
And it baffled a whole lot of stargazers over at least 6 US states.
Do you know what it was?

The mysterious cloud was most probably created by a fuel dump from one of the rocket's booster stages.
Indeed, Japan successfully launched an H-2A rocket carrying the Telstar 12 Vantage communications satellite.
Must have been kind of scary to witness this huge and fast-moving ufo-cloud during at least half an hour at 5:40 AM.





Impressive cloud. Reminds me of others which have appeared lately, some remarkably angelic in appearance.
I read the article at the end of the H-2A Rocket link and in it found a map of the rockets trajectory, south through the Pacific and across South America at Peru.
Anybody other than these six states see anything? Somebody closer to the flight path like Mexico or Hawaii?