2010-09-04 Tracking News

Contents on 4 September '10

IAU Minor Planet Center
- NEOCP Activity -- 19 listings: 6 new, 13 updated
- New MPECs -- eleven MPECs
Observers -- 21 observing facilities
Impact Risk Monitoring -- four objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Of 325 risk-listed objects, 16 have had news in the last 30 days. Updated at 2004 UTC.
Earth's Busy Neighborhood Traffic Report
Two objects are known to be within ten LD of Earth today. Updated at 2031 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 4 September '10

The MPC's NEO Confirmation Page has 19 listings: 6 new, 13 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six new and thirteen updated listings. Of these, thirteen were "one nighters." So far The Tracking News has counted a total of 32 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 4 September '10

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 2010-R24 time-stamped "06:08 UT" - Daily Orbit Update - see below
MPEC 2010-R25 time-stamped "16:50 UT" - 2010 RT11 - see below
MPEC 2010-R26 time-stamped "17:30 UT" - 2010 RV11 - see below
MPEC 2010-R27 time-stamped "17:37 UT" - 2010 RW11 - see below
MPEC 2010-R28 time-stamped "17:44 UT" - 2010 RY11 - see below
MPEC 2010-R29 time-stamped "17:48 UT" - 2010 RZ11 - see below
MPEC 2010-R30 time-stamped "17:51 UT" - 2010 RA12 - see below
MPEC 2010-R31 time-stamped "18:07 UT" - 2010 RB12 - see below
MPEC 2010-R32 time-stamped "18:46 UT" - 2008 EE68 = 2010 RX11 - see below
MPEC 2010-R33 time-stamped "18:58 UT" - 2001 PH9 - see below
MPEC 2010-R34 time-stamped "19:33 UT" - 2008 EE68

MPEC 2010-R34 - "19:33 UT" - 2008 EE68

K08E68E 2008 EE68 (H=20.5 ~269m) from the Mt. Lemmon Survey (MLS) (Sept. 3.26-27p3, 3.39p4 & 4.26-28p8), the Spacewatch 1.8m telescope (Sept. 3.38-39p3), and Magdalena Ridge Obs. (MRO) (Sept. 4.37-39p4)

MPEC 2010-R33 - "18:58 UT" - 2001 PH9

K01P09H 2001 PH9 (Q=4.194 AU, H=21.1 ~204m) from La Sagra Obs. (Sept. 4.01-04p3), Astronomical Research Obs. Westfield (Sept. 4.37-38p3), and Bisei Spaceguard Center (Sept. 4.51-55p8)

MPEC 2010-R32 - "18:46 UT" - 2008 EE68 = 2010 RX11

K08E68E 2008 EE68 (H=20.5 ~269m)

MPEC 2010-R31 - "18:07 UT" - 2010 RB12

K10R12B 2010 RB12 (small asteroid, Earth MOID=0.8 LD, H=26.9 ~14m) was discovered at 0715 UT on 2 Sept. by LINEAR, which observed it at Sept. 2.30-34p4 and 3.30-34p9. The discovery was confirmed by Farpoint Obs. (Sept. 4.32p3), Sabino Canyon Obs. (Sept. 4.43p3), and Moriyama Obs. (Sept. 4.61-62p5 & 4.70-71p5). This object is now within ten lunar distances (LD) of Earth, reaching 2.5 LD on 5 Sept.

MPEC 2010-R30 - "17:51 UT" - 2010 RA12

K10R12A 2010 RA12 (small asteroid, H=26.9 ~14m) was discovered at 1031 UT on 3 Sept. by MLS, which observed it at Sept. 3.44-48p7, 4.29-30p3, and 4.38p5. The discovery was confirmed by MRO (Sept. 4.45-47p4).

MPEC 2010-R29 - "17:48 UT" - 2010 RZ11

K10R11Z 2010 RZ11 (risk-listed, Earth MOID=2.3 LD, H=26.6 ~16m) was discovered at 0835 UT on 3 Sept. by MLS, which observed it at Sept. 3.36-38p4, 3.42-43p4, and 4.35-37p4. The discovery was confirmed by Spacewatch 1.8m (Sept. 4.43-44p3).

MPEC 2010-R28 - "17:44 UT" - 2010 RY11

K10R11Y 2010 RY11 (small asteroid, Earth MOID=8.9 LD, H=26.0 ~21m) was discovered at 0749 UT on 3 Sept. by MLS, which observed it at Sept. 3.33-39p8 and 4.25-26p9. The discovery was confirmed by Spacewatch 1.8m (Sept. 4.35-36p3) and MRO (Sept. 4.41-43p4).

MPEC 2010-R27 - "17:37 UT" - 2010 RW11

K10R11W 2010 RW11 (small asteroid, i=37.6°, H=24.6 ~41m) was discovered at 0531 UT on 3 Sept. by MLS, which observed it at Sept. 3.23-35p15 and 4.24p5. The discovery was confirmed by MRO (Sept. 4.30-33p4).

MPEC 2010-R26 - "17:30 UT" - 2010 RV11

K10R11V 2010 RV11 (small asteroid, H=26.9 ~14m) was discovered at 0525 UT on 3 Sept. by MLS, which observed it at Sept. 3.23-28p8 at V=20.4-22.2, 3.35p4 at V=20.7-21.6, and 4.25p5 at V=20.3-9. The discovery was confirmed by Spacewatch 1.8m (Sept. 3.37-38p3 & 4.29-30p3) and MRO (Sept. 4.33-35p4).

MPEC 2010-R25 - "16:50 UT" - 2010 RT11

K10R11T 2010 RT11 (H=18.7 ~616m) was discovered at 0525 UT on 2 Sept. by MLS, which observed it at Sept. 2.23-25p4 and 2.32-34p4. The discovery was confirmed by ISON-NM Obs. (Sept. 2.33-38p3), Great Shefford Obs. (Sept. 2.92-94p3), Spacewatch 1.8m (Sept. 3.23p3), Farpoint Obs. (Sept. 3.29-30p2 & 4.30-31p2), Kanab Obs. (Sept. 3.32p1 & 3.36p1), Libbiano Obs. (Sept. 3.97-99p3), and Remanzacco Obs. (Sept. 3.99p2).

<< DOU on 4 Sept. '10 >> MPEC 2010-R24 - "06:08 UT" - Daily Orbit Update

Observations of risk-listed objects
K10Q02G 2010 QG2 (small asteroid, arc=3 days, H=24.2 ~49m) from Great Shefford Obs. (Sept. 3.04-07p6) and Spacewatch 1.8m (Sept. 3.42-43p2)
Observations of small asteroids (H>22.0)
K10R04J 2010 RJ4 (arc=1 day, H=24.0 ~54m) from LINEAR (Sept. 3.30-35p5)
K10R03S 2010 RS3 (arc=1 day, H=22.6 ~102m) from LINEAR (Sept. 3.19-23p4)
K10R00C 2010 RC (arc=1 day, H=26.4 ~18m) from LINEAR (Sept. 2.30-35p4)
K10R00A 2010 RA (arc=2 days, H=22.9 ~89m) from ESA Optical Ground Station (ESA OGS) (Sept. 2.00-01p3) and LINEAR (Sept. 3.30-34p5)
K10P66U 2010 PU66 (arc=30 days, H=22.1 ~129m) from ESA OGS (Sept. 2.21-22p2)
K10P66S 2010 PS66 (arc=19 days, H=25.1 ~32m) from Spacewatch 1.8m (Sept. 3.26-27p3)
K10CE1N 2010 CN141 (arc=50 days, H=22.4 ~112m) from David Tholen's team on Mauna Kea (April 5.46p1 at V=24.3)
Observations of other objects
K10Q02D 2010 QD2 (arc=12 days, H=17.6 ~1.02 km) from ESA OGS (Sept. 1.16p3)
K10P58W 2010 PW58 (arc=28 days, H=21.3 ~186m) from Spacewatch 1.8m (Sept. 3.12-13p3)
K10P02P 2010 PP2 (arc=31 days, H=21.1 ~204m) from LINEAR (Sept. 3.30-35p5)
K10NB7W 2010 NW117 (arc=57 days, H=18.1 ~812m) from LINEAR (Sept. 3.18-23p4)
K10M01F 2010 MF1 (arc=77 days, H=19.7 ~389m) from Castelmartini Obs. (Aug. 29.84-85p3, 30.89p3 & Sept. 3.81p3) and Hamamatsu-Yuto Obs. (Sept. 3.57-59p3)
K10L63Y 2010 LY63 (arc=4 opp, H=17.8 ~933m) from AAAA Buenos Aires Obs. (Aug. 28.08-20p5)
K10KC7K 2010 KK127 (arc=105 days, H=20.7 ~245m) from Spacewatch 1.8m (Sept. 3.48-49p3)
K10KB7Z 2010 KZ117 (arc=104 days, H=19.1 ~513m) from Castelmartini Obs. (Aug. 29.90-91p3)
K10F92O 2010 FO92 (arc=167 days, H=20.0 ~339m) from Castelmartini Obs. (Aug. 30.92p1) and LINEAR (Sept. 3.12-17p5)
K07VI9G 2007 VG189 (arc=2 opp, H=19.4 ~446m) from Castelmartini Obs. (Aug. 29.82p2, 30.84p3 & Sept. 3.82p2)
K05X08J 2005 XJ8 (arc=3 opp, H=17.0 ~1.35 km) from Spacewatch 1.8m (Sept. 3.44-45p3)
K05G59E 2005 GE59 (arc=4 opp, H=18.0 ~851m) from Castelmartini Obs. (Sept. 2.07-08p3)
K03F05C 2003 FC5 (arc=5 opp, H=18.2 ~776m) from MLS (Sept. 3.23-25p4)
K02N71E 2002 NE71 (arc=2 opp, H=19.3 ~467m) from Castelmartini Obs. (Aug. 29.85-86p3, 30.89-90p3 & Sept. 3.80p3) and Hamamatsu-Yuto Obs. (Sept. 3.60-66p9)
K02G08Z 2002 GZ8 (Q=4.637 AU, arc=2 opp, H=18.2 ~776m) from Spacewatch 1.8m (Sept. 3.33-34p2)
K00P27Q 2000 PQ27 (arc=2 opp, H=19.8 ~371m) from LINEAR (Sept. 3.36-41p5)
J97G03L 1997 GL3 (Q=4.057 AU, arc=2 opp, H=19.3 ~467m) from LINEAR (Sept. 3.36-40p5)
O3147 243147 2007 TX18 from Castelmartini Obs. (Sept. 2.08-09p3)
O3025 243025 2006 UM216 from Castelmartini Obs. (Aug. 30.83p1 & Sept. 3.82p3)
O2211 242211 2003 QB90 from Castelmartini Obs. (Sept. 2.09p3)
N7442 237442 1999 TA10 from Castelmartini Obs. (Aug. 30.86-87p3)
G1998 161998 1988 PA from LINEAR (Sept. 3.12-17p5)
F4029 154029 2002 CY46 from Hamamatsu-Yuto Obs. (Sept. 1.73-75p6) and Castelmartini Obs. (Sept. 2.10p3)
F3951 153951 2002 AC3 from ARO Westfield (Sept. 1.19-22p3 at V=21.8-22.4)
F2558 152558 1990 SA from Castelmartini Obs. (Aug. 29.99p3 & Sept. 1.00p3)
E3381 143381 2003 BC21 from Castelmartini Obs. (Aug. 29.96p3 & Sept. 1.97p3), LINEAR (Sept. 3.31-35p5), MLS (Sept. 3.33-35p4), and Atlante Obs. (Sept. 4.00-02p3)
D8847 138847 2000 VE62 from Castelmartini Obs. (Sept. 2.01p3)
A0756 100756 1998 FM5 from MLS (Sept. 3.23-25p4)
66008 66008 1998 QH2 from Castelmartini Obs. (Sept. 2.04-05p3)
31221 31221 1998 BP26 from LINEAR (Sept. 3.37-40p4)
23187 23187 2000 PN9 from Castelmartini Obs. (Aug. 29.94p3)
19764 19764 2000 NF5 from Castelmartini Obs. (Sept. 2.05p3), LINEAR (Sept. 3.36-40p5), and Atlante Obs. (Sept. 4.03-04p3)
17182 17182 1999 VU from LINEAR (Sept. 3.30-34p5)
09202 9202 1993 PB from LINEAR (Sept. 3.24-29p5)
07977 7977 1977 QQ5 from LINEAR (Sept. 3.12-17p4)
07336 7336 Saunders (1989 RS1) from Castelmartini Obs. (Aug. 29.95p3) and LINEAR (Sept. 3.30-35p5)
06239 6239 Minos (1989 QF) from Castelmartini Obs. (Sept. 2.02p3) and LINEAR (Sept. 3.30-34p5)
05786 5786 Talos (1991 RC) from Castelmartini Obs. (Aug. 29.93p3) and LINEAR (Sept. 3.24-29p5)
05143 5143 Heracles (1991 VL) from Castelmartini Obs. (Aug. 29.99-00p3 & Sept. 2.02p3)
04486 4486 Mithra (1987 SB) from Castelmartini Obs. (Sept. 2.09-10p3)
04257 4257 Ubasti (1987 QA) from Castelmartini Obs. (Aug. 29.91p3)
04055 4055 Magellan (1985 DO2) from Castelmartini Obs. (Aug. 30.85p3)
03752 3752 Camillo (1985 PA) from Castelmartini Obs. (Aug. 30.93p3)
02212 2212 Hephaistos (1978 SB) from Hamamatsu-Yuto Obs. (Sept. 3.72-73p4)

Observers on 4 September '10

A total of 21 observing facilities appear in today's MPECs.

Code	Observer / observatory
`834`	AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2010-R24 -- 2010 LY63
`H21`	Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2010-R24 & 2010-R33 -- 2001 PH9, 153951
`J51`	Atlante Obs. in the Canary Islands, 2 in MPEC 2010-R24 -- 19764, 143381
`300`	Bisei Spaceguard Center in Japan, 1 in MPEC 2010-R33 -- 2001 PH9
`160`	Castelmartini Obs. in Italy, 25 in MPEC 2010-R24 -- 2010 MF1, 2010 KZ117, 2010 FO92, 2007 VG189, 2005 GE59, 2002 NE71, 66008, 243147, 243025, 242211, 237442, 23187, 19764, 154029, 152558, 143381, 138847, 7336, 6239, 5786, 5143, 4486, 4257, 4055, 3752
`J04`	ESA Optical Ground Station (ESA OGS) in the Canary Islands, 3 in MPEC 2010-R24 -- 2010 RA, 2010 QD2, 2010 PU66
`734`	Farpoint Obs. in Kansas, 2 in MPECs 2010-R25 & 2010-R31 -- 2010 RT11, 2010 RB12
`J95`	Great Shefford Obs. in England, 2 in MPECs 2010-R24 & 2010-R25 -- 2010 RT11, 2010 QG2
`379`	Hamamatsu-Yuto Obs. in Japan, 4 in MPEC 2010-R24 -- 2010 MF1, 2002 NE71, 154029, 2212
`H15`	ISON-NM Obs. in New Mexico, 1 in MPEC 2010-R25 -- 2010 RT11
`682`	Kanab Obs. in Utah, 1 in MPEC 2010-R25 -- 2010 RT11
`704`	LINEAR in New Mexico, 20 in MPECs 2010-R24 & 2010-R31 -- 2010 RS3, 2010 RJ4, 2010 RC, 2010 RB12, 2010 RA, 2010 PP2, 2010 NW117, 2010 FO92, 2000 PQ27, 1997 GL3, 31221, 19764, 17182, 161998, 143381, 9202, 7977, 7336, 6239, 5786
`J75`	La Sagra Obs. in Spain, 1 in MPEC 2010-R33 -- 2001 PH9
`B33`	Libbiano Obs. in Italy, 1 in MPEC 2010-R25 -- 2010 RT11
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2010-R26, 2010-R27, 2010-R28, 2010-R30 & 2010-R34 -- 2010 RY11, 2010 RW11, 2010 RV11, 2010 RA12, 2008 EE68
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-R24 -- 2010 CN141
`900`	Moriyama Obs. in Japan, 1 in MPEC 2010-R31 -- 2010 RB12
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2010-R24, 2010-R25, 2010-R26, 2010-R27, 2010-R28, 2010-R29, 2010-R30 & 2010-R34 -- 2010 RZ11, 2010 RY11, 2010 RW11, 2010 RV11, 2010 RT11, 2010 RA12, 2008 EE68, 2003 FC5, 143381, 100756
`473`	Remanzacco Obs. in Italy, 1 in MPEC 2010-R25 -- 2010 RT11
`854`	Sabino Canyon Obs. in Arizona, 1 in MPEC 2010-R31 -- 2010 RB12
`291`	Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2010-R24, 2010-R25, 2010-R26, 2010-R28, 2010-R29 & 2010-R34 -- 2010 RZ11, 2010 RY11, 2010 RV11, 2010 RT11, 2010 QG2, 2010 PW58, 2010 PS66, 2010 KK127, 2008 EE68, 2005 XJ8, 2002 GZ8

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

Impact Risk Monitoring on 4 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 RZ11	JPL Sentry	2002	2062	1	9.2e-09	-8.66	-8.66	0	JPL: "Analysis based on 15 observations spanning 1.0807 days (2010-Sep-03.35811 to 2010-Sep-04.43884)." Diameter approximately 0.016 km. from mean, weighted H=26.6.

2010 RY3	NEODyS	1522	2078	1	7.51e-10	-9.19	-9.19	0	NEODyS: "Based on 15 optical observations (of which 1 are rejected as outliers) from 2010/09/02.452 to 2010/09/03.433."

2010 RW3	NEODyS	1522	2034-2066	3	1.3e-10	-9.51	-9.75	0	NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2010/09/02.383 to 2010/09/03.314."

2010 QG2	JPL Sentry	1522	2051-2070	7	2.6e-06	-5.11	-5.17	0	JPL: "Analysis based on 27 observations spanning 3.0580 days (2010-Aug-31.37082 to 2010-Sep-03.42881)." Diameter approximately 0.049 km. from mean, weighted H=24.2.
2010 QG2	NEODyS	1522	2051-2070	8	2.98e-06	-5.05	-5.10	0	NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2010/08/31.372 to 2010/09/03.430."

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 4 September '10

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

2002	Noted that JPL Sentry has posted 2010 RZ11 as an impact risk - see above Grabbed MPEC 2010-R34 - 2008 EE68 - see above
1902	Grabbed MPEC 2010-R29 - 2010 RZ11 - see above Grabbed MPEC 2010-R30 - 2010 RA12 - see above Grabbed MPEC 2010-R31 - 2010 RB12 - see above Grabbed MPEC 2010-R32 - 2008 EE68 = 2010 RX11 - see above Grabbed MPEC 2010-R33 - 2001 PH9 - see above
1746	Grabbed MPEC 2010-R26 - 2010 RV11 - see above Grabbed MPEC 2010-R27 - 2010 RW11 - see above Grabbed MPEC 2010-R28 - 2010 RY11 - see above
1717	Grabbed MPEC 2010-R25 - 2010 RT11 - see above
1522	Noted that JPL Sentry has updated its 2010 QG2 risk assessment - see above Noted that NEODyS has updated its 2010 QG2 risk assessment - see above Noted that NEODyS has posted 2010 RW3 as an impact risk - see above Noted that NEODyS has posted 2010 RY3 as an impact risk - see above Grabbed MPEC 2010-R24 - Daily Orbit Update - see above

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