Saturn Nebula

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Planetary Nebula
Data of the Saturn Nebula
The Saturn Nebula captured by the Hubble Space Telescope.
The Saturn Nebula captured by the Hubble Space Telescope .
AladinLite
Constellation Aquarius
Position
equinox : J2000.0
Right ascension 21h 04m 10.8s
declination -11 ° 21 ′ 48 ″
Appearance
Apparent brightness  (visual) 8.0 likes 
Apparent brightness  (B-band) 8.3 mag 
Angular expansion 0.58 ′ × 0.58 ′  
Central star
designation HIP 103992 
Apparent brightness 11.5 likes 
Physical data
Redshift -0.000 155 
Radial velocity -46.6 km / s 
distance 2400 ly 
history
discovery William Herschel
Date of discovery September 7, 1782
Catalog names
 NGC  7009 •  PK  37-34.1 •  GC  4628 •  H  IV 1 •  h  2098 • CS = 11.5 • Lalande 40765 • Struve 8 • Caldwell 55

The Saturn Nebula ( NGC 7009) is a planetary nebula in the constellation Aquarius . It has an apparent magnitude of +8.30 mag and a diameter of 0.5 '× 0.4'. It was discovered by William Herschel on September 7, 1782 , and was given the name Saturn Nebula by Lord Rosse , because the shape of the jets emerging from the sides is reminiscent of Saturn's rings .

Its distance is 2400 light years (according to Hynes), over 2900 light years (according to Sky Catalog) and 3900 light years (according to Burnham adopts O'Dell).

Visual observation

NGC 7009, recorded with an unmodified ToUcam on a 10 "SCT with a focal length of 1.5 m

The Saturn Nebula NGC 7009 can already be seen as a stellar object in small telescopes with an opening of approx. 60 mm. In a larger telescope with about 10 "aperture, NGC 7009 is already very noticeable, even if both the structures and the two jets are extremely difficult to observe and only under the best conditions.

The image on the left shows that the Saturn Nebula and its both jets are well within the photographic range of inexpensive amateur equipment.

Web links

Individual evidence

  1. ↑ NASA / IPAC EXTRAGALACTIC DATABASE
  2. ↑ a b c SEDS: NGC 7009
  3. ↑ a b SIMBAD
  4. ↑ Seligman