GSC 03905-01870
  | |
| 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] |
| Characteristics | |
| Variable type | W UMa |
| Astrometry | |
| Proper motion (μ) | RA: -8.437[2] mas/yr Dec.: -12.638 [2] mas/yr |
| Parallax (π) | 0.4670 ± 0.0173[2] mas |
| Distance | 7,000 ± 300 ly (2,140 ± 80 pc) |
| Orbit[1] | |
| Period (P) | 0.428988 days |
| Details | |
| Radius | 1.67[2] R☉ |
| Other designations | |
| Database references | |
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.
References[edit]
- ↑ 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
- ↑ 2.0 2.1 2.2 2.3 2.4 Brown, A. G. A. (2018), "Gaia Data Release 2", Astronomy and Astrophysics, Bibcode:2018A&A..in.prep...
- ↑ 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: 
18h 35m 58.79s, +53° 10′ 28.9″
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