Contents  on 5 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 5 June '13

Two objects reported inside ten LD

There are two asteroids reported inside ten lunar distances (LD) of our planet today. Newly announced 2013 LD2 is inbound from 9.87 to 8.77 LD and 2009 FE leaves ten LD, traveling from 9.73 to 10.24 LD. No other objects are known to be coming this close until late July.

This report was updated at 2106 UTC with new discovery 2013 LD2 (MPEC). Today's first traffic report was generated at 1359 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.

NEOCP Activity  on 5 June '13

The MPC's NEO Confirmation Page has 7 listings

When last checked at 2106 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seven objects listed. Of these, three were "one nighters." So far The Tracking News has counted a total of seventeen 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 5 June '13

Minor Planet Electronic Circulars

As of last check at 2106 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2013-L26 - "18:50 UT" - 2013 LC2


MPEC 2013-L25 - "18:48 UT" - 2013 LD2


MPEC 2013-L24 - "18:45 UT" - 2013 LB2


MPEC 2013-L23 - "18:43 UT" - 2013 LA2


MPEC 2013-L22 - "13:08 UT" - 2011 HO60


MPEC 2013-L21 - "12:34 UT" - 2012 RG3


<< DOU on 5 June '13 >>  MPEC 2013-L20 - "06:05 UT" - Daily Orbit Update

Observers  on 5 June '13

A total of 39 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-L24 -- 2013 LB2
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPECs 2013-L20 & 2013-L24 -- 2013 LB2, 2013 JZ28, 2013 JW17, 2013 GX79, 2013 EK28, 2008 HD3, 1866
413*program code "*" (19) via Australian Natl. Univ. 1m telescope in New South Wales, 1 in MPEC 2013-L22 -- 2011 HO60
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-L20 -- 2013 JR28
B88Bigmuskie Obs. in Italy, 2 in MPEC 2013-L20 -- 2013 JR28, 53789
703Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2013-L20 & 2013-L26 -- 2013 LC2, 2006 WQ1, 274855, 26166, 189630, 163696, 5645, 4034
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPECs 2013-L20, 2013-L23 & 2013-L25 -- 2013 LD2, 2013 LB, 2013 LA2, 2013 LA, 2013 KB2, 2009 QZ6, 2001 WK15
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2013-L24 -- 2013 LB2
448Desert Moon Obs. in New Mexico, 5 in MPECs 2013-L20, 2013-L24 & 2013-L26 -- 2013 LC2, 2013 LB2, 2013 JK22, 2012 VJ6, 280136
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2013-L24 -- 2013 LB2
F659Marco Micheli in Hawaii via Faulkes Telescope North in Hawaii, 1 in MPEC 2013-L21 -- 2012 RG3
J95Great Shefford Obs. in England, 2 in MPECs 2013-L24 & 2013-L26 -- 2013 LC2, 2013 LB2
C43Hoyerswerda Obs. in Germany, 2 in MPECs 2013-L24 & 2013-L26 -- 2013 LC2, 2013 LB2
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2013-L23 -- 2013 LA2
W86LCOGT Cerro Tololo B in Chile, 3 in MPECs 2013-L20, 2013-L22 & 2013-L25 -- 2013 LE1, 2013 LD2, 2011 HO60
J75La Sagra Obs. in Spain, 1 in MPEC 2013-L24 -- 2013 LB2
J38La Vara Obs. in Spain, 1 in MPEC 2013-L20 -- 285263
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2013-L20 -- 2013 LC1
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2013-L20 -- 2013 GX79, 2013 GW79
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2013-L23 -- 2013 LA2
932McCarthy Obs. in Connecticut, 1 in MPEC 2013-L26 -- 2013 LC2
474Mt. John Obs. in New Zealand, 6 in MPECs 2013-L20, 2013-L24 & 2013-L25 -- 2013 LD2, 2013 LB2, 2013 LB, 2013 LA, 2013 KL6, 2013 JR28
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2013-L20 -- 4179, 1627
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2013-L20 -- 2002 KK8
A13Naef Obs. in Switzerland, 3 in MPEC 2013-L20 -- 2002 NV16, 354332, 163249
C23Olmen Obs. in Belgium, 1 in MPEC 2013-L20 -- 285263
F51Pan-STARRS 1 (PS1) in Hawaii, 4 in MPECs 2013-L20 & 2013-L23 -- 2013 LA2, 2013 GU79, 1993 FS, 68348
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2013-L20 -- 2013 JB36, 2005 MO13, 285263
941Pla D'Arguines Obs. in Spain, 1 in MPEC 2013-L20 -- 285263
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2013-L24 & 2013-L26 -- 2013 LC2, 2013 LB2
260&Rob Matson in southern California using the Siding Spring Digitized Sky Survey in New South Wales, 1 in MPEC 2013-L20 -- 2013 KY1
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2013-L20 & 2013-L25 -- 2013 LD2, 8013
510Siegen Obs. in Germany, 2 in MPEC 2013-L20 -- 2013 KN6, 285263
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2013-L20 -- 2013 JQ22
291Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2013-L20 -- 2013 KY5, 2013 KF6, 2013 JR28, 2013 JG29, 2013 JE1, 2013 HO11, 2013 GY7, 2009 LW2
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2013-L24 & 2013-L26 -- 2013 LC2, 2013 LB2
A92Urseanu Obs. in Romania, 1 in MPEC 2013-L20 -- 285263
718Wiggins Obs. in Utah, 3 in MPEC 2013-L20 -- 2013 JB36, 163249, 7888
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-L20 -- 285263
H06.Cristovao Jacques in Brazil via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-L24 -- 2013 LB2
H06Lprogram code "L" via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-L20 -- 2013 JB36
Q624program code 4 via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2013-L20 & 2013-L25 -- 2013 LD2, 163364
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 June '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2106 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 LC1JPL Sentry1355205216.7e-10-8.64-8.640JPL: "Analysis based on 12 observations spanning 1.9679 days (2013-Jun-02.39669 to 2013-Jun-04.3646)." Diameter approximately 0.057 km. from mean, weighted H=23.9.
NEODyS13552014-2110501.2e-09-6.46-7.140NEODyS: "Based on 8 optical observations (of which 0 are rejected as outliers) from 2013-06-02.397 to 2013-06-03.417."

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 5 June '13

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

2106Updated Traffic Report
1945Grabbed MPEC 2013-L23 - 2013 LA2 - see above
Grabbed MPEC 2013-L24 - 2013 LB2 - see above
Grabbed MPEC 2013-L25 - 2013 LD2 - see above
Grabbed MPEC 2013-L26 - 2013 LC2 - see above
1355Noted that JPL Sentry has posted 2013 LC1 as an impact risk - see above
Noted that NEODyS has posted 2013 LC1 as an impact risk - see above
Grabbed MPEC 2013-L20 - Daily Orbit Update - see above
Grabbed MPEC 2013-L21 - 2012 RG3 - see above
Grabbed MPEC 2013-L22 - 2011 HO60 - see above