Really? It seems obvious to me that the kinds of people on HN would have interesting thoughts about this. There's often a commenter with first hand experience who gives great context that's hard to find elsewhere, e.g. somebody who knows about missiles or the government presence in the region or who is/was a commercial pilot.
Or on the other side, people find it interesting pilots regularly get optical errors.
I would expect this was just a cloud, but some people think it's a Learjet - https://twitter.com/MickWest/status/1364649745759621120 which is a bit complex as an explanation but possible. Also not what I would have thought a cruise missile looks like.
