Contents  on 14 April '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 April '12

One object reported inside ten LD

One asteroid may be within ten lunar distances (LD) of our planet today. 2007 HV4, not reported observed so far on this return visit, is calculated with an Earth passage uncertainty of +/- 1.748 days to enter ten LD today, passing from 11.5 to 9.7 LD*.

Coming our way next, radar target 2012 GP1 arrives inside ten LD on April 17th and 1992 JD arrives inside ten LD on April 30th (uncertainty +/- 4.600 hours).

This report was generated at 1712 UTC with follow-up from late March for 2012 EG5 in today's DOU MPEC.


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 14 April '12

The MPC's NEO Confirmation Page has 34 listings

When last checked at 2321 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 34 objects listed. Of these, 30 were "one nighters." The Tracking News counted a total of 46 listings on the NEOCP on this day.

New MPECs  on 14 April '12

Minor Planet Electronic Circulars

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


MPEC 2012-G47 - "23:25 UT" - 2012 GT5


MPEC 2012-G46 - "22:45 UT" - 2012 GS5


<< OOC on 14 Apr. '12 >> MPEC 2012-G45 - "20:04 UT" - Observations and Orbits of Comets


MPEC 2012-G44 - "17:18 UT" - 2012 GE5


MPEC 2012-G43 - "17:17 UT" - 2012 GD5


MPEC 2012-G42 - "17:15 UT" - 2012 GC5


MPEC 2012-G41 - "17:05 UT" - 2012 GB5


MPEC 2012-G40 - "17:04 UT" - 2012 GA5


<< DOU on 14 Apr. '12 >>  MPEC 2012-G39 - "06:03 UT" - Daily Orbit Update

Observers  on 14 April '12

A total of 49 observers appeared in this day's MPECs.

CodeObserver / observatory
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2012-G45 -- 237P
H21Astronomical Research Obs. Westfield in Illinois, 11 in MPECs 2012-G39 & 2012-G46 -- 2012 GS5, 2012 FR35, 2012 FP62, 2012 ES14, 2012 DG31, 2012 AA11, 2011 YV15, 2011 SL102, 2011 QD48, 2004 VB, 2004 QJ7
I47Auger Obs. in Argentina, 6 in MPEC 2012-G45 -- C/2011 L4, C/2011 A3, C/2010 G2, C/2009 F4, C/2006 S3, 29P
069Baldone Obs. in Latvia, 1 in MPEC 2012-G45 -- C/2009 P1
621Bergisch Gladbach Obs. in Germany, 1 in MPEC 2012-G45 -- 237P
300Bisei Spaceguard Center in Japan, 1 in MPEC 2012-G46 -- 2012 GS5
C86Blanes Obs. in Spain, 4 in MPEC 2012-G45 -- C/2011 F1, C/2009 P1, 49P, 29P
I99Blanquita Obs. in Spain, 3 in MPEC 2012-G45 -- C/2011 F1, C/2009 P1, 49P
I72Carpe-Noctem Obs., 2 in MPEC 2012-G45 -- C/2011 F1, C/2009 P1
160Castelmartini Obs. in Italy, 1 in MPEC 2012-G45 -- 237P
703Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2012-G39 -- 318450, 302830, 6455, 5587, 3352
J01Cielo Profundo Obs. in Spain, 7 in MPEC 2012-G45 -- C/2012 CH17, C/2012 A2, C/2011 F1, C/2009 P1, 237P, 49P, 29P
850Cordell-Lorenz Obs. in Tennessee, 4 in MPECs 2012-G39 & 2012-G45 -- 2012 FG58, 2011 QD48, C/2009 P1, 49P
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2012-G45 -- 29P
808El Leoncito Obs. in Argentina, 1 in MPEC 2012-G45 -- 29P
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 4 in MPECs 2012-G40, 2012-G41, 2012-G43 & 2012-G47 -- 2012 GT5, 2012 GD5, 2012 GB5, 2012 GA5
F657Paul Roche in Wales via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-G46 -- 2012 GS5
C73Galati Obs. in Romania, 3 in MPEC 2012-G45 -- C/2012 CH17, 246P, 49P
J95Great Shefford Obs. in England, 1 in MPEC 2012-G46 -- 2012 GS5
585Kiev Comet Station in the Ukraine, 4 in MPEC 2012-G45 -- C/2012 A2, 164P, 117P, 49P
168Kourovskaya Obs. in Russia, 4 in MPECs 2012-G39 & 2012-G45 -- 2012 EG5, 2012 DX75, C/2012 CH17, 2012 AA11
D95Kurihara Obs. in Japan, 1 in MPEC 2012-G45 -- 78P
704LINEAR in New Mexico, 10 in MPECs 2012-G39 & 2012-G45 -- 2012 GD2, 2012 GC2, 2012 FY23, C/2012 CH17, C/2011 J2, 86667, 312473, 9400, 5587, 49P
232Masquefa Obs. in Spain, 3 in MPEC 2012-G45 -- C/2011 F1, C/2009 P1, 78P
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPECs 2012-G42 & 2012-G44 -- 2012 GE5, 2012 GC5
213Montcabre Obs. in Spain, 5 in MPEC 2012-G45 -- C/2012 BJ98, C/2012 B3, C/2011 F1, C/2009 P1, 78P
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2012-G45 -- C/2010 U3, 237P, 88P
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2012-G45 -- 237P
0892Oleksandr V. Shulga via Nikolaev Obs. in the Ukraine, 6 in MPEC 2012-G45 -- C/2011 UF305, C/2010 S1, C/2006 S3, 246P, 49P, 29P
C47Nonndorf Obs. in Austria, 9 in MPECs 2012-G39 & 2012-G45 -- C/2012 CH17, 2012 AA11, C/2011 UF305, C/2011 F1, C/2010 R1, C/2009 P1, 246P, 49P, 29P
C23Olmen Obs. in Belgium, 8 in MPEC 2012-G45 -- C/2012 A2, C/2011 UF305, C/2011 F1, C/2010 S1, C/2009 P1, 246P, 49P, 29P
F51Pan-STARRS 1 (PS1) in Hawaii, 21 in MPECs 2012-G39, 2012-G40, 2012-G41, 2012-G42, 2012-G43, 2012-G44, 2012-G45, 2012-G46 & 2012-G47 -- 2012 GT5, 2012 GS5, 2012 GE5, 2012 GD5, 2012 GC5, 2012 GB5, 2012 GA5, P/2012 F5, C/2012 BJ98, 2009 QE8, 2009 KM7, 2008 QT3, 1998 KN3, 68346, 320378, 243025, 238063, 7341, 2059, 49P, 45P
H23Pear Tree Obs. in Florida, 3 in MPEC 2012-G45 -- C/2012 CH17, 49P, 29P
H06`E. Bryssinck via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-G45 -- C/2009 P1
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 21 in MPEC 2012-G45 -- C/2012 F6, C/2012 F3, C/2012 F1, C/2012 BJ98, P/2012 B1, C/2011 Y3, P/2011 Y2, C/2011 S2, C/2011 Q4, P/2011 N1, C/2011 F1, C/2007 D1, C/2005 L3, 255P, 240P, 182P, 171P, 152P, 117P, 60P, 29P
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 10 in MPEC 2012-G45 -- C/2012 CH17, C/2012 C1, C/2012 BJ98, C/2011 J2, C/2010 R1, C/2009 F4, 246P, 117P, 74P, 29P
071Rhozen Obs. in Bulgaria, 3 in MPEC 2012-G45 -- C/2011 J2, C/2010 G2, 78P
939Rodeno Obs. in Spain, 3 in MPEC 2012-G45 -- C/2011 F1, C/2009 P1, 78P
204Schiaparelli Obs. in Italy, 1 in MPEC 2012-G46 -- 2012 GS5
033Schwarzschild Obs. in Germany, 3 in MPEC 2012-G45 -- C/2012 F6, P/2012 F5, C/2012 E3
G68Sierra Stars Obs. in northern California, 1 in MPEC 2012-G45 -- C/2009 P1
691Spacewatch 0.9m telescope in Arizona, 5 in MPECs 2012-G39 & 2012-G45 -- 2011 MB2, P/2011 C2, 2009 KL2, 2002 GK8, 10636
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2012-G39, 2012-G40, 2012-G41, 2012-G43, 2012-G46 & 2012-G47 -- 2012 GT5, 2012 GS5, 2012 GD5, 2012 GB5, 2012 GA5, 2012 FM52, 2012 FG58, 2012 FB71
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2012-G46 -- 2012 GS5
A71Stixendorf Obs. in Austria, 6 in MPEC 2012-G45 -- C/2012 CH17, C/2012 A2, C/2011 UF305, C/2011 F1, C/2009 P1, 246P
926Tenagra II Obs. in Arizona, 1 in MPEC 2012-G46 -- 2012 GS5
C35Terrassa Obs., 1 in MPEC 2012-G45 -- 246P
H47Vicksburg Obs. in Mississippi, 7 in MPECs 2012-G39 & 2012-G45 -- 2012 DO, C/2010 R1, C/2006 S3, 246P, 164P, 49P, 29P
B42Vitebsk Obs. in Belarus, 3 in MPEC 2012-G45 -- C/2012 B3, C/2011 F1, 49P
C51WISE in Earth polar orbit, 1 in MPEC 2012-G45 -- 203P
I15Wishing Star Obs. in Rhode Island, 1 in MPEC 2012-G39 -- 2012 ES14
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 April '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2322 and JPL at 2321 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 GE5JPL Sentry20182049-209651.4e-07-7.36-7.440JPL: "Analysis based on 6 observations spanning .89735 days (2012-Apr-12.35845 to 2012-Apr-13.255802)." Diameter approximately 0.020 km. from mean, weighted H=26.2.
2012 FB71JPL Sentry1710R E M O V E DJPL: Risk listing removed at 0849 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 April '12

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

0008 4/15Grabbed MPEC 2012-G47 - 2012 GT5 - see above
2321Grabbed MPEC 2012-G46 - 2012 GS5 - see above
2018Noted that JPL Sentry has posted 2012 GE5 as an impact risk - see above
Grabbed MPEC 2012-G45 - Observations and Orbits of Comets - see above
1825Grabbed MPEC 2012-G42 - 2012 GC5 - see above
Grabbed MPEC 2012-G43 - 2012 GD5 - see above
Grabbed MPEC 2012-G44 - 2012 GE5 - see above
1712Generated Traffic Report
1710Noted that JPL Sentry has removed 2012 FB71 as an impact risk - see above
Grabbed MPEC 2012-G39 - Daily Orbit Update - see above
Grabbed MPEC 2012-G40 - 2012 GA5 - see above
Grabbed MPEC 2012-G41 - 2012 GB5 - see above