Contents on 17 May '11
- IAU Minor Planet Center
- Observers -- three observers
- Impact Risk Monitoring -- one object
- Consolidated Risk Tables - the CRT page
Of 402 risk-listed objects, 16 have had news in the last 31 days. Updated at 1700 UTC on 17 May.
- Earth's Busy Neighborhood Traffic Report
No objects are known to be within ten LD of Earth today. Updated at 1735 UTC on 17 May.
- 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 17 May '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. So far The Tracking News has counted a total of six 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 17 May '11
Minor Planet Electronic Circulars
As of last check at 2359 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
- K11H05O 2011 HO5 (small asteroid, arc=19 days, H=24.3 ~47m) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (May 16.17-18p5)
- Observations of recently (no longer) risk-listed objects
- K11H00T 2011 HT (almost small, arc=21 days, H=21.9 ~141m) from Holmes/CTIO (May 16.28p3)
- Observations of small asteroids (H>22.0)
- K11H00H 2011 HH (arc=23 days, H=25.3 ~29m) from Holmes/CTIO (May 16.29-31p4)
- Observations of almost-small asteroids (21.7<H<=22.0)
- K11G00C 2011 GC (arc=45 days, H=22.0 ~135m) from Holmes/CTIO (May 16.34-35p5)
- Observations of other objects
- K11H07L 2011 HL7 (arc=18 days, H=20.5 ~269m) from Holmes/CTIO (May 16.26p4)
- K11H00Q 2011 HQ (arc=22 days, H=20.9 ~224m) from Holmes/CTIO (May 16.19-20p5)
- K11G65Q 2011 GQ65 (arc=32 days, H=18.8 ~589m) from Holmes/CTIO (May 16.32-33p5)
- K11F29B 2011 FB29 (arc=47 days, H=20.2 ~309m) from Holmes/CTIO (May 16.36-37p5)
- I8174 188174 2002 JC from LINEAR (May 15.29-33p5)
- G2463 162463 2000 JH5 from San Vito Obs. (May 16.86-87p3)
- 23187 23187 2000 PN9 from LINEAR (May 14.21-24p4)
- 08176 8176 1991 WA from LINEAR (May 15.19-23p5)
Observers on 17 May '11
Three observers appear in today's MPEC.
|Code||Observer / observatory|
|807|||Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 8 in MPEC 2011-K02 -- 2011 HT, 2011 HQ, 2011 HO5, 2011 HL7, 2011 HH, 2011 GQ65, 2011 GC, 2011 FB29|
|704||LINEAR in New Mexico, 3 in MPEC 2011-K02 -- 23187, 188174, 8176|
|233||San Vito Obs. in Italy, 1 in MPEC 2011-K02 -- 162463|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 17 May '11
Notes for Today's Latest Risk Assessments
|2011 HO5||JPL Sentry||1700||2090||1||2.0e-07||-6.69||-6.69||0||JPL: "Analysis based on 68 observations spanning 18.778 days (2011-Apr-27.39956 to 2011-May-16.1773)." Diameter approximately 0.047 km. from mean, weighted H=24.3.|
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.