Delta Antliae

δ Antliae
Location of δ Antliae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Antlia
Right ascension 10h 29m 35.37844s[1]
Declination –30° 36′ 25.4413″[1]
Apparent magnitude (V) +5.55[2] (5.58/9.65)[3]
Characteristics
Spectral type B9.5 V + F9 Ve[3]
U−B color index –0.18[2]
B−V color index –0.04[2]
Astrometry
Radial velocity (Rv)+14[4] km/s
Proper motion (μ) RA: –32.512 ± 0.387[5] mas/yr
Dec.: +0.918 ± 0.318[5] mas/yr
Parallax (π)7.1868 ± 0.2204 mas[5]
Distance450 ± 10 ly
(139 ± 4 pc)
Absolute magnitude (MV)–0.37[6]
Details
δ Ant A
Mass3.35 ± 0.15[6] M☉
Luminosity200[6] L☉
Temperature11,117[6] K
Rotational velocity (v sin i)27[7] km/s
Age214[6] Myr
Other designations
CD–29 8383, HD 90972, HIP 51376, HR 4118, NSV 4876, SAO 201442, PPM 287759
Database references
SIMBADdata

Delta Antliae (δ Ant, δ Antliae) is a binary star[6] system in the southern constellation of Antlia. The combined apparent visual magnitude of the system is +5.57,[2] allowing it to be viewed from the suburbs with the naked eye. Judging by the parallax shift of this system, it is located at a distance of 450 ± 10 light-years from Earth.[5] The system is reduced in magnitude by 0.03 due to extinction caused by intervening gas and dust.[3]

The primary component of the system has a stellar classification of B9.5 V, indicating that it is a B-type main sequence star. The companion is an F-type main sequence star with a classification of F9 Ve, where the 'e' indicates that there are emission lines in the spectrum. The two stars are separated by 11 arcseconds.[3]

Delta Antliae A, the brighter member of this system, has an estimated 3.4[6] times the mass of the Sun. It is radiating around 200[6] times as much luminosity as the Sun from its outer atmosphere at an effective temperature of 11,117 K.[6] At this heat, it shines with the characteristic blue-white hue of a B-type star.[8]

  1. ^ a b Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference mnrassa34_7 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference aaa359_227 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference rgcrv was invoked but never defined (see the help page).
  5. ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  6. ^ a b c d e f g h i Cite error: The named reference aaa372_152 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference aaa463_2_671 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference csiro was invoked but never defined (see the help page).