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originally posted by: butcherguy
originally posted by: wildespace
originally posted by: butcherguy
a reply to: Hellmutt
Apogee and perigee.
The altitude varies as the orbit is elliptical.
The station is not going reenter for several more hours from what have been seeing.
That's just the projected path. It might well have reentered by now. We just have to wait for confirmation and video footage from witnesses.
I am not concerned with 'projected path'.
I am paying attention to altitude.
The US air force has confirmed the reentry of the Tiangong-1 spacecraft at about 02:16 CEST this morning over the southern Pacific Ocean. The location of the reentry was, by chance, not too far from the so-called South Pacific Ocean Unpopulated Area. The SPOUA has long been used by many space agencies including ESA, to dispose of end-of-life spacecraft through controlled reentries.
The air force wrote:
The JFSCC used the Space Surveillance Network sensors and their orbital analysis system to confirm Tiangong-1’s reentry, and to refine its prediction and ultimately provide more fidelity as the reentry time approached. This information is publicly-available on USSTRATCOM’s website www.Space-Track.org. The JFSCC also confirmed reentry through coordination with counterparts in Australia, Canada, France, Germany, Italy, Japan, South Korea, and the United Kingdom.
Point Nemo is defined as the place furthest from land in the world. And as it happens, the Volvo Ocean Race fleet will pass quite close to this isolated spot it this weekend.
Point Nemo is located over 1,600 miles (1,400 nautical miles) from the Pitcairn islands to the north, the Easter Islands to the north-east and Antarctica to the south.
On this Southern Ocean leg, the fleet is actually passing to the south of the theoretical position of Point Nemo, named after Captain Nemo from the Jules Verne story.
originally posted by: Kandinsky
a reply to: wildespace
The narrative has caught me by surprise. I took it for granted that various agencies and groups would be able to predict the path of Tiangong-1 with high accuracy. The fact that they've narrowed it down to 'maybe' half the Pacific Ocean (give or take half a day) has been an eye-opener.