Contents  on 28 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 28 May '12

Four objects reported inside ten LD

There are four visitors reported to be within ten lunar distances (LD) of our planet today. Risk-listed intruder 2012 KP24 is inside the Earth-Moon system, reaching 0.15 LD from Earth at 1520 UT, and coming its closest to the Moon -- 0.87 LD at 1500 UT. Newly announced risk-listed intruder 2012 KT42 enters Earth's Hill sphere, passing from 4.64 to 1.07 LD, on the way to a 0.05-LD* Earth passage tomorrow. 2012 KT12 exits the sphere, moving from 3.80 to 4.56 LD. And, out further, newly discovered 2012 KA42 leaves ten LD, traveling from 9.7 to 10.8 LD*.

On approach next, newly announced 2012 KZ41 arrives inside ten LD tomorrow, after which no other objects are predicted to come that close until November.

This report was updated at 1743 UTC with new discovery 2012 KT42 (MPEC) and follow-up in today's DOU MPEC for 2012 KP24 and departed 2012 HG2. Earlier we noted the discoveries of 2012 KA42 (MPEC) and 2012 KZ41 (MPEC). Today's first traffic report was generated at 0518 UTC.


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 28 May '12

The MPC's NEO Confirmation Page has 2 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two objects listed. Of these, one was a "one nighter." So far The Tracking News has counted a total of ten listings on the NEOCP today.

New MPECs  on 28 May '12

Minor Planet Electronic Circulars

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


MPEC 2012-K69 - "22:10 UT" - Comet C/2012 K5 (LINEAR)


MPEC 2012-K68 - "18:51 UT" - 2010 DM


MPEC 2012-K67 - "17:12 UT" - 2012 KU42


MPEC 2012-K66 - "15:22 UT" - 2012 KT42


<< DOU on 28 May '12 >>  MPEC 2012-K65 - "06:04 UT" - Daily Orbit Update


MPEC 2012-K64 - "01:20 UT" - 2012 KA42


MPEC 2012-K63 - "01:18 UT" - 2012 KZ41


MPEC 2012-K62 - "01:16 UT" - 2012 KY41


MPEC 2012-K61 - "01:14 UT" - 2012 KX41

Observers  on 28 May '12

A total of 35 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPECs 2012-K62, 2012-K63, 2012-K65 & 2012-K69 -- 2012 KZ41, 2012 KY41, 2012 KX, 2012 KP24, 2012 KO18, 2012 KN18, 2012 KM18, 2012 KF25, 2012 KD6, 2012 KC6, C/2012 K5, 2012 JU4, 2012 JH11, 2012 JB16, 2012 HJ1
B96Brixiis Obs. in Belgium, 1 in MPEC 2012-K69 -- C/2012 K5
160Castelmartini Obs. in Italy, 2 in MPEC 2012-K65 -- 312473, 141018
703Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2012-K63, 2012-K65 & 2012-K67 -- 2012 KZ41, 2012 KX, 2012 KU42, 2009 KJ22, 2006 VY13, 2006 KV86, 1999 VP6, 85628, 66272, 297274
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2012-K69 -- C/2012 K5
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2012-K63 -- 2012 KZ41
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-K62 -- 2012 KY41
F657Paul Roche in Wales via Faulkes Telescope North in Hawaii, 2 in MPECs 2012-K66 & 2012-K69 -- 2012 KT42, C/2012 K5
E102Ernesto Guido in Italy via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-K66 -- 2012 KT42
J95Great Shefford Obs. in England, 3 in MPECs 2012-K63, 2012-K67 & 2012-K69 -- 2012 KZ41, 2012 KU42, C/2012 K5
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2012-K65 -- 2011 WV134, 141018
695{Tomas Vorobjov in England via Kitt Peak Natl. Obs. (KPNO) in Arizona, 3 in MPECs 2012-K66, 2012-K67 & 2012-K69 -- 2012 KU42, 2012 KT42, C/2012 K5
704LINEAR in New Mexico, 1 in MPEC 2012-K69 -- C/2012 K5
B33Libbiano Obs. in Italy, 1 in MPEC 2012-K69 -- C/2012 K5
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2012-K62 -- 2012 KY41
C10Maisoncelles Obs. in France, 1 in MPEC 2012-K69 -- C/2012 K5
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-K68 -- 2010 DM
474Mt. John Obs. in New Zealand, 1 in MPEC 2012-K66 -- 2012 KT42
G96Mt. Lemmon Survey (MLS) in Arizona, 13 in MPECs 2012-K63, 2012-K64, 2012-K65, 2012-K66 & 2012-K67 -- 2012 KZ41, 2012 KU42, 2012 KT42, 2012 KE25, 2012 KA42, 2012 JU4, 2012 JT17, 2012 HY33, 2011 MB2, 2006 XG2, 2003 WH166, 66272, 433
C23Olmen Obs. in Belgium, 1 in MPEC 2012-K69 -- C/2012 K5
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2012-K61 & 2012-K62 -- 2012 KY41, 2012 KX41
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 8 in MPEC 2012-K65 -- 2012 KP24, 2011 WV134, 2007 LE, 2003 KU2, 2001 LB, 2000 JB6, 1994 NK, 153958
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-K69 -- C/2012 K5
H06*Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-K65 -- 2012 KP24
H06.Cristovao Jacques in Brazil via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-K69 -- C/2012 K5
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-K69 -- C/2012 K5
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2012-K65 -- 2012 KL18
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2012-K63, 2012-K67 & 2012-K69 -- 2012 KZ41, 2012 KU42, C/2012 K5
H36Sandlot Obs. in Kansas, 4 in MPECs 2012-K63, 2012-K65, 2012-K67 & 2012-K69 -- 2012 KZ41, 2012 KU42, C/2012 K5, 2012 CA21
204Schiaparelli Obs. in Italy, 4 in MPEC 2012-K65 -- 2012 KK11, 2012 KD6, 2002 OA22, 2001 LB
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2012-K64, 2012-K65 & 2012-K66 -- 2012 KT42, 2012 KA42, 2007 VX7
J84South Obs. in England, 1 in MPEC 2012-K69 -- C/2012 K5
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2012-K65 -- 2012 HN40, 141018
291Spacewatch 1.8m telescope in Arizona, 16 in MPECs 2012-K64, 2012-K65 & 2012-K67 -- 2012 KU42, 2012 KU12, 2012 KN11, 2012 KJ11, 2012 KA42, 2012 JU11, 2012 JS11, 2012 JO4, 2012 HY1, 2012 HH31, 2012 HG8, 2012 HG2, 2012 HD20, 2012 GT5, 2012 FO62, 2006 QA31
I93St. Pardon de Conques Obs. in France, 5 in MPECs 2012-K63, 2012-K65, 2012-K67 & 2012-K69 -- 2012 KZ41, 2012 KU42, C/2012 K5, 2001 LB, 154302
A71Stixendorf Obs. in Austria, 1 in MPEC 2012-K69 -- C/2012 K5
954Teide Obs. in the Canary Islands, 1 in MPEC 2012-K69 -- C/2012 K5
B18Terskol Obs. in Russia, 2 in MPECs 2012-K63 & 2012-K69 -- 2012 KZ41, C/2012 K5
198Wildberg Obs. in Germany, 1 in MPEC 2012-K67 -- 2012 KU42
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 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.
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 Sentry19042030-205743.9e-09-4.12-4.260JPL: "Analysis based on 33 observations spanning 3.0305 days (2012-May-25.44054 to 2012-May-28.471088)." Diameter approximately 1.400 km. from mean, weighted H=17.0.
2012 KT42JPL Sentry17422081-210971.9e-05-6.70-6.710JPL: "Analysis based on 21 observations spanning .26834 days (2012-May-28.29728 to 2012-May-28.56562)." Diameter approximately 0.006 km. from mean, weighted H=28.8.
2012 KP24JPL Sentry1638203212.3e-06-5.83-5.830JPL: "Analysis based on 85 observations spanning 3.9272 days (2012-May-23.33535 to 2012-May-27.262546)." Diameter approximately 0.019 km. from mean, weighted H=26.3.
NEODyS1638203212.61e-06-5.77-5.770NEODyS: "Based on 85 optical observations (of which 2 are rejected as outliers) from 2012-05-23.336 to 2012-05-27.263."
2012 HG2JPL Sentry16382053-2058114.4e-05-5.48-5.890JPL: "Analysis based on 202 observations spanning 36.977 days (2012-Apr-20.37147 to 2012-May-27.34808)." Diameter approximately 0.014 km. from mean, weighted H=27.0.
NEODyS16382053-20902201.33e-03-4.10-4.780NEODyS: "Based on 199 optical observations (of which 9 are rejected as outliers) from 2012-04-20.372 to 2012-05-27.349."

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 28 May '12

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

2307Grabbed MPEC 2012-K69 - Comet C/2012 K5 (LINEAR) - see above
1904Noted that JPL Sentry has posted 2012 KU42 as an impact risk - see above
Grabbed MPEC 2012-K68 - 2010 DM - see above
1743Updated Traffic Report
1742Noted that JPL Sentry has posted 2012 KT42 as an impact risk - see above
Grabbed MPEC 2012-K67 - 2012 KU42 - see above
1638Noted that JPL Sentry has updated its 2012 HG2 risk assessment - see above
Noted that NEODyS has updated its 2012 HG2 risk assessment - see above
Noted that JPL Sentry has updated its 2012 KP24 risk assessment - see above
Noted that NEODyS has updated its 2012 KP24 risk assessment - see above
Grabbed MPEC 2012-K65 - Daily Orbit Update - see above
Grabbed MPEC 2012-K66 - 2012 KT42 - see above
0148Grabbed MPEC 2012-K64 - 2012 KA42 - see above
0119Grabbed MPEC 2012-K61 - 2012 KX41 - see above
Grabbed MPEC 2012-K62 - 2012 KY41 - see above
Grabbed MPEC 2012-K63 - 2012 KZ41 - see above