Beta Chamaeleontis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Chamaeleon |
| Right ascension | 12h 18m 20.8242s[1] |
| Declination | −79° 18′ 44.063″[1] |
| Apparent magnitude (V) | 4.24 to 4.30[2] |
| Characteristics | |
| Spectral type | B5Vn[1] |
| U−B color index | −0.51[3] |
| B−V color index | −0.12[3] |
| R−I color index | −0.10[3] |
| Astrometry | |
| Radial velocity (Rv) | 23 ± 5[1] km/s |
| Proper motion (μ) | RA: −38.07[1] mas/yr Dec.: 12.00[1] mas/yr |
| Parallax (π) | 12.05 ± 0.51[1] mas |
| Distance | 270 ± 10 ly (83 ± 4 pc) |
| Absolute magnitude (MV) | −0.3[4] |
| Details | |
| Mass | 5.0 ± 0.1[5] M☉ |
| Radius | 2.84 ± 0.13[6] R☉ |
| Surface gravity (log g) | 4.03 ± 0.05[6] cgs |
| Temperature | 14,495 ± 157[6] K |
| Rotational velocity (v sin i) | 255[3] km/s |
| Age | 22.7 ± 7.2[5] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Beta Chamaeleontis (Beta Cha, β Chamaeleontis, β Cha) is a B-type main sequence star and is the third brightest star in the constellation of Chamaeleon.[1] It has an apparent visual magnitude which varies between 4.24 and 4.30.[2]
References
- 1 2 3 4 5 6 7 8 9 NSV 5532 -- Variable Star, database entry, SIMBAD. Accessed on line September 5, 2008.
- 1 2 NSV 5532, database entry, New Catalogue of Suspected Variable Stars, the improved version, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line September 5, 2008.
- 1 2 3 4 HR 4674, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line September 5, 2008.
- ↑ From apparent magnitude and parallax.
- 1 2 Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society 410 (1): 190–200, arXiv:1007.4883, Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x
- 1 2 3 Fitzpatrick, E. L.; Massa, D. (March 2005), "Determining the Physical Properties of the B Stars. II. Calibration of Synthetic Photometry", The Astronomical Journal 129 (3): 1642–1662, arXiv:astro-ph/0412542, Bibcode:2005AJ....129.1642F, doi:10.1086/427855
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