  | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Camelopardalis [1] |
| Right ascension | 04h 06m 03.18286s [2] |
| Declination | +68° 40′ 47.8990″ [2] |
| Apparent magnitude (V) | 5.86±0.01 [3] |
| Characteristics | |
| Spectral type | M0 III [4] |
| B−V color index | +1.54 [5] |
| Astrometry | |
| Radial velocity (Rv) | −48.23±0.26 [6] km/s |
| Proper motion (μ) | RA: +7.555 mas/yr [2] Dec.: +2.938 mas/yr [2] |
| Parallax (π) | 5.4653±0.0455 mas [2] |
| Distance | 597 ± 5 ly (183 ± 2 pc) |
| Absolute magnitude (MV) | −0.51 [1] |
| Details | |
| Radius | 59.8+1.6 −1.5 [7] or 39.6+1.2 −5.9 [2] R☉ |
| Luminosity | 762+26 −22 [2] L☉ |
| Surface gravity (log g) | 1.22 [8] cgs |
| Temperature | 3,985±122 [9] K |
| Metallicity [Fe/H] | −0.21±0.09 [10] dex |
| Rotational velocity (v sin i) | 2.2±1.2 [11] km/s |
| Other designations | |
| AG+68°213, BD+68°303, FK5 2291, GC 4874, HD 25274, HIP 19129, HR 1241, SAO 13006 [12] | |
| Database references | |
| SIMBAD | data |
HD 25274, also known as HR 1241, is a solitary star [13] located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye as a red hued point of light with an apparent magnitude of 5.86. [3] Gaia DR3 parallax measurements imply a distance of 597 light-years and it is currently drifting closer with a heliocentric radial velocity of −48.23 km/s . [6] At its current distance, HD 25274's brightness is diminished by three-tenths of a magnitude due to interstellar extinction [14] and it has an absolute magnitude of −0.51. [1]
HD 25274 has a stellar classification of M0 III, [4] indicating that it is an evolved red giant. However, the Bright Star Catalog gives a hotter classification of K2 III. [15] The spectrophotometry-measured angular diameter, after correcting for limb darkening, is 2.02±0.03 mas . [16] At the estimated distance for HD 25274, this yields a physical radius 39.8 times that of the Sun. [17] It also has an empirical radius of 48.1 R☉ [7] and Gaia DR3 models a larger radius. [2] The object radiates 762 times the luminosity of the Sun [2] from its enlarged photosphere at an effective temperature of 3,985 K . [9] HD 25274 is metal deficient with an iron abundance 62% that of the Sun's ([Fe/H] = −0.21) [10] and it spins modestly with a projected rotational velocity of 2.2 km/s . [11] HD 25274 is a field star of the HIP 21974 cluster. [18]
