HR 3407

This article is about C Velorum. For c Velorum, see HD 78004.
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]
Distance1,040 ± 50 ly
(320 ± 20 pc)
Absolute magnitude (MV)–2.06[5]
Details
Mass3.3±1.1[6] M☉
Radius73[7] R☉
Luminosity34.36 - 38.02[7] L☉
Surface gravity (log g)2.0[8] cgs
Temperature3,745±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
SIMBADdata

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]

  1. ^ a b c d e f g h i Cite error: The named reference dr2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference bsc was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference perkins was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference koen2002 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference xhip was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference apjl674_1_L53 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference messinio was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference Lèbre2006 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).