Contents  on 14 June '13

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 14 June '13

One object reported inside ten LD

There is one asteroid reported inside ten lunar distances (LD) from our home world today. 2013 LD2 is outbound from 7.97 to 8.98 LD. No other objects are known to be coming within ten LD until late July.

This report was generated at 1455 UTC with follow-up in today's DOU MPEC for 2013 LD2 and, from February, observation of risk-listed 2013 BR27 and 2013 BL18.



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 14 June '13

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 2314 UTC when the database was dated 14 June

NEOCP Activity  on 14 June '13

The MPC's NEO Confirmation Page has 23 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 23 objects listed. Of these, nine were "one nighters."

New MPECs  on 14 June '13

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 2013-L67 - "14:57 UT" - 2006 UD63 = 2013 LJ25


<< DOU on 14 June '13 >>  MPEC 2013-L66 - "06:09 UT" - Daily Orbit Update

Observers  on 14 June '13

A total of 25 observers appear in today's MPEC.

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 285263
300Bisei Spaceguard Center in Japan, 1 in MPEC 2013-L66 -- 1972 RB
703Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2013-L66 -- 88710, 274855, 251722, 163249, 7888
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 5 in MPEC 2013-L66 -- 2013 LJ25, 2013 LD2, 2013 LC1, 2013 LB1, 2012 WB25
639Dresden Obs. in Germany, 2 in MPEC 2013-L66 -- 354952, 137199
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 285263
J95Great Shefford Obs. in England, 1 in MPEC 2013-L66 -- 2013 LE16
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2013-L66 -- 285263
695]Mark Trueblood via Kitt Peak Natl. Obs. (KPNO) in Arizona, 2 in MPEC 2013-L66 -- 2013 JH14, 2013 GQ38
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2013-L66 -- 2002 NV16
560Madonna di Dossobuono Obs. in Italy, 2 in MPEC 2013-L66 -- 2013 LB2, 2009 BL2
5682David Tholen's team on Mauna Kea in Hawaii, 4 in MPEC 2013-L66 -- 2013 BR27, 2013 BL18, 2012 VJ46, 2007 LS
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2013-L66 -- 2008 VN, 163364, 7350
C47Nonndorf Obs. in Austria, 3 in MPEC 2013-L66 -- 2013 JR28, 285263, 163249
261&Rob Matson in southern California using the Palomar Digitized Sky Survey in southern California, 1 in MPEC 2013-L66 -- 1972 RB
I41Palomar Transient Factory in southern California, 1 in MPEC 2013-L66 -- 210012
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2013-L66 -- 7350
A53Peschiera del Garda Obs. in Italy, 2 in MPEC 2013-L66 -- 2013 JR28, 2009 BL2
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 9 in MPEC 2013-L66 -- 2013 LH16, 2013 LE16, 2013 LC2, 2013 KN6, 2013 JR28, 2011 WU95, 2002 NV16, 285263, 163249
104San Marcello Pistoiese Obs. in Italy, 3 in MPEC 2013-L66 -- 2013 LK25, 285263, 137199
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2013-L66 -- 2013 LK25
204Schiaparelli Obs. in Italy, 1 in MPEC 2013-L66 -- 2013 LT28
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2013-L66 -- 2013 LC7, 2011 RR12, 2010 NJ1
291Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2013-L66 -- 2013 LK7, 2013 LH16, 2013 LE7, 2013 KY5, 2013 KF6, 2012 ST9, 2011 HL7
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-L66 -- 285263
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 June '13

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
2013 LT28JPL Sentry1452R E M O V E DJPL: Risk listing removed at 1031 UTC.
2013 LH16JPL Sentry1452R E M O V E DJPL: Risk listing removed at 1032 UTC.
2013 LE16JPL Sentry1452R E M O V E DJPL: Risk listing removed at 1030 UTC.
2013 BR27JPL Sentry14522073-2106362.6e-05-6.10-6.490JPL: "Analysis based on 21 observations spanning 12.153 days (2013-Jan-20.39041 to 2013-Feb-01.543753)." Diameter approximately 0.010 km. from mean, weighted H=27.7.
NEODyS14522067-2110512.99e-05-6.04-6.410NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2013-01-20.391 to 2013-02-01.545."
2013 BL18JPL Sentry14522070-209251.2e-05-5.47-5.690JPL: "Analysis based on 28 observations spanning 15.283 days (2013-Jan-17.28384 to 2013-Feb-01.567256)." Diameter approximately 0.022 km. from mean, weighted H=26.0.
NEODyS14522070-209281.86e-05-5.29-5.460NEODyS: "Based on 28 optical observations (of which 1 are rejected as outliers) from 2013-01-17.285 to 2013-02-01.568."

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 14 June '13

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

2314Noted Radar Astrometry database update - see above
1614Grabbed MPEC 2013-L67 - 2006 UD63 = 2013 LJ25 - see above
1455Generated Traffic Report
1452Noted that JPL Sentry has updated its 2013 BL18 risk assessment - see above
Noted that NEODyS has updated its 2013 BL18 risk assessment - see above
Noted that JPL Sentry has updated its 2013 BR27 risk assessment - see above
Noted that NEODyS has updated its 2013 BR27 risk assessment - see above
Noted that JPL Sentry has removed 2013 LE16 as an impact risk - see above
Noted that JPL Sentry has removed 2013 LH16 as an impact risk - see above
Noted that JPL Sentry has removed 2013 LT28 as an impact risk - see above
Grabbed MPEC 2013-L66 - Daily Orbit Update - see above