51 Aquilae
| Observation data EpochJ2000EquinoxJ2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h50m46.78324s[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−Vcolor 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 ± 0.35mas[1] |
| Distance | 90.9 ± 0.9ly (27.9 ± 0.3pc) |
| Absolute magnitude(MV) | 3.16[5] |
| Details | |
| Surface gravity(logg) | 4.16[3]cgs |
| Temperature | 6,812[3]K |
| Metallicity[Fe/H] | –0.18[3]dex |
| Rotational velocity(vsini) | 77.5[6]km/s |
| Age | 1.6[5]Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
51 Aquilae(abbreviated51 Aql) is astarin theequatorialconstellationofAquila.51 Aquilaeis itsFlamsteed designation.It has anapparent visual magnitudeof 5.39,[2]which means it isfaintly visible to the naked eye.Based upon an annualparallaxshift of 35.88mas,[1]the distance to this star is around 90.9light-years(27.9parsecs).
This is anF-type main sequence starwith astellar classificationofF5 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 aprojected rotational velocityof 77.5 km/s.[6]Theouter atmospherehas aneffective temperatureof 6,812 K,[3]giving it the yellow-white hue characteristic of anF-type star.[8]
References
[edit]- ^abcdefvan 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,S2CID18759600.
- ^abcCorben, 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.
- ^abcdefGray, 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,S2CID119476992.
- ^Wilson, Ralph Elmer (1953), "General Catalogue of Stellar Radial Velocities",Carnegie Institute Washington D.C. Publication,Washington:Carnegie Institution of Washington,Bibcode:1953GCRV..C......0W.
- ^abcHolmberg, 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,S2CID118577511.
- ^abSchröder, C.; Reiners, Ansgar; Schmitt, Jürgen H. M. M. (January 2009),"Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo"(PDF),Astronomy and Astrophysics,493(3): 1099–1107,Bibcode:2009A&A...493.1099S,doi:10.1051/0004-6361:200810377[permanent dead link]
- ^"* 51 Aql".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved2012-07-27.
- ^"The Colour of Stars",Australia Telescope, Outreach and Education,Commonwealth Scientific and Industrial Research Organisation,December 21, 2004, archived fromthe originalon February 22, 2012,retrieved2012-01-16
