Saturday22 May 20047:47pm MDT2004-05-23 UTC 0147 back top next  

The Asteroid/Comet Connection's
daily news journal about
asteroids, comets, and meteors


Today's issue status: done
yesterdayMaytomorrowIndex

Cover: NEO 2004 JA has had 423 positions reported since discovery 21 days ago. One of five facilities with observations in the Saturday Daily Orbit Update MPEC is New Mexico Skies, where Robert Hutsebaut caught this image during the full Moon May 5th at magnitude R=15.5 using a remote-controlled telescope. This stack of twelve 20-second exposures is seen in Astrometrica, which here uses green circles to show reference stars used to calculate the target's location, while yellow and blue circles mark background objects not used. From its brightness, 2004 JA is estimated to be on the order of 880 meters/yards wide.

News briefs – panel 1/1 Major News for 22 May 2004 back top next  
News briefs

Montrose fireball:  The Montrose, Colorado Daily Press has an article dated tomorrow (posted late today), “Meteor explodes above Montrose,” It tells about the all-sky club at Montrose High (MHS) whose camera, one of ten now at Colorado schools, caught a fireball aimed right at them before dawn on the morning of their last day of classes. On his special report page, Chris Peterson has added a 96Kb GIF animation of the spectacular MHS camera result. See also an article at the Grand Junction, Colorado Daily Sentinel today. These items mention the 2002 Thanksgiving fireball, which A/CC reported here.

As A/CC told yesterday, the Sandia National Lab all-sky camera in Albuquerque, New Mexico caught the Montrose fireball. Another Sandia bright meteor has been posted from a few hours earlier (463 Kb movie), at 11:12pm MDT Thursday night, coming almost directly at the camera from the west.

New Earth co-orbital:  Today at Astronomy.com, an article, “A new ‘moon’ for Earth,” reports that

2004 GU9 has been found by Martin Connors et al. to be co-orbital with Earth in an orbit of “remarkable stability.” You may remember that 2004 GU9 was listed with impact solutions during 1416 April.

Bits & pieces:  Astronomy.com has an article today, "Blushing asteroids," about space weathering of asteroid surfaces. See more links here ("Readings") about that subject, as well as a University of Hawaii Institute for Astronomy (IfA) May 19th news release.

Just noticed is an IfA May 7th request for quotation on a mirror blank for a Pan-STARRS 1.8m telescope. It requests the most aggressive possible delivery schedule, “but not so aggressive that it adds extra costs for special efforts. We need the first blank as soon as possible and have funding in place now. Funding for the remaining three blanks becomes available first in April 2005.” And it notes that “it is possible that experience with our first prototype telescope may justify building four substantially redesigned telescopes rather than just three additional copies of the prototype. Thus we may decide to purchase a total of five rather than four blanks.”

Risk monitoring - panel 1/1 Major News for 22 May 2004 back top next  
Risk monitoring 22 May

Today NEODyS posted 2004 JA27. That object isn't reported in the Saturday Daily Orbit Update MPEC, but the Minor Planet Center Last Observation page shows that LINEAR in New Mexico caught it this morning.

Summary Risk Table - sources checked at 2359 UTC, 22 May

Object

Assessment

Years

VI
PS
cum
PS
max
T
S
Arc 
days
 2004 JA27 NEODyS 5/222030-20573-5.34-5.5606.062
JPL 5/222041-20572-5.59-5.7906.062
 2004 HZJPL 5/182023-20231-5.27-5.27018.114
NEODyS 5/14R E M O V E D
VI = count of "virtual impactors" (impact solutions)
See A/CC's Consolidated Risk Tables for more and maybe
  newer details, and check the monitors' links for latest info.
Note that only objects recently in view are shown here.
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