HD 43848
Star in the constellation Columba
From Wikipedia, the free encyclopedia
HD 43848 is a 9th magnitude K-type subgiant star located 122 light-years away in the constellation of Columba. The star is less massive than the Sun.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Columba[1] |
| Right ascension | 06h 16m 31.35599s[2] |
| Declination | −40° 31′ 54.8276″[2] |
| Apparent magnitude (V) | 8.65[3] |
| Characteristics | |
| Spectral type | K2 IV[4] |
| Astrometry | |
| Proper motion (μ) | RA: +121.719[2] mas/yr Dec.: +200.617[2] mas/yr |
| Parallax (π) | 26.7558±0.0804 mas[2] |
| Distance | 121.9 ± 0.4 ly (37.4 ± 0.1 pc) |
| Absolute magnitude (MV) | +5.76[1] |
| Details | |
| Mass | 0.98[5] M☉ |
| Radius | 0.87[5] R☉ |
| Luminosity | 0.50[5] L☉ |
| Surface gravity (log g) | 4.55[5] cgs |
| Temperature | 5,140[5] K |
| Metallicity [Fe/H] | +0.31[5] dex |
| Rotational velocity (v sin i) | 2.5[5] km/s |
| Age | 3.7±1.7[3] Gyr |
| Other designations | |
| CD−40°2356, HIP 29804, LTT 2505, NLTT 16340, SAO 217824[6] | |
| Database references | |
| SIMBAD | data |
On October 29, 2008, radial velocity measurements made with the MIKE echelle spectrograph on the 6.5-m Magellan II (Clay) telescope revealed the presence of a companion of at least 25 Jupiter masses orbiting the star.[7] Initially thought to be a brown dwarf, astrometric measurements reveal that the true mass of the object is 120+167
−43 Jupiter masses, implying that it is likely to be a red dwarf star.[8]
