2010-09-18 Tracking News

Contents on 18 September '10

IAU Minor Planet Center
- NEOCP Activity -- 18 listings: 6 new, 12 updated
- New MPECs -- five MPECs
Observers -- eighteen observing facilities
Impact Risk Monitoring -- six objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Of 333 risk-listed objects, 24 have had news in the last 30 days. Updated at 1528 UTC.
Earth's Busy Neighborhood Traffic Report
Two objects are known to be within ten LD of Earth today. Updated at 1924 UTC.
Ephemerides for risk-rated and nearby objects
News image catalog
Old & new CRT Archive
Old News Archive & Small Objects Archive

The latest A/CC news is available via framed access, 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 18 September '10

The MPC's NEO Confirmation Page has 18 listings: 6 new, 12 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six new and twelve updated listings. Of these, fifteen were "one nighters." So far The Tracking News has counted a total of 25 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 18 September '10

Minor Planet Electronic Circulars

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

MPEC 2010-S16 time-stamped "03:53 UT" - 2010 SP3 - see below
MPEC 2010-S17 time-stamped "06:10 UT" - Daily Orbit Update - see below
MPEC 2010-S18 time-stamped "21:50 UT" - 2010 SR3 - see below
MPEC 2010-S19 time-stamped "21:53 UT" - 2010 SS3 - see below
MPEC 2010-S20 time-stamped "21:58 UT" - 2010 ST3

MPEC 2010-S20 - "21:58 UT" - 2010 ST3

K10S03T 2010 ST3 (small asteroid, H=25.1 ~32m) was discovered at 1141 UT on 16 Sept. by Pan-STARRS 1 (PS1), which observed it at Sept. 16.49-52p4 at w=22.1-3. The discovery was confirmed by Astronomical Research Obs. Westfield (Sept. 18.19-23p3) and the Spacewatch 1.8m telescope (Sept. 18.28p3).

MPEC 2010-S19 - "21:53 UT" - 2010 SS3

K10S03S 2010 SS3 (H=20.8 ~234m) was discovered at 1033 UT on 16 Sept. by the Mt. Lemmon Survey (MLS), which observed it at Sept. 16.44-46p4 at V=21.4-6, 17.40-42p3 at V=21.7-22.4, and 18.38-40p4 at V=21.2-22.1. The discovery was confirmed by ARO Westfield (Sept. 17.30-34p5 at V=21.2-22.2) and Spacewatch 1.8m (Sept. 18.39p2 at V=22.2).

MPEC 2010-S18 - "21:50 UT" - 2010 SR3

K10S03R 2010 SR3 (borderline-small, H=21.8 ~148m) was discovered at 1033 UT on 16 Sept. by MLS, which observed it at Sept. 16.44-46p4 at V=21.5-22.1, 17.40-43p4 at V=21.4-7, and 18.38-40p4 at V=21.4-22.9. The discovery was confirmed by ARO Westfield (Sept. 17.38-42p3 at V=22.1-4) and Spacewatch 1.8m (Sept. 18.37-38p3 at V=21.6-22.1).

<< DOU on 18 Sept. '10 >> MPEC 2010-S17 - "06:10 UT" - Daily Orbit Update

Observations of risk-listed objects
K10S00D 2010 SD (small asteroid, arc=2 days, H=24.6 ~41m) from ARO Westfield (Sept. 17.15-17p3), the Catalina Sky Survey (CSS) (Sept. 17.22-24p4), LINEAR (Sept. 17.29-34p5), and Spacewatch 1.8m (Sept. 18.14p3)
K10RD0D 2010 RD130 (small asteroid, arc=2 days, H=25.5 ~27m) from MLS (Sept. 17.32-34p4)
K10RD0C 2010 RC130 (arc=3 days, H=21.7 ~155m) from Spacewatch 1.8m (Sept. 17.36-37p3 & 18.12-13p2)
K10R91A 2010 RA91 (small asteroid, arc=4 days, H=23.4 ~71m) from ARO Westfield (Sept. 17.20p3), Kachina Obs. (Sept. 17.28-30p3), and Spacewatch 1.8m (Sept. 17.38-39p3)
K10R80M 2010 RM80 (small asteroid, arc=6 days, H=27.9 ~9m) from ARO Westfield (Sept. 17.30-33p3)
K10R53K 2010 RK53 from ARO Westfield (Sept. 17.34-37p3 at V=21.9-22.2)
Observations of recently (no longer) risk-listed objects
K10Q02E 2010 QE2 (i=64.9°, Q=5.915 AU, arc=23 days, H=17.7 ~977m) from Los Molinos Obs. (Sept. 17.24-26p20)
Observations of small asteroids (H>22.0)
K10S00E 2010 SE (arc=2 days, H=24.1 ~51m) from LINEAR (Sept. 16.36-41p5), Great Shefford Obs. (Sept. 17.99-00p3), and Guidestar Obs. (Sept. 18.06-08p3)
K10S00C 2010 SC (arc=1 day, H=26.0 ~21m) from LINEAR (Sept. 17.30-34p4)
K10RD0B 2010 RB130 (arc=1 day, H=24.0 ~54m) from LINEAR (Sept. 16.23-28p5)
K10R64J 2010 RJ64 (arc=7 days, H=24.0 ~54m) from MLS (Sept. 17.27-29p4) and Spacewatch 1.8m (Sept. 17.39-40p3)
K10R31D 2010 RD31 (arc=12 days, H=22.5 ~107m) from Spacewatch 1.8m (Sept. 17.30-31p3)
K10R00C 2010 RC (arc=16 days, H=26.4 ~18m) from Spacewatch 1.8m (Sept. 17.41-42p3 at V=22.4)
Observations of almost-small asteroids (21.7<H<=22.0)
K10N01R 2010 NR1 (arc=72 days, H=21.8 ~148m) from Tanti Obs. (Sept. 18.22-23p3)
Observations of other objects
K10R80P 2010 RP80 (Q=4.937 AU, arc=7 days, H=20.7 ~245m) from MLS (Sept. 17.33-35p4)
K10R42G 2010 RG42 (arc=12 days, H=21.4 ~178m) from Spacewatch 1.8m (Sept. 17.31-35p5)
K10P02P 2010 PP2 (arc=45 days, H=21.1 ~204m) from CSS (Sept. 17.22-24p4)
K10N03G 2010 NG3 (Q=4.084 AU, arc=71 days, H=17.2 ~1.23 km) from Tanti Obs. (Sept. 18.19-20p3)
K10M01F 2010 MF1 (arc=90 days, H=19.7 ~389m) from Lumezzane Obs. (Sept. 15.95p4)
K10L63Y 2010 LY63 (arc=4 opp, H=17.7 ~977m) from Hamamatsu-Yuto Obs. (Sept. 17.45-47p4 & 17.55-57p4)
K10K39Y 2010 KY39 (arc=123 days, H=20.6 ~257m) from CSS (Sept. 17.42-44p4)
K07T18Y 2007 TY18 (arc=3 opp, H=18.3 ~741m) from Hamamatsu-Yuto Obs. (Sept. 17.58-62p6)
K05G59E 2005 GE59 (arc=4 opp, H=18.0 ~851m) from CSS (Sept. 17.42p4)
K05A00C 2005 AC (i=46.9°, arc=5 opp, H=18.1 ~812m) from CSS (Sept. 18.14-16p4)
K03YB8G 2003 YG118 (arc=6 opp, H=17.1 ~1.29 km) from Spacewatch 1.8m (Sept. 17.48-49p3 at V=23)
K00P27Q 2000 PQ27 (arc=2 opp, H=19.9 ~355m) from Lumezzane Obs. (Sept. 15.94p4) and CSS (Sept. 17.25-27p4)
J99T05B 1999 TB5 (arc=4 opp, H=18.9 ~562m) from LINEAR (Sept. 17.35-40p5)
J97G03L 1997 GL3 (Q=4.057 AU, arc=2 opp, H=19.1 ~513m) from Lumezzane Obs. (Sept. 15.99p4) and Hamamatsu-Yuto Obs. (Sept. 17.65-69p10)
J9145 199145 2005 YY128 from LINEAR (Sept. 17.43-47p4)
G2269 162269 1999 VO6 from Blackrock Castle Obs. (Sept. 16.89-91p2)
F2952 152952 2000 GC2 from Lumezzane Obs. (Sept. 16.00-01p4)
E3381 143381 2003 BC21 from CSS (Sept. 17.22-24p4)
65679 65679 1989 UQ from AZT-8 Evpatoria (Sept. 11.00-06p8) and MLS (Sept. 17.44-46p4)
29075 29075 1950 DA from the Spacewatch 0.9m telescope (Sept. 17.20-24p3)
23187 23187 2000 PN9 from Aljaraque Obs. (Sept. 17.91p1 & 17.97p1)
20826 20826 2000 UV13 from CSS (Sept. 17.43-45p4)
12538 12538 1998 OH from Lumezzane Obs. (Sept. 16.01-02p3)
05869 5869 Tanith (1988 VN4) from LINEAR (Sept. 17.36-41p5)
05143 5143 Heracles (1991 VL) from AZT-8 (Sept. 11.77-83p8 & 12.81-87p8)
02212 2212 Hephaistos (1978 SB) from AZT-8 (Sept. 11.84-90p8 & 12.95-00p6) and Vicksburg Obs. (Sept. 17.33p3)

MPEC 2010-S16 - "03:53 UT" - 2010 SP3

K10S03P 2010 SP3 (small asteroid, Earth MOID=1.4 LD, H=24.6 ~41m) was discovered at 1014 UT on 17 Sept. by CSS, which observed it at Sept. 17.43-49p12. The discovery was confirmed by Great Shefford Obs. (Sept. 17.97p3) and Guidestar Obs. (Sept. 17.99-00p3). This object was within ten lunar distances (LD) of Earth, reaching 5.5 LD on 13 Sept.

Observers on 18 September '10

Eighteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`B17`	AZT-8 Evpatoria in the Ukraine, 3 in MPEC 2010-S17 -- 65679, 5143, 2212
`J32`	Aljaraque Obs. in Spain, 1 in MPEC 2010-S17 -- 23187
`H21`	Astronomical Research Obs. Westfield in Illinois, 7 in MPECs 2010-S17, 2010-S18, 2010-S19 & 2010-S20 -- 2010 ST3, 2010 SS3, 2010 SR3, 2010 SD, 2010 RM80, 2010 RK53, 2010 RA91
`I90`	Blackrock Castle Obs., 1 in MPEC 2010-S17 -- 162269
`703`	Catalina Sky Survey (CSS) in Arizona, 9 in MPECs 2010-S16 & 2010-S17 -- 2010 SP3, 2010 SD, 2010 PP2, 2010 KY39, 2005 GE59, 2005 AC, 2000 PQ27, 20826, 143381
`J95`	Great Shefford Obs. in England, 2 in MPECs 2010-S16 & 2010-S17 -- 2010 SP3, 2010 SE
`A17`	Guidestar Obs. in Germany, 2 in MPECs 2010-S16 & 2010-S17 -- 2010 SP3, 2010 SE
`379`	Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2010-S17 -- 2010 LY63, 2007 TY18, 1997 GL3
`G89`	Kachina Obs. in Arizona, 1 in MPEC 2010-S17 -- 2010 RA91
`704`	LINEAR in New Mexico, 7 in MPEC 2010-S17 -- 2010 SE, 2010 SD, 2010 SC, 2010 RB130, 1999 TB5, 199145, 5869
`844`	Los Molinos Obs. in Uruguay, 1 in MPEC 2010-S17 -- 2010 QE2
`130`	Lumezzane Obs. in Italy, 5 in MPEC 2010-S17 -- 2010 MF1, 2000 PQ27, 1997 GL3, 152952, 12538
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2010-S17, 2010-S18 & 2010-S19 -- 2010 SS3, 2010 SR3, 2010 RP80, 2010 RJ64, 2010 RD130, 65679
`F51`	Pan-STARRS 1 in Hawaii, 1 in MPEC 2010-S20 -- 2010 ST3
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2010-S17 -- 29075
`291`	Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2010-S17, 2010-S18, 2010-S19 & 2010-S20 -- 2010 ST3, 2010 SS3, 2010 SR3, 2010 SD, 2010 RJ64, 2010 RG42, 2010 RD31, 2010 RC130, 2010 RC, 2010 RA91, 2003 YG118
`I19`	Tanti Obs. in Argentina, 2 in MPEC 2010-S17 -- 2010 NR1, 2010 NG3
`H47`	Vicksburg Obs. in Mississippi, 1 in MPEC 2010-S17 -- 2212

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 18 September '10

**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 (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 SD	JPL Sentry	1528	R E M O V E D						JPL: Risk listing removed at 0952 UTC.
2010 SD	NEODyS	1528	R E M O V E D						-

2010 RD130	JPL Sentry	1528	R E M O V E D						JPL: Risk listing removed at 0951 UTC.
2010 RD130	NEODyS	1528	R E M O V E D						-

2010 RC130	JPL Sentry	1528	R E M O V E D						JPL: Risk listing removed at 0950 UTC.
2010 RC130	NEODyS	1528	R E M O V E D						-

2010 RA91	JPL Sentry	1528	2098	1	1.2e-09	-8.47	-8.47	0	JPL: "Analysis based on 42 observations spanning 4.1915 days (2010-Sep-13.19605 to 2010-Sep-17.38751)." Diameter approximately 0.070 km. from mean, weighted H=23.4.
2010 RA91	NEODyS	1528	R E M O V E D						-

2010 RM80	JPL Sentry	1528	2085-2110	21	1.8e-05	-6.64	-7.20	0	JPL: "Analysis based on 41 observations spanning 6.0418 days (2010-Sep-11.28495 to 2010-Sep-17.326714)." Diameter approximately 0.009 km. from mean, weighted H=28.0.
2010 RM80	NEODyS	1528	2085	1	4.5e-07	-8.13	-8.13	0	NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2010/09/11.286 to 2010/09/17.327."

2010 RK53	NEODyS	1528	R E M O V E D						-

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 18 September '10

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

2203	Grabbed MPEC 2010-S20 - 2010 ST3 - see above
2200	Grabbed MPEC 2010-S18 - 2010 SR3 - see above Grabbed MPEC 2010-S19 - 2010 SS3 - see above
1528	Noted that JPL Sentry has updated its 2010 RA91 risk assessment - see above Noted that NEODyS has removed 2010 RA91 as an impact risk - see above Noted that JPL Sentry has removed 2010 RC130 as an impact risk - see above Noted that NEODyS has removed 2010 RC130 as an impact risk - see above Noted that JPL Sentry has removed 2010 RD130 as an impact risk - see above Noted that NEODyS has removed 2010 RD130 as an impact risk - see above Noted that NEODyS has removed 2010 RK53 as an impact risk - see above Noted that JPL Sentry has updated its 2010 RM80 risk assessment - see above Noted that NEODyS has updated its 2010 RM80 risk assessment - see above Noted that JPL Sentry has removed 2010 SD as an impact risk - see above Noted that NEODyS has removed 2010 SD as an impact risk - see above Grabbed MPEC 2010-S17 - Daily Orbit Update - see above
0442	Grabbed MPEC 2010-S16 - 2010 SP3 - see above

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