Contents  on 25 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 25 September '08

The MPC's NEO Confirmation Page has 4 listings: 1 new, 3 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and three updated listings. All of these were "one nighters." So far The Tracking News has counted a total of eighteen 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 '08

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been twelve MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-S61 - "23:12 UT" - 2008 RM98


MPEC 2008-S60 - "21:20 UT" - 2008 SF8


MPEC 2008-S59 - "20:40 UT" - 2008 QY


MPEC 2008-S58 - "19:52 UT" - 2008 SW7


MPEC 2008-S57 - "18:56 UT" - 2008 SV7


MPEC 2008-S56 - "17:43 UT" - 2008 ST7


MPEC 2008-S55 - "17:39 UT" - 2008 SS7


MPEC 2008-S54 - "17:26 UT" - 2008 SR7


MPEC 2008-S53 - "17:17 UT" - 2008 SQ7


MPEC 2008-S52 - "17:13 UT" - 2008 SP7


<< DOU on 25 Sept. '08 >>  MPEC 2008-S51 - "06:08 UT" - Daily Orbit Update


MPEC 2008-S50 - "04:38 UT" - 2008 SQ1

Observers  on 25 September '08

A total of 26 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 16 in MPECs 2008-S51, 2008-S54, 2008-S55, 2008-S56, 2008-S57 & 2008-S59 -- 2008 SV7, 2008 ST7, 2008 ST, 2008 SS7, 2008 SS, 2008 SR7, 2008 SQ, 2008 SP, 2008 SA, 2008 RT, 2008 RH1, 2008 QY, 2008 QU3, 2008 QT3, 2008 PE1, 2007 AT2
B09Capannoli Obs. in Italy, 2 in MPEC 2008-S51 -- 2008 SQ1, 2008 SE
703Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2008-S51, 2008-S54 & 2008-S57 -- 2008 SV7, 2008 SR7, 2008 SN1, 2008 SE, 2008 NU, 2005 TZ51, 2005 BC, 2004 HE12, 162900, 141851, 137799
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2008-S54 -- 2008 SR7
448Desert Moon Obs. in New Mexico, 2 in MPECs 2008-S52 & 2008-S54 -- 2008 SR7, 2008 SP7
J27El Guijo Obs. in Spain, 2 in MPEC 2008-S51 -- 2003 GW, 2001 SK9
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2008-S54 -- 2008 SR7
E10Faulkes Telescope South in New South Wales, 1 in MPEC 2008-S61 -- 2008 RM98
683Goodricke-Pigott Obs. in Arizona, 2 in MPECs 2008-S51 & 2008-S52 -- 2008 SP7, 1627
651Grasslands Obs. in Arizona, 1 in MPEC 2008-S54 -- 2008 SR7
J95Great Shefford Obs. in England, 1 in MPEC 2008-S60 -- 2008 SF8
682Kanab Obs. in Utah, 1 in MPEC 2008-S51 -- 2008 SU1
704LINEAR in New Mexico, 12 in MPECs 2008-S51, 2008-S53 & 2008-S58 -- 2008 SW7, 2008 SW1, 2008 SQ7, 2008 SQ, 2008 SO, 2005 RD34, 2004 XN44, 90075, 65996, 65733, 155140, 7888
699LONEOS in Arizona, 1 in MPEC 2008-S50 -- 2008 SQ1
J40Malaga Obs. in Spain, 1 in MPEC 2008-S51 -- 2008 SR1
474Mt. John Obs. in New Zealand, 8 in MPECs 2008-S51, 2008-S52, 2008-S53, 2008-S55, 2008-S56, 2008-S60 & 2008-S61 -- 2008 ST7, 2008 SS7, 2008 SS, 2008 SQ7, 2008 SP7, 2008 SF8, 2008 RS26, 2008 RM98
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2008-S51, 2008-S52, 2008-S53, 2008-S54, 2008-S55, 2008-S56, 2008-S57, 2008-S60 & 2008-S61 -- 2008 SV7, 2008 ST7, 2008 SS7, 2008 SR7, 2008 SQ7, 2008 SP7, 2008 SF8, 2008 RM98, 162900, 162825, 138847, 4183
261&Rob Matson in southern California using the Palomar Digitized Sky Survey in southern California, 1 in MPEC 2008-S59 -- 2008 QY
473Remanzacco Obs. in Italy, 1 in MPEC 2008-S54 -- 2008 SR7
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-S53 -- 2008 SQ7
H36Sandlot Obs. in Kansas, 2 in MPECs 2008-S54 & 2008-S55 -- 2008 SS7, 2008 SR7
204Schiaparelli Obs. in Italy, 8 in MPEC 2008-S51 -- 2008 SR1, 2008 RW24, 1998 SJ70, 87684, 144901, 105140, 4257, 1620
E12Siding Spring Survey in New South Wales, 1 in MPEC 2008-S51 -- 887
691Spacewatch 0.9m telescope in Arizona, 7 in MPECs 2008-S50 & 2008-S51 -- 2008 SQ1, 2008 RE1, 2008 PL3, 2005 VY17, 88188, 191094, 154991
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2008-S51, 2008-S54, 2008-S55, 2008-S56 & 2008-S59 -- 2008 SU1, 2008 ST7, 2008 SS7, 2008 SR7, 2008 QY, 2007 TA19, 2006 WH1, 2005 VC, 2003 WD158
H83Timberlake Obs. in Virginia, 2 in MPEC 2008-S51 -- 2002 VV17, 162911
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 25 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 ST7JPL Sentry20252030-21081567.5e-05-3.96-4.720JPL: "Analysis based on 29 observations spanning 1.2281 days (2008-Sep-24.29993 to 2008-Sep-25.52801)." Diameter approximately 0.054 km. from mean, weighted H=24.0.
2008 SU1JPL Sentry1514R E M O V E DJPL: Risk listing removed at 0852 UTC.
NEODyS1514R E M O V E D-
2008 STJPL Sentry15142043-2107335.3e-05-5.64-6.280JPL: "Analysis based on 27 observations spanning 1.9262 days (2008-Sep-22.16113 to 2008-Sep-24.08737)." Diameter approximately 0.013 km. from mean, weighted H=27.1.
NEODyS15142052-2080102.66e-05-5.87-6.300NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2008/09/22.162 to 2008/09/24.088."

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 25 September '08

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

2358Grabbed MPEC 2008-S61 - 2008 RM98 - see above
2133Grabbed MPEC 2008-S60 - 2008 SF8 - see above
2045Grabbed MPEC 2008-S59 - 2008 QY - see above
2025Noted that JPL Sentry has posted 2008 ST7 as an impact risk - see above
1957Grabbed MPEC 2008-S58 - 2008 SW7 - see above
1928Grabbed MPEC 2008-S57 - 2008 SV7 - see above
1746Grabbed MPEC 2008-S53 - 2008 SQ7 - see above
Grabbed MPEC 2008-S54 - 2008 SR7 - see above
Grabbed MPEC 2008-S55 - 2008 SS7 - see above
Grabbed MPEC 2008-S56 - 2008 ST7 - see above
1745Grabbed MPEC 2008-S52 - 2008 SP7 - see above
1514Noted that JPL Sentry has updated its 2008 ST risk assessment - see above
Noted that NEODyS has updated its 2008 ST risk assessment - see above
Noted that JPL Sentry has removed 2008 SU1 as an impact risk - see above
Noted that NEODyS has removed 2008 SU1 as an impact risk - see above
Grabbed MPEC 2008-S51 - Daily Orbit Update - see above
0541Grabbed MPEC 2008-S50 - 2008 SQ1 - see above