Subaru, Mauer, University Of Hawaii discussed on SpaceTime with Stuart Gary
The side facing the sun is getting heat up but it turns out that the hottest part of the surface is not the part directly under the sun at because these things turning so the hottest part the surface a is a bit a bit further around it corresponds to about two o'clock in the afternoon If you think of noon being weather sounds directly overhead. The things turned a couple of hours for a bit further. Not couple of hours on the asteroid. Because that's a different rotations. Pay that kind of if you. I'm not making very clear but it means the hottest part is not facing the sun. It's actually facing slightly backwards. And what that means is that part of the asteroid is a is releasing rather more info infrared radiation. The of it. So it's non-thermal sorry non uniform thermal radiation in red and that radiation basically exerts a a thrust. Slow very slight thrust on the asteroid. What it means is that the the thing is essentially speeding up. The the that's done. This is from the university of hawaii ashley by scientists there and one of the day fallen who's actually one of the institute for astronomy scientists. Who works on this. He says he says the we've known for some time that an impact with is not possible during the twenty twenty nine close approach the new observations. We've obtained a with the subaru telescope and forgot to mention. Subaru is the japanese eight meter telescope amount of kea in hawaii. First class instrument. I have a subaru alone. Mauer do there you go. I used to have a super salad fiber car. You know what subaru means. Now is the japanese word for the plot. And that's why you're subaru car stars all right. I wondered that you go. Let me just go back to the stolen. Who says the new observations. We obtained with the subaru telescope earlier. This year were good enough to reveal the kofsky acceleration of office and they show that the asteroid is drifting away from purely gravitational orbits by about one hundred seventy meters per year which is enough to keep the twenty sixty eight impact scenario implying. Boy so what he's saying is i mean. That's an astonishingly small amount. What a tiny. Acceleration changes by hundred and seventeen meters per year When you think of the distance an asteroid will travel in a year. but anyway. that's that's a the bottom line so what it means is we are not now certain. The twenty six eighty won't hit there so that will naturally what it will do is prompt further observations and men. I in fact it may well be that within a decade. perhaps we will know one way or the other. Whether it's there's any possibility hitting twenty sixty just because it be observed to death Between now and certainly well before twenty six to think so mike. Sorry go to things. Come to mind Obviously we are very much aware of nearest objects. We're looking for them all the time and you talked about potential intervention. You would think by twenty sixty eight. We'd have a wii of giving this thing nudge. So that it misses us. I would be contract of.