HR 3407

HR 3407
Observation data
Epoch J2000      Equinox ICRS
Constellation Vela
Right ascension 08h 34m 43.59703s
Declination −49° 56′ 39.1359″
Apparent magnitude (V) 5.01
Characteristics
Evolutionary stage Giant star
Spectral type K1.5Ib
U−B color index +1.38
B−V color index +1.33
Variable type microvariable
Astrometry
Radial velocity (Rv)4.25±0.17 km/s
Proper motion (μ) RA: −14.236±0.322 mas/yr
Dec.: +18.540±0.353 mas/yr
Parallax (π)3.1501±0.1571 mas
Distance1,040 ± 50 ly
(320 ± 20 pc)
Absolute magnitude (MV)–2.06
Details
Mass3.3±1.1 M☉
Radius56 R☉
Luminosity1,010±131 L☉
Surface gravity (log g)2.0 cgs
Temperature4,245 K
Metallicity [Fe/H]−0.4 dex
Rotational velocity (v sin i)4.1 km/s
Other designations
C Vel, CD−49°3646, FK5 2674, HD 73155, HIP 42088, HR 3407, SAO 220138
Database references
SIMBADdata

HR 3407 is a single star in the southern constellation of Vela. It has the Bayer designation C Velorum; HR 3407 is the designation in the Bright Star Catalogue. It is an orange-hued star that is dimly visible to the naked eye with an apparent visual magnitude of 5.01. 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.

This star has stellar classification of K1.5Ib, which would suggest it is a supergiant, but is actually a giant star according to modern studies. It has about three times the mass of the Sun and has expanded to around 56 times the Sun's radius. The latter is equivalent to 0.26 AU. It is spinning with a projected rotational velocity of 4.1. The star displays microvariability with a period of 10.99 cycles per day and an amplitude of 0.0036 in magnitude. It is radiating around 1,010 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,245 K.

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
  2. 1 2 3 4 5 6 7 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.
  3. 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.
  4. 1 2 3 4 5 6 7 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.
  5. 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.
  6. 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.
  7. ↑ 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.
  8. 1 2 McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017-10-01), "Fundamental parameters and infrared excesses of Tycho-Gaia stars", Monthly Notices of the Royal Astronomical Society, 471: 770–791, arXiv:1706.02208, Bibcode:2017MNRAS.471..770M, doi:10.1093/mnras/stx1433, ISSN 0035-8711 HR 3407's database entry at VizieR.
  9. 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" (PDF), Astronomy and Astrophysics, 450 (3): 1173–1179, Bibcode:2006A&A...450.1173L, doi:10.1051/0004-6361:20053485.
  10. 1 2 "C Vel". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-12-04.
  11. ↑ 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.