Justin commented that when he first spotted Ison she was glowing bright green "It's my first time seeing a comet and capturing it in motion. It's truly amazing! After I compiled the images and did a time-lapse movie for it, I'm totally in awe and speechless to see the comet moving that fast across the night sky," he said
As the video plays you can see the comet fading, this is due to the fact that the sun was starting to rise and brighting the sky causing Ison to fade from view. Eagle eyed viewers may also spot the galaxy NGC 3428 below and to the left of the two brightest stars on the left of the video.
Please be patient while the video loads, it's well worth the wait!
Normally you would not be able to see Ison moving whilst viewing the comet over such a short period of time, even though she is traveling at around 680,000 KPH but because of the very low field of view of Justins set up it allows us to see her in motion.
"The primary reason why the comet appears to be moving fast across the sky within 69 minutes is because of the smaller field of view, which makes a very deep space object looks big on the screen and move faster. This is evident if you were to use any planetarium softwares and try to zoom in closely into Comet ISON, you will see its moving faster and faster as the field of view becomes narrower.Justin Ng is a spectacular photographer with many awards under his belt, his work published by BBC's Sky at Night, National Geographic, ABC, EarthSky, CNN and the Guardian to name just a few! Justin does not limit himself to astrophotography, he actually specializes and is ranked one of the very best in the world at photographing landscapes, sports and especially weddings! So if your tying the knot and fancy the best photographer in the business check out his website here
I used a 20″ telescope and a specialized monochrome CCD camera to capture it and the field of view is 0.55 degrees. This is extremely narrow and the smaller the field of view, the faster an object will appear to move. Each exposure was only 90 seconds and so when you looked into the time-lapse in the slow motion part, each frame represent the distance covered by Comet ISON within 90 seconds. Which is logical because Comet ISON is traveling at a speed of 684,000kph (425,000mph).
Currently comet is not visible to naked eyes due to its magnitude of about +8.1 and the magnitude of the 2 brightest stars are at around +7, still beyond what naked eyes can see. However there have been reports that the comet is now visible for binoculars and medium-sized telescope.
The images used in the video is what you see in the RAW files. No other editing was done besides cropping the images to fit into 1920 resolution."