Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

sgl_imaging_challenge_banner_solar_25.thumb.jpg.f1d5d01d306644f613efd90ef96b314c.jpg

M81 and M82 (216 mins)
 
© D Elijah
Credit D Elijah
Image Tools

M81 and M82 (216 mins)

M81 and M82, Bodes Nebulae. Date of image 28/11/2016.

Hardware details: Camera: Canon 600D (astro modded). Telescope: SW Evostar 120 with Baader UHC-S filter. Mount: AZ-EQ6 guided using a ST80 synguider. Image details: Lights: 72 x 3min at ISO 800, Darks: 43 x 3min at ISO 800 (taken at the end of imaging), Lights and darks all separated by 15 sec intervals. Flats: 50 x 1/350s (taken from laptop monitor screen) at ISO 800, Bias: 50 x 1/4000 at ISO 800. Temperature ~-2 to -4 deg.

Image was precessed in DSS. Stacking was in median mode. Star detection 45%. Colours have been stretched and saturation is 30%. This is also 2x drizzled.

The weather was excellent. No clouds and very dry on the ground. There was also no wind and the seeing was very clear - the stars were really very still that night.

Comments:

As a change from my current MO of imaging strange, dim and exotic objects rising in the east, I thought I would go back to the classic galactic pair M81 and M82. This is the first shots of M81/82 where the star forming nebula in M82 can be seen I can also see the faint filaments in the outer arms of M81. In M82, the red star forming region crossing the main axis of the galaxy is just about seen but it is not very distinct. 

I wanted to see if the funny gradient I am seeing in my images is because of nearby lights to the east. M81 and M82 are to the North East and then later rise high so there was less chance of catching any ground lights. Looking at the image, there is still some gradient towards the bottom (-Dec) part of the image but this is much less than for objects in the east. Conclusion: probably neighbourhood lights. Solution: I have some spare flocking material stored somewhere. I could flock the inside of the dew shield. I should also try to check that I am stretching the images by the same amount to make better comparisons.

Credit

D Elijah

Copyright

© D Elijah

From the album:

Photos from Bury

  • 87 images
  • 1 comment
  • 43 image comments

Photo Information for M81 and M82 (216 mins)


Recommended Comments

There are no comments to display.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Add a comment...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.