Lunar images 2014 September 09 & 11

On the 9th seeing was not too good, but this image does show up some of the clefts in Hevelius and the irregular dome in Grimaldi. The vague gash extending from Riccioli away from the terminator is known as the ‘Miyamori Valley”. It is not really a valley at all, but a conjunction of shadows.Moon2014-09-07-2349-DLASeeing was better on the 11th and the image of the Messier twins shows their structure clearly. As Bill Leatherbarrow, BAA Lunar Section Director comments, the multiple west wall of Messier A is probably responsible for most of the historical anamalous observations of this pair.Moon2014-09-11-0142-DLAMoon2014-09-11-0142large-DLAMoon2014-09-11-0138-DLAMoon2014-09-11-0149-DLA


Comet 2014 E2 (Jacques) 2014 September 01

I thought I should take Jacques with a longer focal length than I used on August 05 with the Hyperstar, so I imaged it here with my 100mm f/9 refractor at prime focus with a Canon EOS 400D (as it’s inconvenient to remove the QHY8 CCD camera from the Hyperstar).

A couple of things went wrong with this image. Firstly the exposure I chose was too long:  there is noticeable drift of the comet in 2 minutes at this image scale, so it is not as round as it should be. Secondly, it clouded over after I had only got 6 subs.

I have tried stretching the image and inverting it, as I did before, but there is no evidence of a tail here at all (though this is a much better calibrated image than the Hyperstar one).

Processing was in Nebulosity 2, and Photoshop CS4 using GradientXterminator and Neat Image plug-ins.

(Click to enlarge)


Comet 2014 E2 (Jacques) 2014 August 05

Here’s Comet Jacques from last night. 20 one minute exposures stacked on the comet.

There are some colour gradients in the background that I haven’t been able to correct, I possibly need need better flat fields.

No trace of a tail in this image, though people have imaged a faint tail from darker sites.

I think this is the nicest dark-sky comet we have had fore a long time, possible since Holmes. It was just visible in 10×50 binoculars, and in a 100mm refractor it was a very nice sight.



Update: 7 August

On Richard Miles’ suggestion I tried radically stretching the image. I also inverted it and made it mono, and lo and behold, a tail is visible, to the right (west).


Jupiter 2013 December 10

I had a busy night; seeing was unusually good for this location. Ian Sharp reported exceptional seeing in Sussex as well, but Damian Peach, in a different part of Sussex, reported poor seeing, strangely.

First row are RGB composites. Second row are the same data but presented using an LRGB process, which gives more contrasty results, but worse artefacts. Third row are Infra-red images at 742nm, with Callisto just emerged from occultation in the second one.

In total, 24 one-minute videos were processed to give this set. Click twice for full-size.j2013-12-10_irgb_DLA

IC 5067 narrowband (part of the Pelican Nebula)

Here is an attempt at narrowband imaging with the 10″ f4.8 last night. The light frames total 115 minutes. The palette used is R and L = H alpha, G = 0III, B = SII. Almost all the nebula information is in the H alpha, there’s just a trace of SII emission and little trace of OIII, hence it’s basically red. Processing was in Nebulosity and Photoshop CS4 with Neat Image plugin. (Click to enlarge image)