2010-01-05 Tracking News

Contents on 5 January '10

IAU Minor Planet Center
- NEOCP Activity -- two listings: 1 new, 1 updated
- New MPECs -- two MPECs
Observers -- thirteen observing facilities
Impact Risk Monitoring -- three 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 5 January '10

The MPC's NEO Confirmation Page has 2 listings: 1 new, 1 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and one updated listing. Both of these were "one nighters."

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 5 January '10

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-A14 time-stamped "07:09 UT" - Daily Orbit Update - see below
MPEC 2010-A15 time-stamped "17:46 UT" - 2007 FL1

MPEC 2010-A15 - "17:46 UT" - 2007 FL1

K07F01L 2007 FL1 (H=18.5 ~676m) from David Tholen's team on Mauna Kea (2008 Nov. 20.42-44p3 at R=23.4-7, Nov. 11.51p1 at R=23.7 & Dec. 9.45p2 at R=23.4-9)

<< DOU on 5 Jan. '10 >> MPEC 2010-A14 - "07:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K09Y06S 2009 YS6 (i=148.4°, q=1.693 AU, Q=80.752 AU, arc=18 days, H=14.1 ~5.13 km) from UKAPP via Faulkes Telescope North (Jan. 4.50-54p6)
K09Y00G 2009 YG (arc=18 days, H=18.5 ~676m) from Astronomical Research Obs. Westfield (ARO Westfield) (Jan. 4.44-45p4)
K09X00O 2009 XO (arc=26 days, H=20.3 ~295m) from ARO Westfield (Jan. 4.34-36p6)
Observations of recently (no longer) risk-listed objects
K09Y06V 2009 YV6 (arc=16 days, H=20.8 ~234m) from the Spacewatch 1.8m telescope (Jan. 4.25-26p3 & 5.17-18p3)
K09X02F 2009 XF2 (arc=23 days, H=20.1 ~323m) from ARO Westfield (Jan. 4.14p3)
K09X02C 2009 XC2 (Q=4.185 AU, arc=24 days, H=17.0 ~1.35 km) from ARO Westfield (Jan. 4.42-43p3)
Observations of small asteroids (H>22.0)
K09X07P 2009 XP7 (arc=21 days, H=24.0 ~54m) from Spacewatch 1.8m (Jan. 4.29p3 & 5.21-22p2)
K09X02O 2009 XO2 (arc=23 days, H=23.5 ~68m) from ARO Westfield (Jan. 4.45-47p3)
K09W25T 2009 WT25 (arc=44 days, H=23.1 ~81m) from Spacewatch 1.8m (Jan. 4.27-28p2)
K09U02D 2009 UD2 (arc=79 days, H=22.2 ~123m) from Spacewatch 1.8m (Jan. 5.10-11p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K09U87S 2009 US87 (arc=74 days, H=22.0 ~135m) from Spacewatch 1.8m (Jan. 4.32-33p3 at V=21.3-22.3 & 5.19-20p3 at V=21.1-4)
Observations of other objects
K09X02R 2009 XR2 (arc=22 days, H=19.1 ~513m) from ARO Westfield (Jan. 4.28-29p4) and Desert Moon Obs. (Jan. 4.30-31p4)
K09WD9M 2009 WM139 (arc=174 days, H=18.6 ~645m) from ARO Westfield (Jan. 4.13-14p2)
K09WA6D 2009 WD106 (arc=3 opp, H=18.6 ~645m) from ARO Westfield (Jan. 4.15-16p3)
K09WA4Z 2009 WZ104 (arc=41 days, H=20.5 ~269m) from ARO Westfield (Jan. 3.07p3) and Buchloe Obs. (Jan. 4.79p3)
K09W06L 2009 WL6 (Q=4.264 AU, arc=47 days, H=20.2 ~309m) from ARO Westfield (Jan. 4.00-02p3 at V=22.1-2)
K09W06K 2009 WK6 (arc=48 days, H=19.2 ~490m) from Spacewatch 1.8m (Jan. 4.33-34p3)
K09W00F 2009 WF (arc=49 days, H=19.9 ~355m) from ARO Westfield (Jan. 4.17-18p3) and Desert Moon Obs. (Jan. 4.24-28p3)
K09V24O 2009 VO24 (arc=54 days, H=19.7 ~389m) from ARO Westfield (Jan. 4.01p3) and Desert Moon Obs. (Jan. 4.07-11p2)
K09U03N 2009 UN3 (i=37.4°, arc=76 days, H=17.7 ~977m) from the Siding Spring Survey (SSS) (Jan. 3.51p1)
K09U00K 2009 UK (arc=81 days, H=20.1 ~323m) from ARO Westfield (Jan. 4.02-04p3) and Spacewatch 1.8m (Jan. 5.16p3)
K09SM9C 2009 SC229 (arc=96 days, H=19.1 ~513m) from ARO Westfield (Jan. 3.06-09p3 at V=22.2-5)
K09SA3O 2009 SO103 (arc=100 days, H=17.3 ~1.17 km) from ARO Westfield (Jan. 3.03-04p4)
K09S98N 2009 SN98 (arc=2 opp, H=19.2 ~490m) from Spacewatch 1.8m (Jan. 5.14-15p2)
K09N00H 2009 NH (arc=177 days, H=18.8 ~589m) from ARO Westfield (Jan. 4.15-17p3)
K09M01L 2009 ML1 (arc=195 days, H=19.5 ~426m) from ARO Westfield (Jan. 4.04-06p3 at V=22.3-6)
K09K02L 2009 KL2 (arc=2 opp, H=18.0 ~851m) from Sierra Stars Obs. (Jan. 4.14-16p2)
K08Y32Z 2008 YZ32 (arc=2 opp, H=20.2 ~309m) from ARO Westfield (Jan. 4.12-13p5)
K07U03R 2007 UR3 (arc=3 opp, H=21.2 ~195m) from ARO Westfield (Jan. 4.30-32p3)
K07M13K 2007 MK13 (arc=3 opp, H=20.1 ~323m) from Pear Tree Obs. (Jan. 4.15-18p3) and Mt. Tuffley Obs. (Jan. 4.84p3)
K05Y03U 2005 YU3 (Q=4.698 AU, arc=2 opp, H=19.7 ~389m) from Crni Vrh Obs. (Jan. 3.92p2) and LINEAR (Jan. 4.14-19p5)
K05M00C 2005 MC (Q=4.167 AU, arc=3 opp, H=16.5 ~1.70 km) from Mt. Tuffley Obs. (Jan. 4.89-90p3)
K04X35M 2004 XM35 (arc=2 opp, H=19.8 ~371m) from ARO Westfield (Jan. 4.17-18p3)
K02X14N 2002 XN14 (arc=2 opp, H=20.2 ~309m) from LINEAR (Jan. 4.21-26p5)
K02W00P 2002 WP (arc=3 opp, H=18.5 ~676m) from ARO Westfield (Jan. 4.09-12p4)
K02N16W 2002 NW16 (arc=2 opp, H=18.1 ~812m) from LINEAR (Jan. 4.14-19p5)
K01B61P 2001 BP61 (arc=3 opp, H=20.3 ~295m) from LINEAR (Jan. 4.14-20p5)
J93R00A 1993 RA (arc=3 opp, H=19.1 ~513m) from ARO Westfield (Jan. 3.08-09p3)
F9402 159402 1999 AP10 from Mt. Tuffley Obs. (Jan. 4.82-83p3)
25143 25143 Itokawa (1998 SF36) from LightBuckets Obs. Mayhill (Jan. 3.10-16p3, 4.22p1 & 4.28p1)
05646 5646 1990 TR from LINEAR (Jan. 4.27-32p5)
02212 2212 Hephaistos (1978 SB) from LINEAR (Jan. 4.21-26p5)
00433 433 Eros (1898 DQ) from Mt. Tuffley Obs. (Jan. 4.80p3)

Observers on 5 January '10

Thirteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 22 in MPEC 2010-A14 -- 2009 YG, 2009 XR2, 2009 XO2, 2009 XO, 2009 XF2, 2009 XC2, 2009 WZ104, 2009 WM139, 2009 WL6, 2009 WF, 2009 WD106, 2009 VO24, 2009 UK, 2009 SO103, 2009 SC229, 2009 NH, 2009 ML1, 2008 YZ32, 2007 UR3, 2004 XM35, 2002 WP, 1993 RA
`215`	Buchloe Obs. in Germany, 1 in MPEC 2010-A14 -- 2009 WZ104
`106`	Crni Vrh Obs. in Slovenia, 1 in MPEC 2010-A14 -- 2005 YU3
`448`	Desert Moon Obs. in New Mexico, 3 in MPEC 2010-A14 -- 2009 XR2, 2009 WF, 2009 VO24
`F651`	UKAPP in Northern Ireland via Faulkes Telescope North in Hawaii, 1 in MPEC 2010-A14 -- 2009 YS6
`704`	LINEAR in New Mexico, 6 in MPEC 2010-A14 -- 2005 YU3, 2002 XN14, 2002 NW16, 2001 BP61, 5646, 2212
`H12`	LightBuckets Obs. Mayhill in New Mexico, 1 in MPEC 2010-A14 -- 25143
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-A15 -- 2007 FL1
`J93`	Mt. Tuffley Obs. in England, 4 in MPEC 2010-A14 -- 2007 MK13, 2005 MC, 159402, 433
`H23`	Pear Tree Obs. in Florida, 1 in MPEC 2010-A14 -- 2007 MK13
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2010-A14 -- 2009 UN3
`G68`	Sierra Stars Obs. in northern California, 1 in MPEC 2010-A14 -- 2009 KL2
`291`	Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2010-A14 -- 2009 YV6, 2009 XP7, 2009 WT25, 2009 WK6, 2009 US87, 2009 UK, 2009 UD2, 2009 SN98

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

Impact Risk Monitoring on 5 January '10

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2358 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	R E M O V E D						JPL: Risk listing removed at 0938 UTC.
2009 YS6	NEODyS	1544	R E M O V E D						-

2009 YG	JPL Sentry	1544	R E M O V E D						JPL: Risk listing removed at 0951 UTC.
2009 YG	NEODyS	1544	R E M O V E D						-

2009 XO	JPL Sentry	1544	2038	1	1.2e-07	-4.38	-4.38	0	JPL: "Analysis based on 137 observations spanning 26.210 days (2009-Dec-09.152 to 2010-Jan-04.362462)." Diameter approximately 0.300 km. from mean, weighted H=20.3.
2009 XO	NEODyS	1544	2038-2073	2	1.25e-07	-4.38	-4.38	0	NEODyS: "Based on 137 optical observations (of which 0 are rejected as outliers) from 2009/12/09.153 to 2010/01/04.363."

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 5 January '10

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

1805

Grabbed MPEC 2010-A15 - 2007 FL1 - see above

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 removed 2009 YG as an impact risk - see above
Noted that NEODyS has removed 2009 YG as an impact risk - see above
Noted that JPL Sentry has removed 2009 YS6 as an impact risk - see above
Noted that NEODyS has removed 2009 YS6 as an impact risk - see above
Grabbed MPEC 2010-A14 - Daily Orbit Update - see above
Noted that the NEOCP has become active

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