Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's nebulae  ·  M 81  ·  M 82  ·  NGC 2976  ·  NGC 3027  ·  NGC 3031  ·  NGC 3034  ·  NGC 3077  ·  The star 22UMa  ·  The star 24UMa  ·  The star 27UMa
M81 Region and IFN, 



    
        

            Jan Curtis
M81 Region and IFN
Powered byPixInsight

M81 Region and IFN

Equipment

Imaging Telescopes Or Lenses
Nikon NIKKOR 180 F2,8 AIS ED
Imaging Cameras
Nikon d7100
Mounts
ORION Sirius EQ-G
Software
Noel Carboni's Astro Tools for PhotoShop Noel Carboni Actions · Photoshop CS 6 Adobe · PIXINSIGHT PixInsinght 1.8 RC7
Guiding Telescopes Or Lenses
Nikon NIKKOR 180 F2,8 AIS ED

Acquisition details

Dates:
Jan. 25, 2015 ·  Jan. 26, 2015 ·  Feb. 14, 2015 ·  Nov. 8, 2015 ·  Nov. 9, 2015 ·  Feb. 9, 2016
Frames:
77x100" (2h 8' 20") ISO1000
71x90" (1h 46' 30") ISO1000
50x150" (2h 5') ISO1250
116x90" (2h 54') ISO1600
81x150" (3h 22' 30") ISO2500
7x200" (23' 20") ISO3200
26x150" (1h 5') ISO4000
Integration:
13h 44' 40"
Avg. Moon age:
15.30 days
Avg. Moon phase:
19.11%
Bortle Dark-Sky Scale:
3.67
Temperature:
-2.50

Basic astrometry details

Astrometry.net job: 958145

RA center: 09h44m07s.7

DEC center: +70°0918

Pixel scale: 4.477 arcsec/pixel

Orientation: 90.077 degrees

Field radius: 2.996 degrees

Resolution: 620x483

Locations: Eldorado (6767' elev), @ Santa Fe, New Mexico, United States; Home observatory, Cheyenne, WY (elevation: 6014'), United States

Description

Taken at f/5. More subs make a difference!

I've added more subs and processed with my new 5K iMac: totaling +11 hours integrated time!

Version "H" adds 77 new subs.

Comments

Revisions

  • M81 Region and IFN, 



    
        

            Jan Curtis
    Original
  • M81 Region and IFN, 



    
        

            Jan Curtis
    E
  • M81 Region and IFN, 



    
        

            Jan Curtis
    F
  • M81 Region and IFN, 



    
        

            Jan Curtis
    G
  • Final
    M81 Region and IFN, 



    
        

            Jan Curtis
    H

Sky plot

Sky plot

Histogram

M81 Region and IFN, 



    
        

            Jan Curtis