Questions tagged [deorbit]

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1answer
1k views

Is SpaceX propulsively deorbiting a Starlink satellite already?

The plot below shows that most of the SpaceX Starlink satellites have moved from circa 450 km to circa 550 kilometers already, using their argon-based ion engines. A few, along with four unidentified ...
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0answers
44 views

Would it be possible to de-orbit a small object by throwing it with human strength? [duplicate]

If an astronaut went on a spacewalk (say from the ISS), tethered him/herself to a relatively massive object in orbit around the earth (say the ISS), and threw a small object in the direction opposite ...
3
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1answer
90 views

How do I calculate re-entry velocity when decaying from a circular orbit?

I am trying to find the velocity of an object during re-entry so that I can calculate the peak heat flux but I'm a bit stuck. I know how to find the velocity of the original, circular orbit (300km) ...
2
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0answers
76 views

Could a Soyuz-MS deorbit after a failure of its deorbit engine?

The scenario: A Soyuz-MS spacecraft is on-orbit and ready for its deorbit burn. The crew then discover that there is a fault in the propulsion system and the deorbit engine can't fire. The craft is ...
10
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2answers
205 views

Why did the MESSENGER probe get deorbited?

I have heard a bit about why interplanetary probes get deorbited, but that was about Jupiter and Saturn that have potentially life-friendly moons. But regarding Mercury, no life could exist there: the ...
3
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0answers
174 views

Where to stream online Tiangong 1 descent?

Are there going to be good free live streams of the descent and if so is there much to be seen anyway?
70
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4answers
28k views

Why does the ISS have to be destroyed?

ISS might be destroyed soon, de-orbiting for a controlled reentry into the Pacific Ocean. Why isn't simply pushed away from Earth to an outer stable orbit (not sure if it's possible) or even into an ...
5
votes
1answer
357 views

For a given amount of fuel, what is the best de-orbit profile for the ISS?

Reading this question, what is the best way to make sure most of ISS (or any other large object planned to be destroyed in the atmosphere) will burn and break into relatively small pieces in the ...
20
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1answer
7k views

Why would extra fuel be needed to de-orbit the ISS (if it comes to that)?

The BBC article The Astronaut Fighting to Save our Home in Space discusses “experienced astronaut, and astrophysicist Dr Michael Foale”'s exciting career aboard the Space Shuttle, Soyuz, ...
14
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2answers
769 views

Two week mark; has Mayak (Маяк) been spotted yet? Reflector deployed? Astronomy “ruined”?

Deborah Byrd's article Have you seen the Mayak satellite? explains Mayak with a bit of humor: A team of young Russians – led by Moscow State Mechanical Engineering University (MAMI) – managed to ...
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0answers
147 views

Would Mayak's large solar reflector have produced a stable attitude, or more likely start tumbling or rotating?

update: Answers to Two week mark; has Mayak (Маяк) been spotted yet? Reflector deployed? Astronomy “ruined”? indicate that the reflector did not deploy successfully (more at Mayak, a magnitude -10 (...
2
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1answer
406 views

Mayak, a magnitude -10 (minus ten) satellite; how is the large, delicate reflector expanded?

The July 14, 2017 NASA Spaceflight article Soyuz 2-1A launches with Kanopus-V-IK and over 70 satellites says: Mayak is a three-unit CubeSat which was built by Tvoii Sektor Kosmosa – or “Your Sector ...