Questions tagged [tiangong-1]

For questions specifically about the Chinese Tiangong-1 space laboratory, which was launched in 2011.

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Why are Tiangong-1's Apogee and Perigee Graphs Wobbly?

The apogee and perigee graph of the Tiangong-1 space station, about to re-enter and break up Real Soon Now, is depicted in this graph (source: Wikipedia): Why are the graphs wobbly? Is it because the ...
Jens's user avatar
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13 votes
1 answer
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Detailed radar imaging of Tiangong-1; how do they do that?

@JamesPoulose's answer shows an advanced radar image of Tiangong-1, 270 km from the Earth's surface. The images was sourced from Space.com's How Was China's Tiangong-1 Space Station Crash Tracked So ...
uhoh's user avatar
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4 votes
2 answers
347 views

PSLV-C39/IRNSS-1H TLE accuracy

The TLEs accuracy for PSLV-C39/IRNSS-1H seems low when compared to that of the other LEO satellites (ISS, HST, Tiangong, Sfera 2, ...). Look, for example, at the following graph that shows the radius ...
Cristiano's user avatar
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5 votes
2 answers
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Did Tiangong-1 turn the engines on?

The following graph shows the Tiangong-1 radius vector at the perigee, semi-major axis and apogee (scaled to 6371 km just to show an approximate altitude) and its orbit eccentricity: I used the SGP4 ...
Cristiano's user avatar
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16 votes
2 answers
1k views

Do we have any idea when Tiangong-1 will deorbit?

In March 2016 China's Manned Space Engineering Office announced that all Tiangong-1 telemetry had failed leaving no ability to safely control the space station's decent. With what we know about the ...
Lumberjack's user avatar
2 votes
1 answer
466 views

Why Celestrak has Archived TLEs for most space stations from Russia and the US, but not Tiangong-1, Tiangong-2 or Skylab?

Thinking about this question, I wanted to look at historical data. Then I noticed that while Celestrak does provide Archived TLE data for Salyut 7, Mir, Kvant-1, Kvant-2, Kristallm, Spektr, Priroda, ...
uhoh's user avatar
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13 votes
2 answers
3k views

Is there real footage of Tiangong 1 reentry?

There are a couple of videos on the net showing some reentries and claiming them to be Tiangong 1. Is any of them authentic? I could not find any footage on the websites of the major space agencies (...
Everyday Astronaut's user avatar
1 vote
1 answer
454 views

Why does N2YO list Tiangong 1 as an ISS satellite? Is it just a mistake? yes/no?

The page http://www.n2yo.com/satellites/?c=2 which lists "ISS SATELLITES" includes Tiangong 1. Since it looks to me like all of the other objects are associated with ISS, and Tiangong 1 is a different ...
uhoh's user avatar
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