Contents  on 16 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 16 September '07

NEOCP Activity  on 16 September '07

The MPC's NEO Confirmation Page has 32 listings: 20 new, 12 updated

When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had 20 new and twelve updated listings. Of these, 21 were "one nighters." So far Tracking 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 16 September '07

Minor Planet Electronic Circulars

As of last check at 2355 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 16 Sept. '07 >>  MPEC 2007-S01 - "06:07 UT" - Daily Orbit Update

Observers  on 16 September '07

Seventeen observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. in Illinois, 27 in MPEC 2007-S01 -- 2007 RZ8, 2007 RZ19, 2007 RY9, 2007 RY19, 2007 RX8, 2007 RX19, 2007 RW19, 2007 RV9, 2007 RV19, 2007 RV12, 2007 RU9, 2007 RU10, 2007 RT9, 2007 RT1, 2007 RS12, 2007 RP9, 2007 RP17, 2007 RG2, 2007 RF5, 2007 RF2, 2007 LQ19, 2005 YW55, 2004 VW14, 2004 MD6, 2003 TL4, 2002 TE66, 2001 YJ4
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2007-S01 -- 21374
703Catalina Sky Survey in Arizona, 5 in MPEC 2007-S01 -- 2007 RE2, 1998 SV4, 87309, 86324, 159399
A77Chante-Perdrix Obs. in France, 1 in MPEC 2007-S01 -- 2007 RU10
A94Cormons Obs. in Italy, 1 in MPEC 2007-S01 -- 2007 PE8
448Desert Moon Obs. in New Mexico, 4 in MPEC 2007-S01 -- 2007 RR12, 2007 RJ1, 2007 RF2, 2007 QA2
151Eschenberg Obs. in Switzerland, 4 in MPEC 2007-S01 -- 2007 RU9, 2007 RR9, 1999 JU3, 1998 SD15
B21Gaisberg Obs. in Austria, 1 in MPEC 2007-S01 -- 2007 RT17
J95Great Shefford Obs. in England, 1 in MPEC 2007-S01 -- 2007 RJ1
H51Greiner Research Obs. in Wisconsin, 1 in MPEC 2007-S01 -- 2007 RP15
196Homburg-Erbach Obs. in Germany, 1 in MPEC 2007-S01 -- 16636
704LINEAR in New Mexico, 13 in MPEC 2007-S01 -- 2007 RW19, 2007 RV19, 2007 RF5, 2007 PE8, 2005 GE59, 2002 SV, 1988 PA, 66251, 143678, 138883, 136617, 3200, 1865
D35Lulin Minor Bodies Tracking in Taiwan, 3 in MPEC 2007-S01 -- 2007 RX19, 2007 RW19, 2007 RV19
G96Mt. Lemmon Survey in Arizona, 4 in MPEC 2007-S01 -- 2005 TP45, 1999 SO5, 143651, 2201
423North Ryde Obs. in New South Wales, 1 in MPEC 2007-S01 -- 3753
E12Siding Spring Survey in New South Wales, 2 in MPEC 2007-S01 -- 2007 RA20, 54686
291Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2007-S01 -- 2007 RV9, 2007 RU9, 2007 RT9, 2004 DM44

Impact Risk Monitoring  on 16 September '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS 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 RY19NEODyS16342015-20903681.79e-05-3.14-3.820NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2007/09/14.354 to 2007/09/15.461."
JPL14572015-21075891.6e-05-3.27-4.220JPL: "Analysis based on 15 observations spanning 1.1075 days (2007-Sep-14.35284 to 2007-Sep-15.46036)." Diameter approximately 0.138 km. from mean, weighted H=22.0.
2007 RX19JPL1457R E M O V E DJPL: Risk listing removed at 1402 UTC.
2007 RV9JPL14572030-204231.2e-08-5.08-5.330JPL: "Analysis based on 42 observations spanning 5.1125 days (2007-Sep-10.28811 to 2007-Sep-15.40065)." Diameter approximately 0.364 km. from mean, weighted H=19.9.
NEODyS14572030-205441.19e-08-5.07-5.310NEODyS: "Based on 43 optical observations (of which 1 are rejected as outliers) from 2007/09/10.289 to 2007/09/15.401."
2007 RU9JPL14572018-206971.9e-06-3.04-3.230JPL: "Analysis based on 57 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.
NEODyS14572018-203032.03e-06-3.02-3.220NEODyS: "Based on 59 optical observations (of which 2 are rejected as outliers) from 2007/09/10.287 to 2007/09/15.934."
2007 RT9JPL14572028-2107224.2e-08-4.81-5.300JPL: "Analysis based on 35 observations spanning 5.1040 days (2007-Sep-10.28434 to 2007-Sep-15.38835)." Diameter approximately 0.376 km. from mean, weighted H=19.8.
NEODyS14572028-2088184.44e-08-4.77-5.270NEODyS: "Based on 35 optical observations (of which 0 are rejected as outliers) from 2007/09/10.285 to 2007/09/15.389."
2007 RA20JPL1457R E M O V E DJPL: Risk listing removed at 1242 UTC.

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 16 September '07

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

2223Added A/CC news report, "Daily news format change"
1634Noted that NEODyS has posted 2007 RY19 as an impact risk - see above
1458Grabbed MPEC 2007-S01 - Daily Orbit Update - see above
1457Noted that JPL has removed 2007 RA20 as an impact risk - see above
Noted that JPL has updated its 2007 RT9 risk assessment - see above
Noted that NEODyS 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 removed 2007 RX19 as an impact risk - see above
Noted that JPL has updated its 2007 RY19 risk assessment - see above