2010-01-04 Tracking News

Contents on 4 January '10

IAU Minor Planet Center
- NEOCP Activity -- none
- New MPECs -- two MPECs
Observers -- thirteen observing facilities
Impact Risk Monitoring -- two objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Earth's Busy Neighborhood Traffic Report
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 January '10

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty and hasn't been noted by The Tracking News as being active yet today (checked at 2321 UTC). It was last noted active yesterday.

New MPECs on 4 January '10

Minor Planet Electronic Circulars

As of last check at 2321 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-A12 time-stamped "07:09 UT" - Daily Orbit Update - see below
MPEC 2010-A13 time-stamped "15:03 UT" - 2008 RJ1

MPEC 2010-A13 - "15:03 UT" - 2008 RJ1

K08R01J 2008 RJ1 (H=17.9 ~891m) from David Tholen's team on Mauna Kea (Dec. 6.42-43p3 at R=22.1-2 & 9.40-41p3 at R=22.4-9)

<< DOU on 4 Jan. '10 >> MPEC 2010-A12 - "07:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K09Y06S 2009 YS6 (i=148.2°, q=1.679 AU, Q=56.726 AU, arc=8 days, H=14.1 ~5.13 km) from the Spacewatch 0.9m telescope (Dec. 25.46-50p3)
K09X00O 2009 XO (arc=25 days, H=20.3 ~295m) from Desert Moon Obs. (Jan. 3.39-40p3)
Observations of recently (no longer) risk-listed objects
K09X08J 2009 XJ8 (arc=20 days, H=20.9 ~224m) from the Spacewatch 1.8m telescope (Jan. 4.22-23p3)
K09X08G 2009 XG8 (i=59.9°, arc=20 days, H=18.8 ~589m) from Spacewatch 1.8m (Jan. 4.10-11p3)
K09X02C 2009 XC2 (Q=4.187 AU, arc=23 days, H=17.0 ~1.35 km) from Desert Moon Obs. (Jan. 3.42-43p3)
Observations of small asteroids (H>22.0)
K09X01Q 2009 XQ1 (arc=25 days, H=22.3 ~117m) from Spacewatch 1.8m (Jan. 4.19-20p2)
K09W11C 2009 WC11 (arc=36 days, H=22.1 ~129m) from Spacewatch 0.9m (Dec. 26.13-17p2)
Observations of other objects
K09Y06T 2009 YT6 (arc=16 days, H=20.6 ~257m) from Spacewatch 1.8m (Jan. 4.15-16p3)
K09Y00O 2009 YO (arc=17 days, H=18.6 ~645m) from Spacewatch 1.8m (Jan. 4.24p2)
K09X01Z 2009 XZ1 (arc=24 days, H=21.6 ~162m) from Spacewatch 1.8m (Jan. 4.13-14p3)
K09WA4G 2009 WG104 (arc=41 days, H=20.1 ~323m) from Spacewatch 1.8m (Jan. 4.21-22p3)
K09WA4F 2009 WF104 (Q=5.098 AU, arc=41 days, H=16.9 ~1.41 km) from Desert Moon Obs. (Jan. 3.17-22p3)
K09W54G 2009 WG54 (arc=42 days, H=21.1 ~204m) from Spacewatch 1.8m (Jan. 4.17p2)
K09W06L 2009 WL6 (Q=4.263 AU, arc=47 days, H=20.2 ~309m) from Spacewatch 1.8m (Jan. 4.12p3 at V=21.8-22.4)
K09SA3O 2009 SO103 (arc=100 days, H=17.3 ~1.17 km) from Desert Moon Obs. (Jan. 3.11-14p3)
K09R00N 2009 RN (Q=4.583 AU, arc=106 days, H=20.0 ~339m) from Spacewatch 0.9m (Dec. 26.21-24p3)
K07M13K 2007 MK13 (arc=3 opp, H=20.1 ~323m) from Eschenberg Obs. (Jan. 3.70-71p7), Naef Obs. (Jan. 3.87-90p2), and Atlante Obs. (Jan. 4.04-06p3)
K06Y02Y 2006 YY2 (arc=2 opp, H=17.8 ~933m) from Desert Moon Obs. (Jan. 3.46-49p3)
K06K37Z 2006 KZ37 (arc=3 opp, H=19.1 ~513m) from Eschenberg Obs. (Jan. 3.75-76p3)
K05Y03U 2005 YU3 (Q=4.698 AU, arc=2 opp, H=19.8 ~371m) from Crni Vrh Obs. (Jan. 3.81-84p4) and Great Shefford Obs. (Jan. 3.92p3)
K05T51Y 2005 TY51 (Q=4.048 AU, arc=2 opp, H=17.7 ~977m) from Castelmartini Obs. (Jan. 2.79-80p5)
K05F04N 2005 FN4 (Q=4.698 AU, arc=3 opp, H=18.6 ~645m) from Spacewatch 1.8m (Jan. 4.07-08p3)
K02X14N 2002 XN14 (arc=2 opp, H=20.2 ~309m) from Eschenberg Obs. (Jan. 3.72p7)
K02W00P 2002 WP (arc=3 opp, H=18.5 ~676m) from Castelmartini Obs. (Jan. 2.86p4)
K02T67S 2002 TS67 (arc=4 opp, H=18.9 ~562m) from Spacewatch 1.8m (Jan. 4.08-09p2)
K02N16W 2002 NW16 (arc=2 opp, H=18.1 ~812m) from Castelmartini Obs. (Jan. 2.84p5)
K01QE2H 2001 QH142 (arc=5 opp, H=18.3 ~741m) from Naef Obs. (Jan. 3.88-90p2)
K01B61P 2001 BP61 (arc=3 opp, H=20.3 ~295m) from Eschenberg Obs. (Jan. 3.73-74p3)
K00O08G 2000 OG8 (Q=4.115 AU, arc=3 opp, H=17.7 ~977m) from Spacewatch 0.9m (Dec. 25.47-50p3)
M2008 222008 1998 QQ63 from Spacewatch 0.9m (Dec. 25.47-48p2)
J0166 190166 2005 UP156 from Spacewatch 0.9m (Dec. 27.40-43p2)
F2560 152560 1991 BN from Spacewatch 0.9m (Dec. 26.32-36p3)
D8937 138937 2001 BK16 from Castelmartini Obs. (Jan. 2.87p5)
D7062 137062 1998 WM from Desert Moon Obs. (Jan. 3.52p3)
D6618 136618 1994 CN2 from Spacewatch 0.9m (Dec. 27.49p1)
96590 96590 1998 XB from Castelmartini Obs. (Jan. 2.77-78p3)
85818 85818 1998 XM4 from Los Molinos Obs. (Jan. 3.09-12p4)
39572 39572 1993 DQ1 from Spacewatch 0.9m (Dec. 26.44-47p3)
35396 35396 1997 XF11 from Castelmartini Obs. (Jan. 2.87-88p3)
25143 25143 Itokawa (1998 SF36) from Herrenberg Obs. (Jan. 2.83-86p3)
08567 8567 1996 HW1 from Spacewatch 0.9m (Dec. 27.46-49p3)
05626 5626 1991 FE from Castelmartini Obs. (Jan. 2.77p4)
04015 4015 Wilson-Harrington (1979 VA) from Castelmartini Obs. (Jan. 2.78-79p3) and La Vara Obs. (Jan. 3.88p3)
03552 3552 Don Quixote (1983 SA) from Castelmartini Obs. (Jan. 2.76p4)
00433 433 Eros (1898 DQ) from Castelmartini Obs. (Jan. 2.76p5)

Observers on 4 January '10

Thirteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`J51`	Atlante Obs. in the Canary Islands, 1 in MPEC 2010-A12 -- 2007 MK13
`160`	Castelmartini Obs. in Italy, 10 in MPEC 2010-A12 -- 2005 TY51, 2002 WP, 2002 NW16, 96590, 35396, 138937, 5626, 4015, 3552, 433
`106`	Crni Vrh Obs. in Slovenia, 1 in MPEC 2010-A12 -- 2005 YU3
`448`	Desert Moon Obs. in New Mexico, 6 in MPEC 2010-A12 -- 2009 XO, 2009 XC2, 2009 WF104, 2009 SO103, 2006 YY2, 137062
`151`	Eschenberg Obs. in Switzerland, 4 in MPEC 2010-A12 -- 2007 MK13, 2006 KZ37, 2002 XN14, 2001 BP61
`J95`	Great Shefford Obs. in England, 1 in MPEC 2010-A12 -- 2005 YU3
`240`	Herrenberg Obs. in Germany, 1 in MPEC 2010-A12 -- 25143
`J38`	La Vara Obs. in Spain, 1 in MPEC 2010-A12 -- 4015
`844`	Los Molinos Obs. in Uruguay, 1 in MPEC 2010-A12 -- 85818
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-A13 -- 2008 RJ1
`A13`	Naef Obs. in Switzerland, 2 in MPEC 2010-A12 -- 2007 MK13, 2001 QH142
`691`	Spacewatch 0.9m telescope in Arizona, 10 in MPEC 2010-A12 -- 2009 YS6, 2009 WC11, 2009 RN, 2000 OG8, 39572, 222008, 190166, 152560, 136618, 8567
`291`	Spacewatch 1.8m telescope in Arizona, 11 in MPEC 2010-A12 -- 2009 YT6, 2009 YO, 2009 XZ1, 2009 XQ1, 2009 XJ8, 2009 XG8, 2009 WL6, 2009 WG54, 2009 WG104, 2005 FN4, 2002 TS67

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

Impact Risk Monitoring on 4 January '10

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2321 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. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few 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

2009 YS6	JPL Sentry	1544	2033	1	1.5e-10	-3.45	-3.45	0	JPL: "Analysis based on 37 observations spanning 8.1029 days (2009-Dec-17.39267 to 2009-Dec-25.49561)." Diameter approximately 4.400 km. from mean, weighted H=14.4.
2009 YS6	NEODyS	1544	2018-2090	21	1.49e-09	-2.48	-2.90	0	NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2009/12/17.393 to 2009/12/25.496."

2009 XO	JPL Sentry	1544	2038	1	1.8e-07	-4.22	-4.22	0	JPL: "Analysis based on 131 observations spanning 25.250 days (2009-Dec-09.152 to 2010-Jan-03.40215)." Diameter approximately 0.300 km. from mean, weighted H=20.3.
2009 XO	NEODyS	1544	2038-2083	3	2.25e-07	-4.18	-4.22	0	NEODyS: "Based on 131 optical observations (of which 0 are rejected as outliers) from 2009/12/09.153 to 2010/01/03.403."

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 January '10

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

1544

Noted that JPL Sentry has updated its 2009 XO risk assessment - see above
Noted that NEODyS has updated its 2009 XO risk assessment - see above
Noted that JPL Sentry has posted 2009 YS6 as an impact risk - see above
Noted that NEODyS has posted 2009 YS6 as an impact risk - see above
Grabbed MPEC 2010-A12 - Daily Orbit Update - see above
Grabbed MPEC 2010-A13 - 2008 RJ1 - see above

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