29 Aquarii
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 22h 02m 26.24906s[1] |
| Declination | −16° 57′ 53.4077″[1] |
| Apparent magnitude (V) | 6.37 |
| Characteristics | |
| Spectral type | A2 V + K0 III[2] |
| B−V color index | 0.42 |
| Astrometry | |
| Radial velocity (Rv) | 15 km/s |
| Proper motion (μ) | RA: +6.26[1] mas/yr Dec.: –0.51[1] mas/yr |
| Parallax (π) | 3.70 ± 1.99[1] mas |
| Distance | approx. 900 ly (approx. 300 pc) |
| Other designations | |
29 Aquarii (abbreviated 29 Aqr) is a binary star system in the equatorial constellation of Aquarius. 29 Aquarii is the Flamsteed designation; the system also bears the variable star designation DX Aquarii The orbital plane of the two stars lies near the line of sight, so they form an Algol-type eclipsing binary. The first component of the system is an A-type main sequence star with a stellar classification of A2 V. Its companion is giant star with a classification of K0 III. Their orbital period is 0.94501 days.[2]
Stellar system
The variability of this star was first noticed in 1965 by W. Strohmeier of Remeis-Observatory in Bamberg, Germany.[4] He later discovered that the variability was caused by a binary companion eclipsing the primary star.[5]
References
- 1 2 3 4 5 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. - 1 2 Zasche, P.; et al. (August 2009), "A Catalog of Visual Double and Multiple Stars With Eclipsing Components", The Astronomical Journal, 138 (2): 664–679, arXiv:0907.5172, Bibcode:2009AJ....138..664Z, doi:10.1088/0004-6256/138/2/664.
- ↑ "BD-17 6422 -- Spectroscopic binary", SIMBAD Astronomical Object Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-16.
- ↑ Strohmeier, W.; et al. (1965). "Bright Southern BV-Stars". Information Bulletin On Variable Stars. 81. Bibcode:1965IBVS...81....1S.
- ↑ Strohmeier, W. (1966). "BV 449 and BV 600, Two Bright EB-Stars". Information Bulletin On Variable Stars. 164. Bibcode:1966IBVS..164....1S.
External links
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