HIP 13044
HIP 13044 is a red horizontal-branch star about 2,300 light years (700 pc) from Earth in the constellation Fornax. The star is part of the Helmi stream, a former dwarf galaxy that merged with the Milky Way between six and nine billion years ago. As a result, HIP 13044 circles the Galactic Center at a highly irregular orbit with respect to the galactic plane. HIP 13044 is slightly less massive than the Sun, but is approximately seven times its size. The star, which is estimated to be at least nine billion years old, has passed the red-giant phase. The relatively fast rotation of the star may be due to having engulfed one or more planets during the red-giant phase.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Fornax |
| Right ascension | 02h 47m 37.44310s |
| Declination | −36° 06′ 27.0322″ |
| Apparent magnitude (V) | +9.94 |
| Characteristics | |
| Evolutionary stage | Horizontal branch |
| Spectral type | F2 |
| B−V color index | 0.466±0.026 |
| Astrometry | |
| Radial velocity (Rv) | 300 km/s |
| Proper motion (μ) | RA: 3.083 mas/yr Dec.: −12.573 mas/yr |
| Parallax (π) | 1.3705 ± 0.0499 mas |
| Distance | 2,380 ± 90 ly (730 ± 30 pc) |
| Details | |
| Mass | 0.8±0.1 M☉ |
| Radius | 6.7±0.3 R☉ |
| Temperature | 6,025±63 K |
| Metallicity [Fe/H] | −2.09±0.26 dex |
| Rotation | 5.53±0.73 d |
| Other designations | |
| Database references | |
| SIMBAD | data |
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