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Contains:  NGC 5195, Whirlpool galaxy, M 51, NGC 5194
Getting plate-solving status, please wait...
M51 enhanced with Hydrogen, 


            Andreas Dietz
M51 enhanced with Hydrogen

M51 enhanced with Hydrogen

Technical card

Resolution: 1026x1062

Dates:March 30, 2017Feb. 24, 2018

B+W 486 UV/IR block: 314x30" ISO1600
Baader Planetarium Ha 36mm 7nm: 496x30" (gain: 270.00) -3C bin 1x1

Integration: 6.8 hours

Avg. Moon age: 5.65 days

Avg. Moon phase: 35.46%

Temperature: -8.00 job: 1958856

RA center: 202.489 degrees

DEC center: 47.229 degrees

Pixel scale: 1.067 arcsec/pixel

Orientation: 357.681 degrees

Field radius: 0.219 degrees

Locations: Home Observatory, Regensburg, Bavaria, Germany

Data source: Backyard


My whirlpool project is growing! Two weeks ago the first clear weather period since 6 months was exactly at waxing moon, and all winter objects were disappearing. So I decided to direct my 8 inch reflector to the few objects with at least a little narrowband portion, e.g. M51 and M82. It was quite surprising how many Ha regions in M51 popped up! Here I'd like to present the combination of my M51 RGB exposure from last year and the latest Ha exposure to you. As always without guiding...



Andreas Dietz
License: Attribution-ShareAlike Creative Commons


  • M51 enhanced with Hydrogen, 


            Andreas Dietz
  • Final
    M51 enhanced with Hydrogen, 


            Andreas Dietz


crop to same FOV as in the original image

Sky plot

Sky plot


M51 enhanced with Hydrogen, 


            Andreas Dietz