2008-03-02 Tracking News

Contents on 2 March '08

IAU Minor Planet Center
- NEOCP Activity -- 21 listings: 4 new, 17 updated
- New MPECs -- one MPEC
- Observers -- fourteen 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 2 March '08

The MPC's NEO Confirmation Page has 21 listings: 4 new, 17 updated

When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and seventeen updated listings. Of these, nine were "one nighters." So far The Tracking News has counted a total of 24 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 2 March '08

Minor Planet Electronic Circulars

As of last check at 2355 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 2 Mar. '08 >> MPEC 2008-E11 - "07:08 UT" - Daily Orbit Update

Observations of risk-listed objects
K08D22X 2008 DX22 (small asteroid, arc=1 day, H=24.5 ~43m) from Astronomical Research Obs. (ARO) (March 1.10-11p4)
K08D05J 2008 DJ5 (arc=2 days, H=20.0 ~339m) from the Spacewatch 1.8m telescope (March 1.35-36p3)
K08D05G 2008 DG5 (arc=2 days, H=19.5 ~426m) from Spacewatch 1.8m (March 1.23-25p3)
K08A04F 2008 AF4 (arc=51 days, H=19.7 ~389m) from Petit Jean Mtn. South Obs. (PJMSO) (March 1.30-31p6)
Observations of recently (no longer) risk-listed objects
K08D04G 2008 DG4 (small asteroid, Q=4.073 AU, arc=3 days, H=23.7 ~62m) from Spacewatch 1.8m (March 1.31-32p3)
K08D00V 2008 DV (arc=4 days, H=18.1 ~812m) from Spacewatch 1.8m (March 1.15-16p3) and the Mt. Lemmon Survey (MLS) (March 1.23-25p3)
K08D00J 2008 DJ (arc=6 days, H=20.5 ~269m) from PJMSO (March 1.28p6), LINEAR (March 1.28-32p5), and Madonna di Dossobuono Obs. (March 1.88-89p3)
K08C22D 2008 CD22 (small asteroid, arc=22 days, H=22.1 ~129m) from Verona Obs. (March 1.99-00p4)
K08C22B 2008 CB22 (arc=22 days, H=19.7 ~389m) from Desert Moon Obs. (March 1.38-40p3) and PJMSO (March 1.42-43p6)
K08B18T 2008 BT18 (arc=31 days, H=18.3 ~741m) from PJMSO (March 1.29-30p6) and Madonna di Dossobuono Obs. (March 1.93-94p3)
Observations of small asteroids (H>22.0)
K08D22Y 2008 DY22 (arc=1 day, H=24.1 ~51m) from ARO (March 1.34p3) and LINEAR (March 1.39-44p10)
K08D22V 2008 DV22 (Q=4.569 AU, arc=2 days, H=23.4 ~71m) from ARO (March 1.15-16p4)
K08CB9K 2008 CK119 (arc=17 days, H=24.4 ~45m) from Spacewatch 1.8m (March 1.21-22p3)
K08C00O 2008 CO (arc=28 days, H=22.8 ~93m) from Spacewatch 1.8m (March 1.17-18p3)
K07D00A 2007 DA (arc=2 opp, H=22.4 ~112m) from MLS (March 1.26-28p4)
K03T01M 2003 TM1 (arc=2 opp, H=22.1 ~129m) from LINEAR (Feb. 29.33-36p4 & March 1.22-26p5) and ARO (March 1.14p4)
Observations of other objects
K08D17G 2008 DG17 (i=40.1°, arc=2 days, H=19.8 ~371m) from ARO (March 1.07-09p10 & 2.05-06p3) and LINEAR (March 1.10-15p5)
K08D00W 2008 DW (arc=4 days, H=21.6 ~162m) from Spacewatch 1.8m (March 1.33-34p3)
K08CB8Z 2008 CZ118 (arc=18 days, H=18.4 ~708m) from Desert Moon Obs. (March 1.35-36p3)
K08CB6R 2008 CR116 (arc=19 days, H=20.5 ~269m) from the Catalina Sky Survey (CSS) (March 1.31-33p4)
K08C72L 2008 CL72 (arc=28 days, H=19.8 ~371m) from Madonna di Dossobuono Obs. (March 1.90p3)
K08C71D 2008 CD71 (i=47.2°, q=0.364 AU, arc=21 days, H=19.6 ~407m) from CSS (March 1.28-30p4)
K08C22A 2008 CA22 (arc=22 days, H=20.6 ~257m) from Spacewatch 1.8m (March 1.19-20p3)
K08C01N 2008 CN1 (arc=28 days, H=20.6 ~257m) from PJMSO (March 1.26-27p6), Hamamatsu-Yuto Obs. (March 1.59-60p3), and Madonna di Dossobuono Obs. (March 1.86-87p3)
K08C01L 2008 CL1 (arc=29 days, H=19.4 ~446m) from PJMSO (March 1.36-37p7), Hamamatsu-Yuto Obs. (March 1.74-77p7), and Verona Obs. (March 1.97p4)
K08B22C 2008 BC22 (arc=47 days, H=19.6 ~407m) from LINEAR (Feb. 12.36-40p4)
K08A33M 2008 AM33 (arc=46 days, H=21.3 ~186m) from Desert Moon Obs. (March 1.42-45p3)
K08A00E 2008 AE (arc=2 opp, H=19.7 ~389m) from LINEAR (March 1.33-37p4) and PJMSO (March 1.40-41p6)
K07Y01X 2007 YX1 (Q=4.542 AU, arc=2 opp, H=17.4 ~1.12 km) from MLS (March 1.20-22p4)
K07Y00K 2007 YK (arc=2 opp, H=17.6 ~1.02 km) from PJMSO (March 1.32-33p5)
K07V04Q 2007 VQ4 (arc=3 opp, H=15.8 ~2.34 km, q=1.271 AU) from Hamamatsu-Yuto Obs. (Feb. 28.80p3)
K07U06S 2007 US6 (arc=3 opp, H=18.3 ~741m) from CSS (March 1.17-18p4)
K07T24U 2007 TU24 (arc=142 days, H=20.3 ~295m) from Lumijoki Obs. (Feb. 26.93-95p4) and PJMSO (March 1.37-39p5)
K07T08G 2007 TG8 (Q=4.306 AU, arc=170 days, H=18.6 ~645m) from PJMSO (March 1.35-36p5) and Hamamatsu-Yuto Obs. (March 1.71-72p3)
K06D62U 2006 DU62 (arc=3 opp, H=18.0 ~851m) from CSS (March 1.22-24p4) and PJMSO (March 1.31p5)
K05G21P 2005 GP21 (arc=2 opp, H=19.7 ~389m) from Spacewatch 1.8m (March 1.50-51p3)
K05E70K 2005 EK70 (arc=4 opp, H=17.4 ~1.12 km) from PJMSO (March 1.25p6) and Madonna di Dossobuono Obs. (March 1.85p3)
K05B02E 2005 BE2 (arc=2 opp, H=18.2 ~776m) from PJMSO (March 1.34-35p5)
K03G00W 2003 GW (i=49.4°, arc=3 opp, H=16.7 ~1.55 km) from the Siding Spring Survey (SSS) (March 1.61-64p4)
K03F00H 2003 FH (arc=5 opp, H=18.9 ~562m) from Desert Moon Obs. (March 1.48-52p3)
K03A18K 2003 AK18 (arc=3 opp, H=19.7 ~389m) from CSS (March 1.32-34p3)
K02T66D 2002 TD66 (arc=4 opp, H=20.3 ~295m) from PJMSO (March 1.27p6), Hamamatsu-Yuto Obs. (March 1.62-64p4), and Madonna di Dossobuono Obs. (March 1.87p3)
K02AC9J 2002 AJ129 (q=0.117 AU, arc=3 opp, H=18.5 ~676m) from Spacewatch 1.8m (March 1.52-54p3)
K00DA7P 2000 DP107 (arc=4 opp, H=18.2 ~776m) from PJMSO (March 1.34p5)
J98S70J 1998 SJ70 (arc=2 opp, H=18.3 ~741m) from MLS (March 1.32-34p4 & 1.40-42p4)
J93T02Q 1993 TQ2 (arc=2 opp, H=20.0 ~339m) from MLS (March 1.41-42p4)
F4589 154589 2003 MX2 from MLS (March 1.26-28p4)
F3591 153591 2001 SN263 from Verona Obs. (Feb. 14.89-90p4), Hamamatsu-Yuto Obs. (Feb. 28.64-65p9), and CSS (March 1.23-24p3)
E4922 144922 2005 CK38 from MLS (March 1.41-42p4)
E4901 144901 2004 WG1 from LINEAR (March 1.28-32p5)
E3678 143678 2003 SA224 from LINEAR (March 1.10-14p4)
D7170 137170 1999 HF1 from Ametlla del Valles Obs. (March 1.19-20p9)
D7099 137099 1998 YW3 from MLS (March 1.17-19p4)
99935 99935 2002 AV4 from LINEAR (March 1.11-13p3)
86667 86667 2000 FO10 from LINEAR (March 1.45-50p5)
85839 85839 1998 YO4 from CSS (March 1.47-49p4)
68359 68359 2001 OZ13 from LINEAR (March 1.16-21p5)
68346 68346 2001 KZ66 from CSS (March 1.28-30p4)
38091 38091 1999 JT3 from MLS (March 1.41-42p4)
22099 22099 2000 EX106 from Capannoli Obs. (March 2.04p2)
21277 21277 1996 TO5 from CSS (March 1.11-13p4)
18736 18736 1998 NU from MLS (March 1.17-19p4)
11398 11398 1998 YP11 from PJMSO (March 1.40p5)
05836 5836 1993 MF from LINEAR (March 1.39-44p5)
01620 1620 Geographos (1951 RA) from PJMSO (March 1.33p5) and Madonna di Dossobuono Obs. (March 1.91p3)

Observers on 2 March '08

Fourteen observing facilities appear in today's MPEC.

Code	Observer / observatory
`B37`	Ametlla del Valles Obs. in Spain, 1 in MPEC 2008-E11 -- 137170
`H55`	Astronomical Research Obs. (ARO) in Illinois, 5 in MPEC 2008-E11 -- 2008 DY22, 2008 DX22, 2008 DV22, 2008 DG17, 2003 TM1
`B09`	Capannoli Obs. in Italy, 1 in MPEC 2008-E11 -- 22099
`703`	Catalina Sky Survey (CSS) in Arizona, 9 in MPEC 2008-E11 -- 2008 CR116, 2008 CD71, 2007 US6, 2006 DU62, 2003 AK18, 85839, 68346, 21277, 153591
`448`	Desert Moon Obs. in New Mexico, 4 in MPEC 2008-E11 -- 2008 CZ118, 2008 CB22, 2008 AM33, 2003 FH
`379`	Hamamatsu-Yuto Obs. in Japan, 6 in MPEC 2008-E11 -- 2008 CN1, 2008 CL1, 2007 VQ4, 2007 TG8, 2002 TD66, 153591
`704`	LINEAR in New Mexico, 12 in MPEC 2008-E11 -- 2008 DY22, 2008 DJ, 2008 DG17, 2008 BC22, 2008 AE, 2003 TM1, 99935, 86667, 68359, 144901, 143678, 5836
`A70`	Lumijoki Obs. in Finland, 1 in MPEC 2008-E11 -- 2007 TU24
`560`	Madonna di Dossobuono Obs. in Italy, 7 in MPEC 2008-E11 -- 2008 DJ, 2008 CN1, 2008 CL72, 2008 BT18, 2005 EK70, 2002 TD66, 1620
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 10 in MPEC 2008-E11 -- 2008 DV, 2007 YX1, 2007 DA, 1998 SJ70, 1993 TQ2, 38091, 18736, 154589, 144922, 137099
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 17 in MPEC 2008-E11 -- 2008 DJ, 2008 CN1, 2008 CL1, 2008 CB22, 2008 BT18, 2008 AF4, 2008 AE, 2007 YK, 2007 TU24, 2007 TG8, 2006 DU62, 2005 EK70, 2005 BE2, 2002 TD66, 2000 DP107, 11398, 1620
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2008-E11 -- 2003 GW
`291`	Spacewatch 1.8m telescope in Arizona, 10 in MPEC 2008-E11 -- 2008 DW, 2008 DV, 2008 DJ5, 2008 DG5, 2008 DG4, 2008 CO, 2008 CK119, 2008 CA22, 2005 GP21, 2002 AJ129
`A48`	Verona Obs. in Italy, 3 in MPEC 2008-E11 -- 2008 CL1, 2008 CD22, 153591

Impact Risk Monitoring on 2 March '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2355 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.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
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

2008 DX22	JPL Sentry	1622	R E M O V E D						JPL: Risk listing removed at 1138 UTC.

2008 DW22	NEODyS	1623	2028-2085	6	5.25e-10	-9.13	-9.45	0	NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2008/02/28.287 to 2008/03/01.397."

2008 DJ5	JPL Sentry	1623	2029-2107	74	1.7e-06	-4.01	-4.05	0	JPL: "Analysis based on 15 observations spanning 1.9550 days (2008-Feb-28.40456 to 2008-Mar-01.35952)." Diameter approximately 0.201 km. from mean, weighted H=21.2.
2008 DJ5	NEODyS	1623	2012-2072	10	5.61e-08	-5.14	-5.23	0	NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/02/28.405 to 2008/03/01.360."

2008 DG5	JPL Sentry	1623	2011-2105	45	4.0e-08	-4.37	-4.68	0	JPL: "Analysis based on 18 observations spanning 1.9681 days (2008-Feb-28.2778 to 2008-Mar-01.24587)." Diameter approximately 0.482 km. from mean, weighted H=19.2.
2008 DG5	NEODyS	1623	2028-2038	2	1.42e-09	-5.96	-6.08	0	NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2008/02/28.279 to 2008/03/01.247."

2008 AF4	JPL Sentry	1800	2078-2100	12	3.0e-05	-2.19	-2.29	1	JPL: "Analysis based on 557 observations spanning 50.910 days (2008-Jan-10.39652 to 2008-Mar-01.30627)." Diameter approximately 0.390 km. from mean, weighted H=19.7.
2008 AF4	NEODyS	1623	2078-2089	3	2.37e-05	-2.29	-2.29	1	NEODyS: "Based on 561 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/03/01.307. NOTE: The Virtual Impactor in 2089/01/09.478 in the table above is rated as Torino Scale 1."

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 2 March '08

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

1800	Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
1623	Noted that NEODyS has updated its 2008 AF4 risk assessment - see above Noted that NEODyS has updated its 2008 DG5 risk assessment - see above Noted that NEODyS has updated its 2008 DJ5 risk assessment - see above Grabbed MPEC 2008-E11 - Daily Orbit Update - see above
1622	Noted that JPL Sentry has updated its 2008 DG5 risk assessment - see above Noted that JPL Sentry has updated its 2008 DJ5 risk assessment - see above Noted that NEODyS has posted 2008 DW22 as an impact risk - see above Noted that JPL Sentry has removed 2008 DX22 as an impact risk - see above

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