17 Canis Majoris
Star in the constellation Canis Major
From Wikipedia, the free encyclopedia
17 Canis Majoris is a single[7] star in the southern constellation of Canis Major, located 602 light years away from the Sun.[1] It is visible to the naked eye as a dim, white-hued star with an apparent visual magnitude of 5.80.[2] The object is moving closer to the Earth with a heliocentric radial velocity of â13 km/s.[2]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 06h 55m 02.73800s[1] |
| Declination | â20° 24â² 17.5578â³[1] |
| Apparent magnitude (V) | 5.80[2] |
| Characteristics | |
| Evolutionary stage | Main sequence[3] |
| Spectral type | A2 V[4] |
| BâV color index | 0.048±0.003[2] |
| Astrometry | |
| Radial velocity (Rv) | â12.9±0.5[2] km/s |
| Proper motion (μ) | RA: â0.242[1] mas/yr Dec.: â10.241[1] mas/yr |
| Parallax (Ï) | 5.4157±0.0438 mas |
| Distance | 602 ± 5 ly (185 ± 1 pc) |
| Absolute magnitude (MV) | â0.14[2] |
| Details | |
| Mass | 2.84±0.05[3] Mâ |
| Radius | 5.2[5] Râ |
| Luminosity | 126+18 â15[3] Lâ |
| Surface gravity (log g) | 3.38[1] cgs |
| Temperature | 8,872+164 â162[3] K |
| Rotational velocity (v sin i) | 43[3] km/s |
| Age | 340[1] Myr |
| Other designations | |
| 17 CMa, BDâ20°1624, GC 9078, HD 51055, HIP 33248, HR 2588, SAO 172569, ADS 5585, CCDM 06550-2025, WDS J06550-2024[6] | |
| Database references | |
| SIMBAD | data |
This is an A-type main-sequence star with a stellar classification of A2 V,[4] and is near the end of its main sequence lifetime. It has 2.8 times the mass of the Sun and is spinning with a projected rotational velocity of 43 km/s.[3] The star is radiating 126 times the luminosity of the Sun from its photosphere at an effective temperature of 8,872 K.[3] It has a magnitude 8.66 visual companion at an angular separation of 42.90Ⳡalong a position angle of 147°, as of 2015.[8]