Contents  on 16 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 16 February '13

Seven objects reported inside ten LD

Seven asteroids are reported to be inside ten lunar distances (LD) of our planet today. Radar target intruder 2012 DA14 starts the day inside the Earth-Moon system at 0.30 LD and exits out to 1.71 LD.

Further away, newly discovered 2013 DB comes its closest to Earth on this passage, reaching 4.99 LD at 0121 UT. 2013 CE82 is inbound from 6.80 to 5.04 LD and 2013 CZ87 from 8.62 to 7.81 LD. And radar target 2013 BS45 is outbound from 5.58 to 5.93 LD, newly announced intruder 2013 CL129 from 5.97 to 7.28 LD, and radar target 2013 BV15 from 6.20 to 7.75 LD.

Coming our way next, risk-listed 2007 EO88 arrives inside ten LD on March 15th.

This report was updated at 2353 UTC with new discovery 2013 DB (MPEC). This report was previously updated at 2005 UTC with new discoveries 2013 CL129 (MPEC), which passed Earth at 0.72 LD on February 11th, and 2013 CF129 (MPEC), which dipped inside ten LD during 10-14 February. Today's first traffic report was generated at 1621 UTC with radar observation of 2012 DA14 and optical follow-up in today's DOU MPEC for 2013 CZ87, 2013 CE82, 2012 DA14, and departed objects 2013 CL22, intruder 2013 CY, and 2013 BB70 (only the second follow-up for this object, adding 12.77 days to its previous 10.24-day observing arc), as well as observation of distant 136617 1994 CC.



Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. 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 16 February '13

Radar observation of one object

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


Data update noted at 0106 UTC when the database was dated 15 Feb.

NEOCP Activity  on 16 February '13

The MPC's NEO Confirmation Page has 28 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 28 objects listed. Of these, sixteen were "one nighters." So far The Tracking News has counted a total of 73 listings on the NEOCP today.

New MPECs  on 16 February '13

Minor Planet Electronic Circulars

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


MPEC 2013-D13 - "21:37 UT" - 2013 DB


MPEC 2013-D12 - "21:32 UT" - 2013 DA


MPEC 2013-D11 - "16:31 UT" - 2013 CN129


MPEC 2013-D10 - "16:27 UT" - 2013 CM129


MPEC 2013-D09 - "16:22 UT" - 2013 CL129


MPEC 2013-D08 - "16:01 UT" - 2013 CK129


MPEC 2013-D07 - "15:57 UT" - 2013 CJ129


MPEC 2013-D06 - "15:52 UT" - 2013 CH129


MPEC 2013-D05 - "15:48 UT" - 2013 CG129


MPEC 2013-D04 - "15:37 UT" - 2013 CF129


MPEC 2013-D03 - "15:32 UT" - 2013 CE129


MPEC 2013-D02 - "08:14 UT" - 2001 TY44


<< DOU on 16 Feb. '13 >>  MPEC 2013-D01 - "06:03 UT" - Daily Orbit Update

Observers  on 16 February '13

A total of 37 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-D01 -- 2012 DA14
H21Astronomical Research Obs. Westfield in Illinois, 33 in MPECs 2013-D01, 2013-D03 & 2013-D04 -- 2013 CW83, 2013 CW35, 2013 CW32, 2013 CV83, 2013 CT36, 2013 CS83, 2013 CR35, 2013 CQ35, 2013 CP35, 2013 CN35, 2013 CL89, 2013 CF129, 2013 CE129, 2013 BY45, 2013 BO73, 2013 BC18, 2013 BB70, 2013 AY52, 2013 AW52, 2013 AV60, 2013 AU76, 2013 AQ72, 2013 AQ60, 2013 AM60, 2013 AE4, 2013 AB53, 2012 XF112, 2012 WB25, 2012 VJ6, 2012 VG6, 2012 TY79, 2012 CD29, 5131
I47Auger Obs. in Argentina, 1 in MPEC 2013-D01 -- 2012 DA14
703Catalina Sky Survey (CSS) in Arizona, 27 in MPECs 2013-D01, 2013-D04, 2013-D12 & 2013-D13 -- 2013 DB, 2013 DA, 2013 CW35, 2013 CV83, 2013 CT36, 2013 CF129, 2013 AU76, 2012 CD29, 2009 SN98, 2003 CN17, 99935, 85953, 350513, 343098, 25916, 229007, 22771, 22753, 19764, 190161, 177016, 154347, 11284, 6455, 5189, 2329, 1627
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 19 in MPECs 2013-D01 & 2013-D08 -- 2013 CN35, 2013 CK129, 2012 XQ55, 2010 VA1, 2009 HU2, 2008 TD4, 2007 FD, 2003 AD1, 1994 EK, 1991 FB, 53550, 276770, 215188, 189700, 159686, 159518, 143992, 138883, 138127
G58Chabot Obs. in northern California, 1 in MPEC 2013-D01 -- 2013 CW83
I51Clinton Obs., 2 in MPEC 2013-D01 -- 11284, 5828
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2013-D01 -- 2013 CT36
448Desert Moon Obs. in New Mexico, 5 in MPEC 2013-D01 -- 2009 DK46, 1995 FJ, 348776, 185853, 141447
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2013-D01 -- 2013 CN35
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 10 in MPECs 2013-D01 & 2013-D10 -- 2013 CZ87, 2013 CZ, 2013 CX32, 2013 CM129, 2013 CE82, 2013 CB88, 2013 CA88, 2013 BN73, 2013 AO60, 198752
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2013-D12 & 2013-D13 -- 2013 DB, 2013 DA
252Goldstone DSS-13 34m antenna in southern California, 1 in radar -- 2012 DA14
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2012 DA14
J95Great Shefford Obs. in England, 8 in MPECs 2013-D01, 2013-D04, 2013-D06, 2013-D09, 2013-D10, 2013-D11, 2013-D12 & 2013-D13 -- 2013 DB, 2013 DA, 2013 CN129, 2013 CM129, 2013 CL129, 2013 CH129, 2013 CF129, 2012 DA14
W85LCOGT Cerro Tololo A in Chile, 2 in MPECs 2013-D01 & 2013-D11 -- 2013 CN129, 2010 GY6
W86LCOGT Cerro Tololo B in Chile, 3 in MPECs 2013-D01, 2013-D02 & 2013-D08 -- 2013 CK129, 2002 LY1, 2001 TY44
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-D01 -- 2013 BC70
568_Marco Micheli on Mauna Kea in Hawaii, 2 in MPEC 2013-D01 -- 2013 CU82, 2013 CT82
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2013-D01, 2013-D05, 2013-D06, 2013-D07, 2013-D09 & 2013-D10 -- 2013 CM129, 2013 CL129, 2013 CJ129, 2013 CH129, 2013 CG129, 2006 BG55, 39572, 22753, 190161, 4179
0892Oleksandr V. Shulga via Nikolaev Obs. in the Ukraine, 2 in MPEC 2013-D01 -- 2008 DG17, 3752
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2013-D01 -- 2013 AA2
F51Pan-STARRS 1 (PS1) in Hawaii, 26 in MPECs 2013-D01, 2013-D02, 2013-D03, 2013-D06, 2013-D08 & 2013-D11 -- 2013 CW32, 2013 CT36, 2013 CQ35, 2013 CN129, 2013 CL89, 2013 CK129, 2013 CH129, 2013 CE129, 2010 GR7, 2010 DM, 2008 CR118, 2002 DU3, 2001 TY44, 1999 YR14, 39796, 204131, 198752, 159368, 153249, 136793, 136635, 136617, 11284, 7977, 5828, 1627
H23Pear Tree Obs. in Florida, 1 in MPEC 2013-D01 -- 2008 DG17
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 9 in MPEC 2013-D01 -- 2013 CT36, 2013 CR35, 2013 AU76, 2012 XF112, 2012 CD29, 2010 QD2, 2008 DG17, 2003 CN17, 99942
J53Posadas Obs. in Spain, 1 in MPEC 2013-D01 -- 2008 DG17
D29Purple Mtn. Obs. Xuyi Station in China, 4 in MPEC 2013-D01 -- 2009 BL2, 19764, 11284, 2329
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2013-D01 -- 99942
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2013-D12 & 2013-D13 -- 2013 DB, 2013 DA
233San Vito Obs. in Italy, 2 in MPEC 2013-D01 -- 2010 QD2, 99942
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-D04 -- 2013 CF129
204Schiaparelli Obs. in Italy, 2 in MPECs 2013-D01 & 2013-D13 -- 2013 DB, 2013 CL89
J84South Obs. in England, 1 in MPEC 2013-D01 -- 2008 DG17
691Spacewatch 0.9m telescope in Arizona, 6 in MPEC 2013-D01 -- 2013 CQ35, 2008 CR118, 85490, 22753, 177016, 162210
291Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2013-D01, 2013-D03, 2013-D05, 2013-D06, 2013-D07, 2013-D10, 2013-D11 & 2013-D12 -- 2013 DA, 2013 CY, 2013 CN129, 2013 CM129, 2013 CL22, 2013 CJ129, 2013 CH129, 2013 CG129, 2013 CE129, 2013 BJ18, 2002 LY1
I93St. Pardon de Conques Obs. in France, 4 in MPECs 2013-D04, 2013-D08, 2013-D09 & 2013-D11 -- 2013 CN129, 2013 CL129, 2013 CK129, 2013 CF129
I76Tesla Obs. in Spain, 2 in MPEC 2013-D01 -- 2013 CR35, 2013 AU76
718Wiggins Obs. in Utah, 3 in MPEC 2013-D01 -- 2013 CT36, 2013 CR35, 2013 CE82
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 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 CK129JPL Sentry18072072-209932.3e-07-5.29-5.570JPL: "Analysis based on 17 observations spanning 1.7969 days (2013-Feb-14.49468 to 2013-Feb-16.29155)." Diameter approximately 0.140 km. from mean, weighted H=21.9.
2013 CB88JPL Sentry1616206211.5e-09-7.52-7.520JPL: "Analysis based on 11 observations spanning 2.6191 days (2013-Feb-12.41901 to 2013-Feb-15.03811)." Diameter approximately 0.095 km. from mean, weighted H=22.8.
2013 CT82JPL Sentry16162015-2107274.7e-08-3.35-3.920JPL: "Analysis based on 31 observations spanning 5.8141 days (2013-Feb-08.48634 to 2013-Feb-14.300468)." Diameter approximately 0.911 km. from mean, weighted H=17.9.
NEODyS16162028-2070183.84e-08-3.37-3.570NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2013-02-08.487 to 2013-02-14.301."
2013 CL22JPL Sentry1616206433.3e-06-5.42-5.600JPL: "Analysis based on 66 observations spanning 9.4800 days (2013-Feb-05.05792 to 2013-Feb-14.53792)." Diameter approximately 0.039 km. from mean, weighted H=24.7.
NEODyS16162064-206421.05e-06-5.91-5.960NEODyS: "Based on 66 optical observations (of which 3 are rejected as outliers) from 2013-02-05.059 to 2013-02-14.539."
2013 CYNEODyS16162058-209262.17e-06-7.60-8.090NEODyS: "Based on 72 optical observations (of which 0 are rejected as outliers) from 2013-02-01.350 to 2013-02-14.247."
2013 BC70JPL Sentry1616R E M O V E DJPL: Risk listing removed at 1052 UTC.
NEODyS1616R E M O V E D-
2012 DA14NEODyS1616R E M O V E D-

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 February '13

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

2353Updated Traffic Report
2216Grabbed MPEC 2013-D12 - 2013 DA - see above
Grabbed MPEC 2013-D13 - 2013 DB - see above
1807Noted that JPL Sentry has posted 2013 CK129 as an impact risk - see above
1721Grabbed MPEC 2013-D09 - 2013 CL129 - see above
Grabbed MPEC 2013-D10 - 2013 CM129 - see above
Grabbed MPEC 2013-D11 - 2013 CN129 - see above
1616Noted that NEODyS has removed 2012 DA14 as an impact risk - see above
Noted that JPL Sentry has removed 2013 BC70 as an impact risk - see above
Noted that NEODyS has removed 2013 BC70 as an impact risk - see above
Noted that JPL Sentry has posted 2013 CB88 as an impact risk - 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 CT82 risk assessment - see above
Noted that NEODyS has updated its 2013 CT82 risk assessment - see above
Noted that NEODyS has updated its 2013 CY risk assessment - see above
Grabbed MPEC 2013-D01 - Daily Orbit Update - see above
Grabbed MPEC 2013-D02 - 2001 TY44 - see above
Grabbed MPEC 2013-D03 - 2013 CE129 - see above
Grabbed MPEC 2013-D04 - 2013 CF129 - see above
Grabbed MPEC 2013-D05 - 2013 CG129 - see above
Grabbed MPEC 2013-D06 - 2013 CH129 - see above
Grabbed MPEC 2013-D07 - 2013 CJ129 - see above
Grabbed MPEC 2013-D08 - 2013 CK129 - see above
0106Noted Radar Astrometry database update - see above