19 Aquilae
 Image captured from Mount Laguna, California | |
| Observation data Epoch J2000.0 Equinox | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 08m 59.91138s[1] |
| Declination | +06° 04′ 23.5545″[1] |
| Apparent magnitude (V) | 5.227[2] |
| Characteristics | |
| Spectral type | F0 III-IV[3] |
| Apparent magnitude (U) | 5.59 ± 0.010[4] |
| Apparent magnitude (B) | 5.57 ± 0.007[4] |
| Apparent magnitude (V) | 5.23 ± 0.009[4] |
| U−B color index | +0.020[2] |
| B−V color index | +0.345[2] |
| Astrometry | |
| Radial velocity (Rv) | -46.7[5] km/s |
| Proper motion (μ) | RA: -10.40 ± 0.54[1] mas/yr Dec.: -77.22 ± 0.39[1] mas/yr |
| Parallax (π) | 21.84 ± 0.48[1] mas |
| Distance | 149 ± 3 ly (46 ± 1 pc) |
| Absolute magnitude (MV) | 1.94[6] |
| Details | |
| Surface gravity (log g) | 4.13[3] cgs |
| Temperature | 6,954[3] K |
| Metallicity [Fe/H] | +0.03[3] dex |
| Rotational velocity (v sin i) | 57.0[7] km/s |
| Age | 1.3[6] years |
| Other designations | |
19 Aquilae is the Flamsteed designation for a star in the equatorial constellation of Aquila. It has an apparent visual magnitude of 5.23[2] and is about 149 light-years (46 parsecs) distant from the Earth.[1]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 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.
- ↑ 2.0 2.1 2.2 2.3 Oja, T., "UBV photometry of stars whose positions are accurately known. III", Astronomy and Astrophysics Supplement Series 65 (2): 405–4.
- ↑ 3.0 3.1 3.2 3.3 Balachandran, Suchitra (May 1, 1990). "Lithium depletion and rotation in main-sequence stars". Astrophysical Journal, Part 1 354: 310–332. Bibcode:1990ApJ...354..310B. doi:10.1086/168691.
- ↑ 4.0 4.1 4.2 4.3 "19 Aql -- Variable Star", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-07-25.
- ↑ Wielen, R. et al. (1999), Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions (35), Astronomisches Rechen-Institut Heidelberg, Bibcode:1999VeARI..35....1W.
- ↑ 6.0 6.1 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.
- ↑ 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.
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