Beta Horologii
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Horologium |
| Right ascension | 02h 58m 47.7967s[1] |
| Declination | −64° 04′ 16.623″[1] |
| Apparent magnitude (V) | 4.979[1] |
| Characteristics | |
| Spectral type | A4IIIm...[1] |
| U−B color index | +0.15[2] |
| B−V color index | +0.13[2] |
| R−I color index | +0.05[2] |
| Astrometry | |
| Radial velocity (Rv) | 23.6 ± 2[1] km/s |
| Proper motion (μ) | RA: 22.96[1] mas/yr Dec.: 5.39[1] mas/yr |
| Parallax (π) | 10.40 ± 0.50[1] mas |
| Distance | 310 ± 20 ly (96 ± 5 pc) |
| Absolute magnitude (MV) | 0.1[3] |
| Details | |
| Radius | 1.40[4] R☉ |
| Rotational velocity (v sin i) | 84[2] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Beta Horologii (Beta Hor, β Horologii, β Hor) is the third-brightest star in the constellation of Horologium. It is an A-type giant star with an apparent visual magnitude of approximately 4.979, and is a chemically peculiar star of the metallic-line type.[1]
References
- 1 2 3 4 5 6 7 8 9 10 * bet Hor -- Star, database entry, SIMBAD. Accessed on line September 18, 2008.
- 1 2 3 4 HR 909, 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 18, 2008.
- ↑ From apparent magnitude and parallax.
- ↑ HD 18866, database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224. Accessed on line September 18, 2008.
External links
- Jim Kaler's Stars, University of Illinois: BETA HOR(Beta Horologii)
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