BN Camelopardalis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 05h 12m 22.43769s[2] |
| Declination | +73° 56′ 48.03820″[2] |
| Apparent magnitude (V) | 5.49[3] (5.34 to 5.58)[4] |
| Characteristics | |
| Spectral type | B9.5VpSi[5] |
| B−V color index | −0.108±0.003[3] |
| Variable type | α2 CVn[4] |
| Astrometry | |
| Radial velocity (Rv) | +9.3±2.8[3] km/s |
| Proper motion (μ) | RA: +6.033[2] mas/yr Dec.: –27.088[2] mas/yr |
| Parallax (π) | 10.5286±0.2275 mas[2] |
| Distance | 310 ± 7 ly (95 ± 2 pc) |
| Absolute magnitude (MV) | +0.13[3] |
| Details | |
| Mass | 3.05±0.13[6] M☉ |
| Radius | 2.9±0.4[7] R☉ |
| Luminosity | 110[6] L☉ |
| Surface gravity (log g) | 4.15±0.11[7] cgs |
| Temperature | 11,561[6] K |
| Rotation | 2.73332 days[7] |
| Rotational velocity (v sin i) | 23[8] km/s |
| Other designations | |
| BN Cam, BD+73°274, FK5 2387, HD 32650, HIP 24254, HR 1643, SAO 5455[9] | |
| Database references | |
| SIMBAD | data |
BN Camelopardalis is a suspected astrometric binary[10] in the northern circumpolar constellation of Camelopardalis. It appears as a variable star that is visible to the naked eye as a dim, white-hued point of light with an apparent visual magnitude that fluctuates around 5.49.[3] The system is located at a distance of around 310 light years from the Sun based on parallax,[2] and is drifting further away with a radial velocity of +9 km/s.[3]
The visible component is a weakly magnetic[11] chemically peculiar star[12][13] with a stellar classification of B9.5VpSi,[5] matching a B-type main-sequence star with an anomalous abundance of silicon.
John Ernest Winzer announced that the star is a variable star, in 1974.[14] It was given its variable star designation in 1981.[15] It ranges in brightness from 5.34 down to 5.58.[4] Samus et al. (2017) have it categorized as an α2 Canum Venaticorum variable with a period of 2.7347 days,[4] while Adelman and Sutton (2007) found a period of 2.73501 days.[12] The star has three times the mass and radius of the Sun and is radiating 110 times the Sun's luminosity from its photosphere at an effective temperature of 11,561 K.[7][6]
References
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- ^ 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 c d e f Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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