HD 89998 (r Velorum) is a single[8] star in the southern constellation of Vela. It is a faint star but visible to the naked eye with an apparent visual magnitude of 4.82.[2] The distance to HD 89998, as determined from its annual parallax shift of 15.9 mas,[1] is 205 light years. The star is moving further from the Earth with a heliocentric radial velocity of +21 km/s,[4] having come within 140 ly some 1.552 million years ago.[2]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Vela |
Right ascension | 10h 22m 19.58477s[1] |
Declination | −41° 38′ 59.8592″[1] |
Apparent magnitude (V) | 4.82[2] |
Characteristics | |
Spectral type | K1 III[3] |
B−V color index | 1.095±0.055[2] |
Astrometry | |
Radial velocity (Rv) | +20.9±0.8[4] km/s |
Proper motion (μ) | RA: −27.664[1] mas/yr Dec.: +60.090[1] mas/yr |
Parallax (π) | 15.9154 ± 0.1375 mas[1] |
Distance | 205 ± 2 ly (62.8 ± 0.5 pc) |
Absolute magnitude (MV) | 0.84[2] |
Details | |
Radius | 11.6[5] R☉ |
Luminosity | 54.04[6] L☉ |
Temperature | 4,812[6] K |
Other designations | |
Database references | |
SIMBAD | data |
This is an evolved giant star with a stellar classification of K1 III.[3] The measured angular diameter of this star, after correcting for limb darkening, is 1.72±0.02 mas.[9] At the estimated distance of this star, this yields a physical size of 11.6 times the radius of the Sun.[5] It is radiating 54[6] times the Sun's luminosity from its enlarged photosphere at en effective temperature of 4,812 K.[6]