Eta Antliae

η Antliae
Location of η Antliae (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Antlia
Right ascension 09h 58m 52.27552s[1]
Declination −35° 53′ 27.4977″[1]
Apparent magnitude (V) 5.222[2]
Characteristics
Spectral type F1 V[3]
U−B color index +0.068[2]
B−V color index +0.333[2]
Astrometry
Radial velocity (Rv)+30[4] km/s
Proper motion (μ) RA: −89.782[1] mas/yr
Dec.: −16.245[1] mas/yr
Parallax (π)30.0606 ± 0.1080 mas[1]
Distance108.5 ± 0.4 ly
(33.3 ± 0.1 pc)
Absolute magnitude (MV)+2.62[5]
Details
η Ant A
Mass1.55[6] M☉
Radius1.72[1] R☉
Luminosity6.6[6] L☉
Surface gravity (log g)3.94[3] cgs
Temperature7,132[3] K
Metallicity [Fe/H]−0.20[3] dex
Age0.9[6] Gyr
Other designations
CD−35 6050, FK5 377, HD 86629, HIP 48926, HR 3947, SAO 200926, PPM 287133[7]
Database references
SIMBADdata
Database references
SIMBADdata

Eta Antliae (η Ant, η Antliae) is the Bayer designation for a double star in the southern constellation of Antlia. The brighter component has an apparent visual magnitude of 5.222,[2] making it visible to the naked eye. Parallax measurements of the system yield a distance estimate of 108.5 light-years (33.3 parsecs) from Earth.[1]

The main component has a stellar classification of F1 V,[3] which indicates that it is an F-type main sequence star. This star has 55% more mass than the Sun.[6] It shines with 6.6[6] times the Sun's luminosity at an effective temperature of 7,132 K.[3] This heat gives it the yellow-white glow of an F-type star.[8] It has a faint companion located 31 arcseconds away with an apparent magnitude of +11.3. Most likely this pair form a binary star system.[9]

  1. ^ a b c d e f g Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference sps1966 was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference aj132_1_161 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference gcsrv1953 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 c d e Cite error: The named reference aaa409_251 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD 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).
  9. ^ Cite error: The named reference mnras389_2_869 was invoked but never defined (see the help page).