Jump to content

Summer Triangle Challenge

Planetary nebulae, EEVA-style

Martin Meredith

Recommended Posts

Half the fun is finding these things. Sometimes the colour is a dead giveaway.

I've observed NGC 6567 and totally agree about the rich star field, typical of the area. In my shot the planetary is distinctly blue, as you're getting too. There's a great triple at the right edge of the field (HJ 594) and I hadn't noticed the lovely arc of stars just to its lower right on my shot.

I'll have to add NGC 6537 to my list. I have a few more degrees of dec to play with here at 42 deg...


Link to comment
Share on other sites

  • 2 weeks later...

I found that virtualcolony.com/sac/ has useful lists of planetary nebulae down to very faint ones.  I printed off lists for Aquila and Cygnus down to mag. 15, lists that contain a number of planetaries not in the "!00 Brightest" list.  On June 25 2022 I had a go at some with NGC catalog numbers (easier to enter into Synscan). 

Gear: 102mm f5 achro, ASI224MC, EQ5 Synscan, captured with Sharpcap.  I targeted IC4846, NGC6766, NGC6772, NGC6778, NGC6785, NGC6807, NGC6833, NGC6881, NGC6894 and NGC7026 and identified almost all of them.  I had a problem with the colour of the stacked images. 

I was puzzled by NGC6766 which seems to be the same position, brightness and size as NGC6884 which I recorded last year - an easy blue object.

Three sample images are shown below.


ngc6785_001 22_42_58Z_.png

ngc6807_001 22_36_09Z_.png

  • Like 5
Link to comment
Share on other sites

During the early morning of 5 July I had a look at some PNs in Hercules. NGC 6210 was listed as an object of interest for June by the BAA Deep Sky Section / Callum Potter and discussed in an earlier BAA Journal article. https://britastro.org/wp-content/plugins/baa-frontend-tweaks/baa-check-file.php?filename=2022/06/NGC-6210-A-forgotten-planetary-nebula-in-Hercules.pdf.

It is known as the Turtle Nebula and is about 6000 ly away and Mag. 8.4. I took LRGB subs (5 seconds each) using Starlight Live feeding into Jocular for live stacking.



Another one I looked at was NGC 6058 which is 13,000 ly away and Mag 13. Again colour helps.



The third Hercules PN was Abell 39. This is about 3300 ly away and mag. 13.7. This was a bit ghostly and my snapshot consists of 40 L and 10 each of R, G and B.  I maybe need to go back on another darker night to look at this almost perfectly spherical planetary nebula again.



All my shots were with a Lodestar X2  and my 200 mm Newtonian at f/5. I usually use a focal reducer but left it out for these observations.



  • Like 9
Link to comment
Share on other sites

  • 1 month later...

Abell 59 - a somewhat faint PN in Sagitta was a challenge I could not resist. I have not been able to find anything about it. Below is my attempt. Look to the left of the label Abell 59 and just below a pair of stars is the beginning of a faint arc of fuzz - this corresponds to the brighter section of this PN.  Must do better next time - really need darker and more transparent skies and probably run the camera for longer but I enjoyed the challenge. This PN is probably one for the true imagers.



  • Like 2
Link to comment
Share on other sites

M 1-67 lies in Sagitta and is not strictly speaking a PN. The central star is a Wolf Rayet and has shed some material but it has yet to go bang and create the classic PN. It could be classed as a Wolf Rayet Nebula.  It would appear to have two shells which are expanding at about 100,000 mph. The big blast of material happened about 10,000 years ago and has created glowing blobs of gas/dust.




  • Like 2
Link to comment
Share on other sites

  • 5 months later...

It isn't often I get down as low as Fornax, but the opportunity arose this evening to observe NGC 1360 just after transit at around 18 degrees above the horizon.

I had no idea what to expect and could barely believe what appeared -- a large and relatively bright blue oval, the likes of which I've not seen anywhere in the sky. This is known as the Robin's Egg Nebula, and is a strong radiator of Oiii. I'd love to see this from lower latitudes.

It is rather noisy looking through the murk (check out the FWHM) and I had to turn the gain up which meant I hadn't any suitable darks to cancel the amp glow at bottom left, but this is EEVA...

There's a great image here: https://en.wikipedia.org/wiki/NGC_1360


  • Like 4
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.