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Contains:  NGC 5477, NGC 5473, M 101, NGC 5457
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Messier 101 - M101 - The Pinwheel Galaxy (Spiral Galaxy), 





    
        

            Randal Healey
Messier 101 - M101 - The Pinwheel Galaxy (Spiral Galaxy)

Messier 101 - M101 - The Pinwheel Galaxy (Spiral Galaxy)

Technical card

Resolution: 3111x2375

Dates:Feb. 6, 2019Feb. 8, 2019Feb. 9, 2019Feb. 10, 2019Feb. 14, 2019Feb. 16, 2019

Frames:
Astrodon BLUE 36mm - Gen2 E-Series Tru-Balance: 9x300" -20C bin 1x1
Astrodon BLUE 36mm - Gen2 E-Series Tru-Balance: 13x600" -20C bin 1x1
Astrodon GREEN 36mm - Gen2 E-Series Tru-Balance: 9x300" -20C bin 1x1
Astrodon GREEN 36mm - Gen2 E-Series Tru-Balance: 13x600" -20C bin 1x1
Astrodon HA 36mm - 5nm: 6x1200" -20C bin 1x1
Astrodon HA 36mm - 5nm: 12x600" -20C bin 1x1
Astrodon RED 36mm - Gen2 E-Series Tru-Balance: 10x300" -20C bin 1x1
Astrodon RED 36mm - Gen2 E-Series Tru-Balance: 14x600" -20C bin 1x1

Integration: 13.0 hours

Darks: ~50

Flats: ~50

Bias: ~100

Avg. Moon age: 5.66 days

Avg. Moon phase: 35.10%

Astrometry.net job: 2557063

RA center: 210.713 degrees

DEC center: 54.394 degrees

Pixel scale: 1.575 arcsec/pixel

Orientation: 191.968 degrees

Field radius: 0.856 degrees

Locations: Healey "Utahopia" Observatory, Kaysville, Utah, United States

Data source: Own remote observatory

Description

Messier 101 - M101 - The Pinwheel Galaxy (Spiral Galaxy)

M101 is a large face-on spiral galaxy located 22 million light-years away in the constellation of Ursa Major. it can be glimpsed in binoculars or small telescopes from dark sites. However, this galaxy suffers from low surface brightness and in bad seeing conditions or light polluted areas is sometimes difficult to spot even with the best telescopes. M101 is best seen from the Northern Hemisphere during the months of March, April and May.

M101 is also known as the Pinwheel galaxy and was discovered by Pierre Méchain on March 27, 1781. He described it as "nebula without star, very obscure and pretty large, 6' to 7' in diameter, between the left hand of Boötes and the tail of the great Bear."

Comments

Author

RandalHealey
Randal Healey
License: None (All rights reserved)
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Messier 101 - M101 - The Pinwheel Galaxy (Spiral Galaxy), 





    
        

            Randal Healey