Thread: Venus at 0.06%
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Old 10-06-2020, 08:34 AM
N1 (Mirko)
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Join Date: Oct 2013
Location: Dunners Nu Zulland
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Venus at 0.06%

This crude image shows Venus at midday on 5 June 2020 NZT, 30 hours post-conjunction at almost exactly 2° from the centre of the solar disk so about 1.75° from the limb. Visually this was a gossamer-thin semi circle (at times a little more) which was difficult to locate but somewhat easier to track manually once found. Scope was the FS60, set up inside the dome of the Beverly Begg Observatory here in Dunedin, using the slot edge to block the sun. It was a great sight. The intention was to view it, then record a proper video at high power using the ASI, but the window we got in the cloud did not permit most of the latter, so an EP video and a low-power view at prime focus was all we managed to grab.

However. Squeezing the data from the eyepiece projection video (taken through a Vixen HR3.4 with the EOS6D+50mm EF) yielded an almost complete circle. Viewing conditions (and combined with low altitude of 21°) were considerably worse than 8 years ago when the ring was easily seen a degree and a half from the sun, but I'm not complaining. This image, while not aesthetically pleasing perhaps, still gives an idea of what was going on. The phase of Venus was annular.

Cooked in Pipp/AS/Registax, then some blurring in PS. Getting Pipp to recognise this as an object (error prompt "object my R's") was a challenge in itself.

Edit: have added a couple of raw shots approximating visual impression, and the obligatory SOHO view (credit: NASA/ESA) for illustration. Our views were mirrored horizontally because of the diagonal we used.
Attached Thumbnails
Click for full-size image (Venus 200605_3.jpg)
32.8 KB280 views
Click for full-size image (ASIPrimeFocusStill.jpg)
184.6 KB167 views
Click for full-size image (EPvidStillCrop.jpg)
15.0 KB179 views
Click for full-size image (SOHO 200605.jpg)
58.0 KB193 views

Last edited by N1; 10-06-2020 at 09:17 AM.
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