EW Aquarii

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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
Distance 410 ± 30 ly
(125 ± 8 pc)
Details
Mass 1.7 M
Radius 1.4 R
Luminosity 31[2] L
Temperature 7163[2] K
Other designations
BD-15° 5908, HD 201707, FK5 5868, SAO 164204, HIP 104634, HR 8102.
Database references
SIMBAD data
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[edit]

  1. ^ a b c Watson, Christopher (4 January 2010). "EW Aquarii". The International Variable Star Index. American Association of Variable Star Observers. Retrieved 4 June 2015. 
  2. ^ a b c 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:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x.