Location of ζ Antliae (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Antlia |
| Right ascension | 09 30 46.09678 |
| Declination | −31° 53′ 21.1911″ |
| Apparent magnitude (V) | 5.76 (6.20/7.01) |
| Characteristics | |
| Spectral type | A0 V + A2 V |
| U−B color index | +0.05 |
| B−V color index | +0.05 |
| Astrometry | |
| ζ Ant A | |
| Proper motion (μ) | RA: +19.044 mas/yr Dec.: −22.448 mas/yr |
| Parallax (π) | 9.3166 ± 0.0605 mas |
| Distance | 350 ± 2 ly (107.3 ± 0.7 pc) |
| ζ Ant B | |
| Proper motion (μ) | RA: +20.756 mas/yr Dec.: −21.530 mas/yr |
| Parallax (π) | 9.3970 ± 0.0529 mas |
| Distance | 347 ± 2 ly (106.4 ± 0.6 pc) |
| Details | |
| ζ Ant A | |
| Mass | 2.46 M☉ |
| Radius | 2.26 R☉ |
| Luminosity | 39.8 L☉ |
| Surface gravity (log g) | 4.1 cgs |
| Temperature | 9,641 K |
| Rotational velocity (v sin i) | 204 km/s |
| ζ Ant B | |
| Mass | 2.23 M☉ |
| Radius | 1.74 R☉ |
| Luminosity | 16.9 L☉ |
| Surface gravity (log g) | 4.3 cgs |
| Temperature | 8,872 K |
| Rotational velocity (v sin i) | 50 km/s |
| Other designations | |
| HIP 46657, CD−31°7355, CCDM 09308-3153, PPM 286548 | |
| ζ Ant A: GC 13137, HD 82384, HR 3781, SAO 200445 | |
| ζ Ant B: GC 13135, HD 82383, HR 3780, SAO 200444 | |
| Database references | |
| SIMBAD | ζ Ant A |
| ζ Ant B | |
Zeta Antliae is the Bayer designation for a binary star 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. They have apparent magnitudes of +6.20 and +7.01 and are separated by 8.042 arcseconds. The apparent magnitude of the combined system is +5.76, 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, hotter, larger, and more luminous than the Sun. The primary is spinning rapidly and the secondary relatively slowly. 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☉.
References
- ^ van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
- ^ Hurly, P. R. (1975), "Combined-light UBV Photometry of 103 Bright Southern Visual Doubles", Monthly Notes of the Astronomical Society of Southern Africa, 34: 7, Bibcode:1975MNSSA..34....7H.
- ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ 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.
- ^ 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.
- ^ Stassun K.G.; et al. (October 2019), "The revised TESS Input Catalog and Candidate Target List", The Astronomical Journal, 158 (4): 138, arXiv:1905.10694, Bibcode:2019AJ....158..138S, doi:10.3847/1538-3881/ab3467, S2CID 166227927.
- ^ Royer, F.; et al. (January 2012), "Rotational velocities of A-type stars. I. Measurement of v sin i in the southern hemisphere", Astronomy and Astrophysics, 381: 105–121, arXiv:astro-ph/0110490, Bibcode:2002A&A...381..105R, doi:10.1051/0004-6361:20011422, S2CID 13133418.
- "IDS 09265-3127 AB -- Double or multiple star", SIMBAD Astronomical Object Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-06-27.
| Constellation of Antlia | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stars |
| ||||||||||
| |||||||||||
| Galaxies |
| ||||||||||
| |||||||||||
 Category | |||||||||||