Contents  on 18 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 18 March '12

Eight objects reported inside ten LD

Eight asteroids are reported passing within ten lunar distances (LD) of Earth today. 2012 EN5 is outward bound from 4.91 to 7.06 LD, 2012 EJ5 from 7.11 to 7.74 LD, risk-listed radar target 2012 DW60 from 7.21 to 8.41 LD, 2012 EL8 from 7.4 to 7.6 LD*, newly announced 2012 FN from 8.7 to 9.2 LD*, and radar target 2012 DH54 from 8.79 to 9.79 LD. Newly discovered 2012 FM comes its closest to Earth on this passage, reaching 8.25 LD at 0110 UTC. And 2012 EO8 enters ten LD, passing from 11.04 to 8.43 LD.

Coming toward Earth next, risk-listed 2012 EK5 arrives inside ten LD tomorrow, intruder 2012 EG5 (risk-listed radar target) on March 27th, and 2007 HV4 on April 14th.

This report was updated at 1503 UTC with follow-up in today's DOU MPEC for 2012 FG, 2012 EO8, 2012 EL8, and 2012 EJ5, and, earlier, with new discoveries 2012 FN (MPEC) and 2012 FM (MPEC), which were announced late yesterday. This report was previously updated at 0504 UTC.


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. "LD*" indicates some passage uncertainty. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 18 March '12

The MPC's NEO Confirmation Page has 10 listings

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

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 18 March '12

Minor Planet Electronic Circulars

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


MPEC 2012-F36 - "20:24 UT" - 2012 FD1


MPEC 2012-F35 - "20:22 UT" - 2012 FC1


MPEC 2012-F34 - "20:20 UT" - 2012 FB1


<< DOU on 18 Mar. '12 >>  MPEC 2012-F33 - "06:02 UT" - Daily Orbit Update


MPEC 2012-F32 - "04:44 UT" - Comet C/2012 F3 (Panstarrs)


MPEC 2012-F31 - "04:30 UT" - Comet C/2012 F2 (Panstarrs)


MPEC 2012-F30 - "04:18 UT" - Comet C/2012 F1 (Gibbs)

Observers  on 18 March '12

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 5 in MPEC 2012-F33 -- 2012 DX75, 2012 DH4, 2012 BJ134, 2012 AA11, 263976
H21Astronomical Research Obs. Westfield in Illinois, 17 in MPECs 2012-F33 & 2012-F35 -- 2012 FC1, 2012 EY11, 2012 EJ5, 2012 EF5, 2012 EA2, 2012 DM4, 2012 DG31, 2012 DE31, 2012 CC17, 2012 BT23, 2012 BJ134, 2012 AX, 2012 AA11, 2011 VW5, 2011 UP91, 2011 QD48, 2000 CP101
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2012-F33 -- 2012 EL5
B88Bigmuskie Obs. in Italy, 1 in MPEC 2012-F33 -- 1620
160Castelmartini Obs. in Italy, 9 in MPEC 2012-F33 -- 2012 DX75, 2012 DH4, 2012 BT23, 2012 BJ134, 2012 BC20, 2012 AA11, 2011 YV15, 2011 XO3, 2011 WV134
703Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2012-F30 & 2012-F33 -- C/2012 F1, 1998 KN3, 238063, 136618, 3102, 1036
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2012-F30 & 2012-F36 -- 2012 FD1, C/2012 F1
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2012-F33 -- 9400
448Desert Moon Obs. in New Mexico, 3 in MPEC 2012-F33 -- 2012 DZ32, 2005 FD, 138524
C73Galati Obs. in Romania, 10 in MPEC 2012-F33 -- 2012 EK8, 2011 XO3, 2011 WV134, 2011 QD48, 2006 VY13, 2002 EM6, 317643, 208565, 155336, 137925
651Grasslands Obs. in Arizona, 1 in MPEC 2012-F30 -- C/2012 F1
J95Great Shefford Obs. in England, 3 in MPECs 2012-F34, 2012-F35 & 2012-F36 -- 2012 FD1, 2012 FC1, 2012 FB1
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2012-F33 -- 154144
246KLENOT in the Czech Republic, 2 in MPECs 2012-F30 & 2012-F33 -- C/2012 F1, 2012 EO8
046Klet Obs. in the Czech Republic, 2 in MPEC 2012-F33 -- 2012 DX75, 2012 DH4
H05Kline Obs. in Colorado, 1 in MPEC 2012-F30 -- C/2012 F1
704LINEAR in New Mexico, 12 in MPEC 2012-F33 -- 2012 FJ, 2012 FG, 2011 YV15, 2011 XO3, 2011 WV134, 32906, 312942, 275558, 21277, 189008, 163000, 138205
844Los Molinos Obs. in Uruguay, 2 in MPEC 2012-F33 -- 2012 DO, 7341
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2012-F30 & 2012-F35 -- 2012 FC1, C/2012 F1
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-F33 -- 2008 CE119
568_Marco Micheli on Mauna Kea in Hawaii, 2 in MPECs 2012-F31 & 2012-F32 -- C/2012 F3, C/2012 F2
C91Montevenere Obs., 1 in MPEC 2012-F33 -- 2004 QJ7
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2012-F30, 2012-F33, 2012-F34, 2012-F35 & 2012-F36 -- 2012 FD1, 2012 FC1, 2012 FB1, C/2012 F1, 173664, 3102
A24New Millennium Obs. in Italy, 18 in MPEC 2012-F33 -- 2012 CD29, 2012 BJ134, 2012 AA11, 2011 XO3, 89959, 85839, 32906, 29075, 24475, 21088, 162186, 155336, 143651, 138359, 1917, 1862, 1627, 1620
C47Nonndorf Obs. in Austria, 2 in MPEC 2012-F33 -- 2012 BJ134, 2012 AA11
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPECs 2012-F31, 2012-F32 & 2012-F33 -- C/2012 F3, C/2012 F2, 2059
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-F30 -- C/2012 F1
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2012-F30 -- C/2012 F1
204Schiaparelli Obs. in Italy, 18 in MPEC 2012-F33 -- 2012 EN3, 2012 EL8, 2012 EB2, 2012 EA2, 2012 DF61, 2012 CD29, 2012 BJ134, 2012 BC20, 2011 WV134, 2011 SL102, 2011 QD48, 2011 EB12, 2008 JZ30, 2008 CC119, 2004 QJ7, 2002 RD27, 2002 EM6, 1998 KN3
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2012-F30 & 2012-F31 -- C/2012 F2, C/2012 F1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 18 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 ET14NEODyS15022021-208857.22e-09-3.18-3.540NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2012-03-15.211 to 2012-03-17.267."
2012 ER14NEODyS15022022-206441.8e-09-6.04-6.140NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2012-03-14.234 to 2012-03-17.159."

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 18 March '12

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

2053Grabbed MPEC 2012-F36 - 2012 FD1 - see above
2024Grabbed MPEC 2012-F34 - 2012 FB1 - see above
Grabbed MPEC 2012-F35 - 2012 FC1 - see above
1503Updated Traffic Report
1502Noted that NEODyS has posted 2012 ER14 as an impact risk - see above
Noted that NEODyS has posted 2012 ET14 as an impact risk - see above
Grabbed MPEC 2012-F33 - Daily Orbit Update - see above
0457Grabbed MPEC 2012-F31 - Comet C/2012 F2 (Panstarrs) - see above
Grabbed MPEC 2012-F32 - Comet C/2012 F3 (Panstarrs) - see above
0428Grabbed MPEC 2012-F30 - Comet C/2012 F1 (Gibbs) - see above