Contents  on 19 May '12

Asteroid/Comet Connection (A/CC) Resources:

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Traffic Report  on 19 May '12

Three objects reported inside ten LD

There are three asteroids reported moving within ten lunar distances (LD) of Earth today. Inside Earth's Hill sphere, returning (and not yet reported observed) 2010 KK37 may be coming its closest to Earth on this passage, calculated to be 2.3 LD at around 1036 UTC (uncertainty: +/- 1.160 days), and possibly its closest to the Moon -- 1.7 LD at around 0257 UTC. Further away, intruder 2012 KA is outbound from 4.04 to 7.25 LD and 2012 KW is inbound from 7.32 to 5.40 LD.

Coming toward Earth next, 2012 JV11 arrives inside ten LD tomorrow, after which no objects are predicted to come inside ten LD until November.

This report was generated at 1614 UTC with follow-up in today's DOU MPEC for 2012 KW and 2012 JV11.

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 19 May '12

The MPC's NEO Confirmation Page has 29 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 29 objects listed. Of these, 23 were "one nighters." So far The Tracking News has counted a total of 62 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 19 May '12

Minor Planet Electronic Circulars

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

MPEC 2012-K22 - "10:39 UT" - 2012 KB4

MPEC 2012-K21 - "10:38 UT" - 2012 KA4

MPEC 2012-K20 - "10:36 UT" - 2012 KZ3

MPEC 2012-K19 - "10:34 UT" - 2012 KY3

<< DOU on 19 May '12 >>  MPEC 2012-K18 - "06:03 UT" - Daily Orbit Update

Observers  on 19 May '12

A total of 21 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 17 in MPECs 2012-K18, 2012-K19 & 2012-K21 -- 2012 KY3, 2012 KX, 2012 KW, 2012 KA4, 2012 JX11, 2012 JS11, 2012 JR4, 2012 JH11, 2012 JG11, 2012 JB16, 2012 HO, 2012 HN8, 2012 HK31, 2012 HH8, 2012 FX13, 2012 CA21, 2001 DF47
703Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2012-K18, 2012-K19 & 2012-K21 -- 2012 KY3, 2012 KA4, 1994 NK, 154144, 10150, 3103
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2012-K18 & 2012-K19 -- 2012 KY3, 2012 JV11, 2012 JN4, 2012 HC20
448Desert Moon Obs. in New Mexico, 2 in MPEC 2012-K18 -- 2012 JH11, 2012 HS15
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2012-K19 -- 2012 KY3
639Dresden Obs. in Germany, 1 in MPEC 2012-K18 -- 7889
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2012-K18 -- 2011 WV134, 141018, 5836
704LINEAR in New Mexico, 5 in MPEC 2012-K18 -- 2012 DO, 86667, 162082, 141018, 5587
130Lumezzane Obs. in Italy, 5 in MPEC 2012-K18 -- 2012 HN40, 53110, 326732, 322775, 162082
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-K18 -- 2012 DY43
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2012-K18, 2012-K19, 2012-K20, 2012-K21 & 2012-K22 -- 2012 KZ3, 2012 KY3, 2012 KB4, 2012 KA4, 85236, 322763, 154453
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPEC 2012-K18 -- 2012 HN40, 2012 FJ, 2008 JZ30, 162581, 9162
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2012-K18 -- 2011 WV134
H06_program code "_" (29) via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-K18 -- 162173
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2012-K21 -- 2012 KA4
204Schiaparelli Obs. in Italy, 5 in MPECs 2012-K18, 2012-K19 & 2012-K21 -- 2012 KY3, 2012 KX, 2012 KA4, 2012 JX11, 2011 YU62
033Schwarzschild Obs. in Germany, 4 in MPEC 2012-K18 -- 2012 KX, 2012 JU4, 2012 JB16, 2001 QN142
E12Siding Spring Survey in New South Wales, 1 in MPEC 2012-K18 -- 5143
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2012-K18 -- 312473
A98Taurus-1 Obs. in Belarus, 2 in MPEC 2012-K18 -- 2011 WV134, 1994 NK
I15Wishing Star Obs. in Rhode Island, 3 in MPEC 2012-K18 -- 2012 KX, 2012 JX11, 2012 DH61
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 May '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 KY3JPL Sentry16112016-210836.0e-10-5.09-5.160JPL: "Analysis based on 36 observations spanning 3.0590 days (2012-May-16.14111 to 2012-May-19.20014)." Diameter approximately 0.640 km. from mean, weighted H=18.6.
2012 JS11JPL Sentry16112052-2111175.0e-08-4.70-5.460JPL: "Analysis based on 23 observations spanning 2.9845 days (2012-May-15.35926 to 2012-May-18.343787)." Diameter approximately 0.392 km. from mean, weighted H=19.7.

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 19 May '12

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

1614Generated Traffic Report
1611Noted that JPL Sentry has updated its 2012 JS11 risk assessment - see above
Noted that JPL Sentry has posted 2012 KY3 as an impact risk - see above
Grabbed MPEC 2012-K18 - Daily Orbit Update - see above
Grabbed MPEC 2012-K19 - 2012 KY3 - see above
Grabbed MPEC 2012-K20 - 2012 KZ3 - see above
Grabbed MPEC 2012-K21 - 2012 KA4 - see above
Grabbed MPEC 2012-K22 - 2012 KB4 - see above