October’s “Sky at Night” magazine has quite a few lunar images. The regular “Moonwatch” article is about the crater “Alexander” and its environs. Alexander is a difficult to identify eroded crater. In particular it talks about “Alexander’s beaded rim” about which it says “The peaks that define Alexander’s western rim appear like tiny stars arranged in a beautiful arc”. I have to confess that from the images in the magazine, this clair-obscur effect totally eluded me.
So, as I now have quite an extensive set of window-sill based images (of varying quality!) of the Moon in a variety of phases a bit of data mining was indicated. I found the following image which I cropped and labelled the features to be approximately the same as that in the magazine;
Then, after a bit of contrast stretching in GIMP, we get this:
NOW I can see an effect, although whether it is the one they were talking about, I don’t know! It is pretty though.
While looking at this image set, nearby there was also a pretty good manifestation of the Lunar “V”.
I have been trying for a long time to get a reasonable image of Mons Rumker to add to my lunar dome images. See https://roslistonastronomy.uk/more-lunar-dome-spotting-from-the-window-sill-25-07-2018
Rumker, being so close to the limb, is very tricky to get the terminator lighting and libration state right. Here is another go tonight. Slightly better than the last effort above, I fancy, but still not wonderful.
Quite a good Lunar X and V this evening. It was still light so contrast is a bit lacking, but the instant readiness of the window-sill observatory proved its worth again as an hour later the apparition had disappeared. Also see https://roslistonastronomy.uk/lunar-x-and-v-from-the-window-sill-21-06-2018 for previous effort. I think this “X” is better.
Roger has very kindly reprocessed my recent Moon image in Registax for me.
He comments: “I actually usually find “wavelets” in Registax more useful for sharpening, at least initially.”
QHY10 camera, Sky Watcher Equinox Pro 80mm OTA, TS OAG/flip mirror, Lichfield, August 2019, Andrew Thornett/extra processing by Roger Samworth.
This post follows on from my previous post:
Applying Lucy-Richardson sharpening in GIMP to my previous Moon image
My original Moon image:
Roger’s reprocessed image in Registax:
Settings Roger used on Registax:
Had a go at applying small amount of Lucy-Richardson sharpening in GIMP (in G’Mic plug-in) to my previous lunar image – let me know if you think it is an improvement or not…..
[How to find this filter: After installing G’Mic plug-in into GIMP, click on “Filters” in GIMP. GMIC should appear at the bottom of the drop-down list. Click on that.]
Prime focus with Canon 60D attached to SW200p last night when Saturn was at culmination (15 degrees) but still low enough to give a blurry image. My first photo of this planet. Jupiter was even lower but with iso800 the 4 Galilaen moons show up well but planet massively overexposed. The nearby full Moon also reduced the contrast. Attempted eyepiece projection but gave up trying to get the fast moving image in the camera lcd. Have an HEQ5 Pro for collection from RVO on Monday which should help track images and eventually get photos of some faint DSO’s. Thanks to Andy T for the demo of his HEQ5.
I attempted to pull detail out of my lunar image this morning in GIMP2 – I suspect I have probably overdone it but it is fun trying!