Zeta2 Antliae

For other stars with this designation, see Zeta Antliae.
Zeta2 Antliae
Location of ζ2 Antliae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Antlia
Right ascension 09h 31m 32.15879s[1]
Declination −31° 52′ 18.5989″[1]
Apparent magnitude (V) 5.91[2]
Characteristics
Spectral type A9 IV[3]
U−B color index +0.16[2]
B−V color index +0.23[2]
Astrometry
Radial velocity (Rv)+19.8 ± 1.6[4] km/s
Proper motion (μ) RA: -47.968 ± 0.162[5] mas/yr
Dec.: -8.784 ± 0.179[5] mas/yr
Parallax (π)8.4565 ± 0.1075 mas[5]
Distance386 ± 5 ly
(118 ± 2 pc)
Absolute magnitude (MV)+0.44[6]
Details
Mass1.71[7] M☉
Radius4.22[7] R☉
Luminosity49.5[7] L☉
Surface gravity (log g)3.42[7] cgs
Temperature7,455[7] K
Other designations
CD-31 7369, HD 82513, HIP 46734, HR 3789, SAO 200459, PPM 286565[8]
Database references
SIMBADdata

Zeta2 Antliae is the Bayer designation for a star in the southern constellation of Antlia, the air pump. With an apparent visual magnitude of 5.91,[2] it is a relatively faint star that requires dark suburban skies for viewing with the naked eye. Parallax measurements show it to be located at a distance of roughly 386 light-years (118 parsecs) from Earth.[1]

The spectrum of this star matches a stellar classification of A9 IV,[3] where the luminosity class of IV indicate that this is a subgiant star that is evolving away from the main sequence as the supply of hydrogen at its core is becoming exhausted. This is catalogued as an Am star, which means it is a chemically peculiar star that shows strong indications of certain trace metals in its spectrum.[6] The chemical peculiarity is now considered doubtful.[9]

  1. ^ a b c 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 apj83 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference al32_11_759 was invoked but never defined (see the help page).
  5. ^ a b c 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 Cite error: The named reference aaa92_3_289 was invoked but never defined (see the help page).
  7. ^ a b c d e Cite error: The named reference tess was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference renson2009 was invoked but never defined (see the help page).