Contents  on 30 July '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 30 July '17

Two objects reported inside ten LD

There are two transient natural objects known to be within ten lunar distances (LD) of Earth today. Risk-listed 2017 OE7 is outbound from 5.69 to 6.39 LD and NHATS target 2017 BS5 from 8.62 to 9.83 LD. Coming around the Sun next, 2017 NB7 enters the ten LD space tomorrow.

This report was generated at 1810 UTC with follow-up in today's DOU MPEC for 2017 OE7 and departed radar target 2017 CS.



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 30 July '17

The MPC's NEO Confirmation Page has 91 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 91 objects listed. Of these, 43 were "one nighters." So far The Tracking News has counted a total of 104 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 30 July '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-O73 - "13:58 UT" - 2002 ET11


<< DOU on 30 July '17 >>  MPEC 2017-O72 - "11:59 UT" - Daily Orbit Update


MPEC 2017-O71 - "00:45 UT" - 2017 OX18


MPEC 2017-O70 - "00:42 UT" - 2017 OW18


MPEC 2017-O69 - "00:39 UT" - 2017 OV18


MPEC 2017-O68 - "00:36 UT" - 2017 OU18


MPEC 2017-O67 - "00:33 UT" - 2017 OT18


MPEC 2017-O66 - "00:31 UT" - 2017 OS18

Observers  on 30 July '17

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
L33Ananjev Obs. in Ukraine, 1 in MPEC 2017-O67 -- 2017 OT18
E23Arcadia Obs. in New South Wales, 1 in MPEC 2017-O67 -- 2017 OT18
H21Astronomical Research Obs. Westfield in Illinois, 13 in MPECs 2017-O66, 2017-O67, 2017-O69, 2017-O71 & 2017-O72 -- 2017 OX18, 2017 OV18, 2017 OT18, 2017 OS18, 2017 OF1, 2017 OD1, 2017 OD, 2017 NU6, 2017 NS5, 2017 MQ8, 2017 MO7, 2017 MN7, 2017 ML8
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2017-O72 -- 90075
T08ATLAS Mauna Loa in Hawaii, 16 in MPECs 2017-O66, 2017-O67 & 2017-O72 -- 2017 OT18, 2017 OS18, 2017 OL1, 2017 OE7, 2015 FO124, 2014 YC15, 2004 BW1, 496018, 366733, 265962, 232368, 190166, 6053, 5143, 3752, 3288
160Castelmartini Obs. in Italy, 1 in MPEC 2017-O67 -- 2017 OT18
107Cavezzo Obs. in Italy, 1 in MPEC 2017-O72 -- 138925
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2017-O67 -- 2017 OT18
K88GINOP-KHK in Hungary, 2 in MPECs 2017-O66, 2017-O67 & 2017-O72 -- 2017 OT18, 2017 OS18
K73Gravina Obs. in Italy, 2 in MPEC 2017-O72 -- 190166, 138925
W19Kalamazoo Obs. in Michigan, 1 in MPEC 2017-O72 -- 1980
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2017-O66 -- 2017 OS18
568_Marco Micheli on Mauna Kea in Hawaii, 4 in MPECs 2017-O68, 2017-O69, 2017-O70 & 2017-O71 -- 2017 OX18, 2017 OW18, 2017 OV18, 2017 OU18
C47Nonndorf Obs. in Austria, 1 in MPEC 2017-O72 -- 2017 OG1
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2017-O72 -- 143409
F51Pan-STARRS 1 (PS1) in Hawaii, 17 in MPECs 2017-O66, 2017-O68, 2017-O69, 2017-O70, 2017-O71, 2017-O72 & 2017-O73 -- 2017 OX18, 2017 OW18, 2017 OV18, 2017 OU18, 2017 OS18, 2013 PE26, 2002 ET11, 410622, 349063, 20826, 163250, 162913, 162566, 154007, 152770, 100756, 5143
K63Pascoli Obs. in Italy, 1 in MPEC 2017-O67 -- 2017 OT18
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 22 in MPEC 2017-O72 -- 2017 OL1, 2017 OH7, 2017 NM6, 2017 MW4, 2017 MU8, 2017 GQ6, 2017 CS, 2017 BM31, 2015 FO124, 2014 YC15, 2014 SR339, 2009 BF, 90075, 68950, 496018, 495848, 422699, 294739, 190166, 142561, 138925, 106589
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 2 in MPECs 2017-O67 & 2017-O71 -- 2017 OX18, 2017 OT18
W25RMS Obs., 3 in MPECs 2017-O66, 2017-O67, 2017-O71 & 2017-O72 -- 2017 OX18, 2017 OT18, 2017 OS18
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2017-O68 & 2017-O69 -- 2017 OV18, 2017 OU18
H36Sandlot Obs. in Kansas, 3 in MPECs 2017-O66, 2017-O67 & 2017-O68 -- 2017 OU18, 2017 OT18, 2017 OS18
033Schwarzschild Obs. in Germany, 5 in MPECs 2017-O67, 2017-O72 & 2017-O73 -- 2017 OW18, 2017 OV18, 2017 OU18, 2017 OT18, 2002 ET11
K14Sencelles Obs. in Spain, 1 in MPEC 2017-O72 -- 496018
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-O72 -- 2017 NL6
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-O67 -- 2017 OT18
Y00SONEAR in Brazil, 2 in MPEC 2017-O72 -- 496018, 6053
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2017-O72 -- 138925
W34Squirrel Valley Obs. in North Carolina, 3 in MPEC 2017-O72 -- 68950, 6053, 2202
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2017-O67 & 2017-O69 -- 2017 OV18, 2017 OT18
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 July '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2358 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.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2017 OE7NEODyS2130211412.02e-05-5.75-5.750NEODyS: "Based on 41 optical observations (of which 2 are rejected as outliers) from 2017-07-24.486 to 2017-07-29.599."
JPL Sentry15302114-211414.766e-05-5.44-5.440JPL: Computed at 07:58 today Pacific time based on 40 observations spanning 5.1126 days (2017-Jul-24.48536 to 2017-Jul-29.59797). Diameter approximately 0.019 km. from weighted mean H=26.29.
2017 FB1NEODyS14412092-210658.24e-07-5.25-5.430NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2017-03-18.208 to 2017-04-24.165."

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 30 July '17

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

2130Noted that NEODyS has updated its 2017 OE7 risk assessment - see above
1810Generated Traffic Report
1530Noted that JPL Sentry has updated its 2017 OE7 risk assessment - see above
1441Noted that NEODyS has updated its 2017 FB1 risk assessment - see above
Grabbed MPEC 2017-O72 - Daily Orbit Update - see above
Grabbed MPEC 2017-O73 - 2002 ET11 - see above
0049Grabbed MPEC 2017-O66 - 2017 OS18 - see above
Grabbed MPEC 2017-O67 - 2017 OT18 - see above
Grabbed MPEC 2017-O68 - 2017 OU18 - see above
Grabbed MPEC 2017-O69 - 2017 OV18 - see above
Grabbed MPEC 2017-O70 - 2017 OW18 - see above
Grabbed MPEC 2017-O71 - 2017 OX18 - see above