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HD 213623


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Orbital Solutions and Absolute Elements of the Eclipsing Binary EE Aquarii
EE Aqr is a 7.9 mag Algol variable with a 12 hr orbital period. TheWilson-Devinney program is used to simultaneously solve 11 previouslypublished light curves together with two existing radial velocitycurves. The resulting masses are M 1 = 2.24 ± 0.13 Msun and M 2 = 0.72 ± 0.04 M sun,and the radii are R 1 = 1.76 ± 0.03 R sunand R 2 = 1.10 ± 0.02 R sun. The system hasthe lower-mass component completely filling its Roche lobe. Its distancefrom Hipparcos observations is 112 ± 10 pc. An improved ephemerisis derived, and no deviations in the period over time were seen. Lightand velocity curve parameters, orbital elements, and absolute dimensionsare presented, plus a comparison is made with previous solutions.

New Observed Times of Minima for EE Aqr, RV Gru and RW PsA
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Photometric study of EE Aquarii.
Abstract image available at:http://adsabs.harvard.edu/abs/1974AJ.....79.1093W

Faint blue stars in the region near the South Galactic Pole.
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Osservazione e dati astrometrici

Costellazione:Acquario
Ascensione retta:22h33m07.80s
Declinazione:-19°23'27.7"
Magnitudine apparente:9.005
Moto proprio RA:20.8
Moto proprio Dec:1.2
B-T magnitude:9.091
V-T magnitude:9.013

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 213623
TYCHO-2 2000TYC 6388-989-1
USNO-A2.0USNO-A2 0675-37021689
HIPHIP 111321
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