HR 3407

Last updated
HR 3407
Observation data
Epoch J2000       Equinox J2000
Constellation Vela
Right ascension 08h 34m 43.59703s [1]
Declination –49° 56′ 39.1359″ [1]
Apparent magnitude  (V)5.01 [2]
Characteristics
Evolutionary stage supergiant
Spectral type K1.5Ib [3]
U−B color index +1.38 [2]
B−V color index +1.33 [2]
Variable type microvariable [4]
Astrometry
Radial velocity (Rv)4.25±0.17 [1]  km/s
Proper motion (μ)RA: −14.236±0.322 [1]   mas/yr
Dec.: 18.540±0.353 [1]   mas/yr
Parallax (π)3.1501 ± 0.1571  mas [1]
Distance 1,040 ± 50  ly
(320 ± 20  pc)
Absolute magnitude  (MV)–2.06 [5]
Details
Mass 3.3±1.1 [6]   M☉
Radius 73 [7]   R☉
Luminosity 34.36 - 38.02 [7]   L☉
Surface gravity (log g)2.0 [8]   cgs
Temperature 3,745±170 [7]   K
Metallicity [Fe/H]−0.4 [8]   dex
Rotational velocity (v sin i)4.1 [8]  km/s
Other designations
C Vel, CD−49°3646, FK5  2674, HD  73155, HIP  42088, HR  3407, SAO  220138 [9]
Database references
SIMBAD data

HR 3407 is a single [10] star in the southern constellation of Vela. It has the Bayer designation C Velorum; HR 3407 is the designation in the Bright Star Catalogue . [9] It is an orange-hued star that is dimly visible to the naked eye with an apparent visual magnitude of 5.01. [2] The distance to this object is approximately 1,040  light years based on parallax measurements, and it is drifting further away with a radial velocity of 4 km/s. [1]

This object is an aging K-type supergiant star with a stellar classification of K1.5Ib. [3] It has about three [6] times the mass of the Sun and has expanded to around 71 [1] times the Sun's radius. The latter is equivalent to 0.33  AU, or about one third the distance from the Sun to the Earth. It is spinning with a projected rotational velocity of 4.1. [8] The star displays microvariability with a period of 10.99 cycles per day and an amplitude of 0.0036 in magnitude. [4] It is radiating around 1,600 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,324 K. [1]

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References

  1. 1 2 3 4 5 6 7 8 9 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 Hoffleit, D.; Warren, W. H. (1995), "Bright Star Catalogue", VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H, 5050 (5th Revised ed.), Bibcode:1995yCat.5050....0H.
  3. 1 2 Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins Catalog of Revised MK Types for the Cooler Stars", The Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373, S2CID   123149047.
  4. 1 2 Koen, Chris; Eyer, Laurent (2002), "New periodic variables from the Hipparcos epoch photometry", Monthly Notices of the Royal Astronomical Society, 331 (1): 45–59, arXiv: astro-ph/0112194 , Bibcode:2002MNRAS.331...45K, doi: 10.1046/j.1365-8711.2002.05150.x , S2CID   10505995.
  5. ↑ 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.
  6. 1 2 Stello, D.; et al. (2008), "Oscillating K Giants with the WIRE Satellite: Determination of Their Asteroseismic Masses", The Astrophysical Journal Letters, 674 (1): L53–L56, arXiv: 0801.2155 , Bibcode:2008ApJ...674L..53S, doi:10.1086/528936, S2CID   15094067.
  7. 1 2 3 Messineo, M.; Brown, A. G. A. (2019). "A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2". The Astronomical Journal. 158 (1): 20. arXiv: 1905.03744 . Bibcode:2019AJ....158...20M. doi: 10.3847/1538-3881/ab1cbd . S2CID   148571616.
  8. 1 2 3 4 Lèbre, A.; de Laverny, P.; Do Nascimento, J. D. Jr.; de Medeiros, J. R. (May 2006), "Lithium abundances and rotational behavior for bright giant stars", Astronomy and Astrophysics, 450 (3): 1173–1179, Bibcode:2006A&A...450.1173L, doi: 10.1051/0004-6361:20053485 .
  9. 1 2 "C Vel". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2019-12-04.
  10. ↑ 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.
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