31 Camelopardalis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 05h 54m 57.828s[1] |
| Declination | +59° 53′ 18.12″[1] |
| Apparent magnitude (V) | 5.197 |
| Characteristics | |
| Spectral type | A2V |
| U−B color index | 0.03 |
| B−V color index | 0.02 |
| Variable type | Beta Lyrae variable |
| Astrometry | |
| Radial velocity (Rv) | -2.9 km/s |
| Proper motion (μ) | RA: 2.30 ± 0.54[1] mas/yr Dec.: -18.43 ± 0.38[1] mas/yr |
| Parallax (π) | 6.96 ± 0.51[1] mas |
| Distance | 470 ± 30 ly (140 ± 10 pc) |
| Absolute magnitude (MV) | 5.214 |
| Details | |
| Mass | 3,1 M☉ |
| Radius | 2,1 R☉ |
| Luminosity | 40 L☉ |
| Temperature | 7,500–10,000 K |
| Rotation | 76 Km/s 0,0080219 Year |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
31 Camelopardalis is an eclipsing spectroscopic binary in the constellation Camelopardalis. It is approximately 470 light years from Earth.[1]
The binary system is classified as a white A-type main sequence dwarf with a mean apparent magnitude of +5.20. Both component stars are detached main sequence stars which do not fill their Roche lobes. Because the components regularly eclipse each other, 31 Camelopardalis is classified as a variable star and its brightness varies from magnitude +5.12 to +5.29 with a period of 2.93 days, which is the orbital period of the binary.
References
- 1 2 3 4 5 6 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752
. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
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