2012-06-11 Tracking News

Contents on 11 June '12

Traffic Report -- three objects
Radar Astrometry -- one object
IAU Minor Planet Center
- NEOCP Activity -- 15 listings
- New MPECs -- five MPECs
Observers -- 30 observers
Impact Risk Monitoring -- one object
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page (archive)
Of 446 risk-listed objects, 16 have had news in the last 31 days. Updated at 1450 UTC on 11 June.
Ephemerides for risk-rated & nearby objects + potential mission destinations
News image catalog
News old archive & Small Objects Archive
Object Links - mainly for radar targets & close passers - updated 28 May
Observing Campaigns

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.

Traffic Report on 11 June '12

Three objects reported inside ten LD

Three visitors are reported to be within ten lunar distances (LD) of our planet today. Risk-listed 2012 LJ exits Earth's Hill sphere, moving from 1.87 to 5.41 LD. Out further, 2012 LT comes its closest to Earth on this passage, reaching 5.18 LD at 1008 UTC, and 2012 LA is outbound from 9.57 to 9.82 LD.

Coming to the neighborhood next, 2012 LU arrives inside ten LD on June 16th.

This report was generated at 1452 UTC with follow-up in today's DOU MPEC for 2012 LU, 2012 LJ, and 2012 LA.

Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) is estimated to extend out to around 3.89 LD. Object distances are interpreted by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

Radar Astrometry on 11 June '12

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:

Data update noted at 2120 UTC when the database was dated 11 June

2007 LE from Goldstone DSS-14 70m antenna (May 31.38 velocity) and Arecibo (June 2.11 range) - see links

NEOCP Activity on 11 June '12

The MPC's NEO Confirmation Page has 15 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had fifteen objects listed. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 27 listings on the NEOCP today.

New MPECs on 11 June '12

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2012-L23 time-stamped "06:02 UT" - Daily Orbit Update - see below
MPEC 2012-L24 time-stamped "10:47 UT" - 2012 LC1 - see below
MPEC 2012-L25 time-stamped "10:49 UT" - 2012 LD1 - see below
MPEC 2012-L26 time-stamped "19:25 UT" - 2012 LP1 - see below
MPEC 2012-L27 time-stamped "20:05 UT" - Comet C/2012 L3 (LINEAR)

MPEC 2012-L27 - "20:05 UT" - Comet C/2012 L3 (LINEAR)

CK12L030 C/2012 L3 (LINEAR) (i=135.6°, q=0.274 AU, TP=2012 Jan. 30.88403 TT) from LINEAR (June 10.31-35p4), the Spacewatch 1.8m telescope (June 11.30p3), ISON-NM Obs. (June 11.31-33p3 & 11.37-41p3), Wiggins Obs. (June 11.38-39p4), Erik Bryssinck via RAS Obs. Mayhill (June 11.43-44p8), Paul Roche via Faulkes Telescope North (June 11.43p4), Rolando Ligustri via RAS Obs. Mayhill (June 11.44p3), and Tomas Vorobjov via Kitt Peak Natl. Obs. (KPNO) (June 11.44-45p4)

MPEC 2012-L26 - "19:25 UT" - 2012 LP1

K12L01P 2012 LP1 (small asteroid, H=23.3 ~74m) from the Mt. Lemmon Survey (MLS) (June 10.23-26p4 & 10.30p3), Astronomical Research Obs. Westfield (June 11.18p3), and Spacewatch 1.8m (June 11.19p3)

MPEC 2012-L25 - "10:49 UT" - 2012 LD1

K12L01D 2012 LD1 (borderline-small, H=21.8 ~148m) from the Catalina Sky Survey (CSS) (June 9.37-38p3 & 9.45p4), Great Shefford Obs. (June 9.95p3), Brixiis Obs. (June 10.02-03p4), Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) (June 10.17p3), ARO Westfield (June 10.21-22p4), Sandlot Obs. (June 10.24-26p3), Bisei Spaceguard Center (June 10.61-62p4), El Catalejo Obs. (June 11.01-06p3), and Teide Obs. (June 11.03-06p3)

MPEC 2012-L24 - "10:47 UT" - 2012 LC1

K12L01C 2012 LC1 (H=16.1 ~2.04 km, q=0.469 AU) from CSS (June 8.16-22p12), Farra d'Isonzo Obs. (June 8.89p2), Siegen Obs. (June 8.90-93p6), El Catalejo Obs. (June 8.97-98p3), ARO Westfield (June 9.10-11p4), Sandlot Obs. (June 9.13p4 & 10.12-14p5), DGRO-RH (June 9.15p5), Hidetaka Sato via RAS Obs. Mayhill (June 9.15-16p6), Sabino Canyon Obs. (June 9.19p3), MLS (June 10.16-18p4), and Spacewatch 1.8m (June 11.16-17p3)

<< DOU on 11 June '12 >> MPEC 2012-L23 - "06:02 UT" - Daily Orbit Update

Observations of risk-listed objects
K12L00J 2012 LJ (small asteroid, arc=1 day, H=25.6 ~26m, close passer) from Sandlot Obs. (June 10.28-29p5) and ARO Westfield (June 10.31-34p17)
Observations of recently (no longer) risk-listed objects
K12K42U 2012 KU42 (arc=16 days, H=17.7 ~977m) from ARO Westfield (June 10.34-35p3)
Observations of close-passing objects
K12L00U 2012 LU (arc=1 day, H=24.8 ~37m) from Bisei (June 10.59-60p3)
K12L00A 2012 LA (arc=9 days, H=27.5 ~11m, PMD candidate) from ARO Westfield (June 10.22-25p3)
Observation campaigns (radar support, potential mission destinations)
K07L00E 2007 LE (arc=3 opp, H=19.7 ~389m, radar) from Kuban State Univ. Obs. (June 3.91-95p108)
-- Potential mission destinations (PMD) list & ephemerides + NHATS -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K12K11K 2012 KK11 (arc=22 days, H=25.3 ~29m) from ARO Westfield (June 10.30-32p3 at V=21.5-22.2) and Spacewatch 1.8m (June 10.40p2)
K12K00X 2012 KX (arc=25 days, H=23.4 ~71m) from ARO Westfield (June 10.33-35p4)
K12H20D 2012 HD20 (arc=47 days, H=22.0 ~135m) from Spacewatch 1.8m (June 10.31-32p3)
Observations of other asteroidal objects
K12K47F 2012 KF47 (arc=10 days, H=21.0 ~214m) from ARO Westfield (June 10.32-33p3)
K12K45M 2012 KM45 (arc=13 days, H=18.6 ~645m) from ARO Westfield (June 10.10-11p3) and Wishing Star Obs. (June 11.16-17p3)
K12K12U 2012 KU12 (arc=23 days, H=21.6 ~162m) from Spacewatch 1.8m (June 10.25-27p2 at R=22.1-2 & 11.20-23p2 at R=22.1)
K12K11L 2012 KL11 (arc=22 days, H=21.0 ~214m) from Spacewatch 1.8m (June 10.33p3)
K12K06C 2012 KC6 (arc=22 days, H=21.7 ~155m) from Pan-STARRS 1 (PS1) (June 9.34-38p3)
K12J16B 2012 JB16 (arc=27 days, H=19.7 ~389m) from MLS (June 10.20-22p4)
K12H31G 2012 HG31 (arc=57 days, H=18.8 ~589m) from CSS (June 10.29-30p3) and Wishing Star Obs. (June 11.07-08p3)
K12F62N 2012 FN62 (Q=5.265 AU, arc=103 days, H=17.7 ~977m) from Spacewatch 1.8m (June 10.22-23p3)
K12D61H 2012 DH61 (arc=104 days, H=19.1 ~513m) from CSS (June 10.18-19p4) and Wishing Star Obs. (June 11.09-10p3)
K12C21A 2012 CA21 (Q=4.402 AU, arc=118 days, H=19.1 ~513m) from PS1 (June 9.35-38p4)
K11WD4V 2011 WV134 (Q=4.676 AU, arc=3 opp, H=17.1 ~1.29 km) from Petit Jean Mtn. South Obs. (PJMSO) (June 11.19-20p6)
K11O24P 2011 OP24 (arc=2 opp, H=19.8 ~371m) from Spacewatch 1.8m (June 10.37-38p3)
K10L14J 2010 LJ14 (arc=2 opp, H=17.7 ~977m) from CSS (June 10.27-29p4)
K10D00M 2010 DM (q=0.329 AU, arc=2 opp, H=19.1 ~513m) from Spacewatch 1.8m (June 11.17-18p3)
K08M01G 2008 MG1 (q=0.139 AU, arc=2 opp, H=19.8 ~371m) from the Siding Spring Survey (SSS) (June 10.70-72p3)
K07RE6T 2007 RT146 (arc=3 opp, H=18.7 ~616m) from Spacewatch 1.8m (June 10.43-44p3)
K06V13Y 2006 VY13 (Q=4.718 AU, arc=2 opp, H=17.2 ~1.23 km) from the Spacewatch 0.9m telescope (June 10.17p1 & 10.29p1)
K04J02N 2004 JN2 (arc=3 opp, H=20.3 ~295m) from Spacewatch 1.8m (June 10.39p2)
K02RB2V 2002 RV112 (arc=5 opp, H=17.7 ~977m) from Spacewatch 1.8m (June 10.45p3)
K01R12C 2001 RC12 (Q=5.288 AU, arc=4 opp, H=15.7 ~2.45 km, q=1.161 AU) from ARO Westfield (June 10.28-31p2)
K01L00B 2001 LB (arc=2 opp, H=21.1 ~204m) from PJMSO (June 11.17-18p7)
W9275 329275 1999 VP6 from CSS (June 10.29-31p4) and Wishing Star Obs. (June 11.11p3)
O8818 248818 2006 SZ217 from Desert Moon Obs. (June 10.32-34p3)
G3732 163732 2003 KP2 from PS1 (June 9.35-38p3)
G2082 162082 1998 HL1 from Wishing Star Obs. (June 11.13-14p3)
E3637 143637 2003 LP6 from PS1 (June 9.34-38p4)
E2781 142781 2002 UM11 from Spacewatch 0.9m (June 10.42-45p3)
A0756 100756 1998 FM5 from PS1 (June 9.41-42p2 & 9.53-54p2)
85628 85628 1998 KV2 from MLS (June 10.19-21p4)
53110 53110 1999 AR7 from Desert Moon Obs. (June 10.29-30p5)
24445 24445 2000 PM8 from PS1 (June 9.52-53p2)
07092 7092 Cadmus (1992 LC) from Wishing Star Obs. (June 11.05p3)
05587 5587 1990 SB from Kuban State Univ. Obs. (June 10.86-92p33)
04341 4341 Poseidon (1987 KF) from Tenagra II Obs. (June 10.41-43p3)

Observers on 11 June '12

A total of 30 observers appear in today's MPECs.

Code	Observer / observatory
`251`	Arecibo in Puerto Rico, 1 in radar -- 2007 LE
`H21`	Astronomical Research Obs. Westfield in Illinois, 11 in MPECs 2012-L23, 2012-L24, 2012-L25 & 2012-L26 -- 2012 LP1, 2012 LJ, 2012 LD1, 2012 LC1, 2012 LA, 2012 KX, 2012 KU42, 2012 KM45, 2012 KK11, 2012 KF47, 2001 RC12
`300`	Bisei Spaceguard Center in Japan, 2 in MPECs 2012-L23 & 2012-L25 -- 2012 LU, 2012 LD1
`B96`	Brixiis Obs. in Belgium, 1 in MPEC 2012-L25 -- 2012 LD1
`703`	Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2012-L23, 2012-L24 & 2012-L25 -- 2012 LD1, 2012 LC1, 2012 HG31, 2012 DH61, 2010 LJ14, 329275
`448`	Desert Moon Obs. in New Mexico, 2 in MPEC 2012-L23 -- 53110, 248818
`G48`	Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 2 in MPECs 2012-L24 & 2012-L25 -- 2012 LD1, 2012 LC1
`I48`	El Catalejo Obs. in Argentina, 2 in MPECs 2012-L24 & 2012-L25 -- 2012 LD1, 2012 LC1
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2012-L24 -- 2012 LC1
`F657`	Paul Roche in Wales via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-L27 -- C/2012 L3
`253`	Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2007 LE
`J95`	Great Shefford Obs. in England, 1 in MPEC 2012-L25 -- 2012 LD1
`H15`	ISON-NM Obs. in New Mexico, 1 in MPEC 2012-L27 -- C/2012 L3
`695{`	Tomas Vorobjov in England via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2012-L27 -- C/2012 L3
`C40`	Kuban State Univ. Obs. in Russia, 2 in MPEC 2012-L23 -- 2007 LE, 5587
`704`	LINEAR in New Mexico, 1 in MPEC 2012-L27 -- C/2012 L3
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2012-L23, 2012-L24 & 2012-L26 -- 2012 LP1, 2012 LC1, 2012 JB16, 85628
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 6 in MPEC 2012-L23 -- 2012 KC6, 2012 CA21, 24445, 163732, 143637, 100756
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2012-L23 -- 2011 WV134, 2001 LB
`H06*`	Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-L27 -- C/2012 L3
H06`	Erik Bryssinck in Belgium via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-L27 -- C/2012 L3
`H06\|`	Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-L24 -- 2012 LC1
`854`	Sabino Canyon Obs. in Arizona, 1 in MPEC 2012-L24 -- 2012 LC1
`H36`	Sandlot Obs. in Kansas, 3 in MPECs 2012-L23, 2012-L24 & 2012-L25 -- 2012 LJ, 2012 LD1, 2012 LC1
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2012-L23 -- 2008 MG1
`510`	Siegen Obs. in Germany, 1 in MPEC 2012-L24 -- 2012 LC1
`691`	Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2012-L23 -- 2006 VY13, 142781
`291`	Spacewatch 1.8m telescope in Arizona, 13 in MPECs 2012-L23, 2012-L24, 2012-L26 & 2012-L27 -- 2012 LP1, 2012 LC1, C/2012 L3, 2012 KU12, 2012 KL11, 2012 KK11, 2012 HD20, 2012 FN62, 2011 OP24, 2010 DM, 2007 RT146, 2004 JN2, 2002 RV112
`954`	Teide Obs. in the Canary Islands, 1 in MPEC 2012-L25 -- 2012 LD1
`926`	Tenagra II Obs. in Arizona, 1 in MPEC 2012-L23 -- 4341
`718`	Wiggins Obs. in Utah, 1 in MPEC 2012-L27 -- C/2012 L3
`I15`	Wishing Star Obs. in Rhode Island, 6 in MPEC 2012-L23 -- 2012 KM45, 2012 HG31, 2012 DH61, 329275, 162082, 7092

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

Impact Risk Monitoring on 11 June '12

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2359 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. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON2 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

2012 LJ	JPL Sentry	1450	2068-2072	2	1.9e-06	-5.88	-5.88	0	JPL: "Analysis based on 46 observations spanning .93904 days (2012-Jun-09.39822 to 2012-Jun-10.337259)." Diameter approximately 0.026 km. from mean, weighted H=25.6.
2012 LJ	NEODyS	1450	2051-2072	2	3.53e-06	-5.61	-5.62	0	NEODyS: "Based on 46 optical observations (of which 3 are rejected as outliers) from 2012-06-09.399 to 2012-06-10.338."

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 11 June '12

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

2120	Grabbed MPEC 2012-L27 - Comet C/2012 L3 (LINEAR) - see above Noted Radar Astrometry database update - see above
2009	Grabbed MPEC 2012-L26 - 2012 LP1 - see above
1452	Generated Traffic Report
1450	Noted that JPL Sentry has updated its 2012 LJ risk assessment - see above Noted that NEODyS has updated its 2012 LJ risk assessment - see above Grabbed MPEC 2012-L23 - Daily Orbit Update - see above Grabbed MPEC 2012-L24 - 2012 LC1 - see above Grabbed MPEC 2012-L25 - 2012 LD1 - see above

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