NGC 5189

NGC 5189

NGC 5189
NGC 5189 image taken with the Hubble Space Telescope on July 6, 2012.
Observation data
(Epoch J2000.0)
Right ascension 13h 33m 32.97s
Declination -65° 58′ 26.7″
Distance 3000 ly
Apparent magnitude (V) 8.2, 8.5p
Apparent dimensions (V) 90 × 62 arcsec
Constellation Musca
Physical characteristics
Radius ~1 ly
Absolute magnitude (V) -
Notable features A peculiar PN with a binary in the center
Other designations Spiral Planetary Nebula, Gum 47, IC 4274, He2-94, Sa2-95, PK 307-3.1

NGC 5189 (Gum 47, IC 4274, nicknamed Spiral Planetary Nebula) is a planetary nebula in the constellation Musca. It was discovered by James Dunlop in 1 July 1826, who catalogued it as Δ252.[1] For many years, well into the 1960s, it was thought to be a bright emission nebula. It was Karl Gordon Henize in 1967 who first described NGC 5189 as quasi-planetary based on its spectral emissions.

Seen through the telescope it seems to have an S shape, reminiscent of a barred spiral galaxy. The S shape, together with point-symmetric knots in the nebula, have for a long time hinted to astronomers that a binary central star is present.[2] Observations with the Southern African Large Telescope have finally found a white dwarf companion in a 4.04 day orbit around the rare low-mass Wolf-Rayet type central star of NGC 5189.[3] NGC 5189 is estimated to be 546 parsec.[4] or 1,780 light years away from Earth. Other measurements have yielded results up to 900 parsecs (~3000 light-years)[5]


  1. ^ Classic Deep-Sky and Double Stars : NGC 5189 (Mus) [2] Southern Astronomical Delights
  2. ^ Phillips J. P.; Reay N. K. (1983). "Ansae and the precession of central stars in planetary nebulae - The cases of NGC 5189 and NGC 6826". Astronomy and Astrophysics 117: 33–37. 
  3. ^ Manick R.; Miszalski B.; McBride V. (2015). "A radial velocity survey for post-common-envelope Wolf-Rayet central stars of planetary nebulae: first results and discovery of the close binary nucleus of NGC 5189". Monthly Notices of the Royal Astronomical Society 448: 1789–1806. 
  4. ^ "SIMBAD Astronomical Database". Results for NGC 5189. Retrieved 2012-12-21. 
  5. ^ SABIN L.; VAZQUEZ R.; LOPEZ J.A.; GARCIA-DIAZ M.T.; et al. (2012). "The filamentary multi-polar planetary nebula NGC 5189" (PDF). Rev. Mex. Astron. Astrofis 48: 165–76. 

External links

Media related to at Wikimedia Commons

  • NGC 5189 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
  • APOD 1995
  • Astronomy Picture of the Day - December 19, 2012
  • A Cosmic Holiday Ornament, Hubble-Style
  • Southern African Large Telescope: Elusive Binary System