HD 25274

HD 25274
Location of HD 25274 on the map (circled)
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]
Distance597 ± 5 ly
(183 ± 2 pc)
Absolute magnitude (MV)−0.51[6]
Details
Radius59.8+1.6
−1.5[7] or 39.6+1.2
−5.9[1] R☉
Luminosity762+26
−22[1] L☉
Surface gravity (log g)1.22[8] cgs
Temperature3,985±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
SIMBADdata

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]

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]

  1. ^ a b c d e f g h Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Wilson1950 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Haggkvist1970 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Famaey2005 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Kervella2022 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference McDonald2017 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference taylor1999 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference deMed1999 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Hoffleit1991 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Richichi2005 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference lang2006 was invoked but never defined (see the help page).
  18. ^ Cite error: The named reference CanatGaudin2018 was invoked but never defined (see the help page).