"You'll poke yer eye out, kid!"
Posted on 01/18/2007 12:17:02 AM PST by Orlando
Asteroid 2007 BB to pass between 0.0026 au or 0.0025 au. The distance to the moon is 0.00256 au(238,855 miles). Earth is okay from any impact. Just for your information.
Orbit Simulation
http://neo.jpl.nasa.gov/cgi-bin/db_shm?sstr=2007%20BB
Here's more data:
http://www.hohmanntransfer.com/crt.htm#2007bb
The asteroid appears to cross Earths orbit twice in the NASA simulation. Have any idea when that will be.
Will the asteroid be visible either day with say binoculars?
Jan 19th(Friday).
Estimated Diameter: 7.8m-18m
"Will the asteroid be visible either day with say binoculars?"
I don't know ?
This data is not yet on
http://www.spaceweather.com
"You'll poke yer eye out, kid!"
LOL! That's cool
http://www.brera.mi.astro.it/sormano/teca.html
Sun, Solar Winds data:
http://www.n3kl.org
ping
ping
Could it hit the moon?
Just how big is this "BB"?
It's smaller than the 98, but both have been discontinued.
potential future Earth impact events
http://neo.jpl.nasa.gov/risk/
this showed up in the Google search:
http://www.boingboing.net/2006/07/03/bigass_asteroid_whoo.html
Monday, July 3, 2006
Big-ass asteroid whooshes by Earth, too close for comfort
A very large asteroid flew a mere 270,000 miles from Earth's surface today, just a tad farther than our moon. But then 2004-XP14 read the bumper sticker on Earth's backside which read, "Get any closer and I'll fart!," so the asteroid veered off. And here we are, all of us, unsmashed -- for now.
and from a prophecies forum:
Jan. 17 #2: The discovery of 2007 BB has been announced, discovered this morning and confirmed alone by the CSS, which followed it over a span of 6.77 hours. JPL is showing that this tiny object will pass Earth at about one lunar distance on January 19th. And the MPC is indicating that it will go out of view for all ground-based telescopes around the 23rd.
from your link, Orlando...South Australia.
is that allah (hopefully)sending another black rock to mecca?
I am sorry it's 10 meter?
1525 hrs UT is 1025 hrs(EST) 10:25 am
It's just another Russian booster rocket. :0
Damn Russians.
btw..big comet
check out the new image from Auckland, New Zealand by Jamie Newman(WOW!!!)
http://www.spaceweather.com
Even experienced astronomers have never seen anything like it--a sweeping fan of comet dust visible to the unaided eye despite city lights and twilight. Jamie Newman sends this picture from Auckland, New Zealand
TDB more or less supersedes the older astronomical time standard, ET or ephemeris time.
TDB is currently not much different than UTC (colloquially UTC = GMT) and you can think of it that way. Currently TBD leads UTC by 65.132 seconds+periodic terms, 10:25 TDB is more like 10:24 UTC.
They make it hard on those of us avg joe, I suppose, because that is not the audience they are addressing. If you know what the "heliocentric ecliptic J2000" is you probably know what TDB is. Visit astronomy.com or sky2nite.com for popularizations. (I don't mean that at all dismissively, please don't take offense.)
Visit: http://tycho.usno.navy.mil/systime.html for an authoritative, if somewhat dense, explanation of timescales.
Although the various timescales in usage seem arcane and pedantic, they serve a purpose. UT is determined by the orientation of the Earth with respect to the "fixed" stars and conventional models of precession. It is intended to make the sun transit the Greenwich meridian at noon, when corrected by the equation of time. UTC is an atomic timescale that is kept within 0.9 seconds of UT by adding or subtracting leap seconds periodically.
By the nineteenth century, sufficient accurate astronomical observations were available and reduced to indicate that the rotation of the Earth was irregular when compared to the motion of astronomical bodies. (Largely based on Simon Newcomb's reduction of the lunar occulations of stars observed by the Paris observatory in the eighteenth century.) Newcomb invented our current system of mean solar time and introduced a timescale called Ephemeris Time (ET) that was more regular and predictable than the Earth's rotation.
With the invention of atomic clocks in the 1940's time standards that were potentially more uniform than ET became available. Today the standard for time worldwide is TAI maintained by BIPM outside of Paris. TAI is determined by an ensemble of atomic clocks maintained by national standards laboratories around the world. The various standards are weighted by the inverse of their variance from ensemble average. Most of the weight is accorded to time standards kept by the U.S. Naval Observatory and NIST. (Within the United States there is some unacknowledged rivalry between these two organizations.)
TAI was approximately equal to UTC on January 1, 1958. These days, they differ by an integer number of "leap seconds", currently 33. Ephemeris time was equal to UTC sometime around 1900. Ephemeris time was replace by Terrestial Dynamical Time TDT or TT. TT leads TAI by exactly 32.184 seconds, now and forever, world without end. Amen. TT is based on atomic time measured on the sea level surface of the Earth. General Relativity theory (unlike Global Warming Theory) makes useful and verifiable predictions. One is that time progresses differently in different reference frames, with differing local gravitational field and accelerations (rotation is an acceleration). Why the motions of the celestial bodies should care about (be influenced by) variations in the local gravity field at 3450 Massachusetts Avenue, NW, Washington, D.C. is not a question physicists care to ponder. Rather, an artificial timescale based on an irrotational time standard located at the center of gravity of the solar system, but calibrated to run at the same rate as a time standard on the surface of the Earth, on average, is introduced. It differs from TT only by periodic terms, never more than about 0.002 seconds. It rejoices in the sobriquet Barycentric Dynamical Time, TDB, to his friends.
The solar wind can move things around. A satellite orbiting the moon at low altitude would have to undergo frequent course correction to avoid letting the satellite orbit intersect the surface of the moon. Also, solar sails can get a tremendous delta v from solar wind.
Heh... what a relief... one of the old Apollo upper stages pulled this stunt a few years back.
That picture is great. look how bright it is even behind cloud cover. WOW !!!
Alot of new 2007 asteroids being found within 48 hours .
Shed pieces of comets and whatnot.
Check out this image(19Jan07) from Mudgee NSW Aust.
http://www.iceinspace.com.au/forum/attachment.php?attachmentid=22192&d=1169214261
WOW! thanks.
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