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GSC 03905-01870

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GSC 03905-01870
GSC 03905-01870 is located in 100x100
GSC 03905-01870
The red dot shows the location of GSC 03905-01870 in Draco.
Observation data
Epoch J2000      Equinox J2000
Constellation Draco[1]
Right ascension  18h 35m 58.79s[1]
Declination +53° 10′ 28.9″[1]
Apparent magnitude (V) 14.43 – 14.77[1]
Variable type W UMa
Proper motion (μ) RA: -8.437[2] mas/yr
Dec.: -12.638 [2] mas/yr
Parallax (π)0.4670 ± 0.0173[2] mas
Distance7,000 ± 300 ly
(2,140 ± 80 pc)
Period (P)0.428988 days
Radius1.67[2] R
Other designations
UCAC4 716-059522, USNO-A2.0 1425-09213580, USNO-B1.0 1431-0327922, 2MASS J18355880+5310289[3]
Database references
International Variable Star Index (VSX)[3]

VSX : Detail for GSC 03905-01870

GSC 03905-01870 is a binary star system located in the Draco constellation. It was discovered by Salvador Barquin, who classified the star as an eclipsing binary variable of W Ursae Majoris type in March 2018.[1][3] Its apparent magnitude varies from 14.43 to 14.77 over an orbital period of 10.3 hours.[1] Based upon an annual parallax shift of 0.4670 milliarc seconds as measured by the Gaia astrometric observatory,[2] this system is 7,000 light-years (2,140 parsecs) from Earth.


  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Barquin, S. (May 2018), "A New Binary Star System of EW Type in Draco: GSC 03905-01870", Open European Journal on Variable stars, 188: 1, arXiv:1805.05797, Bibcode:2018OEJV..188....1B
  2. 2.0 2.1 2.2 2.3 2.4 Brown, A. G. A. (2018), "Gaia Data Release 2", Astronomy and Astrophysics, Bibcode:2018A&
  3. 3.0 3.1 3.2 Watson, C. L.; Henden, A. A.; Price, A. (May 2006), "The International Variable Star Index (VSX)", Society for Astronomical Sciences: 47, Bibcode:2007AJ....133.2524W

Coordinates: Sky map 18h 35m 58.79s, +53° 10′ 28.9″

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