Contents  on 9 December '10

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 9 December '10

The MPC's NEO Confirmation Page has 13 listings: 6 new, 7 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six new and seven updated listings. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 25 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 9 December '10

Minor Planet Electronic Circulars

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


MPEC 2010-X85 - "23:00 UT" - 2010 XG25


MPEC 2010-X84 - "19:57 UT" - 2010 XF25


<< DOU on 9 Dec. '10 >>  MPEC 2010-X83 - "14:50 UT" - Daily Orbit Update


MPEC 2010-X82 - "04:09 UT" - 2010 XE25


MPEC 2010-X81 - "04:03 UT" - 2010 XD25


MPEC 2010-X80 - "03:58 UT" - 2010 XC25


MPEC 2010-X79 - "03:16 UT" - 2010 XB25


MPEC 2010-X78 - "02:57 UT" - 2010 XA25


MPEC 2010-X77 - "02:14 UT" - 2010 TS149

Observers  on 9 December '10

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 2 in MPEC 2010-X83 -- 66146, 100926
H21Astronomical Research Obs. Westfield in Illinois, 18 in MPECs 2010-X79, 2010-X80, 2010-X81, 2010-X83 & 2010-X85 -- 2010 XV, 2010 XU, 2010 XS10, 2010 XG25, 2010 XD25, 2010 XC25, 2010 XB25, 2010 XB11, 2010 WC9, 2010 WA9, 2010 VQ21, 2010 VB40, 2010 UE51, 2010 UB7, 2010 TP54, 2010 TJ7, 2010 TH19, 2010 RA147
300Bisei Spaceguard Center in Japan, 5 in MPECs 2010-X78, 2010-X79, 2010-X81, 2010-X82 & 2010-X85 -- 2010 XG25, 2010 XE25, 2010 XD25, 2010 XB25, 2010 XA25
703Catalina Sky Survey (CSS) in Arizona, 25 in MPECs 2010-X78, 2010-X79, 2010-X81 & 2010-X83 -- 2010 XF3, 2010 XD25, 2010 XB25, 2010 XA25, 2010 XA24, 2010 WZ8, 2010 WQ7, 2010 WA9, 2010 SC41, 2010 NW117, 2004 YZ23, 2003 YS117, 2003 SV222, 68278, 48603, 256670, 253841, 251722, 247156, 19764, 170086, 153814, 10115, 3838, 1620
448Desert Moon Obs. in New Mexico, 2 in MPEC 2010-X83 -- 2010 XF3, 2010 UK8
H20Eastern Illinois Univ. Obs. in Illinois, 25 in MPEC 2010-X83 -- 2010 XO10, 2010 XG3, 2010 XG, 2010 XF3, 2010 XE11, 2010 XC24, 2010 WP8, 2010 WH, 2010 UX7, 2010 TM3, 2010 RN80, 2010 NW117, 2010 LO97, 2010 JL33, 2008 YU32, 2006 WY2, 2006 VB14, 2005 WE, 2005 GC120, 2004 YZ23, 2004 BW1, 2001 XF1, 2001 VB2, 2000 AC6, 1999 XR35
F65$Ernesto Guido in Italy via Faulkes Telescope North in Hawaii, 1 in MPEC 2010-X82 -- 2010 XE25
J77Golden Hill Obs. in England, 1 in MPEC 2010-X78 -- 2010 XA25
J95Great Shefford Obs. in England, 5 in MPECs 2010-X78, 2010-X79, 2010-X80, 2010-X81 & 2010-X82 -- 2010 XE25, 2010 XD25, 2010 XC25, 2010 XB25, 2010 XA25
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2010-X83 -- 2010 LF86, 2005 GC120
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2010-X83 -- 86324
G92Jarnac Obs. in Arizona, 1 in MPEC 2010-X83 -- 3288
704LINEAR in New Mexico, 11 in MPEC 2010-X83 -- 2010 XC24, 2010 XA24, 2010 RP80, 1999 XR35, 96590, 253106, 241370, 216115, 12923, 10115, 6569
844Los Molinos Obs. in Uruguay, 1 in MPEC 2010-X83 -- 2010 TV149
H01Magdalena Ridge Obs. (MRO) in New Mexico, 7 in MPECs 2010-X78, 2010-X79, 2010-X83, 2010-X84 & 2010-X85 -- 2010 XG25, 2010 XF25, 2010 XD11, 2010 XC25, 2010 XB25, 2010 XA25, 2010 UE51
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2010-X80, 2010-X82, 2010-X83 & 2010-X84 -- 2010 XF25, 2010 XE25, 2010 XC25, 2010 WH3, 2008 VK14, 2007 VG189, 1998 HK49, 38091, 199145, 3838
J93Mt. Tuffley Obs. in England, 5 in MPEC 2010-X83 -- 2010 JL33, 96590, 141498, 5869, 3122
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2010-X77 -- 2010 TS149
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2010-X78 -- 2010 XA25
H36Sandlot Obs. in Kansas, 5 in MPECs 2010-X78, 2010-X79, 2010-X80, 2010-X81 & 2010-X82 -- 2010 XE25, 2010 XD25, 2010 XC25, 2010 XB25, 2010 XA25
204Schiaparelli Obs. in Italy, 12 in MPEC 2010-X83 -- 2010 XY, 2010 WZ8, 2010 WL, 2010 WJ, 2010 WH3, 2010 WH, 2010 WD9, 2010 WC3, 2010 VV21, 2010 VE139, 2010 SA12, 2010 LR33
587Sormano Obs. in Italy, 1 in MPEC 2010-X85 -- 2010 XG25
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2010-X83 & 2010-X85 -- 2010 XG25, 2003 WX87
291Spacewatch 1.8m telescope in Arizona, 19 in MPECs 2010-X83, 2010-X84 & 2010-X85 -- 2010 XX, 2010 XU, 2010 XN, 2010 XK, 2010 XH, 2010 XG25, 2010 XF25, 2010 XD11, 2010 XC11, 2010 XB11, 2010 XA1, 2010 WS, 2010 WA9, 2010 VE, 2010 TP55, 2010 TP54, 2006 CE, 2005 BS27, 138852
6735Jim Young via Table Mtn. Obs. in southern California, 2 in MPECs 2010-X79 & 2010-X83 -- 2010 XB25, 2010 XA24
H10Tzec Maun Obs. Mayhill in New Mexico, 2 in MPEC 2010-X83 -- 2010 WV8, 3554
H47Vicksburg Obs. in Mississippi, 2 in MPEC 2010-X83 -- 2007 EM88, 137084
C51WISE in Earth polar orbit, 1 in MPEC 2010-X83 -- 7482
I15Wishing Star Obs. in Rhode Island, 3 in MPEC 2010-X83 -- 2010 WP8, 2010 LO97, 2005 GC120
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 9 December '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 XD25NEODyS17142018-2087282.95e-07-3.97-4.710NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2010-12-08.390 to 2010-12-09.051."
JPL Sentry07502018-21081083.4e-07-3.93-4.870JPL: "Analysis based on 24 observations spanning .66048 days (2010-Dec-08.38933 to 2010-Dec-09.04981)." Diameter approximately 0.250 km. from mean, weighted H=20.6.
2010 XC25JPL Sentry20352014-21103481.2e-05-2.50-3.360JPL #2 for the day: "Analysis based on 18 observations spanning 1.1030 days (2010-Dec-08.37716 to 2010-Dec-09.48013)." Diameter approximately 0.280 km. from mean, weighted H=20.4.
NEODyS20062013-2090806.02e-06-2.78-3.440NEODyS #2 for the day: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2010-12-08.378 to 2010-12-09.481."
2010 XD11JPL Sentry2006R E M O V E DJPL: Risk listing removed at 1949 UTC.
NEODyS1837R E M O V E D-
2010 XUNEODyS20062074-208862.03e-08-8.15-8.580NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2010-12-01.100 to 2010-12-09.339."
JPL Sentry19372084-210861.4e-08-8.34-8.600JPL: "Analysis based on 48 observations spanning 8.2391 days (2010-Dec-01.09924 to 2010-Dec-09.33836)." Diameter approximately 0.030 km. from mean, weighted H=25.3.
2010 XNJPL Sentry1908R E M O V E DJPL: Risk listing removed at 1904 UTC.
2010 WC9JPL Sentry20062027-2110344.8e-06-4.23-4.310JPL: "Analysis based on 26 observations spanning 7.9915 days (2010-Nov-30.08059 to 2010-Dec-08.072053)." Diameter approximately 0.071 km. from mean, weighted H=23.4.
NEODyS20062027-2088324.0e-06-4.28-4.350NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2010-11-30.081 to 2010-12-08.073."
2010 WA9JPL Sentry1937209814.1e-09-9.08-9.080JPL: "Analysis based on 39 observations spanning 8.1101 days (2010-Nov-30.26884 to 2010-Dec-08.37896)." Diameter approximately 0.024 km. from mean, weighted H=25.7.
2010 VV139JPL Sentry1908R E M O V E DJPL: Risk listing removed at 1906 UTC.
2010 VQ139JPL Sentry0521R E M O V E DJPL: Risk listing removed at 0422 UTC.
2010 UE51JPL Sentry2035R E M O V E DJPL: Risk listing removed at 2013 UTC.
2010 UHJPL Sentry05212044-2109291.2e-05-6.26-7.000JPL: "Analysis based on 18 observations spanning 14.935 days (2010-Oct-17.41946 to 2010-Nov-01.35435)." Diameter approximately 0.013 km. from mean, weighted H=27.1.
2010 TW54JPL Sentry05212074-2107143.0e-05-6.14-6.170JPL: "Analysis based on 70 observations spanning 4.9304 days (2010-Oct-11.34885 to 2010-Oct-16.27929)." Diameter approximately 0.010 km. from mean, weighted H=27.5.
2010 KV7JPL Sentry05212034-2109502.8e-05-5.09-5.500JPL: "Analysis based on 14 observations spanning 3.0485 days (2010-May-17.2011 to 2010-May-20.24965)." Diameter approximately 0.021 km. from mean, weighted H=26.0.
2010 DJ77JPL Sentry17142024-21071461.1e-06-7.00-7.930JPL: "Analysis based on 8 observations spanning .86030 days (2010-Feb-20.49966 to 2010-Feb-21.35996)." Diameter approximately 0.015 km. from mean, weighted H=26.8.
2009 VZ39JPL Sentry19372011-21108017.2e-06-5.65-5.870JPL: "Analysis based on 8 observations spanning .04342 days (2009-Nov-10.27204 to 2009-Nov-10.31546)." Diameter approximately 0.009 km. from mean, weighted H=27.9.
2009 TUJPL Sentry05212086-209552.2e-05-5.86-6.310JPL: "Analysis based on 57 observations spanning 8.2739 days (2009-Oct-10.18978 to 2009-Oct-18.463635)." Diameter approximately 0.011 km. from mean, weighted H=27.4.
2009 JF1JPL Sentry0521202213.3e-04-3.53-3.530JPL: "Analysis based on 25 observations spanning 1.2388 days (2009-May-04.42059 to 2009-May-05.659412)." Diameter approximately 0.013 km. from mean, weighted H=27.1.
2009 FDJPL Sentry19372185-219022.5e-03-1.66-1.69-JPL: "Analysis based on 175 observations spanning 626.44 days (2009-Feb-24.36493 to 2010-Nov-12.80566)." Diameter approximately 0.130 km. from mean, weighted H=22.1.
2008 VS4JPL Sentry19372011-21103309.1e-07-5.09-5.630JPL: "Analysis based on 10 observations spanning .08330 days (2008-Nov-07.413 to 2008-Nov-07.4963)." Diameter approximately 0.048 km. from mean, weighted H=24.2.
2008 VLJPL Sentry19372011-20401047.9e-07-6.99-8.010JPL: "Analysis based on 8 observations spanning .12404 days (2008-Nov-02.31035 to 2008-Nov-02.43439)." Diameter approximately 0.009 km. from mean, weighted H=27.9.
2008 SH148JPL Sentry19372011-21101941.0e-06-6.23-6.600JPL: "Analysis based on 11 observations spanning .10211 days (2008-Sep-29.18897 to 2008-Sep-29.29108)." Diameter approximately 0.020 km. from mean, weighted H=26.1.
2008 LDJPL Sentry05212049-2110504.6e-05-6.58-7.420JPL: "Analysis based on 26 observations spanning 8.0323 days (2008-Jun-02.29145 to 2008-Jun-10.32379)." Diameter approximately 0.006 km. from mean, weighted H=28.9.
2008 EM68JPL Sentry19372011-21109691.5e-05-5.27-5.750JPL: "Analysis based on 12 observations spanning .11019 days (2008-Mar-08.25164 to 2008-Mar-08.36183)." Diameter approximately 0.010 km. from mean, weighted H=27.7.
2008 EF32JPL Sentry19372011-208346.9e-08-8.85-9.220JPL: "Analysis based on 8 observations spanning .12271 days (2008-Mar-11.35979 to 2008-Mar-11.4825)." Diameter approximately 0.004 km. from mean, weighted H=29.4.
2008 CJJPL Sentry05212033-210638.3e-07-7.58-7.590JPL: "Analysis based on 13 observations spanning 1.0540 days (2008-Feb-02.24586 to 2008-Feb-03.299901)." Diameter approximately 0.012 km. from mean, weighted H=27.3.
2007 YS56JPL Sentry0027210417.1e-08-7.90-7.900JPL: "Analysis based on 49 observations spanning 11.051 days (2007-Dec-31.24562 to 2008-Jan-11.29675)." Diameter approximately 0.023 km. from mean, weighted H=25.8.
2007 YH1JPL Sentry00562024-2079121.1e-08-7.66-8.280JPL: "Analysis based on 11 observations spanning .90366 days (2007-Dec-17.43343 to 2007-Dec-18.33709)." Diameter approximately 0.041 km. from mean, weighted H=24.6.
2007 VK184JPL Sentry19372048-205743.4e-04-1.79-1.801JPL: "Analysis based on 101 observations spanning 60.013 days (2007-Nov-12.13904 to 2008-Jan-11.15189)." Diameter approximately 0.130 km. from mean, weighted H=22.0.
2007 UO6JPL Sentry19372011-2108151.7e-05-5.42-5.740JPL: "Analysis based on 9 observations spanning 1.9989 days (2007-Oct-21.36454 to 2007-Oct-23.36341)." Diameter approximately 0.012 km. from mean, weighted H=27.3.
2007 FY20JPL Sentry05212086-210161.0e-06-6.20-6.470JPL: "Analysis based on 1 radar Doppler and 59 optical observations spanning 6.6674 days (2007-Mar-26.2031 to 2007-Apr-01.870482)." Diameter approximately 0.037 km. from mean, weighted H=24.8.
2007 EH26JPL Sentry0853210912.3e-09-8.35-8.350JPL: "Analysis based on 40 observations spanning 6.0519 days (2007-Mar-10.42309 to 2007-Mar-16.475)." Diameter approximately 0.047 km. from mean, weighted H=24.3.
2007 EKJPL Sentry1837207816.7e-10-11.46-11.50JPL: "Analysis based on 38 observations spanning 3.9434 days (2007-Mar-09.21547 to 2007-Mar-13.158892)." Diameter approximately 0.005 km. from mean, weighted H=29.3.
2005 TM173JPL Sentry19372010-21061589.3e-07-4.41-4.460JPL: "Analysis based on 6 observations spanning 1.9467 days (2005-Oct-09.20072 to 2005-Oct-11.14743)." Diameter approximately 0.051 km. from mean, weighted H=24.1.
2005 SO1JPL Sentry1714211094.4e-06-5.84-6.360JPL: "Analysis based on 57 observations spanning 14.180 days (2005-Sep-23.26647 to 2005-Oct-07.44602)." Diameter approximately 0.028 km. from mean, weighted H=25.4.
2005 NX55JPL Sentry19372011-2102873.1e-08-4.15-4.210JPL: "Analysis based on 14 observations spanning 1.1343 days (2005-Jul-11.16281 to 2005-Jul-12.297115)." Diameter approximately 0.140 km. from mean, weighted H=21.9.
2005 CC37JPL Sentry0521210011.0e-08-7.22-7.220JPL: "Analysis based on 92 observations spanning 29.683 days (2005-Feb-06.86339 to 2005-Mar-08.54601)." Diameter approximately 0.099 km. from mean, weighted H=22.7.
2004 RU109JPL Sentry05212034-205366.1e-07-6.74-7.120JPL: "Analysis based on 50 observations spanning 1.6270 days (2004-Sep-11.22715 to 2004-Sep-12.85414)." Diameter approximately 0.017 km. from mean, weighted H=26.5.
2004 FU162JPL Sentry19372011-21107895.6e-05-4.73-5.050JPL: "Analysis based on 4 observations spanning .03055 days (2004-Mar-31.27744 to 2004-Mar-31.30799)." Diameter approximately 0.006 km. from mean, weighted H=29.0.
2003 DW10JPL Sentry05212046-205857.7e-07-6.67-7.010JPL: "Analysis based on 124 observations spanning 161.03 days (2003-Feb-26.2816 to 2003-Aug-06.30755)." Diameter approximately 0.020 km. from mean, weighted H=26.1.
2000 LG6JPL Sentry00562075-2109299.1e-04-5.42-5.870JPL: "Analysis based on 13 observations spanning 2.9772 days (2000-Jun-04.25538 to 2000-Jun-07.23253)." Diameter approximately 0.005 km. from mean, weighted H=29.0.

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 9 December '10

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

2312Grabbed MPEC 2010-X85 - 2010 XG25 - see above
2035Noted that JPL Sentry has removed 2010 UE51 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 XC25 risk assessment - see above
2006Noted that JPL Sentry has updated its 2010 WC9 risk assessment - see above
Noted that NEODyS has updated its 2010 WC9 risk assessment - see above
Noted that NEODyS has updated its 2010 XC25 risk assessment - see above
Noted that JPL Sentry has removed 2010 XD11 as an impact risk - see above
Noted that NEODyS has updated its 2010 XU risk assessment - see above
Grabbed MPEC 2010-X84 - 2010 XF25 - see above
1937Noted that JPL Sentry has updated its 2004 FU162 risk assessment - see above
Noted that JPL Sentry has updated its 2005 NX55 risk assessment - see above
Noted that JPL Sentry has updated its 2005 TM173 risk assessment - see above
Noted that JPL Sentry has updated its 2007 UO6 risk assessment - see above
Noted that JPL Sentry has updated its 2007 VK184 risk assessment - see above
Noted that JPL Sentry has updated its 2008 EF32 risk assessment - see above
Noted that JPL Sentry has updated its 2008 EM68 risk assessment - see above
Noted that JPL Sentry has updated its 2008 SH148 risk assessment - see above
Noted that JPL Sentry has updated its 2008 VL risk assessment - see above
Noted that JPL Sentry has updated its 2008 VS4 risk assessment - see above
Noted that JPL Sentry has updated its 2009 FD risk assessment - see above
Noted that JPL Sentry has posted 2009 VZ39 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 WA9 risk assessment - see above
Noted that JPL Sentry has updated its 2010 XU risk assessment - see above
1908Noted that JPL Sentry has removed 2010 VV139 as an impact risk - see above
Noted that JPL Sentry has removed 2010 XN as an impact risk - see above
1837Noted that JPL Sentry has posted 2007 EK as an impact risk - see above
Noted that NEODyS has removed 2010 XD11 as an impact risk - see above
1740Grabbed MPEC 2010-X83 - Daily Orbit Update - see above
1714Noted that JPL Sentry has posted 2005 SO1 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 DJ77 risk assessment - see above
Noted that NEODyS has posted 2010 XC25 as an impact risk - see above
Noted that NEODyS has posted 2010 XD25 as an impact risk - see above
0853Noted that JPL Sentry has posted 2007 EH26 as an impact risk - see above
0750Noted that JPL Sentry has posted 2010 XC25 as an impact risk - see above
Noted that JPL Sentry has posted 2010 XD25 as an impact risk - see above
0521Noted that JPL Sentry has updated its 2003 DW10 risk assessment - see above
Noted that JPL Sentry has updated its 2004 RU109 risk assessment - see above
Noted that JPL Sentry has updated its 2005 CC37 risk assessment - see above
Noted that JPL Sentry has updated its 2007 FY20 risk assessment - see above
Noted that JPL Sentry has updated its 2008 CJ risk assessment - see above
Noted that JPL Sentry has updated its 2008 LD risk assessment - see above
Noted that JPL Sentry has updated its 2009 JF1 risk assessment - see above
Noted that JPL Sentry has updated its 2009 TU risk assessment - see above
Noted that JPL Sentry has updated its 2010 KV7 risk assessment - see above
Noted that JPL Sentry has updated its 2010 TW54 risk assessment - see above
Noted that JPL Sentry has updated its 2010 UH risk assessment - see above
Noted that JPL Sentry has removed 2010 VQ139 as an impact risk - see above
Grabbed MPEC 2010-X77 - 2010 TS149 - see above
Grabbed MPEC 2010-X78 - 2010 XA25 - see above
Grabbed MPEC 2010-X79 - 2010 XB25 - see above
Grabbed MPEC 2010-X80 - 2010 XC25 - see above
Grabbed MPEC 2010-X81 - 2010 XD25 - see above
Grabbed MPEC 2010-X82 - 2010 XE25 - see above
0056Noted that JPL Sentry has updated its 2000 LG6 risk assessment - see above
Noted that JPL Sentry has updated its 2007 YH1 risk assessment - see above
0027Noted that JPL Sentry has updated its 2007 YS56 risk assessment - see above