Orbits and when to get excited: a thread
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There's a lot of excitement in the last day or so about a candidate near-Earth asteroid that has the temporary designation
#gb00234. This object is currently listed on the Possible Comet Confirmation Page https://minorplanetcenter.net/iau/NEO/pccp_tabular.html …1 reply 11 proslijeđenih tweetova 42 korisnika označavaju da im se sviđaPrikaži ovu nit -
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
@MinorPlanetCtr https://minorplanetcenter.net/iau/NEO/toconfirm_tabular.html …1 reply 2 proslijeđena tweeta 17 korisnika označava da im se sviđaPrikaži ovu nit -
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
1 reply 2 proslijeđena tweeta 20 korisnika označava da im se sviđaPrikaži ovu nit -
When the orbit is sufficiently well known,
@MinorPlanetCtr issues a Minor Planet Electronic Circular. https://minorplanetcenter.net/mpec/RecentMPECs.html … This step requires a fair bit of knowledge about the object's orbit. Which comes from observations1 reply 2 proslijeđena tweeta 18 korisnika označava da im se sviđaPrikaži ovu nit -
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
1 reply 3 proslijeđena tweeta 17 korisnika označava da im se sviđaPrikaži ovu nit -
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
6 replies 4 proslijeđena tweeta 29 korisnika označava da im se sviđaPrikaži ovu nit -
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
2 proslijeđena tweeta 27 korisnika označava da im se sviđaPrikaži ovu nit -
I too will be delighted to see a second observable interstellar object. And I'm absolutely sure
@MinorPlanetCtr 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. /fin6 replies 3 proslijeđena tweeta 43 korisnika označavaju da im se sviđaPrikaži ovu nit -
8 replies 25 proslijeđenih tweetova 87 korisnika označava da im se sviđaPrikaži ovu nit
So what are the elements? ( not shown on mpec screenshot)
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https://minorplanetcenter.net/mpec/K19/K19RA6.html … At the bottom of that page. Notably: e 3.0794827
0 replies 0 proslijeđenih tweetova 1 korisnik označava da mu se sviđaHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi
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