Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Columba |
Right ascension | 05h 32m 51.4130s[1] |
Declination | −38° 30′ 48.1306″[1] |
Apparent magnitude (V) | 5.46±0.01[2] |
Characteristics | |
Evolutionary stage | red giant branch[3] |
Spectral type | K2/3 III[4] |
B−V color index | +1.22[5] |
Astrometry | |
Radial velocity (Rv) | −0.6±0.1[6] km/s |
Proper motion (μ) | RA: +48.475 mas/yr[1] Dec.: −10.959 mas/yr[1] |
Parallax (π) | 18.7844 ± 0.0462 mas[1] |
Distance | 173.6 ± 0.4 ly (53.2 ± 0.1 pc) |
Absolute magnitude (MV) | +1.84[7] |
Details | |
Mass | 1.18[8] M☉ |
Radius | 8.71+0.62 −0.58[9] R☉ |
Luminosity | 24.54[10] L☉ |
Surface gravity (log g) | 2.7±0.2[11] cgs |
Temperature | 4,460±70[11] K |
Metallicity [Fe/H] | +0.28±0.05[11] dex |
Rotational velocity (v sin i) | <2.7[12] km/s |
Age | 7.33[8] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 36848 (HR 1877) is a star in the southern constellation Columba. It has an apparent magnitude of 5.46,[2] allowing it to be faintly seen with a naked eye. The star is relatively close at a distance of 174 light years[1] and is moving closer with a heliocentric radial velocity of only −0.6 km/s.[6]
HD 36848 has a stellar classification of K2/3 III — intermediate between a K2 and 3 giant star. It is on the red giant branch,[3] meaning it has exhausted its core hydrogen and is now fusing hydrogen in a shell outside the core. It has a comparable mass to the Sun[8] but has expanded to 8.71 times the radius of the Sun[9] after 7.33 billion years.[8] It shines with a luminosity of 24.5 L☉[10] from its enlarged photosphere at an effective temperature of 4,460 K,[11] giving t an orange hue. The star is metal enriched with an iron abundance 90% greater than that of the Sun[11] and spins with a projected rotational velocity lower than 2.7 km/s.[12]
The star's multiplicity status isn't generally agreed on. Eggleton et al. classifies it as a solitary star[15] while De Mederios et al. finds it to be a probable spectroscopic binary.[12]