Orbiter-Forum First Interstellar Asteroid Spotted
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 12-03-2017, 09:41 PM #61 Traveller Donator So now they can name the second one they find, "first loser."
 12-03-2017, 11:25 PM #62 RGClark Mathematician Perhaps someone could explain a confusion I have about the video by Tex in post #53. At about the 1:30 point in the video it looks like the asteroid is going backwards. Can someone explain that? Bob Clark
 12-03-2017, 11:40 PM #63 Linguofreak Orbinaut Quote: Originally Posted by RGClark  Perhaps someone could explain a confusion I have about the video by Tex in post #53. At about the 1:30 point in the video it looks like the asteroid is going backwards. Can someone explain that? Basically, the camera is moving from roughly behind the object to roughly in front of it, so the object is travelling backwards relative to the camera (but continues to advance along its heliocentric trajectory).
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 12-05-2017, 09:21 AM #64 RGClark Mathematician Quote: Originally Posted by Linguofreak  Basically, the camera is moving from roughly behind the object to roughly in front of it, so the object is travelling backwards relative to the camera (but continues to advance along its heliocentric trajectory). Thanks. However, the appearance of moving backwards is also in relation to the planets in the inner Solar System. I would like to see an interactive version where you could vary the angle and distance including zoom. I was puzzled by the fact it came so close to the Sun to be bent around to curve back its trajectory. This has the effect of increasing the time it spends in the Solar System. But you could argue it came close enough to the Earth to be discovered which makes it likelier to get close to the Sun. But it also seemed to get close to Jupiter at about the 1:06 point in the video. Jupiter has an 11 year period. It’s not likely it should get close to both Earth and Jupiter. However, because of the angle shown you can’t tell how far it is above the orbital plane during the Jupiter pass. I think it is actually high above the ecliptic during the Jupiter pass, judging from later viewpoints in the video. So it may be further away from Jupiter than it appears. This is another reason why an interactive video would be useful to answer this question. It also seems to get close to Mars at about the 1:40 point. But again this is hard to tell because of the angle. An interactive video would be helpful here again as well. Close passes by Jupiter, the Sun, Earth, and Mars. That can’t be right can it? Bob Clark Last edited by RGClark; 12-05-2017 at 01:05 PM.
 12-06-2017, 01:06 AM #65 boogabooga Bug Crusher Quote: Originally Posted by RGClark   An interactive video would be helpful here again as well. Or an Orbiter scenario. I'll work on it at some point.
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 12-07-2017, 06:28 AM #66 RGClark Mathematician Tony Dunn who runs the Orbitsimulator.com site, has come up with a pannable version of the Oumuamua trajectory: http://orbitsimulator.com/gravitySim.../oumuamua.html It shows the asteroid doesn't really get close to Jupiter or Mars. It does get close to Venus but that's not unexpected given the relative nearness of the orbits of Earth and Venus. Bob Clark
 12-07-2017, 07:48 AM #67 jedidia shoemaker without legs Quote: It does get close to Venus Protomolecule confirmed!
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 12-12-2017, 05:52 PM #68 Notebook Donator http://www.bbc.co.uk/news/science-environment-42329244 Quote: Interstellar asteroid checked for alien technology I feel safer already. N.
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 12-13-2017, 05:01 PM #69 Messierhunter Orbinaut Quote: Originally Posted by boogabooga  Or an Orbiter scenario. I'll work on it at some point. I just made the following scenario, using the state vectors from JPL HORIZONS. I was surprised to find the Y and Z axes seem to be flipped between Orbiter and JPL, but substituting one for the other resulted in orbital elements in the scenario editor that matched JPL's elements. Propagating forward seems to result in reasonable accuracy in the earth encounter distance. I made Oumuamua a default DG, feel free to replace with your object of choice. BEGIN_DESC END_DESC BEGIN_ENVIRONMENT System Sol Date MJD 51544.5000000000 END_ENVIRONMENT BEGIN_FOCUS Ship GL-01 END_FOCUS BEGIN_CAMERA TARGET GL-01 MODE Cockpit FOV 50.00 END_CAMERA BEGIN_HUD TYPE Surface END_HUD BEGIN_MFD Left TYPE Orbit PROJ Ship FRAME Ecliptic REF Earth END_MFD BEGIN_MFD Right TYPE Surface SPDMODE 1 END_MFD BEGIN_PANEL END_PANEL BEGIN_SHIPS GL-01:DeltaGlider STATUS Orbiting Sun RPOS 2065928170411.40 12934667920252.10 -8189560682147.30 RVEL -3771.150 -22332.173 14064.550 AROT -52.67 -56.91 90.32 AFCMODE 7 PRPLEVEL 0:0.553000 1:0.900000 NAVFREQ 0 0 0 0 XPDR 0 AAP 0:0 0:0 0:0 END END_SHIPS So, what would be the best tool to use to plan an intercept in orbiter? Can IMFD or TransX do the job, or would something else work better? Last edited by Messierhunter; 12-13-2017 at 05:08 PM.
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 12-16-2017, 10:32 PM #70 Messierhunter Orbinaut I was able to intercept it with the SLS and TransX, with a bit of jankiness.
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 12-19-2017, 09:56 AM #71 Notebook Donator Quote: Interstellar object may hold 'alien' water http://www.bbc.co.uk/news/science-environment-42397398 N.
 12-19-2017, 11:57 AM #72 Urwumpe Certain Super User And more so, scientists found out that despite its strange shape, it looks very much like objects in the Kuiper Belt, like Pluto, with a carbon-rich outer layer preventing ice from vaporizing in the sun.
 12-19-2017, 01:27 PM #73 Notebook Donator We should send a robot, drill that asteroid and bottle the water. People would pay a fortune for a Litre. Alien Bottled Water, big sales(till the side-effects start showing). N.
 12-19-2017, 01:28 PM #74 Urwumpe Certain Super User Quote: Originally Posted by Notebook  We should send a robot, drill that asteroid and bottle the water. People would pay a fortune for a Litre. Alien Bottled Water, big sales(till the side-effects start showing). N. Why not use the Coke Cola company way and sell water from the tap?
 02-11-2018, 10:15 AM #75 Notebook Donator Quote: The space interloper 'Oumuamua is spinning chaotically and will carry on doing so for more than a billion years. That is the conclusion of new Belfast research that has examined in detail the light bouncing off the cigar-shaped asteroid from outside our Solar System. "At some point or another it's been in a collision," says Dr Wes Fraser from Queen's University. His team's latest study is featured in Sunday's Sky At Night episode on the BBC and published in Nature Astronomy. http://www.bbc.co.uk/news/science-environment-43018706
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