Contents  on 6 August '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 6 August '17

One object reported inside ten LD

Today there is one visitor reported transiting an imaginary sphere with a radius of ten lunar distances (LD) from Earth's center. 2017 NB7 comes its closest to us on this passage -- 6.83 LD at 1044 UTC.

It will be awhile, but next known to be coming into the sphere are 1989 VB on September 25th, risk-listed radar/NHATS target intruder 2012 TC4 on October 5th, and 171576 1999 VP11 on October 20th, plus NHATS target 2005 TE49 may enter on or about October 11th.

Earth passage I D ~Size Distance Today  Notes
6.83 LD today2017 NB7 77 m  6.83 LD Earth closest at 1044 UTC
Approaching (sorted by 10-LD bubble entry date)
7.87 LD Sept. 291989 VB 389 m  < 10 LD Sept. 25, NEW
0.13 LD Oct. 122012 TC4 15 m  < 10 LD Oct. 5, NEW, intruder, radar/NHATS target, risk - MPEC, links
8.5   LD Oct. 132005 TE49 15 m  < 10 LD Oct. 11, NEW, uncertainty +/- 10.1167 hours, NHATS target
5.77 LD Oct. 22171576 1999 VP11 645 m  < 10 LD Oct. 20, NEW

This report was generated at 2040 UTC with the awaited recovery of 2012 TC4 (MPEC, links) and with astrometry from early last month in today's DOU MPEC for radar target 2017 CS. As we will be reporting on tiny intruder 2012 TC4 from now well into October, we need to add three other concurrent visitors. 1989 VB was recovered last month (DOU), and 171576 1999 VP11 has been tracked annually for several years now and was last reported in January while still distant, but tiny 2005 TE49 only had fourteen positions reported in a span of 3.70 days twelve years ago, thus has a JPL-calculated uncertainty of plus-or-minus 10.12 hours for passage at 8.5 LD on October 13th.



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.

NEOCP Activity  on 6 August '17

The MPC's NEO Confirmation Page has 46 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 46 objects listed. Of these, seventeen were "one nighters." So far The Tracking News has counted a total of 57 listings on the NEOCP 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 6 August '17

Minor Planet Electronic Circulars

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


MPEC 2017-P32 - "21:00 UT" - 2017 PS24


MPEC 2017-P31 - "20:57 UT" - 2017 OG68


MPEC 2017-P30 - "20:35 UT" - 2017 PR24


MPEC 2017-P29 - "20:33 UT" - 2017 PQ24


MPEC 2017-P28 - "20:29 UT" - 2017 OJ68


MPEC 2017-P27 - "20:27 UT" - 2017 OH68


MPEC 2017-P26 - "13:29 UT" - 2012 TC4

See links


<< DOU on 6 Aug. '17 >>  MPEC 2017-P25 - "12:03 UT" - Daily Orbit Update

Observers  on 6 August '17

A total of 25 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 23 in MPECs 2017-P25, 2017-P27, 2017-P28, 2017-P29, 2017-P30, 2017-P31 & 2017-P32 -- 2017 PS24, 2017 PR24, 2017 PQ24, 2017 OL7, 2017 OK19, 2017 OJ68, 2017 OH7, 2017 OH68, 2017 OG68, 2017 OD20, 2017 OC20, 2017 NO6, 2017 MY2, 2017 LP1, 2017 KV31, 2017 HV3, 2017 CS, 2013 PX6, 238456, 20460, 142040, 12538, 6063
T08ATLAS Mauna Loa in Hawaii, 10 in MPECs 2017-P25 & 2017-P30 -- 2017 PR24, 2017 OL1, 495959, 485652, 484517, 385580, 237805, 232368, 6050, 3752
160Castelmartini Obs. in Italy, 7 in MPEC 2017-P25 -- 2017 OT18, 2017 OL1, 2017 OF7, 2014 SR339, 496018, 304640, 1980
309&Marco Micheli via Cerro Paranal in Chile, 1 in MPEC 2017-P26 -- 2012 TC4
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2017-P27 -- 2017 OH68
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2017-P27 & 2017-P30 -- 2017 PR24, 2017 OH68
K88GINOP-KHK in Hungary, 1 in MPEC 2017-P27 -- 2017 OH68
J95Great Shefford Obs. in England, 3 in MPECs 2017-P25, 2017-P30 & 2017-P32 -- 2017 PS24, 2017 PR24, 2017 OJ7
585Kiev Comet Station in Ukraine, 1 in MPEC 2017-P27 -- 2017 OH68
Z21LCOGT Tenerife Aqawan A#1 in the Canary Islands, 1 in MPEC 2017-P30 -- 2017 PR24
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2017-P27 -- 2017 OH68
J69North Obs. in England, 3 in MPEC 2017-P25 -- 2017 GQ6, 304640, 143992
Z80Northolt Branch Obs. in England, 1 in MPEC 2017-P30 -- 2017 PR24
F51Pan-STARRS 1 (PS1) in Hawaii, 10 in MPECs 2017-P25, 2017-P27, 2017-P28, 2017-P29, 2017-P31 & 2017-P32 -- 2017 PS24, 2017 PQ24, 2017 OJ68, 2017 OH68, 2017 OG68, 411611, 27031, 250680, 16657, 152667
Z38Picoto Obs., 2 in MPEC 2017-P25 -- 6053, 1980
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2017-P31 -- 2017 OG68
W25RMS Obs., 7 in MPECs 2017-P25 & 2017-P30 -- 2017 PR24, 2017 OT18, 2017 NL6, 481394, 304640, 294739, 142561
L04ROASTERR-1 in Romania, 1 in MPEC 2017-P30 -- 2017 PR24
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2017-P27 -- 2017 OH68
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2017-P30 -- 2017 PR24
C95SATINO-1 in France, 1 in MPEC 2017-P30 -- 2017 PR24
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2017-P31 -- 2017 OG68
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2017-P25 -- 1980
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2017-P30 -- 2017 PR24
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 3 in MPECs 2017-P27, 2017-P28 & 2017-P31 -- 2017 OJ68, 2017 OH68, 2017 OG68
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 August '17

At last check (NEODyS at 2358 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 6 August '17

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

2120Generated Traffic Report
2101Grabbed MPEC 2017-P29 - 2017 PQ24 - see above
Grabbed MPEC 2017-P30 - 2017 PR24 - see above
Grabbed MPEC 2017-P31 - 2017 OG68 - see above
Grabbed MPEC 2017-P32 - 2017 PS24 - see above
2031Grabbed MPEC 2017-P27 - 2017 OH68 - see above
Grabbed MPEC 2017-P28 - 2017 OJ68 - see above
1500Grabbed MPEC 2017-P25 - Daily Orbit Update - see above
Grabbed MPEC 2017-P26 - 2012 TC4 - see above