7

You're right; these objects aren't lost. However, Space-Track doesn't actually track a lot of higher-orbiting objects. They just don't seem particularly interested in anything with a multi-day orbit; I don't know why. Of the four objects you mention, TESS and IBEX are tracked by the people operating those missions. I know of no public data for IBEX, ...


6

This has to do with ambiguities in the definitions used for certain terms, and software doing strange contortions to avoid breaking backwards compatibility. The USAF's family of Simplified General Perturbations propagators are based on mean element theories of orbital motion. However, there are multiple ways to define and compute mean motion, and ...


4

Answering almost a year later... This was a particularly hard launch for JSPOC to track. The systems, processes, databases, etc are not well set up for a launch with a hundred+ objects. It looks like a year later, 43822 still shows up as Object BS, and there are several other equally unidentified objects: Object X (43779), Object BE (43810), and others. ...


3

I find Ryan C's answer interesting... but I've never actually interpreted the documentation that way. It's difficult to be certain, since all official TLEs have had ephem type 0. But I (and others with whom I've discussed the matter) have assumed that ephem type 0 means "use SGP4 if you've got 6.4 or more revolutions/day; otherwise, use SDP4", ...


3

It seems to be considerably less. That is, they don't seem to have any sensors of their own -- they just wait for other people to report what they launched, and don't appear to seek regular updates. https://www.unoosa.org/oosa/en/ourwork/spacelaw/treaties/registration-convention.html 3235 (XXIX). Convention on Registration of Objects Launched into Outer ...


2

The answer is "no" because that is not its purpose. The role of the UN list is a place for the launching states to register those details they are obliged to do so by international treaty. From the first paragraph of Outer Space Objects Index: ... information provided to the United Nations in accordance with the Convention on Registration of ...


1

As I mentioned in a comment, without source at the time... SATCAT numbers 70000-99999 (70'000s, 80'000s, and 90'000s) are "analyst objects". This article from The Space Review indicates that these ranges had special uses, from the very beginning of the SATCAT: When the SATCAT was first setup, all of the information was being kept in one large database ...


1

I can't answer you fully why Celestrak is wrong, but the correct number is 44972. It seems like this was updated in the other source. New objects are around 45000 right now, they shouldn't be much larger than that.


1

@RussellBorogove's comment is fairly conclusive. ...I note that Celestrak was established in 1985, at which point Salyut 7 was up, but Skylab was not. The Archived TLE data page says 1980-2004, but there's a link to request earlier data. Skylab reentered the atmosphere before 1980 and Tiangong-1 and Tiangong-2 were both launched after 2004. And, as ...


Only top voted, non community-wiki answers of a minimum length are eligible