7 Aquilae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 18h 51m 05.41169s[1] |
| Declination | –03° 15′ 40.01079″[1] |
| Apparent magnitude (V) | 6.894[2] |
| Characteristics | |
| Spectral type | F0V[2] |
| B−V color index | +0.285[3] |
| Variable type | δ Sct[3] |
| Astrometry | |
| Radial velocity (Rv) | –29[4] km/s |
| Proper motion (μ) | RA: –47.13[1] mas/yr Dec.: –59.85[1] mas/yr |
| Parallax (π) | 8.87 ± 0.45[1] mas |
| Distance | 136[2] pc |
| Absolute magnitude (MV) | 1.22[2] |
| Details | |
| Mass | 2.05[3][2] M☉ |
| Luminosity | 24[3] L☉ |
| Surface gravity (log g) | 3.62[2] cgs |
| Temperature | 7,257[2] K |
| Metallicity [Fe/H] | 0.01[2] dex |
| Rotational velocity (v sin i) | 32[3] km/s |
| Other designations | |
7 Aquilae (abbreviated 7 Aql) is a star in the equatorial constellation of Aquila. 7 Aquilae is the Flamsteed designation. Its apparent magnitude is 6.9 and it is at a distance of about 136 parsecs (440 light-years) from Earth. This is a pulsating variable star of the Delta Scuti type.
References
- 1 2 3 4 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.
- 1 2 3 4 5 6 7 8 Fox Machado, L.; Alvarez, M.; Michel, R.; Moya, A.; Peña, J. H.; Parrao, L.; Castro, A. (2010). "Strömgren photometry and spectroscopy of the δ Scuti stars 7 Aql and 8 Aql". New Astronomy 15 (5): 397. arXiv:0912.2808. Bibcode:2010NewA...15..397F. doi:10.1016/j.newast.2009.11.006.
- 1 2 3 4 5 Fox Machado, L.; et al. (August 2007), "Multisite Observations of δ Scuti Stars 7 Aql and 8 Aql (a New δ Scuti Variable): The Twelfth STEPHI Campaign in 2003", The Astronomical Journal 134 (2): 860–866, arXiv:0706.0576, Bibcode:2007AJ....134..860F, doi:10.1086/520062.
- ↑ Wilson, Ralph Elmer (1953), "General Catalogue of Stellar Radial Velocities", Washington (Washington: Carnegie Institution of Washington), Bibcode:1953QB901.W495......
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