NGC 5998

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Open star cluster
NGC 5998
AladinLite
Constellation Scorpio
Position
equinox : J2000.0
Right ascension 15 h 49 m 38.2 s
declination -28 ° 34 ′ 42 ″
Appearance

Angular expansion 2 ′ × 1 ′
Physical data

Affiliation Milky Way
distance  3200 ly
(981 pc )
history
Discovered by Wilhelm Herschel
Discovery time April 30, 1786
Catalog names
 NGC  5998 •  ESO  450-19 •  GC  4140 •  H  VII 29 •

NGC 5998 is either an open star cluster or an asterism made up of a group of stars in the constellation Scorpio . It was discovered on April 30, 1786 by Wilhelm Herschel with an 18.7-inch reflector telescope, which read “A cluster of very small stars, pretty rich, 6 arcmin long, 4 arcmin broad; in the form of a parallelogram ”.

Web links

  • NGC 5998. SIMBAD, accessed May 22, 2016 .
  • NGC 5998. DSO Browser, accessed May 22, 2016 .

Individual evidence

  1. ↑ NASA / IPAC EXTRAGALACTIC DATABASE
  2. ↑ AL Tadross: A catalog of 120 NGC open star cluster . In: Journal of the Korean Astronomical Society , 44, 2011, pp. 1-11. doi: 10.5303 / JKAS.2011.44.1.1 .
  3. ↑ Seligman
  4. ↑ Auke Slotegraaf: NGC 5998. Deep Sky Observer's Companion, accessed on May 22, 2016 (English).