2009-05-01 Tracking News

Contents on 1 May '09

IAU Minor Planet Center
- NEOCP Activity -- six listings: 1 new, 5 updated
- New MPECs -- nine MPECs
Observers -- sixteen 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 1 May '09

The MPC's NEO Confirmation Page has 6 listings: 1 new, 5 updated

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

New MPECs on 1 May '09

Minor Planet Electronic Circulars

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

MPEC 2009-J01 time-stamped "06:10 UT" - Daily Orbit Update - see below
MPEC 2009-J02 time-stamped "14:02 UT" - 1998 HN3 - see below
MPEC 2009-J03 time-stamped "16:34 UT" - 2009 HB82 - see below
MPEC 2009-J04 time-stamped "16:39 UT" - 2009 HC82 - see below
MPEC 2009-J05 time-stamped "17:08 UT" - 2009 HD82 - see below
MPEC 2009-J06 time-stamped "17:13 UT" - 2009 HE82 - see below
MPEC 2009-J07 time-stamped "17:16 UT" - 2009 HF82 - see below
MPEC 2009-J08 time-stamped "20:02 UT" - 2009 HM82 - see below
MPEC 2009-J09 time-stamped "22:36 UT" - 2009 JA

MPEC 2009-J09 - "22:36 UT" - 2009 JA

K09J00A 2009 JA (small asteroid, Earth MOID=6.7 LD, H=25.4 ~28m) was discovered at 0642 UT on 1 May by LINEAR, which observed it at May 1.28-34p5. The discovery was confirmed by Sormano Obs. (May 1.87-89p4). This object is now within ten lunar distances (LD) of Earth, reaching 7.6 LD on 5 May.

MPEC 2009-J08 - "20:02 UT" - 2009 HM82

K09H82M 2009 HM82 (borderline-small, H=22.0 ~135m) was discovered at 0711 UT on 30 April by LINEAR, which observed it at April 30.30-34p5 and May 1.34-39p8.

MPEC 2009-J07 - "17:16 UT" - 2009 HF82

K09H82F 2009 HF82 (risk-listed, H=20.4 ~282m) was discovered at 0659 UT on 30 April by the Mt. Lemmon Survey (MLS), which observed it at April 30.29-32p4 at V=21.4-22.2 and 30.37-39p3 at V=21.5. The discovery was confirmed by the Spacewatch 1.8m telescope (April 30.36-37p3 & May 1.18-19p3).

MPEC 2009-J06 - "17:13 UT" - 2009 HE82

K09H82E 2009 HE82 (H=18.5 ~676m) was discovered at 1032 UT on 29 April by MLS, which observed it at April 29.44-46p3 and 30.41-44p4. The discovery was confirmed by Desert Moon Obs. (April 30.34-36p2) and Spacewatch 1.8m (May 1.43p2).

MPEC 2009-J05 - "17:08 UT" - 2009 HD82

K09H82D 2009 HD82 (H=21.4 ~178m) was discovered at 0859 UT on 29 April by the Spacewatch 0.9m telescope, which observed it at April 24.32-36p3 and 29.37-41p3. The discovery was confirmed by Spacewatch 1.8m (April 29.45p3 & 30.30-31p3).

MPEC 2009-J04 - "16:39 UT" - 2009 HC82

K09H82C 2009 HC82 (i=154.6°, Q=4.110 AU, Earth MOID=9.1 LD, H=16.2 ~1.95 km) was discovered at 0858 UT on 29 April by the Catalina Sky Survey (CSS), which observed it at April 29.37-44p8. The discovery was confirmed by MLS (April 30.32-35p4), Naef Obs. (April 30.93-95p2), Sabino Canyon Obs. (May 1.33-34p3), and Spacewatch 1.8m (May 1.38-39p3).

MPEC 2009-J03 - "16:34 UT" - 2009 HB82

K09H82B 2009 HB82 (Q=4.560 AU, H=17.8 ~933m) was discovered at 1824 UT on 23 April by the Siding Spring Survey (SSS), which observed it at April 23.77-81p6, 25.70-71p2, 26.76p1, 26.82p1, 29.82p1, and 30.81p1.

MPEC 2009-J02 - "14:02 UT" - 1998 HN3

J98H03N 1998 HN3 (Q=5.031 AU, H=18.3 ~741m) from MLS (April 30.25-29p4, 30.33-35p3 & May 1.28-31p4), Saint-Barthelemy Obs. (April 30.93-95p3), and Spacewatch 1.8m (May 1.31-32p3)

<< DOU on 1 May '09 >> MPEC 2009-J01 - "06:10 UT" - Daily Orbit Update

Observations of risk-listed objects
K09H73M 2009 HM73 (small asteroid, arc=3 days, H=23.0 ~85m) from Spacewatch 1.8m (May 1.17-18p3)
K09H67W 2009 HW67 (small asteroid, arc=4 days, H=26.1 ~20m) from Spacewatch 1.8m (May 1.20-21p3)
K09H58V 2009 HV58 (i=53.5°, arc=5 days, H=19.2 ~490m) from Spacewatch 1.8m (April 30.32-33p3)
K09H00C 2009 HC (small asteroid, arc=13 days, H=24.8 ~37m) from Spacewatch 1.8m (April 30.20p3)
Observations of recently (no longer) risk-listed objects
K09H21L 2009 HL21 (small asteroid, arc=9 days, H=22.5 ~107m) from LINEAR (April 30.25-29p5)
Observations of small asteroids (H>22.0)
K09H44U 2009 HU44 (q=0.295 AU, arc=8 days, H=22.6 ~102m) from LINEAR (April 30.25-29p5)
K09H21H 2009 HH21 (arc=7 days, H=26.9 ~14m) from Spacewatch 1.8m (April 28.44p2)
K09H00D 2009 HD (arc=8 days, H=22.7 ~98m) from Verona Obs. (April 24.93p3)
Observations of other objects
K09H67Z 2009 HZ67 (arc=3 days, H=21.2 ~195m) from Engelhardt Obs. Zelenchukskaya Station (April 30.95-97p3)
K09H67Y 2009 HY67 (i=36.6°, arc=3 days, H=21.7 ~155m) from Spacewatch 0.9m (April 30.32-34p2)
K09H44V 2009 HV44 (i=37.7°, arc=9 days, H=19.0 ~537m) from Hamamatsu-Yuto Obs. (April 30.71-72p3) and Skylive Obs. (May 1.09-10p3)
K09H02V 2009 HV2 (arc=11 days, H=21.3 ~186m) from MLS (April 30.21-24p4)
K09F25L 2009 FL25 (arc=37 days, H=19.4 ~446m) from Desert Moon Obs. (April 30.13-21p3)
K09D47E 2009 DE47 (arc=61 days, H=18.7 ~616m) from CSS (April 30.27-28p3)
K09D46L 2009 DL46 (arc=61 days, H=21.6 ~162m) from Spacewatch 0.9m (April 30.47p2)
K09C03B 2009 CB3 (q=0.294 AU, arc=85 days, H=19.5 ~426m) from Spacewatch 1.8m (April 30.25-26p3 at V=21.9-22.1)
K09C01Q 2009 CQ1 (arc=101 days, H=20.7 ~245m) from Verona Obs. (April 30.86-87p4) and Bigmuskie Obs. (April 30.87-89p3)
K08W60L 2008 WL60 (arc=158 days, H=18.0 ~851m) from Hamamatsu-Yuto Obs. (April 30.54-57p4) and Verona Obs. (April 30.92-93p4)
K08W02N 2008 WN2 (arc=189 days, H=20.8 ~234m) from Bigmuskie Obs. (April 30.93-96p3)
K07B02T 2007 BT2 (arc=3 opp, H=17.1 ~1.29 km) from Hamamatsu-Yuto Obs. (April 30.48-52p6) and Verona Obs. (April 30.89-90p4)
K05S71A 2005 SA71 (arc=3 opp, H=18.7 ~616m) from LINEAR (April 30.26-28p3)
K05R33N 2005 RN33 (arc=2 opp, H=19.6 ~407m) from Spacewatch 1.8m (April 29.33-34p2 & 30.34-35p3)
K04C00L 2004 CL (arc=4 opp, H=20.6 ~257m) from Spacewatch 1.8m (April 30.38-40p3 at V=22.4)
K02L00V 2002 LV (arc=3 opp, H=16.5 ~1.70 km) from Desert Moon Obs. (April 30.40-43p3)
J90U00A 1990 UA (arc=3 opp, H=19.7 ~389m) from Spacewatch 1.8m (May 1.14-15p3)
H5706 175706 1996 FG3 from LINEAR (April 30.14-18p5)
G2900 162900 2001 HG31 from CSS (April 30.19-21p4)
G2181 162181 1999 LF6 from LINEAR (April 30.37-39p3)
E2781 142781 2002 UM11 from CSS (April 30.36-38p3)
99799 99799 2002 LJ3 from Spacewatch 0.9m (April 30.37-41p3)
86666 86666 2000 FL10 from MLS (April 30.38-41p4)
85953 85953 1999 FK21 from MLS (April 30.14-17p4)
85867 85867 1999 BY9 from LINEAR (April 30.20-24p4)
85774 85774 1998 UT18 from Spacewatch 0.9m (April 30.23-26p3) and LINEAR (April 30.30-34p5)
39557 39557 Gielgud (1992 JG) from LINEAR (April 30.25-29p5)
27346 27346 2000 DN8 from Spacewatch 0.9m (April 30.44-46p2)
25916 25916 2001 CP44 from CSS (April 30.19-22p3)
12711 12711 Tukmit (1991 BB) from SSS (April 30.36-38p4)
00719 719 Albert (1911 MT) from MLS (April 30.25-28p3)
00433 433 Eros (1898 DQ) from SSS (April 30.77-79p4)

Observers on 1 May '09

Sixteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`B88`	Bigmuskie Obs. in Italy, 2 in MPEC 2009-J01 -- 2009 CQ1, 2008 WN2
`703`	Catalina Sky Survey (CSS) in Arizona, 5 in MPECs 2009-J01 & 2009-J04 -- 2009 HC82, 2009 DE47, 25916, 162900, 142781
`448`	Desert Moon Obs. in New Mexico, 3 in MPECs 2009-J01 & 2009-J06 -- 2009 HE82, 2009 FL25, 2002 LV
`114`	Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2009-J01 -- 2009 HZ67
`379`	Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2009-J01 -- 2009 HV44, 2008 WL60, 2007 BT2
`704`	LINEAR in New Mexico, 10 in MPECs 2009-J01, 2009-J08 & 2009-J09 -- 2009 JA, 2009 HU44, 2009 HM82, 2009 HL21, 2005 SA71, 85867, 85774, 39557, 175706, 162181
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2009-J01, 2009-J02, 2009-J04, 2009-J06 & 2009-J07 -- 2009 HV2, 2009 HF82, 2009 HE82, 2009 HC82, 1998 HN3, 86666, 85953, 719
`A13`	Naef Obs. in Switzerland, 1 in MPEC 2009-J04 -- 2009 HC82
`854`	Sabino Canyon Obs. in Arizona, 1 in MPEC 2009-J04 -- 2009 HC82
`B04`	Saint-Barthelemy Obs. in Italy, 1 in MPEC 2009-J02 -- 1998 HN3
`E12`	Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2009-J01 & 2009-J03 -- 2009 HB82, 12711, 433
`B40`	Skylive Obs. in Italy, 1 in MPEC 2009-J01 -- 2009 HV44
`587`	Sormano Obs. in Italy, 1 in MPEC 2009-J09 -- 2009 JA
`691`	Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2009-J01 & 2009-J05 -- 2009 HY67, 2009 HD82, 2009 DL46, 99799, 85774, 27346
`291`	Spacewatch 1.8m telescope in Arizona, 14 in MPECs 2009-J01, 2009-J02, 2009-J04, 2009-J05, 2009-J06 & 2009-J07 -- 2009 HW67, 2009 HV58, 2009 HM73, 2009 HH21, 2009 HF82, 2009 HE82, 2009 HD82, 2009 HC82, 2009 HC, 2009 CB3, 2005 RN33, 2004 CL, 1998 HN3, 1990 UA
`A48`	Verona Obs. in Italy, 4 in MPEC 2009-J01 -- 2009 HD, 2009 CQ1, 2008 WL60, 2007 BT2

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

Impact Risk Monitoring on 1 May '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 HF82	JPL Sentry	1852	2020-2107	7	5.1e-09	-5.93	-6.19	0	JPL: "Analysis based on 13 observations spanning .90132 days (2009-Apr-30.2914 to 2009-May-01.19272)." Diameter approximately 0.230 km. from mean, weighted H=20.8.

2009 HM73	JPL Sentry	1337	R E M O V E D						JPL: Risk listing removed at 0849 UTC.
2009 HM73	NEODyS	1337	R E M O V E D						-

2009 HW67	JPL Sentry	1337	2046-2079	3	1.2e-06	-6.19	-6.52	0	JPL: "Analysis based on 29 observations spanning 3.9159 days (2009-Apr-27.29601 to 2009-May-01.21192)." Diameter approximately 0.020 km. from mean, weighted H=26.1.
2009 HW67	NEODyS	1337	2046-2079	8	1.46e-06	-6.10	-6.45	0	NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2009/04/27.297 to 2009/05/01.213."

2009 HV58	JPL Sentry	1337	2011-2108	43	8.3e-08	-3.23	-3.39	0	JPL: "Analysis based on 26 observations spanning 4.9324 days (2009-Apr-25.39439 to 2009-Apr-30.32682)." Diameter approximately 0.438 km. from mean, weighted H=19.4.
2009 HV58	NEODyS	1337	2011-2090	33	5.56e-08	-3.28	-3.41	0	NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2009/04/25.395 to 2009/04/30.328."

2009 HC	JPL Sentry	1337	2097-2099	5	1.1e-06	-6.35	-6.88	0	JPL: "Analysis based on 102 observations spanning 12.972 days (2009-Apr-17.23164 to 2009-Apr-30.20345)." Diameter approximately 0.036 km. from mean, weighted H=24.9.

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 1 May '09

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

2243	Grabbed MPEC 2009-J09 - 2009 JA - see above
2018	Grabbed MPEC 2009-J08 - 2009 HM82 - see above
1852	Noted that JPL Sentry has posted 2009 HF82 as an impact risk - see above
1736	Grabbed MPEC 2009-J05 - 2009 HD82 - see above Grabbed MPEC 2009-J06 - 2009 HE82 - see above Grabbed MPEC 2009-J07 - 2009 HF82 - see above
1700	Grabbed MPEC 2009-J03 - 2009 HB82 - see above Grabbed MPEC 2009-J04 - 2009 HC82 - see above
1432	Grabbed MPEC 2009-J02 - 1998 HN3 - see above
1337	Noted that JPL Sentry has updated its 2009 HC risk assessment - see above Noted that JPL Sentry has removed 2009 HM73 as an impact risk - see above Noted that NEODyS has removed 2009 HM73 as an impact risk - see above Noted that JPL Sentry has updated its 2009 HV58 risk assessment - see above Noted that NEODyS has updated its 2009 HV58 risk assessment - see above Noted that JPL Sentry has updated its 2009 HW67 risk assessment - see above Noted that NEODyS has updated its 2009 HW67 risk assessment - see above Grabbed MPEC 2009-J01 - Daily Orbit Update - see above

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