Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  NGC 5477, NGC 5473, M 101, NGC 5457
Getting plate-solving status, please wait...
M101, The pinwheel galaxy, 





    
        

            Steven Bellavia
M101, The pinwheel galaxy

M101, The pinwheel galaxy

Technical card

Resolution: 4200x2800

Dates:June 23, 2019

Frames:IDAS UIBAR-III: 39x120" (gain: 100.00) -15C bin 1x1

Integration: 1.3 hours

Darks: ~25

Flats: ~30

Flat darks: ~30

Avg. Moon age: 20.45 days

Avg. Moon phase: 67.72%

Bortle Dark-Sky Scale: 4.00

Mean SQM: 21.50

Mean FWHM: 4.50

Temperature: 15.00

Astrometry.net job: 2760537

RA center: 210.801 degrees

DEC center: 54.372 degrees

Pixel scale: 1.360 arcsec/pixel

Orientation: 1.894 degrees

Field radius: 0.953 degrees

Data source: Traveller

Description

The Pinwheel Galaxy, M101 (NGC 5457) is a face-on spiral galaxy 21 million light-years from Earth in the constellation Ursa Major. Discovered by Pierre Méchain on March 27, 1781, it was communicated to Charles Messier who verified its position for inclusion in the Messier Catalog as one of its final entries.
The giant spiral disk of stars, dust and gas is 170,000 light-years across — nearly twice the diameter of our galaxy, the Milky Way. M101 is estimated to contain at least one trillion stars. The galaxy’s spiral arms are sprinkled with large regions of star-forming nebulae. These nebulae are areas of intense star formation within giant molecular hydrogen clouds. Brilliant, young clusters of hot, blue, newborn stars trace out the spiral arms.
M101 has an apparent magnitude of 7.9. It can be spotted through a small telescope and is most easily observed during April.

Comments

Author

bellavia
Steven Bellavia
License: None (All rights reserved)
1870
Like

Sky plot

Sky plot

Histogram

M101, The pinwheel galaxy, 





    
        

            Steven Bellavia