HD 37289
From Wikipedia, the free encyclopedia
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Camelopardalis[1] |
| Right ascension | 05h 42m 26.44853s[2] |
| Declination | +65° 41′ 51.5374″[2] |
| Apparent magnitude (V) | 5.61±0.01[3] |
| Characteristics | |
| Evolutionary stage | red giant branch[2] |
| Spectral type | K5 III[4] |
| B−V color index | +1.24[5] |
| Astrometry | |
| Radial velocity (Rv) | −20.7±0.2[6] km/s |
| Proper motion (μ) | RA: −0.243 mas/yr[2] Dec.: −21.572 mas/yr[2] |
| Parallax (π) | 10.5949±0.0594 mas[2] |
| Distance | 308 ± 2 ly (94.4 ± 0.5 pc) |
| Absolute magnitude (MV) | +1.01[1] |
| Details | |
| Mass | 3.30±0.04[2] 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[2] Myr |
| Other designations | |
| AG+65°313, BD+65°485, FK5 2426, GC 7068, HD 37289, HIP 26882, HR 1916, SAO 13570 | |
| Database references | |
| SIMBAD | data |
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,[3] 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.[2] It appears to be approaching the Sun, having a heliocentric radial velocity of −20.7 km/s.[6]
HD 37289 has a stellar classification of K5 III,[4] indicating that it is an evolved red giant. Gaia DR3 stellar evolution models place it on the red giant branch.[2] 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,[2] 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]
