Dawn spacecraft with solar panel 
credit NASA/George Shelton

The NASA Dawn Main-Belt asteroid mission reports that last week "the solar arrays were attached to the spacecraft and the system for deploying them in space was given one final test, which went very smoothly." Here Astrotech "workers check the Dawn spacecraft after testing the deployment of its more than 32-foot-long solar panels on one side." Credit: NASA/George Shelton.


Contents  on 30 May '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 30 May '07

Minor-Object Science  on 30 May '07

NEOCP Activity  on 30 May '07

The MPC's NEO Confirmation Page has 2 listings: 1 updated, 1 comet

When last checked at 2356 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one updated and one comet listing. Of these, none were "one nighters."

New MPECs  on 30 May '07

Minor Planet Electronic Circulars

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


MPEC 2007-K69 - "22:37 UT" - Comets C/2007 F4, 2007 F5, 2007 G2, 2007 H4, 2007 H5 (SOHO)


MPEC 2007-K68 - "22:30 UT" - Comets C/2007 D5, 2007 E5, 2007 F2, 2007 F3 (SOHO)


<< DOU on 30 May '07 >>  MPEC 2007-K67 - "06:09 UT" - Daily Orbit Update

Observers  on 30 May '07

Six observing facilities appeared in this day's MPECs.

B20Carmelita Obs. in Spain, 1 in MPEC 2007-K67 -- 2002 KF4
448Desert Moon Obs. in New Mexico, 5 in MPEC 2007-K67 -- 2007 KN4, 2007 JE40, 2007 JH22, 2007 HX82, 2007 FE1
J95Great Shefford Obs. in England, 2 in MPEC 2007-K67 -- 2007 JZ20, 2007 DK8
A24New Millennium Obs. in Italy, 15 in MPEC 2007-K67 -- 2006 YA, 2006 XJ1, 2006 UN216, 2006 UM, 2006 SH7, 2004 YG1, 2002 AN11, 143381, 141018, 137099, 137084, 96315, 16834, 1943, 1627
E12Siding Spring Survey in New South Wales, 2 in MPEC 2007-K67 -- 2000 LL, 108519
2492LASCO Coronagraph 2 via the Solar & Heliospheric Obs. in Earth-Sun L1 HALO orbit, 7 in MPECs 2007-K68 & 2007-K69 -- C/2007 H5, C/2007 H4, C/2007 G2, C/2007 F5, C/2007 F4, C/2007 F3, C/2007 F2
2493LASCO Coronagraph 3 via the Solar & Heliospheric Obs. in Earth-Sun L1 HALO orbit, 5 in MPECs 2007-K68 & 2007-K69 -- C/2007 F4, C/2007 F3, C/2007 F2, C/2007 E5, C/2007 D5

Impact Risk Monitoring  on 30 May '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2356 and JPL at 2357 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.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2004 XN44JPL05092009-206395.3e-09-4.08-4.500JPL: "Analysis based on 17 observations spanning 1.9567 days (2004-Dec-13.253512 to 2004-Dec-15.210231)." Diameter approximately 0.748 km. from mean, weighted H=18.3.

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 30 May '07

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

2357Grabbed MPEC 2007-K68 - Comets C/2007 D5, 2007 E5, 2007 F2, 2007 F3 (SOHO) - see above
Grabbed MPEC 2007-K69 - Comets C/2007 F4, 2007 F5, 2007 G2, 2007 H4, 2007 H5 (SOHO) - see above
1919Added link to news story, "Study: Comet Wiped Out First Americans"
Added link to news story, "Government of Canada supports campaign against light pollution by ASTROLab of Mount Megantic"
1324Grabbed MPEC 2007-K67 - Daily Orbit Update - see above
0510Added MOS paper, "The AU Microscopii Debris Disk: Multiwavelength Imaging and Modeling" - see above
0509Noted that JPL has updated its 2004 XN44 risk assessment - see above