Contents  on 24 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 24 June '12

Two objects reported inside ten LD

Two objects are reported flying within ten lunar distances (LD) of Earth today. Risk-listed 2012 MY2 is inbound from 5.04 to 4.26 LD and 2012 LU is outbound from 5.82 to 6.10 LD. Nothing else is known to come within ten LD of Earth until November.

This report was generated at 1609 UTC with follow-up in today's DOU MPEC for 2012 MY2 and departed 2012 LA11.

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.

NEOCP Activity  on 24 June '12

The MPC's NEO Confirmation Page has 17 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seventeen objects listed. Of these, seven were "one nighters." So far The Tracking News has counted a total of 35 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 24 June '12

Minor Planet Electronic Circulars

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

<< DOU on 24 June '12 >>  MPEC 2012-M41 - "06:02 UT" - Daily Orbit Update

MPEC 2012-M40 - "03:06 UT" - 2012 ML6

MPEC 2012-M39 - "03:03 UT" - 2012 MK6

MPEC 2012-M38 - "03:01 UT" - 2012 MJ6

Observers  on 24 June '12

A total of 27 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2012-M39 -- 2012 MK6
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPECs 2012-M39, 2012-M40 & 2012-M41 -- 2012 MY2, 2012 MW1, 2012 MU2, 2012 MS4, 2012 ML6, 2012 MK6, 2012 LL9, 2012 LJ11, 2012 LG11, 2012 LF11, 2012 LC1, 2012 KM45, 2012 BD27, 2001 DF47, 2135
C77Bernezzo Obs. in Italy, 1 in MPEC 2012-M41 -- 1984 QY1
I99Blanquita Obs. in Spain, 4 in MPEC 2012-M41 -- 329437, 326732, 153958, 7889
160Castelmartini Obs. in Italy, 11 in MPEC 2012-M41 -- 2012 LZ1, 2012 LG11, 2012 LE11, 2012 JR17, 2012 HG31, 2004 CL, 329291, 329275, 326732, 317685, 153958
703Catalina Sky Survey (CSS) in Arizona, 8 in MPEC 2012-M41 -- 2012 MS4, 2012 LE11, 2011 WV134, 2009 KJ22, 53110, 162173, 141056, 141018
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPECs 2012-M38, 2012-M39 & 2012-M41 -- 2012 MY2, 2012 MK6, 2012 MJ6, 2012 LR1, 2012 LK9, 2012 LC13
176Consell Obs. in Spain, 1 in MPEC 2012-M40 -- 2012 ML6
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2012-M39 -- 2012 MK6
448Desert Moon Obs. in New Mexico, 3 in MPEC 2012-M41 -- 326732, 276397, 141056
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2012-M41 -- 2012 MS4
J95Great Shefford Obs. in England, 1 in MPEC 2012-M40 -- 2012 ML6
704LINEAR in New Mexico, 13 in MPECs 2012-M40 & 2012-M41 -- 2012 MS4, 2012 ML6, 2012 LU7, 2004 XK35, 68359, 53110, 329669, 329614, 162173, 153958, 5626, 3908, 2201
711McDonald Obs. in Texas, 1 in MPEC 2012-M41 -- 2012 MU2
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2012-M41 -- 2004 CL, 1994 NK
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2012-M39 & 2012-M41 -- 2012 MS4, 2012 MK6, 2012 FN62, 2011 US63, 53110, 217837, 212546, 162173, 5620
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 4 in MPEC 2012-M41 -- 2012 LZ1, 2012 LU7, 2011 WV134, 2007 MM13
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2012-M41 -- 2012 MS4
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2012-M39 -- 2012 MK6
H36Sandlot Obs. in Kansas, 2 in MPECs 2012-M40 & 2012-M41 -- 2012 ML6, 2012 LA11
204Schiaparelli Obs. in Italy, 5 in MPEC 2012-M41 -- 2012 MW1, 2012 MP, 2012 LT7, 2012 LL9, 2004 XK35
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2012-M38 & 2012-M39 -- 2012 MK6, 2012 MJ6
291Spacewatch 1.8m telescope in Arizona, 9 in MPEC 2012-M41 -- 2012 MY2, 2012 LU7, 2012 LK2, 2012 LK11, 2012 LH11, 2012 LG4, 2012 LD13, 2012 HG8, 2001 SK276
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2012-M40 -- 2012 ML6
954Teide Obs. in the Canary Islands, 4 in MPECs 2012-M38, 2012-M39, 2012-M40 & 2012-M41 -- 2012 ML6, 2012 MK6, 2012 MJ6, 329669
C92Valdicerro Obs. in Italy, 1 in MPEC 2012-M40 -- 2012 ML6
718Wiggins Obs. in Utah, 2 in MPEC 2012-M41 -- 2012 LG11, 1685
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 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.





Notes for Today's Latest Risk Assessments
2012 MY2JPL Sentry16082072-2107181.4e-05-5.96-6.380JPL: "Analysis based on 48 observations spanning 4.0739 days (2012-Jun-19.18552 to 2012-Jun-23.25946)." Diameter approximately 0.018 km. from mean, weighted H=26.3.
NEODyS16082080-208932.43e-07-7.65-7.90NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2012-06-19.186 to 2012-06-23.260."
2012 MU2JPL Sentry16082015-209851.5e-04-0.64-0.641JPL: "Analysis based on 50 observations spanning 6.0005 days (2012-Jun-18.16459 to 2012-Jun-24.165123)." Diameter approximately 0.240 km. from mean, weighted H=20.8.
NEODyS16082015-206732.12e-04-0.47-0.471NEODyS: "Based on 50 optical observations (of which 0 are rejected as outliers) from 2012-06-18.165 to 2012-06-24.166."
2012 LK11JPL Sentry16082026-209565.1e-07-3.88-4.140JPL: "Analysis based on 51 observations spanning 8.0423 days (2012-Jun-15.36399 to 2012-Jun-23.40633)." Diameter approximately 0.315 km. from mean, weighted H=20.2.
NEODyS16082026-208579.86e-07-3.47-3.710NEODyS: "Based on 51 optical observations (of which 0 are rejected as outliers) from 2012-06-15.365 to 2012-06-23.407."
2012 LK9JPL Sentry16082047-205129.6e-10-5.22-5.340JPL: "Analysis based on 59 observations spanning 10.658 days (2012-Jun-12.35378 to 2012-Jun-23.01133)." Diameter approximately 1.100 km. from mean, weighted H=17.5.

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 24 June '12

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

1609Generated Traffic Report
1608Noted that JPL Sentry has updated its 2012 LK11 risk assessment - see above
Noted that NEODyS has updated its 2012 LK11 risk assessment - see above
Noted that JPL Sentry has updated its 2012 LK9 risk assessment - see above
Noted that JPL Sentry has updated its 2012 MU2 risk assessment - see above
Noted that NEODyS has updated its 2012 MU2 risk assessment - see above
Noted that JPL Sentry has updated its 2012 MY2 risk assessment - see above
Noted that NEODyS has updated its 2012 MY2 risk assessment - see above
Grabbed MPEC 2012-M41 - Daily Orbit Update - see above
0520Grabbed MPEC 2012-M38 - 2012 MJ6 - see above
Grabbed MPEC 2012-M39 - 2012 MK6 - see above
Grabbed MPEC 2012-M40 - 2012 ML6 - see above