Contents  on 5 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 5 June '07

Minor-Object Science  on 5 June '07

NEOCP Activity  on 5 June '07

The MPC's NEO Confirmation Page has 2 listings: 2 new

When last checked at 2037 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new listings. Both of these were "one nighters." This listing info is unchanged since when checked at 0106 UTC on today.

New MPECs  on 5 June '07

Minor Planet Electronic Circulars

There were nine MPECs issued this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2007-L16 - "18:45 UT" - Comets C/2004 A4, 2004 B11, 2005 B5, 2005 B6, 2006 A8, 2007 J5, 2007 J6 (SOHO)

MPEC 2007-L15 - "15:47 UT" - PHAs

MPEC 2007-L14 - "15:47 UT" - Unusual Minor Planets

MPEC 2007-L13 - "15:47 UT" - Amors

MPEC 2007-L12 - "15:47 UT" - Atens and Apollos

MPEC 2007-L11 - "15:41 UT" - Critical-List Minor Planets

MPEC 2007-L10 - "15:36 UT" - Distant Minor Planets

MPEC 2007-L09 - "14:14 UT" - Observable Comets

<< DOU on 5 June '07 >>  MPEC 2007-L08 - "06:06 UT" - Daily Orbit Update

Observers  on 5 June '07

Three observing facilities appeared in this day's MPECs.

5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2007-L08 -- 2004 XN44
E12Siding Spring Survey in New South Wales, 7 in MPEC 2007-L08 -- 2007 KD, 2007 JJ35, 2007 JY2, 2007 HE15, 2007 FE20, 2007 CF19, 2006 DP14
2492LASCO Coronagraph 2 via the Solar & Heliospheric Obs. in Earth-Sun L1 HALO orbit, 2 in MPEC 2007-L16 -- C/2007 J6, C/2007 J5
2493LASCO Coronagraph 3 via the Solar & Heliospheric Obs. in Earth-Sun L1 HALO orbit, 5 in MPEC 2007-L16 -- C/2006 A8, C/2005 B6, C/2005 B5, C/2004 B11, C/2004 A4

Impact Risk Monitoring  on 5 June '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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
2004 XN44JPL23592013-2094231.4e-07-3.02-3.250JPL: "Analysis based on 21 observations spanning 3.0217 days (2004-Dec-13.253512 to 2004-Dec-16.275236)." Diameter approximately 0.740 km. from mean, weighted H=18.3.
NEODyS14412013-2079223.27e-07-2.75-2.960NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2004/12/13.254 to 2004/12/16.276."

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 5 June '07

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

2359Noted that JPL has updated its 2004 XN44 risk assessment - see above
1939Grabbed MPEC 2007-L16 - Comets C/2004 A4, 2004 B11, 2005 B5, 2005 B6, 2006 A8, 2007 J5, 2007 J6 (SOHO) - see above
1938Added link to news story, "Meteorite to go on display in Wichita"
Added link to news story, "UC stamps its mark"
Added link to news story, "Scientists have eyes on the moon"
1703Grabbed MPEC 2007-L10 - Distant Minor Planets - see above
1702Grabbed MPEC 2007-L09 - Observable Comets - see above
Grabbed MPEC 2007-L11 - Critical-List Minor Planets - see above
Grabbed MPEC 2007-L12 - Atens and Apollos - see above
Grabbed MPEC 2007-L13 - Amors - see above
Grabbed MPEC 2007-L14 - Unusual Minor Planets - see above
Grabbed MPEC 2007-L15 - PHAs - see above
1441Noted that NEODyS has posted 2004 XN44 as an impact risk - see above
Grabbed MPEC 2007-L08 - Daily Orbit Update - see above
0556Added MOS paper, "Collisional processes and size distribution in spatially extended debris discs" - see above
Added MOS paper, "Fraction of Contact Binary Trojan Asteroids" - see above
Added MOS paper, "Hubble and Spitzer Observations of an Edge-on Circumstellar Disk around a Brown Dwarf" - see above
Added link to news story, "Asteroid Impact, Biological Crises and Death of the Dinos"