HD 12039
From Wikipedia, the free encyclopedia
| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Cetus |
| Right ascension | 01h 57m 49s |
| Declination | −21° 54′ 05.3″ |
| Apparent magnitude (V) | 8.11 |
| Characteristics | |
| Spectral type | G3-5 V |
| U-B color index | 4.94 |
| B-V color index | 0.65 |
| Variable type | BY Draconis |
| Astrometry | |
| Radial velocity (Rv) | +5.7 km/s |
| Proper motion (μ) | RA: ? mas/yr Dec.: ? mas/yr |
| Parallax (π) | 23.61 ± 1.03 mas |
| Distance | 138 ly (42.4 pc) |
| Absolute magnitude (MV) | 4.98 |
| Details | |
| Mass | 1.02 M☉ |
| Radius | ? R☉ |
| Luminosity | 1.08 L☉ |
| Temperature | ? K |
| Metallicity | ? |
| Rotation | ? |
| Age | 3 × 107 years |
| Other designations | |
HD 12039 is a variable star in the constellation of Cetus. It is categorized as a BY Draconis variable, and has a stellar classification that is similar to our own Sun.
Recently a debris field was discovered in orbit around this star using infrared observations by the Spitzer telescope. This debris is thought to be an asteroid belt. The measured temperature of the debris is 110°K, which places it in an orbit between 4 and 6 AU from the star, or about the same distance where Jupiter orbits our Sun.
[edit] References
- Hines, D. C. et al, "Discovery of an Unusual Debris System Associated with HD 12039", The Astrophysical Journal, 638:1070–1079, 2006 February 20.
 |
This main sequence star-related article is a stub. You can help Wikipedia by expanding it. |
