Zeta1 Antliae

For other stars with this designation, see Zeta Antliae.
Zeta1 Antliae
Location of ζ1 Antliae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Antlia
Right ascension 09h 30m 46.09678s[1]
Declination −31° 53′ 21.1911″[1]
Apparent magnitude (V) 5.76[2] (6.20/7.01)[3]
Characteristics
Spectral type A0 V + A2 V[3]
U−B color index +0.05[2]
B−V color index +0.05[2]
Astrometry
ζ1 Ant A
Proper motion (μ) RA: +19.044[4] mas/yr
Dec.: −22.448[4] mas/yr
Parallax (π)9.3166 ± 0.0605 mas[4]
Distance350 ± 2 ly
(107.3 ± 0.7 pc)
ζ1 Ant B
Proper motion (μ) RA: +20.756[5] mas/yr
Dec.: −21.530[5] mas/yr
Parallax (π)9.3970 ± 0.0529 mas[5]
Distance347 ± 2 ly
(106.4 ± 0.6 pc)
Details
ζ1 Ant A
Mass2.46[6] M☉
Radius2.26[6] R☉
Luminosity39.8[6] L☉
Surface gravity (log g)4.1[6] cgs
Temperature9,641[6] K
Rotational velocity (v sin i)204[7] km/s
ζ1 Ant B
Mass2.23[6] M☉
Radius1.74[6] R☉
Luminosity16.9[6] L☉
Surface gravity (log g)4.3[6] cgs
Temperature8,872[6] K
Rotational velocity (v sin i)50[7] km/s
Other designations
HIP 46657, CD−31°7355, CCDM 09308-3153, PPM 286548[8]
ζ1 Ant A: GC 13137, HD 82384, HR 3781, SAO 200445
ζ1 Ant B: GC 13135, HD 82383, HR 3780, SAO 200444
Database references
SIMBADζ1 Ant A
ζ1 Ant B

Zeta1 Antliae is the Bayer designation for a binary star[3] system in the southern constellation of Antlia. Based upon parallax measurements, the pair are located at a distance of roughly 350 light-years (110 parsecs) from Earth.[1] They have apparent magnitudes of +6.20 and +7.01 and are separated by 8.042 arcseconds.[3] The apparent magnitude of the combined system is +5.76,[2] which is bright enough to be seen with the naked eye in suitably dark skies.

The two system components A and B are both A-type main sequence stars,[3] hotter, larger, and more luminous than the Sun. The primary is spinning rapidly and the secondary relatively slowly.[7] The primary has a mass of 2.46 M☉, an effective temperature of 9,641 K, a radius of 2.26 R☉, and a bolometric luminosity of 39.8 L☉. The secondary has a mass of 2.23 M☉, an effective temperature of 8,872 K, a radius of 1.74 R☉, and a bolometric luminosity of 16.9 L☉.[6]

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  3. ^ a b c d e Cite error: The named reference mnras389_2_869 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference dr2a was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference dr2b was invoked but never defined (see the help page).
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  7. ^ a b c Cite error: The named reference aaa381_105 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).