Scott Sheppard and Chad Trujillo this week reported their discovery of the first known trailing Neptune Trojan, 2008 LC18, using the Japanense Subaru 8.3-meter telescope on Mauna Kea to watch for such objects traversing a dark dusty area against the bright galactic background. They previously discovered half of the six known Neptune leading Trojans, and predict that there are more large bodies in this L4/L5 population than in the Main Asteroid Belt. Image courtesy of the discoverers.
Contents on 14 August '10
- IAU Minor Planet Center
- Observers -- eleven observing facilities
- Impact Risk Monitoring -- nothing to report
- Consolidated Risk Tables - the CRT page
Of 321 risk-listed objects, 11 have had news in the last month. Updated at 1500 UTC.
- Earth's Busy Neighborhood Traffic Report
No objects are known to be within ten LD of Earth today. Updated at 0039 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 14 August '10
The MPC's NEO Confirmation Page has 6 listings: 3 new, 3 updated
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and three updated listings. Of these, one was a "one nighter." So far The Tracking News has counted a total of eight 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 14 August '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-P61 time-stamped "06:11 UT" - Daily Orbit Update - see below
- MPEC 2010-P62 time-stamped "18:29 UT" - 2010 PW58
MPEC 2010-P62 - "18:29 UT" - 2010 PW58
- K10P58W 2010 PW58 (Earth MOID=8.5 LD, H=21.1 ~204m) was discovered at 1946 UT on 5 Aug. by WISE, which observed it at Aug. 5.82p1, 5.96p1, 6.09p1, 6.22p1, 6.29p1, 6.35p1, 6.42p1, 6.49p1, 6.55p1, and 6.68p1. The discovery was confirmed by the Siding Spring Survey (SSS) (Aug. 13.41p2 & 14.39p1).
- Observations of recently (no longer) risk-listed objects
- K10P09M 2010 PM9 (arc=9 days, H=20.0 ~339m) from Monte Baldo Obs. (Aug. 13.90-91p3)
- K10N02B 2010 NB2 (arc=34 days, H=20.3 ~295m) from Astronomical Research Obs. Westfield (Aug. 13.11p1 at V=22.7 & 13.16-19p3 at V=22.6-23.1)
- Observations of small asteroids (H>22.0)
- K10P57D 2010 PD57 (arc=3 days, H=22.6 ~102m) from the Spacewatch 1.8m telescope (Aug. 13.29-30p3)
- K00A06A 2000 AA6 (arc=2 opp, H=22.1 ~129m) from LINEAR (Aug. 13.29-33p4)
- Observations of other objects
- K10P22Y 2010 PY22 (arc=6 days, H=19.1 ~513m) from Frasso Sabino Obs. (Aug. 11.93-94p4), ARO Westfield (Aug. 13.18-19p4), and Monte Baldo Obs. (Aug. 13.86-87p5)
- K10OA1N 2010 ON101 (arc=14 days, H=20.5 ~269m) from Wishing Star Obs. (Aug. 14.03-04p3)
- K10OA1D 2010 OD101 (arc=21 days, H=21.0 ~214m) from ARO Westfield (Aug. 13.27-29p4)
- K10OA1C 2010 OC101 (arc=21 days, H=21.0 ~214m) from ARO Westfield (Aug. 13.13-16p3)
- K10OA1B 2010 OB101 (arc=26 days, H=20.5 ~269m) from Spacewatch 1.8m (Aug. 13.30-31p3)
- K10NB7W 2010 NW117 (arc=36 days, H=18.2 ~776m) from LINEAR (Aug. 13.21-26p3)
- K10N01Z 2010 NZ1 (arc=35 days, H=19.7 ~389m) from ARO Westfield (Aug. 13.32-35p3 at V=22.1-2)
- K10M01F 2010 MF1 (arc=56 days, H=19.6 ~407m) from Castelmartini Obs. (Aug. 13.83p4)
- K10KB7Z 2010 KZ117 (arc=88 days, H=18.6 ~645m) from ARO Westfield (Aug. 13.20-21p4) and Castelmartini Obs. (Aug. 13.88p3)
- K10G65H 2010 GH65 (Q=4.363 AU, arc=125 days, H=18.6 ~645m) from Spacewatch 1.8m (Aug. 13.47-48p2)
- K10G07S 2010 GS7 (Q=4.477 AU, arc=128 days, H=21.5 ~170m) from ARO Westfield (Aug. 13.28-31p4 at V=21.9-22.1)
- K10F92O 2010 FO92 (arc=147 days, H=20.0 ~339m) from Castelmartini Obs. (Aug. 13.85p4) and Wishing Star Obs. (Aug. 14.06p3)
- K09C05Q 2009 CQ5 (arc=2 opp, H=17.6 ~1.02 km) from Santa Mama Obs. (Aug. 13.80-83p7)
- K05V05T 2005 VT5 (arc=3 opp, H=19.2 ~490m) from ARO Westfield (Aug. 13.30-33p3 at V=21.6-22.2)
- K04XD0M 2004 XM130 (arc=4 opp, H=17.0 ~1.35 km) from ARO Westfield (Aug. 13.20-25p3 at V=21.8-22.1)
- K04F31X 2004 FX31 (arc=5 opp, H=17.5 ~1.07 km) from Wishing Star Obs. (Aug. 14.09-12p3)
- K02V69P 2002 VP69 (arc=5 opp, H=17.9 ~891m) from ARO Westfield (Aug. 13.22-26p3 at V=22.0-22.3)
- K02N71E 2002 NE71 (arc=2 opp, H=19.4 ~446m) from Frasso Sabino Obs. (Aug. 11.95p3)
- K00P27Q 2000 PQ27 (arc=2 opp, H=19.7 ~389m) from the Spacewatch 0.9m telescope (Aug. 13.29-33p3)
- G1998 161998 1988 PA from Castelmartini Obs. (Aug. 13.86-87p3)
- 04034 4034 1986 PA from LINEAR (Aug. 13.22-25p3)
Observers on 14 August '10
Eleven observing facilities appear in today's MPECs.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 10 in MPEC 2010-P61 -- 2010 PY22, 2010 OD101, 2010 OC101, 2010 NZ1, 2010 NB2, 2010 KZ117, 2010 GS7, 2005 VT5, 2004 XM130, 2002 VP69|
|160||Castelmartini Obs. in Italy, 4 in MPEC 2010-P61 -- 2010 MF1, 2010 KZ117, 2010 FO92, 161998|
|157||Frasso Sabino Obs. in Italy, 2 in MPEC 2010-P61 -- 2010 PY22, 2002 NE71|
|704||LINEAR in New Mexico, 3 in MPEC 2010-P61 -- 2010 NW117, 2000 AA6, 4034|
|A99||Monte Baldo Obs. in Italy, 2 in MPEC 2010-P61 -- 2010 PY22, 2010 PM9|
|B38||Santa Mama Obs. in Italy, 1 in MPEC 2010-P61 -- 2009 CQ5|
|E12||Siding Spring Survey in New South Wales, 1 in MPEC 2010-P62 -- 2010 PW58|
|691||Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2010-P61 -- 2000 PQ27|
|291||Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2010-P61 -- 2010 PD57, 2010 OB101, 2010 GH65|
|C51||WISE in Earth polar orbit, 1 in MPEC 2010-P62 -- 2010 PW58|
|I15||Wishing Star Obs. in Rhode Island, 3 in MPEC 2010-P61 -- 2010 ON101, 2010 FO92, 2004 FX31|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 14 August '10
At last check (NEODyS and JPL at 2358 UTC) there was no risk monitoring news to report yet today. Visit the CRT to view activity in the last four weeks and our ephemerides page for a complete list of risk-rated objects under current observation or having recent news.