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7 Aquilae

A blue band light curve for 7 Aquilae, adapted from Machado et al. (2007)
Observation data Epoch J2000      Equinox J2000
Constellation	Aquila
Right ascension	18 51 05.40849
Declination	−03° 15′ 40.0050″
Apparent magnitude (V)	6.894
Characteristics
Evolutionary stage	main sequence
Spectral type	F0V or F0IV
B−V color index	+0.285
Variable type	δ Sct
Astrometry
Radial velocity (Rv)	−20.65 km/s
Proper motion (μ)	RA: −46.266 mas/yr Dec.: −59.024 mas/yr
Parallax (π)	9.0793 ± 0.0286 mas
Distance	359 ± 1 ly (110.1 ± 0.3 pc)
Absolute magnitude (MV)	1.22
Details
Mass	2.05 M☉
Radius	2.73 R☉
Luminosity	24 L☉
Surface gravity (log g)	3.62 cgs
Temperature	7,257 K
Metallicity	0.01 dex
Rotational velocity (v sin i)	32 km/s
Age	1.17 Gyr
Other designations
7 Aql, V1728 Aql, BD–03°4390, HD 174532, HIP 92501, SAO 142696
Database references
SIMBAD	data

7 Aquilae is a star in the equatorial constellation of Aquila, located 359 light years away from the Sun. 7 Aquilae is the Flamsteed designation. It is visible to the naked eye as a faint, yellow-white hued star with a baseline apparent visual magnitude of 6.9. The star is moving closer to the Earth with a heliocentric radial velocity of −21 km/s.

Houk and Swift (1999) find a stellar classification of F0IV, matching an F-type subgiant star that has exhausted the hydrogen at its core and is evolving into a giant. Fox Machado et al. (2010) found a class of F0V, suggesting it is still a main sequence star. Ennio Poretti et al. discovered 7 Aquilae is a variable star while searching for targets to be observed by the CoRoT satellite, and published their discovery in 2003. It is a pulsating variable star of the Delta Scuti type. It has double the mass of the Sun and 2.7 times the Sun's radius. The detection of an infrared excess suggests a debris disk with a mean temperature of 140 K is orbiting about 16.30 AU away from the host star.

References

1. ^ 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. S2CID 15349358.
2. ^ Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
3. ^ 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. S2CID 119241648.
4. ^ Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars". Michigan Spectral Survey. 5. Bibcode:1999MSS...C05....0H.
5. ^ Cotten, Tara H.; Song, Inseok (July 2016). "A Comprehensive Census of Nearby Infrared Excess Stars". The Astrophysical Journal Supplement Series. 225 (1): 24. arXiv:1606.01134. Bibcode:2016ApJS..225...15C. doi:10.3847/0067-0049/225/1/15. S2CID 118438871. 15.
6. ^ "7 Aql". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-04-24.
7. Poretti, E.; Garrido, R.; Amado, P. J.; Uytterhoeven, K.; Handler, G.; Alonso, R.; Martín, S.; Aerts, C.; Catala, C.; Goupil, M. J.; Michel, E.; Mantegazza, L.; Mathias, P.; Pretorius, M. L.; Belmonte, J. A.; Claret, A.; Rodríguez, E.; Suarez, J. C.; Vuthela, F. F.; Weiss, W. W. (July 2003). "Preparing the COROT space mission: Incidence and characterisation of pulsation in the lower instability strip" (PDF). Astronomy and Astrophysics. 406: 203–211. doi:10.1051/0004-6361:20030711. Retrieved 22 November 2024.

v t e Constellation of Aquila
Aquila in Chinese astronomy List of stars in Aquila
Stars	Bayer α (Altair) β (Alshain) γ (Tarazed) δ ε ζ (Okab) η θ (Tseen Foo) ι κ λ μ ν ξ (Libertas) ο π σ τ υ φ χ ψ ω ω A b c d e f g h i k l Flamsteed 4 5 7 8 10 11 18 19 20 21 22 23 24 42 45 46 51 56 57 58 62 64 66 68 69 70 14 Sge 62 Ser 64 Sgr Variable R U V W TT FF QS V368 V450 V500 V603 V604 V605 V606 V923 V1286 V1291 V1298 V1302 V1315 V1333 V1339 V1427 V1428 V1429 V1472 V1487 V1494 V1654 V1672 V1691 V1703 (Phoenicia) V1828 V1936 HR 7099 7143 7288 7300 7307 7396 7456 7569 7598 7599 7693 7717 7803 HD 179079 183263 187734 192699 (Chechia) Other CoRoT-2 CoRoT-3 CoRoT-8 Gaia BH3 HAT-P-41 PSR J1856+0245 PSR J1903+0327 PSR B1913+16 (Hulse–Taylor) PSR J1951+1123 SGR 1900+14 SS 433 W43A W49-2 WASP-80 (Petra) WD J1953−1019 ZTF J1901+1458
Exoplanets CoRoT-2b CoRoT-3b CoRoT-8b CoRoT-10b HD 179079 b HD 183263 b c HD 192263 b HD 192699 b ξ Aquilae b
Star clusters NGC 6709 NGC 6738 NGC 6755 NGC 6756 NGC 6760
Nebulae	NGC 6741 6751 6778 6781 6790 Other Abell 48 Abell 70 E Nebula Hen 2-428 HESS J1857+026 Kesteven 75 Smith's Cloud W43 W49 W49B W50
Galaxies	NGC 6814 Other IC 1327
Category

• F-type main-sequence stars
• F-type subgiants
• Delta Scuti variables
• Circumstellar disks
• Aquila (constellation)
• Objects with variable star designations
• Durchmusterung objects
• Flamsteed objects
• Henry Draper Catalogue objects
• Hipparcos objects