Gigantic Jet Lightning: Measured
Taken by Frankie Lucena on July 24, 2017 @
Gemini Observatory in Hawaii
Click photo for larger image
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Camera Used: Canon Canon EOS DIGITAL REBEL XTi
Exposure Time: 30/1
Aperture: f/1.8
ISO: 1600
Date Taken: 2019:02:27 18:32:54
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Details:
I just recently realized that this Gigantic Jet is a good candidate to measure because it is a complete GJ and I have an image of the stormcell for the time that this GJ appeared, which was at approx 2:43am HST (12:43 UTC) on July 24, 2017. It was captured by the cloudcam at the Gemini Observatory atop Maunakea in Hawaii. The satellite image was retrieved by William Straka III and sent to me a few days after the event.
Using the Starry Night program I was able to find the altitude of the stars nearby but I had to estimate where the GJ appeared, so the calculations could be off by a few Kilometers. The X's seen in the photo mark the stars I used for the calculations. I used a Code that József Bór shared with me a few months ago.
The calculations seem to be accurate because Oscar van der Velde did point out that a trailing Jet, which is the bright red area, is usually located between 40 and 65 Km, and that is what I got with my calculations.
Credit: Gemini Observatory/AURA and Steven Cullen for discovering the event at their database.
Photographer's website:
http://https://www.flickr.com/photos/frankie57pr
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