This past week the University of Maryland reported that the EPOXI Deep Impact spacecraft on November 4th passed through "a storm of fluffy particles of water ice being spewed out by carbon dioxide jets coming from the rough ends of [103P/Hartley 2, while] a different process was causing water vapor to come out of the comet's mid-section." For more info, see this, this, and also this. Image credit: NASA/JPL/UM.
Contents on 20 November '10
- IAU Minor Planet Center
- Observers -- eight observers
- Impact Risk Monitoring -- one object
- Consolidated Risk Tables - the CRT page
Of 366 risk-listed objects, 48 have had news in the last 30 days. Updated at 1634 UTC on 20 Nov.
- Earth's Busy Neighborhood Traffic Report
Eight objects are known to be within ten LD of Earth today. Updated at 1949 UTC on 20 Nov.
- 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 20 November '10
The MPC's NEO Confirmation Page has 2 listings: 1 new, 1 updated
When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and one updated listing. Of these, one was a "one nighter." So far The Tracking News has counted a total of four 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 20 November '10
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
- K10VJ4W 2010 VW194 (small asteroid, arc=4 days, H=26.5 ~17m) from Astronomical Research Obs. Westfield (Nov. 19.33-36p3)
- Observations of recently (no longer) risk-listed objects
- K10VE0C 2010 VC140 (small asteroid, arc=4 days, H=27.9 ~9m) from ARO Westfield (Nov. 19.37-43p5)
- K10VD9Z 2010 VZ139 (small asteroid, arc=21 days, H=22.9 ~89m) from ARO Westfield (Nov. 19.18-19p3)
- Observations of small asteroids (H>22.0)
- K10W00B 2010 WB (arc=3 days, H=24.0 ~54m) from ARO Westfield (Nov. 19.27p4)
- K10V00U 2010 VU (arc=13 days, H=24.9 ~35m) from David Tholen's team on Mauna Kea (Nov. 14.41-42p3 at R=22.5-6)
- Observations of almost-small asteroids (21.7<H<=22.0)
- J98H49G 1998 HG49 (arc=4 opp, H=21.8 ~148m) from LINEAR (Nov. 19.38-42p7)
- Observations of other objects
- K10W00J 2010 WJ (arc=2 days, H=18.0 ~851m) from ARO Westfield (Nov. 19.27-29p4) and LINEAR (Nov. 19.40-44p4)
- K10W00H 2010 WH (arc=2 days, H=19.0 ~537m) from ARO Westfield (Nov. 19.30-31p4)
- K10VJ0Y 2010 VY190 (arc=4 days, H=19.0 ~537m) from ARO Westfield (Nov. 19.23-25p4)
- K10VD9Y 2010 VY139 (Q=4.095 AU, arc=5 days, H=20.5 ~269m) from ARO Westfield (Nov. 19.45-46p3)
- K10VD9K 2010 VK139 from the Siding Spring Survey (SSS) (Nov. 18.49p2)
- K10V72D 2010 VD72 (arc=9 days, H=21.5 ~170m) from SSS (Nov. 18.51p2)
- K10V71Z 2010 VZ71 from Desert Moon Obs. (Nov. 18.23-28p3)
- K10T55C 2010 TC55 (Q=4.607 AU, arc=38 days, H=20.3 ~295m) from ARO Westfield (Nov. 19.30p4)
- K10T54Y 2010 TY54 (arc=39 days, H=21.5 ~170m) from ARO Westfield (Nov. 19.31-32p3)
- K10T03M 2010 TM3 (arc=2 opp, H=20.6 ~257m) from LINEAR (Nov. 19.32-37p5)
- K10S13D 2010 SD13 (Q=4.300 AU, arc=54 days, H=18.8 ~589m) from ARO Westfield (Nov. 19.03-04p4) and Wishing Star Obs. (Nov. 19.99-01p3)
- K10RI1F 2010 RF181 (arc=69 days, H=20.7 ~245m) from Tzec Maun Obs. Mayhill (Nov. 19.48-50p4)
- K10R80N 2010 RN80 (arc=70 days, H=20.2 ~309m) from ISON-NM Obs. (Nov. 19.34p3)
- K10NB7W 2010 NW117 (arc=135 days, H=18.1 ~812m) from ARO Westfield (Nov. 19.01-02p3) and Wishing Star Obs. (Nov. 20.02-03p3)
- K10L97O 2010 LO97 (arc=160 days, H=18.8 ~589m) from LINEAR (Nov. 19.32-37p5) and Wishing Star Obs. (Nov. 20.12-14p3)
- K10L63Y 2010 LY63 from ARO Westfield (Nov. 19.10-12p5)
- K07VD8C 2007 VC138 (arc=2 opp, H=19.4 ~446m) from ARO Westfield (Nov. 19.12-16p4)
- K02V68E 2002 VE68 (arc=3 opp, H=20.5 ~269m) from ARO Westfield (Nov. 19.08-10p4)
- G9352 169352 2001 UY16 from Wishing Star Obs. (Nov. 20.05-06p3)
- B1253 111253 2001 XU10 from LINEAR (Nov. 19.45-50p5)
- 18882 18882 1999 YN4 from LINEAR (Nov. 19.39-44p5)
Observers on 20 November '10
Eight observers appear in today's MPEC.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 15 in MPEC 2010-W15 -- 2010 WJ, 2010 WH, 2010 WB, 2010 VZ139, 2010 VY190, 2010 VY139, 2010 VW194, 2010 VC140, 2010 TY54, 2010 TC55, 2010 SD13, 2010 NW117, 2010 LY63, 2007 VC138, 2002 VE68|
|448||Desert Moon Obs. in New Mexico, 1 in MPEC 2010-W15 -- 2010 VZ71|
|H15||ISON-NM Obs. in New Mexico, 1 in MPEC 2010-W15 -- 2010 RN80|
|704||LINEAR in New Mexico, 6 in MPEC 2010-W15 -- 2010 WJ, 2010 TM3, 2010 LO97, 1998 HG49, 18882, 111253|
|5682||David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-W15 -- 2010 VU|
|E12||Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2010-W15 -- 2010 VK139, 2010 VD72|
|H10||Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2010-W15 -- 2010 RF181|
|I15||Wishing Star Obs. in Rhode Island, 4 in MPEC 2010-W15 -- 2010 SD13, 2010 NW117, 2010 LO97, 169352|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 20 November '10
Notes for Today's Latest Risk Assessments
|2010 VW194||JPL Sentry||1633||2042-2108||22||4.4e-05||-5.37||-6.00||0||JPL: "Analysis based on 21 observations spanning 4.0143 days (2010-Nov-15.34197 to 2010-Nov-19.35628)." Diameter approximately 0.017 km. from mean, weighted H=26.5.|
|NEODyS||1633||2047-2089||17||2.82e-05||-5.51||-5.95||0||NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2010-11-15.343 to 2010-11-19.357."|
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 20 November '10
Times are UTC for when items were noted or added by The Tracking News.
|1633||Noted that JPL Sentry has updated its 2010 VW194 risk assessment - see above|
Noted that NEODyS has updated its 2010 VW194 risk assessment - see above
Grabbed MPEC 2010-W15 - Daily Orbit Update - see above