Epoch J2000 Equinox J2000
|Right ascension||22h 02m 26.24906s|
|Declination||−16° 57′ 53.4077″|
|Apparent magnitude (V)||6.37|
|Spectral type||A2 V + K0 III|
|B−V color index||0.42|
|Radial velocity (Rv)||15 km/s|
|Proper motion (μ)||RA: +6.26 mas/yr
Dec.: –0.51 mas/yr
|Parallax (π)||3.70 ± 1.99 mas|
|Distance||approx. 900 ly
(approx. 300 pc)
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.
The variability of this star was first noticed in 1965 by W. Strohmeier of Remeis-Observatory in Bamberg, Germany. He later discovered that the variability was caused by a binary companion eclipsing the primary star.
- van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv: , Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
- 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: , 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.
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