| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Volans |
| Right ascension | 07h 06m 14.31s[1] |
| Declination | −68° 50′ 15.29″[1] |
| Apparent magnitude (V) | 6.47±0.01[2] |
| Characteristics | |
| Spectral type | K0 III[3] |
| U−B color index | +0.87[4] |
| B−V color index | +1.04[4] |
| Astrometry | |
| Radial velocity (Rv) | −13±0.14[1] km/s |
| Proper motion (μ) | RA: +5.690 mas/yr[1] Dec.: -2.103 mas/yr[1] |
| Parallax (π) | 6.3734 ± 0.0192 mas[1] |
| Distance | 512 ± 2 ly (156.9 ± 0.5 pc) |
| Absolute magnitude (MV) | +0.43[5] |
| Details | |
| Mass | 2.00±0.27[6] M☉ |
| Radius | 12.03±0.25[1] R☉ |
| Luminosity | 70.6±0.4[1] L☉ |
| Surface gravity (log g) | 2.77±0.14[7] cgs |
| Temperature | 4,824+51 −48[1] K |
| Metallicity [Fe/H] | −0.02±0.05[7] dex |
| Rotational velocity (v sin i) | <1[8] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 55151 (HR 2712) is a solitary star located in the circumpolar constellation Volans. With an apparent magnitude of 6.47,[2] it is near the limit of naked eye visibility. The star is located 512 light years[1] away from the Solar System, but is drifting closer with a heliocentric radial velocity of -13 km/s.[1]
HD 55151 has a stellar classification of K0 III,[3] which states that it is an early K-type star that has exhausted hydrogen at its core and left the main sequence. It has twice the Sun's mass,[6] but has expanded to 12 times the Sun's girth.[1] It radiates at 70 solar luminosities[1] from its enlarged photosphere at an effective temperature of 4,824 K,[1] which gives it the orangish-yellow hue of a K-type star. HD 55151 belongs to the thin disk population,[9] and is slightly metal deficient. However, it has a projected rotational velocity that is too low to be measured.[8]
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