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Star in the constellation Aquila
Psi Aquilae ,
Latinized as ψ Aquilae, is the
Bayer designation for a
star in the
equatorial
constellation of
Aquila . It is a faint star with an
apparent visual magnitude of 6.25,
[2] which, according to the
Bortle Dark-Sky Scale , can be seen with the naked eye in dark rural skies. The orbit of the Earth causes an annual
parallax shift of 2.83
mas ,
[1] which indicates a distance of approximately 1,150
light-years (350
parsecs ).
The
spectrum of Psi Aquilae matches a
stellar classification of B9 III-IV,
[3] with the
luminosity class of III-IV indicating the spectrum lies part way between that of a
subgiant and a
giant star . The
effective temperature of the star's
outer atmosphere is 10,814 K,
[8] giving it the blue-white hue of a
B-type star .
[11] It has nearly four
[7] times the radius of the Sun and has a
projected rotational velocity of 20 km/s.
[9]
References
^
a
b
c
d
e
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 .
Gaia DR2 record for this source at
VizieR .
^
a
b
c
"psi Aql -- Star" , SIMBAD , Centre de Données astronomiques de Strasbourg, retrieved 2012-07-21 .
^
a
b Cowley, A. (November 1972), "Spectral classification of the bright B8 stars", Astronomical Journal , 77 : 750–755,
Bibcode :
1972AJ.....77..750C ,
doi :
10.1086/111348 .
^
a
b Crawford, D. L. (February 1963), "U, b, v, and Hβ Photometry for the Bright B8- and B9-TYPE Stars", Astrophysical Journal , 137 : 530,
Bibcode :
1963ApJ...137..530C ,
doi :
10.1086/147526 .
^ Evans, D. S. (June 20–24, 1966), Batten, Alan Henry; Heard, John Frederick (eds.), "The Revision of the General Catalogue of Radial Velocities", Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 , vol. 30, University of Toronto:
International Astronomical Union , p. 57,
Bibcode :
1967IAUS...30...57E .
^
a
b 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 .
^
a
b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics , 367 (2): 521–524,
arXiv :
astro-ph/0012289 ,
Bibcode :
2001A&A...367..521P ,
doi :
10.1051/0004-6361:20000451 ,
S2CID
425754 .
^
a
b Paunzen, E.; Schnell, A.; Maitzen, H. M. (December 2005), "An empirical temperature calibration for the Δa photometric system. I. The B-type stars", Astronomy and Astrophysics , 444 (3): 941–946,
arXiv :
astro-ph/0509049 ,
Bibcode :
2005A&A...444..941P ,
doi :
10.1051/0004-6361:20053546 ,
S2CID
119436374 .
^
a
b Abt, Helmut A.; Levato, Hugo; Grosso, Monica (July 2002), "Rotational Velocities of B Stars", The Astrophysical Journal , 573 (1): 359–365,
Bibcode :
2002ApJ...573..359A ,
doi :
10.1086/340590 .
^ Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters , 38 (11): 694–706,
arXiv :
1606.09028 ,
Bibcode :
2012AstL...38..694G ,
doi :
10.1134/S1063773712110035 ,
S2CID
119108982 .
^
"The Colour of Stars" , Australia Telescope, Outreach and Education , Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from
the original on March 18, 2012, retrieved 2012-01-16
External links