09/15/15 – Ephemeris – Not another hoax again: This one’s a supposed asteroid collision
Ephemeris for Tuesday, September 15th. The Sun will rise at 7:21. It’ll be up for 12 hours and 32 minutes, setting at 7:53. The Moon, 2 days past new, will set at 9:02 this evening.
There is a bogus prediction from the Internet that been circulating for a month or so. I missed it until a couple of days ago because I visit reputable astronomical web sites. I check near earth asteroids on spaceweather.com, and there is nothing known as of now that’s 22 meters of larger in size that will come within 2 million miles of the Earth this month. The dead giveaway that this prediction is bogus is the fact that the impact point is specific, near Puerto Rico, but the impact time is vague, between the 15th and 28th of September. An object orbiting the Sun, like the Earth travels at 18 and a half miles a second give or take, the asteroid at a comparable velocity, so the impact time would have to be known to the second. On top of the Earth’s position, it also rotates
Times are for the Traverse City/Interlochen area of Michigan. They may be different for your location.
Here is a link to NASA’s JPL on the subject.
NASA isn’t the only authority on asteroid orbits and positions. The Minor Planet Center is part of the International Astronomical Union (IAU), and currently operated under a grant from NASA is the clearinghouse for asteroid positions and orbits. Some discoveries and positions are supplied by amateur astronomers who aren’t beholden to any government, so there isn’t any conspiracy to keep the knowledge from the public.