Contents  on 17 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.

NEOCP Activity  on 17 September '07

The MPC's NEO Confirmation Page has 13 listings: 12 new, 1 updated

When last checked at 2331 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had twelve new and one updated listings. All of these were "one nighters." So far Tracking News has counted a total of 35 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 17 September '07

Minor Planet Electronic Circulars

As of last check at 2331 UTC, there have been ten MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2007-S11 - "18:14 UT" - 2007 RQ133


MPEC 2007-S10 - "18:10 UT" - 2007 RP133


MPEC 2007-S09 - "18:08 UT" - 2007 RO133


MPEC 2007-S08 - "18:05 UT" - 2007 RN133


MPEC 2007-S07 - "18:01 UT" - 2007 RM133


MPEC 2007-S06 - "17:58 UT" - 2007 RL133


MPEC 2007-S05 - "17:42 UT" - 2004 ET21


MPEC 2007-S04 - "17:19 UT" - Comet P/2007 R4 (Garradd)


<< DOU on 17 Sept. '07 >>  MPEC 2007-S03 - "06:10 UT" - Daily Orbit Update


MPEC 2007-S02 - "02:46 UT" - Comet P/2007 R3 (Gibbs)

Observers  on 17 September '07

A total of 27 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. in Illinois, 5 in MPECs 2007-S02, 2007-S03, 2007-S06, 2007-S07 & 2007-S10 -- 2007 RT9, 2007 RP133, 2007 RM133, 2007 RL133, 2007 R3
I77CEAMIG-REA in Brazil, 1 in MPEC 2007-S04 -- 2007 R4
703Catalina Sky Survey in Arizona, 5 in MPECs 2007-S03, 2007-S06 & 2007-S07 -- 2007 RM133, 2007 RL133, 2007 DT103, 16816, 5786
J65Celbridge Obs. in Ireland, 2 in MPEC 2007-S03 -- 2007 PU11, 1999 JU3
113Drebach Obs. in Germany, 4 in MPEC 2007-S03 -- 2007 LR32, 2002 NN4, 2001 QC34, 1999 JU3
151Eschenberg Obs. in Switzerland, 3 in MPECs 2007-S03 & 2007-S10 -- 2007 RP133, 2007 PE8, 1998 SD15
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2007-S10 -- 2007 RP133
157Frasso Sabino Obs. in Italy, 8 in MPECs 2007-S02, 2007-S03 & 2007-S10 -- 2007 RV19, 2007 RR12, 2007 RP15, 2007 RP133, 2007 R3, 2007 PE8, 2002 UA31, 2001 SA270
J95Great Shefford Obs. in England, 7 in MPECs 2007-S02, 2007-S03, 2007-S06, 2007-S08, 2007-S09, 2007-S10 & 2007-S11 -- 2007 RQ133, 2007 RP9, 2007 RP133, 2007 RO133, 2007 RN133, 2007 RL133, 2007 R3
A17Guidestar Obs. in Germany, 3 in MPECs 2007-S02, 2007-S03 & 2007-S10 -- 2007 RY19, 2007 RP133, 2007 R3
B43Hennef Obs., 2 in MPEC 2007-S03 -- 16636, 1221
240Herrenberg Obs. in Germany, 5 in MPEC 2007-S03 -- 2007 RR9, 2007 RD1, 2005 OU1, 2004 OT11, 2002 RN129
196Homburg-Erbach Obs. in Germany, 1 in MPEC 2007-S03 -- 2007 PE8
B15Inastars Obs. in Germany, 2 in MPECs 2007-S03 & 2007-S10 -- 2007 RP133, 1999 JU3
704LINEAR in New Mexico, 14 in MPECs 2007-S03, 2007-S05 & 2007-S09 -- 2007 RV19, 2007 RR17, 2007 RP15, 2007 RO133, 2007 OV, 2004 RN9, 2004 ET21, 21277, 100756, 7092, 5143, 4183, 2212, 1865
699LONEOS in Arizona, 7 in MPECs 2007-S03 & 2007-S10 -- 2007 RU9, 2007 RQ17, 2007 RP133, 2007 OV, 17182, 152787, 4954
711McDonald Obs. in Texas, 1 in MPEC 2007-S02 -- 2007 R3
118Modra Obs. in Slovakia, 2 in MPECs 2007-S10 & 2007-S11 -- 2007 RQ133, 2007 RP133
474Mt. John Obs. in New Zealand, 5 in MPECs 2007-S03, 2007-S04, 2007-S05, 2007-S06 & 2007-S07 -- 2007 RM133, 2007 RL133, 2007 RA9, 2007 R4, 2004 ET21
G96Mt. Lemmon Survey in Arizona, 9 in MPECs 2007-S02, 2007-S03, 2007-S06, 2007-S07, 2007-S08 & 2007-S11 -- 2007 RQ133, 2007 RN133, 2007 RM133, 2007 RL133, 2007 R3, 2002 RT129, 1998 QB28, 152787, 6489
A13Naef Obs. in Switzerland, 2 in MPECs 2007-S02 & 2007-S10 -- 2007 RP133, 2007 R3
473Remanzacco Obs. in Italy, 2 in MPECs 2007-S02 & 2007-S10 -- 2007 RP133, 2007 R3
H36Sandlot Obs. in Kansas, 1 in MPEC 2007-S02 -- 2007 R3
E12Siding Spring Survey in New South Wales, 2 in MPECs 2007-S03 & 2007-S04 -- 2007 R4, 2007 ML6
H85Silver Spring Obs. in Maryland, 1 in MPEC 2007-S05 -- 2004 ET21
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2007-S02 & 2007-S03 -- 2007 RV9, 2007 R3
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2007-S08 -- 2007 RN133

Impact Risk Monitoring  on 17 September '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2331 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 RY19JPL13372016-21072845.6e-05-2.65-2.790JPL: "Analysis based on 19 observations spanning 2.5807 days (2007-Sep-14.35284 to 2007-Sep-16.93356)." Diameter approximately 0.130 km. from mean, weighted H=22.1.
NEODyS13372016-20901493.15e-05-2.67-2.740NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2007/09/14.354 to 2007/09/16.934."
2007 RV9JPL13372030-204223.7e-09-5.61-5.910JPL: "Analysis based on 45 observations spanning 5.1125 days (2007-Sep-10.28811 to 2007-Sep-15.40065)." Diameter approximately 0.364 km. from mean, weighted H=19.8.
NEODyS13372030-204233.72e-09-5.59-5.880NEODyS: "Based on 46 optical observations (of which 1 are rejected as outliers) from 2007/09/10.289 to 2007/09/15.401."
2007 RU9JPL13372018-206971.9e-06-3.04-3.200JPL: "Analysis based on 61 observations spanning 5.6475 days (2007-Sep-10.28596 to 2007-Sep-15.93348)." Diameter approximately 0.225 km. from mean, weighted H=20.9.
NEODyS13372018-203041.93e-06-3.02-3.190NEODyS: "Based on 63 optical observations (of which 2 are rejected as outliers) from 2007/09/10.287 to 2007/09/15.934."
2007 RT9JPL13372028-208843.2e-09-5.91-6.230JPL: "Analysis based on 38 observations spanning 5.9019 days (2007-Sep-10.28434 to 2007-Sep-16.186248)." Diameter approximately 0.390 km. from mean, weighted H=19.7.
NEODyS1336R E M O V E D
2007 RQ133JPL21562023-209541.2e-09-5.26-5.660JPL: "Analysis based on 12 observations spanning 1.6556 days (2007-Sep-15.475 to 2007-Sep-17.13061)." Diameter approximately 0.876 km. from mean, weighted H=17.9.

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 17 September '07

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

2156Noted that JPL has posted 2007 RQ133 as an impact risk - see above
1837Grabbed MPEC 2007-S04 - Comet P/2007 R4 (Garradd) - see above
Grabbed MPEC 2007-S05 - 2004 ET21 - see above
Grabbed MPEC 2007-S06 - 2007 RL133 - see above
Grabbed MPEC 2007-S07 - 2007 RM133 - see above
Grabbed MPEC 2007-S08 - 2007 RN133 - see above
Grabbed MPEC 2007-S09 - 2007 RO133 - see above
Grabbed MPEC 2007-S10 - 2007 RP133 - see above
Grabbed MPEC 2007-S11 - 2007 RQ133 - see above
1338Grabbed MPEC 2007-S03 - Daily Orbit Update - see above
1337Noted that JPL has updated its 2007 RT9 risk assessment - see above
Noted that JPL has updated its 2007 RU9 risk assessment - see above
Noted that NEODyS has updated its 2007 RU9 risk assessment - see above
Noted that JPL has updated its 2007 RV9 risk assessment - see above
Noted that NEODyS has updated its 2007 RV9 risk assessment - see above
Noted that JPL has updated its 2007 RY19 risk assessment - see above
Noted that NEODyS has updated its 2007 RY19 risk assessment - see above
1336Noted that NEODyS has removed 2007 RT9 as an impact risk - see above
0335Grabbed MPEC 2007-S02 - Comet P/2007 R3 (Gibbs) - see above