HD 27245
Star in the constellation Camelopardalis
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HD 27245, also known as HR 1335 or rarely 25 H. Camelopardalis is a solitary red-hued star[15] located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.4,[3] making it faintly visible to the naked eye. Gaia DR3 Parallax measurements place it approximately 607 light years[2] away from it the Solar System and is drifting further away with a heliocentric radial velocity of 25.2 km/s.[7] At its current distance, HD 27245's brightness is diminished by 0.36 magnitudes due to extinction from interstellar dust.[16] It has an absolute magnitude of −0.27.[1]
 | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Camelopardalis[1] |
| Right ascension | 04h 21m 47.64917s[2] |
| Declination | +60° 44′ 08.2461″[2] |
| Apparent magnitude (V) | 5.40±0.01[3] |
| Characteristics | |
| Spectral type | M0 III[4] |
| B−V color index | +1.50[5] |
| Variable type | suspected[6] |
| Astrometry | |
| Radial velocity (Rv) | +25.2±0.3[7] km/s |
| Proper motion (μ) | RA: +55.890 mas/yr[2] Dec.: −114.046 mas/yr[2] |
| Parallax (π) | 5.3716±0.0848 mas[2] |
| Distance | 607 ± 10 ly (186 ± 3 pc) |
| Absolute magnitude (MV) | −0.27[1] |
| Details | |
| Mass | 1.18[8] M☉ |
| Radius | 52.8±2.7[9] R☉ |
| Luminosity | 570±16[10] L☉ |
| Surface gravity (log g) | 1.29[11] cgs |
| Temperature | 4,033±122[12] K |
| Metallicity [Fe/H] | +0.11[8] dex |
| Other designations | |
| 25 H. Camelopardalis,[13] NSV 1558, AG+60°426, BD+60°800, FK5 2317, GC 5244, HD 27245, HIP 20376, HR 1335, SAO 13113[14] | |
| Database references | |
| SIMBAD | data |
HD 27245 is an aging red giant with a stellar classification of M0 III.[4] It has 118% the mass of the Sun[8] but has expanded to a radius of 52.8 R☉.[11] It radiates 570 times the luminosity of the Sun[10] from its enlarged photosphere at an effective temperature of 4,033 K.[12] HD 27245's iron abundance is 129% that of the Sun's,[8] making it metal enriched.
HD 27245 is a suspected variable star with an amplitude of 0.05 magnitudes.[6] Its variability was first observed in 1930 by Joel Stebbins.[17] However, Eggen (1967) instead lists it as an ordinary M-type giant and used the object for comparison.[18] In 1978–9, HD 28245 was again listed as a variable star but did not provide further insight.[19] As of 2017, the star has not been confirmed to be variable.[6]