Observation by Peter Tickner: Venus in October
Uploaded by
Peter Tickner
Observer
Peter Tickner
Observed
2021 Oct 30 - 13:46
Uploaded
2021 Nov 01 - 00:28
Objects
Venus
Equipment
- ZWO ASI174MM and ZWO ASI178MM
- IR pass 807 nm
- 2.1x Barlow with ASI174 image
- 14inch f/10 LX200ACF SCT
Location
Urban Berkshire
Target name
Venus
Title
Venus in October
About this image
Venus is only a target for me this elongation shortly before it passes the meridian in daytime. At 15 degrees altitude I had a window of nearly an hour but now it is barely clearing 11 degrees I only have about 20 minutes when it clears the local horizon (if the sky is clear!). This is a comparison of the image size obtained with an ASI178MM on 3oth October, the day after maximum elongation, with an image taken on 10th October with a 2.1x fused silica Barlow and the ASI174MM. Venus was a fifth larger although thinner on 30th but even allowing for that the ASI178 captures a significantly larger image without needing a Barlow.
The ASI178 is known to have better sensitivity at the UV end of the spectrum but in the brief window I had on 30th conditions were quite poor and I wasn't able to capture a sequence in UV that could be processed. As it was, only one of the four videos I took in IR was good enough to produce a reasonable image of Venus.
Peter
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