HD 96146
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| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Antlia[1] |
| Right ascension | 11h 04m 54.1966s[2] |
| Declination | −35° 48′ 16.817″[2] |
| Apparent magnitude (V) | 5.41±0.01[3] |
| Characteristics | |
| Spectral type | A0 V[4] |
| B−V color index | +0.03[5] |
| Astrometry | |
| Radial velocity (Rv) | −4.66±6.09[2] km/s |
| Proper motion (μ) | RA: −24.217 mas/yr[2] Dec.: +4.463 mas/yr[2] |
| Parallax (π) | 4.6163±0.4323 mas[2] |
| Distance | 710 ± 70 ly (220 ± 20 pc) |
| Absolute magnitude (MV) | −0.55[1] |
| Details | |
| Mass | 3.84[6] M☉ |
| Radius | 6.17[7] R☉ |
| Luminosity | 218+47 −37[8] L☉ |
| Surface gravity (log g) | 3.46[9] cgs |
| Temperature | 9,750+113 −112[8] K |
| Metallicity [Fe/H] | +0.07[9] dex |
| Rotational velocity (v sin i) | 10±1[10] km/s |
| Age | 291+22 −21[11] Myr |
| Other designations | |
| 85 G. Antliae[12], CD−35°6954, CPD−35°4592, FK5 2885, GC 15238, HD 96146, HIP 54173, HR 4313, SAO 202067, WDS J11049-3548AB[13] | |
| Database references | |
| SIMBAD | data |
HD 96146 (HR 4313) is a binary star[14] located in the southern constellation Antlia. The system has a combined apparent magnitude of 5.41,[3] making it visible to the naked eye under ideal conditions. Parallax measurements from the Gaia spacecraft place the pair at a distance of 710 light years with a large margin of error. It is currently receding with a poorly constrained heliocentric radial velocity of 4.7 km/s.[2]
The object's status as a double star was not known until a 1991 Hipparcos survey of double stars. Since the pair's current projected separation is around 0.04 arcseconds, it makes it difficult to distinguish both components. Nevertheless, they are located along a position angle of 226°. The secondary has been observed using speckle interferometry to be 1.8 magnitudes fainter than the visible star.[15]
The primary has a stellar classification of A0 V, indicating that it is an ordinary A-type main-sequence star. Zorec and Royer (2012) model it as a dwarf star that is 99.5% through its main sequence lifetime, close to the subgiant phase. It has 3.84 times the mass of the Sun[6] and an enlarged radius of 6.17 R☉.[7] HD 96146 shines with a luminosity 220 times that of the Sun[8] from its photosphere at an effective temperature of 9,750 K, giving a white hue. HD 96146 is currently 291 million years old[11] and unlike most hot stars, spins modestly with a projected rotational velocity of only 10 km/s.[10]
