Contents  on 17 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 17 May '12

Three objects reported inside ten LD

Three asteroids are reported passing within ten lunar distances (LD) of Earth today. Intruder 2012 KA is inside the Earth-Moon system, reaching 0.58 LD from Earth at 1821 UT. Out further, 2010 KK37 is calculated to be in our day sky, inbound from 6.4 to 4.2 LD (Earth approach uncertainty +/- 1.160 days), and newly announced 2012 KW comes inside ten LD, traveling from 11.56 to 9.40 LD.

Approaching Earth next, 2012 JV11 arrives inside ten LD on May 20th. No other objects are known to be coming into the ten-LD "bubble" after that until November.

This report was updated at 2009 UTC with new discovery 2012 KW (MPEC) and, earlier, follow-up in today's DOU MPEC for 2012 KA, 2012 JV11, and departed 2012 HG2. Today's first traffic report was posted at 1633 UTC.


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.

Radar Astrometry  on 17 May '12

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 0024 UTC when the database was dated 16 May

NEOCP Activity  on 17 May '12

The MPC's NEO Confirmation Page has 15 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had fifteen objects listed. Of these, thirteen were "one nighters." So far The Tracking News has counted a total of 37 listings on the NEOCP today.

New MPECs  on 17 May '12

Minor Planet Electronic Circulars

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


MPEC 2012-K14 - "21:32 UT" - 2012 JS17


MPEC 2012-K13 - "18:51 UT" - 2012 JS11


MPEC 2012-K12 - "18:39 UT" - Comet C/2011 KP36 (Spacewatch)


MPEC 2012-K11 - "17:20 UT" - 2012 KX


MPEC 2012-K10 - "17:18 UT" - 2012 KW


MPEC 2012-K09 - "17:15 UT" - 2012 JR17


<< DOU on 17 May '12 >>  MPEC 2012-K08 - "06:03 UT" - Daily Orbit Update


MPEC 2012-K07 - "01:08 UT" - 2012 JB16

Observers  on 17 May '12

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

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2012-K08 -- 2012 JW11
251Arecibo in Puerto Rico, 1 in radar -- 326290
C60Argelander Institute for Astronomy Obs. in Germany, 3 in MPEC 2012-K08 -- 7092, 6455, 5587
H21Astronomical Research Obs. Westfield in Illinois, 11 in MPECs 2012-K07, 2012-K08, 2012-K10, 2012-K11, 2012-K12 & 2012-K14 -- 2012 KX, 2012 KW, 2012 JX11, 2012 JS17, 2012 JR4, 2012 JB16, 2012 HZ33, 2012 HW1, 2012 HJ1, 2011 QD48, C/2011 KP36
703Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2012-K07, 2012-K08, 2012-K09 & 2012-K11 -- 2012 KX, 2012 JR17, 2012 JB16, 2002 JC9, 36183, 24475, 154144, 152667, 5693, 4055
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPECs 2012-K08 & 2012-K12 -- 2012 JQ4, 2012 JQ, 2012 JM4, 2011 US63, C/2011 KP36, 189058
448Desert Moon Obs. in New Mexico, 3 in MPEC 2012-K08 -- 2012 HJ1, 2012 HD20, 2012 GX11
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 2 in MPECs 2012-K07 & 2012-K08 -- 2012 JQ4, 2012 JB16
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-K08 -- 2012 JU11
F657Paul Roche in Wales via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-K12 -- C/2011 KP36
E100Tim Lister in southern California via Faulkes Telescope South in New South Wales, 2 in MPECs 2012-K08 & 2012-K09 -- 2012 JV11, 2012 JR17
E107program code 7 via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-K14 -- 2012 JS17
J95Great Shefford Obs. in England, 6 in MPECs 2012-K07, 2012-K08, 2012-K09, 2012-K11, 2012-K12 & 2012-K14 -- 2012 KX, 2012 KA, 2012 JS17, 2012 JR17, 2012 JB16, C/2011 KP36
A17Guidestar Obs. in Germany, 1 in MPEC 2012-K07 -- 2012 JB16
695{Tomas Vorobjov in England via Kitt Peak Natl. Obs. (KPNO) in Arizona, 2 in MPECs 2012-K09 & 2012-K12 -- 2012 JR17, C/2011 KP36
704LINEAR in New Mexico, 6 in MPEC 2012-K08 -- 2012 FE58, 2004 FF29, 312473, 277142, 10636, 3352
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2012-K12 -- C/2011 KP36
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-K08 -- 2012 HO
474Mt. John Obs. in New Zealand, 1 in MPEC 2012-K12 -- C/2011 KP36
G96Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2012-K07, 2012-K08, 2012-K09, 2012-K10, 2012-K12, 2012-K13 & 2012-K14 -- 2012 KW, 2012 JS17, 2012 JS11, 2012 JR17, 2012 JB16, 2012 HD20, 2012 DX32, 2012 BJ11, C/2011 KP36, 297274, 153195
I89Nerpio Obs. in Italy, 1 in MPEC 2012-K09 -- 2012 JR17
A24New Millennium Obs. in Italy, 1 in MPEC 2012-K07 -- 2012 JB16
C39Nijmegen Obs., 3 in MPEC 2012-K08 -- 1994 NK, 312473, 141018
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPEC 2012-K08 -- 2005 YS165, 1998 OK1, 1685
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-K12 -- C/2011 KP36
J41Raheny Obs. in Ireland, 1 in MPEC 2012-K07 -- 2012 JB16
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2012-K07, 2012-K09 & 2012-K11 -- 2012 KX, 2012 JR17, 2012 JB16
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2012-K07 & 2012-K11 -- 2012 KX, 2012 JB16
H36Sandlot Obs. in Kansas, 4 in MPECs 2012-K07, 2012-K09, 2012-K11 & 2012-K14 -- 2012 KX, 2012 JS17, 2012 JR17, 2012 JB16
204Schiaparelli Obs. in Italy, 6 in MPECs 2012-K08, 2012-K09, 2012-K11, 2012-K12 & 2012-K14 -- 2012 KX, 2012 JS17, 2012 JR17, 2012 JB16, 2012 HZ33, C/2011 KP36
033Schwarzschild Obs. in Germany, 1 in MPEC 2012-K07 -- 2012 JB16
260&Rob Matson in southern California using the Siding Spring Digitized Sky Survey in New South Wales, 1 in MPEC 2012-K08 -- 2012 BB124
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPECs 2012-K07, 2012-K08 & 2012-K09 -- 2012 JR17, 2012 JB16, 154347, 887
J84South Obs. in England, 1 in MPEC 2012-K07 -- 2012 JB16
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2012-K08 & 2012-K12 -- 2012 HG31, C/2011 KP36, 162082
291Spacewatch 1.8m telescope in Arizona, 16 in MPECs 2012-K08, 2012-K10, 2012-K11, 2012-K12, 2012-K13 & 2012-K14 -- 2012 KX, 2012 KW, 2012 JS17, 2012 JS11, 2012 HG31, 2012 HG2, 2012 HD20, 2012 GV17, C/2011 KP36, 2010 LG14, 2010 FQ, 2010 EW45, 2009 JR5, 2006 WK3, 2004 CL, 2002 JE9
I93St. Pardon de Conques Obs. in France, 3 in MPECs 2012-K07, 2012-K11 & 2012-K14 -- 2012 KX, 2012 JS17, 2012 JB16
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 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 JR17JPL Sentry20142075-209561.3e-08-4.51-5.060JPL: "Analysis based on 35 observations spanning 3.0571 days (2012-May-14.41872 to 2012-May-17.475856)." Diameter approximately 1.100 km. from mean, weighted H=17.5.
2012 JS11JPL Sentry21272046-2111365.7e-08-4.72-5.670JPL: "Analysis based on 21 observations spanning 1.9152 days (2012-May-15.35926 to 2012-May-17.27447)." Diameter approximately 0.381 km. from mean, weighted H=19.8.
2012 HG2JPL Sentry16262053-2073909.2e-04-4.26-4.520JPL: "Analysis based on 166 observations spanning 25.936 days (2012-Apr-20.37147 to 2012-May-16.30796)." Diameter approximately 0.014 km. from mean, weighted H=27.0.
NEODyS16262053-20902321.24e-03-4.11-4.890NEODyS: "Based on 163 optical observations (of which 9 are rejected as outliers) from 2012-04-20.372 to 2012-05-16.309."

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 17 May '12

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

2146Grabbed MPEC 2012-K14 - 2012 JS17 - see above
2127Noted that JPL Sentry has posted 2012 JS11 as an impact risk - see above
2014Noted that JPL Sentry has posted 2012 JR17 as an impact risk - see above
Grabbed MPEC 2012-K12 - Comet C/2011 KP36 (Spacewatch) - see above
Grabbed MPEC 2012-K13 - 2012 JS11 - see above
2009Updated Traffic Report
1818Grabbed MPEC 2012-K09 - 2012 JR17 - see above
Grabbed MPEC 2012-K10 - 2012 KW - see above
Grabbed MPEC 2012-K11 - 2012 KX - see above
1626Noted 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-K08 - Daily Orbit Update - see above
0134Grabbed MPEC 2012-K07 - 2012 JB16 - see above
0024Noted Radar Astrometry database update - see above