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Venus with Some Cloud Detail 4/25/23

Discussion in 'Astrophotography and Imaging' started by Orion25, Apr 27, 2023.

Venus with Some Cloud Detail 4/25/23

Started by Orion25 on Apr 27, 2023 at 3:34 PM

4 Replies 888 Views 1 Likes

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  1. Orion25

    Orion25 Well-Known Member

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    Following the advice of William A. Paolini in his article "Using Filters for Lunar/Planetary Observation" https://www.cloudynights.com/articl...-filters-for-lunarplanetary-observation-r3261
    I stacked the Baader Semi APO, Meade variable polarizer, and a #82A blue filter (I don't have the #80A that was suggested) along with a 2X barlow lens in an attempt to extract some cloud detail from Venus using my ASI224mc attached to my Orion 127mm Mak. I actually got a hint of something! I may have gotten more if I had used the #80A which would have darkened the image quite a bit at only 28% transmission (compared to the 73% of the #82A):
    ASTRONOMY - VENUS (APO-BLUE FILTER 82A) 4-25-23.jpg

    I hope to get the Baader Johnson U or perhaps the Astrodon U Venus someday and really get some serious cloudband!
     
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  2. Ed D

    Ed D Well-Known Member

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    Reggie, I think your image is really good, and I do see the detail. Bill P has posted many articles over the years with solid information.

    I have been wanting to image Venus but have not due to lack of time and energy, and/or weather. The next couple of weeks look promising for me, and hopefully the weather will cooperate. Keeping my fingers crossed.

    The last time I imaged Venus was in 2018, and had pretty good success. In 2012 I sketched an observation of Venus that caught detail. I used both #80A and UHC filters, probably stacked, for that one. When I did the 2018 image I used a ZWO 850nm IR Pass filter. I tried a 685nm filter with poor results. The #47 Wratten, which is reputed to be an excellent filter for Venus, turned out to be a huge disappointment for visual and imaging.

    I hope the following help:

    Venus 2012 01-23.jpg

    Venus 2018 06-16.jpg

    Subject: Venus
    Date: 06/16/2018
    Time: 21:00hr DST (06/17/2018 01:00 UT)
    Location: Miami, Florida 25.61N 80.42W
    Conditions: Not good, heavy haze and moisture.
    Instrument: TV-85
    Camera: ZWO ASI290MC
    Filter: ZWO 850nm
    Focal Ratio: f/21 using 3x Barlow
    Capture Image Size: 1936x1096
    Frames: 33sec Video
    Capture Software: SharpCap 2.9

    Notes:
    - Conditions not favorable, image shimmering.
    - Very large and heavy haze visible around moon.
    - Stacked using 20% frames.
    - Mild sharpening and gamma.
    - Attempts with 685nm and #47 Wratten results
    questionable.
     
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  3. Orion25

    Orion25 Well-Known Member

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    Thanks, Ed. Nice sketch! Also, thanks for your detailed imaging notes. I found an Antlia UVenus filter at around $200 on telescopes.net that I'm waiting on. I look forward to playing around with that one :p
    ant-u-venus-125_1.jpg
     
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  4. Ed D

    Ed D Well-Known Member

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    I did some reading and this looks like a good Venus filter. I'm looking forward to your images with that filter.

    Ed
     
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  5. Orion25

    Orion25 Well-Known Member

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    Astromania UV filter shot:
    ASTRONOMY - VENUS (UV FILTER ASTRO) 5-04-23 A.jpg


    Antlia UV filter shot (debayer off):
    ASTRONOMY - VENUS (UV ANTLIA FILTER) 5-26-23.jpg
     
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