Contents  on 18 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 18 September '07

The MPC's NEO Confirmation Page has 11 listings: 3 new, 8 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and eight updated listings. Of these, eight were "one nighters." So far Tracking News has counted a total of eighteen 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 18 September '07

Minor Planet Electronic Circulars

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


MPEC 2007-S16 - "22:45 UT" - Comet P/1999 R1 = 2003 R5 = 2007 R5 (SOHO)


MPEC 2007-S15 - "18:59 UT" - 2007 SH


MPEC 2007-S14 - "18:55 UT" - 2007 RT146


MPEC 2007-S13 - "18:46 UT" - 2007 RS146


<< DOU on 18 Sept. '07 >>  MPEC 2007-S12 - "06:09 UT" - Daily Orbit Update

Observers  on 18 September '07

Fifteen observing facilities appear in today's MPECs.

CodeObserver / observatory
A62Aichtal Obs. in Germany, 1 in MPEC 2007-S12 -- 2007 LR32
H55Astronomical Research Obs. in Illinois, 17 in MPEC 2007-S12 -- 2007 RY8, 2007 RV9, 2007 RU9, 2007 RU10, 2007 RT12, 2007 RS9, 2007 RR9, 2007 RQ17, 2007 RP9, 2007 RP12, 2007 RO17, 2007 RO1, 2007 RG2, 2007 LV8, 2007 LB15, 2004 ET21, 2003 NC
703Catalina Sky Survey in Arizona, 1 in MPEC 2007-S13 -- 2007 RS146
J95Great Shefford Obs. in England, 5 in MPECs 2007-S12, 2007-S14 & 2007-S15 -- 2007 SH, 2007 RV9, 2007 RT146, 2007 RO133, 2007 RN133
H51Greiner Research Obs. in Wisconsin, 4 in MPEC 2007-S12 -- 2007 RR12, 2007 RP15, 2007 RF5, 2007 RF2
B19Iluro Obs. in Spain, 4 in MPEC 2007-S12 -- 2007 PU11, 2007 PE8, 22771, 2212
987Isle of Man Obs. on the Isle of Man, 1 in MPEC 2007-S12 -- 152787
704LINEAR in New Mexico, 12 in MPECs 2007-S12 & 2007-S15 -- 2007 SH, 2007 RR9, 2007 QK2, 2007 PE8, 2007 OV, 2004 OT11, 2004 ET21, 152787, 143678, 138883, 5143, 4183
560Madonna di Dossobuono Obs. in Italy, 1 in MPEC 2007-S12 -- 2007 RJ1
932McCarthy Obs. in Connecticut, 1 in MPEC 2007-S15 -- 2007 SH
474Mt. John Obs. in New Zealand, 6 in MPEC 2007-S12 -- 2007 RW17, 2007 RD20, 2007 RA20, 2007 GW5, 2006 WY2, 2005 TR50
G96Mt. Lemmon Survey in Arizona, 2 in MPECs 2007-S13 & 2007-S14 -- 2007 RT146, 2007 RS146
H45Petit Jean Mtn. South Obs. in Arkansas, 18 in MPEC 2007-S12 -- 2007 RV19, 2007 RR17, 2007 RR12, 2007 RF2, 2007 RD1, 2007 QK2, 2007 PU11, 2007 PE8, 2007 OV, 2007 LR32, 2007 HE15, 2007 DA41, 2003 SW222, 2003 OR14, 2002 SV, 1999 JU3, 1998 SD15, 145656
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2007-S15 -- 2007 SH
2492LASCO Coronagraph 2 via the Solar & Heliospheric Obs. in Earth-Sun L1 HALO orbit, 3 in MPEC 2007-S16 -- 2007 R5, 2003 R5, 1999 R1
2493LASCO Coronagraph 3 via the Solar & Heliospheric Obs. in Earth-Sun L1 HALO orbit, 1 in MPEC 2007-S16 -- 2007 R5

Impact Risk Monitoring  on 18 September '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2354 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 RV9JPL1404R E M O V E DJPL: Risk listing removed at 1017 UTC.
NEODyS1404R E M O V E D
2007 RU9NEODyS14052018-203031.36e-06-3.25-3.570NEODyS: "Based on 66 optical observations (of which 2 are rejected as outliers) from 2007/09/10.287 to 2007/09/16.171."
JPL14042018-206961.2e-06-3.28-3.590JPL: "Analysis based on 64 observations spanning 5.8843 days (2007-Sep-10.28596 to 2007-Sep-16.1703)." Diameter approximately 0.223 km. from mean, weighted H=20.9.
2007 RT146JPL23032015-2062152.7e-09-5.11-5.620JPL: "Analysis based on 15 observations spanning 3.0228 days (2007-Sep-15.39403 to 2007-Sep-18.41686)." Diameter approximately 0.630 km. from mean, weighted H=18.6.
2007 RQ133NEODyS14052012-2090135.73e-10-4.83-5.130NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2007/09/15.476 to 2007/09/17.131."

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 18 September '07

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

2323Grabbed MPEC 2007-S16 - Comet P/1999 R1 = 2003 R5 = 2007 R5 (SOHO) - see above
2303Noted that JPL has posted 2007 RT146 as an impact risk - see above
1931Grabbed MPEC 2007-S13 - 2007 RS146 - see above
Grabbed MPEC 2007-S14 - 2007 RT146 - see above
Grabbed MPEC 2007-S15 - 2007 SH - see above
1405Noted that NEODyS has updated its 2007 RU9 risk assessment - see above
Grabbed MPEC 2007-S12 - Daily Orbit Update - see above
1404Noted that NEODyS has posted 2007 RQ133 as an impact risk - see above
Noted that JPL has updated its 2007 RU9 risk assessment - see above
Noted that JPL has removed 2007 RV9 as an impact risk - see above
Noted that NEODyS has removed 2007 RV9 as an impact risk - see above