Contents  on 25 September '07

Resources:

Notes: Due to travel, these pages will update irregularly for the rest of the month.
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 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 25 September '07

The MPC's NEO Confirmation Page has 4 listings: 4 new

When last checked at 1621 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new listings. Of these, three were "one nighters." So far Tracking News has counted a total of five 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 25 September '07

Minor Planet Electronic Circulars

As of last check at 1621 UTC, there have been ten MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2007-S57 - "16:04 UT" - Observations of Comets


MPEC 2007-S56 - "15:57 UT" - Comet P/2007 S1 (Zhao)


MPEC 2007-S55 - "15:47 UT" - Comet P/2007 R4 (Garradd)


MPEC 2007-S54 - "15:44 UT" - Comet P/2007 R3 (Gibbs)


MPEC 2007-S53 - "15:41 UT" - Comet P/2007 R2 (Gibbs)


MPEC 2007-S52 - "15:37 UT" - Comet P/2007 R1 (Larson)


MPEC 2007-S51 - "15:34 UT" - Comet P/2007 Q2 (Gilmore)


MPEC 2007-S50 - "15:29 UT" - Comet C/2007 N3 (Lulin)


MPEC 2007-S49 - "11:46 UT" - 2007 SG11


<< DOU on 25 Sept. '07 >>  MPEC 2007-S48 - "06:10 UT" - Daily Orbit Update

Observers  on 25 September '07

A total of 48 observing facilities appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 12 in MPECs 2007-S51, 2007-S54, 2007-S56 & 2007-S57 -- P/2007 S1, P/2007 R3, P/2007 Q2, P/2007 N1, C/2007 G1, C/2007 F1, C/2006 U6, C/2006 S5, C/2006 K1, C/2005 S4, 108P, 8P
B03Alter Satzberg Obs. in Austria, 3 in MPEC 2007-S48 -- 2007 SW2, 2007 SU1, 2007 RR12
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2007-S56 -- P/2007 S1
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2007-S57 -- P/2007 H1
413Australian Natl. Univ. 1m telescope in New South Wales, 1 in MPEC 2007-S57 -- C/2005 EL173
215Buchloe Obs. in Germany, 7 in MPECs 2007-S54 & 2007-S57 -- P/2007 R3, C/2007 JA21, P/2007 H3, P/2007 H1, C/2007 G1, C/2005 S4, 93P
235CAST Obs. in Italy, 4 in MPEC 2007-S57 -- P/2007 H1, C/2006 OF2, 93P, 50P
703Catalina Sky Survey in Arizona, 1 in MPEC 2007-S57 -- 50P
A77Chante-Perdrix Obs. in France, 2 in MPEC 2007-S57 -- 93P, 50P
J95Great Shefford Obs. in England, 3 in MPECs 2007-S48 & 2007-S49 -- 2007 SG11, 2007 RY19, 2007 RF2
458Guadarrama Obs. in Spain, 2 in MPEC 2007-S57 -- C/2006 OF2, 93P
442Gualba Obs. in Spain, 1 in MPEC 2007-S57 -- 29P
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2007-S57 -- C/2006 OF2, 93P
F84Hibiscus Obs. in Tahiti, 2 in MPEC 2007-S48 -- 2007 RM133, 2007 OY
196Homburg-Erbach Obs. in Germany, 1 in MPEC 2007-S57 -- 93P
987Isle of Man Obs. on the Isle of Man, 5 in MPEC 2007-S57 -- P/2007 H1, C/2007 G1, C/2006 OF2, 93P, 50P
415Kambah Obs. in Australia, 1 in MPEC 2007-S55 -- P/2007 R4
585Kiev Comet Station in the Ukraine, 6 in MPECs 2007-S51, 2007-S52, 2007-S53, 2007-S56 & 2007-S57 -- P/2007 S1, P/2007 R2, P/2007 R1, P/2007 Q2, 188P, 50P
400Kitami Obs. in Japan, 1 in MPEC 2007-S57 -- P/2007 N1
704LINEAR in New Mexico, 23 in MPECs 2007-S48, 2007-S49, 2007-S50, 2007-S51, 2007-S52, 2007-S53, 2007-S54 & 2007-S57 -- 2007 SU1, 2007 SG11, 2007 RT19, 2007 RR12, P/2007 R3, P/2007 R2, P/2007 R1, P/2007 Q2, C/2007 N3, P/2007 N1, 2007 LR32, C/2007 G1, C/2007 E1, C/2006 S5, 86324, 188P, 139P, 117P, 113P, 110P, 108P, 74P, 50P
699LONEOS in Arizona, 2 in MPEC 2007-S57 -- 136P, 117P
J67La Puebla de Vallbona Obs. in Spain, 2 in MPEC 2007-S57 -- C/2006 OF2, 93P
540Linz Obs. in Austria, 1 in MPEC 2007-S48 -- 2007 SU1
130Lumezzane Obs. in Italy, 2 in MPECs 2007-S50 & 2007-S57 -- C/2007 N3, P/2007 N1
560Madonna di Dossobuono Obs. in Italy, 2 in MPEC 2007-S48 -- 2003 SW222, 2001 QC34
J46Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2007-S57 -- C/2006 OF2
J45Montana Cabreja Obs. in the Canary Islands, 2 in MPEC 2007-S57 -- P/2007 H1, C/2006 OF2
945Monte Deva Obs. in Spain, 7 in MPEC 2007-S57 -- P/2007 H1, C/2006 U6, C/2006 OF2, 188P, 93P, 50P, 29P
900Moriyama Obs. in Japan, 1 in MPEC 2007-S57 -- 110P
G96Mt. Lemmon Survey in Arizona, 2 in MPECs 2007-S49 & 2007-S57 -- 2007 SG11, 156P
D81Nagano Obs., 3 in MPEC 2007-S57 -- C/2007 F1, 93P, 29P
J47Nazaret Obs. in Spain, 3 in MPEC 2007-S57 -- P/2007 H1, 93P, 50P
A24New Millennium Obs. in Italy, 2 in MPEC 2007-S57 -- C/2005 S4, 188P
423North Ryde Obs. in New South Wales, 2 in MPEC 2007-S57 -- C/2006 U6, C/2005 EL173
D29Purple Mtn. Obs. XuYi Station in China, 1 in MPEC 2007-S56 -- P/2007 S1
H06RAS Obs. Mayhill in New Mexico, 3 in MPEC 2007-S57 -- P/2007 H1, C/2006 S5, 110P
473Remanzacco Obs. in Italy, 2 in MPEC 2007-S57 -- P/2007 H1, C/2005 S4
H36Sandlot Obs. in Kansas, 1 in MPEC 2007-S49 -- 2007 SG11
204Schiaparelli Obs. in Italy, 8 in MPECs 2007-S54, 2007-S55 & 2007-S57 -- P/2007 R4, P/2007 R3, C/2007 F1, C/2006 U6, 188P, 136P, 117P, 93P
E12Siding Spring Survey in New South Wales, 8 in MPECs 2007-S48 & 2007-S57 -- 2007 SU1, 2007 SS1, 2007 SP6, 2007 SO6, 2007 RW17, 2007 RN7, 2007 PQ9, P/2007 H3
510Siegen Obs. in Germany, 8 in MPECs 2007-S48 & 2007-S57 -- C/2007 G1, C/2006 OF2, C/2005 L3, 86324, 93P, 50P, 17P, 8P
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2007-S51 & 2007-S54 -- P/2007 R3, P/2007 Q2
291Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2007-S48 -- 2007 SR1, 2007 SN6, 2007 DL41, 2006 SF6, 2003 UD22
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2007-S49 -- 2007 SG11
F85Tiki Obs. in Tahiti, 2 in MPEC 2007-S48 -- 2007 RS146, 2001 RC12
H47Vicksburg Obs. in Mississippi, 4 in MPEC 2007-S57 -- P/2007 H1, C/2005 S4, 188P, 93P
138Village-Neuf Obs. in France, 4 in MPEC 2007-S57 -- P/2007 H1, C/2006 S5, 93P, 50P
B42Vitebsk Obs. in Belarus, 15 in MPECs 2007-S50, 2007-S53 & 2007-S57 -- P/2007 R2, C/2007 N3, P/2007 N1, P/2007 H1, C/2007 G1, C/2006 S5, C/2006 OF2, 188P, 156P, 139P, 113P, 108P, 93P, 50P, 17P

Impact Risk Monitoring  on 25 September '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 1621 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 SN6JPL14162022-205923.3e-06-4.91-5.030JPL: "Analysis based on 18 observations spanning 5.0433 days (2007-Sep-19.28894 to 2007-Sep-24.33219)." Diameter approximately 0.035 km. from mean, weighted H=24.9.
NEODyS14162022-208543.83e-06-4.81-4.890NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2007/09/19.290 to 2007/09/24.333."
2007 RY19JPL14162024-2106406.5e-05-3.26-3.800JPL: "Analysis based on 40 observations spanning 10.813 days (2007-Sep-14.35284 to 2007-Sep-25.16566)." Diameter approximately 0.110 km. from mean, weighted H=22.5.

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 25 September '07

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

1622Grabbed MPEC 2007-S50 - Comet C/2007 N3 (Lulin) - see above
Grabbed MPEC 2007-S51 - Comet P/2007 Q2 (Gilmore) - see above
Grabbed MPEC 2007-S52 - Comet P/2007 R1 (Larson) - see above
Grabbed MPEC 2007-S53 - Comet P/2007 R2 (Gibbs) - see above
Grabbed MPEC 2007-S54 - Comet P/2007 R3 (Gibbs) - see above
Grabbed MPEC 2007-S55 - Comet P/2007 R4 (Garradd) - see above
Grabbed MPEC 2007-S56 - Comet P/2007 S1 (Zhao) - see above
Grabbed MPEC 2007-S57 - Observations of Comets - see above
1416Noted that JPL has updated its 2007 RY19 risk assessment - see above
Noted that JPL has updated its 2007 SN6 risk assessment - see above
Noted that NEODyS has updated its 2007 SN6 risk assessment - see above
Grabbed MPEC 2007-S48 - Daily Orbit Update - see above
Grabbed MPEC 2007-S49 - 2007 SG11 - see above