Contents  on 13 June '17

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 13 June '17

One object reported inside ten LD

One transient natural object is reported to be less than ten lunar distances (LD) from Earth today. Risk-listed 2017 LD moves away from 8.59 to 9.59 LD. Next up, radar target 441987 2010 NY65 arrives inside ten LD on June 22nd and NHATS target 2017 BS5 comes within on July 16th.

This report was generated at 1745 UTC with follow-up in today's DOU MPEC for departed radar targets 2017 CS and 418094 2007 WV4 and for distant 484402 2007 XH16.

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. "Distant" is used here to describe an object that has come within ten LD since A/CC began these traffic reports (2007) but is not now so close. 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 13 June '17

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 2359 UTC when the database was dated 13 June

NEOCP Activity  on 13 June '17

The MPC's NEO Confirmation Page has 8 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eight objects listed. Of these, two were "one nighters." So far The Tracking News has counted a total of nine listings on the NEOCP today.

New MPECs  on 13 June '17

Minor Planet Electronic Circulars

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

<< DOU on 13 June '17 >>  MPEC 2017-L66 - "11:59 UT" - Daily Orbit Update

MPEC 2017-L65 - "10:58 UT" - 2015 UR51

Observers  on 13 June '17

A total of 21 observers appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 1566
H21Astronomical Research Obs. Westfield in Illinois, 12 in MPEC 2017-L66 -- 2017 KP34, 2017 FD65, 2017 CS, 66391, 190166, 142040, 11398, 106589, 7888, 6063, 2102, 1980
T05ATLAS Haleakala in Hawaii, 2 in MPEC 2017-L66 -- 484517, 3352
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2017-L66 -- 11398
160Castelmartini Obs. in Italy, 23 in MPEC 2017-L66 -- 2017 HY50, 2017 CS, 2011 ED78, 68348, 66391, 495331, 494706, 484402, 481532, 418094, 416584, 190166, 163696, 142561, 142040, 11398, 106589, 100926, 7888, 6063, 2329, 2102, 1917
703Catalina Sky Survey (CSS) in Arizona, 7 in MPEC 2017-L66 -- 2011 ED78, 484402, 483560, 405427, 163696, 7888, 1917
006Fabra Obs. in Spain, 1 in MPEC 2017-L66 -- 66391
J95Great Shefford Obs. in England, 2 in MPEC 2017-L66 -- 2017 LP, 2017 LF
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 2 in MPEC 2017-L66 -- 2017 KU4, 2017 KS34
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2017-L66 -- 2017 KU34
W87LCOGT Cerro Tololo C in Chile, 1 in MPEC 2017-L66 -- 2017 KU34
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2017-L66 -- 1036
W92MASTER OAFA Obs., 1 in MPEC 2017-L66 -- 1036
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPEC 2017-L66 -- 2017 KV4, 2017 HW48, 495102, 418416, 162269, 152931, 136923, 3908, 1980
Z80Northolt Branch Obs. in England, 5 in MPEC 2017-L66 -- 2017 CS, 66391, 190166, 142040, 11398
W881Tony Evans in Portugal via Chile Obs. in Chile, 1 in MPEC 2017-L66 -- 2017 KR34
W885M. Kumrucu-Lohmiller in Massachusetts via Chile Obs. in Chile, 1 in MPEC 2017-L66 -- 2007 XJ16
691Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2017-L66 -- 2017 HT2, 2017 FQ64, 2017 FP64, 2017 BL6
291Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2017-L66 -- 2017 LF, 2017 KJ5, 2010 VB1, 2004 MD6
926Tenagra II Obs. in Arizona, 4 in MPEC 2017-L66 -- 2017 KR34, 2017 KE5, 2017 HN3, 2016 YU8
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-L65 -- 2015 UR51
C51WISE in Earth polar orbit, 1 in MPEC 2017-L66 -- 2017 KO31
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 June '17

At last check (NEODyS at 2359 UTC) there was no risk monitoring news to report yet today. 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 13 June '17

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

2359Noted Radar Astrometry database update - see above
1745Generated Traffic Report
1542Grabbed MPEC 2017-L65 - 2015 UR51 - see above
Grabbed MPEC 2017-L66 - Daily Orbit Update - see above