Pan-STARRS first NEO discovery, 
2010 ST3. Credit: PS1C.

This past Monday, the Institute for Astronomy at the University of Hawaii hailed the first Pan-STARRS' PHO discovery, noting that 2010 ST3 has one (highly preliminary) impact solution in the year 2098, and commenting that Pan-STARRS, which has been online for months, "is now the most sensitive system dedicated to discovering potentially dangerous asteroids." The discovery was reported nine days earlier in MPEC 2010-S20. Image credit: PS1C.


Contents  on 1 October '10

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 1 October '10

The MPC's NEO Confirmation Page has 14 listings: 14 updated

When last checked at 1856 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had fourteen updated listings. Of these, nine were "one nighters." So far The Tracking News has counted a total of nineteen listings on the NEOCP at some point 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 1 October '10

Minor Planet Electronic Circulars

As of last check at 1846 UTC, there have been four MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2010-T04 - "14:09 UT" - 2010 ST16


MPEC 2010-T03 - "13:47 UT" - 2010 SS16


MPEC 2010-T02 - "13:33 UT" - 2010 SR16


<< DOU on 1 Oct. '10 >>  MPEC 2010-T01 - "06:06 UT" - Daily Orbit Update

Observers  on 1 October '10

A total of 20 observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2010-T01 & 2010-T03 -- 2010 SS16, 2010 SK13, 2010 SH15
J51Atlante Obs. in the Canary Islands, 4 in MPEC 2010-T01 -- 2010 RN80, 2010 RC130, 2010 LY63, 2000 TJ1
160Castelmartini Obs. in Italy, 7 in MPEC 2010-T01 -- 2010 RN80, 2010 RC130, 2010 LY63, 2007 VG189, 2000 EY106, 237442, 143381
703Catalina Sky Survey (CSS) in Arizona, 12 in MPECs 2010-T01 & 2010-T02 -- 2010 SR16, 2010 RP80, 2010 RK43, 2010 RC130, 2010 RB130, 2010 PM10, 2007 RU17, 251346, 249595, 17182, 168378, 5143
G58Chabot Obs. in northern California, 3 in MPEC 2010-T01 -- 2010 RC12, 2010 PP2, 2010 PD57
448Desert Moon Obs. in New Mexico, 4 in MPEC 2010-T01 -- 2010 SV3, 2010 SA12, 2010 RG137, 161998
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 13 in MPEC 2010-T01 -- 2010 SX11, 2010 SJ, 2010 SD13, 2010 RP80, 2010 RN80, 2010 RK64, 2010 RK43, 2010 RC130, 2010 PM10, 2010 MR87, 2010 MF1, 2010 LY63, 2000 TJ1
J95Great Shefford Obs. in England, 1 in MPEC 2010-T01 -- 2010 SK13
G89Kachina Obs. in Arizona, 1 in MPEC 2010-T01 -- 2010 RA91
704LINEAR in New Mexico, 9 in MPEC 2010-T01 -- 2010 SK15, 2010 SJ13, 2010 SD13, 2010 RA91, 89355, 66146, 66008, 25916, 161998
J75La Sagra Obs. in Spain, 7 in MPEC 2010-T01 -- 2007 RU17, 65679, 29075, 249595, 19764, 4486, 2212
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2010-T01, 2010-T02, 2010-T03 & 2010-T04 -- 2010 ST16, 2010 SS16, 2010 SR16, 2010 SK13
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2010-T01, 2010-T03 & 2010-T04 -- 2010 SX11, 2010 ST16, 2010 SS16, 2010 RS3, 2010 RJ64
716Palmer Divide Obs. in Colorado, 1 in MPEC 2010-T01 -- 2010 RC130
H23Pear Tree Obs. in Florida, 1 in MPEC 2010-T01 -- 6239
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2010-T02 -- 2010 SR16
E12Siding Spring Survey in New South Wales, 1 in MPEC 2010-T01 -- 2010 SD13
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2010-T01 -- 2003 NO4, 144900
291Spacewatch 1.8m telescope in Arizona, 12 in MPECs 2010-T01, 2010-T02, 2010-T03 & 2010-T04 -- 2010 ST16, 2010 SS16, 2010 SR3, 2010 SR16, 2010 SL13, 2010 SK13, 2010 SG13, 2010 RR80, 2010 RH43, 2010 RF, 2010 PS66, 2010 LH14
C51WISE in Earth polar orbit, 2 in MPEC 2010-T01 -- 2004 FG11, 2002 FQ5
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 October '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 1846 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 (backup) 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
2010 SS16JPL Sentry15542058-208578.9e-09-7.26-7.420JPL: "Analysis based on 26 observations spanning 1.0452 days (2010-Sep-30.2195 to 2010-Oct-01.26472)." Diameter approximately 0.081 km. from mean, weighted H=23.1.
2010 SJ15NEODyS15002014-2090884.9e-09-5.78-6.180NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2010/09/29.301 to 2010/09/30.366."
2010 SH15JPL Sentry15002023-2107651.4e-07-5.54-6.070JPL: "Analysis based on 14 observations spanning .98587 days (2010-Sep-29.26958 to 2010-Sep-30.25545)." Diameter approximately 0.110 km. from mean, weighted H=22.4.
NEODyS15002032-208142.78e-08-6.22-6.300NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2010/09/29.270 to 2010/09/30.256."
2010 SF15NEODyS15002041-208132.37e-10-8.03-8.160NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2010/09/29.189 to 2010/09/30.197."
2010 SK13JPL Sentry1500R E M O V E DJPL: Risk listing removed at 0951 UTC.
NEODyS1500R E M O V E D-
2010 SG13JPL Sentry15002020-2100103.6e-09-4.30-4.680JPL: "Analysis based on 17 observations spanning 4.0170 days (2010-Sep-27.10646 to 2010-Oct-01.12346)." Diameter approximately 0.880 km. from mean, weighted H=17.9.
NEODyS15002027-2065168.81e-10-5.05-5.920NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2010/09/27.107 to 2010/10/01.124."

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 1 October '10

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

1554Noted that JPL Sentry has posted 2010 SS16 as an impact risk - see above
1500Noted that NEODyS has posted 2010 SF15 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 SG13 risk assessment - see above
Noted that NEODyS has updated its 2010 SG13 risk assessment - see above
Noted that JPL Sentry has updated its 2010 SH15 risk assessment - see above
Noted that NEODyS has posted 2010 SH15 as an impact risk - see above
Noted that NEODyS has posted 2010 SJ15 as an impact risk - see above
Noted that JPL Sentry has removed 2010 SK13 as an impact risk - see above
Noted that NEODyS has removed 2010 SK13 as an impact risk - see above
Grabbed MPEC 2010-T01 - Daily Orbit Update - see above
Grabbed MPEC 2010-T02 - 2010 SR16 - see above
Grabbed MPEC 2010-T03 - 2010 SS16 - see above
Grabbed MPEC 2010-T04 - 2010 ST16 - see above