Goldstone DSS-14 70m antenna. 
Credit: NASA/JPL.

The Los Angeles Times has an article from yesterday about repairs to NASA/JPL's Goldstone 70-meter dish antenna in southern California known as Deep Space Station 14, which, among many other tasks, is a critically important asteroid radar observatory. It reports that "Plans are underway for a system using much smaller dishes [in clusters to] eventually replace the antenna." Image credit: NASA/JPL Planetary Radar Group.

Contents  on 4 October '10


The latest A/CC news is available via framed access, RSS news feed RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.

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.

Radar Astrometry  on 4 October '10

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:

Data update noted at 1902 UTC when the database was dated 4 Oct.

NEOCP Activity  on 4 October '10

The MPC's NEO Confirmation Page has 5 listings: 5 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of ten 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 4 October '10

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-T23 - "19:06 UT" - 2010 TN4

MPEC 2010-T22 - "19:01 UT" - 2010 TM4

<< DOU on 4 Oct. '10 >>  MPEC 2010-T21 - "06:07 UT" - Daily Orbit Update

MPEC 2010-T20 - "05:34 UT" - 2010 TN3

MPEC 2010-T19 - "02:59 UT" - 2010 TM3

Observers  on 4 October '10

A total of 23 observing facilities appear in today's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 2 in MPEC 2010-T21 -- 162269, 137032
251Arecibo in Puerto Rico, 1 in radar -- 137032
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPECs 2010-T19, 2010-T20, 2010-T21, 2010-T22 & 2010-T23 -- 2010 TN4, 2010 TN3, 2010 TM4, 2010 TM3, 2010 SD13, 2010 RN80, 2010 RK43
I99Blanquita Obs. in Spain, 1 in MPEC 2010-T21 -- 2010 MR87
160Castelmartini Obs. in Italy, 12 in MPEC 2010-T21 -- 2010 RP80, 2010 MR87, 2010 LY63, 2000 TJ1, 2000 EY106, 251346, 249595, 243147, 237442, 19764, 143381, 138847
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2010-T21 -- 250162, 248083
470Ceccano Obs. in Italy, 1 in MPEC 2010-T19 -- 2010 TM3
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 5 in MPEC 2010-T21 -- 2010 SD13, 2010 RK64, 2010 PM10, 2010 MR87, 2010 LY63
151Eschenberg Obs. in Switzerland, 2 in MPEC 2010-T21 -- 2010 MF1, 2003 FC5
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2010-T19 -- 2010 TM3
240Herrenberg Obs. in Germany, 1 in MPEC 2010-T21 -- 11885
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2010-T19 -- 2010 TM3
704LINEAR in New Mexico, 1 in MPEC 2010-T23 -- 2010 TN4
J75La Sagra Obs. in Spain, 1 in MPEC 2010-T19 -- 2010 TM3
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2010-T19 & 2010-T20 -- 2010 TN3, 2010 TM3
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2010-T20, 2010-T21 & 2010-T22 -- 2010 TN3, 2010 TM4, 2010 RN80
A13Naef Obs. in Switzerland, 3 in MPECs 2010-T19 & 2010-T21 -- 2010 TM3, 2007 RU17, 2005 TB15
D90|H. Sato in Japan via RAS Obs. Moorook in South Australia, 1 in MPEC 2010-T21 -- 2010 QE2
473Remanzacco Obs. in Italy, 2 in MPECs 2010-T19 & 2010-T20 -- 2010 TN3, 2010 TM3
H36Sandlot Obs. in Kansas, 4 in MPECs 2010-T19, 2010-T20, 2010-T22 & 2010-T23 -- 2010 TN4, 2010 TN3, 2010 TM4, 2010 TM3
204Schiaparelli Obs. in Italy, 6 in MPEC 2010-T21 -- 2010 SF, 2010 SD, 2010 RT80, 2010 RG137, 2010 LR68, 2005 WK4
291Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2010-T21 -- 2010 SS16, 2010 SG13, 2010 SC, 2010 RW3, 2010 RB130
I19Tanti Obs. in Argentina, 6 in MPEC 2010-T21 -- 2010 SX11, 2010 SD13, 2010 RO82, 2010 RK43, 2010 RC130, 2010 OC127
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 4 October '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.





Notes for Today's Latest Risk Assessments
2010 TMNEODyS19022011-2077179.55e-09-3.94-4.050NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2010/10/02.450 to 2010/10/03.521."
2010 TKNEODyS15032018-204934.85e-09-7.93-8.000NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2010/10/02.321 to 2010/10/03.358."
2010 TDNEODyS15032051-208398.36e-06-5.88-6.170NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2010/10/01.207 to 2010/10/02.412."

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

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 4 October '10

Times are UTC for when items were noted or added by The Tracking News.

2008Grabbed MPEC 2010-T23 - 2010 TN4 - see above
1903Grabbed MPEC 2010-T22 - 2010 TM4 - see above
1902Noted that NEODyS has posted 2010 TM as an impact risk - see above
Noted Radar Astrometry database update - see above
1503Noted that NEODyS has posted 2010 TD as an impact risk - see above
Noted that NEODyS has posted 2010 TK as an impact risk - see above
Grabbed MPEC 2010-T21 - Daily Orbit Update - see above
0632Grabbed MPEC 2010-T20 - 2010 TN3 - see above
0507Grabbed MPEC 2010-T19 - 2010 TM3 - see above