Contents  on 24 September '12

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 '12

One object reported inside ten LD

One object is reported passing inside ten lunar distances (LD) of our planet today. 2012 RK15 comes its closest to Earth on this passage, reaching 8.16 LD at 1653 UTC. Coming next, risk-listed 2012 SY49 arrives inside ten LD tomorrow and 2010 JK1 arrives on November 22nd.

This report was updated at 2222 UTC with new discovery 2012 SY49 (MPEC). Today's first traffic report was generated at 1510 UTC with follow-up in today's DOU MPEC for departed 2012 SU9, 2012 SB3, 2012 RR16, and 2012 QG42.


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 24 September '12

The MPC's NEO Confirmation Page has 11 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eleven objects listed. Of these, two were "one nighters." So far The Tracking News has counted a total of 23 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 '12

Minor Planet Electronic Circulars

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


MPEC 2012-S67 - "19:55 UT" - 2012 SZ49


MPEC 2012-S66 - "19:41 UT" - 2012 SY49


MPEC 2012-S65 - "19:39 UT" - 2012 SX49


MPEC 2012-S64 - "19:24 UT" - 2012 SW49


MPEC 2012-S63 - "18:40 UT" - Comet C/2012 S1 (ISON)


MPEC 2012-S62 - "17:27 UT" - 2011 JK


MPEC 2012-S61 - "17:25 UT" - 2009 QO8


<< DOU on 24 Sept. '12 >>  MPEC 2012-S60 - "06:03 UT" - Daily Orbit Update


MPEC 2012-S59 - "03:04 UT" - 2012 SJ32


MPEC 2012-S58 - "03:02 UT" - 2012 SH32


MPEC 2012-S57 - "03:00 UT" - 2012 SG32

Observers  on 24 September '12

A total of 25 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2012-S67 -- 2012 SZ49
H21Astronomical Research Obs. Westfield in Illinois, 20 in MPECs 2012-S57, 2012-S58, 2012-S60, 2012-S61, 2012-S62, 2012-S63, 2012-S64, 2012-S65, 2012-S66 & 2012-S67 -- 2012 SZ49, 2012 SY49, 2012 SX49, 2012 SW49, 2012 SU9, 2012 SM8, 2012 SK8, 2012 SH32, 2012 SG32, 2012 SB3, 2012 SB22, C/2012 S1, 2012 RR16, 2012 RM2, 2012 RH15, 2012 RH10, 2012 OO, 2012 JR17, 2011 JK, 2009 QO8
703Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2012-S58, 2012-S60 & 2012-S67 -- 2012 SZ49, 2012 SH32, 2012 BZ76
470Ceccano Obs. in Italy, 1 in MPEC 2012-S59 -- 2012 SJ32
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 9 in MPECs 2012-S57, 2012-S58, 2012-S60 & 2012-S67 -- 2012 SZ49, 2012 SH32, 2012 SG32, 2012 RF15, 2012 OU5, 2006 XG2, 1999 VS6, 1999 HA2, 137199
850Cordell-Lorenz Obs. in Tennessee, 2 in MPECs 2012-S60 & 2012-S63 -- C/2012 S1, 333889
448Desert Moon Obs. in New Mexico, 4 in MPEC 2012-S60 -- 2012 QQ50, 2012 QF49, 2008 TZ3, 4487
E100Tim Lister in southern California via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-S67 -- 2012 SZ49
157Frasso Sabino Obs. in Italy, 1 in MPEC 2012-S60 -- 2012 SW20
J95Great Shefford Obs. in England, 1 in MPEC 2012-S63 -- C/2012 S1
D00ISON-Kislovodsk Obs., 1 in MPEC 2012-S63 -- C/2012 S1
704LINEAR in New Mexico, 3 in MPECs 2012-S59, 2012-S60 & 2012-S63 -- 2012 SJ32, C/2012 S1, 4487
H01Magdalena Ridge Obs. (MRO) in New Mexico, 8 in MPECs 2012-S57, 2012-S58, 2012-S59, 2012-S63, 2012-S64, 2012-S65, 2012-S66 & 2012-S67 -- 2012 SZ49, 2012 SY49, 2012 SX49, 2012 SW49, 2012 SJ32, 2012 SH32, 2012 SG32, C/2012 S1
188Majdanak Obs. in Uzbekistan, 1 in MPEC 2012-S63 -- C/2012 S1
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-S60 -- 2005 UY6
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2012-S57, 2012-S58, 2012-S60, 2012-S63, 2012-S64 & 2012-S65 -- 2012 SX49, 2012 SW49, 2012 ST9, 2012 SH32, 2012 SG32, C/2012 S1, 3838
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2012-S63 -- C/2012 S1
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 11 in MPEC 2012-S60 -- 2012 SW20, 2012 SK8, 2012 QF49, 2012 QE50, 2012 QB17, 2012 PS17, 2012 OO, 2012 LE11, 2012 HO15, 2001 SG262, 87684
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-S63 -- C/2012 S1
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-S63 -- C/2012 S1
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 2 in MPECs 2012-S63 & 2012-S66 -- 2012 SY49, C/2012 S1
H36Sandlot Obs. in Kansas, 8 in MPECs 2012-S57, 2012-S58, 2012-S59, 2012-S63, 2012-S64, 2012-S65, 2012-S66 & 2012-S67 -- 2012 SZ49, 2012 SY49, 2012 SX49, 2012 SW49, 2012 SJ32, 2012 SH32, 2012 SG32, C/2012 S1
033Schwarzschild Obs. in Germany, 1 in MPEC 2012-S60 -- 2012 QG42
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2012-S60 -- 87024, 3757
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2012-S58, 2012-S60, 2012-S64, 2012-S65 & 2012-S66 -- 2012 SY49, 2012 SX49, 2012 SW49, 2012 SV9, 2012 SU9, 2012 SH32, 2012 RU16
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2012-S57 & 2012-S58 -- 2012 SH32, 2012 SG32
926Tenagra II Obs. in Arizona, 1 in MPEC 2012-S60 -- 285638
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 September '12

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
2012 SY49JPL Sentry22222031-203624.2e-08-7.21-7.250JPL: "Analysis based on 31 observations spanning 2.1109 days (2012-Sep-22.26616 to 2012-Sep-24.37708)." Diameter approximately 0.024 km. from mean, weighted H=25.7.
2012 SW20JPL Sentry1508204517.3e-09-5.23-5.230JPL: "Analysis based on 202 observations spanning 4.9873 days (2012-Sep-18.30064 to 2012-Sep-23.28796)." Diameter approximately 0.390 km. from mean, weighted H=19.7.
2012 SU9NEODyS16042082-210051.11e-07-8.23-8.570NEODyS: "Based on 36 optical observations (of which 0 are rejected as outliers) from 2012-09-19.226 to 2012-09-24.186."
JPL Sentry15082090-211171.5e-06-7.21-7.310JPL: "Analysis based on 36 observations spanning 4.9608 days (2012-Sep-19.22484 to 2012-Sep-24.18561)." Diameter approximately 0.012 km. from mean, weighted H=27.2.
2012 RU16NEODyS16042065-208921.95e-07-7.27-7.350NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2012-09-15.350 to 2012-09-24.212."
JPL Sentry15082032-210641.2e-06-6.46-6.700JPL: "Analysis based on 48 observations spanning 8.8618 days (2012-Sep-15.34955 to 2012-Sep-24.21131)." Diameter approximately 0.025 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 '12

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

2222Noted that JPL Sentry has posted 2012 SY49 as an impact risk - see above
Updated Traffic Report
2001Grabbed MPEC 2012-S64 - 2012 SW49 - see above
Grabbed MPEC 2012-S65 - 2012 SX49 - see above
Grabbed MPEC 2012-S66 - 2012 SY49 - see above
Grabbed MPEC 2012-S67 - 2012 SZ49 - see above
1916Grabbed MPEC 2012-S63 - Comet C/2012 S1 (ISON) - see above
1731Grabbed MPEC 2012-S61 - 2009 QO8 - see above
Grabbed MPEC 2012-S62 - 2011 JK - see above
1604Noted that NEODyS has updated its 2012 RU16 risk assessment - see above
Noted that NEODyS has updated its 2012 SU9 risk assessment - see above
1508Noted that JPL Sentry has updated its 2012 RU16 risk assessment - see above
Noted that JPL Sentry has updated its 2012 SU9 risk assessment - see above
Noted that JPL Sentry has reposted 2012 SW20 as an impact risk - see above
Grabbed MPEC 2012-S60 - Daily Orbit Update - see above
0431Grabbed MPEC 2012-S57 - 2012 SG32 - see above
Grabbed MPEC 2012-S58 - 2012 SH32 - see above
Grabbed MPEC 2012-S59 - 2012 SJ32 - see above