Contents  on 13 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 13 May '12

One object reported inside ten LD

There is one visitor reported passing within ten lunar distances (LD) of our planet. 2012 JU is inside the Earth-Moon system today for 13-plus hours, coming to 0.53 LD from Earth at 1319 UT and 0.82 LD from the Moon at 1726 UT.

Coming toward Earth next, 2010 KK37 arrives inside ten LD on May 15th with an Earth approach uncertainty of +/- 1.160 days. After that, no objects are known to be coming within the ten-LD "bubble" until November.

This report was generated at 1600 UTC with follow-up in today's DOU MPEC for 2012 JU as well as distant 2012 HG2 and 2012 DA14.

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 13 May '12

The MPC's NEO Confirmation Page has 16 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had sixteen objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of 20 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 13 May '12

Minor Planet Electronic Circulars

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

MPEC 2012-J37 - "15:14 UT" - 2009 MX6

<< DOU on 13 May '12 >>  MPEC 2012-J36 - "06:03 UT" - Daily Orbit Update

Observers  on 13 May '12

A total of 20 observers appear in today's MPECs.

CodeObserver / observatory
C60Argelander Institute for Astronomy Obs. in Germany, 11 in MPEC 2012-J36 -- 2012 DX75, 2011 WV134, 24475, 141018, 137925, 7889, 6455, 5587, 3352, 3103, 1866
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2012-J36 -- 2012 HH8
C77Bernezzo Obs. in Italy, 1 in MPEC 2012-J36 -- 2011 WV134
300Bisei Spaceguard Center in Japan, 1 in MPEC 2012-J36 -- 2012 HN40
160Castelmartini Obs. in Italy, 4 in MPEC 2012-J36 -- 2012 HL, 1994 NK, 312473, 141018
703Catalina Sky Survey (CSS) in Arizona, 8 in MPEC 2012-J36 -- 2012 HG8, 2012 GX11, 2006 VY13, 66272, 312473, 27002, 141531, 3352
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2012-J37 -- 2009 MX6
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 2 in MPEC 2012-J36 -- 2012 JQ, 2012 HG31
157Frasso Sabino Obs. in Italy, 2 in MPEC 2012-J36 -- 2009 XG8, 2008 JZ30
J95Great Shefford Obs. in England, 1 in MPEC 2012-J36 -- 2012 JU
379Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2012-J36 -- 2011 WV134, 2006 VY13, 141018, 6455, 5587
A06Mataro Obs. in Spain, 1 in MPEC 2012-J36 -- 6455
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2012-J36 -- 2012 HG2, 2012 DA14
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPEC 2012-J36 -- 2012 HD20, 2002 GQ5, 65909, 328059, 154715, 7088
A24New Millennium Obs. in Italy, 5 in MPEC 2012-J36 -- 2012 FY23, 2011 WV134, 2010 KX7, 66272, 53110
C47Nonndorf Obs. in Austria, 1 in MPEC 2012-J36 -- 2006 VY13
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPEC 2012-J36 -- 2012 CA21, 2002 VC92, 162173
J84South Obs. in England, 1 in MPEC 2012-J36 -- 2012 JU
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2012-J36 -- 2012 HG31
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2012-J36 -- 2012 HO15, 2012 GV11, 2012 EU14
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 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 HG2JPL Sentry15582053-21123441.9e-03-3.98-4.410JPL: "Analysis based on 158 observations spanning 22.114 days (2012-Apr-20.37147 to 2012-May-12.485447)." Diameter approximately 0.014 km. from mean, weighted H=27.0.
NEODyS15582053-20912351.04e-03-4.20-4.90NEODyS: "Based on 155 optical observations (of which 9 are rejected as outliers) from 2012-04-20.372 to 2012-05-12.486."
2012 DA14JPL Sentry15582026-2069363.3e-04-3.19-3.670JPL: "Analysis based on 188 observations spanning 79.384 days (2012-Feb-23.03431 to 2012-May-12.41842)." Diameter approximately 0.045 km. from mean, weighted H=24.4.
NEODyS15582026-20901103.36e-04-3.20-3.740NEODyS: "Based on 191 optical observations (of which 4 are rejected as outliers) from 2012-02-23.029 to 2012-05-12.419."

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 13 May '12

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

1600Generated Traffic Report
1558Noted that JPL Sentry has updated its 2012 DA14 risk assessment - see above
Noted that NEODyS has updated its 2012 DA14 risk assessment - see above
Noted 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-J36 - Daily Orbit Update - see above
Grabbed MPEC 2012-J37 - 2009 MX6 - see above