Contents  on 16 April '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 16 April '10

The MPC's NEO Confirmation Page has 14 listings: 11 new, 3 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eleven new and three updated listings. Of these, eight were "one nighters." So far The Tracking News has counted a total of 21 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 16 April '10

Minor Planet Electronic Circulars

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


MPEC 2010-H05 - "17:06 UT" - 2010 GP67


MPEC 2010-H04 - "15:13 UT" - Comet C/2010 G3 (WISE)


MPEC 2010-H03 - "12:59 UT" - 2010 GO67


MPEC 2010-H02 - "12:55 UT" - 2010 GN67


<< DOU on 16 Apr. '10 >>  MPEC 2010-H01 - "06:10 UT" - Daily Orbit Update

Observers  on 16 April '10

A total of 24 observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 9 in MPEC 2010-H01 -- 2010 GV23, 2010 GS7, 2010 GP33, 2010 GL23, 2010 GE35, 2010 GA34, 2005 YU55, 2000 CO101, 153814
235CAST Obs. in Italy, 1 in MPEC 2010-H01 -- 2010 DB34
160Castelmartini Obs. in Italy, 4 in MPEC 2010-H01 -- 232382, 218863, 162998, 142464
703Catalina Sky Survey (CSS) in Arizona, 10 in MPEC 2010-H01 -- 2010 GH30, 2008 GG2, 2004 TB18, 88254, 68359, 232382, 162998, 4055, 3554, 1917
C13Como Obs. in Italy, 1 in MPEC 2010-H01 -- 2005 YU55
157Frasso Sabino Obs. in Italy, 5 in MPEC 2010-H01 -- 2010 GU21, 2010 GS7, 2010 GH30, 2010 EK44, 2005 YU55
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2010-H01, 2010-H02, 2010-H03 & 2010-H04 -- 2010 GO67, 2010 GN67, C/2010 G3, 2010 FD
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-H01 -- 2010 GW62
474Mt. John Obs. in New Zealand, 1 in MPEC 2010-H02 -- 2010 GN67
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2010-H01, 2010-H02 & 2010-H03 -- 2010 GU21, 2010 GS7, 2010 GO67, 2010 GN67, 2005 ED318, 1999 TA10, 218863, 164214, 161998, 153814
A13Naef Obs. in Switzerland, 3 in MPEC 2010-H01 -- 68216, 164201, 1917
A53Peschiera del Garda Obs. in Italy, 4 in MPEC 2010-H01 -- 2010 GU21, 2010 DB34, 220124, 218863
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2010-H01 -- 2005 YU55
204Schiaparelli Obs. in Italy, 1 in MPEC 2010-H01 -- 2010 GE35
691Spacewatch 0.9m telescope in Arizona, 6 in MPEC 2010-H01 -- 2010 GU6, 2008 GJ110, 234061, 215588, 152671, 136874
291Spacewatch 1.8m telescope in Arizona, 15 in MPEC 2010-H01 -- 2010 GZ5, 2010 GY6, 2010 GY23, 2010 GX62, 2010 GQ33, 2010 GE35, 2010 FY80, 2010 FT9, 2010 FQ9, 2010 FO, 2010 EJ43, 2010 CW180, 2006 EC1, 2004 RS25, 1998 WB2
A78Stia Obs. in Italy, 2 in MPEC 2010-H01 -- 2010 GU21, 2010 GS7
I19Tanti Obs. in Argentina, 3 in MPEC 2010-H01 -- 2010 GZ6, 2010 CC180, 2009 WN
H53Thompsonville Obs. in Illinois, 3 in MPEC 2010-H01 -- 88254, 218863, 3554
A48Verona Obs. in Italy, 1 in MPEC 2010-H01 -- 2010 GS7
C51WISE in Earth polar orbit, 2 in MPECs 2010-H04 & 2010-H05 -- 2010 GP67, C/2010 G3
718Wiggins Obs. in Utah, 1 in MPEC 2010-H01 -- 2005 YU55
I15Wishing Star Obs. in Rhode Island, 2 in MPEC 2010-H01 -- 2010 GS7, 2005 YU55
J08Zonalunar Obs. in Spain, 1 in MPEC 2010-H01 -- 218863
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 April '10

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 (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 GX62JPL Sentry13522043-210874.9e-07-4.14-4.180JPL: "Analysis based on 16 observations spanning 4.8638 days (2010-Apr-10.57631 to 2010-Apr-15.44009)." Diameter approximately 0.290 km. from mean, weighted H=20.3.
NEODyS13522043-208121.5e-08-5.14-5.170NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2010/04/10.577 to 2010/04/15.441."
2010 GE35NEODyS1352R E M O V E D-
2010 GV23JPL Sentry13522096-210526.5e-07-7.93-8.120JPL: "Analysis based on 59 observations spanning 5.8849 days (2010-Apr-09.21954 to 2010-Apr-15.104464)." Diameter approximately 0.010 km. from mean, weighted H=27.7.
2010 FDJPL Sentry1352208515.8e-07-6.96-6.960JPL: "Analysis based on 39 observations spanning 30.106 days (2010-Mar-16.34477 to 2010-Apr-15.45123)." Diameter approximately 0.021 km. from mean, weighted H=26.0.
NEODyS1352208515.57e-07-6.98-6.980NEODyS: "Based on 40 optical observations (of which 1 are rejected as outliers) from 2010/03/16.346 to 2010/04/15.452."
2005 YU55NEODyS22032057-2109763.34e-06-4.11-4.840NEODyS: "Based on 535 optical observations (of which 3 are rejected as outliers) from 2005/12/24.299 to 2010/04/15.954."
JPL Sentry21002059-2109192.5e-06-4.26-4.830JPL #2 for the day: "Analysis based on 533 observations spanning 1573.7 days (2005-Dec-24.29832 to 2010-Apr-15.95326)." Diameter approximately 0.140 km. from mean, weighted H=21.9.
153814 2001 WN5JPL Sentry1352213314.1e-10-6.54-6.54-JPL: "Analysis based on 154 observations spanning 5177.9 days (1996-Feb-10.39593 to 2010-Apr-15.34503)." Diameter approximately 0.790 km. from mean, weighted H=18.2.
NEODyS13522099-212251.79e-09-5.83-6.130NEODyS: "Based on 158 optical observations (of which 4 are rejected as outliers) from 1996/02/10.397 to 2010/04/15.346."

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 16 April '10

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

2203Noted that NEODyS has updated its 2005 YU55 risk assessment - see above
2100Noted that JPL Sentry has updated its 2005 YU55 risk assessment - see above
1731Grabbed MPEC 2010-H05 - 2010 GP67 - see above
1702Grabbed MPEC 2010-H04 - Comet C/2010 G3 (WISE) - see above
1352Noted that JPL Sentry has updated its 153814 2001 WN5 risk assessment - see above
Noted that NEODyS has updated its 153814 2001 WN5 risk assessment - see above
Noted that JPL Sentry has updated its 2005 YU55 risk assessment - see above
Noted that JPL Sentry has updated its 2010 FD risk assessment - see above
Noted that NEODyS has updated its 2010 FD risk assessment - see above
Noted that NEODyS has removed 2010 GE35 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 GV23 risk assessment - see above
Noted that JPL Sentry has updated its 2010 GX62 risk assessment - see above
Noted that NEODyS has updated its 2010 GX62 risk assessment - see above
Grabbed MPEC 2010-H01 - Daily Orbit Update - see above
Grabbed MPEC 2010-H02 - 2010 GN67 - see above
Grabbed MPEC 2010-H03 - 2010 GO67 - see above