Loading AI tools
M-type giant in the constellation Camelopardalis From Wikipedia, the free encyclopedia
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.[2] 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.[5] 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.[6]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Camelopardalis |
Right ascension | 04h 06m 03.18286s[1] |
Declination | +68° 40′ 47.8990″[1] |
Apparent magnitude (V) | 5.86±0.01[2] |
Characteristics | |
Spectral type | M0 III[3] |
B−V color index | +1.54[4] |
Astrometry | |
Radial velocity (Rv) | −48.23±0.26[5] km/s |
Proper motion (μ) | RA: +7.555 mas/yr[1] Dec.: +2.938 mas/yr[1] |
Parallax (π) | 5.4653 ± 0.0455 mas[1] |
Distance | 597 ± 5 ly (183 ± 2 pc) |
Absolute magnitude (MV) | −0.51[6] |
Details | |
Radius | 59.8+1.6 −1.5[7] or 39.6+1.2 −5.9[1] R☉ |
Luminosity | 762+26 −22[1] 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 | |
Database references | |
SIMBAD | data |
HD 25274 has a stellar classification of M0 III,[3] 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.[1] The object radiates 762 times the luminosity of the Sun[1] 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]
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.