Contents  on 5 July '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 July '13

Two objects reported inside ten LD

There are two asteroids reported moving inside ten lunar distances (LD) of Earth today. Newly announced 2013 NH4 is inbound from 5.71 to 4.39 LD and 2013 NJ4 from 5.11 to 4.44 LD.

This report was updated at 1831 UTC with new discoveries 2013 NJ4 (MPEC) and 2013 NH4 (MPEC). Today's first traffic report was generated at 1430 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 July '13

The MPC's NEO Confirmation Page has 31 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 31 objects listed. Of these, seventeen were "one nighters." So far The Tracking News has counted a total of 38 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 July '13

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 2013-N18 - "18:15 UT" - 2013 NH6


MPEC 2013-N17 - "18:11 UT" - 2013 NG6


MPEC 2013-N16 - "18:07 UT" - 2013 MP11


MPEC 2013-N15 - "15:37 UT" - 2013 NK4


MPEC 2013-N14 - "15:21 UT" - 2013 MV10


MPEC 2013-N13 - "14:57 UT" - 2013 NJ4


MPEC 2013-N12 - "14:53 UT" - 2013 NH4


<< DOU on 5 July '13 >>  MPEC 2013-N11 - "06:02 UT" - Daily Orbit Update

Observers  on 5 July '13

Nineteen observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 3 in MPECs 2013-N11, 2013-N15 & 2013-N18 -- 2013 NX, 2013 NK4, 2013 NH6
H21Astronomical Research Obs. Westfield in Illinois, 12 in MPECs 2013-N11, 2013-N14 & 2013-N17 -- 2013 NX, 2013 NW, 2013 NG6, 2013 MY6, 2013 MV10, 2013 MR6, 2013 ML3, 2013 LK31, 2013 LF16, 2013 KN6, 2013 GY68, 142555
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-N11 -- 144332
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 9 in MPECs 2013-N11, 2013-N15, 2013-N16, 2013-N17 & 2013-N18 -- 2013 NK4, 2013 NH6, 2013 NG6, 2013 MP11, 2013 MH7, 2013 LM31, 2013 KR1, 2013 JX2, 2013 ES89
Z81Estrella de Mar Obs., 1 in MPEC 2013-N11 -- 159609
203GiaGa Obs. in Italy, 2 in MPEC 2013-N11 -- 2013 LK31, 17188
J95Great Shefford Obs. in England, 3 in MPECs 2013-N11 & 2013-N13 -- 2013 NJ4, 2013 ML3, 2013 LN31
W85LCOGT Cerro Tololo A in Chile, 2 in MPECs 2013-N16 & 2013-N18 -- 2013 NH6, 2013 MP11
K91LCOGT Sutherland A in South Africa, 1 in MPEC 2013-N11 -- 2013 MD8
Q63MPC code Q63, 1 in MPEC 2013-N15 -- 2013 NK4
5682David Tholen's team on Mauna Kea in Hawaii, 5 in MPECs 2013-N11, 2013-N12 & 2013-N17 -- 2013 NJ, 2013 NH4, 2013 NG6, 2013 LZ28, 2013 LG16
568_Marco Micheli on Mauna Kea in Hawaii, 6 in MPECs 2013-N11, 2013-N12, 2013-N13, 2013-N14, 2013-N16 & 2013-N17 -- 2013 NJ4, 2013 NH4, 2013 NG6, 2013 MV10, 2013 MP11, 2013 MD8
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2013-N11 -- 2006 HB
C47Nonndorf Obs. in Austria, 2 in MPEC 2013-N11 -- 2013 MX5, 2013 LK31
557Ondrejov Obs. in the Czech Republic, 1 in MPEC 2013-N11 -- 163249
F51Pan-STARRS 1 (PS1) in Hawaii, 16 in MPECs 2013-N11, 2013-N12, 2013-N13, 2013-N14, 2013-N16 & 2013-N17 -- 2013 NJ4, 2013 NH4, 2013 NG6, 2013 MV10, 2013 MP11, 2013 MD8, 2011 BT15, 2003 WX87, 89959, 86666, 251722, 220839, 217837, 189973, 189630, 137199
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2013-N12, 2013-N15 & 2013-N18 -- 2013 NK4, 2013 NH6, 2013 NH4
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2013-N11 & 2013-N14 -- 2013 MV10, 2013 LM31, 2013 LF7
A79Zvezdno Obshtestvo Obs. in Bulgaria, 1 in MPEC 2013-N15 -- 2013 NK4
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-N12 -- 2013 NH4
Q624program code 4 via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-N11 -- 2013 KN6
Q625program code 5 via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-N15 -- 2013 NK4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 July '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 NH6JPL Sentry20052060-206549.9e-06-3.94-3.960JPL: "Analysis based on 20 observations spanning 1.8086 days (2013-Jul-03.642839 to 2013-Jul-05.451482)." Diameter approximately 0.070 km. from mean, weighted H=23.4.
2013 NK4JPL Sentry19092083-209925.9e-10-6.28-6.490JPL: "Analysis based on 37 observations spanning 2.4912 days (2013-Jul-01.78755 to 2013-Jul-04.27876)." Diameter approximately 0.607 km. from mean, weighted H=18.7.
2013 NWJPL Sentry14272046-2112246.7e-08-5.85-6.160JPL: "Analysis based on 13 observations spanning 1.8656 days (2013-Jul-02.34438 to 2013-Jul-04.209954)." Diameter approximately 0.111 km. from mean, weighted H=22.4.
NEODyS14272051-211131.77e-08-6.64-6.660NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2013-07-02.345 to 2013-07-04.211."
2013 NJNEODyS1427R E M O V E D-
2013 ML3JPL Sentry1427210942.5e-06-4.66-4.990JPL: "Analysis based on 130 observations spanning 15.758 days (2013-Jun-19.27039 to 2013-Jul-05.02862)." Diameter approximately 0.120 km. from mean, weighted H=22.3.
NEODyS14272109-210941.32e-05-3.95-4.040NEODyS: "Based on 132 optical observations (of which 6 are rejected as outliers) from 2013-06-19.271 to 2013-07-05.029."
2013 LG16NEODyS1427R E M O V E D-

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 July '13

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

2005Noted that JPL Sentry has posted 2013 NH6 as an impact risk - see above
1909Noted that JPL Sentry has posted 2013 NK4 as an impact risk - see above
Grabbed MPEC 2013-N18 - 2013 NH6 - see above
1831Updated Traffic Report
1814Grabbed MPEC 2013-N16 - 2013 MP11 - see above
Grabbed MPEC 2013-N17 - 2013 NG6 - see above
1556Grabbed MPEC 2013-N14 - 2013 MV10 - see above
Grabbed MPEC 2013-N15 - 2013 NK4 - see above
1509Grabbed MPEC 2013-N12 - 2013 NH4 - see above
Grabbed MPEC 2013-N13 - 2013 NJ4 - see above
1427Noted that NEODyS has removed 2013 LG16 as an impact risk - see above
Noted that JPL Sentry has updated its 2013 ML3 risk assessment - see above
Noted that NEODyS has updated its 2013 ML3 risk assessment - see above
Noted that NEODyS has removed 2013 NJ as an impact risk - see above
Noted that JPL Sentry has updated its 2013 NW risk assessment - see above
Noted that NEODyS has updated its 2013 NW risk assessment - see above
Grabbed MPEC 2013-N11 - Daily Orbit Update - see above