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Tuesday, December 26, 2017

Ornament Nebula

Ornament Nebula | NGC 5189  Image Credit : NASA

Ornament Nebula:

    Ornament nebula which is NGC 5189 nicknamed as Spiral Planetary Nebula. It can be located in the constellation of Musca over the night sky. This nebulae was first discovered by James Dunlop on 1 July 1826. He catalogued this nebula as 252. After many years of this discovery, it was thought to be a bright emitting nebula. But in the year 1967 a astronomer called Karl Gordon Henize who described this nebula as NGC 5189 as spectral emissions like quasi planetary model.


      It can be seen through the telescopes, it will have shape like "S" with barred spiral galaxy. For a long time, it hinted astronomers that there must be a central star present at the center of this nebula. 


     Astronomers from Southern African Large Telescope have found that it has a central star called NGC 5189 or Wolf-Rayet type central star and another white dwarf which rotates around the central star every 4.04 day. It is estimated to be at 1,780 light years away from our Earth and having 546 parsec. Measurements from other observatories have shown that the nebulae is about ~3000 light years away from Earth and having 900 parsecs.

More Information:

  1. Phillips, J. P., and N. K. Reay. "Ansae and the precession of central stars in planetary nebulae-The cases of NGC 5189 and NGC 6826." Astronomy and Astrophysics 117 (1983): 33-37.
  2. Blanco, V., et al. "Spectrum of the Central Star in NGC 5189.The Astrophysical Journal 152 (1968): L135.
  3. Reay, N. K., P. D. Atherton, and K. Taylor. "Kinematic structure of planetary nebulae–III. Condensations in NGC 5189." Monthly Notices of the Royal Astronomical Society206.1 (1984): 71-75.

Journal Credits : Google Scholar
Image Credit : NASA
Text Credit : Wikipedia


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