ISS Solar Transit 2022.06.22

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nicosolcy
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ISS Solar Transit 2022.06.22

Post by nicosolcy »

About 5 days ago, it seemed the ISS would transit over my office building. Obviously, an ideal scenario. Unfortunately, there was probably an orbital adjustment and the center line of the transit moved a 40 minute drive away. Irked about it, I gave up, but this morning I said “Nay! I shall not surrender! I shall capture this!”.

Armed with a 2.5 hour leave of absence from work, I set off and drove to a field to set up. Transit lasted 0.54 seconds at 13:19:46 and it appeared on time, albeit it was not a precise center crossing, despite me setting up 200 feet from the supposed spot of a center transit. Red spot is where I was situated, dotted black line was the supposed center path.

Lessons learned for next attempt:

1. Increase gain to drop capture to say below 3ms to “freeze” the ISS
2. Switch to 8 bit to capture more frames with the ISS transiting
3. Get a camera with a faster frame rate to capture even more frames
4. Ignore critical sampling if necessary and image at a shorter focal length to use different camera (I used the 183MM) and still get full disk

I am quite happy with the result and will be better prepared for future transits. I have to say, my heart was racing and I started the capture run 20 seconds before the transit, watching my laptop monitor like a hawk. I was screaming with excitement as I saw the ISS on my screen and KNEW that I captured it!
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1F0FEFE7-94CC-4612-9594-58ED2099612A.jpeg
1F0FEFE7-94CC-4612-9594-58ED2099612A.jpeg (49.1 KiB) Viewed 1525 times
5618FC0C-04F1-4472-8824-F1A5F0D2C021.jpeg
5618FC0C-04F1-4472-8824-F1A5F0D2C021.jpeg (436.73 KiB) Viewed 1525 times
DEF590BC-E943-421E-94D2-D9CA69A1D368.jpeg
DEF590BC-E943-421E-94D2-D9CA69A1D368.jpeg (3.79 MiB) Viewed 1525 times
CC836D47-38E9-44FF-9C76-8CE7F3659181.jpeg
CC836D47-38E9-44FF-9C76-8CE7F3659181.jpeg (3.7 MiB) Viewed 1525 times


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Re: ISS Solar Transit 2022.06.22

Post by MAURITS »

Nice to see Nick.


Regards,
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Re: ISS Solar Transit 2022.06.22

Post by ffellah »

Great first capture Nick ! Looking to see more from you.

Franco


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Re: ISS Solar Transit 2022.06.22

Post by rsfoto »

Well done


regards Rainer

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Re: ISS Solar Transit 2022.06.22

Post by rigel123 »

Great catch!


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Re: ISS Solar Transit 2022.06.22

Post by Montana »

Wow!! what a fabulous capture, well done :hamster: :hamster: :bow I know exactly the feeling you felt :hamster:

Alexandra


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Re: ISS Solar Transit 2022.06.22

Post by nicosolcy »

And the obligatory animated gif...
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ISS Transit Single Images GIF Small.gif
ISS Transit Single Images GIF Small.gif (4.72 MiB) Viewed 1489 times


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Re: ISS Solar Transit 2022.06.22

Post by arnedanielsen »

Great result Nick and thanks for sharing your learning-points as well!

Best regards,
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Re: ISS Solar Transit 2022.06.22

Post by marktownley »

That's pretty darn impressive! ISS transits are always a learning curve for me too.


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Re: ISS Solar Transit 2022.06.22

Post by Ibbo »

Neat.
They are fun to capture.


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Re: ISS Solar Transit 2022.06.22

Post by Carbon60 »

Nicely done. I’ve done this only once and I know exactly how you felt when you captured the transit.

Stu.


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Re: ISS Solar Transit 2022.06.22

Post by Lagonda »

I was using 0.449 ms to get clear ISS on solar surface when ISS was real close (521km away from me). I had 3m of focal length. I put the image here so you don't have to look it up. I hope you don't mind. Longer the focal length (bigger image of ISS) the shorter exposure you must have to grab it steady. I hope this will help you in future ISS imaging. :)
Image12_56_20_Sun_2021_08_07_f3952ar6cr by Alan Jadanic, on Flickr


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Re: ISS Solar Transit 2022.06.22

Post by nicosolcy »

Thanks All!

@ Lagonda: great shot! Will keep it in mind re exposure time. I will actually practice at various exposures and gain to find how much I can push gain before noise becomes a serious issue.


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Re: ISS Solar Transit 2022.06.22

Post by DeepSolar64 »

Determination pays off!! 😊 👍🏻


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Re: ISS Solar Transit 2022.06.22

Post by sywong2000 »

Amazing Capture!!


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