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Blobrana


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An asteroid discovered by The University of Arizona's Catalina Sky Survey has a one-in-75 chance of hitting Mars on Jan. 30, scientists say.
Catalina Sky Survey team member Andrea Boattini discovered the asteroid, designated 2007 WD5, with the UA's Mount Lemmon 60-inch telescope in the Santa Catalina Mountains north of Tucson on Nov. 20.
At the time, the asteroid was at 20th magnitude brightness, which is about 400,000 times fainter than the faintest object most people can see with their naked eye on a dark night, survey team member Ed Beshore said. The asteroid is now 16 times dimmer than it was when it was discovered.

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Astronomers funded by NASA are monitoring the trajectory of an asteroid estimated to be 164-feet wide that is expected to cross Mars' orbital path early next year. Observations provided by the astronomers and analysed by NASA's Near-Earth Object Office at the Jet Propulsion Laboratory in Pasadena, Calif., indicate the object may pass within 30,000 miles of Mars at about 6 a.m. EST on Jan. 30, 2008.
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Blobrana


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Close Approaches (from 1950 to 2100):

Planet Date MJD Nominal Distance (AU) Minimum Possible Distance (AU) Stretching (AU) Width (AU) Close approach probability Linearity Applies
MARS 1979/11/12.52732 44189.5 0.0041586 0.0018114 1.586 1.534e-06 0.0105 Yes
EARTH 2003/09/04.32035 52886.3 0.117648 0.0738157 0.3738 1.531e-06 0.166 No
EARTH 2007/11/01.90406 54405.9 0.0475788 0.0467735 0.0002718 6.378e-07 1 Yes
MARS 2008/01/30.61407 54495.6 0.0007047 0.0006231 0.002265 2.278e-06 1 Yes
EARTH 2011/10/23.62062 55857.6 0.0287407 0.012798 0.251 1.14e-05 0.265 No
EARTH 2015/10/13.52324 57308.5 0.0319844 0.0218033 0.3299 2.201e-05 0.201 No
EARTH 2019/11/06.38928 58793.4 0.081454 0.0620155 3.867 8.247e-06 0.0164 No
EARTH 2023/11/19.63400 60267.6 0.187414 0.0612895 6.016 7.366e-06 0.0105 No
EARTH 2092/11/08.17890 85459.2 0.173025 0.162923 4.185 8.863e-06 0.00924 No

Source neodys

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Blobrana


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2007WD5

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Blobrana


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Mars could be in for an asteroid hit. A newly discovered asteroid, known as 2007 WD5, has a 1 in 75 chance of impacting into the Red Planet on Jan. 30.

"These odds are extremely unusual. We frequently work with really long odds when we track ... threatening asteroids" - Steve Chesley, an astronomer with the Near Earth Object Program at NASA's Jet Propulsion Laboratory.

The asteroid was discovered in late November and is similar in size to an object that hit remote central Siberia in 1908.
Scientists tracking the asteroid, currently halfway between Earth and Mars, initially put the odds of impact at 1 in 350 but increased the chances this week. Scientists expect the odds to diminish again early next month after getting new observations of the asteroid's orbit.

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Ephemeris    

 Date__(UT)__HR:MN     R.A._(ICRF/J2000.0)_DEC  APmag            delta      deldot    S-O-T /r    S-T-O

 2007-Dec-21 00:00     04 57 58.07 +25 43 40.5  22.98 .316562017412884  14.5729460 167.0830 /T   9.7802
 2007-Dec-26 00:00     05 01 14.95 +26 02 27.5  23.43 .360229199410559  15.6795688 162.8108 /T  12.6020
 2007-Dec-30 00:00     05 03 56.83 +26 13 30.2  23.77 .397511663832618  16.6029800 159.3928 /T  14.7112
 2008-Jan-04 00:00     05 07 32.09 +26 23 39.1  24.17 .447167701310112  17.7936913 155.1527 /T  17.1409
 2008-Jan-09 00:00     05 11 27.75 +26 30 46.9  24.55 .500294860961933  19.0027878 150.9760 /T  19.3265
 2008-Jan-14 00:00     05 15 47.82 +26 35 40.9  24.90 .556908523835786  20.2038939 146.8831 /T  21.2629
 2008-Jan-19 00:00     05 20 33.61 +26 38 52.0  25.24 .616952573024485  21.3767130 142.8836 /T  22.9550
 2008-Jan-24 00:00     05 25 44.01 +26 40 39.5  25.55 .680341470847182  22.5222652 138.9760 /T  24.4166
 2008-Jan-25 00:00     05 26 48.88 +26 40 52.1  25.61 .693414561215633  22.7490221 138.2049 /T  24.6826
 2008-Jan-26 00:00     05 27 54.65 +26 41 02.0  25.67 .706618393097977  22.9749957 137.4372 /T  24.9402
 2008-Jan-27 00:00     05 29 01.31 +26 41 09.2  25.73 .719952496372361  23.2001246 136.6728 /T  25.1895
 2008-Jan-28 00:00     05 30 08.85 +26 41 13.7  25.79 .733416370738012  23.4243788 135.9117 /T  25.4304
 2008-Jan-29 00:00     05 31 17.27 +26 41 15.7  25.85 .747009545440988  23.6479600 135.1540 /T  25.6632
 2008-Jan-30 00:00     05 32 26.56 +26 41 15.0  25.90 .760732141116207  23.8742853 134.3996 /T  25.8879
 2008-Jan-31 00:00     05 33 37.60 +26 41 12.5  25.96 .774566757429267  24.0273406 133.6517 /T  26.1030



-- Edited by Blobrana at 14:05, 2007-12-21

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