Z Apodis
Z Apodis (Z Aps) is a variable star in the constellation of Apus. It has an apparent visual magnitude which varies between 10.7 and 12.7,[2] over a period of 39.37 days.[4] Although described in the General Catalogue of Variable Stars as a cataclysmic variable star, it appears that it is a pulsating variable star,[3] and has been classed as an RV Tauri variable star, type A.[4]
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Apus |
| Right ascension | 14h 06m 54.85s[1] |
| Declination | −71° 22′ 16.7″[1] |
| Apparent magnitude (V) | 10.7 to 12.7[2] |
| Characteristics | |
| U−B color index | +0.5 - +1.5[3] |
| B−V color index | +1.5 - +1.75[3] |
| Variable type | RV Tau[4] |
| Astrometry | |
| Proper motion (μ) | RA: −3.356[5] mas/yr Dec.: −1.759[5] mas/yr |
| Parallax (π) | 0.2789 ± 0.0294[5] mas |
| Distance | approx. 12,000 ly (approx. 3,600 pc) |
| Details | |
| Radius | 31.5[5] R☉ |
| Luminosity | 519[5] L☉ |
| Temperature | 4,909[5] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
References
- Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H. doi:10.1888/0333750888/2862.
- Z Aps, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 9, 2009.
- Marino, B. F.; Walker, W. S. G. (1991). "Z Apodis is a Pulsating - not a Cataclysmic - Variable Star". Information Bulletin on Variable Stars. 3664: 1. Bibcode:1991IBVS.3664....1M.
- Watson, Christopher (4 January 2010). "Z Apodis". The International Variable Star Index. American Association of Variable Star Observers. Retrieved 28 May 2015.
- 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.
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