Contents  on 22 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 22 February '09

The MPC's NEO Confirmation Page has 3 listings: 3 updated

When last checked at 2300 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of eight 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 22 February '09

Minor Planet Electronic Circulars

As of last check at 2300 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2009-D52 - "22:41 UT" - Comet 33P/Daniel


MPEC 2009-D51 - "14:42 UT" - 2009 DU10


MPEC 2009-D50 - "14:40 UT" - 2009 DT10


MPEC 2009-D49 - "14:38 UT" - 2009 DS10


<< DOU on 22 Feb. '09 >>  MPEC 2009-D48 - "07:07 UT" - Daily Orbit Update

Observers  on 22 February '09

A total of 26 observing facilities appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2009-D52 -- 33P
H55Astronomical Research Obs. (ARO) in Illinois, 29 in MPEC 2009-D48 -- 2009 DW, 2009 DV, 2009 DD, 2009 CZ2, 2009 CZ, 2009 CW1, 2009 CV, 2009 CU1, 2009 CT5, 2009 CS, 2009 CR4, 2009 CR2, 2009 CQ5, 2009 CP5, 2009 CN5, 2009 CG, 2009 BO58, 2009 BL2, 2009 BF81, 2009 BE81, 2009 BE77, 2009 BB, 2008 YZ32, 2008 YV148, 2008 YS27, 2008 YG3, 2008 US4, 2008 EV5, 1991 JW
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2009-D52 -- 33P
A81Balzaretto Obs. in Italy, 1 in MPEC 2009-D48 -- 2009 DZ
493Calar Alto Obs. in Spain, 2 in MPECs 2009-D50 & 2009-D51 -- 2009 DU10, 2009 DT10
703Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2009-D48 & 2009-D51 -- 2009 DU10, 2009 CV5, 25916, 205378, 200840, 152889
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2009-D48 -- 2009 CN5
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2009-D48 -- 2009 CV
J95Great Shefford Obs. in England, 4 in MPECs 2009-D48, 2009-D49 & 2009-D50 -- 2009 DT10, 2009 DS10, 2009 DR3, 2009 DG9
704LINEAR in New Mexico, 10 in MPEC 2009-D48 -- 2009 DO4, 2009 DF1, 2009 DD1, 2009 CO5, 2008 YE29, 2008 TE157, 2005 WS55, 86666, 142348, 141495
J75La Sagra Obs. in Spain, 1 in MPEC 2009-D48 -- 2009 BA71
B33Libbiano Obs. in Italy, 1 in MPEC 2009-D50 -- 2009 DT10
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2009-D48, 2009-D49, 2009-D50 & 2009-D51 -- 2009 DU10, 2009 DT10, 2009 DS10, 2009 DM1
213Montcabre Obs. in Spain, 1 in MPEC 2009-D52 -- 33P
900Moriyama Obs. in Japan, 1 in MPEC 2009-D48 -- 2009 DO4
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2009-D48, 2009-D49 & 2009-D50 -- 2009 DT10, 2009 DS10, 2008 XE3
J47Nazaret Obs. in Spain, 1 in MPEC 2009-D52 -- 33P
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPECs 2009-D48 & 2009-D52 -- 2009 DR3, 2009 CS, 2009 BA71, 2006 WZ2, 2004 EU9, 33P
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-D52 -- 33P
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2009-D50 & 2009-D51 -- 2009 DU10, 2009 DT10
H36Sandlot Obs. in Kansas, 3 in MPECs 2009-D49, 2009-D50 & 2009-D51 -- 2009 DU10, 2009 DT10, 2009 DS10
204Schiaparelli Obs. in Italy, 1 in MPEC 2009-D50 -- 2009 DT10
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPECs 2009-D48 & 2009-D50 -- 2009 DT10, 2009 DQ4, 2008 UZ94, 1036
291Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2009-D48 -- 2009 DL1, 2009 DA1, 2009 CX2, 2009 BJ58, 2009 BF, 2009 BC58
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2009-D52 -- 33P
A48Verona Obs. in Italy, 2 in MPEC 2009-D48 -- 2009 BA71, 2006 BC10
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 February '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2300 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 DS10JPL Sentry17322028-2108171.4e-08-5.84-6.650JPL: "Analysis based on 16 observations spanning 1.0524 days (2009-Feb-21.12598 to 2009-Feb-22.17841)." Diameter approximately 0.233 km. from mean, weighted H=20.8.
2009 DR3JPL Sentry1651R E M O V E DJPL: Risk listing removed at 1031 UTC.
NEODyS1651R E M O V E D-
2009 DM1JPL Sentry16512010-2100602.3e-07-2.70-3.390JPL: "Analysis based on 29 observations spanning 2.9813 days (2009-Feb-19.11474 to 2009-Feb-22.09601)." Diameter approximately 1.100 km. from mean, weighted H=17.4.
NEODyS16512010-2090451.92e-07-2.76-3.410NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2009/02/19.116 to 2009/02/22.097."
2009 DA1JPL Sentry16512063-206421.4e-07-5.45-5.450JPL: "Analysis based on 21 observations spanning 2.1958 days (2009-Feb-19.06293 to 2009-Feb-21.25877)." Diameter approximately 0.110 km. from mean, weighted H=22.4.
NEODyS16512058-206431.07e-07-5.58-5.600NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2009/02/19.064 to 2009/02/21.260."

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 22 February '09

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

2300Grabbed MPEC 2009-D52 - Comet 33P/Daniel - see above
1732Noted that JPL Sentry has posted 2009 DS10 as an impact risk - see above
1651Noted that JPL Sentry has updated its 2009 DA1 risk assessment - see above
Noted that NEODyS has updated its 2009 DA1 risk assessment - see above
Noted that JPL Sentry has updated its 2009 DM1 risk assessment - see above
Noted that NEODyS has updated its 2009 DM1 risk assessment - see above
Noted that JPL Sentry has removed 2009 DR3 as an impact risk - see above
Noted that NEODyS has removed 2009 DR3 as an impact risk - see above
Grabbed MPEC 2009-D48 - Daily Orbit Update - see above
Grabbed MPEC 2009-D49 - 2009 DS10 - see above
Grabbed MPEC 2009-D50 - 2009 DT10 - see above
Grabbed MPEC 2009-D51 - 2009 DU10 - see above