Contents  on 26 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 26 September '08

The MPC's NEO Confirmation Page has 5 listings: 1 new, 4 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and four updated listings. Of these, four were "one nighters." So far The Tracking News has counted a total of nine 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 26 September '08

Minor Planet Electronic Circulars

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


MPEC 2008-S68 - "22:21 UT" - Comets C/2008 N8, 2008 N9, 2008 N10, 2008 N11, 2008 O5 (SOHO)


MPEC 2008-S67 - "19:49 UT" - Comets C/2008 N6, 2008 N7, 2008 O4, 2008 R7 (SOHO)


MPEC 2008-S66 - "17:26 UT" - 2008 SW11


MPEC 2008-S65 - "17:16 UT" - 2008 SV11


MPEC 2008-S64 - "15:27 UT" - 2008 SX7


<< DOU on 26 Sept. '08 >>  MPEC 2008-S63 - "06:08 UT" - Daily Orbit Update


MPEC 2008-S62 - "03:50 UT" - 2007 TQ436, 2007 TR436

Observers  on 26 September '08

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

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 22 in MPECs 2008-S63, 2008-S65 & 2008-S66 -- 2008 SZ1, 2008 SW11, 2008 SW1, 2008 SV11, 2008 SU1, 2008 SS, 2008 SR1, 2008 SR, 2008 SQ, 2008 SP, 2008 SN1, 2008 RX24, 2008 RJ1, 2008 RH1, 2008 RE80, 2008 QU3, 2008 QD1, 2008 ON, 2008 OB9, 2008 MH1, 2008 JZ7, 2002 XP40
A81Balzaretto Obs. in Italy, 2 in MPEC 2008-S63 -- 2008 SR1, 164400
I77CEAMIG-REA in Brazil, 1 in MPEC 2008-S63 -- 2008 QS11
807Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPEC 2008-S62 -- 2007 TR436, 2007 TQ436
448Desert Moon Obs. in New Mexico, 3 in MPEC 2008-S63 -- 2008 RG98, 2008 QD1, 138947
E10Faulkes Telescope South in New South Wales, 2 in MPECs 2008-S63 & 2008-S65 -- 2008 SV11, 2008 QS11
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-S63 -- 1627
J95Great Shefford Obs. in England, 1 in MPEC 2008-S66 -- 2008 SW11
B34Green Island Obs. in Cyprus, 1 in MPEC 2008-S63 -- 2003 GW
682Kanab Obs. in Utah, 1 in MPEC 2008-S63 -- 2008 SP7
704LINEAR in New Mexico, 1 in MPEC 2008-S63 -- 2008 SZ1
568Mauna Kea in Hawaii, 2 in MPEC 2008-S62 -- 2007 TR436, 2007 TQ436
474Mt. John Obs. in New Zealand, 2 in MPECs 2008-S65 & 2008-S66 -- 2008 SW11, 2008 SV11
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2008-S63 & 2008-S65 -- 2008 SV11, 65733, 108906
J93Mt. Tuffley Obs. in England, 5 in MPEC 2008-S63 -- 185851, 16960, 164400, 8567, 1627
J69North Obs. in England, 1 in MPEC 2008-S63 -- 2008 SA
E09Oakley Southern Sky Obs. in New South Wales, 1 in MPEC 2008-S63 -- 2008 QS11
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2008-S63 -- 2008 SR1, 2008 SQ1, 2008 SE, 2002 SS41, 1998 SJ70
649Powell Obs. in Kansas, 1 in MPEC 2008-S66 -- 2008 SW11
C495COR2-A instrument (5) aboard STEREO-A in heliocentric orbit leading Earth, 1 in MPEC 2008-S67 -- C/2008 R7
E12Siding Spring Survey (SSS) in New South Wales, 7 in MPECs 2008-S63 & 2008-S64 -- 2008 SX7, 2008 SS, 2008 SR1, 2008 SD, 2008 SC, 2008 QS11, 1998 WZ6
2492LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 7 in MPECs 2008-S67 & 2008-S68 -- C/2008 R7, C/2008 O5, C/2008 O4, C/2008 N8, C/2008 N7, C/2008 N6, C/2008 N10
2493LASCO Coronagraph 3 (SOHO C3) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 6 in MPECs 2008-S67 & 2008-S68 -- C/2008 R7, C/2008 O5, C/2008 N9, C/2008 N8, C/2008 N6, C/2008 N11
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2008-S63 & 2008-S66 -- 2008 SW11, 2005 TR15
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2008-S63, 2008-S65 & 2008-S66 -- 2008 SW11, 2008 SV11, 2005 VC
A98Taurus-1 Obs. in Belarus, 3 in MPEC 2008-S63 -- 185851, 8567, 1620
A48Verona Obs. in Italy, 3 in MPEC 2008-S63 -- 2008 SA, 2008 MU1, 2005 RC34
H47Vicksburg Obs. in Mississippi, 2 in MPEC 2008-S63 -- 2005 TZ51, 39572
B42Vitebsk Obs. in Belarus, 1 in MPEC 2008-S63 -- 8567
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 September '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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 SV11JPL Sentry21012014-21085135.9e-07-2.71-3.870JPL: "Analysis based on 25 observations spanning .99767 days (2008-Sep-25.26245 to 2008-Sep-26.26012)." Diameter approximately 0.729 km. from mean, weighted H=18.3.
2008 ST7NEODyS14582050-2090311.42e-05-4.63-5.310NEODyS: "Based on 32 optical observations (of which 6 are rejected as outliers) from 2008/09/24.301 to 2008/09/25.529."
2008 RM98NEODyS1458208517.62e-08-5.12-5.120NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2008/09/07.322 to 2008/09/25.645."
JPL Sentry01232085-210333.9e-09-6.22-6.260JPL: "Analysis based on 26 observations spanning 18.323 days (2008-Sep-07.32138 to 2008-Sep-25.64404)." Diameter approximately 0.362 km. from mean, weighted H=19.9.

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 26 September '08

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

2302Grabbed MPEC 2008-S68 - Comets C/2008 N8, 2008 N9, 2008 N10, 2008 N11, 2008 O5 (SOHO) - see above
2101Noted that JPL Sentry has posted 2008 SV11 as an impact risk - see above
Grabbed MPEC 2008-S67 - Comets C/2008 N6, 2008 N7, 2008 O4, 2008 R7 (SOHO) - see above
1933Grabbed MPEC 2008-S65 - 2008 SV11 - see above
Grabbed MPEC 2008-S66 - 2008 SW11 - see above
1631Grabbed MPEC 2008-S64 - 2008 SX7 - see above
1458Grabbed MPEC 2008-S63 - Daily Orbit Update - see above
1457Noted that NEODyS has posted 2008 RM98 as an impact risk - see above
Noted that NEODyS has posted 2008 ST7 as an impact risk - see above
0359Grabbed MPEC 2008-S62 - 2007 TQ436, 2007 TR436 - see above
0123Noted that JPL Sentry has posted 2008 RM98 as an impact risk - see above