January 2010 Close Approaches

UPCOMING CLOSE APPROACHES TO EARTH
1 AU = ~150 million kilometers
1 LD = Lunar Distance = ~384,000 kilometers

Object
Name
Close
Approach
Date
Miss
Distance
(AU)
Miss
Distance
(LD)
Estimated
Diameter*
H
(mag)
Relative
Velocity
(km/s)
(2010 XR10) 2011-Jan-01 0.1648 64.1 52 m – 120 m 23.5 4.53
(2010 YD) 2011-Jan-02 0.0171 6.6 13 m – 30 m 26.5 9.35
(2008 EA32) 2011-Jan-07 0.1965 76.5 1.3 km – 3.0 km 16.5 14.64
(2009 DA43) 2011-Jan-09 0.1823 70.9 33 m – 73 m 24.5 8.46
(2009 BS5) 2011-Jan-11 0.0087 3.4 8.8 m – 20 m 27.4 5.56
(2010 XC25) 2011-Jan-11 0.1608 62.6 200 m – 460 m 20.6 17.79
(2000 AZ93) 2011-Jan-11 0.0477 18.6 220 m – 480 m 20.4 7.86
(2007 AA9) 2011-Jan-11 0.1710 66.6 100 m – 220 m 22.1 9.30
(2005 EE) 2011-Jan-11 0.0998 38.8 180 m – 390 m 20.9 7.42
152563 (1992 BF) 2011-Jan-12 0.1801 70.1 310 m – 690 m 19.7 7.32
(2009 TP) 2011-Jan-13 0.1848 71.9 52 m – 120 m 23.5 6.58
(2001 BA16) 2011-Jan-18 0.1823 70.9 18 m – 41 m 25.8 9.97
(2007 CA27) 2011-Jan-20 0.1384 53.9 160 m – 360 m 21.1 15.77
(2010 XB24) 2011-Jan-22 0.1647 64.1 110 m – 250 m 21.8 8.59
(2002 BN) 2011-Jan-22 0.1899 73.9 220 m – 490 m 20.4 17.30
(2003 YO3) 2011-Jan-26 0.1628 63.3 490 m – 1.1 km 18.7 16.61
(2001 CQ36) 2011-Jan-31 0.1255 48.8 77 m – 170 m 22.7 8.75
(1999 CG9) 2011-Jan-31 0.0948 36.9 24 m – 53 m 25.2 4.45



Be the first to comment - What do you think?  Posted by Stephen - December 27, 2010 at 12:16 am

Categories: Near-Earth Objects   Tags:

December 2010 Close Approaches

UPCOMING CLOSE APPROACHES TO EARTH
1 AU = ~150 million kilometers
1 LD = Lunar Distance = ~384,000 kilometers

Object
Name
Close
Approach
Date
Miss
Distance
(AU)
Miss
Distance
(LD)
Estimated
Diameter*
H
(mag)
Relative
Velocity
(km/s)
(2010 XW) 2010-Dec-26 0.0510 19.8 30 m – 66 m 24.8 8.00
(2010 RR179) 2010-Dec-26 0.1565 60.9 160 m – 360 m 21.1 11.06
(2010 WR7) 2010-Dec-26 0.0684 26.6 52 m – 120 m 23.5 5.02
(1999 LS7) 2010-Dec-26 0.1447 56.3 190 m – 430 m 20.7 10.37
(2007 MK13) 2010-Dec-27 0.1914 74.5 280 m – 620 m 19.9 14.23
(2010 XN) 2010-Dec-27 0.0596 23.2 35 m – 77 m 24.4 8.53
(2010 XG3) 2010-Dec-28 0.1442 56.1 120 m – 260 m 21.8 5.20
(2010 AF3) 2010-Dec-28 0.1483 57.7 16 m – 36 m 26.1 6.41
(2010 PR10) 2010-Dec-30 0.1580 61.5 120 m – 260 m 21.8 4.74

* Diameter estimates based on the object’s absolute magnitude.



Be the first to comment - What do you think?  Posted by Stephen - at 12:09 am

Categories: Near-Earth Objects   Tags:

Large Asteroid Impact (V)

Source: http://www.youtube.com/watch?v=LlF8APEkh-E

Be the first to comment - What do you think?  Posted by - August 1, 2010 at 4:37 am

Categories: Videos   Tags:

Asteroid 1999 RQ36 Impact Risk

A little past our lifetime but shows how real an asteroids impact is.

The potentially hazardous asteroid (101955) 1999 RQ36 has the possibility of collision with the Earth in the latter half of the 22nd century, well beyond the traditional 100-year time horizon for routine impact monitoring. The probabilities accumulate to a total impact probability of approximately 10E-3, with a pair of closely related routes to impact in 2182 comprising more than half of the total. The analysis of impact possibilities so far in the future is strongly dependent on the action of the Yarkovsky effect, which raises new challenges in the careful assessment of longer term impact hazards.
Even for asteroids with very precisely determined orbits, a future close approach to Earth can scatter the possible trajectories to the point that the problem becomes like that of a newly discovered asteroid with a weakly determined orbit. If the scattering takes place late enough so that the target plane uncertainty is dominated by Yarkovsky accelerations then the thermal properties of the asteroid,which are typically unknown, play a major role in the impact assessment. In contrast, if the strong planetary interaction takes place sooner, while the Yarkovsky dispersion is still relatively small compared to that derived from the measurements, then precise modeling of the nongravitational acceleration may be unnecessary.

Source: http://arxiv.org/abs/0901.3631

Be the first to comment - What do you think?  Posted by - July 31, 2010 at 6:47 pm

Categories: News   Tags: