Of 243,553 numbered minor objects, this is number 21: Main Belt asteroid Lutetia, which was discovered from a Paris apartment balcony in 1852 and was flown past yesterday by the Rosetta comet mission. Credit: ESA OSIRIS team.
Contents on 11 July '10
- IAU Minor Planet Center
- Observers -- seventeen observing facilities
- Impact Risk Monitoring -- three objects
Note: A/CC news pages will update infrequently for much of the remainder of July.
- Consolidated Risk Tables - the CRT page
Of 330 risk-listed objects, 29 have had news in the last month. Updated at 1104 UTC.
- Earth's Busy Neighborhood Traffic Report
Two objects are known to be within ten LD of Earth today. Updated at 1145 UTC.
- Ephemerides for risk-rated and nearby objects
- News image catalog
- Old & new CRT Archive
- Old News Archive & Small Objects Archive
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 July '10
The MPC's NEO Confirmation Page has 7 listings: 3 new, 4 updated
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and four updated listings. Of these, two 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 11 July '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-N49 time-stamped "06:11 UT" - Daily Orbit Update - see below
- MPEC 2010-N50 time-stamped "17:16 UT" - 2010 NT1 - see below
- MPEC 2010-N51 time-stamped "23:56 UT" - 2010 NU1
MPEC 2010-N51 - "23:56 UT" - 2010 NU1
- K10N01U 2010 NU1 (H=21.2 ~195m) was discovered at 2230 UT on 6 July by WISE, which observed it at July 6.94p1, 7.00p1, 7.07p1, 7.27p1, and 7.33p2. The discovery was confirmed by Astronomical Research Obs. Westfield (July 10.13-16p3 at V=22.3-5) and David Tholen's team on Mauna Kea (July 10.34p2 at R=21.9-22.1).
MPEC 2010-N50 - "17:16 UT" - 2010 NT1
- K10N01T 2010 NT1 (i=39.5°, H=19.2 ~490m) was discovered at 0154 UT on 4 July by WISE, which observed it at July 4.08p1, 4.15p1, 4.21p1, 4.28p2, 4.34p1, 4.48p1, 4.61p2, 4.67p1, 4.74p1, 5.01p1, 5.14p1, 5.20p1, 5.27p1, and 5.34p1. The discovery was confirmed by Tholen team/Mauna Kea (July 11.25-26p6).
- Observations of risk-listed objects
- K10N00K 2010 NK (small asteroid, arc=5 days, H=24.4 ~45m) from the Siding Spring Survey (SSS) (July 8.51-53p2)
- K10N00H 2010 NH (small asteroid, arc=6 days, H=25.6 ~26m) from ARO Westfield (July 10.25-28p5)
- K10MB2U 2010 MU112 (i=48.3°, arc=10 days, H=21.0 ~214m) from ARO Westfield (July 6.33-37p3 at V=22.3-5 & 10.33-37p3 at V=22.3-6)
- Observations of recently (no longer) risk-listed objects
- K10L34M 2010 LM34 (small asteroid, Q=4.378 AU, arc=30 days, H=23.3 ~74m) from ARO Westfield (July 10.27-29p2 at V=22.9-23.2)
- Observations of small asteroids (H>22.0)
- K10N01K 2010 NK1 (arc=4 days, H=22.4 ~112m) from Castelmartini Obs. (July 9.90-91p5), ARO Westfield (July 10.11p3 & 10.23-24p3), Doc Greiner Research Obs. (DGRO) (July 10.18-19p4), and Libbiano Obs. (July 10.93-94p3)
- K10N00L 2010 NL (arc=5 days, H=25.9 ~22m) from ARO Westfield (July 10.31-32p4)
- K10N00G 2010 NG (arc=6 days, H=25.1 ~32m) from Kevin Hills via RAS Obs. Moorook (July 10.54-55p4)
- K10N00B 2010 NB (arc=5 days, H=23.0 ~85m) from ARO Westfield (July 5.16-17p3)
- Observations of other objects
- K10M87R 2010 MR87 (arc=18 days, H=19.5 ~426m) from ARO Westfield (July 10.20-22p3)
- K10M01Q 2010 MQ1 (i=37.3°, arc=21 days, H=20.2 ~309m) from ARO Westfield (July 10.28-30p5)
- K10L63Y 2010 LY63 (arc=26 days, H=17.6 ~1.02 km) from Tzec Maun Obs. Moorook (July 5.63-65p4 & 8.48-49p2), Grove Creek Obs. (July 8.53-54p2), and Rio Cuarto Obs. (July 9.12-14p3)
- K10L61K 2010 LK61 (arc=29 days, H=21.7 ~155m) from ARO Westfield (July 10.21-24p2 at V=22.7-8)
- K10ED5C 2010 EC135 (arc=119 days, H=20.1 ~323m) from Rio Cuarto Obs. (July 9.98-00p3)
- K10E20H 2010 EH20 (arc=125 days, H=18.1 ~812m) from Castelmartini Obs. (July 9.93p3) and Blanquita Obs. (July 10.01-02p3)
- K10CH1J 2010 CJ171 (arc=146 days, H=21.1 ~204m) from Castelmartini Obs. (July 9.97p3)
- K09X02C 2009 XC2 (Q=4.187 AU, arc=3 opp, H=17.1 ~1.29 km) from LINEAR (July 10.29-33p5)
- K09W26C 2009 WC26 (arc=2 opp, H=17.4 ~1.12 km) from Castelmartini Obs. (July 9.99-00p3)
- K08E09M 2008 EM9 (q=0.291 AU, arc=3 opp, H=17.4 ~1.12 km) from Rio Cuarto Obs. (July 10.02-04p2)
- K07O03G 2007 OG3 (arc=4 opp, H=18.2 ~776m) from LINEAR (July 10.23-27p5)
- K02P43D 2002 PD43 (q=0.110 AU, Q=4.907 AU, arc=2 opp, H=19.1 ~513m) from the Spacewatch 1.8m telescope (July 7.42-43p3 & 8.41-42p3)
- K02O04S 2002 OS4 (arc=3 opp, H=18.2 ~776m) from LINEAR (July 10.35-38p3)
- O1662 241662 2000 KO44 from La Sagra Obs. (July 10.05-08p3) and LINEAR (July 10.34-39p5)
- O1370 241370 2008 LW8 from Santa Mama Obs. (July 9.88p1)
- G1998 161998 1988 PA from Castelmartini Obs. (July 9.92p3) and Walnut Creek Obs. (July 10.21-23p3)
- F9609 159609 2002 AQ3 from Blanquita Obs. (July 10.03-04p3)
- F2889 152889 2000 CF59 from Santa Mama Obs. (July 9.91p1)
- 85989 85989 1999 JD6 from Castelmartini Obs. (July 9.94p3)
- 09202 9202 1993 PB from LINEAR (July 10.39-44p5)
- 07977 7977 1977 QQ5 from Castelmartini Obs. (July 9.91-92p3)
Observers on 11 July '10
Seventeen observing facilities appear in today's MPECs.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 10 in MPECs 2010-N49 & 2010-N51 -- 2010 NU1, 2010 NL, 2010 NK1, 2010 NH, 2010 NB, 2010 MU112, 2010 MR87, 2010 MQ1, 2010 LM34, 2010 LK61|
|I99||Blanquita Obs. in Spain, 2 in MPEC 2010-N49 -- 2010 EH20, 159609|
|160||Castelmartini Obs. in Italy, 7 in MPEC 2010-N49 -- 2010 NK1, 2010 EH20, 2010 CJ171, 2009 WC26, 85989, 161998, 7977|
|H26||Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2010-N49 -- 2010 NK1|
|E16||Grove Creek Obs. in New South Wales, 1 in MPEC 2010-N49 -- 2010 LY63|
|704||LINEAR in New Mexico, 5 in MPEC 2010-N49 -- 2009 XC2, 2007 OG3, 2002 OS4, 241662, 9202|
|J75||La Sagra Obs. in Spain, 1 in MPEC 2010-N49 -- 241662|
|B33||Libbiano Obs. in Italy, 1 in MPEC 2010-N49 -- 2010 NK1|
|5682||David Tholen's team on Mauna Kea in Hawaii, 2 in MPECs 2010-N50 & 2010-N51 -- 2010 NU1, 2010 NT1|
|D90`||Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2010-N49 -- 2010 NG|
|I20||Rio Cuarto Obs. in Argentina, 3 in MPEC 2010-N49 -- 2010 LY63, 2010 EC135, 2008 EM9|
|B38||Santa Mama Obs. in Italy, 2 in MPEC 2010-N49 -- 241370, 152889|
|E12||Siding Spring Survey in New South Wales, 1 in MPEC 2010-N49 -- 2010 NK|
|291||Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2010-N49 -- 2002 PD43|
|D96||Tzec Maun Obs. Moorook in South Australia, 1 in MPEC 2010-N49 -- 2010 LY63|
|C51||WISE in Earth polar orbit, 2 in MPECs 2010-N50 & 2010-N51 -- 2010 NU1, 2010 NT1|
|G56||Walnut Creek Obs. in northern California, 1 in MPEC 2010-N49 -- 161998|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 11 July '10
Notes for Today's Latest Risk Assessments
|2010 NK||JPL Sentry||1104||R E M O V E D||JPL: Risk listing removed at 0954 UTC.|
|2010 NH||JPL Sentry||1104||2077-2107||4||1.8e-06||-6.25||-6.59||0||JPL: "Analysis based on 41 observations spanning 5.8536 days (2010-Jul-04.42235 to 2010-Jul-10.27597)." Diameter approximately 0.026 km. from mean, weighted H=25.6.|
|NEODyS||1104||2077-2089||2||9.41e-07||-6.48||-6.54||0||NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2010/07/04.423 to 2010/07/10.277."|
|2010 MU112||JPL Sentry||1104||2033-2106||6||6.9e-08||-4.58||-4.73||0||JPL: "Analysis based on 20 observations spanning 10.301 days (2010-Jun-30.07214 to 2010-Jul-10.373014)." Diameter approximately 0.220 km. from mean, weighted H=20.9.|
|NEODyS||1104||2033-2090||10||1.0e-07||-4.44||-4.62||0||NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2010/06/30.073 to 2010/07/10.374."|
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 July '10
Times are UTC for when items were noted or added by The Tracking News.
|2358||Grabbed MPEC 2010-N50 - 2010 NT1 - see above|
Grabbed MPEC 2010-N51 - 2010 NU1 - see above
|1104||Noted that JPL Sentry has updated its 2010 MU112 risk assessment - see above|
Noted that NEODyS has updated its 2010 MU112 risk assessment - see above
Noted that JPL Sentry has updated its 2010 NH risk assessment - see above
Noted that NEODyS has updated its 2010 NH risk assessment - see above
Noted that JPL Sentry has removed 2010 NK as an impact risk - see above
Grabbed MPEC 2010-N49 - Daily Orbit Update - see above