Contents on 19 June '12
- Traffic Report -- two objects
- Radar Astrometry -- two objects
- IAU Minor Planet Center
- NEOCP Activity -- 26 listings
- New MPECs -- three MPECs
- Observers -- 23 observers
- Impact Risk Monitoring -- four objects
- Chronology
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
Of 448 risk-listed objects, 17 have had news in the last 31 days. Updated at 1604 UTC on 19 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 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 19 June '12
Two objects reported inside ten LD
There are two asteroids reported to be inside ten lunar distances (LD) of Earth today. 2012 LU is inbound from 7.99 to 7.18 LD and 2012 LA11 is outbound from 8.86 to 9.66 LD. Nothing else is known to come this close until November.
This report was generated at 1606 UTC with follow-up in today's DOU MPEC for 2012 LA11 and 2012 LT.
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.
Radar Astrometry on 19 June '12
Radar observation of two objects
The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:
Data update noted at 1914 UTC when the database was dated 19 June
- 2012 LZ1 from Arecibo (June 19.28 velocity, 19.29 range, 19.30 velocity & 19.30 range)
Data update noted at 2200 UTC when the database was dated 19 June
- 2001 CQ36 (PMD) from Goldstone DSS-14 70m antenna (June 4.60 velocity) - priority PMD (list, ephemerides) - see links
NEOCP Activity on 19 June '12
The MPC's NEO Confirmation Page has 26 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 26 objects listed. Of these, twelve were "one nighters." So far The Tracking News has counted a total of 33 listings on the NEOCP today.
New MPECs on 19 June '12
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 2012-M20 time-stamped "06:02 UT" - Daily Orbit Update - see below
- MPEC 2012-M21 time-stamped "18:07 UT" - 2012 MW1 - see below
- MPEC 2012-M22 time-stamped "22:26 UT" - 2012 MN2
MPEC 2012-M22 - "22:26 UT" - 2012 MN2
- K12M02N 2012 MN2 (H=20.4 ~282m) from Pan-STARRS 1 (PS1) (June 16.54-58p4), the Spacewatch 1.8m telescope (June 17.43p3), and Tim Lister via Faulkes Telescope South (June 19.75p3)
MPEC 2012-M21 - "18:07 UT" - 2012 MW1
- K12M01W 2012 MW1 (i=37.4°, H=20.7 ~245m) from the Catalina Sky Survey (CSS) (June 17.23-25p3 & 17.30p2), Spacewatch 1.8m (June 17.31p3), and the Mt. Lemmon Survey (MLS) (June 17.32p4, 18.16-18p4 & 19.17-18p4)
<< DOU on 19 June '12 >> MPEC 2012-M20 - "06:02 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K12L11K 2012 LK11 (Q=4.266 AU, arc=4 days, H=20.3 ~295m) from Astronomical Research Obs. Westfield (June 18.37p3), Spacewatch 1.8m (June 18.41p3), and San Marcello Pistoiese Obs. (June 19.04-05p3)
- K12L09K 2012 LK9 (Q=4.078 AU, arc=6 days, H=17.8 ~933m) from Spacewatch 1.8m (June 18.16-17p3)
- K12L01R 2012 LR1 (i=42.3°, arc=9 days, H=20.4 ~282m) from ARO Westfield (June 18.15p3)
- K12B61U 2012 BU61 (Q=4.481 AU, arc=47 days, H=21.3 ~186m) from David Tholen's team on Mauna Kea (March 13.33p1 at R=24.4 & 13.39p1 at R=24.4)
- Observations of recently (no longer) risk-listed objects
- K12J17R 2012 JR17 (Q=4.124 AU, arc=35 days, H=17.8 ~933m) from CSS (June 18.41-43p4)
- Observations of close-passing objects
- K12L11A 2012 LA11 (arc=3 days, H=26.1 ~20m) from ARO Westfield (June 18.13-14p3)
- K12L00T 2012 LT (arc=10 days, H=25.8 ~23m) from the Siding Spring Survey (SSS) (June 18.79p1)
- Observation campaigns (radar support, potential mission destinations)
- K12L01Z 2012 LZ1 (Q=4.057 AU, arc=8 days, H=19.9 ~355m, radar) from Nonndorf Obs. (June 17.95-98p8), Westport Obs. (June 18.09-10p2), McDonald Obs. (June 18.28-30p58), Vicksburg Obs. (June 18.34-35p3), ARO Westfield (June 18.37-38p10), SSS (June 18.74p7), Chelmsford Obs. (June 18.93-94p5), Starry Wanderer Obs. (June 18.94p6), San Marcello Pistoiese Obs. (June 18.94-95p2), and South Obs. (June 18.95-97p6)
- K00E14A 2000 EA14 (arc=3 opp, H=21.0 ~214m, PMD) from PS1 (June 14.50-54p8)
- W9437 329437 2002 OA22 (PMD) from Castelmartini Obs. (June 16.88-89p3)
- F3958 153958 2002 AM31 (radar) from Castelmartini Obs. (June 16.99p3)
-- Potential mission destinations list & ephemerides + NHATS -- Planetary radar schedules: Arecibo & Goldstone - Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
- K12L11H 2012 LH11 (arc=3 days, H=22.1 ~129m) from ARO Westfield (June 18.28-29p3)
- K12L07W 2012 LW7 (arc=4 days, H=23.2 ~78m) from ARO Westfield (June 18.36p3)
- K12L07Q 2012 LQ7 (arc=5 days, H=24.2 ~49m) from ARO Westfield (June 18.16-18p3)
- K12L04G 2012 LG4 (arc=6 days, H=23.6 ~65m) from ARO Westfield (June 18.12-13p5)
- K12L04F 2012 LF4 (arc=7 days, H=24.5 ~43m) from South Obs. (June 18.98-99p3)
- K12L01D 2012 LD1 (arc=9 days, H=21.9 ~141m) from ARO Westfield (June 18.12-13p3)
- Observations of other asteroidal objects
- K12L11G 2012 LG11 (i=36.1°, arc=4 days, H=19.2 ~490m) from Hoyerswerda Obs. (June 17.92p3), ARO Westfield (June 18.30p3), and the SZTE Asteroid Program (June 19.04p7)
- K12L11E 2012 LE11 (Q=4.188 AU, arc=4 days, H=17.9 ~891m) from Nonndorf Obs. (June 17.98-00p6) and MLS (June 18.43-45p8)
- K12L09L 2012 LL9 (Q=4.868 AU, arc=5 days, H=18.5 ~676m) from ARO Westfield (June 18.14-15p3)
- K12L07U 2012 LU7 (arc=5 days, H=18.9 ~562m) from Castelmartini Obs. (June 16.99p3)
- K12K04A 2012 KA4 (q=0.242 AU, arc=33 days, H=21.2 ~195m) from Spacewatch 1.8m (June 19.19-22p3)
- K11WD4V 2011 WV134 (Q=4.676 AU, arc=3 opp, H=17.1 ~1.29 km) from CSS (June 18.33-34p3)
- K10OA1B 2010 OB101 (arc=2 opp, H=20.7 ~245m) from Tholen team/Mauna Kea (March 13.24-26p3 at R=22.3-6)
- K10L33R 2010 LR33 (arc=3 opp, H=18.0 ~851m) from Spacewatch 1.8m (June 19.17p3)
- K09V26A 2009 VA26 (i=38.9°, arc=2 opp, H=20.7 ~245m) from ARO Westfield (June 18.31-34p3 at V=22.5-8)
- K09V24O 2009 VO24 (arc=4 opp, H=19.7 ~389m) from PS1 (June 14.50-51p2)
- K09N00H 2009 NH (arc=2 opp, H=18.7 ~616m) from the Spacewatch 0.9m telescope (June 18.17-22p3)
- K09K22J 2009 KJ22 (arc=2 opp, H=20.0 ~339m) from Spacewatch 0.9m (June 18.18-23p3)
- K08V00H 2008 VH (arc=2 opp, H=20.0 ~339m) from Schwarzschild Obs. (2011 June 5.04-05p5)
- K07V07X 2007 VX7 (arc=2 opp, H=19.5 ~426m) from Spacewatch 0.9m (June 18.18-23p3)
- K07M13M 2007 MM13 (i=38.2°, arc=4 opp, H=17.7 ~977m) from Nonndorf Obs. (June 17.93-95p6)
- K04C00L 2004 CL (arc=6 opp, H=20.5 ~269m) from San Marcello Pistoiese Obs. (June 19.07p2)
- K03M04K 2003 MK4 (arc=2 opp, H=20.9 ~224m) from Spacewatch 1.8m (June 18.40p3)
- J94N00K 1994 NK (arc=2 opp, H=20.0 ~339m) from CSS (June 18.35-37p4)
- W6732 326732 2003 HB6 from Castelmartini Obs. (June 16.96-97p3)
- G3758 163758 2003 OS13 from CSS (June 18.35-37p3)
- F4144 154144 2002 FA5 from CSS (June 18.25-28p3)
- D7175 137175 1999 JA11 from PS1 (June 14.50-54p7)
- D6900 136900 1998 HL49 from Spacewatch 0.9m (June 18.17-22p3)
- 86667 86667 2000 FO10 from CSS (June 18.19-21p4)
- 52750 52750 1998 KK17 from PS1 (June 14.51-54p3)
- 05836 5836 1993 MF from MLS (June 18.15-17p3)
Observers on 19 June '12
A total of 23 observers appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| 251 | Arecibo in Puerto Rico, 1 in radar -- 2012 LZ1 |
| H21 | Astronomical Research Obs. Westfield in Illinois, 12 in MPEC 2012-M20 -- 2012 LZ1, 2012 LW7, 2012 LR1, 2012 LQ7, 2012 LL9, 2012 LK11, 2012 LH11, 2012 LG4, 2012 LG11, 2012 LD1, 2012 LA11, 2009 VA26 |
| 160 | Castelmartini Obs. in Italy, 4 in MPEC 2012-M20 -- 2012 LU7, 329437, 326732, 153958 |
| 703 | Catalina Sky Survey (CSS) in Arizona, 7 in MPECs 2012-M20 & 2012-M21 -- 2012 MW1, 2012 JR17, 2011 WV134, 1994 NK, 86667, 163758, 154144 |
| 970 | Chelmsford Obs. in England, 1 in MPEC 2012-M20 -- 2012 LZ1 |
| E100 | Tim Lister in southern California via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-M22 -- 2012 MN2 |
| 253 | Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2001 CQ36 |
| C43 | Hoyerswerda Obs., 1 in MPEC 2012-M20 -- 2012 LG11 |
| 5682 | David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2012-M20 -- 2012 BU61, 2010 OB101 |
| 711 | McDonald Obs. in Texas, 1 in MPEC 2012-M20 -- 2012 LZ1 |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2012-M20 & 2012-M21 -- 2012 MW1, 2012 LE11, 5836 |
| C47 | Nonndorf Obs. in Austria, 3 in MPEC 2012-M20 -- 2012 LZ1, 2012 LE11, 2007 MM13 |
| F51 | Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2012-M20 & 2012-M22 -- 2012 MN2, 2009 VO24, 2000 EA14, 52750, 137175 |
| 461 | SZTE Asteroid Program in Hungary, 1 in MPEC 2012-M20 -- 2012 LG11 |
| 104 | San Marcello Pistoiese Obs. in Italy, 3 in MPEC 2012-M20 -- 2012 LZ1, 2012 LK11, 2004 CL |
| 033 | Schwarzschild Obs. in Germany, 1 in MPEC 2012-M20 -- 2008 VH |
| E12 | Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2012-M20 -- 2012 LZ1, 2012 LT |
| J84 | South Obs. in England, 2 in MPEC 2012-M20 -- 2012 LZ1, 2012 LF4 |
| 691 | Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2012-M20 -- 2009 NH, 2009 KJ22, 2007 VX7, 136900 |
| 291 | Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2012-M20, 2012-M21 & 2012-M22 -- 2012 MW1, 2012 MN2, 2012 LK9, 2012 LK11, 2012 KA4, 2010 LR33, 2003 MK4 |
| C36 | Starry Wanderer Obs. in Belarus, 1 in MPEC 2012-M20 -- 2012 LZ1 |
| H47 | Vicksburg Obs. in Mississippi, 1 in MPEC 2012-M20 -- 2012 LZ1 |
| I42 | Westport Obs., 1 in MPEC 2012-M20 -- 2012 LZ1 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 19 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 LK11 | JPL Sentry | 1604 | 2023-2107 | 17 | 2.3e-06 | -3.06 | -3.19 | 0 | JPL: "Analysis based on 36 observations spanning 3.6898 days (2012-Jun-15.36399 to 2012-Jun-19.05376)." Diameter approximately 0.306 km. from mean, weighted H=20.2. |
| NEODyS | 1604 | 2023-2084 | 10 | 2.58e-06 | -2.96 | -3.06 | 0 | NEODyS: "Based on 36 optical observations (of which 0 are rejected as outliers) from 2012-06-15.365 to 2012-06-19.055." | |
| 2012 LK9 | JPL Sentry | 1604 | 2024-2099 | 9 | 6.1e-08 | -3.19 | -3.25 | 0 | JPL: "Analysis based on 34 observations spanning 5.8143 days (2012-Jun-12.35378 to 2012-Jun-18.16811)." Diameter approximately 1.042 km. from mean, weighted H=17.6. |
| NEODyS | 1604 | 2020-2083 | 14 | 1.14e-07 | -2.80 | -3.1 | 0 | NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2012-06-12.355 to 2012-06-18.169." | |
| 2012 LR1 | JPL Sentry | 1604 | 2080-2086 | 2 | 9.7e-08 | -4.59 | -4.59 | 0 | JPL: "Analysis based on 81 observations spanning 8.7494 days (2012-Jun-09.40456 to 2012-Jun-18.15396)." Diameter approximately 0.280 km. from mean, weighted H=20.4. |
| NEODyS | 1604 | 2074-2080 | 2 | 5.78e-08 | -4.82 | -4.82 | 0 | NEODyS: "Based on 81 optical observations (of which 0 are rejected as outliers) from 2012-06-09.405 to 2012-06-18.155." | |
| 2012 BU61 | JPL Sentry | 1604 | R E M O V E D | JPL: Risk listing removed at 0851 UTC. | |||||
| NEODyS | 1604 | R E M O V E D | - | ||||||
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 19 June '12
Times are UTC for when items were noted or added by The Tracking News.
| 2238 | Grabbed MPEC 2012-M22 - 2012 MN2 - see above |
| 2200 | Noted Radar Astrometry database update - see above |
| 1914 | Noted Radar Astrometry database update - see above |
| 1830 | Grabbed MPEC 2012-M21 - 2012 MW1 - see above |
| 1606 | Generated Traffic Report |
| 1604 | Noted that JPL Sentry has removed 2012 BU61 as an impact risk - see above Noted that NEODyS has removed 2012 BU61 as an impact risk - see above Noted that JPL Sentry has updated its 2012 LK11 risk assessment - see above Noted that NEODyS has updated its 2012 LK11 risk assessment - see above Noted that JPL Sentry has updated its 2012 LK9 risk assessment - see above Noted that NEODyS has updated its 2012 LK9 risk assessment - 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-M20 - Daily Orbit Update - see above |
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