Contents  on 22 October '08


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 22 October '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. Of these, three were "one nighters." So far The Tracking News has counted a total of eleven 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 22 October '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-U39 - "19:29 UT" - 2008 UF1

MPEC 2008-U38 - "19:27 UT" - 2008 UE1

MPEC 2008-U37 - "19:24 UT" - 2008 UD1

<< DOU on 22 Oct. '08 >>  MPEC 2008-U36 - "06:11 UT" - Daily Orbit Update

MPEC 2008-U35 - "02:09 UT" - 2008 UX

MPEC 2008-U34 - "01:36 UT" - 2008 UV

MPEC 2008-U33 - "01:33 UT" - 2008 UU

Observers  on 22 October '08

Seventeen observing facilities appear in today's MPECs.

CodeObserver / observatory
A44Altschwendt Obs. in Austria, 1 in MPEC 2008-U36 -- 2008 TV26
H55Astronomical Research Obs. (ARO) in Illinois, 12 in MPEC 2008-U36 -- 2008 TZ3, 2008 TY9, 2008 TX3, 2008 TR2, 2008 TF4, 2008 TD2, 2008 SZ1, 2008 SW1, 2008 SU150, 2008 SQ7, 2008 SP7, 2008 RJ1
106Crni Vrh Obs. in Slovenia, 2 in MPEC 2008-U36 -- 2001 TW1, 4183
E10Faulkes Telescope South in New South Wales, 1 in MPEC 2008-U36 -- 2008 TV25
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-U36 -- 9856
J95Great Shefford Obs. in England, 5 in MPECs 2008-U33, 2008-U34, 2008-U35 & 2008-U36 -- 2008 UX, 2008 UV, 2008 UU, 2008 TT26, 2008 SS251
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2008-U33, 2008-U34, 2008-U35, 2008-U36, 2008-U37, 2008-U38 & 2008-U39 -- 2008 UX, 2008 UV, 2008 UU, 2008 UF1, 2008 UE1, 2008 UD1, 2001 TC, 2000 YO29, 2000 JQ3, 54071, 162825, 4183
J93Mt. Tuffley Obs. in England, 1 in MPEC 2008-U36 -- 16960
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 8 in MPEC 2008-U36 -- 2008 TT26, 2008 TC4, 2008 SQ1, 2008 SQ, 2008 PL3, 2001 UZ16, 1994 AW1, 39572
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-U35 -- 2008 UX
E12Siding Spring Survey in New South Wales, 1 in MPEC 2008-U36 -- 2008 UC
691Spacewatch 0.9m telescope in Arizona, 8 in MPEC 2008-U36 -- 2007 YJ, 2005 TR15, 2003 SG170, 2001 SG276, 162215, 159923, 155110, 2212
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2008-U36, 2008-U37 & 2008-U38 -- 2008 UE1, 2008 UD1, 2008 TZ3, 2008 TY3, 2008 TD27, 2008 SW1, 2008 RJ1, 2008 QW11, 2004 TU11
A97Stammersdorf Obs. in Austria, 1 in MPEC 2008-U36 -- 2008 TT26
H83Timberlake Obs. in Virginia, 1 in MPEC 2008-U36 -- 11500
A55Vallemare di Borbona Obs. in Italy, 1 in MPEC 2008-U36 -- 2008 TT26
198Wildberg Obs. in Germany, 1 in MPEC 2008-U36 -- 2008 TV26
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 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.





Notes for Today's Latest Risk Assessments
2008 UF1JPL Sentry21232050-207824.6e-08-7.48-7.650JPL: "Analysis based on 23 observations spanning .13242 days (2008-Oct-22.32334 to 2008-Oct-22.45576)." Diameter approximately 0.023 km. from mean, weighted H=25.8.
2008 USNEODyS14542010-2080552.32e-05-6.53-6.830NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/10/21.355 to 2008/10/21.436."
2008 UCJPL Sentry14542038-2105141.3e-08-5.05-5.570JPL: "Analysis based on 13 observations spanning 1.0124 days (2008-Oct-19.54688 to 2008-Oct-20.55929)." Diameter approximately 0.570 km. from mean, weighted H=18.8.
NEODyS14542021-2088125.24e-09-5.20-5.770NEODyS: "Based on 13 optical observations (of which 1 are rejected as outliers) from 2008/10/19.548 to 2008/10/20.560."

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 22 October '08

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

2123Noted that JPL Sentry has posted 2008 UF1 as an impact risk - see above
Grabbed MPEC 2008-U37 - 2008 UD1 - see above
Grabbed MPEC 2008-U38 - 2008 UE1 - see above
Grabbed MPEC 2008-U39 - 2008 UF1 - see above
1454Noted that JPL Sentry has updated its 2008 UC risk assessment - see above
Noted that NEODyS has updated its 2008 UC risk assessment - see above
Noted that NEODyS has posted 2008 US as an impact risk - see above
Grabbed MPEC 2008-U36 - Daily Orbit Update - see above
0259Grabbed MPEC 2008-U35 - 2008 UX - see above
0200Grabbed MPEC 2008-U33 - 2008 UU - see above
Grabbed MPEC 2008-U34 - 2008 UV - see above