Contains: NGC 3077, M 82, NGC 3034, M 81, Bode's nebulae, NGC 3031
Getting plate-solving status, please wait...

M81 82 F/7.2

Technical card

Resolution: 3030x2302

Dates: March 3, 2017

Frames: 224x300"

Integration: 18.7 hours

Avg. Moon age: 5.24 days

Avg. Moon phase: 27.98%

Astrometry.net job: 1709786

RA center: 149.642 degrees

DEC center: 69.307 degrees

Pixel scale: 1.756 arcsec/pixel

Orientation: 269.788 degrees

Field radius: 0.928 degrees

Locations: Backyard pier, Celina, Texas, United States

Description

Another reference image with the SW120 Esprit.. I really need to go back to PSD to mix in Ha with galaxies. My attempt to do so in PI is lacking. This was again at the native F/7.2 from a pretty bright suburban location. Almost can get into the faint clouds.. Thinking that next year the 6120 camera will make that a bit easier. Of course heading to a good dark location make sense too. Hard to leave the comforts of home.

Comments

Author

Ron Crouch
Like

Revisions

B

Just trying to learn some new tools! This version had the RGBL masters built using LocalNormalization tools in PI. Also, rather than adjust color using spiral directly as white reference I used PhotometricColorCalibration tools. No Ha in this one at all.. 81x300L; 26x300B; 27x300G; 32x300R.. Black point a bit high to show all the dust in the region - somewhat poorly..

C

Another pass with PCC color calibration. Better noise reduction and a bit darker. Also got a little more saturation in the galaxies. No Ha data.. This was 81x300L; ~30x300RGB. SW120 F/5.2 with Riccardi 0.75 reducer. Gotta gt to a darker location to best show the dust.

Sky plot

Sky plot

Histogram

M81 82 F/7.2, Ron Crouch