64 Aquilae

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64 Aquilae
Observation data
Epoch J2000       Equinox J2000
Constellation Aquila
Right ascension 20h 08m 01.82224s [1]
Declination −00° 40′ 41.4663″ [1]
Apparent magnitude  (V)5.97 [2]
Characteristics
Spectral type K1 III/IV [3]
B−V color index +1.023±0.003 [2]
Astrometry
Radial velocity (Rv)−3.64±0.39 [4]  km/s
Proper motion (μ)RA: −115.520 [1]   mas/yr
Dec.: –67.593 [1]   mas/yr
Parallax (π)21.4233 ± 0.0627 [1]   mas
Distance 152.2 ± 0.4  ly
(46.7 ± 0.1  pc)
Absolute magnitude  (MV)2.61 [2]
Details [4]
Mass 1.17±0.06  M☉
Radius 4.49±0.13  R☉
Luminosity 11.17 [2]   L☉
Surface gravity (log g)3.31±0.07  cgs
Temperature 4,786±20  K
Metallicity [Fe/H]−0.03±0.03  dex
Rotational velocity (v sin i)1.51 [5]  km/s
Age 6.20±1.18  Gyr
Other designations
64 Aql, BD−01° 3899, GC  27930, HD  191067, HIP  99171, HR  7690, SAO  144095 [6]
Database references
SIMBAD data

64 Aquilae, abbreviated 64 Aql, is a star in the equatorial constellation of Aquila. 64 Aquilae is its Flamsteed designation. It is a faint star that requires good viewing conditions to see, having an apparent visual magnitude of 5.97. [2] The distance to 64 Aql, as determined from its annual parallax shift of 21.42  mas , [1] is 152.2  light years. At that distance, the visual magnitude of the star is diminished by an extinction of 0.029 due to interstellar dust. [5] It is moving closer to the Earth with a heliocentric radial velocity of −3.6 km/s. [4]

This is an evolved giant star currently on the red giant branch [5] with a stellar classification of K1 III/IV. [3] The luminosity class of 'III/IV' indicates the spectrum shows a blend of features matching a subgiant and giant star. It is around 6.2 billion years old with 1.17 times the mass of the Sun and has expanded to 4.5 times the Sun's radius. [4] The star is radiating 11 [2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,786 K. [4]

Related Research Articles

Tau Aquilae Star in the constellation Aquila

Tau Aquilae, Latinized from τ Aquilae, is the Bayer designation for a star in the equatorial constellation of Aquila. The apparent visual magnitude of 5.7 indicates it is a faint star that is visible to the naked eye from suburban skies; at least according to the Bortle Dark-Sky Scale. The annual orbital motion of the Earth causes a parallax shift of 5.94 mas, which means the distance to this star is approximately 549 light-years. The magnitude of the star is diminished by 0.28 from extinction caused by interstellar gas and dust. It is drifting closer to the Sun with a radial velocity of −29 km/s.

69 Aquilae, abbreviated 69 Aql, is a star in the equatorial constellation of Aquila. 69 Aquilae is its Flamsteed designation. It is visible to the naked eye with an apparent visual magnitude of 4.91. Based upon an annual parallax shift of 16.2 mas, it is located 201 light years away. The star is moving closer to the Earth with a heliocentric radial velocity of −22.5 km/s.

70 Aquilae, abbreviated 70 Aql, is a single orange-hued star in the equatorial constellation of Aquila. 70 Aquilae is its Flamsteed designation. It is visible to the naked eye with an apparent visual magnitude of 4.90. The distance to 70 Aquilae, as determined from its annual parallax shift of 3.5 mas, is around 940 light years. The star is moving closer to the Earth with a heliocentric radial velocity of −9 km/s.

4 Aquilae, abbreviated 4 Aql, is a single, white-hued star in the equatorial constellation of Aquila. 4 Aquilae is the Flamsteed designation. It has an apparent visual magnitude of 5.02, making it a faint star visible to the naked eye. The distance to 4 Aql can be estimated from its annual parallax shift of 6.7 mas, yielding an estimated range of around 480 light years. It is moving closer to the Earth with a heliocentric radial velocity of −13 km/s.

23 Aquilae Star in the constellation Aquila

23 Aquilae is a binary star system in the equatorial constellation of Aquila. 23 Aquilae is its Flamsteed designation. It is at a distance of about 400 light-years with an apparent visual magnitude of 5.10, which is bright enough to be faintly visible to the naked eye as an orange-hued star. The brightness of the star is diminished by 0.21 in magnitude because of extinction from interstellar dust and gas. The system is moving closer to the Earth with a heliocentric radial velocity of –23 km/s.

37 Aquilae, abbreviated 37 Aql, is a star in the equatorial constellation of Aquila. 37 Aquilae is its Flamsteed designation. It has an apparent visual magnitude of approximately 5.12, which is bright enough to be visible to the naked eye. The distance to 37 Aql can be estimated from its annual parallax shift of 7.4 mas, yielding a range of 444 light years. The star is moving closer to the Earth with a heliocentric radial velocity of −30 km/s, and is predicted to come to within 72 light-years in around 4.4 million years.

21 Aquilae is a solitary variable star in the equatorial constellation of Aquila. It has the variable star designation V1288 Aql; 21 Aquilae is its Flamsteed designation. This object is visible to the naked eye as a dim, blue-white hued star with a baseline apparent visual magnitude of 5.14. The star is located at a distance of around 740 light-years from Earth, give or take a 30 light-year margin of error. It is moving closer to the Earth with a heliocentric radial velocity of –5 km/s.

20 Aquilae, abbreviated 20 Aql, is an irregular variable star in the equatorial constellation of Aquila. 20 Aquilae is its Flamsteed designation. It ranges in magnitude from a peak of 5.33 down to 5.36, which is bright enough for the star to be visible to the naked eye. The estimated distance to this star is around 920 light years, based upon an annual parallax shift of 3.5 mas. The star is moving closer to the Earth with a heliocentric radial velocity of −23 km/s.

14 Aquilae is a probable spectroscopic binary star system in the equatorial constellation of Aquila. 14 Aquilae is the Flamsteed designation though it also bears the Bayer designation g Aquilae. It is visible to the naked eye as a dim, white-hued star with an apparent visual magnitude of 5.42, and it is located at a distance of approximately 500 light-years from Sun. The star is moving closer to the Earth with a heliocentric radial velocity of −39 km/s, and may come as close as 136 light-years in around 3.5 million years.

66 Aquilae, abbreviated 66 Aql, is a fifth-magnitude star in the constellation of Aquila. 66 Aquilae is its Flamsteed designation. It is visible to the naked eye, having an apparent visual magnitude of 5.44. The star shows an annual parallax shift of 4.4 mas, which provides a distance estimate of around 730 light years. It is moving closer to the Earth with a heliocentric radial velocity of −30 km/s. The motion of the star over time suggests some displacement, which may indicate it is a close binary system.

42 Aquilae, abbreviated 42 Aql, is a single star in the equatorial constellation of Aquila. 42 Aquilae is its Flamsteed designation. It is a dim star but visible to the naked eye under suitable viewing conditions, having an apparent visual magnitude of 5.45. 42 Aql is located some 104.6 light years away, as determined from its annual parallax shift of 31.2 mas. it is moving closer to the Earth with a heliocentric radial velocity of −38 km/s, and is predicted to come to within 52 light-years of the Sun in around 752,000 years.

28 Aquilae, abbreviated 28 Aql, is a star in the equatorial constellation of Aquila. 28 Aquilae is its Flamsteed designation though it also bears the Bayer designation A Aquilae. It has an apparent visual magnitude is 5.5, making this a faint star that requires dark suburban skies to view. The annual parallax shift of 9.67 mas means this star is located at a distance of approximately 340 light-years from Earth.

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. The distance to 22 Aql can be estimated from its annual parallax shift of 4.74 mas, which yields a separation of 690 light years. It is moving closer to the Earth with a heliocentric radial velocity of −23 km/s.

58 Aquilae is a single star located around 520 light years from the Sun in the equatorial constellation of Aquila, near Eta Aquilae. 58 Aquilae is its Flamsteed designation. It is visible to the naked eye as a dim, blue-white hued star with an apparent visual magnitude of 5.60. This object is moving closer to the Earth with a heliocentric radial velocity of −53 km/s, and may come as close as 161 light-years in around 1.8 million years.

62 Aquilae is a single star located about 427 light years away from the Sun in the equatorial constellation of Aquila. 62 Aquilae is its Flamsteed designation. It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.67.

8 Aquilae is a star in the equatorial constellation of Aquila, located 266 light years away from the Sun. 8 Aquilae is the Flamsteed designation. It can be viewed with the naked eye in good seeing conditions, appearing as a dim, yellow-white hued star with an apparent visual magnitude of 6.08. The star is moving further from the Earth with a heliocentric radial velocity of +12 km/s.

Omega<sup>1</sup> Aquilae Star in the constellation Aquila

Omega1 Aquilae, which is Latinized from ω1 Aquilae, is the Bayer designation for a single star in the equatorial constellation of Aquila. With an apparent visual magnitude of 5.2 it is a faint, yellow-white hued star that can be seen with the naked eye in dark skies. From the annual parallax shift of 8.53 mas, the distance to this star can be estimated as 382 light-years, give or take a 6 light year margin of error. It is drifting closer to the Sun with a radial velocity of −14 km/s.

Omega<sup>2</sup> Aquilae Star in the constellation Aquila

Omega2 Aquilae, Latinized from ω2 Aquilae, is the Bayer designation for a star in the equatorial constellation of Aquila, the eagle. It has an apparent visual magnitude of 6.0, which is close to the lower limit of detectability with the naked eye. According to the Bortle Dark-Sky Scale, this star can be viewed from dark rural skies. As the Earth orbits about the Sun, this star undergoes a parallax shift of 11.7 mas. This is equivalent to a physical distance of 279 light-years from Earth, give or take a 2 light year margin of error. The star is drifting closer to the Sun with a radial velocity of −26 km/s.

46 Aquilae is a star in the constellation of Aquila, located to the north of Tarazed. 46 Aquilae is its Flamsteed designation. It is a dim, blue-white hued star that is a challenge to view with the naked eye, having an apparent visual magnitude of 6.33. This object is located approximately 830 light years from the Sun, based on parallax. It is moving closer to the Earth with a heliocentric radial velocity of −25 km/s.

63 Ceti is a star in the constellation of Cetus, located just over a degree south of the celestial equator. With an apparent magnitude of about 5.9, the star is barely visible to the naked eye as a dim, orange-hued point of light. Parallax estimates put it at a distance of about 390 light years away from the Earth, and it is drifting further away with a radial velocity of 28 km/s.

References

  1. 1 2 3 4 5 6 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. 1 2 3 4 5 6 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.
  3. 1 2 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. 1 2 3 4 5 Maldonado, J.; et al. (June 2013), "The metallicity signature of evolved stars with planets", Astronomy & Astrophysics, 554: 18, arXiv: 1303.3418 , Bibcode:2013A&A...554A..84M, doi:10.1051/0004-6361/201321082, A84.
  5. 1 2 3 Jones, M. I.; et al. (December 2011), "Study of the impact of the post-MS evolution of the host star on the orbits of close-in planets. I. Sample definition and physical properties", Astronomy & Astrophysics, 536: 7, arXiv: 1110.6459 , Bibcode:2011A&A...536A..71J, doi:10.1051/0004-6361/201117887, A71.
  6. ↑ "64 Aql". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved November 1, 2018.
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