8 Aquilae
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| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Aquila |
| Right ascension | 18h 51m 22.15786s[1] |
| Declination | –03° 19′ 04.2836″[1] |
| Apparent magnitude (V) | 6.08[2] |
| Characteristics | |
| Spectral type | F2 III[3] |
| U−B color index | +0.06[4] |
| B−V color index | +0.30[4] |
| Variable type | δ Sct type[5] |
| Astrometry | |
| Radial velocity (Rv) | +11.8[2] km/s |
| Proper motion (μ) | RA: +1.12[1] mas/yr Dec.: –21.35[1] mas/yr |
| Parallax (π) | 12.72 ± 0.37 mas |
| Distance | 256 ± 7 ly (79 ± 2 pc) |
| Absolute magnitude (MV) | 1.27[5] |
| Details | |
| Surface gravity (log g) | 3.51[5] cgs |
| Temperature | 7,051[5] K |
| Metallicity [Fe/H] | 0.14[5] dex |
| Rotational velocity (v sin i) | 105[6] km/s |
| Other designations | |
8 Aquilae (abbreviated 8 Aql) is a star in the equatorial constellation of Aquila. 8 Aquilae is the Flamsteed designation. It has an apparent visual magnitude of 6.08[2] 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[edit]
- ^ 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.
External links[edit]
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