2009-02-21 Tracking News

Contents on 21 February '09

IAU Minor Planet Center
- NEOCP Activity -- four listings: 4 updated
- New MPECs -- seven MPECs
Observers -- 23 observing facilities
Impact Risk Monitoring -- five objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Earth's Busy Neighborhood Traffic Report
Ephemerides for risk-rated and nearby objects
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 21 February '09

The MPC's NEO Confirmation Page has 4 listings: 4 updated

When last checked at 2303 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of twelve objects listed on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs on 21 February '09

Minor Planet Electronic Circulars

As of last check at 2303 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-D41 time-stamped "04:00 UT" - 2006 CX10 - see below
MPEC 2009-D42 time-stamped "07:07 UT" - Daily Orbit Update - see below
MPEC 2009-D43 time-stamped "14:25 UT" - 2009 DN4 - see below
MPEC 2009-D44 time-stamped "14:28 UT" - 2009 DO4 - see below
MPEC 2009-D45 time-stamped "14:32 UT" - 2009 DP4 - see below
MPEC 2009-D46 time-stamped "14:36 UT" - 2009 DQ4 - see below
MPEC 2009-D47 time-stamped "22:00 UT" - 2009 DG9

MPEC 2009-D47 - "22:00 UT" - 2009 DG9

K09D09G 2009 DG9 (Q=4.567 AU, H=20.9 ~224m) was discovered at 0712 UT on 21 Feb. by the Catalina Sky Survey (CSS), which observed it at Feb. 21.30-38p16 and 21.45-46p4. The discovery was confirmed by Magdalena Ridge Obs. (MRO) (Feb. 21.38-40p4) and Libbiano Obs. (Feb. 21.89-90p3).

MPEC 2009-D46 - "14:36 UT" - 2009 DQ4

K09D04Q 2009 DQ4 (H=21.0 ~214m) was discovered at 1510 UT on 20 Feb. by the Siding Spring Survey (SSS), which observed it at Feb. 20.63-67p5 and 20.76-77p7. The discovery was confirmed by Saint-Barthelemy Obs. (Feb. 20.94-96p3), CEAMIG-REA (Feb. 21.07-08p3), Sabino Canyon Obs. (Feb. 21.23p3), and MRO (Feb. 21.26-27p4).

MPEC 2009-D45 - "14:32 UT" - 2009 DP4

K09D04P 2009 DP4 (small asteroid, H=23.0 ~85m) was discovered at 1123 UT on 20 Feb. by CSS, which observed it at Feb. 20.47-53p12. The discovery was confirmed by Saint-Barthelemy Obs. (Feb. 20.98-01p4), Calar Alto Obs. (Feb. 21.10p3), Sabino Canyon Obs. (Feb. 21.33-34p3), and MRO (Feb. 21.36-37p3).

MPEC 2009-D44 - "14:28 UT" - 2009 DO4

K09D04O 2009 DO4 (i=37.7°, Q=4.066 AU, H=21.3 ~186m) was discovered at 0659 UT on 20 Feb. by LINEAR, which observed it at Feb. 20.29-34p5. The discovery was confirmed by Calar Alto Obs. (Feb. 21.10p3), CEAMIG-REA (Feb. 21.15-16p3), Sabino Canyon Obs. (Feb. 21.20-21p3), and MRO (Feb. 21.30-31p4).

MPEC 2009-D43 - "14:25 UT" - 2009 DN4

K09D04N 2009 DN4 (small asteroid, Earth MOID=2.6 LD, H=26.0 ~21m) was discovered at 0541 UT on 20 Feb. by the Mt. Lemmon Survey (MLS), which observed it at Feb. 20.19-26p8. The discovery was confirmed by MRO (Feb. 20.31-32p4, 21.12-16p5 & 21.31-32p3). This object will be coming within ten lunar distances (LD) of Earth, reaching 9.1 LD on 28 Feb.

<< DOU on 21 Feb. '09 >> MPEC 2009-D42 - "07:07 UT" - Daily Orbit Update

Observations of risk-listed objects
K09D03R 2009 DR3 (arc=1 day, H=21.4 ~178m) from LINEAR (Feb. 20.29-34p5)
K09D01M 2009 DM1 (Q=4.651 AU, arc=1 day, H=17.0 ~1.35 km) from LINEAR (Feb. 20.11-15p4)
K09D01F 2009 DF1 (arc=1 day, H=20.6 ~257m) from MRO (Feb. 20.51-52p4)
K09D01E 2009 DE1 (small asteroid, arc=1 day, H=24.3 ~47m) from MRO (Feb. 20.49-50p4)
K09B58F 2009 BF58 (small asteroid, arc=23 days, H=27.3 ~12m) from MRO (Feb. 20.27-28p2 at R=22.7-8)
Observations of recently (no longer) risk-listed objects
K09C05Q 2009 CQ5 (arc=6 days, H=17.6 ~1.02 km) from the Spacewatch 1.8m telescope (Feb. 20.10-11p3) and MLS (Feb. 20.11p4)
K09C02A 2009 CA2 (arc=17 days, H=18.8 ~589m) from Astronomical Research Obs. (ARO) (Feb. 20.48-49p3)
K09B58J 2009 BJ58 (arc=22 days, H=19.1 ~513m) from Spacewatch 1.8m (Feb. 20.12p3) and Desert Moon Obs. (Feb. 20.15-17p3)
Observations of small asteroids (H>22.0)
K09D01C 2009 DC1 (arc=1 day, H=24.0 ~54m) from Kline Obs. (Feb. 20.26-28p3)
K09D00V 2009 DV (arc=3 days, H=24.8 ~37m) from MLS (Feb. 20.31-34p4)
K09D00D 2009 DD (arc=4 days, H=25.7 ~25m) from LINEAR (Feb. 20.35-40p5)
K09C01R 2009 CR1 (arc=17 days, H=24.6 ~41m) from Spacewatch 1.8m (Feb. 20.20p2)
Observations of almost-small asteroids (21.7<H<=22.0)
K09C05O 2009 CO5 (arc=18 days, H=21.8 ~148m) from Lumezzane Obs. (Feb. 18.91-92p4), LINEAR (Feb. 20.23-28p4), and Petit Jean Mtn. South Obs. (PJMSO) (Feb. 20.28p6)
Observations of other objects
K09C05S 2009 CS5 (arc=6 days, H=19.4 ~446m) from Farpoint Obs. (Feb. 20.23-24p2)
K09C05P 2009 CP5 (arc=5 days, H=21.3 ~186m) from Lumezzane Obs. (Feb. 18.83p3)
K09C01S 2009 CS1 (arc=17 days, H=21.0 ~214m) from Desert Moon Obs. (Feb. 20.29-33p3)
K09B77D 2009 BD77 (arc=21 days, H=20.4 ~282m) from Rio Cuarto Obs. (Feb. 20.19-24p4) and PJMSO (Feb. 20.43-44p7)
K09B71A 2009 BA71 (arc=2 opp, H=20.7 ~245m) from PJMSO (Feb. 20.34-36p7)
K09B58P 2009 BP58 (arc=22 days, H=18.6 ~645m) from PJMSO (Feb. 20.36-37p6)
K09B00B 2009 BB (q=0.373 AU, Q=4.464 AU, arc=35 days, H=18.4 ~708m) from Desert Moon Obs. (Feb. 20.09-12p3)
K09A15L 2009 AL15 (arc=44 days, H=21.3 ~186m) from ARO (Feb. 20.11-14p3 at V=21.7-22.2)
K09A00T 2009 AT (Q=7.314 AU, arc=49 days, H=21.0 ~214m) from ARO (Feb. 20.07-10p3 at V=22.3-4) and Spacewatch 1.8m (Feb. 20.24-25p3)
K08Y28Z 2008 YZ28 (Q=4.049 AU, arc=52 days, H=20.0 ~339m) from Spacewatch 1.8m (Feb. 20.15-16p3)
K08Y00A 2008 YA (Q=4.836 AU, arc=66 days, H=18.0 ~851m) from Spacewatch 1.8m (Feb. 20.14p3)
K08U00C 2008 UC (arc=124 days, H=18.9 ~562m) from ARO (Feb. 20.06p2)
K08TF7E 2008 TE157 (Q=4.444 AU, arc=141 days, H=20.8 ~234m) from LINEAR (Feb. 20.23-28p4)
K08R98M 2008 RM98 (Q=4.198 AU, arc=166 days, H=20.5 ~269m) from PJMSO (Feb. 20.28-29p6)
K08Q03T 2008 QT3 (arc=179 days, H=18.8 ~589m) from PJMSO (Feb. 20.27-28p6)
K08E32A 2008 EA32 (IEO, Q=0.804 AU, arc=2 opp, H=16.5 ~1.70 km) from B. Conklin via RAS Obs. Mayhill (Feb. 21.07-11p3)
K08E05E 2008 EE5 (i=44.8°, arc=2 opp, H=19.7 ~389m) from program code 9 via Faulkes Telescope North (Feb. 19.30p2)
K08E00E 2008 EE (arc=2 opp, H=19.7 ~389m) from Lumezzane Obs. (Feb. 18.00p3) and PJMSO (Feb. 20.29-30p6)
K07B02T 2007 BT2 (arc=3 opp, H=17.2 ~1.23 km) from Lumezzane Obs. (Feb. 19.08-09p4)
K06W02Z 2006 WZ2 (arc=3 opp, H=16.9 ~1.41 km) from PJMSO (Feb. 20.33p6)
K06S06D 2006 SD6 (arc=2 opp, H=20.2 ~309m) from Spacewatch 1.8m (Feb. 20.43-44p3)
K06B10C 2006 BC10 (arc=3 opp, H=19.5 ~426m) from PJMSO (Feb. 20.33-34p5)
K05GC0C 2005 GC120 (arc=4 opp, H=19.7 ~389m) from ARO (Feb. 20.45-48p3 at V=21.9-22.1) and Spacewatch 1.8m (Feb. 20.52-53p3)
K04E09U 2004 EU9 (arc=3 opp, H=18.8 ~589m) from PJMSO (Feb. 20.39-40p6) and CSS (Feb. 20.40-43p4)
K02F06B 2002 FB6 (arc=4 opp, H=17.5 ~1.07 km) from Desert Moon Obs. (Feb. 20.36-41p3)
K02E02Y 2002 EY2 (arc=3 opp, H=19.2 ~490m) from Spacewatch 1.8m (Feb. 20.45-48p3)
K01G02Q 2001 GQ2 (arc=2 opp, H=20.1 ~323m) from ARO (Feb. 20.38-40p3 at V=22.2-6)
K00J78O 2000 JO78 (arc=5 opp, H=17.8 ~933m) from MLS (Feb. 20.32-34p4)
K00A06E 2000 AE6 (Q=4.220 AU, arc=3 opp, H=17.5 ~1.07 km) from LINEAR (Feb. 20.30-32p3)
K6378 206378 2003 RB from the Spacewatch 0.9m telescope (Feb. 20.19-22p3)
K6359 206359 2003 QM47 from Lumezzane Obs. (Feb. 19.00-01p4)
K5744 205744 2002 BK25 from CSS (Feb. 20.50-52p4)
K3217 203217 2001 FX9 from CSS (Feb. 20.23-24p4)
J4386 194386 2001 VG5 from CSS (Feb. 20.14-16p4)
G2900 162900 2001 HG31 from GiaGa Obs. (Feb. 18.96-98p2 & 19.94-96p2)
G2361 162361 2000 AF6 from MLS (Feb. 20.16-18p4)
F3243 153243 2001 AU47 from SSS (Feb. 20.62-66p4)
E3651 143651 2003 QO104 from Lumezzane Obs. (Feb. 19.01-02p4)
E2348 142348 2002 RX211 from LINEAR (Feb. 20.23-28p5)
E1495 141495 2002 EZ11 from Spacewatch 0.9m (Feb. 20.41-45p3)
D8883 138883 2000 YL29 from CSS (Feb. 20.49-51p4)
D7925 137925 2000 BJ19 from GiaGa Obs. (Feb. 18.99-00p2 & 19.99-00p2)
A8519 108519 2001 LF from SSS (Feb. 20.60-62p3)
A1873 101873 1999 NC5 from Lumezzane Obs. (Feb. 18.80p4)
99935 99935 2002 AV4 from LINEAR (Feb. 20.37-40p4) and CSS (Feb. 20.44-46p4)
85990 85990 1999 JV6 from CSS (Feb. 20.45-47p4)
85867 85867 1999 BY9 from Spacewatch 0.9m (Feb. 20.29-33p3)
38086 38086 Beowulf (1999 JB) from LINEAR (Feb. 20.42-44p3)
35396 35396 1997 XF11 from CSS (Feb. 20.40-43p4)
18109 18109 2000 NG11 from MLS (Feb. 20.32-35p4)
16834 16834 1997 WU22 from Faulkes North/code 9 (Feb. 19.30p3)
11405 11405 1999 CV3 from CSS (Feb. 20.12-13p3)
06050 6050 Miwablock (1992 AE) from LINEAR (Feb. 20.35-40p5)
05693 5693 1993 EA from CSS (Feb. 20.50-52p4)
04179 4179 Toutatis (1989 AC) from Lumezzane Obs. (Feb. 18.93p4)
03102 3102 Krok (1981 QA) from Spacewatch 0.9m (Feb. 20.47-50p3)
01863 1863 Antinous (1948 EA) from Lumezzane Obs. (Feb. 18.96p4)

MPEC 2009-D41 - "04:00 UT" - 2006 CX10

K06C10X 2006 CX10 (H=17.7 ~977m) from David Tholen's team on Mauna Kea (Nov. 20.38-40p3 at R=23.0-1) and David Tholen's team via Faulkes Telescope North (Feb. 1.24p1 at R=23.7)

Observers on 21 February '09

A total of 23 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 6 in MPEC 2009-D42 -- 2009 CA2, 2009 AT, 2009 AL15, 2008 UC, 2005 GC120, 2001 GQ2
`I77`	CEAMIG-REA in Brazil, 2 in MPECs 2009-D44 & 2009-D46 -- 2009 DQ4, 2009 DO4
`493`	Calar Alto Obs. in Spain, 2 in MPECs 2009-D44 & 2009-D45 -- 2009 DP4, 2009 DO4
`703`	Catalina Sky Survey (CSS) in Arizona, 12 in MPECs 2009-D42, 2009-D45 & 2009-D47 -- 2009 DP4, 2009 DG9, 2004 EU9, 99935, 85990, 35396, 205744, 203217, 194386, 138883, 11405, 5693
`448`	Desert Moon Obs. in New Mexico, 4 in MPEC 2009-D42 -- 2009 CS1, 2009 BJ58, 2009 BB, 2002 FB6
`734`	Farpoint Obs. in Kansas, 1 in MPEC 2009-D42 -- 2009 CS5
`F658`	David Tholen's team via Faulkes Telescope North in Hawaii, 1 in MPEC 2009-D41 -- 2006 CX10
`F659`	program code 9 via Faulkes Telescope North in Hawaii, 2 in MPEC 2009-D42 -- 2008 EE5, 16834
`203`	GiaGa Obs. in Italy, 2 in MPEC 2009-D42 -- 162900, 137925
`H05`	Kline Obs. in Colorado, 1 in MPEC 2009-D42 -- 2009 DC1
`704`	LINEAR in New Mexico, 11 in MPECs 2009-D42 & 2009-D44 -- 2009 DR3, 2009 DO4, 2009 DM1, 2009 DD, 2009 CO5, 2008 TE157, 2000 AE6, 99935, 38086, 142348, 6050
`B33`	Libbiano Obs. in Italy, 1 in MPEC 2009-D47 -- 2009 DG9
`130`	Lumezzane Obs. in Italy, 9 in MPEC 2009-D42 -- 2009 CP5, 2009 CO5, 2008 EE, 2007 BT2, 206359, 143651, 101873, 4179, 1863
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 8 in MPECs 2009-D42, 2009-D43, 2009-D44, 2009-D45, 2009-D46 & 2009-D47 -- 2009 DQ4, 2009 DP4, 2009 DO4, 2009 DN4, 2009 DG9, 2009 DF1, 2009 DE1, 2009 BF58
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2009-D41 -- 2006 CX10
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2009-D42 & 2009-D43 -- 2009 DV, 2009 DN4, 2009 CQ5, 2000 JO78, 18109, 162361
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 10 in MPEC 2009-D42 -- 2009 CO5, 2009 BP58, 2009 BD77, 2009 BA71, 2008 RM98, 2008 QT3, 2008 EE, 2006 WZ2, 2006 BC10, 2004 EU9
`H06\`	B. Conklin via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-D42 -- 2008 EA32
`I20`	Rio Cuarto Obs. in Argentina, 1 in MPEC 2009-D42 -- 2009 BD77
`854`	Sabino Canyon Obs. in Arizona, 3 in MPECs 2009-D44, 2009-D45 & 2009-D46 -- 2009 DQ4, 2009 DP4, 2009 DO4
`B04`	Saint-Barthelemy Obs. in Italy, 2 in MPECs 2009-D45 & 2009-D46 -- 2009 DQ4, 2009 DP4
`E12`	Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2009-D42 & 2009-D46 -- 2009 DQ4, 153243, 108519
`691`	Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2009-D42 -- 85867, 206378, 141495, 3102
`291`	Spacewatch 1.8m telescope in Arizona, 9 in MPEC 2009-D42 -- 2009 CR1, 2009 CQ5, 2009 BJ58, 2009 AT, 2008 YZ28, 2008 YA, 2006 SD6, 2005 GC120, 2002 EY2

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

Impact Risk Monitoring on 21 February '09

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2303 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 DR3	NEODyS	1600	2019-2048	6	3.87e-07	-4.35	-4.50	0	NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2009/02/20.289 to 2009/02/20.834."
2009 DR3	JPL Sentry	1559	2015-2107	74	1.2e-06	-4.07	-4.36	0	JPL: "Analysis based on 27 observations spanning .54488 days (2009-Feb-20.28832 to 2009-Feb-20.8332)." Diameter approximately 0.190 km. from mean, weighted H=21.3.

2009 DM1	NEODyS	1600	2010-2090	39	2.34e-08	-3.09	-3.23	0	NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2009/02/19.116 to 2009/02/20.153."
2009 DM1	JPL Sentry	1559	2010-2108	129	1.0e-07	-2.74	-2.96	0	JPL: "Analysis based on 25 observations spanning 1.0373 days (2009-Feb-19.11474 to 2009-Feb-20.15204)." Diameter approximately 1.200 km. from mean, weighted H=17.3.

2009 DF1	JPL Sentry	1559	R E M O V E D						JPL: Risk listing removed at 0949 UTC.
2009 DF1	NEODyS	1559	R E M O V E D						-

2009 DE1	JPL Sentry	1559	2095	1	3.6e-08	-7.14	-7.14	0	JPL: "Analysis based on 23 observations spanning 1.1139 days (2009-Feb-19.38939 to 2009-Feb-20.50327)." Diameter approximately 0.047 km. from mean, weighted H=24.3.
2009 DE1	NEODyS	1559	R E M O V E D						-

2009 BF58	NEODyS	1600	2057-2090	39	2.08e-04	-5.08	-5.31	0	NEODyS: "Based on 52 optical observations (of which 0 are rejected as outliers) from 2009/01/28.263 to 2009/02/20.285."
2009 BF58	JPL Sentry	1559	2057-2087	25	2.1e-04	-5.07	-5.30	0	JPL: "Analysis based on 52 observations spanning 23.021 days (2009-Jan-28.26267 to 2009-Feb-20.28409)." Diameter approximately 0.012 km. from mean, weighted H=27.3.

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 21 February '09

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

2303	Grabbed MPEC 2009-D47 - 2009 DG9 - see above
1600	Noted that NEODyS has updated its 2009 BF58 risk assessment - see above Grabbed MPEC 2009-D42 - Daily Orbit Update - see above Grabbed MPEC 2009-D46 - 2009 DQ4 - see above
1559	Noted that JPL Sentry has updated its 2009 BF58 risk assessment - see above Noted that JPL Sentry has updated its 2009 DE1 risk assessment - see above Noted that NEODyS has removed 2009 DE1 as an impact risk - see above Noted that JPL Sentry has removed 2009 DF1 as an impact risk - see above Noted that NEODyS has removed 2009 DF1 as an impact risk - see above Noted that JPL Sentry has updated its 2009 DM1 risk assessment - see above Noted that NEODyS has posted 2009 DM1 as an impact risk - see above Noted that JPL Sentry has posted 2009 DR3 as an impact risk - see above Noted that NEODyS has posted 2009 DR3 as an impact risk - see above Grabbed MPEC 2009-D43 - 2009 DN4 - see above Grabbed MPEC 2009-D44 - 2009 DO4 - see above Grabbed MPEC 2009-D45 - 2009 DP4 - see above
0503	Grabbed MPEC 2009-D41 - 2006 CX10 - see above

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