Contents on 16 June '12
- Traffic Report -- three objects
- IAU Minor Planet Center
- NEOCP Activity -- 48 listings
- New MPECs -- four MPECs
- Observers -- 38 observers
- Impact Risk Monitoring -- two objects
- Chronology
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
- 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 15 June 3x
- 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 16 June '12
Three objects reported inside ten LD
Three visitors are reported to be within ten lunar distances (LD) of our planet today. Newly announced 2012 LA11 is outbound from 6.55 to 7.30 LD. 2012 LT leaves ten LD, moving from 9.80 to 11.37 LD. And 2012 LU comes inside ten LD, passing from 10.94 to 9.89 LD. No other objects are known to be approaching this close until November.
This report was updated at 2350 UTC with new discovery 2012 LA11 (MPEC) and, earlier, follow-up in today's DOU MPEC for 2012 LU and 2012 LA as well as distant 2011 YW15. Today's first traffic report was generated at 1612 UTC.
Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. 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.
NEOCP Activity on 16 June '12
The MPC's NEO Confirmation Page has 48 listings
When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 48 objects listed. Of these, 25 were "one nighters." The Tracking News counted a total of 57 listings on the NEOCP on this day.
New MPECs on 16 June '12
Minor Planet Electronic Circulars
As of last check at 2359 UTC, there were four MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2012-M01 time-stamped "00:32 UT" - 2012 LL9 - see below
- MPEC 2012-M02 time-stamped "06:02 UT" - Daily Orbit Update - see below
- MPEC 2012-M03 time-stamped "22:06 UT" - 2012 LA11 - see below
- MPEC 2012-M04 time-stamped "22:52 UT" - P/2004 H3 = 2012 L4 (Larsen)
MPEC 2012-M04 - "22:52 UT" - P/2004 H3 = 2012 L4 (Larsen)
- PK12L040 P/2012 L4 (q=2.450 AU, TP=2011 Nov. 21.96869 TT) from the SZTE Asteroid Program (June 15.92-93p3, 16.01p1 & 16.89-92p3)
- PK04H030 P/2004 H3 (Larsen) (q=2.437 AU, Q=5.349 AU, TP=2004 Mar. 13.16675 TT)
MPEC 2012-M03 - "22:06 UT" - 2012 LA11
- K12L11A 2012 LA11 (Earth MOID=2.5 LD, i=4.9°, H=26.1 ~20m, close passer) from LINEAR (June 15.22-26p5), the Catalina Sky Survey (CSS) (June 15.22-25p4 & 15.36p3), Kevin Hills via RAS Obs. Moorook (June 15.44-45p3), San Marcello Pistoiese Obs. (June 15.86-87p4), Eschenberg Obs. (June 15.89-90p5), New Millennium Obs. (June 15.90p3), Farra d'Isonzo Obs. (June 15.94-95p2), St. Pardon de Conques Obs. (June 15.95-97p4), Astronomical Research Obs. Westfield (June 16.11-12p4), Sandlot Obs. (June 16.14-15p2), Sabino Canyon Obs. (June 16.30p3), and Terskol Obs. (June 16.79-80p3)
<< DOU on 16 June '12 >> MPEC 2012-M02 - "06:02 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K12L01R 2012 LR1 (i=42.3°, arc=7 days, H=20.5 ~269m) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (June 15.11-12p3), ARO Westfield (June 15.26p3), the Mt. Lemmon Survey (MLS) (June 15.29-31p4), the Spacewatch 1.8m telescope (June 15.34p3), and San Marcello Pistoiese Obs. (June 15.92p3)
- Observations of recently (no longer) risk-listed objects
- K12K42U 2012 KU42 (arc=21 days, H=17.6 ~1.02 km) from ARO Westfield (June 15.36-37p3) and CSS (June 15.39-42p4)
- K12J17R 2012 JR17 (Q=4.124 AU, arc=32 days, H=17.8 ~933m) from ARO Westfield (June 15.37-38p3)
- K12J11S 2012 JS11 (Q=4.738 AU, arc=31 days, H=20.0 ~339m) from Desert Moon Obs. (June 15.17-21p2 & 15.25p1)
- Observations of close-passing objects
- K12L00U 2012 LU (arc=6 days, H=25.2 ~31m) from Petit Jean Mtn. South Obs. (PJMSO) (June 15.18-19p7) and ARO Westfield (June 15.23p4)
- K12L00A 2012 LA (arc=14 days, H=27.5 ~11m, PMD candidate) from ARO Westfield (June 15.26-30p3 at V=22.4-5)
- K11Y15W 2011 YW15 (arc=55 days, H=24.7 ~39m) from David Tholen's team on Mauna Kea (Feb. 13.57p3)
- Observation campaigns (radar support, potential mission destinations)
- K12L01Z 2012 LZ1 (Q=4.149 AU, arc=5 days, H=19.8 ~371m, radar) from Pan-STARRS 1 (PS1) (June 14.46-50p4), PJMSO (June 15.29p16), RAS Obs. Mayhill (June 15.31-32p10), Iowa Robotic Obs. (June 15.36-38p3), ARO Westfield (June 15.37-38p9), the Siding Spring Survey (SSS) (June 15.63p5), Verona Obs. (June 15.90p4), Eschenberg Obs. (June 15.91p3), Teide Obs. (June 16.00-03p9), and San Marcello Pistoiese Obs. (June 16.01-05p4)
- K11Y74U 2011 YU74 (arc=170 days, H=23.0 ~85m, PMD candidate) from Mark Trueblood via Kitt Peak Natl. Obs. (KPNO) (June 14.45-46p3)
- W9437 329437 2002 OA22 (PMD) from Castelmartini Obs. (June 15.91-92p3)
- G2173 162173 1999 JU3 (PMD) from MLS (June 15.27-29p4)
-- Potential mission destinations list & ephemerides + NHATS -- Planetary radar schedules: Arecibo & Goldstone - Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
- K12L04G 2012 LG4 (arc=3 days, H=23.6 ~65m) from Holmes/CTIO (June 14.95-96p3) and ARO Westfield (June 15.22p4)
- K12L04F 2012 LF4 (arc=3 days, H=24.5 ~43m) from ARO Westfield (June 15.27-28p5)
- K12L01P 2012 LP1 (arc=5 days, H=23.4 ~71m) from Holmes/CTIO (June 14.99-00p3)
- K12J11H 2012 JH11 (arc=32 days, H=22.2 ~123m) from PS1 (June 15.40-44p3)
- K12H00O 2012 HO (arc=32 days, H=22.7 ~98m) from ARO Westfield (June 9.17-22p3 at V=22.7-23.1, 14.20-24p3 at V=23.0-3 & 15.21-23p2 at V=22.9-23.6)
- K12G05D 2012 GD5 (arc=64 days, H=22.5 ~107m) from Spacewatch 1.8m (June 15.23p2)
- K12L01D 2012 LD1 (arc=7 days, H=21.9 ~141m) from ARO Westfield (June 15.11-12p3), PJMSO (June 15.19-20p6), and Mirasteilas Obs. (June 15.97-98p3)
- Observations of other asteroidal objects
- K12L07U 2012 LU7 (arc=3 days, H=18.9 ~562m) from Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) (June 14.24p3), Paus Obs. (June 14.91-93p3), and PJMSO (June 15.23-24p8)
- K12L07T 2012 LT7 (i=41.6°, q=0.260 AU, arc=2 days, H=19.1 ~513m) from Valdicerro Obs. (June 14.89-93p2)
- K12L02K 2012 LK2 (Q=4.183 AU, arc=5 days, H=17.3 ~1.17 km) from ARO Westfield (June 15.32-33p3)
- K12L02J 2012 LJ2 (arc=4 days, H=21.6 ~162m) from ARO Westfield (June 15.28-29p4)
- K12L01C 2012 LC1 (arc=8 days, H=16.1 ~2.04 km, q=0.475 AU) from ARO Westfield (June 15.11-12p4) and Stia Obs. (June 15.87-89p5)
- K12K45M 2012 KM45 (arc=17 days, H=18.7 ~616m) from ARO Westfield (June 15.12-13p4)
- K12K06C 2012 KC6 (arc=28 days, H=21.7 ~155m) from PS1 (June 14.35-38p3) and ARO Westfield (June 15.24-25p3)
- K12J17T 2012 JT17 (Q=4.005 AU, arc=31 days, H=18.5 ~676m) from Spacewatch 1.8m (June 15.16-17p3)
- K12J16B 2012 JB16 (arc=32 days, H=19.7 ~389m) from Holmes/CTIO (June 14.97-98p4) and ARO Westfield (June 15.14-16p3)
- K12J04U 2012 JU4 (arc=48 days, H=20.8 ~234m) from Spacewatch 1.8m (June 15.26p3)
- K12H33Y 2012 HY33 (arc=49 days, H=19.4 ~446m) from Spacewatch 1.8m (June 15.24-25p3)
- K12H31G 2012 HG31 (arc=61 days, H=18.9 ~562m) from ARO Westfield (June 15.17p4), Eschenberg Obs. (June 15.87-88p3), and GiaGa Obs. (June 15.90-94p2)
- K12H15R 2012 HR15 (Q=4.308 AU, arc=54 days, H=16.8 ~1.48 km) from Spacewatch 1.8m (June 15.19-20p3)
- K12H01W 2012 HW1 (i=49.6°, q=0.359 AU, arc=60 days, H=19.8 ~371m) from Spacewatch 1.8m (June 16.19p3)
- K12D61H 2012 DH61 (arc=108 days, H=19.2 ~490m) from PJMSO (June 15.15p7) and Castelmartini Obs. (June 15.94-95p3)
- K12D32X 2012 DX32 (arc=2 opp, H=21.3 ~186m) from MLS (June 15.25-27p4)
- K11WD4V 2011 WV134 (Q=4.676 AU, arc=3 opp, H=17.1 ~1.29 km) from PJMSO (June 15.21-22p6) and Eschenberg Obs. (June 15.86p7)
- K10U07T 2010 UT7 (arc=2 opp, H=19.5 ~426m) from Spacewatch 1.8m (June 16.17-18p3)
- K10L14G 2010 LG14 (q=0.269 AU, arc=3 opp, H=17.8 ~933m) from CSS (June 15.37-39p4)
- K10J39U 2010 JU39 (i=36.2°, arc=4 opp, H=19.6 ~407m) from Spacewatch 1.8m (June 15.44-45p3)
- K09N00H 2009 NH (arc=2 opp, H=18.7 ~616m) from the Spacewatch 0.9m telescope (June 15.17-22p3)
- K08S07X 2008 SX7 (arc=2 opp, H=18.4 ~708m) from Spacewatch 1.8m (June 15.45p3)
- K08A32F 2008 AF32 (arc=2 opp, H=21.1 ~204m) from ARO Westfield (June 15.18p2)
- K07M13M 2007 MM13 (i=38.2°, arc=4 opp, H=17.7 ~977m) from Nonndorf Obs. (June 14.98-99p6)
- K04RX1U 2004 RU331 (arc=2 opp, H=20.5 ~269m) from SZTE (June 15.89-91p3)
- K04B86L 2004 BL86 (arc=5 opp, H=18.9 ~562m) from Spacewatch 1.8m (June 15.39p3)
- K02V69P 2002 VP69 (arc=6 opp, H=17.9 ~891m) from PS1 (June 14.46-49p3)
- K00R53D 2000 RD53 (arc=2 opp, H=20.1 ~323m) from Spacewatch 1.8m (June 15.41p2)
- J98X02N 1998 XN2 (arc=2 opp, H=19.5 ~426m) from Spacewatch 1.8m (June 15.28p2)
- W9275 329275 1999 VP6 from GiaGa Obs. (June 15.92-96p2)
- W6732 326732 2003 HB6 from PS1 (June 15.38-43p4)
- O8818 248818 2006 SZ217 from Desert Moon Obs. (June 15.29-32p3)
- M6219 226219 2002 VT85 from MLS (June 15.18-20p4)
- G3732 163732 2003 KP2 from PS1 (June 15.35-37p4)
- F4302 154302 2002 UQ3 from SZTE (June 15.97-99p3)
- E3637 143637 2003 LP6 from PS1 (June 15.33-37p4)
- E1056 141056 2001 XV4 from Desert Moon Obs. (June 15.13-14p5)
- B2221 112221 2002 KH4 from Stia Obs. (June 15.84-85p4)
- 24445 24445 2000 PM8 from Spacewatch 0.9m (June 15.26-29p3)
- 20460 20460 Robwhiteley (1999 LO28) from CSS (June 15.36-39p4)
- 07092 7092 Cadmus (1992 LC) from CSS (June 15.17-18p4)
- 05626 5626 1991 FE from Nonndorf Obs. (June 14.92-93p2)
MPEC 2012-M01 - "00:32 UT" - 2012 LL9
- K12L09L 2012 LL9 (Q=4.836 AU, H=18.5 ~676m) from CSS (June 13.28-32p8), Terskol Obs. (June 13.90-91p3), St. Pardon de Conques Obs. (June 13.91-92p3), Great Shefford Obs. (June 13.92-94p3), ARO Westfield (June 14.11-13p3 & 15.19-21p2), Hidetaka Sato via RAS Obs. Mayhill (June 14.19p4), Magdalena Ridge Obs. (MRO) (June 14.20-24p4 & 15.23-25p4), New Millennium Obs. (June 14.90-92p3), SZTE (June 14.99-00p5), Libbiano Obs. (June 15.05-06p2), and San Marcello Pistoiese Obs. (June 15.88-89p3)
Observers on 16 June '12
A total of 38 observers appeared in this day's MPECs.
| Code | Observer / observatory |
|---|---|
| H21 | Astronomical Research Obs. Westfield in Illinois, 20 in MPECs 2012-M01, 2012-M02 & 2012-M03 -- 2012 LZ1, 2012 LU, 2012 LR1, 2012 LL9, 2012 LK2, 2012 LJ2, 2012 LG4, 2012 LF4, 2012 LD1, 2012 LC1, 2012 LA11, 2012 LA, 2012 KU42, 2012 KM45, 2012 KC6, 2012 JR17, 2012 JB16, 2012 HO, 2012 HG31, 2008 AF32 |
| 160 | Castelmartini Obs. in Italy, 2 in MPEC 2012-M02 -- 2012 DH61, 329437 |
| 703 | Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2012-M01, 2012-M02 & 2012-M03 -- 2012 LL9, 2012 LA11, 2012 KU42, 2010 LG14, 20460, 7092 |
| 807| | Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPEC 2012-M02 -- 2012 LR1, 2012 LP1, 2012 LG4, 2012 JB16 |
| 448 | Desert Moon Obs. in New Mexico, 3 in MPEC 2012-M02 -- 2012 JS11, 248818, 141056 |
| G48 | Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2012-M02 -- 2012 LU7 |
| 151 | Eschenberg Obs. in Switzerland, 4 in MPECs 2012-M02 & 2012-M03 -- 2012 LZ1, 2012 LA11, 2012 HG31, 2011 WV134 |
| 595 | Farra d'Isonzo Obs. in Italy, 1 in MPEC 2012-M03 -- 2012 LA11 |
| 203 | GiaGa Obs. in Italy, 2 in MPEC 2012-M02 -- 2012 HG31, 329275 |
| J95 | Great Shefford Obs. in England, 1 in MPEC 2012-M01 -- 2012 LL9 |
| 857 | Iowa Robotic Obs. in Arizona, 1 in MPEC 2012-M02 -- 2012 LZ1 |
| 695] | Mark Trueblood via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2012-M02 -- 2011 YU74 |
| 704 | LINEAR in New Mexico, 1 in MPEC 2012-M03 -- 2012 LA11 |
| B33 | Libbiano Obs. in Italy, 1 in MPEC 2012-M01 -- 2012 LL9 |
| H01 | Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2012-M01 -- 2012 LL9 |
| 5682 | David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-M02 -- 2011 YW15 |
| B67 | Mirasteilas Obs. in Switzerland, 1 in MPEC 2012-M02 -- 2012 LD1 |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 4 in MPEC 2012-M02 -- 2012 LR1, 2012 DX32, 226219, 162173 |
| A24 | New Millennium Obs. in Italy, 2 in MPECs 2012-M01 & 2012-M03 -- 2012 LL9, 2012 LA11 |
| C47 | Nonndorf Obs. in Austria, 2 in MPEC 2012-M02 -- 2007 MM13, 5626 |
| F51 | Pan-STARRS 1 (PS1) in Hawaii, 7 in MPEC 2012-M02 -- 2012 LZ1, 2012 KC6, 2012 JH11, 2002 VP69, 326732, 163732, 143637 |
| B49 | Paus Obs. in Spain, 1 in MPEC 2012-M02 -- 2012 LU7 |
| H45 | Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2012-M02 -- 2012 LZ1, 2012 LU7, 2012 LU, 2012 LD1, 2012 DH61, 2011 WV134 |
| H06 | RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-M02 -- 2012 LZ1 |
| H06| | Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-M01 -- 2012 LL9 |
| D90` | Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2012-M03 -- 2012 LA11 |
| 461 | SZTE Asteroid Program in Hungary, 4 in MPECs 2012-M01, 2012-M02 & 2012-M04 -- 2012 LL9, P/2012 L4, 2004 RU331, 154302 |
| 854 | Sabino Canyon Obs. in Arizona, 1 in MPEC 2012-M03 -- 2012 LA11 |
| 104 | San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2012-M01, 2012-M02 & 2012-M03 -- 2012 LZ1, 2012 LR1, 2012 LL9, 2012 LA11 |
| H36 | Sandlot Obs. in Kansas, 1 in MPEC 2012-M03 -- 2012 LA11 |
| E12 | Siding Spring Survey in New South Wales, 1 in MPEC 2012-M02 -- 2012 LZ1 |
| 691 | Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2012-M02 -- 2009 NH, 24445 |
| 291 | Spacewatch 1.8m telescope in Arizona, 13 in MPEC 2012-M02 -- 2012 LR1, 2012 JU4, 2012 JT17, 2012 HY33, 2012 HW1, 2012 HR15, 2012 GD5, 2010 UT7, 2010 JU39, 2008 SX7, 2004 BL86, 2000 RD53, 1998 XN2 |
| I93 | St. Pardon de Conques Obs. in France, 2 in MPECs 2012-M01 & 2012-M03 -- 2012 LL9, 2012 LA11 |
| A78 | Stia Obs. in Italy, 2 in MPEC 2012-M02 -- 2012 LC1, 112221 |
| 954 | Teide Obs. in the Canary Islands, 1 in MPEC 2012-M02 -- 2012 LZ1 |
| B18 | Terskol Obs. in Russia, 2 in MPECs 2012-M01 & 2012-M03 -- 2012 LL9, 2012 LA11 |
| C92 | Valdicerro Obs. in Italy, 1 in MPEC 2012-M02 -- 2012 LT7 |
| A48 | Verona Obs. in Italy, 1 in MPEC 2012-M02 -- 2012 LZ1 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 16 June '12
| 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 LK9 | NEODyS | 1611 | 2020-2083 | 9 | 1.9e-08 | -3.55 | -3.83 | 0 | NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2012-06-12.355 to 2012-06-15.255." |
| JPL Sentry | 0424 | 2020-2067 | 3 | 1.1e-08 | -3.71 | -3.74 | 0 | JPL: "Analysis based on 25 observations spanning 2.9005 days (2012-Jun-12.35378 to 2012-Jun-15.25424)." Diameter approximately 1.005 km. from mean, weighted H=17.6. | |
| 2012 LR1 | JPL Sentry | 1611 | 2080 | 1 | 2.8e-07 | -4.13 | -4.13 | 0 | JPL: "Analysis based on 72 observations spanning 6.5204 days (2012-Jun-09.40456 to 2012-Jun-15.92499)." Diameter approximately 0.280 km. from mean, weighted H=20.4. |
| NEODyS | 1611 | 2080-2089 | 5 | 3.98e-07 | -3.99 | -4.01 | 0 | NEODyS: "Based on 72 optical observations (of which 0 are rejected as outliers) from 2012-06-09.405 to 2012-06-15.926." | |
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 16 June '12
Times are UTC for when items were noted or added by The Tracking News.
| 2359 | Grabbed MPEC 2012-M04 - P/2004 H3 = 2012 L4 (Larsen) - see above |
| 2350 | Updated Traffic Report |
| 2224 | Grabbed MPEC 2012-M03 - 2012 LA11 - see above |
| 1611 | Noted that NEODyS has posted 2012 LK9 as an impact risk - see above Noted that JPL Sentry has updated its 2012 LR1 risk assessment - see above Noted that NEODyS has updated its 2012 LR1 risk assessment - see above Grabbed MPEC 2012-M02 - Daily Orbit Update - see above |
| 0424 | Noted that JPL Sentry has posted 2012 LK9 as an impact risk - see above |
| 0047 | Grabbed MPEC 2012-M01 - 2012 LL9 - see above |
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