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Psi Aquilae

May 03, 2024

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).

Psi Aquilae
Location of ψ Aquilae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 19h 44m 34.19086s[1]
Declination +13° 18′ 10.0063″[1]
Apparent magnitude (V) 6.25[2]
Characteristics
Spectral type B9 III-IV[3]
U−B color index –0.22[4]
B−V color index –0.04[4]
Astrometry
Radial velocity (Rv)–18.3[5] km/s
Proper motion (μ) RA: +0.561[1] mas/yr
Dec.: –9.950[1] mas/yr
Parallax (π)2.8253 ± 0.0752 mas
Distance1,150 ± 30 ly
(354 ± 9 pc)
Absolute magnitude (MV)−1.17[6]
Details
Radius3.7[7] R☉
Luminosity341[6] L☉
Temperature10,814±232[8] K
Rotational velocity (v sin i)20[9] km/s
Age~247[10] Myr
Other designations
ψ Aql, 48 Aquilae, BD+12° 4059, HD 186547, HIP 97139, HR 7511, SAO 105199[2]
Database references
SIMBADdata

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 edit

  1. ^ 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.
  2. ^ a b c "psi Aql -- Star", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-21.
  3. ^ 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.
  4. ^ 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.
  5. ^ 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.
  6. ^ 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.
  7. ^ 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.
  8. ^ 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.
  9. ^ 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.
  10. ^ 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.
  11. ^ , 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 edit

  • Image Psi Aquilae

May 03, 2024
aquilae, latinized, aquilae, bayer, designation, star, equatorial, constellation, aquila, faint, star, with, apparent, visual, magnitude, which, according, bortle, dark, scale, seen, with, naked, dark, rural, skies, orbit, earth, causes, annual, parallax, shif. Psi Aquilae Latinized as ps 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 Psi AquilaeLocation of ps Aquilae circled Observation dataEpoch J2000 Equinox J2000 Constellation Aquila Right ascension 19h 44m 34 19086s 1 Declination 13 18 10 0063 1 Apparent magnitude V 6 25 2 Characteristics Spectral type B9 III IV 3 U B color index 0 22 4 B V color index 0 04 4 AstrometryRadial velocity Rv 18 3 5 km sProper motion m RA 0 561 1 mas yr Dec 9 950 1 mas yrParallax p 2 8253 0 0752 masDistance1 150 30 ly 354 9 pc Absolute magnitude MV 1 17 6 DetailsRadius3 7 7 R Luminosity341 6 L Temperature10 814 232 8 KRotational velocity v sin i 20 9 km sAge 247 10 Myr Other designationsps Aql 48 Aquilae BD 12 4059 HD 186547 HIP 97139 HR 7511 SAO 105199 2 Database referencesSIMBADdata 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 edit 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 amp Astrophysics 616 A1 arXiv 1804 09365 Bibcode 2018A amp 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 Donnees 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 Hb 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 amp 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 Da photometric system I The B type stars Astronomy and Astrophysics 444 3 941 946 arXiv astro ph 0509049 Bibcode 2005A amp 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 16External links editImage Psi Aquilae Retrieved from https en wikipedia org w index php title Psi Aquilae amp oldid 1170074706, wikipedia, wiki, book, books, library,

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