parallax (π) | 15.1565±0.0796 mas[1] |
| Distance | 215 ± 1 ly (66.0 ± 0.3 pc) |
| Absolute magnitude (MV) | +1.47[6] |
| Details | |
| Mass | 1.99[7] M☉ |
| Radius | 2.19±0.07[8] R☉ |
| Luminosity | 21±1[8] L☉ |
| Surface gravity (log g) | 4.06±0.14[9] cgs |
| Temperature | 8,881±302[9] K |
| Rotational velocity (v sin i) | 128[10] km/s |
| Age | 431[7] Myr |
| Other designations | |
| ρ Octantis, 24 G. Octantis, CPD–84 510, HD 13733, HIP 76996, HR 5729, SAO 258731, WDS J15433-8428A | |
| Database references | |
| SIMBAD | data |
Rho Octantis, Latinized from ρ Octantis, is a star located in the southern circumpolar constellation Octans. With an apparent magnitude of 5.57,[2] its faintly visible to the naked eye under ideal conditions. The star is located 215 light years away from the Solar System,[1] but is drifting closer with a radial velocity of −11 km/s.[5]
Rho Octantis has a classification of A1/2 V, which states its a star with the traits of an A1 and A2 main-sequence star. It has nearly twice the mass of the Sun,[7] and has a radius of 2.19 solar radii.[8] The star radiates at a luminosity 21 times greater than the Sun from its photosphere[8] at an effective temperature of 8,881 K,[9] which gives it a white hue. Like many A-type stars, Rho Octantis rotates rapidly, with a projected rotational velocity of 128 km/s;[10] it is 431 million years old.[7] Rho Octantis has a common proper motion K0 companion 65.7” away.[11]
References
[edit | edit source]- ^ a b c d e f Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Gaia DR2 record for this source at VizieR.
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
