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Contains:  Owl nebula, M 97, NGC 3587
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Owl Nebula - M97, 





    
        

            Thomas Richter
Owl Nebula - M97

Owl Nebula - M97

Technical card

Resolution: 5213x3401

Dates:March 19, 2019March 20, 2019March 23, 2019

Frames:
Baader B 1.25'' CCD Filter: 11x300" (gain: 53.00) -20C bin 1x1
Baader G 1.25'' CCD Filter: 11x300" (gain: 53.00) -20C bin 1x1
Baader Ha 2" 7nm: 35x600" (gain: 200.00) -20C bin 1x1
Baader Planetarium O3 1.25" 8.5nm: 33x600" (gain: 200.00) -20C bin 1x1
Baader R 1.25'' CCD Filter: 11x300" (gain: 53.00) -20C bin 1x1

Integration: 14.1 hours

Darks: ~37

Flats: ~27

Avg. Moon age: 14.86 days

Avg. Moon phase: 95.91%

Astrometry.net job: 2603636

RA center: 168.697 degrees

DEC center: 55.013 degrees

Pixel scale: 0.494 arcsec/pixel

Orientation: 86.117 degrees

Field radius: 0.427 degrees

Locations: Nürnberg, Nürnberg, Bayern, Germany

Data source: Backyard

Description

Object description (wikipedia.org):

The Owl Nebula (also known as Messier 97, M97 or NGC 3587) is a planetary nebula located approximately 2,030 light years away in the constellation Ursa Major. It was discovered by French astronomer Pierre Méchain on February 16, 1781. When William Parsons, 3rd Earl of Rosse, observed the nebula in 1848, his hand-drawn illustration resembled an owl's head. It has been known as the Owl Nebula ever since.

The nebula is approximately 8,000 years old. It is approximately circular in cross-section with a little visible internal structure. It was formed from the outflow of material from the stellar wind of the central star as it evolved along the asymptotic giant branch. The nebula is arranged in three concentric shells, with the outermost shell being about 20–30% larger than the inner shell. The owl-like appearance of the nebula is the result of an inner shell that is not circularly symmetric, but instead forms a barrel-like structure aligned at an angle of 45° to the line of sight.

The nebula holds about 0.13 solar masses of matter, including hydrogen, helium, nitrogen, oxygen, and sulfur; all with a density of less than 100 particles per cubic centimeter. Its outer radius is around 0.91 ly (0.28 pc) and it is expanding with velocities in the range of 27–39 km/s into the surrounding interstellar medium.

Comments

Author

superelch
Thomas Richter
License: None (All rights reserved)
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Owl Nebula - M97, 





    
        

            Thomas Richter