Contents  on 16 May '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 16 May '12

Three objects reported inside ten LD

Three visitors are reported passing within ten lunar distances (LD) of Earth today. Newly announced intruder 2012 KA enters Earth's Hill sphere, passing from 5.6 to 2.6 LD*, on its way to entering the Earth-Moon system tomorrow. Further away, 2010 KK37 may be moving from 8.7 to 6.4 LD* (Earth approach uncertainty +/- 1.160 days) and intruder 2012 JU departs from inside ten LD, traveling from 7.30 to 10.28 LD.

Next up, new discovery 2012 JV11 arrives inside ten LD on May 20th. After that, no other objects are known to be coming into the ten-LD "bubble" until November.

This report was generated at 1630 UTC with new discoveries 2012 KA (MPEC) and 2012 JV11 (MPEC) and follow-up in today's DOU MPEC for 2012 HG2.

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

NEOCP Activity  on 16 May '12

The MPC's NEO Confirmation Page has 11 listings

When last checked at 1906 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eleven objects listed. Of these, seven 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 16 May '12

Minor Planet Electronic Circulars

As of last check at 1906 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2012-K06 - "11:49 UT" - 2012 JX11

MPEC 2012-K05 - "11:48 UT" - 2012 JW11

MPEC 2012-K04 - "11:46 UT" - 2012 JV11

MPEC 2012-K03 - "11:44 UT" - 2012 JU11

MPEC 2012-K02 - "11:34 UT" - 2012 KA

<< DOU on 16 May '12 >>  MPEC 2012-K01 - "06:03 UT" - Daily Orbit Update

Observers  on 16 May '12

A total of 22 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPECs 2012-K01 & 2012-K03 -- 2012 JU11, 2012 JQ, 2012 JO4, 2012 JN4, 2012 HZ33, 2012 HR15, 2012 HO, 2012 HN8, 2012 HL, 2012 HK, 2012 HH8, 2012 HG8, 2012 FJ, 2012 CM29, 2012 CA21
C77Bernezzo Obs. in Italy, 1 in MPEC 2012-K01 -- 7889
703Catalina Sky Survey (CSS) in Arizona, 4 in MPEC 2012-K01 -- 2012 HN40, 2011 UU106, 163243, 6455
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 9 in MPECs 2012-K01, 2012-K04 & 2012-K05 -- 2012 JW11, 2012 JV11, 2012 JQ4, 2012 JQ, 2012 JN4, 2012 JM4, 2012 HL31, 2012 HF31, 2008 VK14
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2012-K05 -- 2012 JW11
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 2 in MPEC 2012-K01 -- 2012 JQ4, 2012 JN4
C73Galati Obs. in Romania, 1 in MPEC 2012-K01 -- 2012 JO4
J95Great Shefford Obs. in England, 3 in MPECs 2012-K03, 2012-K04 & 2012-K06 -- 2012 JX11, 2012 JV11, 2012 JU11
704LINEAR in New Mexico, 10 in MPEC 2012-K01 -- 2012 FE58, 2004 FF29, 1999 VP6, 85628, 312473, 297274, 152667, 5587, 4055, 3352
J75La Sagra Obs. in Spain, 1 in MPEC 2012-K06 -- 2012 JX11
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-K01 -- 2011 UB276
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2012-K01 & 2012-K02 -- 2012 KA, 2012 HY1, 2004 VB, 153195
608NEAT's USAF Haleakala telescope in Hawaii, 2 in MPEC 2012-K01 -- 65909, 248818
F51Pan-STARRS 1 (PS1) in Hawaii, 8 in MPECs 2012-K01, 2012-K03, 2012-K04 & 2012-K05 -- 2012 JW11, 2012 JV11, 2012 JU11, 2012 FR62, 2009 KJ22, 234341, 16960, 139289
H06.Cristovao Jacques in Brazil via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-K06 -- 2012 JX11
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2012-K04, 2012-K05 & 2012-K06 -- 2012 JX11, 2012 JW11, 2012 JV11
H36Sandlot Obs. in Kansas, 2 in MPECs 2012-K04 & 2012-K06 -- 2012 JX11, 2012 JV11
204Schiaparelli Obs. in Italy, 7 in MPEC 2012-K01 -- 2012 HN13, 2012 HD20, 2012 GS5, 2012 GK, 2007 RT19, 2002 JC9, 1999 VP6
033Schwarzschild Obs. in Germany, 1 in MPEC 2012-K01 -- 2001 QN142
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2012-K01 -- 2012 HY33
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2012-K01 & 2012-K06 -- 2012 JX11, 2012 HG2, 2012 BB124, 2010 TK54, 2006 WK3, 2001 MR3
954Teide Obs. in the Canary Islands, 1 in MPEC 2012-K01 -- 2011 WV134
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 May '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 1906 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 HG2JPL Sentry15402053-205682.8e-05-5.67-5.960JPL: "Analysis based on 164 observations spanning 24.921 days (2012-Apr-20.37147 to 2012-May-15.29263)." Diameter approximately 0.014 km. from mean, weighted H=27.0.
NEODyS15402053-20912731.22e-03-4.13-4.890NEODyS: "Based on 161 optical observations (of which 9 are rejected as outliers) from 2012-04-20.372 to 2012-05-15.293."

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 16 May '12

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

1630Generated Traffic Report
1540Noted that JPL Sentry has updated its 2012 HG2 risk assessment - see above
Noted that NEODyS has updated its 2012 HG2 risk assessment - see above
Grabbed MPEC 2012-K01 - Daily Orbit Update - see above
Grabbed MPEC 2012-K02 - 2012 KA - see above
Grabbed MPEC 2012-K03 - 2012 JU11 - see above
Grabbed MPEC 2012-K04 - 2012 JV11 - see above
Grabbed MPEC 2012-K05 - 2012 JW11 - see above
Grabbed MPEC 2012-K06 - 2012 JX11 - see above