Contents  on 22 September '11

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.

NEOCP Activity  on 22 September '11

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, 20 were "one nighters." So far The Tracking News has counted a total of 90 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 22 September '11

Minor Planet Electronic Circulars

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


MPEC 2011-S48 - "22:54 UT" - 2011 SS25


MPEC 2011-S47 - "22:45 UT" - 2011 SR25


MPEC 2011-S46 - "22:43 UT" - 2011 SQ25


MPEC 2011-S45 - "22:42 UT" - 2011 SP25


MPEC 2011-S44 - "22:40 UT" - 2011 SO25


MPEC 2011-S43 - "22:38 UT" - 2011 SN25


MPEC 2011-S42 - "22:23 UT" - 2011 SB25


MPEC 2011-S41 - "21:39 UT" - 2011 SF25


MPEC 2011-S40 - "21:37 UT" - 2011 SE25


MPEC 2011-S39 - "21:36 UT" - 2011 SD25


MPEC 2011-S38 - "21:34 UT" - 2011 SC25


MPEC 2011-S37 - "17:34 UT" - 2011 SA25


<< DOU on 22 Sept. '11 >>  MPEC 2011-S36 - "06:03 UT" - Daily Orbit Update


MPEC 2011-S35 - "03:16 UT" - 2011 SK16


MPEC 2011-S34 - "03:14 UT" - 2011 SJ16


MPEC 2011-S33 - "03:13 UT" - 2011 SH16


MPEC 2011-S32 - "03:11 UT" - 2011 SG16


MPEC 2011-S31 - "00:58 UT" - 2011 SF16


MPEC 2011-S30 - "00:57 UT" - 2011 SE16

Observers  on 22 September '11

A total of 37 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPECs 2011-S34, 2011-S36, 2011-S39 & 2011-S41 -- 2011 SJ16, 2011 SG5, 2011 SF25, 2011 SD25, 2011 QF3, 2011 PE2, 2011 LC19
C77Bernezzo Obs., 2 in MPEC 2011-S36 -- 1036, 433
300Bisei Spaceguard Center in Japan, 3 in MPECs 2011-S45, 2011-S47 & 2011-S48 -- 2011 SS25, 2011 SR25, 2011 SP25
703Catalina Sky Survey (CSS) in Arizona, 21 in MPECs 2011-S34, 2011-S36, 2011-S46, 2011-S47 & 2011-S48 -- 2011 SS25, 2011 SR25, 2011 SQ25, 2011 SJ16, 2011 QY37, 2011 QF14, 2011 PT1, 2009 QZ6, 2008 DH23, 2001 QP181, 96744, 90147, 90075, 223456, 138155, 137799, 105140, 7341, 7025, 5653, 4503
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 5 in MPECs 2011-S32, 2011-S33, 2011-S35 & 2011-S36 -- 2011 SP12, 2011 SK16, 2011 SH16, 2011 SG16, 2011 SF3
G58Chabot Obs. in northern California, 1 in MPEC 2011-S45 -- 2011 SP25
113Drebach Obs. in Germany, 3 in MPECs 2011-S32, 2011-S34 & 2011-S41 -- 2011 SJ16, 2011 SG16, 2011 SF25
639Dresden Obs. in Germany, 1 in MPEC 2011-S36 -- 2011 SR5
I19El Gato Gris Obs. in Argentina, 2 in MPECs 2011-S32 & 2011-S35 -- 2011 SK16, 2011 SG16
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2011-S36 -- 88188
151Eschenberg Obs. in Switzerland, 2 in MPEC 2011-S36 -- 2011 SR5, 2011 QY39
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2011-S47 & 2011-S48 -- 2011 SS25, 2011 SR25
F65$Ernesto Guido in Italy via Faulkes Telescope North in Hawaii, 2 in MPECs 2011-S34 & 2011-S46 -- 2011 SQ25, 2011 SJ16
J95Great Shefford Obs. in England, 2 in MPECs 2011-S45 & 2011-S47 -- 2011 SR25, 2011 SP25
A17Guidestar Obs. in Germany, 1 in MPEC 2011-S41 -- 2011 SF25
704LINEAR in New Mexico, 6 in MPECs 2011-S36 & 2011-S41 -- 2011 SF25, 2008 VH, 90075, 288914, 274855, 190208
J75La Sagra Obs. in Spain, 1 in MPEC 2011-S41 -- 2011 SF25
C01Lohrmann Obs. in Germany, 3 in MPEC 2011-S36 -- 37336, 36284, 138524
844Los Molinos Obs. in Uruguay, 4 in MPEC 2011-S36 -- 2011 SQ12, 2007 PH25, 2004 QJ7, 1991 TF3
5682David Tholen's team on Mauna Kea in Hawaii, 4 in MPECs 2011-S31, 2011-S36, 2011-S38 & 2011-S45 -- 2011 SP25, 2011 SF16, 2011 SC25, 2011 QF3
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2011-S36 -- 2011 SR5
G96Mt. Lemmon Survey (MLS) in Arizona, 15 in MPECs 2011-S30, 2011-S34, 2011-S36, 2011-S37, 2011-S39, 2011-S40, 2011-S42, 2011-S43 & 2011-S44 -- 5025 P-L, 2011 SO25, 2011 SN25, 2011 SJ16, 2011 SE25, 2011 SE16, 2011 SD25, 2011 SB25, 2011 SA25, 2011 QY39, 2011 QF3, 253841, 226514, 190788, 137044
A13Naef Obs. in Switzerland, 1 in MPEC 2011-S36 -- 274855
A24New Millennium Obs. in Italy, 17 in MPECs 2011-S36 & 2011-S47 -- 2011 SR5, 2011 SR25, 2011 OV4, 2011 LJ19, 2011 KN9, 2011 GA55, 2000 DQ110, 2000 AB6, 85804, 37336, 288914, 276274, 275545, 20086, 16960, 163760, 159399
F51Pan-STARRS 1 (PS1) in Hawaii, 14 in MPECs 2011-S31, 2011-S32, 2011-S33, 2011-S36, 2011-S37, 2011-S38, 2011-S42 & 2011-S45 -- 2011 SP5, 2011 SP25, 2011 SH16, 2011 SG16, 2011 SF16, 2011 SC25, 2011 SB25, 2011 SA25, 2011 QT2, 2011 HD63, 96189, 152685, 143678, 137044
B49Paus Obs. in Spain, 1 in MPEC 2011-S41 -- 2011 SF25
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 3 in MPECs 2011-S32, 2011-S34 & 2011-S35 -- 2011 SK16, 2011 SJ16, 2011 SG16
I20Rio Cuarto Obs. in Argentina, 2 in MPECs 2011-S34 & 2011-S35 -- 2011 SK16, 2011 SJ16
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2011-S36 -- 2011 QY39
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-S41 -- 2011 SF25
E12Siding Spring Survey in New South Wales, 1 in MPEC 2011-S35 -- 2011 SK16
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2011-S36 -- 152942
291Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2011-S30, 2011-S36, 2011-S37, 2011-S38, 2011-S42, 2011-S44 & 2011-S45 -- 2011 SR12, 2011 SP25, 2011 SO25, 2011 SE16, 2011 SC25, 2011 SB25, 2011 SA25, 2011 QY39, 2011 PF2, 2009 VO24
I93St. Pardon de Conques Obs. in France, 6 in MPECs 2011-S30, 2011-S31, 2011-S36, 2011-S41, 2011-S45, 2011-S46 & 2011-S47 -- 2011 SR25, 2011 SQ25, 2011 SP25, 2011 SF25, 2011 SF16, 2011 SE16
6731program code 1 via Table Mtn. Obs. in southern California, 1 in MPEC 2011-S36 -- 1036
B18Terskol Obs. in Russia, 11 in MPECs 2011-S30, 2011-S32, 2011-S33, 2011-S34, 2011-S35, 2011-S36, 2011-S41, 2011-S44, 2011-S45, 2011-S46 & 2011-S48 -- 2011 SZ15, 2011 SS25, 2011 SQ25, 2011 SP25, 2011 SO25, 2011 SK16, 2011 SJ16, 2011 SH16, 2011 SG16, 2011 SF25, 2011 SE16
A48Verona Obs. in Italy, 2 in MPEC 2011-S36 -- 2011 SR5, 2011 OV4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 September '11

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 CLOMON 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
2011 SR5NEODyS1600R E M O V E D-
2011 PE2NEODyS16002027-209034.53e-07-4.98-4.980NEODyS: "Based on 89 optical observations (of which 0 are rejected as outliers) from 2011-08-08.065 to 2011-09-21.193."

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 22 September '11

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

2310Grabbed MPEC 2011-S42 - 2011 SB25 - see above
Grabbed MPEC 2011-S43 - 2011 SN25 - see above
Grabbed MPEC 2011-S44 - 2011 SO25 - see above
Grabbed MPEC 2011-S45 - 2011 SP25 - see above
Grabbed MPEC 2011-S46 - 2011 SQ25 - see above
Grabbed MPEC 2011-S47 - 2011 SR25 - see above
Grabbed MPEC 2011-S48 - 2011 SS25 - see above
2207Grabbed MPEC 2011-S38 - 2011 SC25 - see above
Grabbed MPEC 2011-S39 - 2011 SD25 - see above
Grabbed MPEC 2011-S40 - 2011 SE25 - see above
Grabbed MPEC 2011-S41 - 2011 SF25 - see above
1900Grabbed MPEC 2011-S37 - 2011 SA25 - see above
1600Noted that NEODyS has updated its 2011 PE2 risk assessment - see above
Noted that NEODyS has removed 2011 SR5 as an impact risk - see above
Grabbed MPEC 2011-S36 - Daily Orbit Update - see above
0444Grabbed MPEC 2011-S31 - 2011 SF16 - see above
Grabbed MPEC 2011-S32 - 2011 SG16 - see above
Grabbed MPEC 2011-S33 - 2011 SH16 - see above
Grabbed MPEC 2011-S34 - 2011 SJ16 - see above
Grabbed MPEC 2011-S35 - 2011 SK16 - see above
0104Grabbed MPEC 2011-S30 - 2011 SE16 - see above