OU Geminorum
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| Observation data Epoch 2000 Equinox 2000 |
|
|---|---|
| Constellation | Gemini |
| Right ascension | 06h 26m 10.25040s[1] |
| Declination | +18° 45′ 24.8597″[1] |
| Apparent magnitude (V) | 6.768[2] |
| Characteristics | |
| Spectral type | K3Vk[2] |
| U−B color index | 0.662[2] |
| B−V color index | 0.972[2] |
| Variable type | BY Dra |
| Astrometry | |
| Radial velocity (Rv) | −8.6[3] km/s |
| Proper motion (μ) | RA: −117.60[1] mas/yr Dec.: −163.48[1] mas/yr |
| Parallax (π) | 67.89 ± 1.53[1] mas |
| Distance | 48 ± 1 ly (14.7 ± 0.3 pc) |
| Absolute magnitude (MV) | 5.93±0.05[2] |
| Details | |
| Surface gravity (log g) | 4.30[4] cgs |
| Temperature | 4,959[4] K |
| Metallicity [Fe/H] | −0.21[4] dex |
| Rotational velocity (v sin i) | 9.90[4] km/s |
| Other designations | |
OU Geminorum (OU Gem) is a visual binary or possible Triple star located in the constellation of Gemini.
The system has an absolute magnitude of 5.93, so at a distance of 48 light years it has an apparent magnitude of 6.77 when viewed from earth. It also has a total Proper Motion of 0.210"/yr and belongs to the Ursa Major stream.
The system is a much studied BY Draconis variable star with a period of 6.99 days[6][7] The primary star is a K3Vk class star.
The secondary star in the system has a surface temperature of 4486±50 K and orbits the primary in about seven days.[8][9]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 2.2 2.3 2.4 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 4.2 4.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ http://www.ucm.es/info/Astrof/users/dmg/papers/pwIII/node10.html
- ↑ http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?bibcode=1980PASP...92..218B&db_key=AST&page_ind=0&data_type=GIF&type=SCREEN_VIEW&classic=YES
- ↑ http://www.ari.uni-heidelberg.de/datenbanken/aricns/cnspages/4c00500.htm
- ↑ http://archive.is/20121209190058/http://cdsweb.cern.ch/record/411408/files/9912160.pdf
External links
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Mishenina T.V. et al. The New Absolute Parameters Of Ou Gem – The star Of By Dra Type Odessa Astronomical Publications, vol. 23 (2010)
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