2009-05-31 Tracking News

Contents on 31 May '09

IAU Minor Planet Center
- NEOCP Activity -- five listings: 2 new, 3 updated
- New MPECs -- two MPECs
Observers -- sixteen observing facilities
Impact Risk Monitoring -- three objects
Chronology

Note: These A/CC news pages will probably not update again until after midnight UTC today, Sunday, May 31st.

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 31 May '09

The MPC's NEO Confirmation Page has 5 listings: 2 new, 3 updated

When last checked at 2146 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and three updated listings. Of these, one was a "one nighter." So far The Tracking News has counted a total of eleven 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 31 May '09

Minor Planet Electronic Circulars

As of last check at 2146 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-K77 time-stamped "06:09 UT" - Daily Orbit Update - see below
MPEC 2009-K78 time-stamped "20:16 UT" - 2009 KR21

MPEC 2009-K78 - "20:16 UT" - 2009 KR21

K09K21R 2009 KR21 (small asteroid, Earth MOID=0.5 LD, H=26.4 ~18m) was discovered at 0534 UT on 31 May by the Catalina Sky Survey (CSS), which observed it at May 31.23-32p12. This object is now within ten lunar distances (LD) of Earth, reaching 0.8 LD on 1 June (INTRUDER).

<< DOU on 31 May '09 >> MPEC 2009-K77 - "06:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K09K04N 2009 KN4 (arc=6 days, H=18.2 ~776m) from Shenton Park Obs. (May 29.73-74p3)
K09K02L 2009 KL2 (arc=11 days, H=17.7 ~977m) from Great Shefford Obs. (May 30.99p3)
Observations of recently (no longer) risk-listed objects
K09K04Q 2009 KQ4 (arc=150 days, H=20.4 ~282m) from CSS (2008 Dec. 30.37-38p4 & Jan. 30.20-23p3)
K09K00N 2009 KN (i=62.6°, Q=4.927 AU, arc=13 days, H=20.4 ~282m) from the Spacewatch 1.8m telescope (May 30.29-30p3 at V=21.5-22.4)
K09H73M 2009 HM73 (small asteroid, arc=32 days, H=23.1 ~81m) from the Spacewatch 0.9m telescope (May 29.32-35p3) and Spacewatch 1.8m (May 30.27-28p3)
Observations of small asteroids (H>22.0)
K09K08L 2009 KL8 (arc=1 day, H=24.1 ~51m) from Great Shefford Obs. (May 31.03p3 & 31.09-10p3)
K09K04O 2009 KO4 (arc=7 days, H=24.4 ~45m) from Great Shefford Obs. (May 30.07p1 & 31.01-02p2) and Spacewatch 0.9m (May 30.26-28p2)
K09H21L 2009 HL21 (arc=39 days, H=22.5 ~107m) from Spacewatch 1.8m (May 30.19p2 & 30.26p1)
K09H00G 2009 HG (arc=43 days, H=24.5 ~43m) from Petit Jean Mtn. South Obs. (PJMSO) (May 30.36-37p6)
K07D00D 2007 DD (arc=3 opp, H=25.8 ~23m) from David Tholen's team on Mauna Kea (April 23.38p1 at R=22.2)
Observations of other objects
K09K07C 2009 KC7 (Q=4.294 AU, arc=2 days, H=19.0 ~537m) from Shenton Park Obs. (May 29.88p3)
K09K05E 2009 KE5 (arc=4 days, H=19.5 ~426m) from Spacewatch 0.9m (May 30.38-41p3)
K09J05R 2009 JR5 (arc=15 days, H=20.3 ~295m) from Spacewatch 1.8m (May 30.31-32p3) and Spacewatch 0.9m (May 30.32-36p3)
K09J02M 2009 JM2 (arc=19 days, H=19.4 ~446m) from PJMSO (May 30.28-29p8) and Atlante Obs. (May 30.00-01p3)
K09J01K 2009 JK1 (arc=72 days, H=19.9 ~355m) from PJMSO (May 30.30-32p6) and CSS (May 30.36-38p4)
K09H88F 2009 HF88 (arc=30 days, H=19.5 ~426m) from Spacewatch 0.9m (May 29.38-42p3) and Spacewatch 1.8m (May 30.35-36p3)
K09H51Y 2009 HY51 (arc=37 days, H=20.7 ~245m) from Spacewatch 1.8m (May 30.17-18p3 at V=21.5-22.2)
K09H44W 2009 HW44 (i=41.1°, Q=4.284 AU, arc=38 days, H=17.5 ~1.07 km) from Spacewatch 1.8m (May 30.16-17p3)
K09E02Q 2009 EQ2 (arc=84 days, H=20.7 ~245m) from PJMSO (May 30.29-30p6)
K09D01F 2009 DF1 (arc=100 days, H=20.5 ~269m) from Spacewatch 0.9m (May 30.37-41p3)
K09C04R 2009 CR4 (arc=106 days, H=21.7 ~155m) from Shenton Park Obs. (May 29.67-68p2)
K09B02L 2009 BL2 (arc=132 days, H=19.3 ~467m) from CSS (May 30.20-21p3)
K08SO5X 2008 SX245 (arc=2 opp, H=17.7 ~977m) from LINEAR (2008 Nov. 19.20-25p5)
K08M01R 2008 MR1 (arc=3 opp, H=18.4 ~708m) from LINEAR (2008 Dec. 7.19-24p4)
K08J19V 2008 JV19 (arc=2 opp, H=20.7 ~245m) from CSS (May 30.33-35p7)
K07VD7W 2007 VW137 (arc=2 opp, H=18.1 ~812m) from LINEAR (2007 Dec. 31.14-18p3)
K05M13O 2005 MO13 (arc=2 opp, H=20.7 ~245m) from PJMSO (May 30.35-36p6)
K04L02C 2004 LC2 (arc=2 opp, H=18.7 ~616m) from Spacewatch 1.8m (May 30.37-38p3)
K04A01R 2004 AR1 (arc=3 opp, H=19.8 ~371m) from LINEAR (2008 Feb. 13.19p1)
K03H02F 2003 HF2 (q=0.361 AU, arc=5 opp, H=19.6 ~407m) from the Mt. Lemmon Survey (MLS) (May 30.24-26p3)
J98S15C 1998 SC15 (arc=6 opp, H=19.4 ~446m) from Wildberg Obs. (May 30.94-95p5)
J8752 198752 2005 EA60 from LINEAR (2008 Dec. 31.39-44p4)
I9973 189973 2003 XE11 from LINEAR (2008 Sept. 7.13-17p4)
I5851 185851 2000 DP107 from LINEAR (2008 May 5.15-19p5)
I4266 184266 2004 VW14 from LINEAR (2007 Dec. 4.13-18p3)
G4202 164202 2004 EW from LINEAR (2008 March 15.39-41p3)
G3760 163760 2003 OR14 from LINEAR (2007 Nov. 8.09-12p2)
G3051 163051 2001 YJ4 from CSS (May 30.44-45p4)
F9399 159399 1998 UL1 from LINEAR (May 30.30-32p3) and Atlante Obs. (May 31.09-10p3)
F4244 154244 2002 KL6 from Iluro Obs. (May 31.08-10p3)
F3311 153311 2001 MG1 from Spacewatch 0.9m (May 30.43-46p3)
E2040 142040 2002 QE15 from LINEAR (2008 May 28.22-26p3)
D8883 138883 2000 YL29 from Atlante Obs. (May 31.06-07p3)
D8205 138205 2000 EZ148 from LINEAR (2008 May 28.16-20p4)
D6617 136617 1994 CC from LINEAR (2007 Dec. 10.22p1 & 2007 Dec. 14.19-23p3)
99799 99799 2002 LJ3 from Spacewatch 0.9m (May 30.38-42p3)
96744 96744 1999 OW3 from LINEAR (2008 Aug. 4.39-44p5)
90367 90367 2003 LC5 from Zonalunar Obs. (May 27.88p1)
85989 85989 1999 JD6 from An Carraig Obs. (May 29.97-98p4)
85867 85867 1999 BY9 from LINEAR (2008 Dec. 29.39-44p4)
24445 24445 2000 PM8 from LINEAR (2008 April 13.29-34p3)
15745 15745 1991 PM5 from Iluro Obs. (May 31.05p3)
06456 6456 Golombek (1992 OM) from LINEAR (2008 May 13.16-20p4)
05869 5869 Tanith (1988 VN4) from MLS (May 30.34-37p4)
05751 5751 Zao (1992 AC) from LINEAR (2008 Aug. 3.21-26p5)
05646 5646 1990 TR from LINEAR (2008 March 5.39-43p4)
05620 5620 Jasonwheeler (1990 OA) from Iluro Obs. (May 28.96p3) and Linceo Obs. (May 29.98-99p3)
05143 5143 Heracles (1991 VL) from LINEAR (2007 Nov. 7.07-12p5)
04954 4954 Eric (1990 SQ) from the Siding Spring Survey (SSS) (May 30.51-54p4)
04486 4486 Mithra (1987 SB) from LINEAR (2007 Nov. 14.25p1)
03103 3103 Eger (1982 BB) from CSS (May 30.19-20p4)
01943 1943 Anteros (1973 EC) from CSS (May 30.44-45p4)
01866 1866 Sisyphus (1972 XA) from LINEAR (2008 May 27.21-25p5)

Observers on 31 May '09

Sixteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`J16`	An Carraig Obs. in Northern Ireland, 1 in MPEC 2009-K77 -- 85989
`J51`	Atlante Obs. in the Canary Islands, 3 in MPEC 2009-K77 -- 2009 JM2, 159399, 138883
`703`	Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2009-K77 & 2009-K78 -- 2009 KR21, 2009 KQ4, 2009 JK1, 2009 BL2, 2008 JV19, 163051, 3103, 1943
`J95`	Great Shefford Obs. in England, 3 in MPEC 2009-K77 -- 2009 KO4, 2009 KL8, 2009 KL2
`B19`	Iluro Obs. in Spain, 3 in MPEC 2009-K77 -- 15745, 154244, 5620
`704`	LINEAR in New Mexico, 23 in MPEC 2009-K77 -- 2008 SX245, 2008 MR1, 2007 VW137, 2004 AR1, 96744, 85867, 24445, 198752, 189973, 185851, 184266, 164202, 163760, 159399, 142040, 138205, 136617, 6456, 5751, 5646, 5143, 4486, 1866
`J59`	Linceo Obs. in Spain, 1 in MPEC 2009-K77 -- 5620
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2009-K77 -- 2007 DD
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2009-K77 -- 2003 HF2, 5869
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2009-K77 -- 2009 JM2, 2009 JK1, 2009 HG, 2009 EQ2, 2005 MO13
`D21`	Shenton Park Obs. in Western Australia, 3 in MPEC 2009-K77 -- 2009 KN4, 2009 KC7, 2009 CR4
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2009-K77 -- 4954
`691`	Spacewatch 0.9m telescope in Arizona, 8 in MPEC 2009-K77 -- 2009 KO4, 2009 KE5, 2009 JR5, 2009 HM73, 2009 HF88, 2009 DF1, 99799, 153311
`291`	Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2009-K77 -- 2009 KN, 2009 JR5, 2009 HY51, 2009 HW44, 2009 HM73, 2009 HL21, 2009 HF88, 2004 LC2
`198`	Wildberg Obs. in Germany, 1 in MPEC 2009-K77 -- 1998 SC15
`J08`	Zonalunar Obs. in Spain, 1 in MPEC 2009-K77 -- 90367

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

Impact Risk Monitoring on 31 May '09

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2146 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 KK8	NEODyS	1512	2017-2073	2	2.77e-08	-4.47	-4.67	0	NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2009/05/28.435 to 2009/05/30.460."

2009 KN4	JPL Sentry	1512	2077-2092	7	2.0e-07	-3.59	-3.72	0	JPL: "Analysis based on 23 observations spanning 5.9567 days (2009-May-23.78358 to 2009-May-29.74028)." Diameter approximately 0.799 km. from mean, weighted H=18.2.
2009 KN4	NEODyS	1512	2077-2088	6	1.52e-07	-3.71	-3.82	0	NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2009/05/23.784 to 2009/05/29.741."

2009 KL2	JPL Sentry	1512	2016-2108	60	2.3e-08	-4.24	-4.55	0	JPL: "Analysis based on 16 observations spanning .94458 days (2009-May-30.0495 to 2009-May-30.99408)." Diameter approximately 0.786 km. from mean, weighted H=18.2.

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 31 May '09

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

2032	Grabbed MPEC 2009-K78 - 2009 KR21 - see above
1512	Noted that NEODyS has posted 2009 KK8 as an impact risk - see above Noted that JPL Sentry has posted 2009 KL2 as an impact risk - see above Noted that JPL Sentry has updated its 2009 KN4 risk assessment - see above Noted that NEODyS has updated its 2009 KN4 risk assessment - see above Grabbed MPEC 2009-K77 - Daily Orbit Update - see above

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