HD 160529

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HD 160529
Observation data
Epoch J2000      Equinox J2000
Constellation Scorpius[1]
Right ascension 17h 41m 59.025s[1]
Declination −33° 30′ 13.71″[1]
Apparent magnitude (V) 6.77[1]
Characteristics
Spectral type A3Iae[1]
Details
Luminosity 400,000 L
Temperature 8,000 K
Other designations

HD 160529 is a hypergiant star located in the constellation of Scorpius. With an apparent magnitude of around +6.8 cannot be seen with the naked eye except under very favorable places, but it's easy to see with binoculars or amateur telescopes.

Physical characteristics[edit]

It has a spectral type of A3 and lies at a distance that has been estimated to be 2.5 kiloparsecs (8,200 light years);[2] however this distance is uncertain and values between 1.9 kiloparsecs and 3.5 kiloparsecs have been proposed.[3]

Assuming a distance of 2.5 kiloparsecs, it has an absolute magnitude of -8.9, a surface temperature of 8,000K, a mass of 13 solar masses, and is 330 times larger than our Sun.[2]

Most noticeably, HD 160529 is also classified as a low-mass luminous blue variable as both its brightness and spectral type have been observed to change between 1983 and 1991, fading 0.5 magnitudes and changing from A8 to B9; however its luminosity[2] has changed very little.[2]

Due to its relative low mass it seems to be a former red supergiant star.[2]

References[edit]

  1. ^ a b c d e f "HD 160529". SIMBAD Astronomical Database. Retrieved 2012-12-18. 
  2. ^ a b c d e Sterken, C.; Gosset, E.; Juttner, A.; Stahl, O.; Wolf, B.; Axer, M. (July 1991). "HD 160529 - a New Galactic Luminous Blue Variable". Astronomy and Astrophysics 247 (2): 383. Bibcode:1991A&A...247..383S. 
  3. ^ Stahl, O.; Gäng, T.; Sterken, C.; Kaufer, A.; Rivinius, T.; Szeifert, T.; Wolf, B. (March 2003). "Long-term spectroscopic monitoring of the Luminous Blue Variable HD 160529". Astronomy and Astrophysics 400: 279–291. arXiv:astro-ph/0212473. Bibcode:2003A&A...400..279S. doi:10.1051/0004-6361:20021908.