GZ Velorum
Star in the constellation Vela
From Wikipedia, the free encyclopedia
GZ Velorum is a single,[11] 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.[2] The star is located around 1,300 light years from Earth, as determined from its annual parallax shift of 2.4 mas.[1] It is moving further away with a heliocentric radial velocity of +13 km/s.[5]
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Vela |
| Right ascension | 10h 19m 36.75198s[1] |
| Declination | −55° 01′ 45.4852″[1] |
| Apparent magnitude (V) | 4.578[2] |
| Characteristics | |
| Spectral type | K2.5 II[3] |
| B−V color index | +1.635[2] |
| Variable type | LC[4] |
| Astrometry | |
| Radial velocity (Rv) | +12.9±0.8[5] km/s |
| Proper motion (μ) | RA: −13.208[1] mas/yr Dec.: +1.232[1] mas/yr |
| Parallax (π) | 2.4256±0.1938 mas[1] |
| Distance | 1,300 ± 100 ly (410 ± 30 pc) |
| Absolute magnitude (MV) | −4.16[6] |
| Details | |
| Mass | 8.9±0.5[7] M☉ |
| Radius | 136[8] R☉ |
| Luminosity | 2,679 - 2,780[8] L☉ |
| Surface gravity (log g) | 2.0[9] cgs |
| Temperature | 3,986[8] K |
| Metallicity [Fe/H] | −0.4[9] dex |
| Rotational velocity (v sin i) | 2.0[9] km/s |
| Age | 29.6±3.8[7] Myr |
| Other designations | |
| GZ Vel, CD−54°3415, FK5 2830, HD 89682, HIP 50555, HR 4063, SAO 237916[10] | |
| Database references | |
| SIMBAD | data |
This is a bright giant star with a stellar classification of K2.5 II.[3] The star was found to be a variable star when the Hipparcos data was analyzed, in 1996.[13] It is a slow irregular variable of type LC[4] with a frequency of 0.16585 cycles per day.[14] In the R (red) band, the magnitude of the star ranges from 3.43 down to 3.81.[4] The measured angular diameter of this star, after correction for limb darkening, is 3.17±0.04 mas.[15] At the estimated distance of GZ Vel, this yields a physical size of about 140 times the radius of the Sun.[16]
GZ Vel is 30 million years old with 9 times the mass of the Sun.[7] It is radiating 9,241[2] times the Sun's luminosity from its photosphere at an effective temperature of 4,140 K.[2]
