NGC 6888

Database links to NGC 6888

Emission nebula
NGC 6888
Emission mist H-alpha / OIII
AladinLite
Constellation	swan
Position equinox :  J2000.0 , epoch : J2000.0
Right ascension	20 h 12 m 06.5 s
declination	+ 38 ° 21 ′ 18 ″
Appearance
Apparent brightness  (B-band)	10 likes
Angular expansion	18 '× 13'
Ionizing source
Physical data
Affiliation	Milky Way
distance	4700 ly
diameter	25 ly
history
discovery	Wilhelm Herschel
Date of discovery	December 15, 1792
Catalog names
NGC  6888 •  GC  4561 •  H  IV 72 • LBN 203 • Caldwell 27

NGC 6888 is an emission nebula in the constellation Swan , 4700 light years from Earth . It is also called Crescent Nebula , Sickle Nebula or Crescent Moon Nebula . NGC  6888 is illuminated by a so-called Wolf-Rayet star called WR 136 . Presumably, the gas in the nebula was also repelled from this star .

The emission nebula NGC 6888 was discovered on December 15, 1792 by the German-British astronomer Wilhelm Herschel .

• 

  Part of the emission nebula NGC 6888 recorded by the Hubble Space Telescope

• 

  NGC 6888 BiColor image taken with a 40 cm Newtonian telescope

• 

  NGC 6888 photographed through a 20 cm amateur telescope

Web links

Commons : NGC 6888  - Album containing pictures, videos, and audio files

• Hubble Space Telescope
• NGC 6888, the Crescent Nebula
• GoBlack
• Deep sky
• Image by Stefan Heutz
• Astronomie.de
• NGC 6888: X-Rays in the Wind - Astronomy Picture of the Day of October 16, 2003.
• Chandra observation
• ISSI publication Spatium No. 11: Cosmic Rays (PDF file; 469 kB)
• SIMBAD query
• NGC 6888: The Sickle Nebula - Astronomy Picture of the Day August 13, 2008.
• High-resolution and extraordinarily rich image from a remote observatory
• Spektrum.de : Amateur recordings [1] [2] [3] [4] [5]

Individual evidence

1. ↑ NASA / IPAC EXTRAGALACTIC DATABASE
2. ↑ ^{a b} SEDS : NGC 6888
3. ↑ Seligman