Contents  on 12 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 12 July '17

Three objects reported inside ten LD

Three Solar-System small bodies are known to be inside ten lunar distances (LD) of our home world today. 2017 NK2 is outbound from 3.52 to 4.57 LD and 2017 MR8 is inbound from 5.81 to 4.62 LD, while 2017 MC4 departs from our ten-LD traffic reporting "bubble," traveling from 8.72 to 11.72 LD. Coming into the neighborhood next, NHATS target 2017 BS5 enters the bubble on July 16th.

This report was generated at 1848 UTC with follow-up in today's DOU MPEC for departed radar target 2017 CS and observation of 2017 MF from June. And first follow-up for NHATS target 2016 UB107 was reported late yesterday as radar from last November, doubling that object's observation arc from 17 to 35 days.

Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting on transient natural objects that approach the actually significant gravitational sphere of influence (SOI), which has a radius of about 2.41 LD from Earth's center. This puts a focus on some of the most important and very best NEO observation work, representative of the much larger NEO discovery and tracking effort. Object distances are derived by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

Radar Astrometry  on 12 July '17

Radar observation of two 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 2127 UTC when the database was dated 12 July

NEOCP Activity  on 12 July '17

The MPC's NEO Confirmation Page has 13 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had thirteen objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of eighteen listings on the NEOCP today.

New MPECs  on 12 July '17

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 12 July '17 >>  MPEC 2017-N69 - "11:59 UT" - Daily Orbit Update

Observers  on 12 July '17

Fifteen observers appear in today's MPEC.

CodeObserver / observatory
251Arecibo in Puerto Rico, 2 in radar -- 2016 VY1, 152685
H21Astronomical Research Obs. Westfield in Illinois, 10 in MPEC 2017-N69 -- 2017 NH, 2017 MC, 2017 GQ6, 2017 BM31, 66391, 190166, 138846, 11398, 2329, 1980
T05ATLAS Haleakala in Hawaii, 12 in MPEC 2017-N69 -- 2017 NH, 2008 MH1, 68348, 485652, 20460, 163696, 143992, 138846, 6053, 5143, 3752, 1980
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2017-N69 -- 66391
C77Bernezzo Obs. in Italy, 1 in MPEC 2017-N69 -- 2017 BM31
160Castelmartini Obs. in Italy, 12 in MPEC 2017-N69 -- 2017 MB1, 2017 CS, 66146, 53319, 416584, 366733, 294739, 232368, 141670, 8567, 7977, 5660
P93JAXA Space Tracking & Communication Center (JAXA STCC), 5 in MPEC 2017-N69 -- 2017 MF, 66391, 190166, 6063, 2102
118Modra Obs. in Slovakia, 1 in MPEC 2017-N69 -- 2017 BM31
C23Olmen Obs. in Belgium, 1 in MPEC 2017-N69 -- 190166
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2017-N69 -- 2017 NH
A53Peschiera del Garda Obs. in Italy, 3 in MPEC 2017-N69 -- 2017 NH, 2017 CS, 2017 BM31
K14Sencelles Obs. in Spain, 1 in MPEC 2017-N69 -- 2017 BM31
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2017-N69 -- 2001 HB
W33Transit Dreams Obs., 1 in MPEC 2017-N69 -- 2329
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2017-N69 -- 2017 FL127, 2014 HR184
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 July '17

At last check (NEODyS at 2358 UTC) there was no risk monitoring news to report yet today, except that observation of one risk-listed object has been reported (see today's DOU MPEC above). 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.

Chronology  on 12 July '17

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

2127Noted Radar Astrometry database update - see above
1848Generated Traffic Report
1248Grabbed MPEC 2017-N69 - Daily Orbit Update - see above