All Sky Fireball Network - May 20th, 2014

 Space Weather
by Dr. Tony Phillips.

All Sky Fireball Network

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 May. 20, 2014, the network reported 8 fireballs.
(8 sporadics)

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 May 21, 2014 there were 1475 potentially hazardous asteroids.

Recent & Upcoming Earth-asteroid encounters:
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.

Asteroid	Date(UT)	Miss Distance	Size
2010 JO33	May 17	4 LD	43 m
2014 KD	May 19	7.7 LD	57 m
2014 KD2	May 20	5.2 LD	41 m
2005 UK1	May 20	36.7 LD	1.1 km
1997 WS22	May 21	47.1 LD	1.5 km
2002 JC	May 24	48.7 LD	1.4 km
2014 HQ124	Jun 8	3.3 LD	620 m
2011 PU1	Jul 18	7.6 LD	43 m

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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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