Contents  on 10 September '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 10 September '13

One object reported inside ten LD

There is one object reported to be within ten lunar distances (LD) of Earth today. 2013 QE16 is outbound from 9.37 to 9.90 LD and no other objects are known to be coming this close until mid-November.

This report was generated at 1530 (corrected at 1616) UTC with follow-up in today's DOU MPEC for departed objects 2013 RE32 (first follow-up), intruder 2013 PJ10, and radar target 277475 2005 WK4, plus observation of risk-listed 2013 HT14 from May and of distant radar target 152664 1998 FW4 (described as "distant" because it isn't coming inside ten LD on this passage).



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 10 September '13

The MPC's NEO Confirmation Page has 19 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had nineteen objects listed. Of these, ten were "one nighters." So far The Tracking News has counted a total of 24 listings on the NEOCP today.

New MPECs  on 10 September '13

Minor Planet Electronic Circulars

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


MPEC 2013-R78 - "21:57 UT" - 2013 RH36


MPEC 2013-R77 - "21:52 UT" - 2013 RJ36


MPEC 2013-R76 - "16:20 UT" - 2013 RG36


MPEC 2013-R75 - "16:15 UT" - 2013 RF36


<< DOU on 10 Sept. '13 >>  MPEC 2013-R74 - "06:04 UT" - Daily Orbit Update


MPEC 2013-R73 - "00:03 UT" - 2013 RE36

Observers  on 10 September '13

A total of 24 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 19 in MPECs 2013-R74, 2013-R76, 2013-R77 & 2013-R78 -- 2013 RY5, 2013 RV9, 2013 RU9, 2013 RS9, 2013 RM21, 2013 RJ36, 2013 RH36, 2013 RG36, 2013 RG21, 2013 RE6, 2013 RE32, 2013 RB6, 2013 RB30, 2013 QJ10, 2013 QE11, 2013 PX6, 2013 PJ10, 2008 JR26, 194386
C77Bernezzo Obs. in Italy, 2 in MPEC 2013-R74 -- 329437, 152664
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2013-R75 -- 2013 RF36
A27Eridanus Obs. in Germany, 3 in MPEC 2013-R74 -- 2013 QJ10, 2013 PX6, 9950
J95Great Shefford Obs. in England, 2 in MPECs 2013-R73 & 2013-R78 -- 2013 RH36, 2013 RE36
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2013-R74 -- 20826
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2013-R77 -- 2013 RJ36
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2013-R78 -- 2013 RH36
K93LCOGT Sutherland C in South Africa, 2 in MPECs 2013-R75 & 2013-R76 -- 2013 RG36, 2013 RF36
950.Ovidiu Vaduvescu via La Palma in the Canary Islands, 5 in MPEC 2013-R74 -- 2011 WM2, 2011 UF21, 2011 SB25, 2009 BK71, 2001 AV43
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-R74 -- 2013 HT14
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2013-R73 -- 2013 RE36
474Mt. John Obs. in New Zealand, 3 in MPEC 2013-R74 -- 2013 RB30, 2013 PY38, 2013 PD21
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2013-R75 & 2013-R76 -- 2013 RG36, 2013 RF36
A24New Millennium Obs. in Italy, 36 in MPEC 2013-R74 -- 2013 QJ10, 2013 PX6, 2013 PV6, 2013 PN43, 2013 OM9, 2013 NX23, 2013 MX5, 2013 HG20, 2010 TN54, 2009 CP5, 2003 OB4, 88710, 85804, 66008, 65733, 361071, 359592, 355256, 350988, 340666, 276786, 250620, 250458, 24445, 220909, 21088, 162566, 162510, 141052, 105140, 10115, 9950, 6063, 5143, 4450, 2100
I61Ourense Obs., 1 in MPEC 2013-R74 -- 4183
F51Pan-STARRS 1 (PS1) in Hawaii, 13 in MPECs 2013-R74, 2013-R77 & 2013-R78 -- 2013 RJ36, 2013 RH36, 2013 PU13, 2013 OU3, 2006 UD63, 2001 CK42, 368664, 269690, 154276, 152664, 143678, 4769, 4197
A53Peschiera del Garda Obs. in Italy, 3 in MPEC 2013-R74 -- 2013 PN43, 2013 OM9, 2010 TN54
Y00SONEAR Obs. in Brazil, 33 in MPEC 2013-R74 -- 2013 QJ36, 2013 OM9, 2011 QD48, 2010 UX95, 2010 TN54, 2010 CF19, 2009 WE253, 2009 SK1, 2009 DM1, 2002 RH52, 1996 TP6, 65733, 54789, 52762, 39565, 368664, 303262, 277475, 275677, 269690, 250620, 243147, 242450, 232691, 20826, 159699, 152664, 143678, 140039, 137126, 8013, 4486, 3691
H36Sandlot Obs. in Kansas, 2 in MPECs 2013-R77 & 2013-R78 -- 2013 RJ36, 2013 RH36
K90Sopot Obs., 5 in MPEC 2013-R74 -- 2013 QJ10, 2013 PN43, 2013 OM9, 2013 NX23, 2007 CN26
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2013-R74 -- 2013 QY1
B18Terskol Obs. in Russia, 1 in MPEC 2013-R75 -- 2013 RF36
A48Verona Obs. in Italy, 2 in MPEC 2013-R74 -- 2013 PN43, 2008 JR26
I42Westport Obs. in Massachusetts, 2 in MPEC 2013-R74 -- 2013 QJ10, 2013 PN43
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 September '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2319 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 HT14JPL Sentry15252043-207721.4e-06-6.29-6.350JPL: "Analysis based on 24 observations spanning 16.190 days (2013-Apr-21.25884 to 2013-May-07.449076)." Diameter approximately 0.019 km. from mean, weighted H=26.3.
NEODyS15252071-207731.5e-06-6.28-6.390NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2013-04-21.260 to 2013-05-07.450."
2008 EM68JPL Sentry04182013-21105644.6e-06-5.76-6.280JPL: "Analysis based on 11 observations spanning .11019 days (2008-Mar-08.25164 to 2008-Mar-08.36183)." Diameter approximately 0.010 km. from mean, weighted H=27.5.
2001 AV43JPL Sentry1525R E M O V E DJPL: Risk listing removed at 1250 UTC.

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 10 September '13

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

2319Grabbed MPEC 2013-R78 - 2013 RH36 - see above
2154Grabbed MPEC 2013-R77 - 2013 RJ36 - see above
1744Grabbed MPEC 2013-R76 - 2013 RG36 - see above
1617Grabbed MPEC 2013-R75 - 2013 RF36 - see above
1530Generated Traffic Report
1525Noted that JPL Sentry has removed 2001 AV43 as an impact risk - see above
Noted that JPL Sentry has updated its 2013 HT14 risk assessment - see above
Noted that NEODyS has updated its 2013 HT14 risk assessment - see above
Grabbed MPEC 2013-R74 - Daily Orbit Update - see above
0418Noted that JPL Sentry has updated its 2008 EM68 risk assessment - see above
0018Grabbed MPEC 2013-R73 - 2013 RE36 - see above