HD 76270

HD 76270
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Volans
Right ascension 08h 49m 50.12604s[1]
Declination −72° 33′ 04.4601″[1]
Apparent magnitude (V) 6.10±0.01[2]
Characteristics
Spectral type A5 III/IV[3]
U−B color index +0.17[4]
B−V color index +0.20[4]
Astrometry
Radial velocity (Rv)−2.6±1.1[5] km/s
Proper motion (μ) RA: −6.191 mas/yr[1]
Dec.: +8.368 mas/yr[1]
Parallax (π)1.3842 ± 0.0201 mas[1]
Distance2,360 ± 30 ly
(720 ± 10 pc)
Details
Mass5.3[6] M☉
Radius22.9[7] R☉
Luminosity1,464±55[8] L☉
Surface gravity (log g)2.27[9] cgs
Temperature8,121±123[7] K
Metallicity [Fe/H]−0.44[10] dex
Other designations
44 G. Volantis[11], CD−72°488, CPD−72°747, GC 12252, HD 76720, HIP 35541, HR 3544, SAO 256556[12]
Database references
SIMBADdata

HD 76270, also known as HR 3544, is a solitary, white hued star located in the southern circumpolar constellation Volans. It has an apparent magnitude of 6.10,[2] making it faintly visible to the naked eye if viewed under ideal conditions. The object is relatively far with a distance of 2,360 light years,[1] but is slowly approaching the Solar System with a heliocentric radial velocity of −2.6 km/s.[5]

HD 76270 was considered as a chemically peculiar Am star, and as a result, was given a spectral classification of A3mA6-7[3] by Nancy Houk and A.P Cowley. This means it is an A3 star with the metallic lines of a star with a class of A6-7. However, this peculiarity is now considered doubtful.[13] An alternate class of A5 III/IV[3] was given, instead making it an evolved A-type star with a blended luminosity class of a subgiant and a giant star.

At present it has 5.3 times the mass of the Sun[6] but has expanded to 22.9 times its girth.[7] It shines with a high luminosity of 1,464 L☉[8] from its enlarged photosphere at an effective temperature of 8,121 K.[7] HR 3544 is metal deficient, having an iron abundance 64% below solar levels.[10] A 1984 study used HD 76270 as a comparison star and suspected it of being slightly variable,[14] but this has not been confirmed and it is not even listed as a suspected variable in the General Catalogue of Variable Stars.[15]

  1. ^ a b c d e 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 c Cite error: The named reference Houk1975 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Johnson1966 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. ^ a b Cite error: The named reference Kervella2021 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Anders2022 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Hauck1980 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Gould1879 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 Renson2009 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference hensberge1984 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference gcvs was invoked but never defined (see the help page).