Contents  on 24 September '08

Resources:

The latest A/CC news is available via framed access, RSS news feed RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.

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 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 24 September '08

The MPC's NEO Confirmation Page has 12 listings: 4 new, 8 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and eight updated listings. Of these, eleven were "one nighters." The Tracking News counted a total of 22 objects listed on the NEOCP at some point on this day.

New MPECs  on 24 September '08

Minor Planet Electronic Circulars

There were twelve MPECs issued this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-S49 - "23:03 UT" - Comet C/1999 X3 = 2004 E2 = 2008 K10 (SOHO)


MPEC 2008-S48 - "17:48 UT" - Comet P/2008 QP20 (Linear-Hill)


MPEC 2008-S47 - "16:45 UT" - Comet 205P/Giacobini


MPEC 2008-S46 - "15:29 UT" - Comet P/2008 R1 (Garradd)


<< DOU on 24 Sept. '08 >>  MPEC 2008-S45 - "06:06 UT" - Daily Orbit Update


MPEC 2008-S44 - "04:18 UT" - 2008 SZ1


MPEC 2008-S43 - "01:58 UT" - 2008 SW1


MPEC 2008-S42 - "01:50 UT" - 2008 SU1


MPEC 2008-S41 - "01:44 UT" - 2008 ST1


MPEC 2008-S40 - "00:54 UT" - 2008 SR1


MPEC 2008-S39 - "00:48 UT" - 2008 SQ1


MPEC 2008-S38 - "00:44 UT" - 2008 SO1

Observers  on 24 September '08

A total of 48 observing facilities appeared in this day's MPECs.

CodeObserver / observatory
J20Aravaca Obs., 1 in MPEC 2008-S47 -- 205P
H55Astronomical Research Obs. (ARO) in Illinois, 17 in MPECs 2008-S39, 2008-S42, 2008-S43, 2008-S44, 2008-S45 & 2008-S48 -- 2008 SZ1, 2008 SW1, 2008 SU1, 2008 SQ1, 2008 SP, 2008 SO, 2008 SE, 2008 RZ24, 2008 RY24, 2008 RH1, 2008 RG1, 2008 RE80, P/2008 QP20, 2008 OB9, 2008 MZ, 2004 HE12, 2003 OB4
467Auckland Obs. in New Zealand, 1 in MPEC 2008-S47 -- 205P
197Bastia Obs. in Italy, 1 in MPEC 2008-S40 -- 2008 SR1
I77CEAMIG-REA in Brazil, 1 in MPEC 2008-S45 -- 2008 SR1
J79Calarreona Obs. in Spain, 1 in MPEC 2008-S47 -- 205P
B09Capannoli Obs. in Italy, 1 in MPEC 2008-S39 -- 2008 SQ1
703Catalina Sky Survey (CSS) in Arizona, 25 in MPECs 2008-S39, 2008-S42, 2008-S43, 2008-S44, 2008-S45 & 2008-S48 -- 2008 SZ1, 2008 SW1, 2008 SU1, 2008 SQ1, P/2008 QP20, 2005 BC, 2002 SS41, 2001 SG10, 1994 AW1, 90075, 190135, 189552, 185851, 162186, 162149, 155140, 138847, 12538, 11500, 5143, 4450, 4257, 4183, 3752, 1865
J65Celbridge Obs. in Ireland, 3 in MPECs 2008-S39, 2008-S42 & 2008-S45 -- 2008 SU1, 2008 SQ1, 2008 SN1
850Cordell-Lorenz Obs. in Tennessee, 3 in MPECs 2008-S39, 2008-S47 & 2008-S48 -- 2008 SQ1, P/2008 QP20, 205P
448Desert Moon Obs. in New Mexico, 3 in MPEC 2008-S45 -- 2008 RH1, 2008 RE80, 2007 SR1
151Eschenberg Obs. in Switzerland, 2 in MPEC 2008-S45 -- 2003 GW, 2001 SQ3
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2008-S40 -- 2008 SR1
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-S45 -- 1627
651Grasslands Obs. in Arizona, 1 in MPEC 2008-S48 -- P/2008 QP20
J95Great Shefford Obs. in England, 2 in MPECs 2008-S40 & 2008-S47 -- 2008 SR1, 205P
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2008-S40 -- 2008 SR1
379Hamamatsu-Yuto Obs. in Japan, 3 in MPECs 2008-S45 & 2008-S47 -- 2003 GW, 164400, 205P
F84Hibiscus Obs. in Tahiti, 1 in MPEC 2008-S46 -- P/2008 R1
D88Hiratsuka Obs., 1 in MPEC 2008-S47 -- 205P
415Kambah Obs. in the Australian Capital Territory, 1 in MPEC 2008-S46 -- P/2008 R1
J66Kinver Obs. in England, 1 in MPEC 2008-S39 -- 2008 SQ1
352Konan Obs. in Japan, 1 in MPEC 2008-S47 -- 205P
704LINEAR in New Mexico, 14 in MPECs 2008-S41 & 2008-S45 -- 2008 ST1, 2001 SG276, 2001 QL153, 1999 RJ27, 1998 SO, 96744, 162635, 9856, 8567, 7888, 5011, 3352, 1620, 887
J87La Canada Obs. in Spain, 1 in MPEC 2008-S47 -- 205P
J40Malaga Obs. in Spain, 1 in MPEC 2008-S47 -- 205P
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2008-S45 -- 2008 RY24, 7888
900Moriyama Obs. in Japan, 2 in MPECs 2008-S47 & 2008-S48 -- P/2008 QP20, 205P
474Mt. John Obs. in New Zealand, 1 in MPEC 2008-S48 -- P/2008 QP20
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2008-S38, 2008-S45 & 2008-S48 -- 2008 SQ, 2008 SO1, 2008 RE80, P/2008 QP20, 2007 YJ, 190208, 162635, 137799, 106589
A13Naef Obs. in Switzerland, 4 in MPECs 2008-S39, 2008-S43, 2008-S45 & 2008-S48 -- 2008 SW1, 2008 SQ1, 2008 SN1, P/2008 QP20
J47Nazaret Obs. in Spain, 3 in MPECs 2008-S45, 2008-S47 & 2008-S48 -- 2008 SR1, P/2008 QP20, 205P
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2008-S45 -- 2008 SQ, 2008 SE, 2008 MR1
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2008-S48 -- P/2008 QP20
H06%E. Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2008-S39 -- 2008 SQ1
D90*Rolando Ligustri in Italy via RAS Obs. Moorook in South Australia, 1 in MPEC 2008-S40 -- 2008 SR1
619Sabadell Obs. in Spain, 1 in MPEC 2008-S45 -- 8567
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2008-S39, 2008-S42 & 2008-S44 -- 2008 SZ1, 2008 SU1, 2008 SQ1
H36Sandlot Obs. in Kansas, 2 in MPEC 2008-S45 -- 2008 SE, 2005 TR15
E12Siding Spring Survey (SSS) in New South Wales, 5 in MPECs 2008-S40, 2008-S45 & 2008-S46 -- 2008 SS, 2008 SR1, P/2008 R1, 140288, 102873
691Spacewatch 0.9m telescope in Arizona, 11 in MPECs 2008-S43 & 2008-S45 -- 2008 SW1, 2008 RQ24, 2008 RK1, 2008 RJ1, 2008 RG98, 2008 QF, 2006 TN, 2001 CK42, 38239, 190491, 137044
291Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2008-S45 -- 2008 SR, 2008 RH1, 2008 QF, 2007 AT2, 2005 PO, 2003 YG118, 2003 WD158
H67Stonegate Obs. in Michigan, 2 in MPEC 2008-S45 -- 2008 SQ1, 164400
673Table Mtn. Obs. in southern California, 1 in MPEC 2008-S47 -- 205P
6735Jim Young via Table Mtn. Obs. in southern California, 3 in MPECs 2008-S39, 2008-S43 & 2008-S44 -- 2008 SZ1, 2008 SW1, 2008 SQ1
A98Taurus-1 Obs. in Belarus, 4 in MPEC 2008-S45 -- 185851, 16960, 8567, 1620
F85Tiki Obs. in Tahiti, 1 in MPEC 2008-S44 -- 2008 SZ1
H47Vicksburg Obs. in Mississippi, 4 in MPECs 2008-S45 & 2008-S47 -- 189700, 164400, 4179, 205P
B42Vitebsk Obs. in Belarus, 1 in MPEC 2008-S45 -- 164400
367Yatsuka Obs., 1 in MPEC 2008-S47 -- 205P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 September '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
Note that the time horizon for JPL is 100 years from today and for NEODyS is 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
2008 SU1NEODyS12002046-2090151.32e-08-4.88-4.920NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2008/09/23.189 to 2008/09/23.956."
JPL Sentry04362046-2096214.6e-08-4.42-4.850JPL: "Analysis based on 20 observations spanning .76697 days (2008-Sep-23.18852 to 2008-Sep-23.95549)." Diameter approximately 0.446 km. from mean, weighted H=19.4.

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 a variant 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" to learn more.

Chronology  on 24 September '08

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

2358Grabbed MPEC 2008-S49 - Comet C/1999 X3 = 2004 E2 = 2008 K10 (SOHO) - see above
1903Grabbed MPEC 2008-S48 - Comet P/2008 QP20 (Linear-Hill) - see above
1719Grabbed MPEC 2008-S46 - Comet P/2008 R1 (Garradd) - see above
Grabbed MPEC 2008-S47 - Comet 205P/Giacobini - see above
1200Noted that NEODyS has posted 2008 SU1 as an impact risk - see above
Grabbed MPEC 2008-S45 - Daily Orbit Update - see above
0436Noted that JPL Sentry has posted 2008 SU1 as an impact risk - see above
Grabbed MPEC 2008-S44 - 2008 SZ1 - see above
0201Grabbed MPEC 2008-S41 - 2008 ST1 - see above
Grabbed MPEC 2008-S42 - 2008 SU1 - see above
Grabbed MPEC 2008-S43 - 2008 SW1 - see above
0122Grabbed MPEC 2008-S38 - 2008 SO1 - see above
Grabbed MPEC 2008-S39 - 2008 SQ1 - see above
Grabbed MPEC 2008-S40 - 2008 SR1 - see above