Wray 17-96

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Wray 17-96
Observation data
Epoch J2000      Equinox J2000
Constellation Scorpius
Right ascension 17h 41m 35.2s[1]
Declination −30° 06′ 39.6″[1]
Characteristics
Spectral type B(e)[2]
Apparent magnitude (B) 17.8[3]
Apparent magnitude (R) 14.23[4]
Apparent magnitude (J) 6.707[1]
Apparent magnitude (H) 5.52[1]
Apparent magnitude (K) 4.796[1]
Variable type LBV?[5]
Astrometry
Distance 15,000 ly
(4.5[2] pc)
Details
Luminosity 1,800,000[2] L
Temperature 13,000[2] K
Other designations
2MASS J17413543-3006389, Hen 3-1453
Database references
SIMBAD data

Wray 17-96 is a very luminous star in the Scorpius constellation, about 15,000 light-years (4.6 kpc) away. It is a suspected luminous blue variable (LBV), although it has not shown the characteristic spectral variations.

Wray 17-96 has an absolute bolometric magnitude of −10.9 (1.8 million solar units), making it one of the most luminous stars known. The spectral type is peculiar, showing emission and absorption, sometimes both in the same line. Photospheric helium lines are visible indicating that the star is at least somewhat evolved. It is highly reddened by interstellar extinction and the visual brightness is reduced by nearly 9 magnitudes.[2]

Wray 17-96 is also notable for its highly symmetrical ring-shaped 10 M gas shell,[2] which was originally classified as a planetary nebula.[6]

References[edit]

  1. ^ a b c d e . Bibcode:2003yCat.1289....0Z.  Missing or empty |title= (help)
  2. ^ a b c d e f Egan, Michael P. et al. (2002). "An Infrared Ring Nebula around MSX5C G358.5391+00.1305: The True Nature of Suspected Planetary Nebula Wray 17-96 Determined via Direct Imaging and Spectroscopy". The Astrophysical Journal 572 (1): 288. Bibcode:2002ApJ...572..288E. doi:10.1086/340222. 
  3. ^ . Bibcode:1998USNO2.C......0M.  Missing or empty |title= (help)
  4. ^ . Bibcode:2009yCat.1315....0Z.  Missing or empty |title= (help)
  5. ^ . doi:10.1051/0004-6361/201118040.  Missing or empty |title= (help)
  6. ^ . doi:10.1093/mnras/sts393.  Missing or empty |title= (help)

External links[edit]