Let's find Neptune. - reprocessed

[ving (David)]

i dont use a telrad andrew

i suspect you are right paul. and that asteriod looks suspect too... well to me it does.

[mojo (Terry)]

Originally Posted by [1ponders]

There is probably a fair bit of misalignment in the two images ving, I'd say that is the case for yours, though I've been looking closely at the images and I can see at leas 6 possibly 10 suspect movements.

Have you tried loading both images as layers in photoshop and change the top layer's blending mode to 'Difference'. You might more easily see what has changed in the two images.

[[1ponders] (Paul)]

Yes Terry, that's how I initially aligned them, it's a great tool for this sort of alignment. But because the centers of both images weren't at exactly the same position in RA and DEC trying to find the center of rotation for alignment was a bit challenging, as it wasn't the center of the images.

I wasn't too concerned about it at the time as these two were just a preliminary animation while I waited to catch a couple more nights. But after seeing how well they turned out I'm tempted to go back to the originals and do a better job of the processing and alignment.

[iceman (Mike)]

Can't you use registar to compensate for that rotation?

[[1ponders] (Paul)]

I would Mike, but I don't have it unfortunately. It would be perfect for the job. It's one of these things I'd love to have but keeps getting put back on the shelf when other "must haves" come along

I've reprocessed the images in PS to get them closer in appearance, one is still slightly brighter, plus I've realigned them. For some reason this time I couldn't get under the image size restrictions with the original image sizes so this animation is slightly smaller.

I've also had a closer look at those "UMO"s (Unidentified Moving Objects). Sorry to disapoint, but they are hot pixels that didn't get removed during dark subtraction

[middy]

Great effort Paul. Great minds think alike. I just posted my effort that I have been working on for the past 3 weeks (see Neptune's Travels thread).

I don't know how you managed to keep your image so large and still keep it under 150k. I had to shrink it right down and convert it to greyscale.
It lost a lot of its appeal after that. [Edit - Worked it out now....]