[meteorite-list] Fireball Observed Over California

From: Ron Baalke <baalke_at_meteoritecentral.com>
Date: Wed, 23 Oct 2013 12:13:30 -0700 (PDT)
Message-ID: <201310231913.r9NJDUmb013396_at_zagami.jpl.nasa.gov>


Ames Research Center
News blog:
California fireball of 2013 October 22th at 19:54:03 local time (Oct 23
at 02:54:03 UT), in a video compilation by Dave Samuels in Brentwood using
a Watec 902H2 Ultimate camera with 12mm/f1.2 lens and the CAMS single-camera

2013, Oct 22 - A bright fireball was seen by many in the Bay Area this
evening around 19:54 local time in California. Bryant Grigsby reported
that it caught his attention by the shadows it cast on a wall in front
of him. Karen Randall described it as green, fragmenting towards the end.
At the College of San Mateo, Daryl Stanford said: "It started out bluish
white, then turned green; and it finally seemed to spiral and fragment
at the end." Indications are that this meteor ended over the ocean. Nevertheless,
the CAMS records are being collected. The first in is that of station
213 (Dave Samuels in Brentwood), shown in the picture above. The meteor
left the field of view at the bottom, only the beginning part is shown.
Keep tuned for a trajectory solution and updates.

Update (Oct 23 1:30 am local time): The Sunnyvale station operated by
Jim Albers caught the fireball on cameras 53, 11, 12, 152, 171 and 173!
Camera 53 shows the beginning part of the trajectory (see picture above).

Combining the Sunnyvale camera 53 astrometry with results from the 213
camera in Brentwood provides the following preliminary solution from
triangulation (calculations by Peter Jenniskens, SETI Institute and NASA
Ames Research Center, based on observations by CAMS project participants
Dave Samuels and Jim Albers):

Meteor was first seen at 02:53:59.5 UT (19:53:59 local time)
Entered Earth atmosphere with speed 17.3 km/s
Trajectory came from the East.
Arrived from a direction Right Ascension = 26.5 degree, Declination =
+11.2 degrees, near the star o Piscium.
First seen at 87.8 km altitude, at Lat = +37.636N, Long = 121.8092W.
Trajectory was shallow: inclined by 19.5 degrees with horizontal.
Was tracked by CAMS camera 213 down to 60.9 km at Lat = 37.6475N Long
= 122.6466W.
The meteoroid penetrated well below that.
Meteoroid pre-atmospheric orbit had the following properties:
low-inclined orbit: inclination = 3.8 degrees
Short orbit: semi-major axis = 1.15 AU
Low perihelion distance = 0.653 AU

According to Jenniskens, based on these preliminary results this was not
a member of the Taurid shower, but likely a rock of asteroidal origin.
Sadly, any surviving meteorites would have landed in the Pacific Ocean.
Received on Wed 23 Oct 2013 03:13:30 PM PDT

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