An aircraft with ICAO hex code 424CF7, callsign KELLEHER, has been flying sloooowly over Yuma Proving Grounds for more than 24 hours, up around 60,000 feet. (via @starsandrobots )pic.twitter.com/8l0UxTo504
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http://adsbexchange.com first picked it up at "2018-07-11 16:24:39", most recent plot is "2018-07-13 17:55:42", making it 49.5 hours. (data in HTML of https://flight-data.adsbexchange.com/map?icao=424CF7&date=2018-07-11 …)
I’ve been out here for several hours with a telescope and binoculars. I haven’t seen it. My best chance of getting anything are the 4K shots w/iPhone 8+ on a sturdy tripod. Easy to know where to point by calculating current alt/azimuth based on our known positionspic.twitter.com/OeZmvDV0Yd
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