R Canis Majoris
R Canis Majoris is an eclipsing interacting binary star system in the constellation Canis Major. It varies from magnitude 5.7 to 6.34. The system is unusual in the low ratio between the main two components and shortness of the orbital period.
| Observation data Epoch J2000.0 Equinox | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 07h 19m 28.18202s |
| Declination | −16° 23′ 42.8773″ |
| Apparent magnitude (V) | 5.70 - 6.34 |
| Characteristics | |
| Spectral type | F0V + G8IV |
| U−B color index | +0.01 |
| B−V color index | +0.34 |
| Variable type | Algol |
| Astrometry | |
| Radial velocity (Rv) | -39.0 km/s |
| Proper motion (μ) | RA: 165.37 mas/yr Dec.: −136.18 mas/yr |
| Parallax (π) | 23.38 ± 0.54 mas |
| Distance | 44 pc |
| Absolute magnitude (MV) | +2.57 |
| Details | |
| Mass | 1.67 + 0.22 + 0.8 M☉ |
| Radius | 1.78 + 1.22 + 0.83 R☉ |
| Luminosity | 8.2 + 0.49 + 0.4 L☉ |
| Surface gravity (log g) | 4.16 + 3.60 + 4.50 cgs |
| Temperature | 6,964 K |
| Rotational velocity (v sin i) | 78.3±3.9 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
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