HD 73634

Last updated
HD 73634
Observation data
Epoch J2000.0 (ICRS)       Equinox J2000.0 (ICRS)
Constellation Vela
Right ascension 08h 37m 38.63278s [1]
Declination −42° 59 20.6894 [1]
Apparent magnitude  (V)+4.11 [2]
Characteristics
Spectral type A7Ia [3] or A6II [4]
B−V color index 0.109±0.011 [2]
Astrometry
Radial velocity (Rv)+19.3±0.6 [2]  km/s
Proper motion (μ)RA: −10.75±0.13 [1]   mas/yr
Dec.: +9.66±0.12 [1]   mas/yr
Parallax (π)1.79 ± 0.15 [1]   mas
Distance 1,800 ± 200  ly
(560 ± 50  pc)
Absolute magnitude  (MV)−4.61 [2]
Details
Mass 7.8±0.2 [5]   M
Radius 33.69+2.42
−3.24
[6]   R
Luminosity 4,140.2±594.5 [6]   L
Temperature 7,977+415
−271
[6]   K
Age 39.8±4.9 [5]   Myr
Other designations
e Vel, CD−42°4451, FK5  324, GC  11852, HD  73634, HIP  42312, HR  3426, SAO  220204 [7]
Database references
SIMBAD data

HD 73634 is a single [8] star in the southern constellation of Vela. It has the Bayer designation e Velorum; HD 73634 is the star's designation from the Henry Draper Catalogue . The star is white in hue and is faintly visible to the naked eye, having an apparent visual magnitude of +4.11. [2] Parallax measurements provide a distance estimate of approximately 1,800  light years from the Sun. It is drifting further away with a radial velocity of +19 km/s. [2]

This evolved object has received stellar classifications of A7Ia [3] and A6II, [4] indicating that it is a massive supergiant or bright giant star. It has 7.8 times the mass of the Sun and is around 40 million years old. [5] The star has expanded to nearly 34 times the girth of the Sun and is radiating around 4,140 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 7,977 K. [6]

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Epsilon Crateris Star in the constellation Crater

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17 Persei Star in the constellation Perseus

17 Persei is a single star in the northern constellation of Perseus, located about 390 light years away from the Sun. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.53. This object is moving further from the Earth at a heliocentric radial velocity of +13 km/s.

HD 163376 is a single star in the southern constellation of Scorpius. It has a rudy hue and is faintly visible to the naked eye with an apparent visual magnitude is 4.88. The distance to this star, as determined using parallax measurements, is approximately 450 light years. It is drifting further from the Sun with a radial velocity of about 4 km/s. The absolute magnitude of this star is −0.82.

References

  1. 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy & Astrophysics. 474 (2): 653–664. arXiv: 0708.1752 . Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID   18759600. Vizier catalog entry
  2. 1 2 3 4 5 6 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID   119257644.
  3. 1 2 Stephenson, C. B.; Sanduleak, N. (1971). "Luminous stars in the Southern Milky Way". Publication of the Warner and Swasey Observatory. Cleveland, Ohio: Case Western Reserve University. 1: 1. Bibcode:1971PW&SO...1a...1S.
  4. 1 2 Gray, R. O.; Garrison, R. F. (1989). "The Late A-Type Stars: Refined MK Classification, Confrontation with Stroemgren Photometry, and the Effects of Rotation". The Astrophysical Journal Supplement Series. 70: 623. Bibcode:1989ApJS...70..623G. doi:10.1086/191349.
  5. 1 2 3 Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (January 2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410 (1): 190–200. arXiv: 1007.4883 . Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x. S2CID   118629873.
  6. 1 2 3 4 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.
  7. "e Vel". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2020-01-08.
  8. 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.