NASA announced yesterday that a fourth satellite, which it calls "P4" but is officially designated S/2011 (134340) 1, was discovered within the Pluto system by the Hubble Space Telescope last month and confirmed this month. See IAU CBAT CBET 2769 for observation credits and more details. Illustration credit: NASA, ESA, and A. Feild/STScI.
Contents on 21 July '11
- IAU Minor Planet Center
- Observers -- seventeen observers
- Impact Risk Monitoring -- nothing to report
- Consolidated Risk Tables - the CRT page
Of 406 risk-listed objects, 10 have had news in the last 31 days. Updated at 1427 UTC on 21 July.
- Earth's Busy Neighborhood Traffic Report
Two objects are known to be within ten LD of Earth today. Updated at 1636 UTC on 21 July.
- 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 21 July '11
The MPC's NEO Confirmation Page has 1 listing
When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one object listed. This was a "one nighter." So far The Tracking News has counted a total of four listings on the NEOCP 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 21 July '11
Minor Planet Electronic Circulars
As of last check at 2359 UTC, there have been three MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2011-O13 time-stamped "00:03 UT" - 2011 OA - see below
- MPEC 2011-O14 time-stamped "07:07 UT" - Daily Orbit Update - see below
- MPEC 2011-O15 time-stamped "12:41 UT" - 2011 OB
MPEC 2011-O15 - "12:41 UT" - 2011 OB
- K11O00B 2011 OB (Earth MOID=3.9 LD, H=19.3 ~467m) from the Siding Spring Survey (SSS) (July 20.39-40p3, 20.45p3, 20.50p2, 21.37p1 & 21.44-46p2), Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (July 20.97-99p4), CEAMIG-REA (July 21.02p3), and Astronomical Research Obs. Westfield (July 21.10-11p3)
- Observations of small asteroids (H>22.0)
- K11M00L 2011 ML (arc=28 days, H=22.5 ~107m) from Holmes/CTIO (July 20.22-24p3)
- Observations of other objects
- K11O00A 2011 OA (arc=2 days, H=21.0 ~214m) from LINEAR (July 20.41-46p5)
- K11N00Z 2011 NZ (arc=13 days, H=20.8 ~234m) from Kevin Hills via RAS Obs. Moorook (July 19.52-54p5)
- K11N00Y 2011 NY (arc=15 days, H=20.6 ~257m) from Verona Obs. (July 20.87-88p4)
- K11L02L 2011 LL2 (arc=45 days, H=20.1 ~323m) from Holmes/CTIO (July 19.97-98p4)
- K11J29P 2011 JP29 (arc=75 days, H=19.0 ~537m) from Verona Obs. (July 20.84-86p4)
- K11J00K 2011 JK (arc=80 days, H=18.4 ~708m) from Holmes/CTIO (July 20.06-07p2)
- K11G62D 2011 GD62 (Q=5.245 AU, arc=100 days, H=17.1 ~1.29 km) from Holmes/CTIO (July 20.02-04p3)
- K11F02Y 2011 FY2 (Q=4.099 AU, arc=116 days, H=18.1 ~812m) from Holmes/CTIO (July 19.99-02p4)
- K08T10R 2008 TR10 (arc=2 opp, H=20.5 ~269m) from Verona Obs. (July 20.89-90p4)
- K07S06P 2007 SP6 (arc=3 opp, H=18.2 ~776m) from Holmes/CTIO (July 20.29-30p3)
- K06Y00D 2006 YD (Q=4.444 AU, arc=4 opp, H=17.4 ~1.12 km) from Blanquita Obs. (July 20.93-94p3)
- K03K16X 2003 KX16 (arc=3 opp, H=18.5 ~676m) from Holmes/CTIO (July 20.28-29p3)
- R7830 277830 2006 HR29 from Chabot Obs. (July 21.21-23p3)
- L9071 219071 1997 US9 from LINEAR (July 20.43-45p3)
- 53430 53430 1999 TY16 from Chabot Obs. (July 21.26-28p3)
- 20086 20086 1994 LW from Blanquita Obs. (July 20.96-97p3)
- 18172 18172 2000 QL7 from Holmes/CTIO (July 20.30-31p2)
- 07482 7482 1994 PC1 from Blanquita Obs. (July 20.99-01p3)
MPEC 2011-O13 - "00:03 UT" - 2011 OA
- K11O00A 2011 OA (H=21.0 ~214m) from LINEAR (July 19.34-36p3), Paus Obs. (July 19.92-93p2), Wiggins Obs. (July 20.28-30p4), Tim Lister via Faulkes Telescope North (July 20.36-37p9), Hidetaka Sato via RAS Obs. Mayhill (July 20.38-39p3), Schiaparelli Obs. (July 20.90-91p5), Farra d'Isonzo Obs. (July 20.90-92p3), Great Shefford Obs. (July 20.94p3), and New Millennium Obs. (July 20.99p4)
Observers on 21 July '11
Seventeen observers appear in today's MPECs.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2011-O15 -- 2011 OB|
|I99||Blanquita Obs. in Spain, 3 in MPEC 2011-O14 -- 2006 YD, 20086, 7482|
|I77||CEAMIG-REA in Brazil, 1 in MPEC 2011-O15 -- 2011 OB|
|807|||Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 9 in MPECs 2011-O14 & 2011-O15 -- 2011 OB, 2011 ML, 2011 LL2, 2011 JK, 2011 GD62, 2011 FY2, 2007 SP6, 2003 KX16, 18172|
|G58||Chabot Obs. in northern California, 2 in MPEC 2011-O14 -- 53430, 277830|
|595||Farra d'Isonzo Obs. in Italy, 1 in MPEC 2011-O13 -- 2011 OA|
|F65%||Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-O13 -- 2011 OA|
|J95||Great Shefford Obs. in England, 1 in MPEC 2011-O13 -- 2011 OA|
|704||LINEAR in New Mexico, 2 in MPECs 2011-O13 & 2011-O14 -- 2011 OA, 219071|
|A24||New Millennium Obs. in Italy, 1 in MPEC 2011-O13 -- 2011 OA|
|B49||Paus Obs. in Spain, 1 in MPEC 2011-O13 -- 2011 OA|
|H06|||Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-O13 -- 2011 OA|
|D90`||Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2011-O14 -- 2011 NZ|
|204||Schiaparelli Obs. in Italy, 1 in MPEC 2011-O13 -- 2011 OA|
|E12||Siding Spring Survey in New South Wales, 1 in MPEC 2011-O15 -- 2011 OB|
|A48||Verona Obs. in Italy, 3 in MPEC 2011-O14 -- 2011 NY, 2011 JP29, 2008 TR10|
|718||Wiggins Obs. in Utah, 1 in MPEC 2011-O13 -- 2011 OA|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 21 July '11
At last check (NEODyS and JPL at 2359 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.