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NGC 6946: Fireworks Galaxy with SN 2017eaw

Contains: NGC 6946

Technical card

Resolution: 3900x2600

Dates: May 15, 2017May 16, 2017May 17, 2017May 19, 2017

Frames:
ZWO Blue: 73x150" (gain: 150.00) -20C
ZWO Green: 86x150" (gain: 150.00) -20C
Baader IR-Cut Moon & Skyglow Neodymium : 80x150" (gain: 150.00) -20C
ZWO Red: 76x150" (gain: 150.00) -20C

Integration: 13.1 hours

Avg. Moon age: 20.04 days

Avg. Moon phase: 70.89%

Astrometry.net job: 1582257

RA center: 308.675 degrees

DEC center: 60.159 degrees

Pixel scale: 0.920 arcsec/pixel

Orientation: 108.782 degrees

Field radius: 0.599 degrees

Description

Just the luminance stack so far. Still need to gather blue data.

Comments

Author

Chris Sullivan
Like

Revisions

B

Revision B has SN 2017eaw marked and is heavily cropped.

C

Managed to shoot blue after all!

D

RGB heavily cropped with the supernova marked.

E

Fixed color balance, reduced star sizes, slight levels/curves adjustment, more noise reduction around the edge of the galaxy.

F

Crop of revision E with the supernova marked.

G

Fixed histogram, adjusted hue saturation.

H

Crop of revision G with supernova marked.

I

Last pair of revisions - promise! Fixing some damage to stars in front of the galaxy caused by a sharpening mistake.

J

Crop of revision I with the supernova marked.

K

I lied - one last pair of revisions as the galaxy looked a tad too purple and the reds were a bit too saturated.

L

Crop of revision K with the supernova marked.

Sky plot

Sky plot

Histogram

NGC 6946: Fireworks Galaxy with SN 2017eaw, Chris Sullivan