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Star in the constellation of Camelopardalis From Wikipedia, the free encyclopedia
HD 37289, also known as HR 1916, is a solitary,[11] orange hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.61,[2] making it faintly visible to the naked eye under ideal conditions. Based on parallax measurements from the Gaia spacecraft, the object is estimated to be 308 light years distant.[1] It appears to be approaching the Sun, having a heliocentric radial velocity of −20.7 km/s.[5]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Camelopardalis |
Right ascension | 05h 42m 26.44853s[1] |
Declination | +65° 41′ 51.5374″[1] |
Apparent magnitude (V) | 5.61±0.01[2] |
Characteristics | |
Evolutionary stage | red giant branch[1] |
Spectral type | K5 III[3] |
B−V color index | +1.24[4] |
Astrometry | |
Radial velocity (Rv) | −20.7±0.2[5] km/s |
Proper motion (μ) | RA: −0.243 mas/yr[1] Dec.: −21.572 mas/yr[1] |
Parallax (π) | 10.5949 ± 0.0594 mas[1] |
Distance | 308 ± 2 ly (94.4 ± 0.5 pc) |
Absolute magnitude (MV) | +1.01[6] |
Details | |
Mass | 3.30±0.04[1] M☉ |
Radius | 13.57[7] R☉ |
Luminosity | 69.9[8] L☉ |
Surface gravity (log g) | 2.29[9] cgs |
Temperature | 4,360±90[10] K |
Metallicity [Fe/H] | 0.00[10] dex |
Age | 293+27 −28[1] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 37289 has a stellar classification of K5 III,[3] indicating that it is an evolved red giant. Gaia DR3 stellar evolution models place it on the red giant branch.[1] This means that it is currently fusing a hydrogen shell around an inert helium core. At present it has 3.3 times the mass of the Sun and at the age of 293 million years,[1] it has expanded to a radius of 13.6 R☉.[7] It radiates at 70 times the luminosity of the Sun[8] from its enlarged photosphere at an effective temperature of 4,360 K.[10] HD 37289 has been calculated to have a metallicity approximately around solar level.[10]
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