Twitter | Pretraživanje | |
Michele Bannister 11. ruj
Orbits and when to get excited: a thread
Reply Retweet Označi sa "sviđa mi se"
Michele Bannister 11. ruj
Odgovor korisniku/ci @astrokiwi
There's a lot of excitement in the last day or so about a candidate near-Earth asteroid that has the temporary designation . This object is currently listed on the Possible Comet Confirmation Page
Reply Retweet Označi sa "sviđa mi se"
Michele Bannister 11. ruj
Odgovor korisniku/ci @MinorPlanetCtr
Entirely routinely and going on all the time, new moving things in the sky get found and added to the Near-Earth Object Confirmation Page of
Reply Retweet Označi sa "sviđa mi se"
Michele Bannister 11. ruj
Odgovor korisniku/ci @astrokiwi
If they turn out to be a little fuzzy dot, with a cometary coma, they are moved from that list to the Possible Comet Confirmation Page [I'm simplifying a little, but broad-brush]. This step requires More Observations
Reply Retweet Označi sa "sviđa mi se"
Michele Bannister 11. ruj
Odgovor korisniku/ci @MinorPlanetCtr
When the orbit is sufficiently well known, issues a Minor Planet Electronic Circular. This step requires a fair bit of knowledge about the object's orbit. Which comes from observations
Reply Retweet Označi sa "sviđa mi se"
Michele Bannister 11. ruj
Odgovor korisniku/ci @MinorPlanetCtr
Until the arc of an orbit is sufficiently long, there are really strong uncertainties in what its orbit can be. The ways this gets resolved? More observations
Reply Retweet Označi sa "sviđa mi se"
Michele Bannister
This is not the first object since 2017/1I, better known as ʻOumuamua, to show a hyperbolic orbit. Several short-arcs have flourished and slid slowly into the demise of straightforward parabolas. What it took? More observations
Reply Retweet Označi sa "sviđa mi se" More
Michele Bannister 11. ruj
Odgovor korisniku/ci @astrokiwi
Orbits are determined by mathematical fits to the astrometry that's sent to the MPC by observers all around the world. At the moment, there are some weird residuals in the fit to the orbit of this candidate object. You know what will resolve that? More observations
Reply Retweet Označi sa "sviđa mi se"
Michele Bannister 11. ruj
Odgovor korisniku/ci @MinorPlanetCtr
I too will be delighted to see a second observable interstellar object. And I'm absolutely sure are watching the incoming astrometry. For now? No MPEC yet. Sometimes, we just have to wait for the motion of the heavens. And make...more observations. /fin
Reply Retweet Označi sa "sviđa mi se"
Michele Bannister 11. ruj
Odgovor korisniku/ci @MinorPlanetCtr
Reply Retweet Označi sa "sviđa mi se"
Alexandra Witze 11. ruj
Odgovor korisniku/ci @astrokiwi
Demise of Parabolas sounds like a great band name
Reply Retweet Označi sa "sviđa mi se"
Jack Werner 11. ruj
Odgovor korisniku/ci @astrokiwi
So what you’re saying is don’t become excited yet?
Reply Retweet Označi sa "sviđa mi se"