A new study announced yesterday (also here) argues that "more than 90 percent of the observed Oort cloud comets have an extra-solar origin" (acquired from neighboring stellar nursery protoplanetary disks). One probable Oort Cloud object is 1P/Halley, seen here between background star trails as its dark inactive nucleus was outward bound seven years ago at 28.06 times Earth's distance from the Sun. Credit ESO, observation by Olivier Hainaut with three eight-meter telescopes for three nights at Cerro Paranal in Chile to capture Halley at magnitude V=28.2.
Contents on 11 June '10
- IAU Minor Planet Center
- NEOCP Activity -- seven listings: 4 new, 3 updated
- New MPECs -- two MPECs
- Observers -- fifteen observing facilities
- Impact Risk Monitoring -- two objects
- Chronology
Resources:
- Consolidated Risk Tables - the CRT page
Of 324 risk-listed objects, 29 have had news in the last month. Updated at 1559 UTC. - Earth's Busy Neighborhood Traffic Report
One object is known to be within ten LD of Earth today. Updated at 0048 UTC. - Ephemerides for risk-rated and nearby objects
- News image catalog
- 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 11 June '10
The MPC's NEO Confirmation Page has 7 listings: 4 new, 3 updated
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and three updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of eight listings on the NEOCP at some point today.
New MPECs on 11 June '10
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2010-L59 time-stamped "06:09 UT" - Daily Orbit Update - see below
- MPEC 2010-L60 time-stamped "21:30 UT" - Comets C/1997 S6, 1998 D1, 1999 R5, 1999 S8, 2001 W5, 2002 B4 (SOHO)
MPEC 2010-L60 - "21:30 UT" - Comets C/1997 S6, 1998 D1, 1999 R5, 1999 S8, 2001 W5, 2002 B4 (SOHO)
- CK02B040 C/2002 B4 from the LASCO Coronagraph 3 aboard the Solar & Heliospheric Obs. (SOHO) (2002 Jan. 19.32-36p2, 2002 Jan. 19.40p1 & 2002 Jan. 19.45-53p5)
- CK01W050 C/2001 W5 from the LASCO Coronagraph 2 aboard the Solar & Heliospheric Obs. (SOHO) (2001 Nov. 22.60-67p5)
- CJ99S080 C/1999 S8 from SOHO C3 (1999 Sept. 20.07-10p2 & 1999 Sept. 20.14-22p4)
- CJ99R050 C/1999 R5 from SOHO C3 (1999 Sept. 9.32-43p6 & 1999 Sept. 9.47-53p4)
- CJ98D010 C/1998 D1 from SOHO C3 (1998 Feb. 26.98-07p3, 1998 Feb. 27.11p1, 1998 Feb. 27.23-28p2 & 1998 Feb. 27.32-40p3)
- CJ97S060 C/1997 S6 from SOHO C3 (1997 Sept. 20.49-53p2 & 1997 Sept. 20.61-71p4)
<< DOU on 11 June '10 >> MPEC 2010-L59 - "06:09 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K10L34M 2010 LM34 (small asteroid, Q=4.546 AU, arc=1 day, H=23.2 ~78m) from Farra d'Isonzo Obs. (June 10.88-90p2) and Libbiano Obs. (June 10.96p3)
- Observations of small asteroids (H>22.0)
- K10L14F 2010 LF14 (arc=5 days, H=23.9 ~56m) from Astronomical Research Obs. Westfield (June 10.25-26p3)
- K10L00F 2010 LF (arc=8 days, H=24.0 ~54m) from ARO Westfield (June 10.26-27p6)
- K10K10P 2010 KP10 (arc=21 days, H=23.4 ~71m) from ARO Westfield (June 10.27-29p3 at V=21.6-22.1)
- Observations of almost-small asteroids (21.7<H<=22.0)
- K10K00D 2010 KD (arc=25 days, H=21.9 ~141m) from ARO Westfield (June 10.16-17p2 & 10.25p2) and the Spacewatch 1.8m telescope (June 10.23p2)
- Observations of other objects
- K10L14N 2010 LN14 (arc=4 days, H=21.1 ~204m) from the Siding Spring Survey (SSS) (June 10.64-67p3)
- K10L14J 2010 LJ14 (arc=5 days, H=17.8 ~933m) from ARO Westfield (June 10.23-24p3)
- K10J88G 2010 JG88 (arc=27 days, H=19.4 ~446m) from ARO Westfield (June 10.15-17p3)
- K10J88F 2010 JF88 (arc=27 days, H=18.5 ~676m) from Doc Greiner Research Obs. (DGRO) (June 10.14-15p5)
- K10J41K 2010 JK41 (Q=4.300 AU, arc=31 days, H=20.1 ~323m) from ARO Westfield (June 10.12-13p3)
- K10J33K 2010 JK33 (arc=36 days, H=21.1 ~204m) from Spacewatch 1.8m (June 11.21-22p3)
- K10G62X 2010 GX62 (Q=5.033 AU, arc=61 days, H=20.1 ~323m) from the Spacewatch 0.9m telescope (June 10.29p1)
- K10G30H 2010 GH30 (arc=61 days, H=20.9 ~224m) from ARO Westfield (June 10.20-23p3)
- K10G06Y 2010 GY6 (arc=66 days, H=19.3 ~467m) from Spacewatch 1.8m (June 11.20p2)
- K10F80Z 2010 FZ80 (Q=5.063 AU, arc=9 days, H=20.5 ~269m) from David Tholen's team on Mauna Kea (April 6.24p3)
- K10E45V 2010 EV45 (arc=2 opp, H=19.8 ~371m) from Libbiano Obs. (June 11.03-05p2)
- K10CI0C 2010 CC180 (arc=2 opp, H=18.7 ~616m) from SSS (March 20.57-60p3)
- K10CH1J 2010 CJ171 (arc=116 days, H=21.0 ~214m) from Walnut Creek Obs. (June 10.27-28p3) and ARO Westfield (June 10.28-29p4)
- K10C44N 2010 CN44 (Q=4.777 AU, arc=115 days, H=19.7 ~389m) from Spacewatch 1.8m (June 10.24-25p2)
- K10C44M 2010 CM44 (arc=86 days, H=19.3 ~467m) from SSS (May 10.55-58p4)
- K09V24O 2009 VO24 (arc=2 opp, H=19.8 ~371m) from the Catalina Sky Survey (CSS) (June 10.29-31p5)
- K09K05D 2009 KD5 (arc=3 opp, H=18.4 ~708m) from Tzec Maun Obs. Mayhill (June 10.30-32p3)
- K09C05Q 2009 CQ5 (arc=2 opp, H=17.6 ~1.02 km) from SSS (April 10.44-46p2)
- K08J19V 2008 JV19 (arc=3 opp, H=20.6 ~257m) from ARO Westfield (June 10.18-19p3) and CSS (June 10.24-26p4)
- K07VI9G 2007 VG189 (arc=2 opp, H=19.0 ~537m) from the Mt. Lemmon Survey (MLS) (June 10.24-25p4)
- K07J20Z 2007 JZ20 (i=40.5°, arc=3 opp, H=18.5 ~676m) from ARO Westfield (June 10.18-20p5)
- K06KA3M 2006 KM103 (arc=3 opp, H=20.2 ~309m) from ARO Westfield (June 10.30-33p3)
- K06K01R 2006 KR1 (arc=3 opp, H=20.2 ~309m) from Spacewatch 1.8m (June 10.39-40p3)
- K04X50D 2004 XD50 (arc=2 opp, H=18.5 ~676m) from CSS (June 10.27-28p4)
- K04J20X 2004 JX20 (arc=3 opp, H=19.4 ~446m) from CSS (June 10.27-28p4)
- K01X00U 2001 XU (Q=4.724 AU, arc=5 opp, H=19.2 ~490m) from Spacewatch 1.8m (June 10.43-44p3)
- K01H00C 2001 HC (arc=4 opp, H=19.0 ~537m) from SSS (May 5.53-57p3)
- K00K44O 2000 KO44 (arc=6 opp, H=17.5 ~1.07 km) from Libbiano Obs. (June 11.02-03p3)
- K00EA4F 2000 EF104 (arc=6 opp, H=18.9 ~562m) from MLS (June 10.22-23p4)
- J96B01A 1996 BA1 (arc=2 opp, H=20.6 ~257m) from SSS (March 20.57p1)
- L8863 218863 2006 WO127 from CSS (June 10.21-23p4)
- L5442 215442 2002 MQ3 from WISE (June 6.47p1, 6.60p1, 6.73p1, 6.87p1, 6.00p1, 7.13p1, 7.26p1 & 7.39p1)
- G4121 164121 2003 YT1 from WISE (June 5.89p2, 6.02p2, 6.28p1, 6.55p1, 6.68p1 & 6.81p1)
- E3381 143381 2003 BC21 from MLS (June 10.44-45p4)
- D8847 138847 2000 VE62 from CSS (June 10.42-44p4)
- D8095 138095 2000 DK79 from SSS (May 9.64p1)
- D7170 137170 1999 HF1 from Santa Mama Obs. (June 10.85-87p5)
- 85989 85989 1999 JD6 from Libbiano Obs. (June 11.01p2)
- 85628 85628 1998 KV2 from MLS (June 10.24-25p4)
- 54789 54789 2001 MZ7 from WISE (June 2.94p1, 3.07p1, 3.20p1, 3.33-34p2, 3.47p1, 3.60p1, 3.73p1, 3.86p1, 3.00p1, 4.13p1, 4.26p1, 4.39p1, 4.53p1, 4.59p1, 4.66p1, 4.72p1, 4.79p1, 4.86p1, 4.92p1, 4.99p1, 5.05p1, 5.12p1, 5.19p1, 5.25p1, 5.32p1, 5.39p1, 5.45p1, 5.52p1, 5.58p1, 5.72p1, 5.78p1, 5.85p1, 5.91p1, 5.98p1, 6.05p2, 6.11p1, 6.18p1, 6.25p1, 6.31p1, 6.44p1, 6.51p1, 6.58p1, 6.71p1, 6.84p1, 6.97p1, 7.11p1, 7.24p1 & 7.37p1)
- 25916 25916 2001 CP44 from SSS (May 9.78-80p4)
- 23187 23187 2000 PN9 from Spacewatch 0.9m (June 10.38p1)
- 19764 19764 2000 NF5 from SSS (May 7.77-80p2)
- 05653 5653 Camarillo (1992 WD5) from SSS (May 9.69-71p3)
- 02368 2368 Beltrovata (1977 RA) from WISE (June 5.44p1, 5.58p1, 5.71p1, 5.97p1, 6.04p1, 6.11p1, 6.17p1, 6.30p1, 6.44p1 & 6.70p1)
- 01866 1866 Sisyphus (1972 XA) from CSS (June 10.17-18p4)
- 01685 1685 Toro (1948 OA) from SSS (March 20.67-71p4)
- 00887 887 Alinda (1918 DB) from CSS (June 10.32-34p5)
Observers on 11 June '10
Fifteen observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| H21 | Astronomical Research Obs. Westfield in Illinois, 12 in MPEC 2010-L59 -- 2010 LJ14, 2010 LF14, 2010 LF, 2010 KP10, 2010 KD, 2010 JK41, 2010 JG88, 2010 GH30, 2010 CJ171, 2008 JV19, 2007 JZ20, 2006 KM103 |
| 703 | Catalina Sky Survey (CSS) in Arizona, 8 in MPEC 2010-L59 -- 2009 VO24, 2008 JV19, 2004 XD50, 2004 JX20, 218863, 138847, 1866, 887 |
| H26 | Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2010-L59 -- 2010 JF88 |
| 595 | Farra d'Isonzo Obs. in Italy, 1 in MPEC 2010-L59 -- 2010 LM34 |
| B33 | Libbiano Obs. in Italy, 4 in MPEC 2010-L59 -- 2010 LM34, 2010 EV45, 2000 KO44, 85989 |
| 5682 | David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-L59 -- 2010 FZ80 |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 4 in MPEC 2010-L59 -- 2007 VG189, 2000 EF104, 85628, 143381 |
| B38 | Santa Mama Obs. in Italy, 1 in MPEC 2010-L59 -- 137170 |
| E12 | Siding Spring Survey (SSS) in New South Wales, 11 in MPEC 2010-L59 -- 2010 LN14, 2010 CM44, 2010 CC180, 2009 CQ5, 2001 HC, 1996 BA1, 25916, 19764, 138095, 5653, 1685 |
| 2492 | LASCO Coronagraph 2 aboard the Solar & Heliospheric Obs. in Earth-Sun L1 HALO orbit, 1 in MPEC 2010-L60 -- C/2001 W5 |
| 2493 | LASCO Coronagraph 3 (SOHO C3) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 5 in MPEC 2010-L60 -- C/2002 B4, C/1999 S8, C/1999 R5, C/1998 D1, C/1997 S6 |
| 691 | Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2010-L59 -- 2010 GX62, 23187 |
| 291 | Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2010-L59 -- 2010 KD, 2010 JK33, 2010 GY6, 2010 CN44, 2006 KR1, 2001 XU |
| H10 | Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2010-L59 -- 2009 KD5 |
| C51 | WISE in Earth polar orbit, 4 in MPEC 2010-L59 -- 54789, 215442, 164121, 2368 |
| G56 | Walnut Creek Obs. in northern California, 1 in MPEC 2010-L59 -- 2010 CJ171 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 11 June '10
| 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 |
| 2010 LM34 | JPL Sentry | 1559 | 2036-2048 | 2 | 1.9e-08 | -6.56 | -6.57 | 0 | JPL #2 for the day: "Analysis based on 28 observations spanning .67108 days (2010-Jun-10.2894 to 2010-Jun-10.96048)." Diameter approximately 0.079 km. from mean, weighted H=23.2. |
| NEODyS | 1559 | 2048 | 1 | 1.71e-08 | -6.68 | -6.68 | 0 | NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2010/06/10.290 to 2010/06/10.961." | |
| 2010 LL34 | NEODyS | 1559 | 2014-2090 | 209 | 2.03e-07 | -3.18 | -3.69 | 0 | NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2010/06/09.403 to 2010/06/10.452." |
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 '10
Times are UTC for when items were noted or added by The Tracking News.
| 2358 | Grabbed MPEC 2010-L60 - Comets C/1997 S6, 1998 D1, 1999 R5, 1999 S8, 2001 W5, 2002 B4 (SOHO) - see above |
| 1559 | Noted that NEODyS has posted 2010 LL34 as an impact risk - see above Noted that JPL Sentry has updated its 2010 LM34 risk assessment - see above Noted that NEODyS has posted 2010 LM34 as an impact risk - see above Grabbed MPEC 2010-L59 - Daily Orbit Update - see above |
| 0400 | Noted that JPL Sentry has posted 2010 LM34 as an impact risk - see above |
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