Contents  on 24 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 24 September '13

One object reported inside ten LD

One object is reported flying inside a radius of ten lunar distances (LD) from our planet today. Within Earth's Hill sphere, tiny risk-listed intruder 2013 RZ53, which may be an artificial object, is slowly outbound from 1.97 to 2.30 LD. No natural objects are known to be coming inside ten LD until mid-November.

This report was generated at 1454 UTC.



Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) is estimated to extend out to around 3.89 LD. 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 24 September '13

The MPC's NEO Confirmation Page has 29 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 29 objects listed. Of these, 20 were "one nighters." So far The Tracking News has counted a total of 46 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 24 September '13

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been four MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2013-S32 - "22:41 UT" - 2013 ST


MPEC 2013-S31 - "22:36 UT" - 2013 SS


MPEC 2013-S30 - "22:31 UT" - 2013 SR


<< DOU on 24 Sept. '13 >>  MPEC 2013-S29 - "06:02 UT" - Daily Orbit Update

Observers  on 24 September '13

A total of 41 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-S32 -- 2013 ST
H21Astronomical Research Obs. Westfield in Illinois, 17 in MPECs 2013-S29, 2013-S30, 2013-S31 & 2013-S32 -- 2013 ST, 2013 SS, 2013 SR, 2013 RZ73, 2013 RX80, 2013 RX73, 2013 RW73, 2013 RR5, 2013 RJ74, 2013 RJ43, 2013 RH74, 2013 RH43, 2013 RG21, 2013 RB6, 2013 QV1, 2013 QM10, 2013 QL10
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-S29 -- 2013 RH74
B88Bigmuskie Obs. in Italy, 2 in MPEC 2013-S29 -- 2013 SF, 2013 QJ10
821Bosque Alegre Obs. in Argentina, 1 in MPEC 2013-S32 -- 2013 ST
703Catalina Sky Survey (CSS) in Arizona, 5 in MPECs 2013-S29, 2013-S30 & 2013-S32 -- 2013 ST, 2013 SR, 2003 RM, 369986, 269690
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPECs 2013-S29 & 2013-S30 -- 2013 SR, 2013 RN43, 2013 RH36, 2013 RG74, 2013 RB30, 2013 RB21, 2013 QK48, 2013 QH48, 2013 QH10, 2013 LE16
448Desert Moon Obs. in New Mexico, 2 in MPECs 2013-S30 & 2013-S32 -- 2013 ST, 2013 SR
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 5 in MPECs 2013-S29 & 2013-S32 -- 2013 ST, 2013 SF, 2013 PN43, 2013 OM9, 2013 MX5
I48El Catalejo Obs. in Argentina, 1 in MPEC 2013-S32 -- 2013 ST
151Eschenberg Obs. in Switzerland, 1 in MPEC 2013-S32 -- 2013 ST
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2013-S30 -- 2013 SR
203GiaGa Obs. in Italy, 3 in MPECs 2013-S29 & 2013-S30 -- 2013 SR, 2013 QJ10, 2001 QC34
238Grorudalen Obs., 1 in MPEC 2013-S29 -- 141052
246KLENOT in the Czech Republic, 1 in MPEC 2013-S29 -- 2013 RB6
168Kourovskaya Obs. in Russia, 4 in MPEC 2013-S29 -- 2013 HG20, 2009 CP5, 371660, 329437
J75La Sagra Obs. in Spain, 1 in MPEC 2013-S32 -- 2013 ST
G38La Senda Obs., 1 in MPEC 2013-S29 -- 269690
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2013-S31 & 2013-S32 -- 2013 ST, 2013 SS
C10Maisoncelles Obs. in France, 1 in MPEC 2013-S29 -- 433
B67Mirasteilas Obs. in Switzerland, 4 in MPEC 2013-S29 -- 2013 RW73, 2013 QJ10, 2012 TS, 2008 SQ1
900Moriyama Obs. in Japan, 1 in MPEC 2013-S32 -- 2013 ST
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2013-S29 & 2013-S31 -- 2013 SS, 2013 RR5, 2013 RJ36, 2010 RT11, 138205
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2013-S29 -- 2013 PV6
A13Naef Obs. in Switzerland, 3 in MPEC 2013-S29 -- 2013 RW73, 2013 RV9, 2013 PO43
C23Olmen Obs. in Belgium, 1 in MPEC 2013-S29 -- 2012 TS
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2013-S29 -- 162269
F51Pan-STARRS 1 (PS1) in Hawaii, 7 in MPEC 2013-S29 -- 2011 QD48, 2008 HO3, 365246, 250697, 154276, 143678, 8013
A53Peschiera del Garda Obs. in Italy, 3 in MPEC 2013-S29 -- 2013 MX5, 2012 TS, 250620
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2013-S29 -- 2013 SF, 2013 PX6, 2009 WE253
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2013-S32 -- 2013 ST
C95SATINO-1 in France, 1 in MPEC 2013-S29 -- 433
H36Sandlot Obs. in Kansas, 2 in MPECs 2013-S30 & 2013-S32 -- 2013 ST, 2013 SR
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2013-S29 -- 2012 LF11
G403program code 3 via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2013-S29 -- 2008 HB38
J84South Obs. in England, 1 in MPEC 2013-S29 -- 2013 RX80
691Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2013-S29 -- 2013 RX73, 2013 RK43, 2013 RJ36, 2013 PH3, 3352
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2013-S30 & 2013-S32 -- 2013 ST, 2013 SR
G56Walnut Creek Obs. in northern California, 1 in MPEC 2013-S32 -- 2013 ST
I42Westport Obs. in Massachusetts, 1 in MPEC 2013-S29 -- 2013 OM9
H06`Erik Bryssinck in Belgium via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-S29 -- 433
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 September '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 RJ74NEODyS1453R E M O V E D-
JPL Sentry1453R E M O V E DJPL: Risk listing removed at 1212 UTC.
2013 HT150JPL Sentry04052022-21121212.0e-05-4.98-5.710JPL: "Analysis based on 10 observations spanning 2.8625 days (2013-Apr-16.3367 to 2013-Apr-19.19918)." Diameter approximately 0.026 km. from mean, weighted H=25.6.

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 24 September '13

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

2321Grabbed MPEC 2013-S30 - 2013 SR - see above
Grabbed MPEC 2013-S31 - 2013 SS - see above
Grabbed MPEC 2013-S32 - 2013 ST - see above
1454Generated Traffic Report
1453Noted that JPL Sentry has removed 2013 RJ74 as an impact risk - see above
Noted that NEODyS has removed 2013 RJ74 as an impact risk - see above
Grabbed MPEC 2013-S29 - Daily Orbit Update - see above
0405Noted that JPL Sentry has updated its 2013 HT150 risk assessment - see above