| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Hydra[1] |
| Right ascension | 11h 09m 53.39376s[2] |
| Declination | −32° 22′ 03.0986″[2] |
| Apparent magnitude (V) | 5.79[1] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | A1V[4] |
| B−Vcolor index | 0.027±0.005[1] |
| Astrometry | |
| Radial velocity (Rv) | +1.3±0.5[1] km/s |
| Proper motion (μ) | RA: +18.454[2]mas/yr Dec.: −29.966[2]mas/yr |
| Parallax (π) | 8.9232±0.0816 mas[2] |
| Distance | 366 ± 3 ly (112 ± 1 pc) |
| Absolute magnitude (MV) | +0.38[1] |
| Details | |
| Mass | 2.61±0.06[3] M☉ |
| Radius | 3.1[5] R☉ |
| Luminosity | 72.1+7.8 −7.0[3] L☉ |
| Surface gravity (log g) | 3.83[5] cgs |
| Temperature | 9,120+127 −215[3] K |
| Rotational velocity (v sin i) | 73[3] km/s |
| Age | 439[6] Myr |
| Other designations | |
| Beta Antliae[7],NSV 5111,BD−31°8816,HD 97023,HIP 54561,HR 4339,SAO 202149[8] | |
| Database references | |
| SIMBAD | data |
HR 4339 is a single[9]star in theequatorialconstellation ofHydra. It was designated asBeta Antliae byLacaille, andGould intended to keep it in that constellation. However, the delineating of constellation boundaries by theIAU in 1930 saw it transferred to Hydra.[7] It has a white hue and is just visible to the naked eye with anapparent visual magnitude of 5.79.[1] The distance to this star, as determined fromparallax measurements, is approximately 366 light years.[2] It is drifting further away with aradial velocity of +1.3 km/s.[1]
This object is anA-type main-sequence star with astellar classification of A1V.[4] It is a suspectedvariable star of unknown type and magnitude.[10] The star has 2.6 times themass of the Sun[3] and it is spinning with aprojected rotational velocity of 73 km/s.[3] It is radiating around 72 times theluminosity of the Sun from itsphotosphere at aneffective temperature of 9,120 K.[3]
