2009-12-10 Tracking News

Contents on 10 December '09

IAU Minor Planet Center
- NEOCP Activity -- seven listings: 4 new, 3 updated
- New MPECs -- three MPECs
Observers -- 28 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 10 December '09

The MPC's NEO Confirmation Page has 7 listings: 4 new, 3 updated

When last checked at 2313 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and three updated listings. Of these, four were "one nighters."

New MPECs on 10 December '09

Minor Planet Electronic Circulars

There were three MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-X31 time-stamped "00:01 UT" - 2009 XO - see below
MPEC 2009-X32 time-stamped "07:08 UT" - Daily Orbit Update - see below
MPEC 2009-X33 time-stamped "23:26 UT" - 2009 XV

MPEC 2009-X33 - "23:26 UT" - 2009 XV

K09X00V 2009 XV (Q=4.266 AU, Earth MOID=8.3 LD, H=21.1 ~204m) was discovered at 0928 UT on 9 Dec. by LINEAR, which observed it at Dec. 9.39-43p4. The discovery was confirmed by Paus Obs. (Dec. 9.93p3), New Millennium Obs. (Dec. 9.97-98p5), Monte Baldo Obs. (Dec. 9.97p5), Remanzacco Obs. (Dec. 9.98p2), Schiaparelli Obs. (Dec. 9.00-01p3), Raheny Obs. (Dec. 10.01p3), McCarthy Obs. (Dec. 10.21-22p3), Rolando Ligustri via RAS Obs. Mayhill (Dec. 10.22-24p2), Tenagra II Obs. (Dec. 10.35p3), Sandlot Obs. (Dec. 10.35-36p4), Cordell-Lorenz Obs. (Dec. 10.36-40p3), Tzec Maun Obs. Mayhill (Dec. 10.42-44p6), and Great Shefford Obs. (Dec. 10.91-95p3).

<< DOU on 10 Dec. '09 >> MPEC 2009-X32 - "07:08 UT" - Daily Orbit Update

Observations of risk-listed objects
K09X00O 2009 XO (arc=1 day, H=20.0 ~339m) from Castelmartini Obs. (Dec. 9.92-94p8), Monte Baldo Obs. (Dec. 9.99-00p4), New Millennium Obs. (Dec. 9.99-00p5), and La Sagra Obs. (Dec. 10.01-02p3 & 10.15-18p4)
K08A04F 2008 AF4 (arc=2 opp, H=19.7 ~389m) from Ovidiu Vaduvescu on Mauna Kea (2007 July 28.35p1)
Observations of recently (no longer) risk-listed objects
K09WA4F 2009 WF104 (Q=5.065 AU, arc=13 days, H=16.6 ~1.62 km) from Astronomical Research Obs. Westfield (ARO Westfield) (Dec. 6.23-24p3)
K09W51X 2009 WX51 (Q=5.372 AU, arc=18 days, H=20.2 ~309m) from Madonna di Dossobuono Obs. (Dec. 9.90p3)
K09W00F 2009 WF (arc=23 days, H=19.8 ~371m) from ARO Westfield (Dec. 6.37-38p4) and LINEAR (Dec. 9.32-37p5)
J98H03J 1998 HJ3 (arc=2 opp, H=18.8 ~589m) from La Sagra Obs. (Dec. 8.95-98p3)
Observations of small asteroids (H>22.0)
K09WA6G 2009 WG106 (arc=7 days, H=25.5 ~27m) from Cordell-Lorenz Obs. (Nov. 26.44-46p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K09W11D 2009 WD11 (arc=20 days, H=22.0 ~135m) from McCarthy Obs. (Dec. 8.20-21p5) and Madonna di Dossobuono Obs. (Dec. 9.89p3)
Observations of other objects
K09X00D 2009 XD (Q=4.151 AU, arc=3 days, H=18.6 ~645m) from Eschenberg Obs. (Dec. 9.80p6), Paus Obs. (Dec. 9.90-91p3), Madonna di Dossobuono Obs. (Dec. 9.91-92p3), and Verona Obs. (Dec. 9.93p4)
K09WA4Z 2009 WZ104 (arc=15 days, H=20.7 ~245m) from McCarthy Obs. (Dec. 8.18-19p4), Eschenberg Obs. (Dec. 9.75p7), El Guijo Obs. (Dec. 9.78-79p3), Castelmartini Obs. (Dec. 9.82p5), and Madonna di Dossobuono Obs. (Dec. 9.90-91p3)
K09W07Z 2009 WZ7 (arc=17 days, H=19.8 ~371m) from ARO Westfield (Dec. 6.34-35p3)
K09W01L 2009 WL1 (arc=19 days, H=18.6 ~645m) from ARO Westfield (Dec. 6.35-37p4)
K09U17X 2009 UX17 (arc=45 days, H=21.6 ~162m) from ARO Westfield (Dec. 6.17-18p3)
K09S19T 2009 ST19 (arc=85 days, H=18.3 ~741m) from LINEAR (Dec. 9.25-29p4) and Madonna di Dossobuono Obs. (Dec. 9.88p3)
K09R00N 2009 RN (Q=4.583 AU, arc=86 days, H=20.0 ~339m) from ARO Westfield (Dec. 6.32-33p5)
K09Q34D 2009 QD34 (arc=105 days, H=18.1 ~812m) from ARO Westfield (Dec. 6.26-27p3) and Naef Obs. (Dec. 9.83-86p2)
K09N00A 2009 NA (Q=4.129 AU, arc=161 days, H=17.6 ~1.02 km) from ARO Westfield (Dec. 6.31-32p4)
K09M06X 2009 MX6 (arc=168 days, H=19.2 ~490m) from ARO Westfield (Dec. 6.25-26p3) and Verona Obs. (Dec. 9.91-92p4)
K09K04N 2009 KN4 (arc=2 opp, H=18.3 ~741m) from Naef Obs. (Dec. 9.89-91p2)
K08W59B 2008 WB59 (arc=2 opp, H=19.3 ~467m) from Eschenberg Obs. (Dec. 9.76-77p3)
K08R24Z 2008 RZ24 (arc=74 days, H=20.1 ~323m) from Vaduvescu/Mauna Kea (2008 Sept. 24.58-59p3)
K08O02X 2008 OX2 (arc=2 opp, H=20.1 ~323m) from Vaduvescu/Mauna Kea (2008 June 11.60p1)
K08E69D 2008 ED69 (i=36.3°, Q=5.051 AU, arc=3 opp, H=17.0 ~1.35 km) from Vaduvescu/Mauna Kea (2004 Dec. 15.49-52p6)
K08CB8R 2008 CR118 (arc=3 opp, H=18.9 ~562m) from Vaduvescu/Mauna Kea (2005 Jan. 7.53p1)
K07W03V 2007 WV3 (arc=2 opp, H=19.9 ~355m) from Tenagra II Obs. (Dec. 5.08-10p3)
K07U03R 2007 UR3 (arc=3 opp, H=21.1 ~204m) from ARO Westfield (Dec. 6.29-30p3)
K06U00R 2006 UR (arc=2 opp, H=19.2 ~490m) from ARO Westfield (Dec. 6.33-34p5)
K05R06Q 2005 RQ6 (arc=2 opp, H=18.9 ~562m) from El Guijo Obs. (Dec. 9.96-97p3)
K04U00L 2004 UL (q=0.093 AU, arc=3 opp, H=18.8 ~589m) from Vaduvescu/Mauna Kea (2005 Sept. 10.58-59p2)
K04B86E 2004 BE86 (arc=2 opp, H=20.9 ~224m) from Vaduvescu/Mauna Kea (2003 Dec. 27.60-61p3)
K02W00P 2002 WP (arc=3 opp, H=18.4 ~708m) from McCarthy Obs. (Dec. 8.19-20p3) and San Benedetto Po Obs. (Dec. 8.81p3)
K02N16W 2002 NW16 (arc=2 opp, H=18.1 ~812m) from Castelmartini Obs. (Dec. 9.69p3)
K00GC7U 2000 GU127 (arc=7 opp, H=18.5 ~676m) from ARO Westfield (Dec. 6.28-29p3)
M6198 226198 2002 UN3 from LINEAR (Dec. 9.27-31p4)
K9924 209924 2005 WS55 from Vaduvescu/Mauna Kea (2004 June 24.47p1 & 2004 June 25.47p1)
H1819 171819 2001 FZ6 from Vaduvescu/Mauna Kea (2005 Aug. 30.46p1)
G4342 164342 2005 CP from Vaduvescu/Mauna Kea (2004 Nov. 22.60p1)
F3315 153315 2001 NH6 from Vaduvescu/Mauna Kea (2008 June 12.54p1)
D8852 138852 2000 WN10 from LINEAR (Dec. 9.21-25p4)
87311 87311 2000 QJ1 from Vaduvescu/Mauna Kea (2006 Aug. 1.44-47p3)
68359 68359 2001 OZ13 from Vaduvescu/Mauna Kea (2005 Sept. 9.59p1)
54071 54071 2000 GQ146 from Vaduvescu/Mauna Kea (2008 Oct. 4.48p2)
35396 35396 1997 XF11 from La Sagra Obs. (Dec. 8.98-01p3)
12711 12711 Tukmit (1991 BB) from Castelmartini Obs. (Dec. 9.71-72p3)
09202 9202 1993 PB from Castelmartini Obs. (Dec. 9.70-71p3)
07092 7092 Cadmus (1992 LC) from Vaduvescu/Mauna Kea (2003 Sept. 23.63p1)
06569 6569 Ondaatje (1993 MO) from Vaduvescu/Mauna Kea (2005 Jan. 8.35-43p3)
04587 4587 Rees (3239 T-2) from Vaduvescu/Mauna Kea (2007 March 18.31-36p3)
04015 4015 Wilson-Harrington (1979 VA) from Nazaret Obs. (Dec. 8.80-82p4), San Benedetto Po Obs. (Dec. 8.80-81p4), Gualba Obs. (Dec. 9.75p2), and Rodeno Obs. (Dec. 9.82-83p3)
02059 2059 Baboquivari (1963 UA) from Vaduvescu/Mauna Kea (2004 March 29.52-57p3)

MPEC 2009-X31 - "00:01 UT" - 2009 XO

K09X00O 2009 XO (risk-listed, H=20.0 ~339m) was discovered at 0338 UT on 9 Dec. by La Sagra Obs., which observed it at Dec. 9.15-24p5 and 9.94-95p3. The discovery was confirmed by Eschenberg Obs. (Dec. 9.83-85p3), Farra d'Isonzo Obs. (Dec. 9.90-93p3), Schiaparelli Obs. (Dec. 9.96-97p5), Paus Obs. (Dec. 9.97p2), and Monte Baldo Obs. (Dec. 9.98-99p3).

Observers on 10 December '09

A total of 28 observing facilities appeared in this day's MPECs.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 12 in MPEC 2009-X32 -- 2009 WZ7, 2009 WL1, 2009 WF104, 2009 WF, 2009 UX17, 2009 RN, 2009 QD34, 2009 NA, 2009 MX6, 2007 UR3, 2006 UR, 2000 GU127
`160`	Castelmartini Obs. in Italy, 5 in MPEC 2009-X32 -- 2009 XO, 2009 WZ104, 2002 NW16, 12711, 9202
`850`	Cordell-Lorenz Obs. in Tennessee, 2 in MPECs 2009-X32 & 2009-X33 -- 2009 XV, 2009 WG106
`J27`	El Guijo Obs. in Spain, 2 in MPEC 2009-X32 -- 2009 WZ104, 2005 RQ6
`151`	Eschenberg Obs. in Switzerland, 4 in MPECs 2009-X31 & 2009-X32 -- 2009 XO, 2009 XD, 2009 WZ104, 2008 WB59
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2009-X31 -- 2009 XO
`J95`	Great Shefford Obs. in England, 1 in MPEC 2009-X33 -- 2009 XV
`442`	Gualba Obs. in Spain, 1 in MPEC 2009-X32 -- 4015
`704`	LINEAR in New Mexico, 5 in MPECs 2009-X32 & 2009-X33 -- 2009 XV, 2009 WF, 2009 ST19, 226198, 138852
`J75`	La Sagra Obs. in Spain, 3 in MPECs 2009-X31 & 2009-X32 -- 2009 XO, 1998 HJ3, 35396
`560`	Madonna di Dossobuono Obs. in Italy, 5 in MPEC 2009-X32 -- 2009 XD, 2009 WZ104, 2009 WX51, 2009 WD11, 2009 ST19
`568[`	Ovidiu Vaduvescu on Mauna Kea in Hawaii, 18 in MPEC 2009-X32 -- 2008 RZ24, 2008 OX2, 2008 ED69, 2008 CR118, 2008 AF4, 2004 UL, 2004 BE86, 87311, 68359, 54071, 209924, 171819, 164342, 153315, 7092, 6569, 4587, 2059
`932`	McCarthy Obs. in Connecticut, 4 in MPECs 2009-X32 & 2009-X33 -- 2009 XV, 2009 WZ104, 2009 WD11, 2002 WP
`A99`	Monte Baldo Obs. in Italy, 2 in MPECs 2009-X31, 2009-X32 & 2009-X33 -- 2009 XV, 2009 XO
`A13`	Naef Obs. in Switzerland, 2 in MPEC 2009-X32 -- 2009 QD34, 2009 KN4
`J47`	Nazaret Obs. in Spain, 1 in MPEC 2009-X32 -- 4015
`A24`	New Millennium Obs. in Italy, 2 in MPECs 2009-X32 & 2009-X33 -- 2009 XV, 2009 XO
`B49`	Paus Obs. in Spain, 3 in MPECs 2009-X31, 2009-X32 & 2009-X33 -- 2009 XV, 2009 XO, 2009 XD
`H06*`	Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-X33 -- 2009 XV
`J41`	Raheny Obs. in Ireland, 1 in MPEC 2009-X33 -- 2009 XV
`473`	Remanzacco Obs. in Italy, 1 in MPEC 2009-X33 -- 2009 XV
`939`	Rodeno Obs. in Spain, 1 in MPEC 2009-X32 -- 4015
`434`	San Benedetto Po Obs. in Italy, 2 in MPEC 2009-X32 -- 2002 WP, 4015
`H36`	Sandlot Obs. in Kansas, 1 in MPEC 2009-X33 -- 2009 XV
`204`	Schiaparelli Obs. in Italy, 2 in MPECs 2009-X31 & 2009-X33 -- 2009 XV, 2009 XO
`926`	Tenagra II Obs. in Arizona, 2 in MPECs 2009-X32 & 2009-X33 -- 2009 XV, 2007 WV3
`H10`	Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2009-X33 -- 2009 XV
`A48`	Verona Obs. in Italy, 2 in MPEC 2009-X32 -- 2009 XD, 2009 MX6

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

Impact Risk Monitoring on 10 December '09

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2323 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 XO	JPL Sentry	1540	2015-2109	347	6.7e-06	-2.57	-3.21	0	JPL #2 for the day: "Analysis based on 48 observations spanning 1.0240 days (2009-Dec-09.152 to 2009-Dec-10.17595)." Diameter approximately 0.345 km. from mean, weighted H=20.0.
2009 XO	NEODyS	1540	2015-2087	43	2.98e-06	-2.71	-3.23	0	NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2009/12/09.153 to 2009/12/10.177."

2008 AF4	JPL Sentry	1540	2099-2100	2	5.9e-07	-3.93	-3.93	0	JPL: "Analysis based on 607 observations spanning 296.97 days (2007-Jul-28.349 to 2008-May-20.315005)." Diameter approximately 0.400 km. from mean, weighted H=19.7.

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 10 December '09

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

0004 12/11	Grabbed MPEC 2009-X33 - 2009 XV - see above
1540	Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above Noted that JPL Sentry has updated its 2009 XO risk assessment - see above Noted that NEODyS has posted 2009 XO as an impact risk - see above Grabbed MPEC 2009-X32 - Daily Orbit Update - see above
0532	Noted that JPL Sentry has posted 2009 XO as an impact risk - see above
0017	Grabbed MPEC 2009-X31 - 2009 XO - see above

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