Thanks everyone! Though I was very happy with this result, I do wonder if higher resolution is possible, perhaps with a bigger stack of shorter exposures. One to consider on anothernight of good seeing.
Quote:
Originally Posted by Merlin66
Andy,
I'm using the GAIA catalogue which goes down to 21 mag (  )
By reducing the limiting magnitude to 15 mag you can see you're recording stars down to 14 mag.
There seems to be a couple of anomalies....
HD 303308 (8mag) is missing??
and you record a 8 mag star at:
RA 10h44m58.85s
Dec -57d42m22.7s
(This shows as an 11.6mag in Simbad) |
Hi Ken, you're totally right about the anomalous stars. It was what I was checking out vs the Hubble image when I realised I could see the nebula expanding! My first guess was that the image data for the
Hubble image (and a ground-based scope) included some IR over 1 micron and got stars behind the dust that I wouldn't see... but looking at the filters they used, this doesn't seem to be the case. So, answers on a postcard please, if you have any idea why stars so bright in one image don't show in the other, I'd love to know!! I'll look closer at your maps when I get back to my computer.