Contents  on 6 September '07

Resources:

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 6 September '07

Minor-Object Science  on 6 September '07

NEOCP Activity  on 6 September '07

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

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new listings. Both of these were "one nighters." So far Major News has counted a total of six 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 6 September '07

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there have been eight MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2007-R29 - "17:18 UT" - 2004 PF115


MPEC 2007-R28 - "15:21 UT" - 2007 RF5


MPEC 2007-R27 - "13:01 UT" - 2007 OC10


<< DOU on 6 Sept. '07 >>  MPEC 2007-R26 - "06:08 UT" - Daily Orbit Update


MPEC 2007-R25 - "02:26 UT" - 2007 NC7


MPEC 2007-R24 - "02:08 UT" - 2007 RG2


MPEC 2007-R23 - "02:05 UT" - 2007 RF2


MPEC 2007-R22 - "02:02 UT" - 2007 RE2

Observers  on 6 September '07

Sixteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. in Illinois, 5 in MPEC 2007-R26 -- 2007 RT1, 2007 LD, 2007 LB15, 2007 HD70, 2002 UO3
413(K. Sarneczky via Australian Natl. Univ. 1m telescope in New South Wales, 2 in MPECs 2007-R23 & 2007-R28 -- 2007 RF5, 2007 RF2
703Catalina Sky Survey in Arizona, 7 in MPECs 2007-R22, 2007-R23, 2007-R24, 2007-R26 & 2007-R28 -- 2007 RG2, 2007 RF5, 2007 RF2, 2007 RE2, 2007 PE8, 2003 EF54, 16636
448Desert Moon Obs. in New Mexico, 3 in MPEC 2007-R26 -- 2007 MM13, 1998 VR, 1997 GH28
J95Great Shefford Obs. in England, 7 in MPECs 2007-R22, 2007-R23, 2007-R24, 2007-R26 & 2007-R28 -- 2007 RJ1, 2007 RG2, 2007 RG1, 2007 RF5, 2007 RF2, 2007 RF1, 2007 RE2
B15Inastars Obs. in Germany, 1 in MPEC 2007-R26 -- 20826
699LONEOS in Arizona, 1 in MPEC 2007-R26 -- 16636
G96Mt. Lemmon Survey in Arizona, 4 in MPEC 2007-R26 -- 2007 RJ1, 2007 RG1, 2007 RE1, 85867
675Mt. Palomar in southern California, 3 in MPECs 2007-R25, 2007-R27 & 2007-R29 -- 2007 OC10, 2007 NC7, 2004 PF115
A13Naef Obs. in Switzerland, 2 in MPEC 2007-R26 -- 2007 QE3, 2007 PU11
A24New Millennium Obs. in Italy, 4 in MPEC 2007-R26 -- 86039, 154453, 154007, 4544
B04Saint-Barthelemy Obs. in Italy, 2 in MPECs 2007-R22 & 2007-R23 -- 2007 RF2, 2007 RE2
204Schiaparelli Obs. in Italy, 4 in MPECs 2007-R26 & 2007-R28 -- 2007 RG2, 2007 RF5, 2007 RF2, 2007 RE2
D21Shenton Park Obs. in Western Australia, 2 in MPEC 2007-R26 -- 2007 RT1, 2007 RF1
E12Siding Spring Survey in New South Wales, 1 in MPEC 2007-R26 -- 89355
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2007-R28 -- 2007 RF5

Impact Risk Monitoring  on 6 September '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2354 and JPL at 2355 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.
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
2007 RS1NEODyS14272014-202526.22e-05-6.07-6.070NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2007/09/04.241 to 2007/09/04.392."
2007 RF2JPL14282015-21072137.3e-07-3.51-4.350JPL: "Analysis based on 16 observations spanning .63804 days (2007-Sep-05.41331 to 2007-Sep-06.05135)." Diameter approximately 0.280 km. from mean, weighted H=20.4.
NEODyS14272010-20891283.7e-07-3.66-4.480NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2007/09/05.414 to 2007/09/06.052."
2007 RE1JPL14282030-2105141.3e-07-5.29-5.730JPL: "Analysis based on 28 observations spanning 2.8674 days (2007-Sep-02.40469 to 2007-Sep-05.27209)." Diameter approximately 0.143 km. from mean, weighted H=21.9.
NEODyS14272030-2076121.51e-07-5.25-5.700NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2007/09/02.405 to 2007/09/05.273."

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 6 September '07

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

1823Added link to news story, "September 3rd Dawn Journal" - see above
Added link to news story, "2007 Aurigid Shower" - see above
Added link to news story, "September 2007 Observations" - see above
Added link to news story, "Asteroid explorer's kitlist includes a ribbon" - see above
1821Grabbed MPEC 2007-R29 - 2004 PF115 - see above
1634Grabbed MPEC 2007-R28 - 2007 RF5 - see above
1428Noted that JPL has updated its 2007 RE1 risk assessment - see above
Noted that JPL has posted 2007 RF2 as an impact risk - see above
Grabbed MPEC 2007-R26 - Daily Orbit Update - see above
1427Noted that NEODyS has updated its 2007 RE1 risk assessment - see above
Noted that NEODyS has posted 2007 RF2 as an impact risk - see above
Noted that NEODyS has posted 2007 RS1 as an impact risk - see above
Grabbed MPEC 2007-R27 - 2007 OC10 - see above
0644Added MOS paper, "SUBARU Near-Infrared Multi-Color Images of Class II Young Stellar Object, RNO91" - see above
Added MOS paper, "The potential for Earth-mass planet formation around brown dwarfs" - see above
Added link to news story, "Ribbon plan for asteroid mission" - see above
Added link to news story, "Meteorite shower blamed for emergency calls" - see above
0446Grabbed MPEC 2007-R25 - 2007 NC7 - see above
0223Grabbed MPEC 2007-R22 - 2007 RE2 - see above
Grabbed MPEC 2007-R23 - 2007 RF2 - see above
Grabbed MPEC 2007-R24 - 2007 RG2 - see above