2009-06-25 Tracking News

Contents on 25 June '09

IAU Minor Planet Center
- NEOCP Activity -- three listings: 1 new, 2 updated
- New MPECs -- three MPECs
Observers -- sixteen 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
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 25 June '09

The MPC's NEO Confirmation Page has 3 listings: 1 new, 2 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and two updated listings. All of these were "one nighters." So far The Tracking News has counted a total of four listings on the NEOCP at some point today.

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 25 June '09

Minor Planet Electronic Circulars

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

MPEC 2009-M35 time-stamped "06:07 UT" - Daily Orbit Update - see below
MPEC 2009-M36 time-stamped "15:05 UT" - 2009 MX6 - see below
MPEC 2009-M37 time-stamped "22:22 UT" - Comets C/2009 B6, 2009 B7, 2009 C1, 2009 C2 (STEREO)

MPEC 2009-M37 - "22:22 UT" - Comets C/2009 B6, 2009 B7, 2009 C1, 2009 C2 (STEREO)

CK09C020 C/2009 C2 from the HI1-A instrument (4) aboard STEREO-A (Feb. 11.82-88p6 & 11.93-35p32)
CK09C010 C/2009 C1 from STEREO-A/HI1-A (4) (Feb. 10.04-18p12)
CK09B070 C/2009 B7 from STEREO-A/HI1-A (4) (Jan. 29.74-82p8 & 29.88-99p10)
CK09B060 C/2009 B6 from STEREO-A/HI1-A (4) (Jan. 19.68-79p10, 19.85p2 & 20.04-07p4)

MPEC 2009-M36 - "15:05 UT" - 2009 MX6

K09M06X 2009 MX6 was discovered at 1243 UT on 24 June by the Siding Spring Survey (SSS), which observed it at June 24.53-56p4, 24.64-68p4, 25.43-44p2, and 25.57p2. The discovery was confirmed by CEAMIG-REA (June 25.05-06p3) and Cordell-Lorenz Obs. (June 25.13-16p3).

<< DOU on 25 June '09 >> MPEC 2009-M35 - "06:07 UT" - Daily Orbit Update

Observations of risk-listed objects
K09M01G 2009 MG1 (small asteroid, arc=3 days, H=24.0 ~54m) from Astronomical Research Obs. (ARO) (June 24.17-18p3)
K09M00U 2009 MU (small asteroid, arc=5 days, H=24.6 ~41m) from ARO (June 24.12-13p3)
K09M00S 2009 MS (i=53.7°, arc=5 days, H=16.0 ~2.14 km, q=0.863 AU) from ARO (June 24.19-21p3) and the Spacewatch 1.8m telescope (June 24.25-26p3)
Observations of recently (no longer) risk-listed objects
K09L02W 2009 LW2 (arc=9 days, H=19.8 ~371m) from Spacewatch 1.8m (June 24.37p2)
K09L00X 2009 LX (Q=4.536 AU, arc=13 days, H=19.5 ~426m) from SSS (June 24.63p2)
K09K21T 2009 KT21 (arc=26 days, H=19.7 ~389m) from Spacewatch 1.8m (June 24.23-25p3)
K09K08K 2009 KK8 (arc=27 days, H=19.0 ~537m) from ARO (June 24.34-36p3) and the Mt. Lemmon Survey (MLS) (June 24.44-45p3)
K09K05D 2009 KD5 (arc=29 days, H=18.3 ~741m) from ARO (June 24.36-37p7) and the Catalina Sky Survey (CSS) (June 24.42-44p4)
K09K04N 2009 KN4 (arc=32 days, H=18.3 ~741m) from El Condor Obs. (June 24.24-26p3) and SSS (June 24.64p2)
K09K03E 2009 KE3 (Q=4.541 AU, arc=32 days, H=18.2 ~776m) from SSS (June 24.79p2)
K09K03C 2009 KC3 (Q=5.454 AU, arc=51 days, H=17.9 ~891m) from SSS (June 24.50p2)
K09K02L 2009 KL2 (arc=36 days, H=18.1 ~812m) from Skylive Obs. (June 25.03p2)
Observations of other objects
K09M01M 2009 MM1 (arc=1 day, H=21.7 ~155m) from SSS (June 24.76-78p2)
K09M00W 2009 MW (arc=3 days, H=20.7 ~245m) from CSS (June 24.24-26p4)
K09M00A 2009 MA (arc=8 days, H=21.5 ~170m) from ARO (June 24.21-22p8)
K09K22J 2009 KJ22 (arc=25 days, H=20.0 ~339m) from the Spacewatch 0.9m telescope (June 22.34-38p3), ARO (June 24.26-27p5), and Naef Obs. (June 24.94-99p3)
K09K07C 2009 KC7 (Q=4.054 AU, arc=28 days, H=19.3 ~467m) from ARO (June 24.25-26p3)
K09K02V 2009 KV2 (arc=35 days, H=19.9 ~355m) from ARO (June 24.15-18p3)
K09H77V 2009 HV77 (arc=65 days, H=20.8 ~234m) from ARO (June 24.10-11p3)
K09F28N 2009 FN28 (Q=4.001 AU, arc=92 days, H=19.3 ~467m) from ARO (June 24.23-24p2)
K09A00S 2009 AS (arc=174 days, H=18.2 ~776m) from MLS (June 22.39-45p6 & 24.33-36p4), Farpoint Obs. (June 23.32-33p2), ARO (June 24.29-33p3), and Spacewatch 1.8m (June 24.40-43p3)
K04M02W 2004 MW2 (arc=2 opp, H=19.2 ~490m) from SSS (June 24.66-67p3)
K04L02C 2004 LC2 (arc=2 opp, H=18.7 ~616m) from CSS (June 24.24-26p4)
K04H01M 2004 HM1 (Q=4.235 AU, arc=5 opp, H=16.6 ~1.62 km) from MLS (June 24.44-45p4)
K02L38T 2002 LT38 (arc=2 opp, H=20.3 ~295m) from CSS (June 24.22-24p4)
K02L00V 2002 LV (arc=3 opp, H=16.6 ~1.62 km) from Capannoli Obs. (June 24.89-90p4), Naef Obs. (June 24.89-92p2), and Skylive Obs. (June 24.99p3)
K01F90E 2001 FE90 (arc=2 opp, H=20.4 ~282m) from Mandi Obs. (June 24.87-88p4)
L4088 214088 2004 JN13 from CSS (June 24.27-29p4)
K7945 207945 1991 JW from Boambee Obs. (June 23.33-34p2)
G2900 162900 2001 HG31 from MLS (June 24.16-17p4)
E3651 143651 2003 QO104 from Boambee Obs. (June 23.34-35p2)
A8519 108519 2001 LF from Boambee Obs. (June 23.34-37p3)
39557 39557 Gielgud (1992 JG) from CSS (June 24.22-24p4)
09950 9950 ESA (1990 VB) from SSS (June 24.53-56p4)
05693 5693 1993 EA from CSS (June 24.18-19p4)
04954 4954 Eric (1990 SQ) from Boambee Obs. (June 23.34-35p2)
03552 3552 Don Quixote (1983 SA) from Boambee Obs. (June 23.33-35p3)
00433 433 Eros (1898 DQ) from CSS (June 24.42-44p4)

Observers on 25 June '09

Sixteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 12 in MPEC 2009-M35 -- 2009 MU, 2009 MS, 2009 MG1, 2009 MA, 2009 KV2, 2009 KK8, 2009 KJ22, 2009 KD5, 2009 KC7, 2009 HV77, 2009 FN28, 2009 AS
`432`	Boambee Obs. in New South Wales, 5 in MPEC 2009-M35 -- 207945, 143651, 108519, 4954, 3552
`I77`	CEAMIG-REA in Brazil, 1 in MPEC 2009-M36 -- 2009 MX6
`B09`	Capannoli Obs. in Italy, 1 in MPEC 2009-M35 -- 2002 LV
`703`	Catalina Sky Survey (CSS) in Arizona, 8 in MPEC 2009-M35 -- 2009 MW, 2009 KD5, 2004 LC2, 2002 LT38, 39557, 214088, 5693, 433
`850`	Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2009-M36 -- 2009 MX6
`I21`	El Condor Obs. in Argentina, 1 in MPEC 2009-M35 -- 2009 KN4
`734`	Farpoint Obs. in Kansas, 1 in MPEC 2009-M35 -- 2009 AS
`B28`	Mandi Obs. in Italy, 1 in MPEC 2009-M35 -- 2001 FE90
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 4 in MPEC 2009-M35 -- 2009 KK8, 2009 AS, 2004 HM1, 162900
`A13`	Naef Obs. in Switzerland, 2 in MPEC 2009-M35 -- 2009 KJ22, 2002 LV
`C494`	HI1-A instrument (4) aboard STEREO-A in heliocentric orbit leading Earth, 4 in MPEC 2009-M37 -- C/2009 C2, C/2009 C1, C/2009 B7, C/2009 B6
`E12`	Siding Spring Survey (SSS) in New South Wales, 8 in MPECs 2009-M35 & 2009-M36 -- 2009 MX6, 2009 MM1, 2009 LX, 2009 KN4, 2009 KE3, 2009 KC3, 2004 MW2, 9950
`B40`	Skylive Obs. in Italy, 2 in MPEC 2009-M35 -- 2009 KL2, 2002 LV
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2009-M35 -- 2009 KJ22
`291`	Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2009-M35 -- 2009 MS, 2009 LW2, 2009 KT21, 2009 AS

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

Impact Risk Monitoring on 25 June '09

**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 MG1	JPL Sentry	1734	2079-2083	3	3.7e-07	-5.96	-6.21	0	JPL: "Analysis based on 18 observations spanning 2.9300 days (2009-Jun-21.27223 to 2009-Jun-24.20218)." Diameter approximately 0.053 km. from mean, weighted H=24.0.
2009 MG1	NEODyS	1734	2079-2083	3	3.38e-07	-5.99	-6.23	0	NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2009/06/21.273 to 2009/06/24.203."

2009 MU	JPL Sentry	1734	2096	1	2.5e-07	-6.58	-6.58	0	JPL: "Analysis based on 88 observations spanning 4.8184 days (2009-Jun-19.30659 to 2009-Jun-24.12497)." Diameter approximately 0.042 km. from mean, weighted H=24.5.

2009 MS	JPL Sentry	1734	R E M O V E D						JPL: Risk listing removed at 1650 UTC.

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 25 June '09

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

2309	Grabbed MPEC 2009-M37 - Comets C/2009 B6, 2009 B7, 2009 C1, 2009 C2 (STEREO) - see above
1734	Noted that JPL Sentry has updated its 2009 MG1 risk assessment - see above Noted that NEODyS has updated its 2009 MG1 risk assessment - see above Noted that JPL Sentry has removed 2009 MS as an impact risk - see above Noted that JPL Sentry has updated its 2009 MU risk assessment - see above
1600	Grabbed MPEC 2009-M35 - Daily Orbit Update - see above Grabbed MPEC 2009-M36 - 2009 MX6 - see above

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