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Originally posted by Lemon.Fresh
It's Planet X
Originally posted by Box of Rain
Originally posted by SeekerofTruth101
Dashing through the constellations of Orion, Taurus, and Pisces rules out the object of being terresterial origin such as boosters from rockets or space metallic junk, if indeed it does not show any characteristic of being meteorites or chunk of rock.
The object is only "dashing through" those constellations as seen from Earth -- as the background constellations.
All artificial satellites seen from Earth could be said to be "dashing through" one constellation or another. I saw the ISS fly though Orion once -- and what I mean is that the stars in Orion were the background stars that the ISS was flying against.
Originally posted by Larryman
Oh, that's great. A 60-foot asteroid, passing Earth within 3-tenths of the distance to the Moon, made of iron, and with the Earth's magnetic field moving toward Russia at increasing speed. Can't see anything un-predictable about that. It's not like iron is attracted to a magentic field, or such.
Originally posted by Bunker or Bust
reply to post by Box of Rain
What time will I pick it up in the UK, I have a fairly decent scope.
2nd Line
Propelled into space - According to urban legend, a manhole cover was accidentally launched from its shaft during an underground nuclear test in the 1950s, at great enough speed to achieve escape velocity. The myth is based on a real incident during the Operation Plumbbob nuclear tests, where a heavy (900 kg) steel plate cap was blasted off the test shaft at an unknown velocity, and appears as a blur on a single frame of film of the test; it was never recovered. A calculation before the event gave a predicted speed of six times Earth escape velocity, but the calculation is unlikely to have been accurate and they did not believe that it would leave the Earth in reality. After the event, Dr. Robert R. Brownlee described the best estimate of the cover's speed from the photographic evidence as "going like a bat!!"
Originally posted by RestingInPieces
Originally posted by Box of Rain
Originally posted by SeekerofTruth101
Dashing through the constellations of Orion, Taurus, and Pisces rules out the object of being terresterial origin such as boosters from rockets or space metallic junk, if indeed it does not show any characteristic of being meteorites or chunk of rock.
The object is only "dashing through" those constellations as seen from Earth -- as the background constellations.
All artificial satellites seen from Earth could be said to be "dashing through" one constellation or another. I saw the ISS fly though Orion once -- and what I mean is that the stars in Orion were the background stars that the ISS was flying against.
That's only when you are tracking it with your eyes, not instruments that can give a fairly accurate distance.
HORIZONS System
The JPL HORIZONS on-line solar system data and ephemeris computation service provides access to key solar system data and flexible production of highly accurate ephemerides for solar system objects ( 478165 asteroids, 3015 comets, 170 planetary satellites, 8 planets, the Sun, L1, L2, select spacecraft, and system barycenters ). HORIZONS is provided by the Solar System Dynamics Group of the Jet Propulsion Laboratory.
Comet AND asteroid index search:
NAME = AL30;
Matching small-bodies:
Record # Epoch-yr Primary Desig >MATCH NAME<
-------- -------- ------------- -------------------------
24499 2001 AL30 2001 AL30
80477 2000 AL30 2000 AL30
126194 2002 AL30 2002 AL30
143287 2003 AL30 2003 AL30
213055 1999 AL30 1999 AL30
483549 2005 AL30 2005 AL30
557687 2007 AL30 2007 AL30
588604 2008 AL30 2008 AL30
620072 2008 VK11 2008 VK11
647951 2010 AL30 2010 AL30
Originally posted by Phedreus
So according to my calc. it will pass 50,000 km outside the orbit of the moon.
Laser beams are used because they remain tightly focused for large distances. Nevertheless, there is enough dispersion of the beam that it is about 7 kilometers in diameter when it reaches the Moon and 20 kilometers in diameter when it returns to Earth. Because of this very weak signal, observations are made for several hours at a time. By averaging the signal for this period, the distance to the Moon can be measured to an accuracy of about 3 centimeters (the average distance from the Earth to the Moon is about 385,000 kilometers).
Source
Originally posted by drphilxr
reply to post by the_denv
that means tomorrow - according to this cute unix cli program -
this object will come within 279,000 miles of earth or roughly
1 lunar distance.
Originally posted by the_denv
I was able to find the Telnet server address for "Jet Propulsion Laboratory" (JLP).
Telnet Server: ssd.jpl.nasa.gov
Telnet Port: 6775
JPL is apart of the Solar System Dynamics Group for NASA.
JPL currently runs a system on this telnet port called:
"Horizons On-Line Ephemeris System v3.35b"
* Small-body PARAMETER-MATCHING population searches
(use the small-body search engine as an alternative)
* Integration of USER-INPUT ORBITS
* SPK BINARY FILE production
* CLOSE-APPROACH TABLES