22 Aquilae

In this article, we will explore the fascinating world of 22 Aquilae. From its impact on society to its evolution over time, 22 Aquilae has captured the attention and curiosity of many people. Throughout this analysis, we will examine the different facets of 22 Aquilae, from its origin to its relevance today. We will learn how 22 Aquilae has influenced different aspects of daily life, as well as its role in popular culture. Through this tour, we will discover the importance of 22 Aquilae and its meaning in the modern world.

22 Aquilae
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 19h 16m 31.03180s[1]
Declination +04° 50′ 05.2523″[1]
Apparent magnitude (V) 5.59[2]
Characteristics
Spectral type A1 V[3] or A3 IV[4]
B−V color index 0.101±0.006[2]
Astrometry
Radial velocity (Rv)−22.8±4.3[5] km/s
Proper motion (μ) RA: +14.306[1] mas/yr
Dec.: –11.083[1] mas/yr
Parallax (π)4.7392±0.0910 mas[1]
Distance690 ± 10 ly
(211 ± 4 pc)
Absolute magnitude (MV)−0.48[2]
Details
Mass2.89±0.11[6] M☉
Luminosity161+27
−23[6] L☉
Temperature8453±78[6] K
Rotational velocity (v sin i)70[6] km/s
Other designations
22 Aql, AG+04 2489, BD+04°4045, GC 26567, HD 180482, HIP 94727, HR 7303, SAO 143134, 2MASS J19163102+0450052[7]
Database references
SIMBADdata

22 Aquilae, abbreviated 22 Aql, is a star in the equatorial constellation of Aquila. 22 Aquilae is its Flamsteed designation. It is a faint star but visible to the naked eye with an apparent visual magnitude of 5.59.[2] The distance to 22 Aql can be estimated from its annual parallax shift of 4.74 mas,[1] which yields a separation of 690 light years. It is moving closer to the Earth with a heliocentric radial velocity of −23 km/s.[5]

Cowley et al. (1969) assigned this star a stellar classification of A3 IV,[4] matching an evolving subgiant star that has exhausted the hydrogen at its core. Houk and Swift (1999) reassigned it as an A-type main-sequence star with a class of A1 V.[3] It has nearly three times the mass of the Sun and is spinning with a projected rotational velocity of 70 km/s.[6] The star is radiating 161[6] times the Sun's luminosity from its photosphere at an effective temperature of 8,453 K.[6]

References

  1. ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.
  2. ^ a b c d Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
  3. ^ a b Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, 5, Bibcode:1999MSS...C05....0H.
  4. ^ a b Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819.
  5. ^ a b Gontcharov, G. A. (2006), "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv:1606.08053, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065, S2CID 119231169.
  6. ^ a b c d e f g Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
  7. ^ "22 Aql". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved October 31, 2018.