Talk:1740: Rosetta - Revision history

172.71.10.82 at 13:11, 2 November 2024

2024-11-02T13:11:22Z

108.162.237.242 at 11:51, 5 October 2016

2016-10-05T11:51:15Z

Matchups: Geeky details about effect of impact on orbit.

2016-10-03T11:31:15Z

Geeky details about effect of impact on orbit.

NotLock at 07:11, 3 October 2016

2016-10-03T07:11:05Z

NotLock at 07:10, 3 October 2016

2016-10-03T07:10:45Z

Hkmaly at 00:30, 2 October 2016

2016-10-02T00:30:13Z

Davidy22 at 23:48, 1 October 2016

2016-10-01T23:48:57Z

Miamiclay at 23:36, 1 October 2016

2016-10-01T23:36:29Z

108.162.246.110 at 10:25, 1 October 2016

2016-10-01T10:25:31Z

NotLock at 05:28, 1 October 2016

2016-10-01T05:28:58Z

← Older revision		Revision as of 13:11, 2 November 2024
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	The effect of impact may be small, but it will be multiplied with time. It might easily be measurable next orbit, and possibly be enough to "save Earth" after 10 orbits. If the 67P would actually be on trajectory colliding with Earth in 10 orbits, obviously. -- [[User:Hkmaly\|Hkmaly]] ([[User talk:Hkmaly\|talk]]) 00:30, 2 October 2016 (UTC)		The effect of impact may be small, but it will be multiplied with time. It might easily be measurable next orbit, and possibly be enough to "save Earth" after 10 orbits. If the 67P would actually be on trajectory colliding with Earth in 10 orbits, obviously. -- [[User:Hkmaly\|Hkmaly]] ([[User talk:Hkmaly\|talk]]) 00:30, 2 October 2016 (UTC)
	:Let's see. The impact was 2E-2m/sec and the masses are 3E6g and 1E13g, so delta V is 6E-9m/sec. Ten orbits is 2E9sec, so the change in position would be 12m. However, it might be in an orbit stabilized by Jupiter, or an in unstable orbit, in which case the change could be substantially different; impacts near aphelion or perihelion will also have nonproportional affects. I would guess that it is on the order of the uncertainty of the position and orbit.[[User:Matchups\|Matchups]] ([[User talk:Matchups\|talk]]) 11:31, 3 October 2016 (UTC)		:Let's see. The impact was 2E-2m/sec and the masses are 3E6g and 1E13g, so delta V is 6E-9m/sec. Ten orbits is 2E9sec, so the change in position would be 12m. However, it might be in an orbit stabilized by Jupiter, or an in unstable orbit, in which case the change could be substantially different; impacts near aphelion or perihelion will also have nonproportional affects. I would guess that it is on the order of the uncertainty of the position and orbit.[[User:Matchups\|Matchups]] ([[User talk:Matchups\|talk]]) 11:31, 3 October 2016 (UTC)
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		+	Reading this again in 2024 with the knowledge of Nasa's Dart mission, it appears cueball has been vindicated. [[Special:Contributions/172.71.10.82\|172.71.10.82]] 13:11, 2 November 2024 (UTC)

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 :: Thanks for the response! So the "extra data from Rosetta's sensors" were transmitted as Rosetta was descending, but before she landed. After she landed, then communications were shut off. Is that correct? [[User:NotLock|NotLock]] ([[User talk:NotLock|talk]]) 05:28, 1 October 2016 (UTC)
 :::I'm not sure whether comms were 'shut off,' or if they just knew that they'd get no more from the surface because of issues with solar power or line of sight once it was on the surface, but this was the plan IIRC.  [[User:Miamiclay|Miamiclay]] ([[User talk:Miamiclay|talk]]) 23:36, 1 October 2016 (UTC)
 Just watched an ESA clip, someone did actually go woooo.  https://youtu.be/GNoJz50YNJI?t=1m28s [[Special:Contributions/108.162.246.110|108.162.246.110]] 10:25, 1 October 2016 (UTC)

← Older revision		Revision as of 11:31, 3 October 2016
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	The effect of impact may be small, but it will be multiplied with time. It might easily be measurable next orbit, and possibly be enough to "save Earth" after 10 orbits. If the 67P would actually be on trajectory colliding with Earth in 10 orbits, obviously. -- [[User:Hkmaly\|Hkmaly]] ([[User talk:Hkmaly\|talk]]) 00:30, 2 October 2016 (UTC)		The effect of impact may be small, but it will be multiplied with time. It might easily be measurable next orbit, and possibly be enough to "save Earth" after 10 orbits. If the 67P would actually be on trajectory colliding with Earth in 10 orbits, obviously. -- [[User:Hkmaly\|Hkmaly]] ([[User talk:Hkmaly\|talk]]) 00:30, 2 October 2016 (UTC)
		+	:Let's see. The impact was 2E-2m/sec and the masses are 3E6g and 1E13g, so delta V is 6E-9m/sec. Ten orbits is 2E9sec, so the change in position would be 12m. However, it might be in an orbit stabilized by Jupiter, or an in unstable orbit, in which case the change could be substantially different; impacts near aphelion or perihelion will also have nonproportional affects. I would guess that it is on the order of the uncertainty of the position and orbit.[[User:Matchups\|Matchups]] ([[User talk:Matchups\|talk]]) 11:31, 3 October 2016 (UTC)

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 Just watched an ESA clip, someone did actually go woooo.  https://youtu.be/GNoJz50YNJI?t=1m28s [[Special:Contributions/108.162.246.110|108.162.246.110]] 10:25, 1 October 2016 (UTC)
-:You sure that was four 'o's?
+:You sure that was four 'o's? [[User:NotLock|NotLock]] ([[User talk:NotLock|talk]]) 07:11, 3 October 2016 (UTC)
 The effect of impact may be small, but it will be multiplied with time. It might easily be measurable next orbit, and possibly be enough to "save Earth" after 10 orbits. If the 67P would actually be on trajectory colliding with Earth in 10 orbits, obviously. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 00:30, 2 October 2016 (UTC)

← Older revision		Revision as of 07:10, 3 October 2016
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	Just watched an ESA clip, someone did actually go woooo. https://youtu.be/GNoJz50YNJI?t=1m28s [[Special:Contributions/108.162.246.110\|108.162.246.110]] 10:25, 1 October 2016 (UTC)		Just watched an ESA clip, someone did actually go woooo. https://youtu.be/GNoJz50YNJI?t=1m28s [[Special:Contributions/108.162.246.110\|108.162.246.110]] 10:25, 1 October 2016 (UTC)
		+	:You sure that was four 'o's?

	The effect of impact may be small, but it will be multiplied with time. It might easily be measurable next orbit, and possibly be enough to "save Earth" after 10 orbits. If the 67P would actually be on trajectory colliding with Earth in 10 orbits, obviously. -- [[User:Hkmaly\|Hkmaly]] ([[User talk:Hkmaly\|talk]]) 00:30, 2 October 2016 (UTC)		The effect of impact may be small, but it will be multiplied with time. It might easily be measurable next orbit, and possibly be enough to "save Earth" after 10 orbits. If the 67P would actually be on trajectory colliding with Earth in 10 orbits, obviously. -- [[User:Hkmaly\|Hkmaly]] ([[User talk:Hkmaly\|talk]]) 00:30, 2 October 2016 (UTC)

← Older revision		Revision as of 00:30, 2 October 2016
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	Just watched an ESA clip, someone did actually go woooo. https://youtu.be/GNoJz50YNJI?t=1m28s [[Special:Contributions/108.162.246.110\|108.162.246.110]] 10:25, 1 October 2016 (UTC)		Just watched an ESA clip, someone did actually go woooo. https://youtu.be/GNoJz50YNJI?t=1m28s [[Special:Contributions/108.162.246.110\|108.162.246.110]] 10:25, 1 October 2016 (UTC)
		+
		+	The effect of impact may be small, but it will be multiplied with time. It might easily be measurable next orbit, and possibly be enough to "save Earth" after 10 orbits. If the 67P would actually be on trajectory colliding with Earth in 10 orbits, obviously. -- [[User:Hkmaly\|Hkmaly]] ([[User talk:Hkmaly\|talk]]) 00:30, 2 October 2016 (UTC)

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 <!--Please sign your posts with ~~~~-->
 :Hairy's Woooo has four o's but Cueball's Wooo has only three o's. [[User:Rtanenbaum|Rtanenbaum]] ([[User talk:Rtanenbaum|talk]]) 14:41, 30 September 2016 (UTC)
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 :: Agreed, and edited. [[User:Beret Guy|Beret Guy]] ([[User talk:Beret Guy|talk]]) 20:54, 30 September 2016 (UTC)Beret Guy
-Hasn't the fact of simply being in orbit already caused a change in the trajectory?  Does impact make any difference?
+Hasn't the fact of simply being in orbit already caused a change in the trajectory?  Does impact make any difference? {{unsigned ip|108.162.216.111}}
 :Technically, yes, but the effect is so small it may as well not exist. [[Special:Contributions/108.162.218.239|108.162.218.239]] 01:56, 1 October 2016 (UTC)

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 :Technically, yes, but the effect is so small it may as well not exist. [[Special:Contributions/108.162.218.239|108.162.218.239]] 01:56, 1 October 2016 (UTC)
-:Yes, the gas(?) expelled from Rosetta in order to accelerate it toward the comet leaves the comet/Rosetta system[[User:NotLock|NotLock]] ([[User talk:NotLock|talk]]) 02:33, 1 October 2016 (UTC)
+:Yes, the gas(?) expelled from Rosetta in order to accelerate it toward the comet leaves the comet/Rosetta system [[User:NotLock|NotLock]] ([[User talk:NotLock|talk]]) 02:33, 1 October 2016 (UTC)
-Question: Why, if the purpose was to collect more data from the comet, was the signal lost, and why are the characters treating this as a good thing? Wouldn't we want a signal from Rosetta in order to transmit the data she gathers?[[User:NotLock|NotLock]] ([[User talk:NotLock|talk]]) 04:01, 1 October 2016 (UTC)
+Question: Why, if the purpose was to collect more data from the comet, was the signal lost, and why are the characters treating this as a good thing? Wouldn't we want a signal from Rosetta in order to transmit the data she gathers? [[User:NotLock|NotLock]] ([[User talk:NotLock|talk]]) 04:01, 1 October 2016 (UTC)
 :Rosetta has been in orbit around the comet since 2014, gathering data. It sent its lander ''Philae'' down in November 2014. This was always the intended ending for the orbiter itself.  [[User:Miamiclay|Miamiclay]] ([[User talk:Miamiclay|talk]]) 04:38, 1 October 2016 (UTC)
-:: Thanks for the response! So the "extra data from Rosetta's sensors" were transmitted as Rosetta was descending, but before she landed. After she landed, then communications were shut off. Is that correct?[[User:NotLock|NotLock]] ([[User talk:NotLock|talk]]) 05:28, 1 October 2016 (UTC)
+:: Thanks for the response! So the "extra data from Rosetta's sensors" were transmitted as Rosetta was descending, but before she landed. After she landed, then communications were shut off. Is that correct? [[User:NotLock|NotLock]] ([[User talk:NotLock|talk]]) 05:28, 1 October 2016 (UTC)