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Best Viewed With GFS!8 Aquilae
From Wikipedia, the free encyclopedia
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Aquila |
| Right ascension | 18h 51m 22.15786s1 |
| Declination | –03° 19′ 04.2836″1 |
| Apparent magnitude (V) | 6.082 |
| Characteristics | |
| Spectral type | F2 III3 |
| U−B color index | +0.064 |
| B−V color index | +0.304 |
| Variable type | δ Sct type5 |
| Astrometry | |
| Radial velocity (Rv) | +11.82 km/s |
| Proper motion (μ) | RA: +1.121 mas/yr Dec.: –21.351 mas/yr |
| Parallax (π) | 12.72 ± 0.37 mas |
| Distance | 256 ± 7 ly (79 ± 2 pc) |
| Absolute magnitude (MV) | 1.275 |
| Details | |
| Surface gravity (log g) | 3.515 |
| Temperature | 7,0515 K |
| Metallicity [Fe/H] | 0.145 dex |
| Rotational velocity (v sin i) | 1056 km/s |
| Other designations | |
8 Aquilae is the Flamsteed designation for a star in the equatorial constellation of Aquila. It has an apparent visual magnitude of 6.082 and is about 256 light-years (78 parsecs) distant from the Earth.1 This is a delta scuti variable with at least three overlapping pulsation frequencies.5 It is an F-type giant star with a stellar classification of F2 III.3
References
- ^ a b c d e 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 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.
- ^ a b c "8 Aql -- Variable Star of delta Sct type", SIMBAD Astronomical Object Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-07-25.
- ^ a b Cousins, A. W. J. (1965), "Photometric Data for Stars in the Equatorial Zone (Eighth List)", Monthly Notes of the Astronomical Society of Southern Africa 24: 120, Bibcode:1965MNSSA..24..120C.
- ^ a b c d e f Fox Machado, L. et al. (July 2010), "Strömgren photometry and spectroscopy of the δ Scuti stars 7 Aql and 8 Aql", New Astronomy 15 (5): 397–402, arXiv:0912.2808, Bibcode:2010NewA...15..397F, doi:10.1016/j.newast.2009.11.006.
- ^ Royer, F. et al. (2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i in the northern hemisphere", Astronomy and Astrophysics 393 (3): 897–911, arXiv:astro-ph/0205255, Bibcode:2002A&A...393..897R, doi:10.1051/0004-6361:20020943.
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