GZ Velorum

GZ Velorum

An R band light curve for GZ Velorum, adapted from Kallinger (2019)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Vela
Right ascension 10h 19m 36.75198s[2]
Declination −55° 01′ 45.4852″[2]
Apparent magnitude (V) 4.578[3]
Characteristics
Spectral type K2.5 II[4]
B−V color index +1.635[3]
Variable type LC[5]
Astrometry
Radial velocity (Rv)+12.9±0.8[6] km/s
Proper motion (μ) RA: −13.208[2] mas/yr
Dec.: +1.232[2] mas/yr
Parallax (π)2.4256 ± 0.1938 mas[2]
Distance1,300 ± 100 ly
(410 ± 30 pc)
Absolute magnitude (MV)−4.16[7]
Details
Mass8.9±0.5[8] M☉
Radius136[9] R☉
Luminosity2,679 - 2,780[9] L☉
Surface gravity (log g)2.0[10] cgs
Temperature3,986[9] K
Metallicity [Fe/H]−0.4[10] dex
Rotational velocity (v sin i)2.0[10] km/s
Age29.6±3.8[8] Myr
Other designations
GZ Vel, CD−54° 3415, FK5 2830, HD 89682, HIP 50555, HR 4063, SAO 237916[11]
Database references
SIMBADdata

GZ Velorum is a single,[12] orange-hued star in the southern constellation of Vela. It is a faint star but visible to the naked eye, having an apparent visual magnitude of 4.58.[3] The star is located around 1,300 light years from Earth, as determined from its annual parallax shift of 2.4 mas.[2] It is moving further away with a heliocentric radial velocity of +13 km/s.[6]

This is a bright giant star with a stellar classification of K2.5 II.[4] It is a slow irregular variable of type LC[5] with a frequency of 0.16585 cycles per day.[13] In the R (red) band, the magnitude of the star ranges from 3.43 down to 3.81.[5] The measured angular diameter of this star, after correction for limb darkening, is 3.17±0.04 mas.[14] At the estimated distance of GZ Vel, this yields a physical size of about 140 times the radius of the Sun.[15]

GZ Vel is 30 million years old with 9 times the mass of the Sun.[8] It is radiating 9,241[3] times the Sun's luminosity from its photosphere at an effective temperature of 4,140 K.[3]

  1. ^ Cite error: The named reference Kallinger was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference Hohle2010 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference perkins1989 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference gcvs was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  9. ^ a b c 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.
  10. ^ a b c Cite error: The named reference Lèbre2006 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference fuhrmann2017 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Koen2002 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Richichi2005 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference lang2006 was invoked but never defined (see the help page).