Departing temporary moon 6R10DB9 
June 15th at Great Shefford Obs.

Earth's temporary and apparently natural satellite, tiny asteroid 6R10DB9, was caught again by Peter Birtwhistle late on June 15th. Two positions are seen here from an animation, each from a stack of 20 four-second exposures. The object is moving 47"/min. downward. Scale is 2.14"/pixel and north is up. The astrometry from that observing session and a session last night are reported in DASOs 106 and 107. Imagery copyright Great Shefford Observatory, where you will find more details and the animation. See also news on June 3rd.
      JPL indicates that Goldstone in southern California succeeded in observing 6R10DB9 with radar. See the 6R10DB9 Planning page for more about that effort.

Contents  on 19 June '07

WELCOME to A/CC's prototype daily news publication designed to be the viewing end of a planned autonomous 24-hour news service. The new tools and this publication format are working well enough now to share with readers. It is expected that this approach will require less time to maintain than our previous news and small asteroid pages, which were retired on May 14th. There's still more development ahead and there probably will be some glitches along the way, but this is what's needed to keep up with the increasing pace of minor-object news. The CRT page will be maintained separately for a little while longer, until all of this is working smoothly. And the CRT and small-asteroid ephemerides will be kept going.

Minor-Object News  on 19 June '07

Minor-Object Science  on 19 June '07

NEOCP Activity  on 19 June '07

The MPC's NEO Confirmation Page has 3 listings: 3 new

When last checked at 1703 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new listings. All of these were "one nighters."

New MPECs  on 19 June '07

Minor Planet Electronic Circulars

As of last check at 1703 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 19 June '07 >>  MPEC 2007-M15 - "06:07 UT" - Daily Orbit Update

Observers  on 19 June '07

Fourteen observing facilities appear in today's MPECs.

A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2007-M15 -- 2007 LT19
H55Astronomical Research Obs. in Illinois, 13 in MPEC 2007-M15 -- 2007 LB15, 2007 MG, 2007 LL, 2007 HA59, 2006 XA, 2006 VY13, 2006 GB, 2005 JA22, 2002 AV31, 2000 PP9, 2000 KW43, 23183, 9162
G77Baldwin Lake Obs. in southern California, 1 in MPEC 2007-M15 -- 2005 NW44
703Catalina Sky Survey in Arizona, 6 in MPEC 2007-M15 -- 2007 LL, 2007 FK1, 2002 AQ3, 2002 AC2, 2001 SE170, 7977
651Grasslands Obs. in Arizona, 4 in MPEC 2007-M15 -- 2007 LQ19, 2007 MF, 2007 MH, 2007 MG
J95Great Shefford Obs. in England, 1 in MPEC 2007-M15 -- 2007 LT19
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2007-M15 -- 1998 QQ52
J47Nazaret Obs. in Spain, 1 in MPEC 2007-M15 -- 2007 FV42
A24New Millennium Obs. in Italy, 16 in MPEC 2007-M15 -- 2007 BB50, 2006 SJ134, 2002 TD60, 155341, 152895, 143381, 53435, 5693, 5646, 5626, 4544, 3103, 2212, 1943, 1866, 1627
461SZTE Asteroid Program in Hungary, 1 in MPEC 2007-M15 -- 1999 VO6
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2007-M15 -- 2006 WO127, 3551
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2007-M15 -- 2007 LB15, 1999 JU3
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2007-M15 -- 2007 MQ
198Wildberg Obs. in Germany, 1 in MPEC 2007-M15 -- 2007 LB15

Impact Risk Monitoring  on 19 June '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 1703 UTC)
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2080.
For the latest official risk assessments, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.





Notes for Today's Latest Risk Assessments
2007 LQ19NEODyS12542011-2079172.26e-06-1.97-2.580NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2007/06/13.788 to 2007/06/17.392."
JPL12532011-2105392.8e-06-1.93-2.530JPL: "Analysis based on 14 observations spanning 3.6040 days (2007-Jun-13.78733 to 2007-Jun-17.39138)." Diameter approximately 0.861 km. from mean, weighted H=18.0.
2007 LB15NEODyS12542024-2078106.82e-08-3.53-3.600NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2007/06/13.347 to 2007/06/18.975."
JPL12532024-209491.2e-07-3.35-3.440JPL: "Analysis based on 41 observations spanning 5.6271 days (2007-Jun-13.3467 to 2007-Jun-18.97376)." Diameter approximately 0.614 km. from mean, weighted H=18.7.

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

For a list of all risk-rated objects recently in view, see our ephemerides page.

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from an orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" for more about all this.

Chronology  on 19 June '07

Times are UTC for when the items were noted by Major News.

1500Added link to news story, "NASA Asteroid Report: Picking Over the Bones of Contention"
1300Added MOS paper, "Dust crystallinity in protoplanetary disks: the effect of diffusion/viscosity ratio" - see above
Added link to news story, "Dawn ELV status report"
1254Noted that NEODyS has updated its 2007 LB15 risk assessment - see above
Noted that NEODyS has updated its 2007 LQ19 risk assessment - see above
1253Noted that JPL has updated its 2007 LB15 risk assessment - see above
Noted that JPL has updated its 2007 LQ19 risk assessment - see above
Grabbed MPEC 2007-M15 - Daily Orbit Update - see above