EW Aquarii

EW Aquarii
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 21h 11m 41.33828s
Declination 14° 28 20.5579
Apparent magnitude (V) 6.41 - 6.48[1]
Characteristics
Spectral type A8III[1]
U−B color index 0.14
B−V color index 0.28
Variable type Delta Scuti
Astrometry
Radial velocity (Rv)-39.2 ± 2 km/s
Proper motion (μ) RA: 39.26 ± 0.61 mas/yr
Dec.: 0.23 ± 0.23 mas/yr
Parallax (π)7.97 ± 0.51 mas
Distance410 ± 30 ly
(125 ± 8 pc)
Details
Mass1.7 M
Radius1.4 R
Luminosity31[2] L
Temperature7163[2] K
Other designations
BD-15° 5908, HD 201707, FK5 5868, SAO 164204, HIP 104634, HR 8102.
Database references
SIMBADdata
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

EW Aquarii is a star in the constellation Aquarius. A low amplitude Delta Scuti variable, it varies between magnitudes 6.41 and 6.48 over 2.16 hours.[1] Located around 410 light-years distant, it shines with a luminosity approximately 31 times that of the Sun and has a surface temperature of 7163 K.[2]

References

  1. 1 2 3 Watson, Christopher (4 January 2010). "EW Aquarii". The International Variable Star Index. American Association of Variable Star Observers. Retrieved 4 June 2015.
  2. 1 2 3 McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental Parameters and Infrared Excesses of Hipparcos Stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–57. arXiv:1208.2037Freely accessible. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x.
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