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Star in the constellation Columba From Wikipedia, the free encyclopedia
HD 43899, also designated as HR 2263, is a solitary,[13] orange hued star located in the southern constellation Columba, the dove. It has an apparent magnitude of 5.53,[2] allowing it to be faintly visible to the naked eye. Based on parallax measurements from the Gaia spacecraft, the object is estimated to be 284 light years distant.[1] It appears to be rapidly receding with a heliocentric radial velocity of 66.5 km/s.[6] Eggen (1993) lists HD 43899 as an old disk star[14] and its kinematics match with that of the ζ Herculis moving group.[15]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Columba |
Right ascension | 06h 17m 01.23139s[1] |
Declination | −37° 44′ 14.8056″[1] |
Apparent magnitude (V) | 5.53±0.01[2] |
Characteristics | |
Evolutionary stage | red clump[3] |
Spectral type | K2 III[4] |
U−B color index | +1.11[5] |
B−V color index | +1.14[5] |
Astrometry | |
Radial velocity (Rv) | 66.5±4.3[6] km/s |
Proper motion (μ) | RA: +1.657 mas/yr[1] Dec.: +83.920 mas/yr[1] |
Parallax (π) | 11.4725 ± 0.0449 mas[1] |
Distance | 284 ± 1 ly (87.2 ± 0.3 pc) |
Absolute magnitude (MV) | +0.73[7] |
Details | |
Mass | 1.15±0.10[3] M☉ |
Radius | 12.38[8] R☉ |
Luminosity | 61+2.6 −5.0[1] L☉ |
Surface gravity (log g) | 2.04±0.24[3] cgs |
Temperature | 4,686±122[9] K |
Metallicity [Fe/H] | −0.12±0.08[3] dex |
Rotational velocity (v sin i) | 2.9±1[10] km/s |
Age | 6.32±1.68[3] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 43899 is an evolved giant star that is currently on the horizontal branch, a red clump star, fusing a hydrogen shell around an inert helium core.[3] It has a stellar classification of K2 III.[4] At present the object has 115% the mass of the Sun[3] and an effective temperature of 4,686 K.[9] At the age of 6.32 billion years,[3] it has already left the main sequence and now radiates 61 times the luminosity of the Sun[1] from an enlarged photosphere 12.4 times that of the sun.[8] HD 43899 has an iron abundance 24% below solar levels, making it slightly metal deficient.[3] It spins modestly with a projected rotational velocity of 2.9 km/s.[10]
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