Contents  on 16 August '17

Asteroid/Comet Connection (A/CC) Resources:

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Traffic Report  on 16 August '17

Three objects reported inside ten LD

There are three Solar-System small bodies reported to be inside ten lunar distances (LD) of Earth today. 2017 PK25 departs from our ten-LD traffic reporting "bubble," traveling from 7.23 to 10.70 LD, while 2017 PD25 comes its closest to our planet this time around -- 9.62 LD at 0345 UTC, and newly announced 2017 PV25 enters the bubble, sliding in from 11.17 to 9.92 LD.

Earth passage I D ~Size Distance Today  Notes
2.22 LD Aug. 142017 PK25 30 m  7.23 to 10.70 LD exits ten LD
5.50 LD Aug. 222017 PV25 35 m  9.92 from 11.17 LD NEW, enters ten LD - MPEC
9.62 LD today2017 PD25 29 m  9.62 LD Earth closest at 0345 UTC - DOU
Approaching (sorted by 10-LD bubble entry date)
7.87 LD Sept. 291989 VB 389 m  < 10 LD Sept. 25
0.13 LD Oct. 122012 TC4 15 m  < 10 LD Oct. 5, intruder, radar/NHATS target, risk
8.5   LD Oct. 132005 TE49 15 m  < 10 LD Oct. 11, uncertainty +/- 10.1167 hours, NHATS target
5.77 LD Oct. 22171576 1999 VP11 645 m  < 10 LD Oct. 20

This report was generated at 1915 UTC with the discovery of 2017 PV25 (MPEC), and with the recovery of distant 2014 CU13 in today's DOU MPEC along with follow-up for 2017 PD25.



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 ten-plus years ago, but is not presently 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 16 August '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 2359 UTC when the database was dated 16 Aug.

NEOCP Activity  on 16 August '17

The MPC's NEO Confirmation Page has 90 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 90 objects listed. Of these, 42 were "one nighters." The Tracking News counted a total of 106 listings on the NEOCP on this day.

New MPECs  on 16 August '17

Minor Planet Electronic Circulars

There were ten MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 16 Aug. '17 >>  MPEC 2017-Q10 - "12:04 UT" - Daily Orbit Update


MPEC 2017-Q09 - "11:02 UT" - 2016 VU3


MPEC 2017-Q08 - "02:23 UT" - 2017 PV25


MPEC 2017-Q07 - "02:20 UT" - 2017 PU25


MPEC 2017-Q06 - "02:17 UT" - 2017 PT25


MPEC 2017-Q05 - "02:14 UT" - 2017 PS25


MPEC 2017-Q04 - "02:11 UT" - 2017 PR25


MPEC 2017-Q03 - "02:07 UT" - 2017 OR68


MPEC 2017-Q02 - "02:03 UT" - 2017 OQ68


MPEC 2017-Q01 - "02:00 UT" - 2017 OP68

Observers  on 16 August '17

A total of 36 observers appeared in this day's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2017-Q05 -- 2017 PS25
251Arecibo in Puerto Rico, 1 in radar -- C/1983 J1
H21Astronomical Research Obs. Westfield in Illinois, 11 in MPECs 2017-Q02, 2017-Q03, 2017-Q04, 2017-Q05, 2017-Q07 & 2017-Q10 -- 2017 PU25, 2017 PS25, 2017 PR25, 2017 OW67, 2017 OR68, 2017 OQ68, 2017 MX2, 2017 MD4, 2010 DB34, 2005 EJ94, 1989 UP
T05ATLAS Haleakala in Hawaii, 5 in MPECs 2017-Q05, 2017-Q06 & 2017-Q10 -- 2017 PT25, 2017 PS25, 90075, 68950, 480858
T08ATLAS Mauna Loa in Hawaii, 13 in MPECs 2017-Q06, 2017-Q07, 2017-Q08 & 2017-Q10 -- 2017 PV25, 2017 PU25, 2017 PT25, 2017 OD1, 2014 YC15, 96631, 88254, 68348, 480858, 190166, 138846, 5143, 3288
C77Bernezzo Obs. in Italy, 1 in MPEC 2017-Q06 -- 2017 PT25
160Castelmartini Obs. in Italy, 3 in MPECs 2017-Q06 & 2017-Q10 -- 2017 PT25, 422699, 265962
107Cavezzo Obs. in Italy, 5 in MPECs 2017-Q05, 2017-Q06, 2017-Q07, 2017-Q08 & 2017-Q10 -- 2017 PV25, 2017 PU25, 2017 PT25, 2017 PS25, 480858
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2017-Q01 -- 2017 OP68
I114Joseph Masiero in southern California via Gemini South Obs. in Chile, 1 in MPEC 2017-Q01 -- 2017 OP68
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 153415
J95Great Shefford Obs. in England, 3 in MPECs 2017-Q07, 2017-Q08 & 2017-Q10 -- 2017 PV25, 2017 PU25, 2017 PD25
Q62iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-Q01 -- 2017 OP68
W19Kalamazoo Obs. in Michigan, 1 in MPEC 2017-Q10 -- 1980
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2017-Q10 -- 152964
568_Marco Micheli on Mauna Kea in Hawaii, 2 in MPECs 2017-Q02 & 2017-Q03 -- 2017 OR68, 2017 OQ68
900Moriyama Obs. in Japan, 1 in MPEC 2017-Q05 -- 2017 PS25
K74Muensterschwarzach Obs. in Germany, 5 in MPEC 2017-Q10 -- 496018, 422699, 20460, 190166, 142561
J69North Obs. in England, 2 in MPECs 2017-Q06 & 2017-Q08 -- 2017 PV25, 2017 PT25
F51Pan-STARRS 1 (PS1) in Hawaii, 20 in MPECs 2017-Q02, 2017-Q03, 2017-Q04, 2017-Q08 & 2017-Q10 -- 2017 PV25, 2017 PR25, 2017 OR68, 2017 OQ68, 2017 OL68, 2017 OL1, 2017 OD1, 2017 MO7, 2015 XR128, 2015 RT83, 2015 PC228, 2015 KN120, 2010 VK188, 2006 KA40, 422699, 405212, 339492, 333888, 170891, 163191
W25RMS Obs., 1 in MPEC 2017-Q05 -- 2017 PS25
L04ROASTERR-1 in Romania, 1 in MPEC 2017-Q06 -- 2017 PT25
K61Rokycany Obs. in the Czech Republic, 2 in MPECs 2017-Q05 & 2017-Q07 -- 2017 PU25, 2017 PS25
247roving observer, 1 in MPEC 2017-Q06 -- 2017 PT25
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2017-Q05 -- 2017 PS25
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2017-Q04, 2017-Q05, 2017-Q06 & 2017-Q07 -- 2017 PU25, 2017 PT25, 2017 PS25, 2017 PR25
H36Sandlot Obs. in Kansas, 3 in MPECs 2017-Q05, 2017-Q06 & 2017-Q07 -- 2017 PU25, 2017 PT25, 2017 PS25
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2017-Q05 -- 2017 PS25
Y00SONEAR in Brazil, 1 in MPEC 2017-Q05 -- 2017 PS25
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2017-Q02, 2017-Q03 & 2017-Q10 -- 2017 OR68, 2017 OQ68, 2017 NR6, 2017 NK, 2017 MU8, 2014 CU13, 2011 UT20, 1989 UP
W34Squirrel Valley Obs. in North Carolina, 2 in MPEC 2017-Q10 -- 2017 PT25, 9202
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2017-Q05 -- 2017 PS25
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-Q09 -- 2016 VU3
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 2 in MPECs 2017-Q02 & 2017-Q03 -- 2017 OR68, 2017 OQ68
L01Visnjan Obs., 1 in MPEC 2017-Q05 -- 2017 PS25
C51WISE in Earth polar orbit, 1 in MPEC 2017-Q01 -- 2017 OP68
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 August '17

There was no risk monitoring news to report on this day.

Chronology  on 16 August '17

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

2359Noted Radar Astrometry database update - see above
1915Generated Traffic Report
1500Grabbed MPEC 2017-Q09 - 2016 VU3 - see above
Grabbed MPEC 2017-Q10 - Daily Orbit Update - see above
0431Grabbed MPEC 2017-Q01 - 2017 OP68 - see above
Grabbed MPEC 2017-Q02 - 2017 OQ68 - see above
Grabbed MPEC 2017-Q03 - 2017 OR68 - see above
Grabbed MPEC 2017-Q04 - 2017 PR25 - see above
Grabbed MPEC 2017-Q05 - 2017 PS25 - see above
Grabbed MPEC 2017-Q06 - 2017 PT25 - see above
Grabbed MPEC 2017-Q07 - 2017 PU25 - see above
Grabbed MPEC 2017-Q08 - 2017 PV25 - see above