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Contains:  NGC 4051, NGC4051
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NGC 4051, 


            Gary Imm
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NGC 4051

Technical card

Dates:Jan. 19, 2020Jan. 20, 2020

Astrodon Blue 31mm Gen2 I-Series: 30x120" (gain: 111.00) -20C bin 1x1
Astrodon Green 31mm Gen2 I-Series: 30x120" (gain: 111.00) -20C bin 1x1
Astrodon Ha 31mm 5nm: 60x120" (gain: 111.00) -20C bin 1x1
Astrodon Red 31mm Gen2 I-Series: 30x120" (gain: 111.00) -20C bin 1x1

Integration: 5.0 hours

Avg. Moon age: 24.70 days

Avg. Moon phase: 24.32% job: 3235641

RA center: 12h 3' 10"

DEC center: +44° 31' 50"

Pixel scale: 0.494 arcsec/pixel

Orientation: -28.111 degrees

Field radius: 0.265 degrees

Resolution: 3208x2143

Locations: Backyard (Mag 20.8 - New Moon), Onalaska, Texas, United States

Data source: Backyard


This object is a spiral galaxy located 40 million light years away in the constellation of Ursa Major at a declination of +45 degrees. This magnitude 12.9 galaxy spans 5.5 arc-minutes in our apparent view, which corresponds to a diameter of 65,000 light years. The galaxy is inclined 40 degrees from edge-on.

The galaxy looks shrouded in some dust, as the details are not clear to me despite the fact that the stars look OK. The arms look somewhat fragmented, although many pink HII regions and bright blue star clusters are visible. The bright stellar core is indicative that this was one of the original six Seyfert galaxies listed in the 1943 discovery paper by Dr. Seyfert.



Gary Imm
License: None (All rights reserved)

Sky plot

Sky plot


NGC 4051, 


            Gary Imm