Beta Carinae
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| Observation data Epoch J2000 | |
|---|---|
| Constellation | Carina |
| Right ascension | 09h 13m 12.0s |
| Declination | -69° 43' 02" |
| Apparent magnitude (V) | 1.67 |
| Characteristics | |
| Spectral type | A2 IV |
| B-V color index | 0.00 |
| U-B color index | 0.03 |
| Variable type | None |
| Astrometry <tr valign=top><td>Radial velocity (Rv)</td><td>-5.2 km/s</td></tr><tr valign=top><td>Proper motion (μ)</td><td> RA: -157.66 mas/yr Dec.: 108.91 mas/yr </td></tr><tr valign=top><td>Parallax (π)</td><td>29.34 ± 0.47 mas</td></tr><tr valign=top><td>Distance</td><td>111 ± 2 ly (34.1 ± 0.5 pc)</td></tr><tr valign=top><td>Absolute magnitude (MV)</td><td>-1.00</td></tr> | |
| Details | |
| Mass | 3 M☉ |
| Radius | 5.7 R☉ |
| Luminosity | 210 L☉ |
| Temperature | 9,100 K |
| Metallicity | ? |
| Rotation | 2.1 days |
| Age | 3.5 × 108 years |
| Other designations | |
Beta Carinae (β Car / β Carinae) is the second brightest star in the constellation Carina and one of the brightest stars in the nighttime sky, with apparent magnitude 1.68. It also has the traditional name Miaplacidus ("placid waters").
The traditional name is apparently from Latin placidus and Arabic مياه miyāh "waters".
[edit] References
- HD 80007 -- High proper-motion Star. SIMBAD Astronomical Database. Retrieved on 2005-11-05.
[edit] External links
- Beta Carinae. ARICNS. Retrieved on December 9, 2005.
- MIAPLACIDUS (Beta Carinae). Portrait of Stars, &c.. Retrieved on December 9, 2005.
- Miaplacidus (Beta Carinae). Astronomy Encyclopedia. Retrieved on December 9, 2005.de:Miaplacidus
