HD 15115
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|
HD 15115 |
|
| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Cetus |
| Right ascension | 02h 26m 16.2447s |
| Declination | +06° 17' 33.188"' |
| Apparent magnitude (V) | 6.8 |
| Characteristics | |
| Spectral type | F2 |
| U-B color index | ? |
| B-V color index | ? |
| Variable type | None |
| Astrometry | |
| Proper motion (μ) | RA: 86.09 mas/yr Dec.: -50.13 mas/yr |
| Parallax (π) | 22.33 ± 1.05 mas |
| Distance | 146 ± 7 ly (45 ± 2 pc) |
| Absolute magnitude (MV) | 7.15 |
| Details | |
| Mass | ? M☉ |
| Radius | ? R☉ |
| Luminosity | ? L☉ |
| Temperature | ? K |
| Metallicity | ? |
| Rotation | ? |
| Age | 12 million years |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 15115 is a yellow-white star.
The asymmetric disk encircling the star was discovered using the Hubble Space Telescope and further investigated by the W.M. Keck Observatory.
The reason for the asymmetry is thought to be the gravitational pull of either a companion star or else an exoplanet.
[edit] References
- http://www.nasa.gov/mission_pages/hubble/news/lopsided_disk.html
- http://jumk.de/astronomie/exoplanets/hd-15115.shtml
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