2008 TC3 at 0000 UTC on October 7th.

SpaceWeather.com is reporting from the University of Western Ontario that a Kenyan infrasound array picked up a 1.1- to 2.1-kiloton explosion over northeastern Africa at 0243 UTC today. JPL reported yesterday that "an atmospheric impact" was very likely to occur over northern Sudan by newly discovered tiny asteroid 2008 TC3 (see discovery MPEC yesterday). This A/CC graphic shows 2008 TC3 two and three-quarter hours before the event in a geocentric view, although, due its closeness to Earth, 2008 TC3's place in the sky would have appeared very differently depending on ones actual geographic location. We have news links here.


Contents  on 7 October '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 7 October '08

The MPC's NEO Confirmation Page has 2 listings: 2 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two updated listings. Of these, one was a "one nighter." So far The Tracking News has counted a total of eighteen objects listed on the NEOCP at some point today.

New MPECs  on 7 October '08

Minor Planet Electronic Circulars

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


MPEC 2008-T86 - "22:24 UT" - 2008 TF4


MPEC 2008-T85 - "22:22 UT" - 2008 TE4


MPEC 2008-T84 - "22:12 UT" - 2008 SO218


MPEC 2008-T83 - "21:59 UT" - 2008 TD4


MPEC 2008-T82 - "21:57 UT" - 2008 TC4


MPEC 2008-T81 - "21:54 UT" - 2008 TB4


MPEC 2008-T80 - "21:50 UT" - 2008 TA4


MPEC 2008-T79 - "21:46 UT" - 2008 TZ3


MPEC 2008-T78 - "21:38 UT" - 2008 TY3


MPEC 2008-T77 - "21:35 UT" - 2008 TX3


MPEC 2008-T76 - "12:39 UT" - 2004 TU11


<< DOU on 7 Oct. '08 >>  MPEC 2008-T75 - "06:10 UT" - Daily Orbit Update


MPEC 2008-T74 - "02:00 UT" - 2008 TC3


MPEC 2008-T73 - "01:44 UT" - 2008 TC3


MPEC 2008-T72 - "01:23 UT" - 2008 TC3


MPEC 2008-T71 - "01:09 UT" - 2008 TC3


MPEC 2008-T70 - "00:28 UT" - 2008 TC3


MPEC 2008-T69 - "00:00 UT" - 2008 TC3

Observers  on 7 October '08

A total of 35 observing facilities appear in today's MPECs.

CodeObserver / observatory
A86Albigneux Obs. in France, 1 in MPECs 2008-T69, 2008-T70 & 2008-T71 -- 2008 TC3
B37Ametlla del Valles Obs. in Spain, 9 in MPEC 2008-T75 -- 2008 RT, 2008 QY, 2008 QS11, 2001 UZ16, 138947, 7358, 3200, 2201, 1916
H55Astronomical Research Obs. (ARO) in Illinois, 28 in MPECs 2008-T75 & 2008-T84 -- 2008 TZ, 2008 TR2, 2008 TF, 2008 TD2, 2008 TC2, 2008 TB2, 2008 TA, 2008 SZ150, 2008 SY150, 2008 SW1, 2008 SV7, 2008 ST7, 2008 SR1, 2008 SQ7, 2008 SQ, 2008 SP7, 2008 SO218, 2008 SO, 2008 SH82, 2008 SF8, 2008 SE, 2008 SD85, 2008 RY24, 2008 RQ24, 2008 RE1, 2008 QZ, 2008 QT3, 2008 QC
703Catalina Sky Survey (CSS) in Arizona, 12 in MPECs 2008-T75, 2008-T81, 2008-T83, 2008-T84 & 2008-T85 -- 2008 TE4, 2008 TD4, 2008 TB4, 2008 SO218, 2008 SN1, 2004 TL19, 2003 GW, 1994 AW1, 85774, 39572, 189700, 2212
A77Chante-Perdrix Obs. in France, 1 in MPECs 2008-T69, 2008-T70, 2008-T71, 2008-T72 & 2008-T73 -- 2008 TC3
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2008-T84 -- 2008 SO218
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2008-T75 -- 2008 SQ
448Desert Moon Obs. in New Mexico, 1 in MPEC 2008-T84 -- 2008 SO218
J27El Guijo Obs. in Spain, 2 in MPEC 2008-T75 -- 190135, 1620
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 2 in MPECs 2008-T69 & 2008-T83 -- 2008 TD4, 2008 TC3
E10Faulkes Telescope South in New South Wales, 1 in MPEC 2008-T75 -- 2008 TZ
J95Great Shefford Obs. in England, 6 in MPECs 2008-T69, 2008-T70, 2008-T81, 2008-T82, 2008-T83, 2008-T85 & 2008-T86 -- 2008 TF4, 2008 TE4, 2008 TD4, 2008 TC4, 2008 TC3, 2008 TB4
701Junk Bond Obs. in Arizona, 1 in MPEC 2008-T84 -- 2008 SO218
704LINEAR in New Mexico, 12 in MPECs 2008-T75, 2008-T82, 2008-T84, 2008-T85 & 2008-T86 -- 2008 TF4, 2008 TE4, 2008 TC4, 2008 SU1, 2008 SQ1, 2008 SO218, 2008 SE, 2008 RE1, 2006 GZ, 85770, 185851, 2212
J75La Sagra Obs. in Spain, 1 in MPECs 2008-T70, 2008-T71 & 2008-T73 -- 2008 TC3
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2008-T84 -- 2008 SO218
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-T75 -- 2003 UL3
932McCarthy Obs. in Connecticut, 1 in MPEC 2008-T75 -- 2008 TC3
213Montcabre Obs. in Spain, 1 in MPECs 2008-T69 & 2008-T70 -- 2008 TC3
474Mt. John Obs. in New Zealand, 1 in MPEC 2008-T84 -- 2008 SO218
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2008-T75, 2008-T78, 2008-T79 & 2008-T84 -- 2008 TZ3, 2008 TY3, 2008 SO218, 2002 SS41, 96744
J47Nazaret Obs. in Spain, 1 in MPECs 2008-T69 & 2008-T70 -- 2008 TC3
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2008-T84 -- 2008 SO218
J53Posadas Obs. in Spain, 1 in MPECs 2008-T71 & 2008-T72 -- 2008 TC3
473Remanzacco Obs. in Italy, 1 in MPECs 2008-T69, 2008-T71, 2008-T72, 2008-T74 & 2008-T75 -- 2008 TC3
854Sabino Canyon Obs. in Arizona, 4 in MPECs 2008-T76, 2008-T77, 2008-T81 & 2008-T83 -- 2008 TX3, 2008 TD4, 2008 TB4, 2004 TU11
H36Sandlot Obs. in Kansas, 1 in MPEC 2008-T84 -- 2008 SO218
204Schiaparelli Obs. in Italy, 10 in MPECs 2008-T75 & 2008-T84 -- 2008 SZ150, 2008 SQ, 2008 SO218, 2008 QS11, 2008 MZ, 190491, 190135, 185851, 162900, 137032
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2008-T75 & 2008-T80 -- 2008 TA4, 5332
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2008-T75, 2008-T76 & 2008-T77 -- 2008 TX3, 2006 SU19, 2004 TU11, 162215
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2008-T75, 2008-T76, 2008-T77, 2008-T78, 2008-T79 & 2008-T84 -- 2008 TZ3, 2008 TY3, 2008 TX3, 2008 ST7, 2008 SO218, 2008 RK1, 2008 RJ1, 2008 RH1, 2004 TU11
611Starkenburg Obs. in Germany, 1 in MPEC 2008-T72 -- 2008 TC3
6735Jim Young via Table Mtn. Obs. in southern California, 5 in MPECs 2008-T76, 2008-T77, 2008-T78, 2008-T83 & 2008-T84 -- 2008 TY3, 2008 TX3, 2008 TD4, 2008 SO218, 2004 TU11
F85Tiki Obs. in Tahiti, 1 in MPEC 2008-T84 -- 2008 SO218
A55Vallemare di Borbona Obs. in Italy, 1 in MPEC 2008-T84 -- 2008 SO218
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 October '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 TD2JPL Sentry1455R E M O V E DJPL: Risk listing removed at 0852 UTC.
NEODyS1455R E M O V E D-
2008 TC2JPL Sentry1455R E M O V E DJPL: Risk listing removed at 0855 UTC.
NEODyS1455R E M O V E D-
2008 SH82JPL Sentry14552043-208126.6e-07-4.52-4.520JPL: "Analysis based on 41 observations spanning 9.8636 days (2008-Sep-26.21299 to 2008-Oct-06.0766)." Diameter approximately 0.210 km. from mean, weighted H=21.0.
NEODyS14552043-208125.99e-07-4.60-4.600NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2008/09/26.214 to 2008/10/06.077."
2008 ST7JPL Sentry14552073-2107394.6e-05-4.22-4.710JPL: "Analysis based on 75 observations spanning 12.145 days (2008-Sep-24.29993 to 2008-Oct-06.44473)." Diameter approximately 0.051 km. from mean, weighted H=24.1.
NEODyS14552073-208972.47e-06-5.34-5.650NEODyS: "Based on 81 optical observations (of which 6 are rejected as outliers) from 2008/09/24.301 to 2008/10/06.445."

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 7 October '08

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

2305Grabbed MPEC 2008-T77 - 2008 TX3 - see above
Grabbed MPEC 2008-T78 - 2008 TY3 - see above
Grabbed MPEC 2008-T79 - 2008 TZ3 - see above
Grabbed MPEC 2008-T80 - 2008 TA4 - see above
Grabbed MPEC 2008-T81 - 2008 TB4 - see above
Grabbed MPEC 2008-T82 - 2008 TC4 - see above
Grabbed MPEC 2008-T83 - 2008 TD4 - see above
Grabbed MPEC 2008-T84 - 2008 SO218 - see above
Grabbed MPEC 2008-T85 - 2008 TE4 - see above
Grabbed MPEC 2008-T86 - 2008 TF4 - see above
1455Noted that JPL Sentry has updated its 2008 SH82 risk assessment - see above
Noted that NEODyS has updated its 2008 SH82 risk assessment - see above
Noted that JPL Sentry has updated its 2008 ST7 risk assessment - see above
Noted that NEODyS has updated its 2008 ST7 risk assessment - see above
Noted that JPL Sentry has removed 2008 TC2 as an impact risk - see above
Noted that NEODyS has removed 2008 TC2 as an impact risk - see above
Noted that JPL Sentry has removed 2008 TD2 as an impact risk - see above
Noted that NEODyS has removed 2008 TD2 as an impact risk - see above
Grabbed MPEC 2008-T75 - Daily Orbit Update - see above
Grabbed MPEC 2008-T76 - 2004 TU11 - see above
0213Grabbed MPEC 2008-T73 - 2008 TC3 - see above
Grabbed MPEC 2008-T74 - 2008 TC3 - see above
0144Grabbed MPEC 2008-T71 - 2008 TC3 - see above
Grabbed MPEC 2008-T72 - 2008 TC3 - see above
0058Grabbed MPEC 2008-T70 - 2008 TC3 - see above
0026Grabbed MPEC 2008-T69 - 2008 TC3 - see above