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Post Info TOPIC: Asteroid 2007 LQ19


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Title: Bright Fireballs Associated with the Potentially Hazardous Asteroid 2007LQ19
Author: Jose M. Madiedo, Josep M. Trigo-Rodriguez, Jose L. Ortiz, Alberto J. Castro-Tirado, Jesus Cabrera-Caņo

We analyze here two very bright fireballs produced by the ablation in the atmosphere of two large meteoroids in 2009 and 2010. These slow-moving and deep-penetrating events were observed over Spain in the framework of our Spanish Fireball Network continuous meteor monitoring campaign. The analysis of the emission spectrum imaged for one of these fireballs has provided the first clues about the chemical nature of the progenitor meteoroids. The orbital parameters of these particles suggests a likely association with the recently identified July rho-Herculid meteoroid stream. In addition, considerations about the likely parent body of this stream are also made on the basis of orbital dissimilarity criteria. This orbital analysis reveals that both meteoroids and PHA 2007LQ19 exhibit a similar evolution during a time period of almost 8,000 years, which suggests that either this NEO is the potential parent of these particles or that this NEO and both meteoroids had a common progenitor in the past.

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2007 LQ19
Earth Impact Risk Summary
Torino Scale (maximum) 0
Palermo Scale (maximum) -2.51
Palermo Scale (cumulative) -2.51
Impact Probability (cumulative) 1.5e-06
Number of Potential Impacts 1
Vimpact 17.99 km/s
Vinfinity 14.12 km/s
H 17.9
Diameter 0.900 km
Mass 1.0e+12 kg
Energy 3.9e+04 MT
all above are mean values
weighted by impact probability
Analysis based on
16 observations spanning 10.048 days
(2007-Jun-13.78733 to 2007-Jun-23.83582)


These results were computed on Jun 25, 2007
2007 LQ19
Earth Impact Table
Date Distance Width Sigma
Impact
Sigma
LOV
Stretch
LOV
Impact
Probability
Impact
Energy
Palermo
Scale
Torino
Scale
YYYY-MM-DD.DD (rEarth) (rEarth)     (rEarth)   (MT)    
2082-07-11.62  1.50   7.49e-01   0.665   -0.22702   9.31e+04   1.5e-06   3.87e+04   -2.51   0 

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