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 Giant star [3]
Spectral type K1.5Ib [4]
U−B color index +1.38 [2]
B−V color index +1.33 [2]
Variable type microvariable [5]
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 [6]
Details
Mass 3.3±1.1 [3]   M☉
Radius 56 [7]   R☉
Luminosity 1,010±131 [3]   L☉
Surface gravity (log g)2.0 [8]   cgs
Temperature 4,245 [3]   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 star has stellar classification of K1.5Ib, [4] which would suggest it is a supergiant, but is actually a giant star according to modern studies. [3] It has about three times the mass of the Sun [3] and has expanded to around 56 times the Sun's radius. [7] The latter is equivalent to 0.26  AU. 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. [5] It is radiating around 1,010 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,245 K. [3]

References

  1. 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.
  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 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.
  4. 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.
  5. 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.
  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.
  7. 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.
  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" (PDF), 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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