HD 24479

HD 24479
Location of HD 117566 on the map (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Camelopardalis
Right ascension 03h 57m 25.44460s[1]
Declination +63° 04′ 20.1498″[1]
Apparent magnitude (V) 5.04[2]
Characteristics
Evolutionary stage main sequence[3]
Spectral type B9 IV[4] or B9.5 V[5]
U−B color index −0.16[2]
B−V color index −0.10[2]
Astrometry
Radial velocity (Rv)4.6±2.8[6] km/s
Proper motion (μ) RA: +7.146[1] mas/yr
Dec.: +6.420[1] mas/yr
Parallax (π)8.4614 ± 0.0947 mas[1]
Distance385 ± 4 ly
(118 ± 1 pc)
Absolute magnitude (MV)−0.27[7]
Details
Mass3.14±0.05[3] M☉
Radius4.08±0.20[8] R☉
Luminosity156+12
−11[3] L☉
Surface gravity (log g)3.69±0.06[9] cgs
Temperature10,520+72
−73[3] K
Metallicity [Fe/H]−0.20[10] dex
Rotational velocity (v sin i)85±16[11] km/s
Age256±20[12] Myr
Other designations
22 H. Camelopardalis,[13]AG+62°326, BD+62°628, FK5 2281, GC 4730, HD 24479, HIP 18505, HR 1204, SAO 12969[14]
Database references
SIMBADdata

HD 24479, also designated as HR 1204, is a solitary,[15] bluish-white hued star located in the northern circumpolar constellation Camelopardalis. The star is visible to the naked eye with an apparent visual magnitude of 5.04.[2] Based on Gaia DR3 parallax measurements,[1] it is located 385 light years from the Sun. However, it is receding with a somewhat constrained heliocentric radial velocity of 4.6 km/s.[6] At its current distance, HD 24479's brightness is diminished by 0.29 magnitudes due to interstellar dust.[16]

In 1932, HD 24479 was identified as a Be star by Olin C. Wilson at the Mount Wilson Observatory.[17] In 1969, astronomer Anne Cowley and her colleauges listed a stellar classification of B9.5 V,[5] matching a B-type main-sequence star. Slettebak (1982) gave it a class of B9 IV,[4] suggesting this instead an evolving subgiant star. Zorec and Royer (2012) model it to be an evolved dwarf star that has completed 85.9% of its main sequence lifetime.[3]

It has an estimated 3.14 times the mass of the Sun[3] and 4.1 times the Sun's radius,[8] which is large for its class. The star is radiating 156 times the Sun's luminosity[8] from its photosphere at an effective temperature of 10,250 K.[3] HD 24479 is estimated to be 256 million years old[12] and is spinning quickly with a projected rotational velocity of 85 km/s.[11]

  1. ^ a b c d e f Cite error: The named reference GaiaDR3 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 c d e f g Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Slettebak1982 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Cowley1969 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Kervella2004 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Anders2019 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Abt2002 was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Verbunt2010 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference Wilson1932 was invoked but never defined (see the help page).