HD 81817
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Draco |
| Right ascension | 09h 37m 05.28778s[1] |
| Declination | +81° 19′ 34.9711″[1] |
| Spectral type | K3III + DA2.8[2] |
| Database references | |
| SIMBAD | data |
HD 81817 is a star in the constellation Draco. Its apparent magnitude is 4.27 and it is a spectroscopic binary system containing a red giant and a white dwarf.
References
- 1 2 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752
. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. - ↑ Holberg, J. B.; Oswalt, T. D.; Sion, E. M.; Barstow, M. A.; Burleigh, M. R. (2013). "Where are all the Sirius-like binary systems?". Monthly Notices of the Royal Astronomical Society. 435 (3): 2077. arXiv:1307.8047. Bibcode:2013MNRAS.435.2077H. doi:10.1093/mnras/stt1433.
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