9 Aquarii
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 21h 01m 08.33321s[1] |
| Declination | −13° 31′ 47.9702″[1] |
| Apparent magnitude (V) | 6.55[2] |
| Characteristics | |
| Spectral type | G6/8III[3] |
| Astrometry | |
| Radial velocity (Rv) | 22.8 ± 2[4] km/s |
| Proper motion (μ) | RA: -0.22[1] mas/yr Dec.: 5.41[1] mas/yr |
| Parallax (π) | 4.69 ± 0.60 mas[1] |
| Distance | approx. 700 ly (approx. 210 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
9 Aquarii (abbreviated 9 Aqr) is a yellow giant with a spectral type of G8III[3] and an apparent magnitude of 6.55[2] in the constellation Aquarius. 9 Aquarii is the Flamsteed designation.
References
- ^ a b c d e van Leeuwen, F.; et al. (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.
- ^ a b Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
- ^ a b Houk, N.; Smith-Moore, M. (1988). "Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume 4, Declinations -26°.0 to -12°.0". Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. 4. Bibcode:1988mcts.book.....H.
- ^ Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Bibcode:1953GCRV..C......0W.
{{cite journal}}: Cite journal requires|journal=(help) - ^ "* 9 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 28 January 2018.
