Gamma Camelopardalis
  | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Camelopardalis[1] |
| Right ascension | 03h 50m 21.509s[2] |
| Declination | +71° 19′ 56.16″[2] |
| Apparent magnitude (V) | 4.66[3] + 9.07[4] |
| Characteristics | |
| Spectral type | A2 IVn[5] |
| U−B color index | +0.07[3] |
| B−V color index | +0.03[3] |
| Astrometry | |
| Radial velocity (Rv) | −2.84±0.28[2] km/s |
| Proper motion (μ) | RA: +18.435 mas/yr[2] Dec.: −41.956 mas/yr[2] |
| Parallax (π) | 8.4446±0.0826 mas[2] |
| Distance | 386 ± 4 ly (118 ± 1 pc) |
| Absolute magnitude (MV) | −0.62[1] |
| Details | |
| γ Cam A | |
| Mass | 3.40±0.17[6] M☉ |
| Radius | 5.55±0.28[6] R☉ |
| Luminosity | 185[7] L☉ |
| Surface gravity (log g) | 3.70±0.01[2] cgs |
| Temperature | 8,892[7] K |
| Rotational velocity (v sin i) | 205[8] km/s |
| Other designations | |
| γ Cam, BD+70°259, FK5 138, GC 4557, HD 23401, HIP 17959, HR 1148, SAO 5006, CCDM 03504+7120, WDS J03504+7120A[9] | |
| Database references | |
| SIMBAD | data |
Gamma Camelopardalis is a suspected wide binary star[10] system in the northern circumpolar constellation of Camelopardalis. Its name is a Bayer designation that is Latinized from γ Camelopardalis, and abbreviated Gamma Cam or γ Cam. With a visual magnitude of 4.66,[3] it is faintly visible to the naked eye. Based upon an annual parallax shift of 9.09 mas as seen from Earth,[2] this system is located about 386 light-years (118 pc) from the Sun. It is drifting closer with a line of sight velocity of −2.8 km/s.[2]
The brighter primary, designated component A, is a white-hued A-type subgiant star with a stellar classification of A2 IVn.[5] It is spinning rapidly with a projected rotational velocity of 205 km/s. This is giving the star an oblate shape with an equatorial bulge that is 17% larger than the polar radius.[8] It has about 3.4 times the mass of the Sun and 5.6 times the Sun's radius.[6] The star is radiating 185[7] times the Sun's luminosity from its photosphere at an effective temperature of 8,892 K.[7]
The magnitude 9.07 secondary, BD+70 260, designated component C, lies at an angular separation of 106.00 arc seconds along a position angle of 85°, as of 2011. Component B is a magnitude 12.40 visual companion at a separation of 56.30 arc seconds along position angle 247°.[4]
References
[edit | edit source]- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). XHIP record for this object at VizieR.
- ^ a b c d e f g h Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Gaia DR3 record for this source at VizieR.
- ^ 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 c 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 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).
