Zeta1 Antliae
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Antlia |
| ζ1 Ant A | |
| Right ascension | 09h 30m 46.100s[1] |
| Declination | −31° 53′ 21.12″[1] |
| Apparent magnitude (V) | 6.20[2] |
| ζ1 Ant B | |
| Right ascension | 09h 30m 45.759s[3] |
| Declination | −31° 53′ 28.01″[3] |
| Apparent magnitude (V) | 7.01[2] |
| Characteristics | |
| Spectral type | A0 V + A2 V[2] |
| U−B color index | +0.05[4] |
| B−V color index | +0.05[4] |
| Astrometry | |
| ζ1 Ant A | |
| Radial velocity (Rv) | −2.9±0.9[5] km/s |
| Proper motion (μ) | RA: +18.767 mas/yr[1] Dec.: −22.778 mas/yr[1] |
| Parallax (π) | 9.5729±0.0419 mas[1] |
| Distance | 341 ± 1 ly (104.5 ± 0.5 pc) |
| ζ1 Ant B | |
| Proper motion (μ) | RA: +20.517 mas/yr[3] Dec.: −21.314 mas/yr[3] |
| Parallax (π) | 9.6052 ± 0.0282 mas[3] |
| Distance | 339.6 ± 1.0 ly (104.1 ± 0.3 pc) |
| Details | |
| ζ1 Ant A | |
| Mass | 2.46[6] M☉ |
| Radius | 2.26[6] R☉ |
| Luminosity | 39.8[6] L☉ |
| Surface gravity (log g) | 4.1[6] cgs |
| Temperature | 9,641[6] K |
| Rotational velocity (v sin i) | 204[7] km/s |
| ζ1 Ant B | |
| Mass | 2.23[6] M☉ |
| Radius | 1.74[6] R☉ |
| Luminosity | 16.9[6] L☉ |
| Surface gravity (log g) | 4.3[6] cgs |
| Temperature | 8,872[6] K |
| Rotational velocity (v sin i) | 50[7] km/s |
| Other designations | |
| CD−31°7355, HIP 46657, PPM 286548, CCDM 09308-3153[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 | |
| SIMBAD | ζ1 Ant A |
| ζ1 Ant B | |
Zeta1 Antliae is a binary star[2] system in the southern constellation of Antlia. Its Bayer designation is Latinized from ζ1 Antliae, and abbreviated Zet1 Ant or ζ1 Ant, respectively. Based upon parallax measurements, the pair are located at a distance of roughly 340 light-years (100 parsecs) from Earth. They have apparent magnitudes of +6.20 and +7.01 and have an angular separation of 8.042 arcseconds.[2] The combined apparent magnitude of the system is +5.76,[4] 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;[2] which means they are hotter, larger, and more luminous than the Sun. The primary is spinning rapidly and the secondary more slowly.[7] The primary has 2.46 times the mass of the Sun and 2.26 times the Sun's radius. It is radiating 39.8 times the Sun's net luminosity from its photosphere at an effective temperature of 9,641 K. The secondary 2.23 times the mass and 1.74 times the first of the Run. It shines with 16.9 times the luminosity of the Sun at 8,872 K.[6]
References
[edit]- ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b c d e f 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.
- ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b c 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.
- ^ Gontcharov, G. A. (2006), "Pulkovo compilation of radial velocities for 35495 stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv:1606.08053, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065, S2CID 119231169.
- ^ a b c d e f g h i j k 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.
- ^ a b c 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". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-06-27.
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