Contents  on 19 February '13

Asteroid/Comet Connection (A/CC) 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.

Traffic Report  on 19 February '13

Eight objects reported inside ten LD

Eight asteroids are reported to be within ten lunar distances (LD) of our planet today. 2013 CW129 exits Earth's Hill sphere, traveling from 1.78 to 5.11 LD. Further out, radar target intruder 2012 DA14 is outbound from 4.50 to 5.88 LD, 2013 CE82 from 6.01 to 8.23 LD, 2013 DB from 6.39 to 7.32 LD, and radar target 2013 BS45 from 6.80 to 7.29 LD. 2013 CZ87 comes its closest to Earth on this passage, reaching 7.01 LD at 0451 UT. And two others depart from inside ten LD: 2013 DP1 travels from 9.37 to 12.58 LD and intruder 2013 CL129 from 9.93 to 11.27 LD.

Next known to be coming to the neighborhood is risk-listed 2007 EO88, which arrives inside ten LD on March 15th.

This report was generated at 1727 UTC with three discoveries, all now departed: 2013 DP1 (MPEC), which passed Earth at 1.66 LD on February 16th, 2013 DC1 (MPEC), and 2013 DA1 (MPEC). Today's DOU MPEC has first follow-up for formerly risk-listed 2013 CW129 along with follow-up for 2012 DA14 and departed 2013 CL22 as well as distant 68216 2001 CV26.



Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) is estimated to extend out to around 3.89 LD. Object distances are interpreted by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

Radar Astrometry  on 19 February '13

Radar observation of two objects

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 2225 UTC when the database was dated 19 Feb.


Data update noted at 2359 UTC when the database was dated 19 Feb.

NEOCP Activity  on 19 February '13

The MPC's NEO Confirmation Page has 6 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six objects listed. Of these, three were "one nighters." So far The Tracking News has counted a total of 27 listings on the NEOCP today.

New MPECs  on 19 February '13

Minor Planet Electronic Circulars

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


MPEC 2013-D40 - "13:34 UT" - 2013 DP1


MPEC 2013-D39 - "09:53 UT" - 2013 DM1


MPEC 2013-D38 - "09:48 UT" - 2013 DL1


MPEC 2013-D37 - "09:25 UT" - 2013 DG1


<< DOU on 19 Feb. '13 >>  MPEC 2013-D36 - "06:03 UT" - Daily Orbit Update


MPEC 2013-D35 - "05:43 UT" - 2013 DC1


MPEC 2013-D34 - "05:39 UT" - 2013 DB1


MPEC 2013-D33 - "05:34 UT" - 2013 DA1


MPEC 2013-D32 - "05:25 UT" - 2013 DZ


MPEC 2013-D31 - "05:21 UT" - 2013 DY


MPEC 2013-D30 - "05:16 UT" - 2013 DX

Observers  on 19 February '13

A total of 27 observers appear in today's MPECs.

CodeObserver / observatory
C60Argelander Institute for Astronomy Obs. (AIfA Obs.) in Germany, 7 in MPEC 2013-D36 -- 2012 DA14, 68216, 22771, 214869, 137199, 5828, 3752
H21Astronomical Research Obs. Westfield in Illinois, 17 in MPECs 2013-D31, 2013-D33, 2013-D34, 2013-D35, 2013-D36 & 2013-D38 -- 2013 DY, 2013 DL1, 2013 DG, 2013 DC1, 2013 DB1, 2013 DA1, 2013 CV83, 2013 CT36, 2013 CR35, 2013 BC18, 2013 AW52, 2013 AQ72, 2013 AM60, 2012 XF112, 2012 CD29, 2009 BD2, 136635
A05Belesta Obs. in France, 2 in MPEC 2013-D36 -- 2012 DA14, 99942
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-D36 -- 2012 DA14
B88Bigmuskie Obs. in Italy, 1 in MPEC 2013-D36 -- 99942
703Catalina Sky Survey (CSS) in Arizona, 9 in MPECs 2013-D35, 2013-D36 & 2013-D39 -- 2013 DM1, 2013 DC1, 85990, 25916, 229007, 5836, 5828, 3671, 1981
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 12 in MPECs 2013-D32, 2013-D36 & 2013-D39 -- 2013 DZ, 2013 DM1, 2013 CX129, 2013 CL89, 2013 CK129, 2012 XE112, 2012 TH79, 2011 EB12, 2006 FJ9, 2005 LY19, 2005 EF, 2003 BB21
G58Chabot Obs. in northern California, 3 in MPEC 2013-D36 -- 2013 CW83, 2013 CV83, 2013 CB88
448Desert Moon Obs. in New Mexico, 5 in MPEC 2013-D36 -- 2009 UM3, 353190, 345853, 143637, 141447
252Goldstone DSS-13 34m antenna in southern California, 1 in radar -- 2012 DA14
253Goldstone DSS-14 70m antenna in southern California, 2 in radar -- 2013 BS45, 2012 DA14
J95Great Shefford Obs. in England, 1 in MPEC 2013-D38 -- 2013 DL1
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2013-D39 -- 2013 DM1
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2013-D30 -- 2013 DX
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2013-D36 -- 2013 CW129, 2002 LY1
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2013-D36 -- 2012 DA14
G96Mt. Lemmon Survey (MLS) in Arizona, 18 in MPECs 2013-D30, 2013-D31, 2013-D32, 2013-D33, 2013-D34, 2013-D35, 2013-D36, 2013-D37, 2013-D38, 2013-D39 & 2013-D40 -- 2013 DZ, 2013 DY, 2013 DX, 2013 DP1, 2013 DM1, 2013 DL1, 2013 DG1, 2013 DC1, 2013 DB1, 2013 DA1, 2013 AA32, 2006 FJ9, 1993 FS, 85990, 229007, 137078, 3554, 1917
0891program code 1 via Nikolaev Obs. in the Ukraine, 1 in MPEC 2013-D36 -- 99942
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2013-D36 -- 2012 DA14
233San Vito Obs. in Italy, 2 in MPEC 2013-D36 -- 99942, 11405
204Schiaparelli Obs. in Italy, 1 in MPEC 2013-D33 -- 2013 DA1
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2013-D36 -- 22771
291Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2013-D31, 2013-D36, 2013-D37, 2013-D38 & 2013-D40 -- 2013 DY, 2013 DP1, 2013 DL1, 2013 DG1, 2013 CU82, 2013 CU129, 2013 CT82, 2013 CL22, 2013 CK129, 2011 BN24
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2013-D35 & 2013-D38 -- 2013 DL1, 2013 DC1
926Tenagra II Obs. in Arizona, 2 in MPEC 2013-D36 -- 353190, 274855
A48Verona Obs. in Italy, 1 in MPEC 2013-D36 -- 2013 AU76
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-D36 -- 2012 DA14
H06+program code "+" (20) via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-D36 -- 2013 CV129
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-D39 -- 2013 DM1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 February '13

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 CLOMON2 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
2013 CW129JPL Sentry1603R E M O V E DJPL: Risk listing removed at 0957 UTC.
2013 CU129JPL Sentry16032110-211153.9e-09-4.85-5.060JPL: "Analysis based on 30 observations spanning 4.9913 days (2013-Feb-13.32055 to 2013-Feb-18.31184)." Diameter approximately 1.132 km. from mean, weighted H=17.3.
NEODyS1603R E M O V E D-
2013 CK129JPL Sentry1603207212.4e-07-5.18-5.180JPL: "Analysis based on 30 observations spanning 3.9901 days (2013-Feb-14.49468 to 2013-Feb-18.48482)." Diameter approximately 0.140 km. from mean, weighted H=21.9.
2013 CL22JPL Sentry1603206433.2e-06-5.44-5.640JPL: "Analysis based on 68 observations spanning 13.334 days (2013-Feb-05.05792 to 2013-Feb-18.39184)." Diameter approximately 0.039 km. from mean, weighted H=24.7.
NEODyS16032064-206421.07e-06-5.91-5.960NEODyS: "Based on 68 optical observations (of which 3 are rejected as outliers) from 2013-02-05.059 to 2013-02-18.393."

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 19 February '13

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

2359Noted Radar Astrometry database update - see above
2225Noted Radar Astrometry database update - see above
1727Generated Traffic Report
1603Noted that JPL Sentry has updated its 2013 CK129 risk assessment - see above
Noted that JPL Sentry has updated its 2013 CL22 risk assessment - see above
Noted that NEODyS has updated its 2013 CL22 risk assessment - see above
Noted that JPL Sentry has updated its 2013 CU129 risk assessment - see above
Noted that NEODyS has removed 2013 CU129 as an impact risk - see above
Noted that JPL Sentry has removed 2013 CW129 as an impact risk - see above
Grabbed MPEC 2013-D36 - Daily Orbit Update - see above
Grabbed MPEC 2013-D37 - 2013 DG1 - see above
Grabbed MPEC 2013-D38 - 2013 DL1 - see above
Grabbed MPEC 2013-D39 - 2013 DM1 - see above
Grabbed MPEC 2013-D40 - 2013 DP1 - see above
0548Grabbed MPEC 2013-D30 - 2013 DX - see above
Grabbed MPEC 2013-D31 - 2013 DY - see above
Grabbed MPEC 2013-D32 - 2013 DZ - see above
Grabbed MPEC 2013-D33 - 2013 DA1 - see above
Grabbed MPEC 2013-D34 - 2013 DB1 - see above
Grabbed MPEC 2013-D35 - 2013 DC1 - see above