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Old 28-07-2020, 09:19 PM
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Paul Haese
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The Little Ghost nebula

This is a somewhat intriguing planetary nebula. Some of the professional images of it are taken in OIII, Ha and Nitrogen. This gives an almost Hubble palette of the object. So I thought I would try doing likewise. Alas that was not capable out of my meager instrument. The SII in this object is very faint and took quite a few hours just to get a reasonably bright image. In then end it did not add anything to the image.

The object is found in Ophiuchus at around 2500 light years. It is reasonably faint at 12.9 magnitude and would most likely have only shown a ring when observed by William Herschel. The fainter halo would not have been visible at all; perhaps only a faint nodule or two seen. An interesting challenge for anyone to try.

The image contains Luminance, Ha, OIII, and RGB. Totally 22.6 hours of integration.

Click here for the larger image.
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Last edited by Paul Haese; 28-07-2020 at 10:01 PM.
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Old 29-07-2020, 07:00 AM
Placidus (Mike and Trish)
Narrowing the band

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The long exposure has pulled out some as-you-say intriguing outer arches and rings, different in H-alpha and OIII.

Very tiny details extracted and perfect star field.

The beastie itself looks like a cross between the City of Sydney anchor logo and Hercule Poirot's moustache.
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Old 29-07-2020, 07:23 AM
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Ryderscope (Rodney)
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A fascinating object and definitely worthy of exploration. Nicely rendered Paul.
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Old 29-07-2020, 08:05 AM
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Atmos (Colin)
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Great little PN, with all of the exposure you’ve put into it it no longer looks like a faint little sucker
Very well done
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Old 29-07-2020, 08:21 AM
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multiweb (Marc)
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Nice pic. Any reason you didn't use the RC on this one?
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Old 29-07-2020, 09:52 AM
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Small PN, you've done well Paul. The colours look good. What's the lower right brightness?
Josh
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Old 29-07-2020, 03:10 PM
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Thanks guys for the comments, appreciated

Quote:
Originally Posted by multiweb View Post
Nice pic. Any reason you didn't use the RC on this one?
Hi Marc, the RC is not currently in commission at the observatories. It is on the dining room floor in the house down there. It will go into commission once I find a decent flattener for it. I have two mounts at present and five telescopes. Both the AG12's are in commission on the mounts.
Quote:
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Small PN, you've done well Paul. The colours look good. What's the lower right brightness?
Josh
Josh, that I think is a rather bright O star just out of the field of view.
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Old 29-07-2020, 04:26 PM
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multiweb (Marc)
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Quote:
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I have two mounts at present and five telescopes. Both the AG12's are in commission on the mounts.
You need more mounts or side by side plates.
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Old 29-07-2020, 06:15 PM
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Quote:
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You need more mounts or side by side plates.

I am working on getting another Bisque mount, but won't go back to side by side again.
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Old 29-07-2020, 07:32 PM
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Quote:
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I am working on getting another Bisque mount, but won't go back to side by side again.
Would one PME take two AG12s piggy backed? One focuser down and the other top up.
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Old 30-07-2020, 09:00 AM
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Quote:
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Would one PME take two AG12s piggy backed? One focuser down and the other top up.
Hmmm, probably not. The overall weight would be somewhere around 60kgs without including counter weights. It would be huge setup though.
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Old 30-07-2020, 09:01 AM
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Well done Paul!
Cheers,
Tim
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Old 30-07-2020, 12:12 PM
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Woohoo it's clear

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Yeah an intriguing little blighter and you've done a good job.

The HST image of it is very cool too.

Your result is quite interesting, I used SIIHaOIII too when I shot it three years ago and the structures in our respective images look quite different, I'm thinking your RGB might have been incorporated differently?

Either way a worthwhile, all be it very tiny, target

Mike
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