Oumuamua - No discharge coma?

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Re: Oumuamua - No discharge coma?

Unread postby Metryq » Thu Jul 12, 2018 3:44 am

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Re: Oumuamua - No discharge coma?

Unread postby ConsciousNutshell » Mon Nov 05, 2018 9:42 am

Hi everyone,

How do they know it is an extra-solar system object if they has just discovered it? They say it has an eccentricity
e=1.1956±0.0006 but this could only be a modeling (a supposition) {https://arxiv.org/pdf/1810.11490.pdf}. Pre-entry velocity 26 km/s? More of the same. Why is it not possible it is an object of recent creation (might be a collision between two comets or a comet and an asteroid)? Anyway, A/2017 (Oumuamua) has just 100 meters and has showed no visible coma or outgassing. It's alleged perihelion was at 0.25 UA, so let's guess its distance to Earth was 0.7 UA (100 million km). {https://www.eso.org/public/archives/releases/sciencepapers/eso1737/eso1737a.pdf}
How the hell is it possible to see a dark object that DOES NOT EVEN REACH 1 MILLIMETER THICK at that distance?? It should be easier to see the penguins on Mars or the dragons in Venus. Not to say, it looks like somebody is trying to sell something or just manipulating the herd with the extraterrestrial origin idea {https://phys.org/news/2018-11-oumuamua-extraterrestrial-solar.html}.

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Re: Oumuamua - No discharge coma?

Unread postby D_Archer » Tue Nov 06, 2018 2:45 am

ConsciousNutshell wrote:Hi everyone,

How do they know it is an extra-solar system object if they has just discovered it? They say it has an eccentricity
e=1.1956±0.0006 but this could only be a modeling (a supposition) {https://arxiv.org/pdf/1810.11490.pdf}. Pre-entry velocity 26 km/s? More of the same. Why is it not possible it is an object of recent creation (might be a collision between two comets or a comet and an asteroid)? Anyway, A/2017 (Oumuamua) has just 100 meters and has showed no visible coma or outgassing. It's alleged perihelion was at 0.25 UA, so let's guess its distance to Earth was 0.7 UA (100 million km). {https://www.eso.org/public/archives/releases/sciencepapers/eso1737/eso1737a.pdf}
How the hell is it possible to see a dark object that DOES NOT EVEN REACH 1 MILLIMETER THICK at that distance?? It should be easier to see the penguins on Mars or the dragons in Venus. Not to say, it looks like somebody is trying to sell something or just manipulating the herd with the extraterrestrial origin idea {https://phys.org/news/2018-11-oumuamua-extraterrestrial-solar.html}.

Regards.


Because it reflects sunlight and our instruments see that light, yes these instruments are sensitive enough to pick up that light, the observation was made with the VLT.

The elongated shape is deduced because the object changes drastically in brightness in a period of 7 hours or so.

As for the extra stellar origin, they calculate backwards from the trajectory it has and the speed, this indicated an origin outside our solar system. Also it is very unlikely to be created in our solar system because of a collision of sorts, collisions rarely happen in space, a collision would also reduce speed and this thing is fast.

Regards,
Daniel
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