First noticed at Emily Lakdawalla's Planetary Society Blog yesterday is that Japan's space agency has posted images of successful solar sail deployment by its Ikaros spacecraft, which was launched last month into heliocentric orbit. The sail is 20 meters across diagonally and 0.0075mm thick. This is a technology test for a proposed mission to explore Jupiter Trojan asteroids. Image ©copyright 2010 JAXA.
Contents on 17 June '10
- IAU Minor Planet Center
- NEOCP Activity -- six listings: 2 new, 4 updated
- New MPECs -- three MPECs
- Observers -- 20 observing facilities
- Impact Risk Monitoring -- four objects
- Chronology
Resources:
- Consolidated Risk Tables - the CRT page
Of 325 risk-listed objects, 30 have had news in the last month. Updated at 2214 UTC. - Earth's Busy Neighborhood Traffic Report
One object is known to be within ten LD of Earth today. Updated at 1647 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 17 June '10
The MPC's NEO Confirmation Page has 6 listings: 2 new, 4 updated
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and four updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of nine listings on the NEOCP at some point today.
To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.
New MPECs on 17 June '10
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 2010-M11 time-stamped "06:11 UT" - Daily Orbit Update - see below
- MPEC 2010-M12 time-stamped "12:00 UT" - 2010 MB - see below
- MPEC 2010-M13 time-stamped "12:11 UT" - 2010 MC
MPEC 2010-M13 - "12:11 UT" - 2010 MC
- K10M00C 2010 MC (small asteroid, H=24.5 ~43m) was discovered at 0726 UT on 16 June by the Catalina Sky Survey (CSS), which observed it at June 16.31-36p8. The discovery was confirmed by Sandlot Obs. (June 16.37-38p3 & 17.26-28p4), Magdalena Ridge Obs. (MRO) (June 16.37-39p4), Great Shefford Obs. (June 16.94-95p3), Astronomical Research Obs. Westfield (June 17.13p3), Tenagra II Obs. (June 17.25-27p3), Sabino Canyon Obs. (June 17.29-30p3), and the Spacewatch 1.8m telescope (June 17.29-30p3).
MPEC 2010-M12 - "12:00 UT" - 2010 MB
- K10M00B 2010 MB (small asteroid, H=24.6 ~41m) was discovered at 0424 UT on 16 June by the Mt. Lemmon Survey (MLS), which observed it at June 16.18-20p4, 16.28p3, and 17.15p4. The discovery was confirmed by MRO (June 16.23-25p4), ARO Westfield (June 16.23-25p3), Sandlot Obs. (June 16.24-27p3), Great Shefford Obs. (June 16.99-00p2), Tenagra II Obs. (June 17.17-18p2), and Spacewatch 1.8m (June 17.23-24p3).
<< DOU on 17 June '10 >> MPEC 2010-M11 - "06:11 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K10L34L 2010 LL34 (arc=8 days, H=19.4 ~446m) from Great Shefford Obs. (June 17.02-04p3)
- Observations of recently (no longer) risk-listed objects
- K10L61J 2010 LJ61 (arc=8 days, H=21.3 ~186m) from Spacewatch 1.8m (June 16.15-18p6)
- K10L34M 2010 LM34 (small asteroid, Q=4.395 AU, arc=6 days, H=23.2 ~78m) from CSS (June 16.36-38p4)
- K10K00Q 2010 KQ (small asteroid, arc=31 days, H=29.6 ~4m) from MLS (June 16.46p4)
- Observations of small asteroids (H>22.0)
- K10L68E 2010 LE68 (arc=1 day, H=25.7 ~25m) from Tenagra II Obs. (June 16.30-32p3)
- K10K10P 2010 KP10 (arc=27 days, H=23.4 ~71m) from Spacewatch 1.8m (June 16.27-28p3 at V=21.8-22.7)
- Observations of almost-small asteroids (21.7<H<=22.0)
- K10L34K 2010 LK34 (q=0.356 AU, arc=7 days, H=21.9 ~141m) from Tenagra II Obs. (June 16.21-22p2)
- Observations of other objects
- K10L63Y 2010 LY63 (arc=2 days, H=17.4 ~1.12 km) from Hawker Obs. (June 14.56-59p4)
- K10L33Q 2010 LQ33 (arc=14 days, H=19.5 ~426m) from Spacewatch 1.8m (June 17.16-17p3)
- K10L14J 2010 LJ14 (arc=11 days, H=17.9 ~891m) from Spacewatch 1.8m (June 16.20-21p3)
- K10J88F 2010 JF88 (arc=33 days, H=18.5 ~676m) from Desert Moon Obs. (June 16.17-19p3)
- K10HA4A 2010 HA104 (arc=15 days, H=21.4 ~178m) from David Tholen's team on Mauna Kea (May 16.24p1 at R=22.4)
- K10G62X 2010 GX62 (Q=5.033 AU, arc=150 days, H=20.1 ~323m) from WISE (Jan. 16.57p1, 16.71p1, 16.77p1, 16.97p1, 17.10p1, 17.17p1 & 17.30p1)
- K10G62W 2010 GW62 (arc=67 days, H=19.4 ~446m) from Spacewatch 1.8m (June 16.26-27p3)
- K10F81B 2010 FB81 (Q=4.136 AU, arc=118 days, H=21.4 ~178m) from WISE (Jan. 18.70p1, 18.83p1, 18.97p1, 19.10p1, 19.16p1, 19.36p1, 19.43p1, 19.49p1, 19.69p1, 19.83p1 & 19.96p2)
- K10F00Q 2010 FQ (arc=146 days, H=20.0 ~339m) from WISE (Jan. 16.58p1, 16.71p1, 16.98p1, 17.11p1, 17.17p1, 17.24p1, 17.31p1, 17.37p1, 17.51p1, 17.57p1 & 17.70p1)
- K10E45V 2010 EV45 (arc=2 opp, H=19.8 ~371m) from Doc Greiner Research Obs. (DGRO) (June 17.24p3)
- K10E20H 2010 EH20 (arc=102 days, H=17.9 ~891m) from Capannoli Obs. (June 16.93-94p2)
- K10C55A 2010 CA55 (i=55.7°, Q=4.490 AU, arc=4 days, H=21.1 ~204m) from WISE (Feb. 4.72p1, 4.98p1, 5.12p1, 5.25p1, 5.31p1, 5.38p1, 5.78p1, 5.98p1, 6.04p1, 7.56p1, 8.23p1, 8.36p1, 8.62p1, 8.75p1 & 8.89p1)
- K10C18L 2010 CL18 (Q=4.186 AU, arc=123 days, H=18.3 ~741m) from Desert Moon Obs. (June 16.31-33p3)
- K10C18H 2010 CH18 (Q=4.094 AU, arc=125 days, H=19.0 ~537m) from WISE (Feb. 9.81p1, 10.27p1 & 10.34p1)
- K10C18G 2010 CG18 (arc=64 days, H=21.0 ~214m) from WISE (Jan. 19.50p1, 19.63p1, 19.76p1, 19.89p1, 20.03p1, 20.16p1, 20.29p1, 20.42p1, 20.55p1, 20.69p1, 20.82p1, 20.95p1, 21.08p2, 21.15p1, 21.22p1, 21.28p2, 21.35p1, 21.42p1, 21.48p2, 21.55p1, 21.61p1, 21.68p1, 21.75p1, 21.81p1, 21.88p1, 21.94p1, 22.01p1, 22.08p1, 22.14p1, 22.21p1, 22.28p1, 22.34p1, Feb. 4.31p1, 4.38p1, 4.44p2, 4.51p1, 4.58p1, 4.71p1, 4.84p1, 4.97p1, 5.11p1, 5.24p1, 5.50p1, 5.63p1, 5.77p1, 5.90p1, 6.03p1, 6.16p1, 6.69p1, 6.96p1, 7.49p1, 7.88p1, 8.02p1 & 8.15p1)
- K10B02H 2010 BH2 (arc=149 days, H=19.5 ~426m) from Spacewatch 1.8m (June 16.24-25p3)
- K10A79G 2010 AG79 (Q=4.586 AU, arc=70 days, H=20.2 ~309m) from WISE (Jan. 15.80p1, 15.99p1, 16.13p1, 16.52p1 & 16.66p1)
- K09X02C 2009 XC2 (Q=4.187 AU, arc=3 opp, H=17.1 ~1.29 km) from LINEAR (June 16.37-41p5)
- K09WA4Z 2009 WZ104 (arc=82 days, H=20.0 ~339m) from WISE (Jan. 18.03p2, 18.17p1, 18.30p1, 18.37p2, 18.43p1, 18.50p1, 18.56p1, 18.63p1, 18.70p1, 19.03p2 & 19.16p1)
- K09WA4F 2009 WF104 (Q=5.100 AU, arc=135 days, H=17.1 ~1.29 km) from WISE (Feb. 3.71p1, 3.85p1, 3.98p1, 4.11p1, 4.18p1, 4.24p2, 4.31p1, 4.38p1, 4.44p1, 4.57p1, 4.71p1 & 4.84p1)
- K09W06O 2009 WO6 (Q=4.883 AU, arc=121 days, H=17.3 ~1.17 km) from WISE (Jan. 16.19p2, 16.32p1, 16.45p1, 16.58p1, 16.72p1, 16.78p1, 16.85p1, 16.91p1, 16.98p1, 17.05p2, 17.11p1, 17.18p1 & 17.31p1)
- K09U18V 2009 UV18 (Q=5.185 AU, arc=2 opp, H=16.0 ~2.14 km, q=1.167 AU) from LINEAR (June 15.17-21p5)
- K09K05D 2009 KD5 (arc=3 opp, H=18.4 ~708m) from CSS (June 16.29-30p4), Petit Jean Mtn. South Obs. (PJMSO) (June 16.30-31p5), Hamamatsu-Yuto Obs. (June 16.47-48p2 & 16.58-59p4), and Capannoli Obs. (June 16.91p3)
- K07VI9G 2007 VG189 (arc=2 opp, H=18.9 ~562m) from LINEAR (June 16.17-21p5)
- K07O03G 2007 OG3 (arc=3 opp, H=18.2 ~776m) from LINEAR (2007 Oct. 14.38-42p7)
- K07H59A 2007 HA59 (i=54.7°, Q=4.335 AU, arc=3 opp, H=15.3 ~2.95 km, q=0.688 AU) from DGRO (June 17.16-17p9)
- K06K21L 2006 KL21 (arc=2 opp, H=20.7 ~245m) from Desert Moon Obs. (June 16.35-37p3)
- K05U01K 2005 UK1 (Q=4.238 AU, arc=4 opp, H=18.0 ~851m) from Desert Moon Obs. (June 16.14-15p3)
- K03Q90B 2003 QB90 (arc=4 opp, H=18.0 ~851m) from LINEAR (June 15.38-42p5)
- K03N06Z 2003 NZ6 (arc=5 opp, H=19.0 ~537m) from PJMSO (June 16.31p5)
- K03H00B 2003 HB (arc=3 opp, H=19.7 ~389m) from Spacewatch 1.8m (June 17.18p3)
- K02O04S 2002 OS4 (arc=3 opp, H=18.2 ~776m) from Desert Moon Obs. (June 16.40-45p3)
- K01B15Y 2001 BY15 (Q=4.027 AU, arc=2 opp, H=18.9 ~562m) from Spacewatch 1.8m (June 16.35-36p3)
- J99M00N 1999 MN (q=0.225 AU, arc=3 opp, H=21.4 ~178m) from LINEAR (June 16.16-21p5)
- J98X02M 1998 XM2 (arc=7 opp, H=17.1 ~1.29 km) from LINEAR (June 16.17-21p5)
- N9849 239849 1999 VO11 from WISE (June 7.89p1, 8.16p1, 8.29p1, 8.42p1, 8.56p1, 8.69p1, 8.82p1, 8.95p1, 9.22p1, 9.35p1, 9.48p1, 9.55p1, 9.61p1, 9.68p1, 9.75p1, 9.81p1, 9.94p1, 10.21p1, 10.28p1, 10.34p1, 10.47p1, 10.61p1, 10.74p1, 10.80p1, 11.00p2, 12.59p1, 12.72p1, 12.86p1, 13.12p2 & 13.38p1)
- L5442 215442 2002 MQ3 from WISE (June 7.46p1, 7.59p1, 7.73p1, 7.79p1, 7.86p1, 7.92p1, 7.99p1, 8.25p1, 8.39p1, 8.52p1, 8.65p1, 8.78p1 & 8.92p1)
- G1998 161998 1988 PA from Capannoli Obs. (June 16.92-93p2)
- F2671 152671 1998 HL3 from WISE (June 12.33p1, 12.46p1, 12.59p1, 12.66p1, 12.72p1, 12.79p1 & 12.92p1)
- F2564 152564 1992 HF from WISE (June 7.56p1, 7.63p1, 7.70p1, 7.76p1 & 7.89p1)
- 88263 88263 2001 KQ1 from CSS (June 16.20-21p3)
- 85628 85628 1998 KV2 from LINEAR (June 16.18-21p4)
- 54789 54789 2001 MZ7 from WISE (June 5.65p1, 6.38p1, 7.50p1, 7.63p2, 7.77p1, 7.90p1 & 8.03p1)
- 52750 52750 1998 KK17 from La Sagra Obs. (June 15.91-94p3) and Capannoli Obs. (June 16.89-90p2)
- 17188 17188 1999 WC2 from WISE (June 11.10p1, 11.36p1, 11.49p1, 11.56p1, 11.63p1, 11.69p1, 11.76p1, 11.82p1, 11.89p1, 11.96p1, 12.09p1 & 12.22p1)
- 16064 16064 1999 RH27 from WISE (June 13.91p1, 14.04p1, 14.18p1, 14.31p1 & 14.44p1)
- 09202 9202 1993 PB from WISE (June 8.46p1, 8.59p1, 8.72p1, 8.79p1, 8.85p1, 8.99p1, 9.05p2, 9.18p2 & 9.45p1)
- 07350 7350 1993 VA from LINEAR (June 15.32-36p4)
- 04055 4055 Magellan (1985 DO2) from Capannoli Obs. (June 16.88p3)
- 03551 3551 Verenia (1983 RD) from LINEAR (June 14.21-24p4)
- 01036 1036 Ganymed (1924 TD) from Mt. Tuffley Obs. (June 16.92p3)
- 00887 887 Alinda (1918 DB) from LINEAR (June 15.22-26p5)
Observers on 17 June '10
A total of 20 observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| H21 | Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2010-M12 & 2010-M13 -- 2010 MC, 2010 MB |
| B09 | Capannoli Obs. in Italy, 5 in MPEC 2010-M11 -- 2010 EH20, 2009 KD5, 52750, 161998, 4055 |
| 703 | Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2010-M11 & 2010-M13 -- 2010 MC, 2010 LM34, 2009 KD5, 88263 |
| 448 | Desert Moon Obs. in New Mexico, 5 in MPEC 2010-M11 -- 2010 JF88, 2010 CL18, 2006 KL21, 2005 UK1, 2002 OS4 |
| H26 | Doc Greiner Research Obs. (DGRO) in Wisconsin, 2 in MPEC 2010-M11 -- 2010 EV45, 2007 HA59 |
| J95 | Great Shefford Obs. in England, 3 in MPECs 2010-M11, 2010-M12 & 2010-M13 -- 2010 MC, 2010 MB, 2010 LL34 |
| 379 | Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2010-M11 -- 2009 KD5 |
| 429 | Hawker Obs., 1 in MPEC 2010-M11 -- 2010 LY63 |
| 704 | LINEAR in New Mexico, 11 in MPEC 2010-M11 -- 2009 XC2, 2009 UV18, 2007 VG189, 2007 OG3, 2003 QB90, 1999 MN, 1998 XM2, 85628, 7350, 3551, 887 |
| J75 | La Sagra Obs. in Spain, 1 in MPEC 2010-M11 -- 52750 |
| H01 | Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2010-M12 & 2010-M13 -- 2010 MC, 2010 MB |
| 5682 | David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-M11 -- 2010 HA104 |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2010-M11 & 2010-M12 -- 2010 MB, 2010 KQ |
| J93 | Mt. Tuffley Obs. in England, 1 in MPEC 2010-M11 -- 1036 |
| H45 | Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2010-M11 -- 2009 KD5, 2003 NZ6 |
| 854 | Sabino Canyon Obs. in Arizona, 1 in MPEC 2010-M13 -- 2010 MC |
| H36 | Sandlot Obs. in Kansas, 2 in MPECs 2010-M12 & 2010-M13 -- 2010 MC, 2010 MB |
| 291 | Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2010-M11, 2010-M12 & 2010-M13 -- 2010 MC, 2010 MB, 2010 LQ33, 2010 LJ61, 2010 LJ14, 2010 KP10, 2010 GW62, 2010 BH2, 2003 HB, 2001 BY15 |
| 926 | Tenagra II Obs. in Arizona, 4 in MPECs 2010-M11, 2010-M12 & 2010-M13 -- 2010 MC, 2010 MB, 2010 LK34, 2010 LE68 |
| C51 | WISE in Earth polar orbit, 18 in MPEC 2010-M11 -- 2010 GX62, 2010 FQ, 2010 FB81, 2010 CH18, 2010 CG18, 2010 CA55, 2010 AG79, 2009 WZ104, 2009 WO6, 2009 WF104, 54789, 239849, 215442, 17188, 16064, 152671, 152564, 9202 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 17 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 LJ68 | NEODyS | 1509 | 2015-2089 | 82 | 1.44e-07 | -5.60 | -6.37 | 0 | NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2010/06/11.741 to 2010/06/16.222." |
| 2010 LL34 | JPL Sentry | 1509 | R E M O V E D | JPL: Risk listing removed at 0955 UTC. | |||||
| 2010 DJ77 | JPL Sentry | 2214 | 2024-2107 | 147 | 1.1e-06 | -6.99 | -7.94 | 0 | JPL: "Analysis based on 8 observations spanning .86030 days (2010-Feb-20.49966 to 2010-Feb-21.35996)." Diameter approximately 0.015 km. from mean, weighted H=26.8. |
| 2009 TB | JPL Sentry | 1907 | 2014-2091 | 47 | 1.3e-05 | -6.26 | -6.96 | 0 | JPL: "Analysis based on 12 observations spanning .10702 days (2009-Oct-02.2061 to 2009-Oct-02.31312)." Diameter approximately 0.005 km. from mean, weighted H=29.2. |
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 17 June '10
Times are UTC for when items were noted or added by The Tracking News.
| 2214 | Noted that JPL Sentry has updated its 2010 DJ77 risk assessment - see above |
| 1907 | Noted that JPL Sentry has posted 2009 TB as an impact risk - see above |
| 1509 | Noted that NEODyS has posted 2010 LJ68 as an impact risk - see above Noted that JPL Sentry has removed 2010 LL34 as an impact risk - see above Grabbed MPEC 2010-M11 - Daily Orbit Update - see above Grabbed MPEC 2010-M12 - 2010 MB - see above Grabbed MPEC 2010-M13 - 2010 MC - see above |
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