HD 25291

HD 25291
location of HD 25291 in red
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Camelopardalis
Right ascension 04h 04m 27.16294s[1]
Declination +59° 09′ 19.8327″[1]
Apparent magnitude (V) 5.12[2]
Characteristics
Spectral type F0 II[3]
U−B color index +0.47[2]
B−V color index +0.15[2]
Variable type constant[4]
Astrometry
Radial velocity (Rv)−20.3±0.8[5] km/s
Proper motion (μ) RA: −3.380 mas/yr[1]
Dec.: +1.027 mas/yr[1]
Parallax (π)1.5558 ± 0.1047 mas[1]
Distance2,100 ± 100 ly
(640 ± 40 pc)
Absolute magnitude (MV)−3.91[6]
Details
Mass8.78±0.65[7] M☉
Radius50.1[8] R☉
Luminosity (bolometric)9,878[7] L☉
Surface gravity (log g)1.87[9] cgs
Temperature7,425[7] K
Metallicity [Fe/H]−0.07[9] dex
Rotational velocity (v sin i)6.8±2[10] km/s
Age32[9] Myr
Other designations
AG+59°399, BD+58°690, FK5 2290, GC 4858, HD 25291, HIP 19018, HR 1242, SAO 24384[11]
Database references
SIMBADdata

HD 25291, also known as HR 1242, is a solitary,[12] yellowish-white hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.12,[2] making it one of the brighter members of this generally faint constellation. The object is relatively far at a distant of approximately 2,100 light years[1] but is drifting closer with a heliocentric radial velocity of −20.3 km/s.[5]

HD 25291 has a general stellar classification of F0 II,[3] which indicates that it is an evolved early F-type bright giant. It has also been given a class of F2 Ia,[13] instead suggesting a slightly cooler and more luminous supergiant. Nevertheless, it has 8.8 times the mass of the Sun[7] but at an age of 32 million years,[9] it has expanded to 50.1 times its girth.[8] It radiates at a bolometric luminosity 9,878 times greather that of the Sun from its enlarged photosphere at an effective temperature of 7,425 K.[7] HD 25291 is slightly metal deficient, with an iron abundance 85% of solar levels.[9] It spins modestly with a projected rotational velocity of 6.8 km/s.[9]

Tetzlaff et al. (2011) found the object to be a runaway star with a peculiar velocity of 25.7+1.9
−4.1 km/s, which is high compared to neighboring stars.[14]

  1. ^ a b c d e Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Ducati2002 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Gray2001 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Adelman2000 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c d e Cite error: The named reference Hohle2010 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  9. ^ a b c d e f Cite error: The named reference Lyubimkov2014 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference De Medeiros2014 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Hardorp1959 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).