Contents  on 14 March '12

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 14 March '12

Five objects reported inside ten LD

Five objects were reported passing within ten lunar distances (LD) of Earth today. Latest discovery 2012 EN5 entered Earth's Hill sphere and risk-listed radar target 2012 DW60 exited from same sphere. Further out, radar target 2012 DH54 headed outward from 5.10 to 5.95 LD and newly announced 2012 EJ5 from 5.56 to 5.75 LD, while newly discovered 2012 EM5 left ten LD, passing from 7.78 to 11.84 LD.

Next up, risk-listed new discovery 2012 EK5 arrives inside ten LD on March 19th (calculated with some uncertainty), risk-listed intruder 2012 EG5, also newly discovered, is calculated (with even more uncertainty) to arrive on March 27th, and returning 2007 HV4 comes inside on April 14th.

This report was updated at 0047 March 15th UTC with new discoveries 2012 EN5 (MPEC) and 2012 EM5 (MPEC), after earlier updating with discovery announcements for 2012 EK5 (MPEC), 2012 EJ5 (MPEC), and 2012 EG5 (MPEC), plus follow-up in today's DOU MPEC for departed objects 2012 EA and 2012 DA14. This report was previously updated at 1447 and 2037 UTC.


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.

NEOCP Activity  on 14 March '12

The MPC's NEO Confirmation Page has 22 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 22 objects listed. Of these, twelve were "one nighters." The Tracking News counted a total of 33 listings on the NEOCP on this day.

New MPECs  on 14 March '12

Minor Planet Electronic Circulars

There were ten MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2012-E59 - "22:34 UT" - 2012 EN5


MPEC 2012-E58 - "22:32 UT" - 2012 EM5


MPEC 2012-E57 - "22:30 UT" - 2012 EO5


MPEC 2012-E56 - "21:25 UT" - 2012 EL5


MPEC 2012-E55 - "18:21 UT" - 2012 EK5


MPEC 2012-E54 - "18:18 UT" - 2012 EJ5


MPEC 2012-E53 - "18:16 UT" - 2012 EH5


MPEC 2012-E52 - "18:14 UT" - 2012 EG5


MPEC 2012-E51 - "18:08 UT" - 2012 EF5


<< DOU on 14 Mar. '12 >>  MPEC 2012-E50 - "06:02 UT" - Daily Orbit Update

Observers  on 14 March '12

A total of 34 observers appeared in this day's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 25 in MPECs 2012-E50, 2012-E51, 2012-E52, 2012-E54, 2012-E55, 2012-E56, 2012-E57, 2012-E58 & 2012-E59 -- 2012 ER3, 2012 EO5, 2012 EO3, 2012 EN5, 2012 EN3, 2012 EM5, 2012 EL5, 2012 EK5, 2012 EJ5, 2012 EG5, 2012 EF5, 2012 EC, 2012 DZ32, 2012 DX75, 2012 DV32, 2012 DU30, 2012 DQ32, 2012 DL14, 2012 DH4, 2012 DG31, 2012 DF61, 2012 DA14, 2012 CC17, 2012 BJ11, 2004 QD17
B88Bigmuskie Obs. in Italy, 1 in MPEC 2012-E50 -- 2012 CA55
160Castelmartini Obs. in Italy, 6 in MPECs 2012-E50 & 2012-E56 -- 2012 EL5, 2012 BT23, 2012 BJ134, 2012 AA11, 2011 XO3, 2011 WV134
703Catalina Sky Survey (CSS) in Arizona, 20 in MPECs 2012-E50, 2012-E54, 2012-E57, 2012-E58 & 2012-E59 -- 2012 EO5, 2012 EN5, 2012 EM5, 2012 EJ5, 2012 DX75, 2012 DH4, 2001 HA8, 53319, 317255, 312942, 238063, 171819, 163000, 152667, 138205, 136618, 9400, 6455, 5620, 1862
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 9 in MPEC 2012-E50 -- 2012 EO3, 2012 EN3, 2012 DX32, 2012 DW30, 2012 DO8, 2012 BK11, 2008 EB9, 2003 UD22, 2003 SV222
I39Cruz del Sur Obs. in Argentina, 2 in MPEC 2012-E50 -- 2012 DO, 2008 EY5
C81Dolomites Obs. in Italy, 1 in MPEC 2012-E50 -- 2000 DQ110
151Eschenberg Obs. in Switzerland, 2 in MPECs 2012-E56 & 2012-E57 -- 2012 EO5, 2012 EL5
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2012-E56 -- 2012 EL5
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 3 in MPECs 2012-E50 & 2012-E52 -- 2012 EG5, 2012 EC, 2012 CQ36
F656Richard Miles in England via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-E56 -- 2012 EL5
203GiaGa Obs. in Italy, 5 in MPECs 2012-E50, 2012-E51 & 2012-E54 -- 2012 EJ5, 2012 EF5, 2012 DH4, 2012 DF61, 2012 AA11
A17Guidestar Obs. in Germany, 2 in MPECs 2012-E58 & 2012-E59 -- 2012 EN5, 2012 EM5
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2012-E50 -- 2012 BJ134, 2011 YV15, 141018
695{Tomas Vorobjov in England via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2012-E56 -- 2012 EL5
704LINEAR in New Mexico, 4 in MPECs 2012-E50, 2012-E51 & 2012-E56 -- 2012 EL5, 2012 EF5, 2011 XO3, 237805
J75La Sagra Obs. in Spain, 1 in MPEC 2012-E56 -- 2012 EL5
B33Libbiano Obs. in Italy, 2 in MPECs 2012-E54 & 2012-E56 -- 2012 EL5, 2012 EJ5
H01Magdalena Ridge Obs. (MRO) in New Mexico, 11 in MPECs 2012-E50, 2012-E51, 2012-E52, 2012-E53, 2012-E54, 2012-E55, 2012-E56, 2012-E57, 2012-E58 & 2012-E59 -- 2012 EO5, 2012 EN5, 2012 EM5, 2012 EL5, 2012 EK5, 2012 EJ5, 2012 EH5, 2012 EG5, 2012 EF5, 2012 EC, 2012 DA14
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-E50 -- 2012 BJ86
B67Mirasteilas Obs. in Switzerland, 5 in MPEC 2012-E50 -- 2012 EB2, 2012 DH4, 2012 BJ134, 2011 YV15, 2002 AW
900Moriyama Obs. in Japan, 3 in MPECs 2012-E56, 2012-E57 & 2012-E59 -- 2012 EO5, 2012 EN5, 2012 EL5
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2012-E50 & 2012-E55 -- 2012 EK5, 2012 CK2, 2012 CC17, 2010 LY63, 2004 BD68, 41429, 238063, 21277, 177255, 3551
A13Naef Obs. in Switzerland, 1 in MPEC 2012-E50 -- 9400
A24New Millennium Obs. in Italy, 2 in MPECs 2012-E51 & 2012-E56 -- 2012 EL5, 2012 EF5
F51Pan-STARRS 1 (PS1) in Hawaii, 10 in MPECs 2012-E50, 2012-E52 & 2012-E53 -- 2012 EH5, 2012 EG5, 2012 DP8, 2012 DN14, 2003 BK47, 2002 RD27, 85628, 38086, 162186, 162038
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 12 in MPEC 2012-E50 -- 2012 DX75, 2012 DH4, 2012 BJ134, 2012 BC20, 2011 YV15, 2011 SL102, 2004 QJ7, 267221, 263976, 24475, 141018, 137925
B04Saint-Barthelemy Obs. in Italy, 2 in MPECs 2012-E54 & 2012-E56 -- 2012 EL5, 2012 EJ5
104San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2012-E57, 2012-E58 & 2012-E59 -- 2012 EO5, 2012 EN5, 2012 EM5
H36Sandlot Obs. in Kansas, 3 in MPECs 2012-E50 & 2012-E56 -- 2012 EL5, 2012 DP8, 2008 UK90
204Schiaparelli Obs. in Italy, 5 in MPECs 2012-E51, 2012-E52, 2012-E53, 2012-E54 & 2012-E56 -- 2012 EL5, 2012 EJ5, 2012 EH5, 2012 EG5, 2012 EF5
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2012-E50 -- 89830, 3554
291Spacewatch 1.8m telescope in Arizona, 18 in MPECs 2012-E50, 2012-E52, 2012-E53, 2012-E54, 2012-E55 & 2012-E56 -- 2012 ES3, 2012 EL5, 2012 EK5, 2012 EJ5, 2012 EH5, 2012 EG5, 2012 EA, 2012 DX43, 2012 DX32, 2012 DJ61, 2012 DG61, 2012 DE61, 2012 DA14, 2012 CK2, 2012 BB2, 2011 XM1, 2010 OD101, 2009 FU23
I93St. Pardon de Conques Obs. in France, 4 in MPECs 2012-E51, 2012-E54, 2012-E56 & 2012-E59 -- 2012 EN5, 2012 EL5, 2012 EJ5, 2012 EF5
I49Sunflower Obs., 1 in MPEC 2012-E50 -- 162421
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 March '12

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
2012 EK5JPL Sentry20142053-21111371.1e-05-5.32-6.080JPL: "Analysis based on 19 observations spanning .89532 days (2012-Mar-13.44252 to 2012-Mar-14.337836)." Diameter approximately 0.025 km. from mean, weighted H=25.6.
2012 EG5JPL Sentry20142020-2105432.9e-05-4.00-4.640JPL: "Analysis based on 18 observations spanning 1.0177 days (2012-Mar-13.30201 to 2012-Mar-14.3197)." Diameter approximately 0.051 km. from mean, weighted H=24.1.
2012 ECJPL Sentry14472073-2110222.7e-06-5.27-5.840JPL: "Analysis based on 54 observations spanning 12.005 days (2012-Mar-01.3419 to 2012-Mar-13.34739)." Diameter approximately 0.067 km. from mean, weighted H=23.5.
NEODyS14472073-207722.6e-07-6.20-6.420NEODyS: "Based on 54 optical observations (of which 0 are rejected as outliers) from 2012-03-01.343 to 2012-03-13.348."
2012 DA14JPL Sentry14472020-2044347.9e-05-3.53-3.980JPL: "Analysis based on 132 observations spanning 19.497 days (2012-Feb-23.03431 to 2012-Mar-13.53118)." Diameter approximately 0.044 km. from mean, weighted H=24.4.
NEODyS14472020-20903164.05e-04-3.10-3.840NEODyS: "Based on 134 optical observations (of which 5 are rejected as outliers) from 2012-02-23.029 to 2012-03-12.323."
2012 BJ86NEODyS1447R E M O V E D-
JPL Sentry1447R E M O V E DJPL: Risk listing removed at 0852 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 14 March '12

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

0047 3/15Updated Traffic Report
2300Grabbed MPEC 2012-E57 - 2012 EO5 - see above
Grabbed MPEC 2012-E58 - 2012 EM5 - see above
Grabbed MPEC 2012-E59 - 2012 EN5 - see above
2136Grabbed MPEC 2012-E56 - 2012 EL5 - see above
2014Noted that JPL Sentry has posted 2012 EG5 as an impact risk - see above
Noted that JPL Sentry has posted 2012 EK5 as an impact risk - see above
1909Grabbed MPEC 2012-E52 - 2012 EG5 - see above
Grabbed MPEC 2012-E53 - 2012 EH5 - see above
Grabbed MPEC 2012-E54 - 2012 EJ5 - see above
Grabbed MPEC 2012-E55 - 2012 EK5 - see above
1908Grabbed MPEC 2012-E51 - 2012 EF5 - see above
1447Noted that JPL Sentry has removed 2012 BJ86 as an impact risk - see above
Noted that NEODyS has removed 2012 BJ86 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 DA14 risk assessment - see above
Noted that NEODyS has updated its 2012 DA14 risk assessment - see above
Noted that JPL Sentry has updated its 2012 EC risk assessment - see above
Noted that NEODyS has updated its 2012 EC risk assessment - see above
Grabbed MPEC 2012-E50 - Daily Orbit Update - see above