Contents  on 20 September '07

Resources:

Note: Until September 16th this daily news page, which had included links to news and science papers as well as some occasional original reporting, was called Major News About Minor Objects. Without the news-link and science-link sections, this page was renamed as The Tracking News to more more accurately reflect its continuing purpose.

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 20 September '07

The MPC's NEO Confirmation Page has 8 listings: 8 updated

When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had eight updated listings. Of these, four were "one nighters." So far Tracking News has counted a total of fourteen 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 20 September '07

Minor Planet Electronic Circulars

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


MPEC 2007-S36 - "23:11 UT" - Comet P/2007 S1 (Zhao)


MPEC 2007-S35 - "20:33 UT" - 2007 SV1


MPEC 2007-S34 - "19:51 UT" - 2003 SS422, 2003 UC414, 2003 WN193, 2003 WO193, 2006 TK121


MPEC 2007-S33 - "19:11 UT" - 2007 SU1


MPEC 2007-S32 - "18:00 UT" - 2007 SS1


MPEC 2007-S31 - "17:50 UT" - 2007 SR1


<< DOU on 20 Sept. '07 >>  MPEC 2007-S30 - "06:09 UT" - Daily Orbit Update

Observers  on 20 September '07

A total of 28 observing facilities appear in today's MPECs.

CodeObserver / observatory
B37Ametlla del Valles Obs. in Spain, 1 in MPEC 2007-S30 -- 16636
H55Astronomical Research Obs. in Illinois, 8 in MPECs 2007-S30 & 2007-S31 -- 2007 SR1, 2007 SJ, 2007 SH, 2007 RY19, 2007 RU9, 2007 RS17, 2007 RP9, 2007 RP133
235CAST Obs. in Italy, 1 in MPEC 2007-S36 -- P/2007 S1
B09Capannoli Obs. in Italy, 2 in MPEC 2007-S30 -- 2007 QK2, 1999 JU3
703Catalina Sky Survey in Arizona, 4 in MPECs 2007-S30, 2007-S33 & 2007-S35 -- 2007 SV1, 2007 SU1, 2001 QC34, 1999 JU3
807Cerro Tololo Inter-American Obs. in Chile, 5 in MPEC 2007-S34 -- 2006 TK121, 2003 WO193, 2003 WN193, 2003 UC414, 2003 SS422
448Desert Moon Obs. in New Mexico, 9 in MPEC 2007-S30 -- 2007 RV19, 2007 RR9, 2007 RR12, 2007 RP133, 2007 RM133, 2007 RF5, 2007 RF2, 2007 RD20, 2007 PA8
151Eschenberg Obs. in Switzerland, 6 in MPEC 2007-S30 -- 2007 RV19, 2007 RE1, 2007 PE8, 2007 LR32, 2002 SV, 1998 SD15
H51Greiner Research Obs. in Wisconsin, 3 in MPEC 2007-S30 -- 2007 PU11, 2007 LR32, 2002 SV
024Heidelberg-Konigstuhl Obs. in Germany, 1 in MPEC 2007-S35 -- 2007 SV1
B15Inastars Obs. in Germany, 3 in MPEC 2007-S30 -- 2007 RW19, 2007 RR12, 2007 HW3
701Junk Bond Obs. in Arizona, 2 in MPECs 2007-S30 & 2007-S36 -- 2007 SJ, P/2007 S1
704LINEAR in New Mexico, 10 in MPECs 2007-S30 & 2007-S33 -- 2007 SU1, 2007 RV19, 2007 RR17, 2002 SV, 1999 JU3, 16636, 100756, 4503, 2212, 1865
699LONEOS in Arizona, 1 in MPEC 2007-S36 -- P/2007 S1
560Madonna di Dossobuono Obs. in Italy, 2 in MPEC 2007-S30 -- 2005 OU1, 2004 RD252
118Modra Obs. in Slovakia, 1 in MPEC 2007-S30 -- 2006 VV2
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2007-S30 -- 2007 SJ
A53Peschiera del Garda Obs. in Italy, 2 in MPEC 2007-S30 -- 2007 LR32, 1998 SD15
H45Petit Jean Mtn. South Obs. in Arkansas, 3 in MPEC 2007-S30 -- 2007 LR32, 1999 JU3, 1998 SD15
D29Purple Mtn. Obs. XuYi Station in China, 1 in MPEC 2007-S36 -- P/2007 S1
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2007-S36 -- P/2007 S1
473Remanzacco Obs. in Italy, 3 in MPECs 2007-S30, 2007-S35 & 2007-S36 -- 2007 SV1, P/2007 S1, 2007 DA41
204Schiaparelli Obs. in Italy, 1 in MPEC 2007-S36 -- P/2007 S1
E12Siding Spring Survey in New South Wales, 1 in MPEC 2007-S32 -- 2007 SS1
510Siegen Obs. in Germany, 1 in MPEC 2007-S30 -- 86324
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2007-S30 & 2007-S31 -- 2007 SR1, 2007 RV9, 2007 RT12, 154330
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2007-S30 & 2007-S31 -- 2007 SR1, 2007 RT146, 2007 RQ133
F85Tiki Obs. in Tahiti, 1 in MPEC 2007-S32 -- 2007 SS1

Impact Risk Monitoring  on 20 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 SJJPL14022023-2105316.3e-08-2.90-3.560JPL: "Analysis based on 32 observations spanning 2.1033 days (2007-Sep-17.18208 to 2007-Sep-19.28541)." Diameter approximately 1.852 km. from mean, weighted H=16.3.
NEODyS14022011-2087306.81e-08-2.54-3.090NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2007/09/17.183 to 2007/09/19.286."
2007 RY19JPL14022016-21071517.5e-05-3.07-3.940JPL: "Analysis based on 28 observations spanning 4.7161 days (2007-Sep-14.35284 to 2007-Sep-19.0689)." Diameter approximately 0.110 km. from mean, weighted H=22.4.
NEODyS14022016-2090923.6e-05-3.25-3.860NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2007/09/14.354 to 2007/09/19.070."
2007 RU9JPL14022020-203933.2e-07-3.96-4.140JPL: "Analysis based on 70 observations spanning 7.9421 days (2007-Sep-10.28596 to 2007-Sep-18.22807)." Diameter approximately 0.230 km. from mean, weighted H=20.8.
NEODyS1402203012.79e-07-4.08-4.080NEODyS: "Based on 72 optical observations (of which 2 are rejected as outliers) from 2007/09/10.287 to 2007/09/18.229."
2007 RT146JPL1402R E M O V E DJPL: Risk listing removed at 1343 UTC.
NEODyS1401R E M O V E D
2007 RQ133JPL1402R E M O V E DJPL: Risk listing removed at 1254 UTC.
NEODyS1401R E M O V E D

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 20 September '07

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

2336Grabbed MPEC 2007-S36 - Comet P/2007 S1 (Zhao) - see above
2104Grabbed MPEC 2007-S33 - 2007 SU1 - see above
Grabbed MPEC 2007-S34 - 2003 SS422, 2003 UC414, 2003 WN193, 2003 WO193, 2006 TK121 - see above
Grabbed MPEC 2007-S35 - 2007 SV1 - see above
1820Grabbed MPEC 2007-S32 - 2007 SS1 - see above
1759Grabbed MPEC 2007-S31 - 2007 SR1 - see above
1402Noted that JPL has removed 2007 RQ133 as an impact risk - see above
Noted that JPL has removed 2007 RT146 as an impact risk - 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 RY19 risk assessment - see above
Noted that NEODyS has updated its 2007 RY19 risk assessment - see above
Noted that JPL has updated its 2007 SJ risk assessment - see above
Noted that NEODyS has updated its 2007 SJ risk assessment - see above
Grabbed MPEC 2007-S30 - Daily Orbit Update - see above
1401Noted that NEODyS has removed 2007 RQ133 as an impact risk - see above
Noted that NEODyS has removed 2007 RT146 as an impact risk - see above