Article · Wikipedia archive · Last revised Aug 6, 2026

HD 64484

HD 64484 is a solitary star in the southern circumpolar constellation Volans. With an apparent magnitude of 5.76, it is faintly visible to the naked eye under dark skies. Parallax measurements place it at a distance of 458 light years but is receding with a heliocentric radial velocity of 11 km/s.

Last revised
Aug 6, 2026
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HD 64484
Observation data
Epoch J2000      Equinox ICRS
Constellation Volans
Right ascension 07h 49m 40.9911s1
Declination −66° 11′ 45.504″1
Apparent magnitude (V) 5.76±0.012
Characteristics
Evolutionary stage main sequence3
Spectral type B9 V4
U−B color index −0.165
B−V color index −0.045
Astrometry
Radial velocity (Rv)11±4.36 km/s
Proper motion (μ) RA: −2.037 mas/yr1
Dec.: −0.411 mas/yr1
Parallax (π)7.1191±0.0628 mas1
Distance458 ± 4 ly
(140 ± 1 pc)
Absolute magnitude (MV)−0.117
Details
Mass2.80±0.138 M☉
Radius3.3±0.38 R☉
Luminosity140±83 L☉
Surface gravity (log g)3.86±0.069 cgs
Temperature10,544±483 K
Metallicity [Fe/H]0.0010 dex
Rotational velocity (v sin i)15411 km/s
Age339+50
−448 Myr
Other designations
19 G. Volantis, CPD−65°827, FK5 2610, GC 10628, HD 64484, HIP 38210, HR 3081, SAO 249978
Database references
SIMBADdata

HD 64484 (HR 3081) is a solitary12 star in the southern circumpolar constellation Volans. With an apparent magnitude of 5.76,2 it is faintly visible to the naked eye under dark skies. Parallax measurements place it at a distance of 458 light years1 but is receding with a heliocentric radial velocity of 11 km/s.6

HD 64484 has a stellar classification of B9 V,4 indicating that it is an ordinary B-type main-sequence star. It has 2.8 times the mass of the Sun8 and an effective temperature of 10,544 K,3 giving it a bluish white hue. However, a slightly enlarged radius of 3.3 R☉8 yields a luminosity 140 times that of the Sun.3 This is due to HD 64484 completing 80.6% of its main sequence3 lifetime at an age of 339 million years.8 The star has a solar metallicity10 and like many hot stars — spins rapidly with a projected rotational velocity of 154 km/s.11

References

References

  1. Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
  3. Zorec, J.; Royer, F. (January 2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. ISSN 0004-6361. S2CID 55586789.
  4. Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0. Bibcode:1975mcts.book.....H.
  5. Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode:1966CoLPL...4...99J.
  6. Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. ISSN 1063-7737. S2CID 119231169.
  7. Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN 1063-7737. S2CID 255204555.
  8. Bochanski, John J.; Faherty, Jacqueline K.; Gagné, Jonathan; Nelson, Olivia; Coker, Kristina; Smithka, Iliya; Desir, Deion; Vasquez, Chelsea (13 March 2018). "Fundamental Properties of Co-moving Stars Observed by Gaia". The Astronomical Journal. 155 (4): 149. arXiv:1801.00537. Bibcode:2018AJ....155..149B. doi:10.3847/1538-3881/aaaebe. ISSN 0004-6256. S2CID 119256051.
  9. Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. ISSN 0004-6256.
  10. Gontcharov, G. A. (December 2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. ISSN 0320-0108. S2CID 255201789.
  11. Levato, H.; Grosso, M. (June 2004). "New Projected Rotational Velocities of All Southern B-type Stars of the Bright Star Catalogue". Astronomical Society of the Pacific. 215: 51. Bibcode:2004IAUS..215...51L.
  12. Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.