Contents  on 8 July '17

NOTE:  These A/CC news pages will update less often for an extended period. All discoveries and observing credits will be reported, but we may miss some interim impact risk assessments and undercount NEOCP efforts, and there may be some gaps in our traffic reporting for Earth's Busy Neighborhood.

Asteroid/Comet Connection (A/CC) Resources:

The latest A/CC news is available via framed access, RSS news feed RSS news feed, or redirection.

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. To keep track of what's new each day, watch the Chronology section.

Traffic Report  on 8 July '17

Report not compiled

(Traffic Report not compiled for this day. Click on right arrow immediately above for tomorrow's report.)

Radar Astrometry  on 8 July '17

Radar observation of seven objects

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

Data update noted at 0014 UTC when the database was dated 7 July

NEOCP Activity  on 8 July '17

The MPC's NEO Confirmation Page has 30 listings

When last checked at 2331 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 30 objects listed. Of these, 23 were "one nighters." So far The Tracking News has counted a total of 32 listings on the NEOCP today.

New MPECs  on 8 July '17

Minor Planet Electronic Circulars

As of last check at 2331 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 8 July '17 >>  MPEC 2017-N60 - "12:01 UT" - Daily Orbit Update

Observers  on 8 July '17

Eight observers appear in today's MPEC.

CodeObserver / observatory
251Arecibo in Puerto Rico, 7 in radar -- 2016 VX1, 2016 TG55, 2016 TB57, 2016 RE34, 2016 RD34, 477162, 250458
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2017-N60 -- 2017 MM7
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2017-N60 -- 2008 MH1
160Castelmartini Obs. in Italy, 12 in MPEC 2017-N60 -- 2017 MB1, 2017 CS, 68950, 416584, 366733, 294739, 232368, 20460, 142561, 141056, 136818, 106589
203GiaGa Obs. in Italy, 5 in MPEC 2017-N60 -- 2017 NH, 2017 MC4, 2017 BM31, 190166, 142040
H15ISON New Mexico Obs. in New Mexico, 2 in MPEC 2017-N60 -- 141018, 138925
K38M57 Obs. in Italy, 2 in MPEC 2017-N60 -- 2017 NH, 2017 MC4
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-N60 -- 469219
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 July '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2331 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 NASA/JPL Sentry and NEODyS CLOMON2 risk pages.





Notes for Today's Latest Risk Assessments
2016 RD34JPL Sentry00142051-2093350.00619652907-3.60-3.750JPL: Computed at 16:20 July 7th Pacific time based on 80 observations spanning 101.90 days (2016-Sep-11.42997 to 2016-Dec-22.325591) including radar (1 Doppler).. Diameter approximately 0.012 km. from weighted mean H=27.27.

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale (next 100 years)

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 8 July '17

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

1352Grabbed MPEC 2017-N60 - Daily Orbit Update - see above
0014Noted that JPL Sentry has updated its 2016 RD34 risk assessment - see above
Noted Radar Astrometry database update - see above