There may have been another Jupiter impact, caught by amateur observer Masayuki Tachikawa in Japan around 1822 UT on August 20th. See Emily Lakdawalla's report for more info and links. Sky & Telescope reports no debris plume has been spotted during two subsequent Jupiter rotations, but corroboration has come from two other event observers in Japan. Image courtesy of M. Tachikawa (Ganymede at lower right, north is up).
Contents on 23 August '10
- IAU Minor Planet Center
- Observers -- five observing facilities
- Impact Risk Monitoring -- one object
- Consolidated Risk Tables - the CRT page
Of 321 risk-listed objects, 9 have had news in the last month. Updated at 1426 UTC.
- Earth's Busy Neighborhood Traffic Report
No objects are known to be within ten LD of Earth today. Updated at 1608 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 23 August '10
The MPC's NEO Confirmation Page is currently empty
The NEOCP is currently empty and hasn't been noted by The Tracking News as being active yet today (checked at 2358 UTC). It was last noted active yesterday.
New MPECs on 23 August '10
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- Observations of risk-listed objects
- K10P66R 2010 PR66 (Q=4.851 AU, arc=7 days, H=19.4 ~446m) from Astronomical Research Obs. Westfield (Aug. 22.19-21p3)
- Observations of recently (no longer) risk-listed objects
- K10P09M 2010 PM9 (arc=17 days, H=20.0 ~339m) from ARO Westfield (Aug. 22.29-30p4)
- Observations of small asteroids (H>22.0)
- K10P66S 2010 PS66 (arc=7 days, H=25.1 ~32m) from ARO Westfield (Aug. 22.27-28p3) and McDonald Obs. (Aug. 22.38p3)
- Observations of almost-small asteroids (21.7<H<=22.0)
- K10O00B 2010 OB (Q=4.386 AU, arc=35 days, H=21.9 ~141m) from ARO Westfield (Aug. 22.34-36p3)
- Observations of other objects
- K10P75Y 2010 PY75 (Q=4.523 AU, arc=7 days, H=18.5 ~676m) from ARO Westfield (Aug. 22.08-10p3)
- K10P22Y 2010 PY22 (arc=14 days, H=19.2 ~490m) from ARO Westfield (Aug. 22.22-24p4)
- K10P10M 2010 PM10 (arc=16 days, H=19.7 ~389m) from ARO Westfield (Aug. 22.27-28p3)
- K10P09L 2010 PL9 (arc=17 days, H=20.0 ~339m) from ARO Westfield (Aug. 22.16-18p4)
- K10P02P 2010 PP2 (arc=19 days, H=21.2 ~195m) from ARO Westfield (Aug. 22.18-21p5)
- K10OA1N 2010 ON101 (arc=22 days, H=20.5 ~269m) from ARO Westfield (Aug. 22.07-09p4)
- K10O00C 2010 OC (Q=4.710 AU, arc=34 days, H=19.0 ~537m) from ARO Westfield (Aug. 22.34-36p5)
- K10M01F 2010 MF1 (arc=65 days, H=19.6 ~407m) from Castelmartini Obs. (Aug. 21.87p3), ARO Westfield (Aug. 22.06-08p6), and Santa Mama Obs. (Aug. 22.88-90p5)
- K10L63Y 2010 LY63 (arc=70 days, H=17.8 ~933m) from Tanti Obs. (Aug. 22.05-06p4)
- K10F92O 2010 FO92 (arc=156 days, H=20.0 ~339m) from Castelmartini Obs. (Aug. 21.88p2) and Santa Mama Obs. (Aug. 22.84-87p5)
- K07VI9G 2007 VG189 (arc=2 opp, H=19.2 ~490m) from ARO Westfield (Aug. 22.11-12p4)
- K07L00L 2007 LL (arc=4 opp, H=20.4 ~282m) from ARO Westfield (Aug. 22.14-16p3)
- K06B06N 2006 BN6 (Q=4.353 AU, arc=5 opp, H=17.4 ~1.12 km) from ARO Westfield (Aug. 22.22-24p4)
- K01R11Y 2001 RY11 (arc=5 opp, H=17.2 ~1.23 km) from ARO Westfield (Aug. 22.13-15p4)
- F4029 154029 2002 CY46 from McDonald Obs. (Aug. 22.45-46p3)
- 04055 4055 Magellan (1985 DO2) from Santa Mama Obs. (Aug. 22.82-83p5)
Observers on 23 August '10
Five observing facilities appear in today's MPEC.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 16 in MPEC 2010-Q23 -- 2010 PY75, 2010 PY22, 2010 PS66, 2010 PR66, 2010 PP2, 2010 PM9, 2010 PM10, 2010 PL9, 2010 ON101, 2010 OC, 2010 OB, 2010 MF1, 2007 VG189, 2007 LL, 2006 BN6, 2001 RY11|
|160||Castelmartini Obs. in Italy, 2 in MPEC 2010-Q23 -- 2010 MF1, 2010 FO92|
|711||McDonald Obs. in Texas, 2 in MPEC 2010-Q23 -- 2010 PS66, 154029|
|B38||Santa Mama Obs. in Italy, 3 in MPEC 2010-Q23 -- 2010 MF1, 2010 FO92, 4055|
|I19||Tanti Obs. in Argentina, 1 in MPEC 2010-Q23 -- 2010 LY63|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 23 August '10
Notes for Today's Latest Risk Assessments
|2010 PR66||JPL Sentry||1426||2098-2107||2||2.6e-07||-4.04||-4.04||0||JPL: "Analysis based on 89 observations spanning 6.9460 days (2010-Aug-15.2648 to 2010-Aug-22.21081)." Diameter approximately 0.450 km. from mean, weighted H=19.4.|
|NEODyS||1426||R E M O V E D||-|
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 23 August '10
Times are UTC for when items were noted or added by The Tracking News.
|1426||Noted that JPL Sentry has updated its 2010 PR66 risk assessment - see above|
Noted that NEODyS has removed 2010 PR66 as an impact risk - see above
Grabbed MPEC 2010-Q23 - Daily Orbit Update - see above