ISS Transit by bsimpson

ISS Transit

On October 5th, the International Space Station crossed directly between my location and the Sun. The silhouette of the space station is seen in this composite as it traveled in-front of the sun.
Each photo was 1/6th of a second apart. The transit lasted around 3 seconds total.
Hello Brian, I came across this browsing this evening. This is fascinating. How did you know the ISS was crossing overhead? Curious what size lens you used and precautions you used to protect your camera from shooting directly at the sun. Amazing shot. FAV!
November 6th, 2017  
@thewatersphotos Hi GaryW. I’m a member of RASC (Royal astronomical society of Canada) and a fellow local member sent out a message that a transit was happening that day. There are a few apps that can alert you to a transit, as well as websites such as
The composite is shot through my 8” Telescope (2000mm) with the appropriate camera adapter. You definitely 100% need a safety film any time you’re looking at the sun. I use Baader Astrosolar. I’ve gathered bits and pieces over the years to get to this point.
To get an estimate how “big” the sun would look with your lens/camera under safe conditions, shoot the moon! As evidenced by the solar Eclipse, the moon and sun are about the same apparent size.
The space station is quite small and moves very quickly during a transit.
November 6th, 2017  
@bsimpson Thanks for the education, Brian! Just an awesome shot!!
November 6th, 2017  
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