ISS Lunar Transit
Taken by Szabolcs Nagy on February 10, 2019 @ London
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Brief summary

An opportunity popped up in Calsky, a possible chance for a lunar transit. It was predicted roughly 30mins before sunset, so I did not have too high expectations about the final result. Moon was at 41° above horizon at the time of transit.

Calsky only show the centreline, ISS Detector app show the edges too. Edges I mean when ISS passes close to the edge of lunar disk. This way I could roughly find the place from where ISS wasnt only in front of the lunar disk, instead a bit of both. But I was only hoping for a good outcome, now looking back it couldnt be any better than this!

I had doubts to even have clear sky, clouds were heading toward east leaving nice clear skies behind - but the question was if it clears up in time or not.
It did at the right time, so I could capture the transit which I only saw from the corner of my eyes whilst :) When I watched the recorded video I was jolly happy 😄

Imaging and processing

I took a high frame rate video (around 120fps) with the equipment below. Once I finished recording, I ran the video through a software called PIPP to break it down into individual frames. I improved the frames of the transit in Lightroom. After engancing details I had to crop them to this smaller size so that ISS remains always in the centre of all frames. Then stringed them back into an animation in Photoshop. This is not the real speed of the transit, it happened in a blink of an eye!

10/02/2019 16:43
London, UK

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Wow! That is so cool! What an interesting perspective it gives. Thank you for posting!
Posted by AstroPilot 2019-02-17 09:35:57
AstroPilot thanks! The 1Mb limit sadly puts me into very restricted territory in term of quality, the original animation has slightly better resolution ;)
Posted by wasabee007 2019-02-17 11:23:17
Posted by kb9uwu 2019-02-17 15:47:21
I think moving images in astronomy belong to the future. This is a very good example of where the journey is going. thank you for the inspiration! MJ
Posted by jeanc567 2019-02-18 01:35:29
Really excellent- the idea of centering frames on the ISS gives this a completely different perspective. Great Work!
Posted by NCarlson9721 2019-02-18 12:23:56
WOW! WOW! WOW! I would love to image the ISS in Sunlight over the Moon like you did. Centering the ISS in this animation was a good idea. :-)
Posted by Philip Smith 2019-02-23 16:17:09
Thanks for all your comment, much appreciated!
Ill be honest it wasnt my idea, I saw it in Instagram with an unilluminated ISS transit and that gave me the idea. But I at that time I didnt have the sufficient ingredient for a goof animation.
And even when I had, it took me a few days when this idea popped in my mind. When I first started the animation I almost fell off of my chair :D I have never ever seen anything like it before and it totally changes the perspective of how we see the ISS.
Many thanks again and will keep up the work.

In the meantime please visit my website ;)
Posted by wasabee007 2019-03-16 05:38:59
86 thumbs up
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