HD 153261

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HD 153261
Observation data
Epoch J2000      Equinox J2000
Constellation Ara
Right ascension 17h 01m 47.3875s[1]
Declination –58° 57′ 29.681″[1]
Apparent magnitude (V) 6.137[2]
Characteristics
Spectral type B1 V:ne[3] or B2 IVne[4]
U−B color index –0.956[2]
B−V color index –0.078[2]
Astrometry
Radial velocity (Rv) –6[5] km/s
Proper motion (μ) RA: –2.91[1] mas/yr
Dec.: –9.01[1] mas/yr
Parallax (π) 2.32 ± 0.38[1] mas
Distance approx. 1,400 ly
(approx. 430 pc)
Details
Mass 10.1 ± 0.3[4] M
Radius 4.5[6] R
Luminosity (bolometric) 11,045[7] L
Temperature 21,150[7] K
Age 20.4 ± 0.4[4] Myr
Other designations
CD–58 6607, HD 153261, HIP 83323, HR 6304, SAO 244362, V828 Arae.[8]

HD 153261 is the Henry Draper Catalogue designation for a star in the southern constellation of Ara. It has an apparent visual magnitude of 6.137,[2] placing it near the threshold of naked eye visibility. According to the Bortle Dark-Sky Scale, it can be viewed from dark suburban or rural skies. Based upon an annual parallax shift of just 2.32 mas,[1] it is located at a distance of around 1,400 light-years (430 parsecs) from Earth.

This star has been catalogued with a stellar classification of B1 V:ne[3] or B2 IVne,[4] indicating that it is either a main sequence or a subgiant star. The 'n' indicates a nebulous spectrum created by the Doppler shift-broadened absorption lines from a rapid rotation, while the 'e' means this is a Be star, with the spectrum showing emission lines from hot, circumstellar gas. HD 153261 display some variability with an amplitude of 0.090 in magnitude, and is a suspected spectroscopic binary.[9]

HD 153261 is a large star with over ten[4] times the Sun's mass and around 4.5[6] the radius of the Sun. It shines with more than 11,000[7] times the brightness of the Sun, with this energy being radiated into space at an effective temperature of 21,150 K.[7] At this heat, it glows with the blue-white hue of a B-type star.[10]

References[edit]

  1. ^ a b c d e f van Leeuwen, F. (November 2007), Validation of the new Hipparcos reduction, Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357. 
  2. ^ a b c d Kozok, J. R. (September 1985), Photometric observations of emission B-stars in the southern Milky Way, Astronomy and Astrophysics Supplement Series 61: 387–405, Bibcode:1985A&AS...61..387K. 
  3. ^ a b Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1975mcts.book.....H. 
  4. ^ a b c d e Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (January 2011), A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun, Monthly Notices of the Royal Astronomical Society 410 (1): 190–200, arXiv:1007.4883, Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x. 
  5. ^ Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick, Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, University of Toronto: International Astronomical Union, retrieved 2009-09-10. 
  6. ^ 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: 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451. 
  7. ^ a b c d Hohle, M. M.; Neuhäuser, R.; Schutz, B. F. (April 2010), Masses and luminosities of O- and B-type stars and red supergiants, Astronomische Nachrichten 331 (4): 349, arXiv:1003.2335, Bibcode:2010AN....331..349H, doi:10.1002/asna.200911355. 
  8. ^ HR 6304 -- Be Star, SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2010-08-03. 
  9. ^ Lefèvre, L. et al. (November 2009), A systematic study of variability among OB-stars based on HIPPARCOS photometry, Astronomy and Astrophysics 507 (2): 11411201, Bibcode:2009A&A...507.1141L, doi:10.1051/0004-6361/200912304. 
  10. ^ The Colour of Stars, Australia Telescope, Outreach and Education (Commonwealth Scientific and Industrial Research Organisation), December 21, 2004, retrieved 2012-07-21. 

External links[edit]