HD 220766
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 23h 26m 35.47400s[1] |
| Declination | −21° 44′ 27.0169″[1] |
| Apparent magnitude (V) | 6.44[2] |
| Characteristics | |
| Spectral type | K0III[3] |
| B−V color index | +1.04[2] |
| Astrometry | |
| Radial velocity (Rv) | +11.1[4] km/s |
| Proper motion (μ) | RA: +56.91[1] mas/yr Dec.: −2.36[1] mas/yr |
| Parallax (π) | 8.55 ± 0.66[1] mas |
| Distance | 380 ± 30 ly (117 ± 9 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 220766 is a double star in the equatorial constellation of Aquarius. The primary is a K-type giant star with a stellar classification of K0III[3] and an apparent magnitude of 6.44.[2] It has a faint, magnitude 12 companion, located at an angular separation of 5.0″ along a position angle of 132° (as of 1933).[5]
References[edit]
- ↑ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Unknown parameter
|s2cid=ignored (help) - ↑ 2.0 2.1 2.2 Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H. doi:10.1888/0333750888/2862.
- ↑ 3.0 3.1 Houk, Nancy; Smith-Moore, M. (1978). Michigan catalogue of two-dimensional spectral types for the HD stars. 4. Ann Arbor: Dept. of Astronomy, University of Michigan. Bibcode:1988mcts.book.....H. Search this book on
- ↑ Wilson, R. E. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication. Carnegie Institute of Washington, D.C. Bibcode:1953GCRV..C......0W.
- ↑ Mason, B. D.; et al. (2014). "The Washington Visual Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. Retrieved 2015-07-22.
External links[edit]
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