| Observation data EpochJ2000 EquinoxJ2000 | |
|---|---|
| Constellation | Lepus |
| Right ascension | 05h 01m 25.58117s[1] |
| Declination | −20° 03′ 06.9054″[1] |
| Apparent magnitude (V) | 4.91[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | B9V[4] |
| B−Vcolor index | −0.047±0.002[2] |
| Astrometry | |
| Radial velocity (Rv) | +24.2±2.8[2] km/s |
| Proper motion (μ) | RA: +36.377[1]mas/yr Dec.: −15.600[1]mas/yr |
| Parallax (π) | 16.5337±0.1691 mas[1] |
| Distance | 197 ± 2 ly (60.5 ± 0.6 pc) |
| Absolute magnitude (MV) | 1.00[2] |
| Details | |
| Mass | 2.56±0.02[3] or 3.24[5] M☉ |
| Radius | 3.1[6] R☉ |
| Luminosity | 46.5[2] L☉ |
| Surface gravity (log g) | 4.27±0.14[5] cgs |
| Temperature | 12,450±423[5] K |
| Rotational velocity (v sin i) | 293[5] or 302[3] km/s |
| Age | 124[5] Myr |
| Other designations | |
| BD−20°990,HD 32309,HIP 23362,HR 1621,SAO 169981[7] | |
| Database references | |
| SIMBAD | data |
HD 32309 is a single[8]star in the southernconstellation ofLepus. It has a blue-white hue and is visible to the naked eye with anapparent visual magnitude of 4.91.[2] The distance to this object is 197 light years based onparallax.[1] It is drifting further away from theSun with aradial velocity of +24 km/s.[2] This is a member of theColumba association of co-moving stars.[9]
This is aB-type main-sequence star with astellar classification of B9V.[4] It is around 124[5] million years old and is spinning rapidly with aprojected rotational velocity of about 300 km/s.[5][3] Mass estimates range from 2.56[3] to 3.24[5] times themass of the Sun and it has about 3.1[6] times theSun's radius. The star is radiating 46.5[2] times theluminosity of the Sun from itsphotosphere at aneffective temperature of 12,450 K.[5]
