HD 44506

HD 44506

A light curve for HD 44506, plotted from TESS data[1]
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Columba
Right ascension 06h 20m 36.23979s[2]
Declination −34° 08′ 38.9169″[2]
Apparent magnitude (V) 5.52[3] (5.48 - 5.55)[4]
Characteristics
Spectral type B3 V[5]
U−B color index −0.89[6]
B−V color index −0.20[6]
Variable type suspected[4]
Astrometry
Radial velocity (Rv)54±4[7] km/s
Proper motion (μ) RA: +0.641 mas/yr[2]
Dec.: +20.709 mas/yr[2]
Parallax (π)1.7701 ± 0.0990 mas[2]
Distance1,800 ± 100 ly
(560 ± 30 pc)
Absolute magnitude (MV)−3.28[8]
Details
Mass12.2±0.3[9] M☉
Radius13.5+0.1
−0.2[2] R☉
Luminosity (bolometric)18,951[10] L☉
Surface gravity (log g)3.21[2] cgs
Temperature16,838[11] K
Metallicity [Fe/H]−0.7801[2] dex
Rotational velocity (v sin i)220±22[12] km/s
Age13±2[9] Myr
Other designations
90 G. Columbae[13], CD−34°2806, CPD−34°898, GC 8180, HD 44506, HIP 30143, HR 2288, SAO 196707[14]
Database references
SIMBADdata

HD 44506 is a solitary,[15] blue hued star located in the southern constellation Columba. The object is also called HR 2288, which is its Bright Star Catalog designation. It has an average apparent magnitude of 5.52,[3] making it faintly visible to the naked eye under ideal conditions. HD 44506 is located relatively far at a distance of 1,800 light years based on Gaia DR3 parallax measurements[2] but is receding with a heliocentric radial velocity of 54 km/s.[7]

Emission lines were first noticed in HD 44506's spectrum in 1964.[16] They were again observed by Karl G. Heinze.[17] It has been suspected to be variable since 1963,[18] but a 1977 search for β Cepheids found inconclusive results; the star is variable in the visual passband but not the ultraviolet passband.[19] As of 2017, the GCVS lists HD 44506 as a suspected variable.[4] In 1982, HD 44506 was officially catalogued as a Be star by Mecerdes Jaschek and Daniel Egret.[20]

This is a hot B-type main-sequence star with a stellar classification of B3 V.[5] It has 12.2 times the mass of the Sun and is estimated to be 13 million years old. HD 44506 has a radius of 13.5 R☉ and an effective temperature of 16,838 K. This yields a bolometric luminosity 18,951 times that of the Sun from its photosphere. Like many hot stars it spins rapidly, having a projected rotational velocity of 220 km/s.[12]

  1. ^ Cite error: The named reference MAST was invoked but never defined (see the help page).
  2. ^ a b c d e f g h Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Houk1982 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Deustchman1976 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Hohle2010 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference McDonald2012 was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference Slettebak1982 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Gould1879 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 Jaschek1964 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference Henize1976 was invoked but never defined (see the help page).
  18. ^ Cite error: The named reference Cousins1963 was invoked but never defined (see the help page).
  19. ^ Cite error: The named reference Balona1977 was invoked but never defined (see the help page).
  20. ^ Cite error: The named reference Jaschek1982 was invoked but never defined (see the help page).