HD 73468

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HD 73468
Observation data
Epoch J2000      Equinox J2000
Constellation Volans
Right ascension 08h 32m 41.77s[1]
Declination −73° 21′ 24.44″[1]
Apparent magnitude (V) 6.10±0.01[2]
Characteristics
Spectral type G8III[3]
B−V color index 0.946±0.003[4]
Astrometry
Radial velocity (Rv)−25.75±0.15[1] km/s
Proper motion (μ) RA: −55.146[1] mas/yr
Dec.: 73.026[1] mas/yr
Parallax (π)7.8224 ± 0.0272[1] mas
Distance417 ± 1 ly
(127.8 ± 0.4 pc)
Absolute magnitude (MV)+0.69[5]
Details
Mass1.97[6] M☉
Radius10.4±0.1[1] R☉
Luminosity62±0.3[1] L☉
Surface gravity (log g)2.85[7] cgs
Temperature5012+37
−38[1] K
Metallicity [Fe/H]−0.14[7] dex
Rotational velocity (v sin i)2.1±1.3[8] km/s
Other designations
CD−72 471, HD 73468, HIP 41907, HR 3417, SAO 256524
Database references
SIMBADdata

HD 73468(HR 3417) is a solitary star in the southern constellation Volans. With an apparent magnitude of 6.1, it can be only viewed under dark skies. The star is located 417 light-years (128 pc) based on parallax, but is drifting closer with a radial velocity of -25 km/s.

Properties[]

HD 73468 is a star with a classification of “G8III”, which suggests it is a giant star that has left the main sequence and exhausted hydrogen at its core. It has nearly double the Sun’s mass, but has expanded to 10 times the Sun’s radius. It radiates 62 times the Sun’s luminosity from its swollen photosphere at an effective temperature of 5,012 K. HD 73468 is metal-deficient, with 72% the abundance of heavy metals compared to the Sun, and has a projected rotational velocity of 2.1 km/s

See also[]

References[]

  1. ^ a b c d e f g h Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 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. (2000-03-01). "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. ^ 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_f0". University of Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume I. Declinations -90_ to -53_f0., by Houk, N.; Cowley, A. P.. Ann Arbor, MI (USA): Department of Astronomy, University of Michigan, 19 + 452 P. Bibcode:1975mcts.book.....H.
  4. ^ ESA (1997). "The HIPPARCOS and TYCHO catalogues. Astrometric and photometric star catalogues derived from the ESA HIPPARCOS Space Astrometry Mission". Esa Special Publication. 1200. Bibcode:1997ESASP1200.....E.
  5. ^ Anderson, E.; Francis, Ch. (2012-05-01). "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 119257644.
  6. ^ Stassun, Keivan G.; Oelkers, Ryan J.; Pepper, Joshua; Paegert, Martin; De Lee, Nathan; Torres, Guillermo; Latham, David W.; Charpinet, Stéphane; Dressing, Courtney D.; Huber, Daniel; Kane, Stephen R. (2018-09-01). "The TESS Input Catalog and Candidate Target List". The Astronomical Journal. 156 (3): 102. arXiv:1706.00495. Bibcode:2018AJ....156..102S. doi:10.3847/1538-3881/aad050. ISSN 0004-6256. S2CID 73582386.
  7. ^ a b Alves, S.; Benamati, L.; Santos, N. C.; Adibekyan, V. Zh.; Sousa, S. G.; Israelian, G.; De Medeiros, J. R.; Lovis, C.; Udry, S. (2015-04-01). "Determination of the spectroscopic stellar parameters for 257 field giant stars*". Monthly Notices of the Royal Astronomical Society. 448: 2749–2765. arXiv:1503.02556. Bibcode:2015MNRAS.448.2749A. doi:10.1093/mnras/stv189. ISSN 0035-8711.
  8. ^ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014-01-01). "A catalog of rotational and radial velocities for evolved stars. V. Southern stars". Astronomy and Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. ISSN 0004-6361. S2CID 54046583.
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