HD 79917

Last updated
HD 79917
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Vela
Right ascension 09h 15m 36.7081s [1]
Declination −38° 34 11.7903 [1]
Apparent magnitude  (V)+4.92 [2]
Characteristics
Spectral type K1III [3]
B−V color index 1.084±0.052 [2]
Astrometry
Radial velocity (Rv)+1.62±0.14 [1]  km/s
Proper motion (μ)RA: −71.004±0.148 [1]   mas/yr
Dec.: −10.527±0.186 [1]   mas/yr
Parallax (π)14.3202 ± 0.1227 [1]   mas
Distance 228 ± 2  ly
(69.8 ± 0.6  pc)
Absolute magnitude  (MV)+0.73 [2]
Details
Radius 12.63+0.23
−0.36
[1]   R
Luminosity 66.8±0.7 [1]   L
Temperature 4,643+69
−43
[1]   K
Other designations
l Vel, CD−38°5408, FK5  2737, HD  79917, HIP  45439, HR  3682, SAO  200159 [4]
Database references
SIMBAD data

HD 79917 is a single [5] star in the southern constellation of Vela. It has the Bayer designation l (lower case L) Velorum, while HD 79917 is the star's identifier from the Henry Draper catalogue . The star has an orange hue and is faintly visible to the naked eye with an apparent visual magnitude of +4.92. [2] It is located at a distance of approximately 228  light years from the Sun based on parallax, and is drifting further away with a radial velocity of +1.6 km/s. [1]

This is an aging giant star with a stellar classification of K1III, [3] having exhausted is core hydrogen then cooled and expanded off the main sequence. It has 12.6 times the girth of the Sun and is radiating 67 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,643 K. [1]

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HD 75710 is a single star in the constellation of Vela. It has an apparent visual magnitude of approximately 4.94, which is bright enough to be faintly visible to the naked eye. Based upon an annual parallax shift of 2.7 mas, it is located about 1,200 light years from the Sun.

HD 133683 is a single star in the southern constellation of Triangulum Australe. It has a yellow-white hue and is dimly visible to the naked eye with an apparent visual magnitude of +5.76. The distance to this star is approximately 3,600 light years based on parallax, but it is drifting closer with a radial velocity of −14.7 km/s.

18 Sagittarii is a single star in zodiac constellation of Sagittarius, located around 550 light years away from the Sun based on parallax. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 5.58. This object is moving closer to the Earth with a heliocentric radial velocity of −19 km/s.

HD 101570 is a single star in the southern constellation of Centaurus. It has a yellow hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.93. The star is located at a distance of approximately 1,120 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +18 km/s. It has an absolute magnitude of −2.24.

HD 22663 is a candidate astrometric binary star system in the equatorial constellation of Eridanus. It is visible to the naked eye with an apparent visual magnitude of 4.57. Based upon an annual parallax shift of 14.2 mas, it is located around 230 light years from the Sun. It is moving further away from the Earth with a heliocentric radial velocity of +11.5 km/s, having come within 140.9 ly some 3.76 million years ago.

HD 143009 is a single star in the southern constellation of Lupus. It has an orange hue and is visible to the naked eye with an apparent visual magnitude of 4.99. The star lies at a distance of approximately 380 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −27 km/s. It has an absolute magnitude of −0.64.

HD 115211 is a single star in the southern constellation of Musca. It has an orange hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.86. The distance to this star is approximately 1,370 light years based on parallax, and it is drifting closer to the Sun with a radial velocity of −10 km/s. It has an absolute magnitude of −2.94.

HD 163145 is a single star in the constellation Scorpius, near the southeast constellation border with Corona Australis. It has an orange hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.85. Based on parallax measurements, it is located at a distance of approximately 307 light years from the Sun. The star is drifting further away with a radial velocity of +35.6 km/s, having come to within 49.2 light-years of the Sun some 1.871 million years ago. It has an absolute magnitude of 0.12.

References

  1. 1 2 3 4 5 6 7 8 9 10 11 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. 1 2 3 4 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
  3. 1 2 Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, 3, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1982mcts.book.....H.
  4. "HD 79917". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2020-01-25.
  5. 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.