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IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!

 
Anonymous Coward
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01/28/2020 04:05 PM
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
When will the expected fly-by event occur, in Eastern Standard Time?

:popcorn6:
 Quoting: Grief


6:39:35 Eastern Time (23:39:35 UT).
[link to twitter.com (secure)]
 Quoting: Astroshill


uhoh
8503
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01/28/2020 05:11 PM
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
(...) At 14 km/s there is no brushing. (...)
 Quoting: Astroshill


E=(m*v*v)/2
85*14700*14700/2= 9183825000 = 9.2 GJ
interaction time … 14.7km/s = 14.7 m / ms … something about 0.2 ms

Specific gigajoule to ton of TNT Conversion Results
Amount : 9.2 gigajoules (GJ)
Equals : 2.20 tons of TNT (tn)
Fraction : 2 1/5 tons of TNT (tn)

Not so sure ... plasma ball or debris, we will see,
hopefully nothing.

:-)
Grief

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01/28/2020 09:52 PM
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
So, about an hour and a half before sunrise, on a mostly quiet night, if i happen to look up, the sky might light up for a little bit? Or not.
AstroshillModerator  (OP)
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01/28/2020 10:18 PM

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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
(...) At 14 km/s there is no brushing. (...)
 Quoting: Astroshill


E=(m*v*v)/2
85*14700*14700/2= 9183825000 = 9.2 GJ
interaction time … 14.7km/s = 14.7 m / ms … something about 0.2 ms

Specific gigajoule to ton of TNT Conversion Results
Amount : 9.2 gigajoules (GJ)
Equals : 2.20 tons of TNT (tn)
Fraction : 2 1/5 tons of TNT (tn)

Not so sure ... plasma ball or debris, we will see,
hopefully nothing.

:-)
 Quoting: 8503 73850363

Thanks. 9.2 gigajoules should be enough to produce a visible flash I would think. Assuming we get a collision of course.

Last Edited by Astromut on 01/28/2020 10:19 PM
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AstroshillModerator  (OP)
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01/28/2020 10:19 PM

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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
So, about an hour and a half before sunrise, on a mostly quiet night, if i happen to look up, the sky might light up for a little bit? Or not.
 Quoting: Grief


No. It wouldn't be anywhere near Italy. It will be directly over Pittsburgh.

Last Edited by Astromut on 01/28/2020 10:19 PM
astrobanner2
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
NASA, the Netherlands Agency for Aerosace Programmes, and the U.K.'s Science and Engineering Research Council launched the Infrared Astronomical Satellite (IRAS) from Vandenberg Air Force Base in California on January 25, 1983. IRAS carried three scientific instruments: a survey array, a low resolution spectrometer and a chopped photometric channel.

[link to www.popularmechanics.com (secure)]

PM always has good info
AxX

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01/29/2020 09:03 AM

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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
Today's the day!
clueless-ahhh3
Energy flows where focus goes.

[25/77/22]

Rev 3:9 <-- Wonder who these guys are?

“The future’s uncertain and The End is always near!” - Jim Morrison, 1970
Anonymous Coward
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01/29/2020 09:14 AM
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
any update ?
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01/29/2020 09:43 AM

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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
any update ?
 Quoting: Goofy for God


I tested my equipment last night and found the camera I planned to use is failing. It's been my tracking and planetary camera for about 10 years now, and it's finally giving up the ghost. I'm going to try to replace it with a used unit that was having problems with its automatic gain control and just hope that it doesn't give me trouble tonight. If that fails I might be able to borrow another camera off a friend.
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01/29/2020 10:53 AM
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
Ready.popcorn
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01/29/2020 11:46 AM

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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
Odds have increased to 1 in 20!!!!!!!
[link to twitter.com (secure)]
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01/29/2020 12:10 PM
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
The psyops of gravity movie comes to mind.
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01/29/2020 12:17 PM
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
(...) At 14 km/s there is no brushing. (...)
 Quoting: Astroshill


E=(m*v*v)/2
85*14700*14700/2= 9183825000 = 9.2 GJ
interaction time … 14.7km/s = 14.7 m / ms … something about 0.2 ms

Specific gigajoule to ton of TNT Conversion Results
Amount : 9.2 gigajoules (GJ)
Equals : 2.20 tons of TNT (tn)
Fraction : 2 1/5 tons of TNT (tn)

Not so sure ... plasma ball or debris, we will see,
hopefully nothing.

:-)
 Quoting: 8503 73850363



The energy released from a perfect collision will be a LOT higher than that.

2.2 tons of TNT would not make an intact ton of material move even 500 mph, the satellites are going more than 30,000 and energy does not scale linear with speed.

TNT has no where near the energy yield per ton that hydrogen has, the blast from TNT is only significant because of how fast the energy is released. It might only match a few pounds of gasoline.

Put 10 pounds of gasoline in a bulldozer and see how much you can move with it. It will be a lot more than the TNT would do.
Anonymous Coward
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01/29/2020 01:01 PM
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
[link to twitter.com (secure)]
IRAS, a wide field infrared telescope launched in 1983, is at risk of colliding with an even older satellite, the Gravity Gradient Stabilization Experiment 4 which was launched in 1967 ( [link to nssdc.gsfc.nasa.gov (secure)] ). Both satellites are out of commission so neither can maneuver out of the way. Both are sizable satellites traveling at high velocities relative to each other (they're coming at each other head-on), so a collision would produce a huge amount of debris. The risk of collision currently stands at about 1% with a predicted miss distance of just a few meters.

The satellites will actually be overhead and illuminated during an early evening pass for me at the moment of the predicted collision. I will try to track and film it if I can, but the weather forecast is not favorable at that time. Even if the collision does not happen, I should see two satellites passing right by each other. If a collision does happen, it would amazing to capture it on video. It's a low risk, but if it happens it will shower debris along the orbit. These are both high inclination satellites, so the debris field would intersect virtually all low orbits at some point.
 Quoting: Astroshill



Thread: Comcast down in most of U S
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01/29/2020 01:07 PM
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
any update ?
 Quoting: Goofy for God


I tested my equipment last night and found the camera I planned to use is failing. It's been my tracking and planetary camera for about 10 years now, and it's finally giving up the ghost. I'm going to try to replace it with a used unit that was having problems with its automatic gain control and just hope that it doesn't give me trouble tonight. If that fails I might be able to borrow another camera off a friend.
 Quoting: Astroshill


grouphug
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
Did I get time wrong I thought 630 am today? thanks
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
Did I get time wrong I thought 630 am today? thanks
 Quoting: Goofy for God


Pm
astrobanner2
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
ONE THING IS FOR SURE...THE SATS. OR THIS THREAD WILL 'CARSH'..!UH
AxX

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01/29/2020 01:34 PM

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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
Did I get time wrong I thought 630 am today? thanks
 Quoting: Goofy for God


Pm
 Quoting: Astroshill


FWIW, I'm excited to see another Astromutt telescope video.

Understood the event is around 6:30pm -- Do you think it'll be about 3 hours before you get in and get the video uploaded?
Energy flows where focus goes.

[25/77/22]

Rev 3:9 <-- Wonder who these guys are?

“The future’s uncertain and The End is always near!” - Jim Morrison, 1970
3683
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01/29/2020 01:38 PM
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
 Quoting: 8503 73850363


Almost no access to GLP from my IP from Poland.
(distorted content and "read only")
:-/
Perchance

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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
This web site provides predictions of satellite tracks. If I've got the link setup correctly, it will display the location of the two satellites of interest.

[link to www.n2yo.com (secure)]
Anonymous Coward
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
Odds have increased to 1 in 20!!!!!!!
[link to twitter.com (secure)]
 Quoting: Astroshill


Holy CRAP!!!!

I FUCKING LOVE 2020!!!!!

fuckyeah5
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01/29/2020 02:23 PM
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
[link to twitter.com (secure)]
IRAS, a wide field infrared telescope launched in 1983, is at risk of colliding with an even older satellite, the Gravity Gradient Stabilization Experiment 4 which was launched in 1967 ( [link to nssdc.gsfc.nasa.gov (secure)] ). Both satellites are out of commission so neither can maneuver out of the way. Both are sizable satellites traveling at high velocities relative to each other (they're coming at each other head-on), so a collision would produce a huge amount of debris. The risk of collision currently stands at about 1% with a predicted miss distance of just a few meters.

The satellites will actually be overhead and illuminated during an early evening pass for me at the moment of the predicted collision. I will try to track and film it if I can, but the weather forecast is not favorable at that time. Even if the collision does not happen, I should see two satellites passing right by each other. If a collision does happen, it would amazing to capture it on video. It's a low risk, but if it happens it will shower debris along the orbit. These are both high inclination satellites, so the debris field would intersect virtually all low orbits at some point.
 Quoting: Astroshill


And then?
Anonymous Coward
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01/29/2020 02:25 PM
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
Did I get time wrong I thought 630 am today? thanks
 Quoting: Goofy for God


Pm
 Quoting: Astroshill


FWIW, I'm excited to see another Astromutt telescope video.

Understood the event is around 6:30pm -- Do you think it'll be about 3 hours before you get in and get the video uploaded?
 Quoting: AxX


Two Old Satellites Dangerously Close to Colliding Over Pittsburgh

[link to weather.com (secure)]

thanks some news yesterday put am
BBQ BOY™

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01/29/2020 02:28 PM
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
When will the expected fly-by event occur, in Eastern Standard Time?

popcorn6
 Quoting: Grief


6:39:35 Eastern Time (23:39:35 UT).
[link to twitter.com (secure)]
 Quoting: Astroshill


thumbupok
"Never underestimate the pain of a person. In all honesty, everyone is struggling. Just some people are better at hiding it than others."

Everyone has to work out their own salvation.

Life can only be understood backwards, but it must be lived forwards.
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01/29/2020 02:29 PM

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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
Did I get time wrong I thought 630 am today? thanks
 Quoting: Goofy for God


Pm
 Quoting: Astroshill


FWIW, I'm excited to see another Astromutt telescope video.

Understood the event is around 6:30pm -- Do you think it'll be about 3 hours before you get in and get the video uploaded?
 Quoting: AxX


Two Old Satellites Dangerously Close to Colliding Over Pittsburgh

[link to weather.com (secure)]

thanks some news yesterday put am
 Quoting: Goofy for God


So I guess I'm confused, if this is occurring over the Pittsburgh metro area wouldn't it only be visible say within a 500 mile radius of that area?

hmmm
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01/29/2020 02:30 PM

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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
Did I get time wrong I thought 630 am today? thanks
 Quoting: Goofy for God


Pm
 Quoting: Astroshill


FWIW, I'm excited to see another Astromutt telescope video.

Understood the event is around 6:30pm -- Do you think it'll be about 3 hours before you get in and get the video uploaded?
 Quoting: AxX

Yeah, at least. Assuming anything even happens, of course. Oh and then there's the weather. I'm driving 2 hours to give myself the best chance of clear skies, but it's still a long shot.
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
...


Pm
 Quoting: Astroshill


FWIW, I'm excited to see another Astromutt telescope video.

Understood the event is around 6:30pm -- Do you think it'll be about 3 hours before you get in and get the video uploaded?
 Quoting: AxX


Two Old Satellites Dangerously Close to Colliding Over Pittsburgh

[link to weather.com (secure)]

thanks some news yesterday put am
 Quoting: Goofy for God


So I guess I'm confused, if this is occurring over the Pittsburgh metro area wouldn't it only be visible say within a 500 mile radius of that area?

hmmm
 Quoting: G3


No. These satellites are about 900 km above earth.
astrobanner2
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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
Did I get time wrong I thought 630 am today? thanks
 Quoting: Goofy for God


Pm
 Quoting: Astroshill


FWIW, I'm excited to see another Astromutt telescope video.

Understood the event is around 6:30pm -- Do you think it'll be about 3 hours before you get in and get the video uploaded?
 Quoting: AxX


Two Old Satellites Dangerously Close to Colliding Over Pittsburgh

[link to weather.com (secure)]

thanks some news yesterday put am
 Quoting: Goofy for God


You heard it here first.
astrobanner2
G3

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01/29/2020 02:32 PM

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Re: IRAS Telescope at risk of colliding with another satellite TONIGHT! 1 in 20 Chance!
...


FWIW, I'm excited to see another Astromutt telescope video.

Understood the event is around 6:30pm -- Do you think it'll be about 3 hours before you get in and get the video uploaded?
 Quoting: AxX


Two Old Satellites Dangerously Close to Colliding Over Pittsburgh

[link to weather.com (secure)]

thanks some news yesterday put am
 Quoting: Goofy for God


So I guess I'm confused, if this is occurring over the Pittsburgh metro area wouldn't it only be visible say within a 500 mile radius of that area?

hmmm
 Quoting: G3


No. These satellites are about 900 km above earth.
 Quoting: Astroshill


Ok, thanks Astro

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