Contents  on 5 February '09

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 5 February '09

The MPC's NEO Confirmation Page has 2 listings: 2 updated

When last checked at 2355 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two updated listings. Both of these were "one nighters." So far The Tracking News has counted a total of nine 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 5 February '09

Minor Planet Electronic Circulars

As of last check at 2355 UTC, there have been ten MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2009-C57 - "19:20 UT" - Comets C/2008 W8, 2008 W9, 2008 W10, 2008 W11 (SOHO)


MPEC 2009-C56 - "19:10 UT" - Comets C/2008 W4, 2008 W5, 2008 W6, 2008 W7 (SOHO)


MPEC 2009-C55 - "13:51 UT" - 2009 CC3


MPEC 2009-C54 - "13:49 UT" - 2009 CB3


MPEC 2009-C53 - "13:46 UT" - 2009 CA3


MPEC 2009-C52 - "13:44 UT" - 2009 CZ2


MPEC 2009-C51 - "13:41 UT" - 2009 CY2


MPEC 2009-C50 - "13:33 UT" - 2009 CX2


<< DOU on 5 Feb. '09 >>  MPEC 2009-C49 - "07:07 UT" - Daily Orbit Update


MPEC 2009-C48 - "04:05 UT" - 2008 LP17

Observers  on 5 February '09

A total of 20 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 7 in MPECs 2009-C49 & 2009-C50 -- 2009 CX2, 2009 CG, 2009 BO58, 2009 BL58, 2009 BE58, 2009 BC11, 1999 AQ10
493Calar Alto Obs. in Spain, 1 in MPEC 2009-C49 -- 2007 BG29
703Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2009-C49, 2009-C51 & 2009-C53 -- 2009 CY2, 2009 CA3, 2009 BL58, 2005 SN25, 141052, 4544
807Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2009-C48 -- 2008 LP17
448Desert Moon Obs. in New Mexico, 7 in MPEC 2009-C49 -- 2009 CW1, 2009 BL58, 2009 BK71, 2009 BE77, 2009 BB, 2008 YR2, 2002 CT11
682Kanab Obs. in Utah, 1 in MPEC 2009-C49 -- 2009 CZ
704LINEAR in New Mexico, 7 in MPECs 2009-C49 & 2009-C50 -- 2009 CX2, 2006 WZ2, 2002 XP90, 152931, 138925, 137924, 1864
E17Leura Obs. in New South Wales, 1 in MPEC 2009-C49 -- 87684
G96Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2009-C49, 2009-C50, 2009-C52, 2009-C53, 2009-C54 & 2009-C55 -- 2009 CZ2, 2009 CX2, 2009 CC3, 2009 CB3, 2009 CA3, 2009 AG16, 2001 PD1, 2000 AD205, 19764, 153271, 137924
675Mt. Palomar in southern California, 1 in MPEC 2009-C48 -- 2008 LP17
A13Naef Obs. in Switzerland, 3 in MPEC 2009-C49 -- 2009 BK71, 1999 CW8, 68350
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 13 in MPEC 2009-C49 -- 2009 BM2, 2009 BL58, 2009 BE58, 2009 BD58, 2009 AF16, 2008 XE2, 2008 EE, 2006 WZ2, 2006 AS2, 2003 YX1, 2000 BL19, 1999 CW8, 1999 AQ10
I20Rio Cuarto Obs. in Argentina, 2 in MPEC 2009-C49 -- 2004 NL8, 2003 QM47
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2009-C50, 2009-C51 & 2009-C53 -- 2009 CY2, 2009 CX2, 2009 CA3
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2009-C49 & 2009-C55 -- 2009 CC3, 161989, 108519
2492LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 8 in MPECs 2009-C56 & 2009-C57 -- C/2008 W9, C/2008 W8, C/2008 W7, C/2008 W6, C/2008 W5, C/2008 W4, C/2008 W11, C/2008 W10
2493LASCO Coronagraph 3 (SOHO C3) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 2 in MPEC 2009-C56 -- C/2008 W7, C/2008 W5
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2009-C49 -- 2003 RB, 2000 DV110, 3122
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2009-C49 -- 2009 CZ1, 2009 CT1, 2009 CB2
611Starkenburg Obs. in Germany, 1 in MPEC 2009-C49 -- 141052
198Wildberg Obs. in Germany, 1 in MPEC 2009-C49 -- 2009 CV
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 February '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2355 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. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few 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
2009 CC3JPL Sentry17042017-2108488.5e-08-3.86-4.350JPL: "Analysis based on 19 observations spanning .86852 days (2009-Feb-04.62941 to 2009-Feb-05.49793)." Diameter approximately 0.555 km. from mean, weighted H=18.9.
2009 CB3JPL Sentry19322014-2087331.1e-08-4.14-4.660JPL: "Analysis based on 20 observations spanning 1.0339 days (2009-Feb-04.49919 to 2009-Feb-05.5331)." Diameter approximately 0.487 km. from mean, weighted H=19.2.
2009 CR2NEODyS15242019-2089205.7e-09-3.61-3.740NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2009/02/03.304 to 2009/02/04.895."
2009 CA2NEODyS15242019-204359.94e-11-5.75-6.120NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2009/02/03.535 to 2009/02/04.550."
2009 CZ1NEODyS15242058-207441.15e-06-5.52-5.700NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2009/02/03.387 to 2009/02/05.268."
JPL Sentry15232058-210631.1e-06-5.55-5.720JPL: "Analysis based on 22 observations spanning 1.8816 days (2009-Feb-03.38609 to 2009-Feb-05.26765)." Diameter approximately 0.044 km. from mean, weighted H=24.4.
2009 CZJPL Sentry1523R E M O V E DJPL: Risk listing removed at 0950 UTC.

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 5 February '09

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

1932Noted that JPL Sentry has posted 2009 CB3 as an impact risk - see above
Grabbed MPEC 2009-C56 - Comets C/2008 W4, 2008 W5, 2008 W6, 2008 W7 (SOHO) - see above
Grabbed MPEC 2009-C57 - Comets C/2008 W8, 2008 W9, 2008 W10, 2008 W11 (SOHO) - see above
1704Noted that JPL Sentry has posted 2009 CC3 as an impact risk - see above
1523Noted that NEODyS has posted 2009 CA2 as an impact risk - see above
Noted that NEODyS has posted 2009 CR2 as an impact risk - see above
Noted that JPL Sentry has removed 2009 CZ as an impact risk - see above
Noted that JPL Sentry has updated its 2009 CZ1 risk assessment - see above
Noted that NEODyS has posted 2009 CZ1 as an impact risk - see above
Grabbed MPEC 2009-C49 - Daily Orbit Update - see above
Grabbed MPEC 2009-C50 - 2009 CX2 - see above
Grabbed MPEC 2009-C51 - 2009 CY2 - see above
Grabbed MPEC 2009-C52 - 2009 CZ2 - see above
Grabbed MPEC 2009-C53 - 2009 CA3 - see above
Grabbed MPEC 2009-C54 - 2009 CB3 - see above
Grabbed MPEC 2009-C55 - 2009 CC3 - see above
0517Grabbed MPEC 2009-C48 - 2008 LP17 - see above