Contents  on 5 June '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 5 June '12

One object reported inside ten LD

One object is reported passing inside ten lunar distances (LD) of Earth today. 2012 LA is outbound from 8.2 to 8.4 LD*. No other objects are known to be approaching to come within ten LD until November.

This report was generated at 1537 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 5 June '12

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There were four listings noted earlier today.

New MPECs  on 5 June '12

Minor Planet Electronic Circulars

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


MPEC 2012-L13 - "19:12 UT" - Comet C/2012 L2 (LINEAR)


MPEC 2012-L12 - "18:18 UT" - Comet C/2012 L1 (LINEAR)


<< DOU on 5 June '12 >>  MPEC 2012-L11 - "06:01 UT" - Daily Orbit Update

Observers  on 5 June '12

Seventeen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2012-L11, 2012-L12 & 2012-L13 -- C/2012 L2, C/2012 L1, 2012 KU42
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 18 in MPEC 2012-L11 -- 2012 KY3, 2012 KX, 2012 KU42, 2012 KL45, 2012 KL18, 2012 KE25, 2012 JW11, 2012 JR17, 2012 HJ1, 2012 GX11, 2012 FE58, 2012 FA14, 2011 XO3, 2009 KJ, 2008 WZ13, 326777, 285110, 281375
C73Galati Obs. in Romania, 2 in MPECs 2012-L12 & 2012-L13 -- C/2012 L2, C/2012 L1
695{Tomas Vorobjov in England via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2012-L12 -- C/2012 L1
704LINEAR in New Mexico, 2 in MPECs 2012-L12 & 2012-L13 -- C/2012 L2, C/2012 L1
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-L11 -- 2012 BV26
118Modra Obs. in Slovakia, 2 in MPECs 2012-L12 & 2012-L13 -- C/2012 L2, C/2012 L1
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2012-L11 -- 2008 FT6, 1988 TA
C23Olmen Obs. in Belgium, 2 in MPECs 2012-L12 & 2012-L13 -- C/2012 L2, C/2012 L1
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2012-L11 -- 1221
H06*Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-L12 -- C/2012 L1
H06`Erik Bryssinck in Belgium via RAS Obs. Mayhill in New Mexico, 2 in MPECs 2012-L12 & 2012-L13 -- C/2012 L2, C/2012 L1
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 2 in MPECs 2012-L12 & 2012-L13 -- C/2012 L2, C/2012 L1
645Sloan Digital Sky Survey (SDSS) in New Mexico, 3 in MPEC 2012-L11 -- 2007 VY7, 2005 LD, 1999 GR6
J84South Obs. in England, 1 in MPEC 2012-L12 -- C/2012 L1
954Teide Obs. in the Canary Islands, 1 in MPEC 2012-L13 -- C/2012 L2
926Tenagra II Obs. in Arizona, 1 in MPEC 2012-L12 -- C/2012 L1
B18Terskol Obs. in Russia, 2 in MPECs 2012-L12 & 2012-L13 -- C/2012 L2, C/2012 L1
718Wiggins Obs. in Utah, 1 in MPEC 2012-L12 -- C/2012 L1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 June '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 KU42JPL Sentry1536R E M O V E DJPL: Risk listing removed at 0850 UTC.
NEODyS1536R E M O V E D-
2010 JC170JPL Sentry2316R E M O V E DJPL: Risk listing removed at 0800 UTC 18 Nov..

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 5 June '12

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

2316Noted that JPL Sentry has removed 2010 JC170 as an impact risk - see above
2001Grabbed MPEC 2012-L13 - Comet C/2012 L2 (LINEAR) - see above
Noted that the NEOCP has become empty
1904Grabbed MPEC 2012-L12 - Comet C/2012 L1 (LINEAR) - see above
1537Generated Traffic Report
1536Noted that JPL Sentry has removed 2012 KU42 as an impact risk - see above
Noted that NEODyS has removed 2012 KU42 as an impact risk - see above
Grabbed MPEC 2012-L11 - Daily Orbit Update - see above