51 Aquilae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 50m 46.78324s[1] |
| Declination | −10° 45′ 48.6319″[1] |
| Apparent magnitude (V) | 5.39[2] |
| Characteristics | |
| Spectral type | F5 V Fe-1 CH-0.7[3] |
| B−V color index | +0.38[2] |
| Astrometry | |
| Radial velocity (Rv) | +6[4] km/s |
| Proper motion (μ) | RA: -33.35[1] mas/yr Dec.: +32.88[1] mas/yr |
| Parallax (π) | 35.88 ± 0.35 mas[1] |
| Distance | 90.9 ± 0.9 ly (27.9 ± 0.3 pc) |
| Absolute magnitude (MV) | 3.16[5] |
| Details | |
| Surface gravity (log g) | 4.16[3] cgs |
| Temperature | 6,812[3] K |
| Metallicity [Fe/H] | –0.18[3] dex |
| Rotational velocity (v sin i) | 77.5[6] km/s |
| Age | 1.6[5] Gyr |
| Other designations | |
51 Aquilae (abbreviated 51 Aql) is a star in the equatorial constellation of Aquila. 51 Aquilae is its Flamsteed designation. It has an apparent visual magnitude of 5.39,[2] which means it is faintly visible to the naked eye. Based upon an annual parallax shift of 35.88 mas,[1] the distance to this star is around 90.9 light-years (27.9 parsecs).
This is an F-type main sequence star with a stellar classification of F5 V Fe-1 CH-0.7;[3] where the 'Fe-1' and 'CH-0.7' represent abundance deficiencies of iron and the molecule CN, respectively. It is about 1.6[5] billion years old and is spinning relatively quickly with a projected rotational velocity of 77.5 km/s.[6] The outer atmosphere has an effective temperature of 6,812 K,[3] giving it the yellow-white hue characteristic of an F-type star.[8]
References
- ^ a b c d e f 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.
- ^ a b c Corben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars", Monthly Notes of the Astronomical Society of Southern Africa, 27: 11, Bibcode:1968MNSSA..27...11C.
- ^ a b c d e f Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal, 132 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637.
- ^ Wilson, Ralph Elmer (1953), General Catalogue of Stellar Radial Velocities, Washington: Carnegie Institution of Washington, Bibcode:1953QB901.W495......
- ^ a b c Holmberg, J.; Nordström, B.; Andersen, J. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191.
- ^ a b Schröder, C.; Reiners, A.; Schmitt, J. H. M. M. (January 2009), "Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo", Astronomy and Astrophysics, 493 (3): 1099–1107, Bibcode:2009A&A...493.1099S, doi:10.1051/0004-6361:200810377.
- ^ "51 Aql -- Star in double system", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-27.
- ^ "The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, retrieved 2012-01-16
