Jupiter : a nice surprise (Bogdan Borz)

Contains: Solar system body or event

Jupiter : a nice surprise

Acquisition type: Lucky imaging

Finally clear nights are arriving. So I thought of trying to shoot Jupiter and Saturn again, even if the Jet stream is at 49 m/s. My plan was to begin installing early and try to collimate the OTA on an artificial star that I have. Of course I'm probably only 15-17 m away from the scope instead of 30-40m, placed it higher on a tree branch. It took me some time to finally be able to center it. Good. I go back and forth collimating with my camera. I need more backfocus in order to be able to focalise the star. Luckily I have an extension from the Televue 5x days. Ok; looks nicely collimated. Once I'm in place, I thought of checking the collimation again on Polaris. The focus is waay off ... and when it obtains, the collimation is catastrophic. So all the wasted time only to mess up the collimation completely. Mirror shift plus moving the primary so much for focus made it useless.

Collimation finished (the Airy figure is fictional of course, too much turbulence), I start filming Jupiter, Saturn is already too low. Doesn't look good on the screen, the Barlow 2.5 is alreay in place. Probably wasting my time with longer focal lengths with this seeing. Well, I'll shoot at least 3 films and change for the 2x. Done. And after stacking the images in Autostakkert and processing them in Astrosurface, a very nice suprise! Details popped up, really unexpectedly. Now I regreted having shot only 3 60s films, but at least I got the data. Sometimes astrophotography can offer nice suprises too.

AAA : Astronomes et Astrographes Amateurs
Astrophotographes (France)
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