5 Camelopardalis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 04h 55m 03.13350s[1] |
| Declination | +55° 15′ 32.8530″[1] |
| Apparent magnitude (V) | 5.522[2] |
| Characteristics | |
| Spectral type | B9.5 V[3] or B9.5 IV[4] |
| U−B color index | +0.001[2] |
| B−V color index | +0.038[2] |
| Astrometry | |
| Radial velocity (Rv) | +2.4[5] km/s |
| Proper motion (μ) | RA: −15.304[1] mas/yr Dec.: −11.501[1] mas/yr |
| Parallax (π) | 4.2348±0.0951 mas[1] |
| Distance | 770 ± 20 ly (236 ± 5 pc) |
| Absolute magnitude (MV) | −0.84[6] |
| Details | |
| Mass | 2.15[7] M☉ |
| Radius | 5.1[7] R☉ |
| Luminosity | 226[7] L☉ |
| Surface gravity (log g) | 3.36[7] cgs |
| Temperature | 9,931[7] K |
| Rotational velocity (v sin i) | 102[8] km/s |
| Age | 277[9] Myr |
| Other designations | |
| 5 Cam, BD+55°941, FK5 2367, HD 30958, HIP 22854, HR 1555, SAO 24904, WDS J04551+5516A[10] | |
| Database references | |
| SIMBAD | data |
5 Camelopardalis is a binary star[11] system in the northern circumpolar constellation of Camelopardalis, located about 770 light years away from the Sun as determined using parallax.[1] With an apparent magnitude of 5.5,[2] it can be seen with the naked eye as a faint, blue-white hued star. The system is moving further from the Earth with a heliocentric radial velocity of +2.4 km/s.[5]
The primary component is a B-type main sequence star with a stellar classification of B9.5 V.[3] However, Abt and Morrell (1995) found a luminosity class of IV,[4] suggesting it is instead a subgiant star that is evolving off the main sequence. It has a high rate of spin with a projected rotational velocity of 102 km/s and has 2.15 times the mass of the Sun. The star is radiating 226 times the luminosity of the Sun from its photosphere at an effective temperature of 9,931 K.[7]
The magnitude 12.9 common proper motion companion lies at an angular separation of 12.9″.[11] It appears to be slightly smaller and cooler than the Sun.[12]
References
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- ^ a b c d 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).
- ^ 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 e f 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).
- ^ 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).
- ^ 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.
