Dawn spacecraft transport preparations. 
Credit: NASA/Jim Grossmann.

Workers at Astrotech move the platform with the Dawn spacecraft in preparation for transport back to the launch pad. See news Saturday about restarting the launch campaign. Credit: NASA/Jim Grossmann.

Contents  on 10 September '07


The latest news: framed access (best), RSS news feed (flags updates), or redirection - Note: A/CC has a main Web site and a backup site.

Navigation tips: Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days this year through a calendar interface. And use the all-up news archive to access news from any time since A/CC began in early 2002. To keep track of what's new each day, watch the Chronology section.

Minor-Object News  on 10 September '07

Minor-Object Science  on 10 September '07

NEOCP Activity  on 10 September '07

The MPC's NEO Confirmation Page has 13 listings: 13 new

When last checked at 2048 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had thirteen new listings. All of these were "one nighters." So far Major News has counted a total of 20 objects listed on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs  on 10 September '07

Minor Planet Electronic Circulars

As of last check at 2048 UTC, there have been five MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2007-R41 - "16:25 UT" - 2007 RA9

MPEC 2007-R40 - "16:21 UT" - 2007 RZ8

MPEC 2007-R39 - "16:18 UT" - 2007 RY8

MPEC 2007-R38 - "16:14 UT" - 2007 RX8

<< DOU on 10 Sept. '07 >>  MPEC 2007-R37 - "06:06 UT" - Daily Orbit Update

Observers  on 10 September '07

Fourteen observing facilities appear in today's MPECs.

CodeObserver / observatory
I77CEAMIG-REA in Brazil, 1 in MPEC 2007-R41 -- 2007 RA9
157Frasso Sabino Obs. in Italy, 5 in MPEC 2007-R37 -- 2007 RF2, 2007 QK2, 2007 PU11, 2007 LR32, 1998 SD15
130Lumezzane Obs. in Italy, 8 in MPEC 2007-R37 -- 2007 QE3, 2007 PU11, 2007 PE8, 2007 OV, 2001 QC34, 2000 QT7, 21277, 100756
G96Mt. Lemmon Survey in Arizona, 2 in MPECs 2007-R38 & 2007-R39 -- 2007 RY8, 2007 RX8
A24New Millennium Obs. in Italy, 4 in MPEC 2007-R37 -- 2007 PE8, 2007 LR32, 2002 NN4, 16636
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2007-R40 -- 2007 RZ8
B38Santa Mama Obs. in Italy, 4 in MPEC 2007-R37 -- 2007 RJ1, 2007 QK2, 2003 OR14, 105140
204Schiaparelli Obs. in Italy, 4 in MPEC 2007-R37 -- 2007 RG2, 2007 RE2, 2006 WW1, 16636
D21Shenton Park Obs. in Western Australia, 2 in MPEC 2007-R37 -- 2007 RF5, 2007 RE2
E12Siding Spring Survey in New South Wales, 8 in MPECs 2007-R37 & 2007-R41 -- 2007 RA9, 2007 PR9, 2007 PQ9, 85275, 66959, 42286, 5496, 4953
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2007-R40 -- 2007 RZ8
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2007-R37 & 2007-R40 -- 2007 RZ8, 2007 RE1, 2007 PV27, 2007 PF6, 2007 PB8, 2006 FX, 2004 XJ35, 2004 UL, 2003 AE23
A78Stia Obs. in Italy, 4 in MPEC 2007-R37 -- 2007 QA2, 2007 PP9, 2007 PE8, 2007 OV
6735Jim Young via Table Mtn. Obs. in southern California, 2 in MPECs 2007-R38 & 2007-R40 -- 2007 RZ8, 2007 RX8

Impact Risk Monitoring  on 10 September '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2048 UTC)
See the CRT page for a list of all objects rated recently as risks.
Note that the time horizon for JPL is 100 years from today and for NEODyS is now usually the year 2090.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.





Notes for Today's Latest Risk Assessments
2007 RF2JPL14102103-210742.3e-09-6.52-6.820JPL: "Analysis based on 29 observations spanning 3.6192 days (2007-Sep-05.41331 to 2007-Sep-09.03248)." Diameter approximately 0.273 km. from mean, weighted H=20.5.
2007 RE1JPL1410R E M O V E DJPL: Risk listing removed at 1000 UTC.
2007 RA9JPL19052018-209637.4e-10-6.26-6.470JPL: "Analysis based on 22 observations spanning .59512 days (2007-Sep-09.70952 to 2007-Sep-10.30464)." Diameter approximately 0.443 km. from mean, weighted H=19.4.

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

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 this.

Chronology  on 10 September '07

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

2028Added A/CC news report, "Bits & pieces"
1906Added link to news story, "AGU journal highlights -- Sept. 6, 2007" - see above
1905Noted that JPL has posted 2007 RA9 as an impact risk - see above
1650Grabbed MPEC 2007-R41 - 2007 RA9 - see above
1622Grabbed MPEC 2007-R38 - 2007 RX8 - see above
Grabbed MPEC 2007-R39 - 2007 RY8 - see above
Grabbed MPEC 2007-R40 - 2007 RZ8 - see above
1500Added MOS paper, "Can giant planets form by gravitational fragmentation of discs?" - see above
Added MOS paper, "Characterization of the near-Earth Asteroid 2002 NY40" - see above
Added MOS paper, "Spitzer-MIPS survey of the young stellar content in the Vela Molecular Cloud-D" - see above
1456Grabbed MPEC 2007-R37 - Daily Orbit Update - see above
1410Noted that JPL has removed 2007 RE1 as an impact risk - see above
Noted that JPL has updated its 2007 RF2 risk assessment - see above
1409Noted that NEODyS has removed 2007 RE1 as an impact risk - see above