Contents  on 18 October '11


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 18 October '11

The MPC's NEO Confirmation Page has 19 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had nineteen objects listed. Of these, sixteen were "one nighters." So far The Tracking News has counted a total of 25 listings on the NEOCP today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 18 October '11

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been three MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2011-U13 - "16:59 UT" - 2011 UU

MPEC 2011-U12 - "16:57 UT" - 2011 UT

<< DOU on 18 Oct. '11 >>  MPEC 2011-U11 - "06:02 UT" - Daily Orbit Update

Observers  on 18 October '11

A total of 25 observers appear in today's MPECs.

CodeObserver / observatory
H077300 Obs. in New Mexico, 1 in MPEC 2011-U11 -- 2011 QY37
B03Alter Satzberg Obs. in Austria, 2 in MPEC 2011-U11 -- 2011 UA, 2011 TN9
160Castelmartini Obs. in Italy, 2 in MPEC 2011-U11 -- 2011 TA4, 2011 HC36
703Catalina Sky Survey (CSS) in Arizona, 3 in MPEC 2011-U11 -- 2011 KF4, 163081, 137799
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPEC 2011-U11 -- 2011 UA, 2011 TN9, 2011 SO26
448Desert Moon Obs. in New Mexico, 6 in MPEC 2011-U11 -- 2011 TL5, 2011 SR69, 2011 SO32, 2011 QZ13, 2011 OL51, 2006 SX217
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2011-U11 -- 2011 UD
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2011-U11 -- 2011 SQ12, 2011 KF4
246KLENOT in the Czech Republic, 1 in MPEC 2011-U11 -- 2011 UA
046Klet Obs. in the Czech Republic, 6 in MPEC 2011-U11 -- 2011 UA, 2011 TN9, 2011 TG2, 2011 TA4, 2011 SQ12, 2011 OQ5
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2011-U11 -- 2011 QF48
118Modra Obs. in Slovakia, 1 in MPEC 2011-U12 -- 2011 UT
A24New Millennium Obs. in Italy, 13 in MPEC 2011-U11 -- 2011 OV4, 2011 KN9, 2011 HC36, 2006 SV134, 2004 SV55, 2000 SH8, 85804, 37336, 276274, 275545, 20086, 16960, 159399
A53Peschiera del Garda Obs. in Italy, 2 in MPEC 2011-U11 -- 2011 TN9, 2011 TA4
D29Purple Mtn. Obs. Xuyi Station in China, 3 in MPEC 2011-U11 -- 2011 KF4, 96744, 137799
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2011-U12 & 2011-U13 -- 2011 UU, 2011 UT
104San Marcello Pistoiese Obs. in Italy, 2 in MPEC 2011-U11 -- 2011 SO25, 2011 OQ5
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-U11 -- 2011 TN9
204Schiaparelli Obs. in Italy, 1 in MPEC 2011-U13 -- 2011 UU
691Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2011-U11, 2011-U12 & 2011-U13 -- 2011 UU, 2011 UT, 2011 SP68, 2011 SO25, 163081, 137799
291Spacewatch 1.8m telescope in Arizona, 16 in MPECs 2011-U11, 2011-U12 & 2011-U13 -- 2011 UU, 2011 UT, 2011 TK5, 2011 TA4, 2011 SU68, 2011 SS67, 2011 SR12, 2011 SH189, 2011 SG16, 2011 SF108, 2011 RZ, 2011 RX, 2011 QF3, 2010 OC103, 2004 VB, 1994 RC
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2011-U11 & 2011-U12 -- 2011 UT, 2011 UD
A48Verona Obs. in Italy, 2 in MPEC 2011-U11 -- 2011 TN9, 2011 SR69
G56Walnut Creek Obs. in northern California, 4 in MPEC 2011-U11 -- 2011 TN9, 2011 TA4, 2011 QZ13, 154275
I15Wishing Star Obs. in Rhode Island, 6 in MPEC 2011-U11 -- 2011 UA, 2011 TG2, 2011 TA4, 2011 SQ12, 2011 OV4, 2005 NX44
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 18 October '11

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.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON risk pages.





Notes for Today's Latest Risk Assessments
2011 UTJPL Sentry21322034-2110157.4e-06-5.87-6.180JPL: "Analysis based on 18 observations spanning 1.0415 days (2011-Oct-17.41107 to 2011-Oct-18.45254)." Diameter approximately 0.023 km. from mean, weighted H=25.9.
2011 QF48JPL Sentry1503206712.8e-07-6.50-6.500JPL: "Analysis based on 45 observations spanning 20.778 days (2011-Aug-30.7015 to 2011-Sep-20.479955)." Diameter approximately 0.030 km. from mean, weighted H=25.3.

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 18 October '11

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

2132Noted that JPL Sentry has posted 2011 UT as an impact risk - see above
1707Grabbed MPEC 2011-U12 - 2011 UT - see above
Grabbed MPEC 2011-U13 - 2011 UU - see above
1503Noted that JPL Sentry has updated its 2011 QF48 risk assessment - see above
Grabbed MPEC 2011-U11 - Daily Orbit Update - see above