21 Lutetia imaged from Rosetta on 10 July 2010. 
(c)Copyright ESA 2010, credit OSIRIS team.

Of 243,553 numbered minor objects, this is number 21: Main Belt asteroid Lutetia, which was discovered from a Paris apartment balcony in 1852 and was flown past yesterday by the Rosetta comet mission. Credit: ESA OSIRIS team.


Contents  on 11 July '10

Note: A/CC news pages will update infrequently for much of the remainder of July.

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 11 July '10

The MPC's NEO Confirmation Page has 7 listings: 3 new, 4 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and four updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of nine listings on the NEOCP at some point 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 11 July '10

Minor Planet Electronic Circulars

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


MPEC 2010-N51 - "23:56 UT" - 2010 NU1


MPEC 2010-N50 - "17:16 UT" - 2010 NT1


<< DOU on 11 July '10 >>  MPEC 2010-N49 - "06:11 UT" - Daily Orbit Update

Observers  on 11 July '10

Seventeen observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 10 in MPECs 2010-N49 & 2010-N51 -- 2010 NU1, 2010 NL, 2010 NK1, 2010 NH, 2010 NB, 2010 MU112, 2010 MR87, 2010 MQ1, 2010 LM34, 2010 LK61
I99Blanquita Obs. in Spain, 2 in MPEC 2010-N49 -- 2010 EH20, 159609
160Castelmartini Obs. in Italy, 7 in MPEC 2010-N49 -- 2010 NK1, 2010 EH20, 2010 CJ171, 2009 WC26, 85989, 161998, 7977
H26Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2010-N49 -- 2010 NK1
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2010-N49 -- 2010 LY63
704LINEAR in New Mexico, 5 in MPEC 2010-N49 -- 2009 XC2, 2007 OG3, 2002 OS4, 241662, 9202
J75La Sagra Obs. in Spain, 1 in MPEC 2010-N49 -- 241662
B33Libbiano Obs. in Italy, 1 in MPEC 2010-N49 -- 2010 NK1
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPECs 2010-N50 & 2010-N51 -- 2010 NU1, 2010 NT1
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2010-N49 -- 2010 NG
I20Rio Cuarto Obs. in Argentina, 3 in MPEC 2010-N49 -- 2010 LY63, 2010 EC135, 2008 EM9
B38Santa Mama Obs. in Italy, 2 in MPEC 2010-N49 -- 241370, 152889
E12Siding Spring Survey in New South Wales, 1 in MPEC 2010-N49 -- 2010 NK
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2010-N49 -- 2002 PD43
D96Tzec Maun Obs. Moorook in South Australia, 1 in MPEC 2010-N49 -- 2010 LY63
C51WISE in Earth polar orbit, 2 in MPECs 2010-N50 & 2010-N51 -- 2010 NU1, 2010 NT1
G56Walnut Creek Obs. in northern California, 1 in MPEC 2010-N49 -- 161998
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 11 July '10

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.
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 (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
2010 NKJPL Sentry1104R E M O V E DJPL: Risk listing removed at 0954 UTC.
2010 NHJPL Sentry11042077-210741.8e-06-6.25-6.590JPL: "Analysis based on 41 observations spanning 5.8536 days (2010-Jul-04.42235 to 2010-Jul-10.27597)." Diameter approximately 0.026 km. from mean, weighted H=25.6.
NEODyS11042077-208929.41e-07-6.48-6.540NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2010/07/04.423 to 2010/07/10.277."
2010 MU112JPL Sentry11042033-210666.9e-08-4.58-4.730JPL: "Analysis based on 20 observations spanning 10.301 days (2010-Jun-30.07214 to 2010-Jul-10.373014)." Diameter approximately 0.220 km. from mean, weighted H=20.9.
NEODyS11042033-2090101.0e-07-4.44-4.620NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2010/06/30.073 to 2010/07/10.374."

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 11 July '10

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

2358Grabbed MPEC 2010-N50 - 2010 NT1 - see above
Grabbed MPEC 2010-N51 - 2010 NU1 - see above
1104Noted that JPL Sentry has updated its 2010 MU112 risk assessment - see above
Noted that NEODyS has updated its 2010 MU112 risk assessment - see above
Noted that JPL Sentry has updated its 2010 NH risk assessment - see above
Noted that NEODyS has updated its 2010 NH risk assessment - see above
Noted that JPL Sentry has removed 2010 NK as an impact risk - see above
Grabbed MPEC 2010-N49 - Daily Orbit Update - see above