Contents  on 15 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 15 September '07

Minor-Object Science  on 15 September '07

NEOCP Activity  on 15 September '07

The MPC's NEO Confirmation Page has 21 listings: 12 new, 9 updated

When last checked at 2334 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had twelve new and nine updated listings. Of these, fourteen were "one nighters." So far Major News has counted a total of 33 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 15 September '07

Minor Planet Electronic Circulars

As of last check at 2334 UTC, there have been ten MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2007-R92 - "16:17 UT" - 2007 RD20


MPEC 2007-R91 - "16:14 UT" - 2007 RC20


MPEC 2007-R90 - "14:33 UT" - 2007 RA20


MPEC 2007-R89 - "14:30 UT" - 2007 RZ19


MPEC 2007-R88 - "14:27 UT" - 2007 RY19


MPEC 2007-R87 - "14:24 UT" - 2007 RX19


MPEC 2007-R86 - "14:21 UT" - 2007 RW19


MPEC 2007-R85 - "14:18 UT" - 2007 RV19


MPEC 2007-R84 - "14:16 UT" - 2007 RU19


<< DOU on 15 Sept. '07 >>  MPEC 2007-R83 - "06:07 UT" - Daily Orbit Update

Observers  on 15 September '07

A total of 23 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. in Illinois, 8 in MPEC 2007-R83 -- 2007 RY8, 2007 RV9, 2007 RT9, 2007 RS9, 2007 RS17, 2007 NQ, 2007 MB24, 1995 SA
J51Atlante Obs. in the Canary Islands, 2 in MPEC 2007-R83 -- 21277, 3200
I77CEAMIG-REA in Brazil, 4 in MPECs 2007-R85, 2007-R86, 2007-R87 & 2007-R90 -- 2007 RX19, 2007 RW19, 2007 RV19, 2007 RA20
703Catalina Sky Survey in Arizona, 9 in MPECs 2007-R83, 2007-R87 & 2007-R91 -- 2007 RX19, 2007 RU12, 2007 RF2, 2007 RD1, 2007 RC20, 2007 HE15, 2002 SV, 136849, 4954
448Desert Moon Obs. in New Mexico, 4 in MPEC 2007-R83 -- 2007 RQ9, 2007 RF5, 2007 JZ20, 2003 UR12
639Dresden Obs. in Germany, 2 in MPEC 2007-R83 -- 2007 PE8, 2007 LR32
651Grasslands Obs. in Arizona, 2 in MPECs 2007-R85 & 2007-R86 -- 2007 RW19, 2007 RV19
145Gravenwezel, 3 in MPEC 2007-R83 -- 2007 PU11, 2007 PE8, 2007 LR32
J95Great Shefford Obs. in England, 4 in MPECs 2007-R85, 2007-R86, 2007-R87 & 2007-R88 -- 2007 RY19, 2007 RX19, 2007 RW19, 2007 RV19
H51Greiner Research Obs. in Wisconsin, 2 in MPECs 2007-R83 & 2007-R85 -- 2007 RV19, 2002 SV
701Junk Bond Obs. in Arizona, 2 in MPEC 2007-R83 -- 2007 RV17, 2007 RU17
704LINEAR in New Mexico, 15 in MPECs 2007-R83, 2007-R85, 2007-R86 & 2007-R88 -- 2007 RY19, 2007 RW19, 2007 RV19, 2007 RR9, 2007 RR17, 2007 RP15, 2007 QK2, 2002 RT129, 68063, 153271, 144900, 138883, 5143, 4183, 1865
699LONEOS in Arizona, 4 in MPEC 2007-R83 -- 2002 RN129, 1999 JU3, 16636, 100756
130Lumezzane Obs. in Italy, 5 in MPEC 2007-R83 -- 2007 RF2, 2007 DA41, 2002 RC118, 1998 SD15, 86324
711McDonald Obs. in Texas, 8 in MPECs 2007-R83 & 2007-R85 -- 2007 RV9, 2007 RV19, 2007 RU12, 2007 RT1, 2007 RF5, 2007 PQ, 2002 OD20, 15745
474Mt. John Obs. in New Zealand, 1 in MPEC 2007-R83 -- 2007 KD
G96Mt. Lemmon Survey in Arizona, 6 in MPECs 2007-R83, 2007-R84, 2007-R85, 2007-R86, 2007-R89 & 2007-R91 -- 2007 RZ19, 2007 RW19, 2007 RV19, 2007 RU19, 2007 RC20, 2002 RT129
E12Siding Spring Survey in New South Wales, 4 in MPECs 2007-R83, 2007-R90 & 2007-R92 -- 2007 RD20, 2007 RA20, 89355, 54686
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2007-R83 -- 14402
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2007-R83, 2007-R84 & 2007-R89 -- 2007 RZ19, 2007 RV9, 2007 RU9, 2007 RU19, 2007 RT9, 2007 RT12, 2007 RE1, 2007 PF6, 2007 DL41
A78Stia Obs. in Italy, 5 in MPEC 2007-R83 -- 2007 RU9, 2006 RO36, 2005 WJ56, 2005 OU1, 2003 SW222
6735Jim Young via Table Mtn. Obs. in southern California, 2 in MPECs 2007-R83 & 2007-R88 -- 2007 RY19, 2007 RU10
A48Verona Obs. in Italy, 3 in MPEC 2007-R83 -- 2007 RP15, 2007 RJ1, 16636

Impact Risk Monitoring  on 15 September '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2334 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 RY19JPL19302014-20927521.7e-05-3.03-3.870JPL: "Analysis based on 12 observations spanning 1.1075 days (2007-Sep-14.35284 to 2007-Sep-15.46036)." Diameter approximately 0.142 km. from mean, weighted H=21.9.
2007 RX19JPL20162021-2107535.4e-08-3.81-4.540JPL: "Analysis based on 12 observations spanning .87310 days (2007-Sep-14.27499 to 2007-Sep-15.14809)." Diameter approximately 0.622 km. from mean, weighted H=18.7.
2007 RV9NEODyS14552024-2077134.12e-08-4.53-4.790NEODyS: "Based on 31 optical observations (of which 1 are rejected as outliers) from 2007/09/10.289 to 2007/09/14.257."
JPL14542011-210787.8e-09-5.23-5.560JPL: "Analysis based on 31 observations spanning 3.9683 days (2007-Sep-10.28811 to 2007-Sep-14.25639)." Diameter approximately 0.358 km. from mean, weighted H=19.9.
2007 RU9NEODyS14552013-2076204.41e-06-2.58-3.010NEODyS: "Based on 44 optical observations (of which 2 are rejected as outliers) from 2007/09/10.287 to 2007/09/14.293."
JPL14542013-2071164.4e-06-2.57-3.000JPL: "Analysis based on 42 observations spanning 4.0065 days (2007-Sep-10.28596 to 2007-Sep-14.29242)." Diameter approximately 0.234 km. from mean, weighted H=20.8.
2007 RT9NEODyS14552026-2088257.59e-08-4.60-5.170NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2007/09/10.285 to 2007/09/14.279."
JPL14542028-2107337.9e-08-4.61-5.200JPL: "Analysis based on 27 observations spanning 3.9942 days (2007-Sep-10.28434 to 2007-Sep-14.27856)." Diameter approximately 0.357 km. from mean, weighted H=19.9.
2007 RA20JPL18042016-2107644.6e-08-4.60-5.150JPL: "Analysis based on 11 observations spanning .68203 days (2007-Sep-14.60499 to 2007-Sep-15.28702)." Diameter approximately 0.362 km. from mean, weighted H=19.9.

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 15 September '07

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

2135Added A/CC news report, "Lowell blog"
Added link to news story, "September 13th Dawn Journal" - see above
Added link to news story, "Fragmenting comet reveals inner self" - see above
Added link to news story, "Fasten Your Seat Belts" - see above
Added link to news story, "Two flying objects populate skies Thursday" - see above
2016Noted that JPL has posted 2007 RX19 as an impact risk - see above
1930Noted that JPL has posted 2007 RY19 as an impact risk - see above
1804Noted that JPL has posted 2007 RA20 as an impact risk - see above
1801Added MOS paper, "An asteroid breakup 160 Myr ago as the probable source of the K/T impactor" - see above
1736Grabbed MPEC 2007-R91 - 2007 RC20 - see above
Grabbed MPEC 2007-R92 - 2007 RD20 - see above
1455Noted that NEODyS has updated its 2007 RT9 risk assessment - see above
Noted that NEODyS has updated its 2007 RU9 risk assessment - see above
Noted that NEODyS has updated its 2007 RV9 risk assessment - see above
Grabbed MPEC 2007-R83 - Daily Orbit Update - see above
Grabbed MPEC 2007-R88 - 2007 RY19 - see above
Grabbed MPEC 2007-R89 - 2007 RZ19 - see above
Grabbed MPEC 2007-R90 - 2007 RA20 - see above
1454Noted 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 JPL has updated its 2007 RV9 risk assessment - see above
Grabbed MPEC 2007-R84 - 2007 RU19 - see above
Grabbed MPEC 2007-R85 - 2007 RV19 - see above
Grabbed MPEC 2007-R86 - 2007 RW19 - see above
Grabbed MPEC 2007-R87 - 2007 RX19 - see above