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Solar transit of the ISS 25 April 2018 and AR12706

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  • 27 April 2018 at 10:51 am #574013
    Dave Smith
    Participant

    Something I have wanted to do for years is to catch the ISS crossing the Moon or Sun. An opportunity arose on Wednesday morning as I had received a prediction from CalSky that the ISS would cross the face of the Sun at around 9:35 am. I had no idea of which part of the Sun it would cross and as my field of view through the Quark is quite limited it was going to be pot luck as to whether I pointed at the correct part of the Sun. I chose to point at the only small Sunspot and wow how lucky I was !!!

    http://astrosnaps.co.uk/ISSanim.gif

    Here is a processed image of AR12706 from the video.

    Dave Smith

    Attachments:
    1. AR12706-20180425

      AR12706-20180425.jpg

    27 April 2018 at 11:00 am #579379
    Jeremy Shears
    Participant

    That’s a great animation, Dave! And you were so lucky to have it passing close to the AR.

    Are you able to make a composite image showing the ISS in transit?

    All the best,

    Jeremy

    27 April 2018 at 12:04 pm #579380
    Dave Smith
    Participant

    Thanks Jeremy. I did try to produce a composite image using the above as background but couldn’t get it to look right. I might try again just using the video frames. That may not work because of the wobble in the atmosphere.

    Dave

    28 April 2018 at 12:22 pm #579387
    Michael O’Connell
    Participant

    Very nice capture Dave. Well done.

    As it happens, I just visually observed the ISS carry out a similar solar transit.

    The speed is phenomenal!

    Michael.

    29 April 2018 at 11:25 am #579390
    Dave Smith
    Participant

    Thanks Michael. Was your transit expected or did you see it by chance? Which ever it was likely very exciting.

    Dave

    29 April 2018 at 3:56 pm #579392
    Michael O’Connell
    Participant

    Hi Dave,

    I was prepared for it. I registered with calsky.com and receive daily email alerts of satellites transiting the Sun and Moon.

    Regards

    Michael.

    29 April 2018 at 5:15 pm #579393
    Nick James
    Participant

    Great video. If you stack the frames using minimum pixel hold you should be able to get a nice still showing it moving across. I’ve only ever succesfully imaged this once on 2011 May 25 using a DSLR. Each video frame was minimum pixel stacked to get this effect.

    30 April 2018 at 9:03 pm #579394
    Dave Smith
    Participant

    Thanks Nick. Took me a little while to see what you meant as I’m not really a PI user but it worked fine.

    Dave

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