BN Camelopardalis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 05h 12m 22.43769s |
| Declination | +73° 56′ 48.03820″ |
| Apparent magnitude (V) | 5.49 (5.34 to 5.58) |
| Characteristics | |
| Spectral type | B9.5VpSi |
| B−V color index | −0.108±0.003 |
| Variable type | α2 CVn |
| Astrometry | |
| Radial velocity (Rv) | +9.3±2.8 km/s |
| Proper motion (μ) | RA: +6.033 mas/yr Dec.: –27.088 mas/yr |
| Parallax (π) | 10.5286±0.2275 mas |
| Distance | 310 ± 7 ly (95 ± 2 pc) |
| Absolute magnitude (MV) | +0.13 |
| Details | |
| Mass | 3.05±0.13 M☉ |
| Radius | 2.9±0.4 R☉ |
| Luminosity | 110 L☉ |
| Surface gravity (log g) | 4.15±0.11 cgs |
| Temperature | 11,561 K |
| Rotation | 2.73332 days |
| Rotational velocity (v sin i) | 23 km/s |
| Other designations | |
| BN Cam, BD+73°274, FK5 2387, HD 32650, HIP 24254, HR 1643, SAO 5455 | |
| Database references | |
| SIMBAD | data |
BN Camelopardalis is a suspected astrometric binary 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. The system is located at a distance of around 310 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +9 km/s.
The visible component is a weakly magnetic chemically peculiar star with a stellar classification of B9.5VpSi, 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. It was given its variable star designation in 1981. It ranges in brightness from 5.34 down to 5.58. Samus et al. (2017) have it categorized as an α2 Canum Venaticorum variable with a period of 2.7347 days, while Adelman and Sutton (2007) found a period of 2.73501 days. 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.