HD 96146

HD 96146
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Antlia
Right ascension 11h 04m 54.1966s[1]
Declination −35° 48′ 16.817″[1]
Apparent magnitude (V) 5.41±0.01[2]
Characteristics
Spectral type A0 V[3]
B−V color index +0.03[4]
Astrometry
Radial velocity (Rv)−4.66±6.09[1] km/s
Proper motion (μ) RA: −24.217 mas/yr[1]
Dec.: +4.463 mas/yr[1]
Parallax (π)4.6163 ± 0.4323 mas[1]
Distance710 ± 70 ly
(220 ± 20 pc)
Absolute magnitude (MV)−0.55[5]
Details
Mass3.84[6] M☉
Radius6.17[7] R☉
Luminosity218+47
−37[8] L☉
Surface gravity (log g)3.46[9] cgs
Temperature9,750+113
−112[8] K
Metallicity [Fe/H]+0.07[9] dex
Rotational velocity (v sin i)10±1[10] km/s
Age291+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
SIMBADdata

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,[2] 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.[1]

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]

  1. ^ a b c d e f Cite error: The named reference DR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Houk1982 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Kervella2021 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Anders2019 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Royer2002 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Grosbol1978 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Gould1879 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Tokovinin2020 was invoked but never defined (see the help page).