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Posts posted by Pete Presland
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Venus is a tough target, even when you have big aperture and a mono camera. The phase is showing quite nicely though.
I think my corrector plate blocks some of the signal, but obviously i have nearly twice your aperture.
What time did you capture at?
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Very nice Neil, some terrific details on the surface to go with the rings.
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Excellently captured and presented, a record to be very proud of! well done to you 🙂
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"Stella" hasn't done to badly, i am sure there is much more to come later this year especially. Those 462 cameras seem to be rarer than "rocking horse poo" at the moment. other than the player one version.
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Some nice details visible there Neil, that is a proper early start mate 🙂
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Excellent result, the rotation clearly visible there.
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good looking images Neil, at the best time of the day. Looking at my images of Saturn from last year, the ring tilt has really reduce, makes me think of my first ever Saturn image from 2009 they were edge on i think
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4 hours ago, Space Cowboy said:
My first light with the qhy462 mono was at approx f20 and that was smaller than your image. I then swapped to around f14 and the difference was striking.
Bear in mind the 462 sensor is much more sensitive to UV than the 290 so if f20 is too much for the 462 it's going to make the 290 really struggle.
Thanks for linking me to this thread @Space Cowboy I was trying to remember where i had seen the images. The difference is considerable between the two focal lengths.
With my X1.8 Barlow i should at F18, but with the filter wheel i suspect it is over F20.
I think i a 462 camera is going to be placed on the "wish list" as well.
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7 hours ago, Space Cowboy said:
I can't do any better Pete. Your image scale is very large at least 30% larger than what I've been shooting at and your scope is smaller than mine so your signal is very weak. I think thats the main issue.
I am over sampled when using my Asi290mm & x1.8 Barlow, but with the filter wheel as well maybe it is just too way too much.
I will check on WinJupos to see what the FL is that i am imaing at.
Thanks for trying with the data 🙂
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9 hours ago, Space Cowboy said:
Possibly the SCT is not helping but I think there is more in that image. I'd be interested to have a play with a stacked TIFF file straight out of AS3 if you like. 🙂 Quite often I've been initially disappointed with my UV shots.
I would be more than happy to share it with you Stuart. I have included another which i thought was decent data as well.
I will be very interested in what you can achieve, i could see a distinct dark feature nearer the limb on my effort which is also visible on a few images posted on here from the same evening.
Ven_19_26_19_UV_03_06_2023_ZWO ASI290MM_lapl6_ap1.tifVen_20_04_37_UV_03_06_2023_ZWO ASI290MM_lapl6_ap1.tif
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Thanks Stuart, certainly improved the detail. I cant help thinking the SCT is maybe not the best scope for UV imaging, i am sure the corrector plate blocks some of the UV signal, compared to Newtonian telescopes.
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3 minutes ago, Kon said:
I agree and it's the reason I decided to stop UV imaging but some IR imaging is in the books for the thin crescent.
I think from memory, i think i have managed a 3% illuminated disc. Obviously this depends on the separation from the sun, not looked yet to see how far apart they are this time. I think again from memory when i captured last time it was over 10 degrees.
Still very close and precautions must be taken to avoid accidents. I use my shed to make it impossible to accidently point at the Sun.
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Despite the fine conditions, this is a pretty disappointing result from 03.06.2023 😞
Been messing around with this data for a week, but unable to do any better than this in terms of cloud detail. Normally would be satisfied but, the conditions looked excellent across the UK. Proved by the superb images on here captured at the same time.
The usual set up C9.25, Baader UV filter, X1.8 Barlow. Stacked in A/S3, Sharpened in Reg6 and C/S2.
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A fine image to finish on, been a great view weeks for you, thank you for sharing your images.
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A fine looking view, good to see the subtle clouds on show there.
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Very nicely captured, a good phase showing there.
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Interesting view as others have said, it does feel like the best time has passed. It will be interesting to see the arc size grow and phase shrink over the coming weeks. I have captured a pretty thin crescent before and hopefully there will be a chance again this time.
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Very nicely captured Stuart, it is very interesting to see the change of features from one day to the next. Good info to remember as well, as it can make you think something is wrong with the conditions due to the lack features seen in previous images.
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Looks a good start Neil, not particularly easy at the moment given the position, even when the seeing is decent. Some nice detail visible nonetheless.
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A great start with the new camera, terrific images from registax before processing as well.
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Still some nice details there despite the conditions.
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Good looking image, the 462 is certainly doing the business for you.
With my 290mm at the weekend i was using the following setting, FPS (avg.)=49, Shutter=20.12ms, Gain=390 (65%) this was at around F20 with my C9.25.
Still faffing around with the data though, trying to something as good as i have seen on here this weekend 🙂
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Its a fine effort, especially considering the current position of Saturn at the moment. Best time of the day as well, before all the idiots wake up!
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Really fine images again, good to see you have sorted the artefact out on the colour image.
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Venus UV (17/06/2023)
in Imaging - Planetary
Posted
A fine looking image there, still some clouds visible.