Contents  on 25 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 25 September '13

One object reported inside ten LD

One tiny, possibly artificial object is reported to be traveling within ten lunar distances (LD) of our home world today. Inside Earth's Hill sphere, risk-listed intruder 2013 RZ53 is outbound from 2.30 to 2.62 LD. No natural objects are known to be coming inside ten LD until mid-November.

This report was generated at 1531 UTC with follow-up in today's DOU MPEC for departed 2013 PR43 and risk listed 2013 RR43.



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 25 September '13

The MPC's NEO Confirmation Page has 21 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 21 objects listed. Of these, eleven 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 25 September '13

Minor Planet Electronic Circulars

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


MPEC 2013-S46 - "23:05 UT" - 2013 SY19


MPEC 2013-S45 - "23:00 UT" - 2013 SX19


MPEC 2013-S44 - "22:56 UT" - 2013 SW19


MPEC 2013-S43 - "22:49 UT" - 2013 SV19


MPEC 2013-S42 - "22:45 UT" - 2013 SU19


MPEC 2013-S41 - "22:40 UT" - 2013 ST19


MPEC 2013-S40 - "22:33 UT" - 2013 SS19


MPEC 2013-S39 - "22:29 UT" - 2013 SR19


MPEC 2013-S38 - "22:24 UT" - 2013 SQ19


MPEC 2013-S37 - "22:20 UT" - 2013 SP19


MPEC 2013-S36 - "22:16 UT" - 2013 SO19


MPEC 2013-S35 - "22:11 UT" - 2013 SL19


MPEC 2013-S34 - "22:06 UT" - 2013 SK19


<< DOU on 25 Sept. '13 >>  MPEC 2013-S33 - "06:03 UT" - Daily Orbit Update

Observers  on 25 September '13

A total of 33 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 2 in MPECs 2013-S36 & 2013-S41 -- 2013 ST19, 2013 SO19
H21Astronomical Research Obs. Westfield in Illinois, 19 in MPECs 2013-S33, 2013-S34 & 2013-S36 -- 2013 SO19, 2013 SK19, 2013 SF, 2013 RX80, 2013 RR5, 2013 RM43, 2013 RL21, 2013 RK16, 2013 RJ74, 2013 RH43, 2013 RB74, 2013 RB6, 2013 QL10, 2013 PR43, 2013 PK67, 2013 NK, 2013 JK22, 2001 SQ263, 142781
B88Bigmuskie Obs. in Italy, 1 in MPEC 2013-S33 -- 2013 SF
300Bisei Spaceguard Center in Japan, 1 in MPEC 2013-S36 -- 2013 SO19
160Castelmartini Obs. in Italy, 9 in MPECs 2013-S33, 2013-S36 & 2013-S40 -- 2013 ST, 2013 SS19, 2013 SO19, 2013 RH74, 2013 PX6, 2013 HG20, 2011 WU95, 2005 EF, 237805
703Catalina Sky Survey (CSS) in Arizona, 15 in MPECs 2013-S33, 2013-S36 & 2013-S45 -- 2013 SX19, 2013 SO19, 2013 RH74, 2013 HG20, 2005 EF, 2001 SQ263, 88710, 65733, 52760, 373135, 354182, 303262, 276786, 7753, 5143
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 11 in MPECs 2013-S33, 2013-S35, 2013-S36, 2013-S40 & 2013-S41 -- 2013 ST19, 2013 SS19, 2013 SO19, 2013 SL19, 2013 RX73, 2013 RN43, 2013 RM21, 2013 RH36, 2013 PW14, 2013 PH3, 2013 PB39
A77Chante-Perdrix Obs. in France, 1 in MPEC 2013-S33 -- 433
970Chelmsford Obs. in England, 1 in MPEC 2013-S34 -- 2013 SK19
448Desert Moon Obs. in New Mexico, 4 in MPECs 2013-S33, 2013-S36 & 2013-S45 -- 2013 SX19, 2013 SO19, 2012 ER14, 280136
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 5 in MPECs 2013-S33, 2013-S36, 2013-S40 & 2013-S45 -- 2013 SX19, 2013 SS19, 2013 SO19, 2013 RX80, 2013 RH74
151Eschenberg Obs. in Switzerland, 4 in MPECs 2013-S33, 2013-S36, 2013-S40 & 2013-S45 -- 2013 SX19, 2013 SS19, 2013 SO19, 2013 QJ10
E102Ernesto Guido in Italy via Faulkes Telescope South in New South Wales, 1 in MPEC 2013-S46 -- 2013 SY19
203GiaGa Obs. in Italy, 1 in MPEC 2013-S36 -- 2013 SO19
J95Great Shefford Obs. in England, 1 in MPEC 2013-S34 -- 2013 SK19
246KLENOT in the Czech Republic, 1 in MPEC 2013-S33 -- 2013 RK21
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 10 in MPEC 2013-S33 -- 2013 HP11, 2013 GN3, 2013 EQ4, 2013 AN20, 2013 AF4, 2012 TY52, 2011 WO4, 2011 EG17, 2010 CF19, 2009 WM1
V37LCOGT Fort Davis in Texas, 1 in MPEC 2013-S34 -- 2013 SK19
K92LCOGT Sutherland B in South Africa, 1 in MPEC 2013-S41 -- 2013 ST19
G38La Senda Obs., 1 in MPEC 2013-S36 -- 2013 SO19
K38M57 Obs., 1 in MPEC 2013-S33 -- 2013 RH74
H01Magdalena Ridge Obs. (MRO) in New Mexico, 10 in MPECs 2013-S33, 2013-S34, 2013-S35, 2013-S36, 2013-S37, 2013-S38, 2013-S39, 2013-S42 & 2013-S43 -- 2013 SV19, 2013 SU19, 2013 SR19, 2013 SQ19, 2013 SP19, 2013 SO19, 2013 SL19, 2013 SK19, 2013 RR43, 2001 SQ263
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2013-S33 -- 2013 QN17, 2012 LF11
900Moriyama Obs. in Japan, 2 in MPECs 2013-S36 & 2013-S45 -- 2013 SX19, 2013 SO19
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2013-S33, 2013-S35, 2013-S36, 2013-S37, 2013-S38, 2013-S39, 2013-S40, 2013-S42, 2013-S43, 2013-S44 & 2013-S46 -- 2013 SY19, 2013 SW19, 2013 SV19, 2013 SU19, 2013 SS19, 2013 SR19, 2013 SQ19, 2013 SP19, 2013 SO19, 2013 SL19, 2013 RJ74, 65733
F51Pan-STARRS 1 (PS1) in Hawaii, 11 in MPECs 2013-S33, 2013-S34, 2013-S36, 2013-S40 & 2013-S41 -- 2013 ST19, 2013 SS19, 2013 SO19, 2013 SK19, 1999 SK10, 85818, 54789, 137126, 9950, 4197, 3352
A53Peschiera del Garda Obs. in Italy, 2 in MPEC 2013-S33 -- 2013 RH74, 2013 QJ10
K70Rosarno Obs., 1 in MPEC 2013-S33 -- 433
233San Vito Obs. in Italy, 1 in MPEC 2013-S33 -- 250620
H36Sandlot Obs. in Kansas, 7 in MPECs 2013-S33, 2013-S34, 2013-S36, 2013-S38, 2013-S40, 2013-S41 & 2013-S45 -- 2013 SX19, 2013 ST19, 2013 SS19, 2013 SQ19, 2013 SO19, 2013 SK19, 2001 SQ263
204Schiaparelli Obs. in Italy, 1 in MPEC 2013-S34 -- 2013 SK19
G404program code 4 via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2013-S33 -- 433
691Spacewatch 0.9m telescope in Arizona, 9 in MPECs 2013-S33 & 2013-S43 -- 2013 SV19, 2013 RN21, 2013 RK43, 2013 RK16, 2013 RJ74, 2013 RJ43, 2013 RJ36, 2013 RD32, 2013 QK48
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 25 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 RR43JPL Sentry15302050-205721.4e-07-6.73-6.810JPL: "Analysis based on 26 observations spanning 14.838 days (2013-Sep-09.46134 to 2013-Sep-24.29896)." Diameter approximately 0.028 km. from mean, weighted H=25.4.
NEODyS15302050-208631.73e-07-6.63-6.70NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2013-09-09.462 to 2013-09-24.300."

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 25 September '13

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

2359Grabbed MPEC 2013-S45 - 2013 SX19 - see above
Grabbed MPEC 2013-S46 - 2013 SY19 - see above
2300Grabbed MPEC 2013-S34 - 2013 SK19 - see above
Grabbed MPEC 2013-S35 - 2013 SL19 - see above
Grabbed MPEC 2013-S36 - 2013 SO19 - see above
Grabbed MPEC 2013-S37 - 2013 SP19 - see above
Grabbed MPEC 2013-S38 - 2013 SQ19 - see above
Grabbed MPEC 2013-S39 - 2013 SR19 - see above
Grabbed MPEC 2013-S40 - 2013 SS19 - see above
Grabbed MPEC 2013-S41 - 2013 ST19 - see above
Grabbed MPEC 2013-S42 - 2013 SU19 - see above
Grabbed MPEC 2013-S43 - 2013 SV19 - see above
Grabbed MPEC 2013-S44 - 2013 SW19 - see above
1531Generated Traffic Report
1530Noted that JPL Sentry has updated its 2013 RR43 risk assessment - see above
Noted that NEODyS has updated its 2013 RR43 risk assessment - see above
Grabbed MPEC 2013-S33 - Daily Orbit Update - see above