russian meteor

has any entity attempted to extract a pre-encounter trajectory for the
russian meteorid. is it possibly a sputnik of the close encounter asteroid?

On Sat, 16 Feb 2013 08:57:02 -0800, lal_truckee
wrote:

has any entity attempted to extract a pre-encounter trajectory for the
russian meteorid. is it possibly a sputnik of the close encounter asteroid?

The orbital elements of the meteor have been determined with
reasonable accuracy. It was not space junk, and it was unrelated to
DA14 (the two had very different orbits).

lal_truckee:
has any entity attempted to extract a pre-encounter trajectory for the
russian meteorid. is it possibly a sputnik of the close encounter asteroid?

Chris L Peterson:
The orbital elements of the meteor have been determined with
reasonable accuracy. It was not space junk, and it was unrelated to
DA14 (the two had very different orbits).

The question was settled by a Russian Federal Assemblyman, who said
that the event was "an American weapons test."

--
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On Feb 16, 11:57*am, lal_truckee wrote:
has any entity attempted to extract a pre-encounter trajectory for the
russian meteorid. is it possibly a sputnik of the close encounter asteroid?

A satellite of a closely approaching asteroid could be moving in any
direction relative to the Earth. However, 2012 DA14 was several
hundred thousand kilometers away from the meteoroid, orders of
magnitude more than the typical distance of an asteroid moon.
Asteroid 2012 DA14 was very small, with a very low escape velocity.

On Tue, 19 Feb 2013 03:09:28 -0800 (PST), wrote:

A satellite of a closely approaching asteroid could be moving in any
direction relative to the Earth. However, 2012 DA14 was several
hundred thousand kilometers away from the meteoroid, orders of
magnitude more than the typical distance of an asteroid moon.
Asteroid 2012 DA14 was very small, with a very low escape velocity.

A fragment of DA14 could be very far away from it (the existence of a
fragment is much more likely than of a satellite). But it would still
be in the same orbit as DA14, and therefore couldn't have produced the
Russian fireball.

On Feb 19, 10:39*am, Chris L Peterson wrote:
On Tue, 19 Feb 2013 03:09:28 -0800 (PST), wrote:
A satellite of a closely approaching asteroid could be moving in any
direction relative to the Earth. *However, 2012 DA14 was several
hundred thousand kilometers away from the meteoroid, orders of
magnitude more than the typical distance of an asteroid moon.
Asteroid 2012 DA14 was very small, with a very low escape velocity.

A fragment of DA14 could be very far away from it (the existence of a
fragment is much more likely than of a satellite). But it would still
be in the same orbit as DA14, and therefore couldn't have produced the
Russian fireball.

The OP wasn't asking about a fragment with a similar/identical orbit,
but about a satellite which might have been in orbit around the
asteroid.

On Wednesday, February 20, 2013 3:11:38 AM UTC-8, wrote:
On Feb 19, 10:39*am, Chris L Peterson wrote:

On Tue, 19 Feb 2013 03:09:28 -0800 (PST), wrote:

A satellite of a closely approaching asteroid could be moving in any

direction relative to the Earth. *However, 2012 DA14 was several

hundred thousand kilometers away from the meteoroid, orders of

magnitude more than the typical distance of an asteroid moon.

Asteroid 2012 DA14 was very small, with a very low escape velocity.



A fragment of DA14 could be very far away from it (the existence of a

fragment is much more likely than of a satellite). But it would still

be in the same orbit as DA14, and therefore couldn't have produced the

Russian fireball.



The OP wasn't asking about a fragment with a similar/identical orbit,

but about a satellite which might have been in orbit around the

asteroid.

Same answer, whether is was a fragment or a satellite. It would still be in a similar orbit wrt the Sun & Earth, much as the moon has an orbit around the Sun that is similar to Earth's.

In sci.astro.amateur message
, Tue, 19 Feb 2013 08:39:33, Chris L Peterson
posted:

On Tue, 19 Feb 2013 03:09:28 -0800 (PST), wrote:

A satellite of a closely approaching asteroid could be moving in any
direction relative to the Earth. However, 2012 DA14 was several
hundred thousand kilometers away from the meteoroid, orders of
magnitude more than the typical distance of an asteroid moon.
Asteroid 2012 DA14 was very small, with a very low escape velocity.

A fragment of DA14 could be very far away from it (the existence of a
fragment is much more likely than of a satellite). But it would still
be in the same orbit as DA14, and therefore couldn't have produced the
Russian fireball.

DA14, and any gravitationally-unbound fragments, seem likely to have
made a number of reasonably close and therefore deflecting passes of
Earth and Moon in the past. In almost all of those, the deflections of
fragments will have been significantly different from that of DA14, and
the differences will have been much amplified on successive passes.

The Russian object could have been a fragment of almost anything,
including (but not especially) DA14. But it could not have been a
recent fragment of DA14.

--
(c) John Stockton, nr London, UK. E-mail, see Home Page. Turnpike v6.05.
Website http://www.merlyn.demon.co.uk/ - w. FAQish topics, links, acronyms
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Dates - miscdate.htm estrdate.htm js-dates.htm pas-time.htm critdate.htm etc.

:
The OP wasn't asking about a fragment with a similar/identical orbit,
but about a satellite which might have been in orbit around the
asteroid.

palsing:
Same answer, whether is was a fragment or a satellite. It would still be in a
similar orbit wrt the Sun & Earth, much as the moon has an orbit around the Sun that is similar to Earth's.

Do you seriously expect the Snells and the Oriels and other
intellectual midgets to grasp the concept that such a satellite would
have an "orbit within and orbit" and that it would be unable to make a
u-turn in space if it escaped its parent body?

--
I agree with almost everything that you have said and almost everything that
you will say in your entire life.

usenet *at* davidillig dawt cawm

On Wed, 20 Feb 2013 22:43:58 +0000, Dr J R Stockton
wrote:

The Russian object could have been a fragment of almost anything,
including (but not especially) DA14. But it could not have been a
recent fragment of DA14.

That is the key point, since without it being a very recent fragment,
it would be wildly unlikely that both the fragment and the parent
would arrive here at the same time. As unlikely as any other pair of
objects (which also shows the error of assigning odds to
coincidences).