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Contains:  NGC 4725, NGC 4712
Getting plate-solving status, please wait...

NGC 4725

Technical card

Resolution: 3138x3139

Dates:May 24, 2019

Astrodon 50 mm G: 2x900" -20C bin 1x1
Astrodon 50mm B: 3x900" -20C bin 1x1
Astrodon 50mm L: 17x300" -20C bin 1x1
Astrodon 50mm R: 3x900" -20C bin 1x1

Integration: 3.4 hours

Darks: ~40

Flats: ~80

Flat darks: ~80

Bias: ~20

Avg. Moon age: 20.19 days

Avg. Moon phase: 70.22%

Mean SQM: 21.40 job: 2712276

RA center: 192.548 degrees

DEC center: 25.505 degrees

Pixel scale: 0.468 arcsec/pixel

Orientation: 359.166 degrees

Field radius: 0.289 degrees

Locations: KG Observatory, Julian, CA, United States

Data source: Backyard


Still waiting for lengthy clear skies. Luckily we had a 4-hour clearing last night between 9 PM and 1 AM with FWHM under 2" on 5-minutes subs. NGC4725 was nicely positioned during that time so I went for it. With only 85 minutes of luminance, the faint tidal streams cannot be resolved. I was happy to get most of the spiral structure. Hope to add more L and RGB data as the weather clears.

"While most spiral galaxies, including our own Milky Way, have two or more spiral arms, NGC 4725 has only one. NGC 4725 is over 100 thousand light-years across and lies 41 million light-years away in constellation Coma Berenices. The smaller galaxy, NGC4712, is 242 million light-years distant."






Used a noise mask to extract a bit more detail from the shadows.

Sky plot

Sky plot


NGC 4725,