Contents  on 1 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 1 August '17

Two objects reported inside ten LD

Two Solar-System small bodies are reported moving within ten lunar distances (LD) of Earth today. Risk-listed 2017 OE7 is outbound from 7.17 to 8.02 LD and 2017 NB7 is inbound from 9.96 to 9.04 LD.

This report was generated at 1941 UTC with the discovery of already departed 2017 OZ19 (MPEC), which flew past us at 4.18 LD on July 17th, and with first follow-up for departed objects 2017 OP1 and 2017 NC in today's DOU MPEC along with continuing follow-up for risk-listed 2017 OM1 and astrometry from early July for 2017 NB.

Editor's note: We have had difficulty today with transferring files to this Web site, which was also apparently off line earlier.

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 1 August '17

The MPC's NEO Confirmation Page has 80 listings

When last checked at 2355 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 80 objects listed. Of these, 47 were "one nighters." So far The Tracking News has counted a total of 98 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 1 August '17

Minor Planet Electronic Circulars

As of last check at 2355 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2017-P07 - "14:17 UT" - 2017 OE20

MPEC 2017-P06 - "14:14 UT" - 2017 OD20

MPEC 2017-P05 - "14:10 UT" - 2017 OC20

MPEC 2017-P04 - "14:07 UT" - 2017 OB20

MPEC 2017-P03 - "14:03 UT" - 2017 OA20

MPEC 2017-P02 - "13:59 UT" - 2017 OZ19

<< DOU on 1 Aug. '17 >>  MPEC 2017-P01 - "12:03 UT" - Daily Orbit Update

Observers  on 1 August '17

A total of 31 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 6 in MPECs 2017-P02, 2017-P03, 2017-P04, 2017-P05, 2017-P06 & 2017-P07 -- 2017 OZ19, 2017 OE20, 2017 OD20, 2017 OC20, 2017 OB20, 2017 OA20
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2017-P01 -- 90075
L00East Rome Obs., 1 in MPEC 2017-P01 -- 68950
734Farpoint Obs. in Kansas, 1 in MPEC 2017-P06 -- 2017 OD20
K83Forti Obs., 5 in MPEC 2017-P01 -- 2017 OL1, 66146, 496018, 143992, 6053
203GiaGa Obs. in Italy, 3 in MPEC 2017-P01 -- 2017 OF7, 304640, 136818
K88GINOP-KHK in Hungary, 1 in MPEC 2017-P06 -- 2017 OD20
511Haute Provence Obs. in Germany, 1 in MPEC 2017-P01 -- 2017 OT18
196Homburg-Erbach Obs. in Germany, 6 in MPEC 2017-P01 -- 2009 VY25, 471241, 347813, 141354, 7350, 1866
W19Kalamazoo Obs. in Michigan, 1 in MPEC 2017-P01 -- 138925
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2017-P03 -- 2017 OA20
K91LCOGT Sutherland A in South Africa, 1 in MPEC 2017-P03 -- 2017 OA20
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2017-P01 -- 2329
568_Marco Micheli on Mauna Kea in Hawaii, 3 in MPECs 2017-P02, 2017-P03 & 2017-P04 -- 2017 OZ19, 2017 OB20, 2017 OA20
C47Nonndorf Obs. in Austria, 1 in MPEC 2017-P01 -- 2017 OL1
J69North Obs. in England, 1 in MPEC 2017-P01 -- 2017 OL1
Z80Northolt Branch Obs. in England, 6 in MPEC 2017-P01 -- 2017 OL1, 2017 GQ6, 2009 BF, 496018, 190166, 138925
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2017-P01 -- 138925
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPECs 2017-P02, 2017-P03, 2017-P04, 2017-P05, 2017-P06 & 2017-P07 -- 2017 OZ19, 2017 OE20, 2017 OD20, 2017 OC20, 2017 OB20, 2017 OA20
K19PASTIS Obs. in France, 1 in MPEC 2017-P01 -- 138925
Z38Picoto Obs., 1 in MPEC 2017-P01 -- 496018
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2017-P07 -- 2017 OE20
L04ROASTERR-1 in Romania, 1 in MPEC 2017-P01 -- 2017 OL1
204Schiaparelli Obs. in Italy, 19 in MPEC 2017-P01 -- 2017 OM1, 2017 OL1, 2017 OG1, 2017 OD1, 2017 NS5, 2017 NC, 2017 NB, 2017 MY2, 2017 MV7, 2017 MT8, 2017 MG3, 2017 MC5, 2017 BS6, 2016 CL32, 2011 NP, 2011 CC22, 2009 BF, 495959, 494975
Y28Sertao de Itaparica Obs. in Brazil, 1 in MPEC 2017-P01 -- 2017 OP1
G40!M. Kumrucu-Lohmiller in Massachusetts via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-P01 -- 2017 OF7
G403Tony Evans in Portugal via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-P01 -- 2017 OH7
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2017-P07 -- 2017 OE20
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2017-P01 -- 138925
W34Squirrel Valley Obs. in North Carolina, 3 in MPEC 2017-P01 -- 2017 OR19, 106589, 7336
W33Transit Dreams Obs., 3 in MPEC 2017-P01 -- 90075, 138925, 6053
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-P01 -- 2005 VL1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 August '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2355 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
2017 OM1JPL Sentry15302084-211352.1156158e-06-4.95-5.210JPL: Computed at 08:10 today Pacific time based on 135 observations spanning 2.5921 days (2017-Jul-22.50692 to 2017-Jul-25.098999). Diameter approximately 0.073 km. from weighted mean H=23.33.

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 1 August '17

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

1941Generated Traffic Report
1530Noted that JPL Sentry has updated its 2017 OM1 risk assessment - see above
1500Grabbed MPEC 2017-P01 - Daily Orbit Update - see above
Grabbed MPEC 2017-P02 - 2017 OZ19 - see above
Grabbed MPEC 2017-P03 - 2017 OA20 - see above
Grabbed MPEC 2017-P04 - 2017 OB20 - see above
Grabbed MPEC 2017-P05 - 2017 OC20 - see above
Grabbed MPEC 2017-P06 - 2017 OD20 - see above
Grabbed MPEC 2017-P07 - 2017 OE20 - see above