41 Aquarii
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 22h 14m 18.03271s[1] |
| Declination | –21° 04′ 28.4330″[1] |
| Apparent magnitude (V) | 5.354[2] |
| Characteristics | |
| Spectral type | K0 III + F8 V[3] |
| U−B color index | +0.465[2] |
| B−V color index | +0.834[2] |
| Astrometry | |
| Radial velocity (Rv) | –23.7[4] km/s |
| Proper motion (μ) | RA: +24.30[1] mas/yr Dec.: +56.07[1] mas/yr |
| Parallax (π) | 13.97 ± 0.73[1] mas |
| Distance | 230 ± 10 ly (72 ± 4 pc) |
| Details | |
| Surface gravity (log g) | 2.85[5] cgs |
| Temperature | 4,750[5] K |
| Metallicity [Fe/H] | –0.13[5] dex |
| Other designations | |
41 Aquarii (abbreviated 41 Aqr) is a double star[3] in the equatorial constellation of Aquarius. 41 Aquarii is its Flamsteed designation. Its apparent magnitude is 5.354[2] and is located at a distance of around 230 light-years (71 parsecs) from Earth. The brighter component is a red clump[7] giant star with a stellar classification of K0 III and a magnitude of 5.73. At an angular separation of 5.148 arcseconds, the fainter companion is an F-type main sequence star with a magnitude 7.16 and a classification of F8 V.[3]
References
- 1 2 3 4 5 van Leeuwen, F. (November 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.
- 1 2 3 4 Rakos, K. D.; et al. (February 1982), "Photometric and astrometric observations of close visual binaries", Astronomy and Astrophysics Supplement Series 47: 221–235, Bibcode:1982A&AS...47..221R.
- 1 2 3 Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
- ↑ Wilson, Ralph Elmer (1953), General Catalogue of Stellar Radial Velocities, Washington: Carnegie Institution of Washington, Bibcode:1953QB901.W495......
- 1 2 3 McWilliam, Andrew (December 1990), "High-resolution spectroscopic survey of 671 GK giants", Astrophysical Journal Supplement Series 74: 1075–1128, Bibcode:1990ApJS...74.1075M, doi:10.1086/191527.
- ↑ "41 Aqr -- Star in double system", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-02-23.
- ↑ Alves, David R. (August 2000), "K-Band Calibration of the Red Clump Luminosity", The Astrophysical Journal 539 (2): 732–741, arXiv:astro-ph/0003329, Bibcode:2000ApJ...539..732A, doi:10.1086/309278.
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
This article is issued from Wikipedia - version of the Thursday, December 10, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.