I’ve been waiting patiently. Today, three parts of a challenge finally came together. The sky was clear. I had the correct video equipment. And, the International Space Station crossed the face of the Sun as seen from my location. I received an email notice from CalSky this morning about this event. The track of the centerline was directly over our communities. I had to be ready in about an hour if I was to record video of the event.
I put the solar filter over the lens of my camera and put it on the tripod. I stepped outside to test the video settings. A test video of the Sun turned out as I hoped. I went inside and set a timer. The transit across the Sun was to occur moments after 1:03 local time. I figured to record from 1:02 until 1:04. The transit would show a silhouette of the ISS for only 0.6 seconds since it is going so fast at 5 mile/sec. I used my cell phone to accurately keep track of time. It was within a second of the national atomic clock.
Here is the result. The video is slowed down to half speed. Transit occurs about 6 seconds into it. You can slow it down even more with the gear tool on the video panel.
I was thrilled with the result. This isn’t the first time I’ve recorded a transit. Others are here and here. But, this is by far the best quality. I am still waiting for an opportunity to record an ISS transit of the Moon.
Here is a sequence of superimposed screen shots from the video showing a more detailed look at ISS. Two large solar array panels are quite visible. Total transit time was 0.6 sec. Each position of ISS is about 0.1 sec apart. Notice a few small sunspots left of center and to the far right limb. The faint concentric rings are imaging artifacts and not real. North is to the top of the frame.