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All Sky Fireball Network

by Dr. Tony Phillips.

Every night, a network of NASA all-sky cameras scans the skies above the United States for meteoritic fireballs. Automated software maintained by NASA’s Meteoroid Environment Office calculates their orbits, velocity, penetration depth in Earth’s atmosphere and many other characteristics. Daily results are presented here on Spaceweather.com.

On Nov. 17, 2015, the network reported 38 fireballs.
(23 sporadics, 9 Northern Taurids, 3 Leonids, 2 November I Draconids, 1 omicron Eridanid)

In this diagram of the inner solar system, all of the fireball orbits intersect at a single point–Earth. The orbits are color-coded by velocity, from slow (red) to fast (blue). [Larger image] [movies]

 

Near Earth Asteroids

 

Potentially Hazardous Asteroids (PHAs) are space rocks larger than approximately 100m that can come closer to Earth than 0.05 AU. None of the known PHAs is on a collision course with our planet, although astronomers are finding new ones all the time.

On November 18, 2015 there were 1634 potentially hazardous asteroids.

Recent & Upcoming Earth-asteroid encounters:

Asteroid
Date(UT)
Miss Distance
Size
2015 VR64
Nov 12
3 LD
14 m
2015 VV105
Nov 13
9 LD
10 m
2015 VU65
Nov 14
5.2 LD
23 m
2015 VY105
Nov 15
0.09 LD
7 m
2015 VN105
Nov 16
5.5 LD
13 m
2015 VD105
Nov 16
7.2 LD
52 m
2015 VC106
Nov 18
7 LD
24 m
2005 UL5
Nov 20
5.9 LD
390 m
2015 VE66
Nov 21
7.5 LD
64 m
2015 VO142
Nov 24
1 LD
7 m
2015 VH2
Nov 24
12.9 LD
14 m
2003 EB50
Nov 29
48.8 LD
2.2 km
2007 BG29
Dec 1
54.1 LD
1.1 km
2015 VZ145
Dec 8
9.2 LD
81 m
1998 WT24
Dec 11
10.9 LD
1.1 km
2011 YD29
Dec 24
9.7 LD
24 m
2003 SD220
Dec 24
28.4 LD
1.8 km
2008 CM
Dec 29
22.8 LD
1.5 km
2004 MQ1
Jan 2
55.4 LD
1.1 km
1999 JV6
Jan 6
12.6 LD
410 m

Notes: LD means “Lunar Distance.” 1 LD = 384,401 km, the distance between Earth and the Moon. 1 LD also equals 0.00256 AU. MAG is the visual magnitude of the asteroid on the date of closest approach.

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