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V1339 Aquilae

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Star in the constellation Aquila
V1339 Aquilae

A light curve for V1339 Aquilae, plotted from Hipparcos data
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 19 50 17.47943
Declination +07° 54′ 08.6934″
Apparent magnitude (V) 6.484
Characteristics
Spectral type B2.5IVe
U−B color index -0.7
B−V color index -0.1
Variable type Be star
Astrometry
Radial velocity (Rv)-30.10 ± 5 km/s
Proper motion (μ) RA: -0.77 ± 0.39 mas/yr
Dec.: -5.44 ± 0.46 mas/yr
Parallax (π)1.89 ± 0.45 mas
Distanceapprox. 1,700 ly
(approx. 500 pc)
Details
Mass13.0 M☉
Radius7.7 R☉
Temperature23310 K
Other designations
SAO 125116, HD 187567, BD+07° 4252, HIP 97607, HR 7554.
Database references
SIMBADdata

V1339 Aquilae, also known as HD 187567, is a Be star in the constellation Aquila. At its brightest its apparent magnitude is 6.22, making it barely visible to the naked eye at a location with very little light pollution. It is located just 8 arc seconds from the center of the open cluster NGC 6828.

V1339 Aquilae was discovered to be a Be star in 1925 by P. W. Merrill, M. L. Humason and C. G. Burwell. The star's variability was detected in 1966 by A. W. J. Cousins, R. Lake and R. H. Stoy, and because of this it was given its variable star designation, V1339 Aquilae, in 1979.

V1339 Aquilae is around 13 times as massive as the Sun and has 7.7 times its diameter. Its binary nature was discovered by speckle interferometry in 1983, at the Kitt Peak 4 meter telescope. At the time of these speckle observations the stars were separated by 0.057 arc seconds.

References

  1. EAS (1997). "The HIPPARCOS and TYCHO catalogues". Astrometric and Photometric Star Catalogues Derived from the ESA Hipparcos Space Astrometry Mission. ESA SP Series. 1200. Noordwijk, Netherlands: ESA Publications Division. Bibcode:1997HIP...C......0E. ISBN 9290923997. Retrieved 15 October 2022.
  2. ^ Catanzaro, G. (2013). "Spectroscopic atlas of Hα and Hβ in a sample of northern Be stars". Astronomy & Astrophysics. 550: 18. arXiv:1212.6608. Bibcode:2013A&A...550A..79C. doi:10.1051/0004-6361/201220357. A79.
  3. "General Catalogue of Variable stars". General Catalogue of Variable stars. Lomonosov Moscow State University. Retrieved 27 August 2024.
  4. Zejda, M.; Paunzen, E.; Baumann, B.; Mikulášek, Z.; Liška, J. (December 2012). "Catalogue of variable stars in open cluster fields" (PDF). Astronomy & Astrophysics. 548: A97 – A102. Bibcode:2012A&A...548A..97Z. doi:10.1051/0004-6361/201219186. Retrieved 27 August 2024.
  5. Merrill, Paul W.; Humason, Milton L.; Burrell, Cora G. (June 1925). "Discovery and Observations of Stars of Class Be". Astrophysical Journal. 61: 389–417. Bibcode:1925ApJ....61..389M. doi:10.1086/142899. Retrieved 27 August 2024.
  6. Cousins, A. W. J.; Lake, R.; Stoy, R. H. (1966). "Photoelectric magnitudes and colours of southern stars, II". Royal Observatory Bulletins (121). Bibcode:1966RGOB..121....1C. Retrieved 27 August 2024.
  7. Kholopov, P. N.; Kukarkina, N. P.; Perova, N. B. (April 1979). "64th Name-List of Variable Stars" (PDF). Information Bulletin on Variable Stars (1581): 1–8. Bibcode:1979IBVS.1581....1K. Retrieved 27 August 2024.
  8. McAlister, Harold A.; Hartkopf, William I. H.; Hutter, Donald J.; Franz, Otto G. (March 1987). "ICCD Speckle Observations of Binary Stars. II. Measurements During 1982 -1985 from the Kitt Peak 4 m Telescope". Astronomical Journal. 93: 688–777. Bibcode:1987AJ.....93..688M. doi:10.1086/114353. Retrieved 27 August 2024.
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