NGC 5189
NGC 5189 (Gum 47, IC 4274, nicknamed Spiral Planetary Nebula) is a planetary nebula in the constellation Musca. It was discovered by James Dunlop on 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]
References
External links
Media related to NGC 5189 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
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Coordinates: 13h 33m 32.97s, −65° 58′ 26.7″