NGC 7635

from Wikipedia, the free encyclopedia
Emission nebula
NGC 7635 (Bubble Nebula)

Section of the nebula with the bubble created by the stellar wind of BD + 60 ° 2522. False color image captured with the Hubble Space Telescope using line filters for oxygen (blue), hydrogen (green) and nitrogen (red).

Section of the nebula with the bubble created by the stellar wind of BD + 60 ° 2522. False color image captured with the Hubble Space Telescope using line filters for oxygen (blue), hydrogen (green) and nitrogen (red).
AladinLite
Constellation Cassiopeia
Position
equinox :  J2000.0 , epoch : J2000.0
Right ascension 23 h 20 m 45.6 s
declination + 61 ° 12 ′ 44 ″
Appearance

Apparent brightness  (B-band) 11.0 mag 
Angular expansion 15 ′ × 8 ′ 
Ionizing source
designation BD + 60 ° 2522 
Type O6.5 star 
Physical data

distance  7100 ly
history

discovery William Herschel
Date of discovery November 3, 1787
Catalog names
 NGC  7635 •  GC  4947 •  H  IV 52 •  h  2235 • LBN 549 • Sh2-162

NGC 7635 also bubble mist (engl. Bubble Nebula ), is an emission fog and HII region in the constellation Cassiopeia , which is about 7100 light-years from the earth is removed. It is located near the open star cluster Messier 52 . The name comes from a stellar wind bubble that was created by the stellar wind of an O star with the designation BD  +60 2522 (SAO 20575). The star emits large amounts of gas that spread out into the surrounding area at around 28 kilometers per second. In doing so, the expanding gases hit the huge surrounding molecular cloud in this region, which offers resistance to expansion. This creates a shock wave , which forms the outer shell of the gas bubble.
SAO 20575 has the brightness of 7.8 mag.

NGC 7635 was discovered on November 3, 1787 by the German-British astronomer William Herschel .

Web links

Commons : NGC 7635  - Album containing pictures, videos and audio files

Individual evidence

  1. ↑ NASA / IPAC EXTRAGALACTIC DATABASE
  2. ↑ SEDS: NGC 7635
  3. ↑ SuW 07.2016 p.10f
  4. ↑ Seligman