Contents  on 10 August '18

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 10 August '18

Two objects reported inside ten LD

Two asteroidal objects are reported within ten lunar distances (LD) of Earth today. Nearest is risk-listed 2018 PR7, which heads out from 3.98 to 4.89 LD.

Neighborhood Traffic - sorted by Earth passage distance
Earth passage I D ~Size Distance today  Inside ten LD Notes
1.36 LD Aug. 6 2018 PR7 6 m  3.98 to 4.89 LD July 26 - Aug. 16 NHATS target, risk - DOU
1.63 LD Aug. 3 2018 PP9 22 m  8.76 to 10.08 LD July 27 - today NEW, exits ten LD - MPEC
Approaching Traffic - sorted by 10-LD bubble entry date
9.36 LD Aug. 27 2018 LQ2 37 m  10.78 from 10.92 LD Aug. 17 - Sept. 6 NHATS target
4.22 LD Aug. 29 1998 SD9 49 m  44.82 from 47.34 LD Aug. 25 - Sept. 2

This report was generated at 1810 UTC with the discoveries of outbound 2018 PP9 (MPEC) and already departed 2018 PD9 (MPEC), which flew past us at 5.32 LD on August 1st. Today's DOU MPEC has follow-up for outbound 2018 PR7 and departed risk-listed 2018 PY7, plus astrometry for 441987 2010 NY65. This last also had radar astrometry posted yesterday along with 68347 2001 KB67.



Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting about transient natural objects that approach our planet's 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 temporal 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 10 August '18

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 2358 UTC when the database was dated 10 Aug.

NEOCP Activity  on 10 August '18

The MPC's NEO Confirmation Page has 76 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 76 objects listed. Of these, 20 were "one nighters." So far The Tracking News has counted a total of 101 listings on the NEOCP today.

New MPECs  on 10 August '18

Minor Planet Electronic Circulars

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


MPEC 2018-P52 - "15:46 UT" - 2018 PR9


MPEC 2018-P51 - "15:43 UT" - 2018 PQ9


MPEC 2018-P50 - "15:39 UT" - 2018 PP9


MPEC 2018-P49 - "15:36 UT" - 2018 PO9


MPEC 2018-P48 - "15:32 UT" - 2018 PN9


MPEC 2018-P47 - "15:28 UT" - 2018 PM9


MPEC 2018-P46 - "15:24 UT" - 2018 PL9


MPEC 2018-P45 - "15:20 UT" - 2018 PK9


MPEC 2018-P44 - "15:16 UT" - 2018 PJ9


MPEC 2018-P43 - "15:11 UT" - 2018 PH9


MPEC 2018-P42 - "15:07 UT" - 2018 PG9


MPEC 2018-P41 - "15:03 UT" - 2018 PF9


<< DOU on 10 Aug. '18 >>  MPEC 2018-P40 - "12:10 UT" - Daily Orbit Update


MPEC 2018-P39 - "12:01 UT" - 2018 PD9


MPEC 2018-P38 - "11:58 UT" - 2018 PC9


MPEC 2018-P37 - "11:55 UT" - 2018 PE9


MPEC 2018-P36 - "11:51 UT" - 2018 PB9


MPEC 2018-P35 - "03:49 UT" - 2016 UJ31


MPEC 2018-P34 - "03:47 UT" - 2011 EJ47

Observers  on 10 August '18

A total of 38 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2018-P46 -- 2018 PL9
251Arecibo in Puerto Rico, 1 in radar -- 2018 EJ4
H21Astronomical Research Obs. Westfield in Illinois, 6 in MPECs 2018-P40, 2018-P41, 2018-P42, 2018-P44, 2018-P48 & 2018-P52 -- 2018 PR9, 2018 PN9, 2018 PJ9, 2018 PG9, 2018 PF9, 2018 NN4
T05ATLAS Haleakala in Hawaii, 6 in MPECs 2018-P40, 2018-P46, 2018-P47 & 2018-P50 -- 2018 PP9, 2018 PM9, 2018 PL9, 2018 NN4, 162168, 13553
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2018-P44 -- 2018 PJ9
X74Campo dos Amarais Obs., 1 in MPEC 2018-P46 -- 2018 PL9
160Castelmartini Obs. in Italy, 4 in MPECs 2018-P40 & 2018-P44 -- 2018 PJ9, 2018 NN4, 2015 OH, 518640
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 8 in MPECs 2018-P36, 2018-P37, 2018-P40, 2018-P41, 2018-P49 & 2018-P51 -- 2018 PQ9, 2018 PO9, 2018 PF9, 2018 PF8, 2018 PE9, 2018 PB9, 2018 NT3, 2018 KK2
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2018-P46 -- 2018 PL9
Z45Cosmos Obs., 3 in MPEC 2018-P40 -- 86324, 438429, 15745
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 11 in MPECs 2018-P35, 2018-P39, 2018-P40, 2018-P43, 2018-P44, 2018-P45, 2018-P46, 2018-P47, 2018-P48, 2018-P50 & 2018-P52 -- 2018 PR9, 2018 PP9, 2018 PN9, 2018 PM9, 2018 PL9, 2018 PK9, 2018 PJ9, 2018 PH9, 2018 PF8, 2018 PD9, 2016 UJ31
734Farpoint Obs. in Kansas, 3 in MPECs 2018-P42, 2018-P44 & 2018-P51 -- 2018 PQ9, 2018 PJ9, 2018 PG9
V04Flagstaff Robotic Survey Telescope (FRoST) in Arizona, 3 in MPEC 2018-P40 -- 441987, 15745, 1627
X31Galilei Obs., 1 in MPEC 2018-P46 -- 2018 PL9
K88GINOP-KHK in Hungary, 1 in MPEC 2018-P44 -- 2018 PJ9
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2018 EJ4
K73Gravina Obs. in Italy, 2 in MPEC 2018-P40 -- 17274, 1627
J95Great Shefford Obs. in England, 3 in MPECs 2018-P40, 2018-P44 & 2018-P48 -- 2018 PY7, 2018 PN9, 2018 PJ9
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2018-P40 & 2018-P46 -- 2018 PL9, 2018 KE3
P93JAXA Space Tracking & Communications Center (JAXA STCC) in Japan, 2 in MPECs 2018-P44 & 2018-P46 -- 2018 PL9, 2018 PJ9
W87LCO Cerro Tololo C in Chile, 1 in MPEC 2018-P41 -- 2018 PF9
Q64LCO Siding Spring B in New South Wales, 2 in MPECs 2018-P37 & 2018-P49 -- 2018 PO9, 2018 PE9
568_Marco Micheli on Mauna Kea in Hawaii, 4 in MPECs 2018-P38, 2018-P39, 2018-P43 & 2018-P45 -- 2018 PK9, 2018 PH9, 2018 PD9, 2018 PC9
711McDonald Obs. in Texas, 11 in MPECs 2018-P34, 2018-P36, 2018-P42, 2018-P43, 2018-P44, 2018-P46, 2018-P47, 2018-P48, 2018-P49, 2018-P50 & 2018-P51 -- 2018 PQ9, 2018 PP9, 2018 PO9, 2018 PN9, 2018 PM9, 2018 PL9, 2018 PJ9, 2018 PH9, 2018 PG9, 2018 PB9, 2011 EJ47
474Mt. John Obs. in New Zealand, 15 in MPECs 2018-P38, 2018-P39, 2018-P40, 2018-P41 & 2018-P43 -- 2018 PT7, 2018 PR7, 2018 PL8, 2018 PH9, 2018 PG8, 2018 PF9, 2018 PD9, 2018 PC9, 2018 NS3, 2018 NR4, 2018 NP1, 2018 MV4, 2016 OP5, 2016 CX264, 2011 UG21
566NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2018-P40 -- 2017 YC8
J69North Obs. in England, 1 in MPEC 2018-P40 -- 2018 PU7
F51Pan-STARRS 1 (PS1) in Hawaii, 25 in MPECs 2018-P34, 2018-P36, 2018-P37, 2018-P38, 2018-P39, 2018-P40, 2018-P41, 2018-P42, 2018-P43, 2018-P45, 2018-P46, 2018-P48, 2018-P49, 2018-P50, 2018-P51 & 2018-P52 -- 2018 PR9, 2018 PQ9, 2018 PP9, 2018 PO9, 2018 PN9, 2018 PL9, 2018 PK9, 2018 PH9, 2018 PG9, 2018 PF9, 2018 PE9, 2018 PD9, 2018 PC9, 2018 PB9, 2018 KR2, 2015 TN237, 2015 OR78, 2013 EP41, 2011 EJ47, 2005 CS6, 508871, 264308, 243566, 163364, 5731
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2018-P44 -- 2018 PJ9
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2018-P44, 2018-P45, 2018-P47 & 2018-P48 -- 2018 PN9, 2018 PM9, 2018 PK9, 2018 PJ9
C95SATINO-1 in France, 1 in MPEC 2018-P40 -- 719
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-P40 -- 2018 KV
G40*program code "*" (19) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-P40 -- 2018 PL8
Y00SONEAR in Brazil, 1 in MPEC 2018-P44 -- 2018 PJ9
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2018-P36 & 2018-P41 -- 2018 PF9, 2018 PB9
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2018-P42 -- 2018 PG9
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 5 in MPECs 2018-P35 & 2018-P40 -- 2018 NS, 2018 MW6, 2018 ME5, 2018 KV, 2016 UJ31
L01Visnjan Obs., 5 in MPECs 2018-P44, 2018-P46, 2018-P47, 2018-P48 & 2018-P50 -- 2018 PP9, 2018 PN9, 2018 PM9, 2018 PL9, 2018 PJ9
I15Wishing Star Obs. in Rhode Island, 4 in MPEC 2018-P40 -- 86324, 68950, 413563, 719
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 August '18

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
2018 PG9NEODyS18312074-209564.98e-09-6.90-7.380NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2018-08-05.397 to 2018-08-09.291."
JPL Sentry17012074-209024.093e-09-6.91-7.030JPL: Computed at 09:26 today Pacific time based on 14 observations spanning 3.8936 days (2018-Aug-05.39655 to 2018-Aug-09.29015). Diameter approximately 0.126 km. from weighted mean H=22.17.
2018 PF8NEODyS17012028-2116368.83e-08-3.97-4.140NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2018-08-05.276 to 2018-08-10.029."
JPL Sentry15002028-2105323.01229e-08-4.55-4.960JPL: Computed at 07:40 today Pacific time based on 21 observations spanning 4.7526 days (2018-Aug-05.27535 to 2018-Aug-10.02797). Diameter approximately 0.360 km. from weighted mean H=19.86.
2018 PY7NEODyS17012096-2118333.11e-05-5.60-6.06n/aNEODyS #2 for the day: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2018-08-05.562 to 2018-08-10.024."
JPL Sentry15002097-2115172.203646e-05-5.74-6.340JPL: Computed at 07:42 today Pacific time based on 23 observations spanning 4.4623 days (2018-Aug-05.56103 to 2018-Aug-10.02335). Diameter approximately 0.016 km. from weighted mean H=26.62.
2018 PR7NEODyS17012097-211661.18e-05-7.07-7.080NEODyS #2 for the day: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2018-08-06.267 to 2018-08-09.547."
JPL Sentry15002097-210531.717625e-05-6.90-6.920JPL: Computed at 07:43 today Pacific time based on 39 observations spanning 3.2797 days (2018-Aug-06.26605 to 2018-Aug-09.545724). Diameter approximately 0.006 km. from weighted mean H=28.59.

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 10 August '18

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

2358Noted Radar Astrometry database update - see above
1831Noted that NEODyS has posted 2018 PG9 as an impact risk - see above
1810Generated Traffic Report
1701Noted that NEODyS has updated its 2018 PF8 risk assessment - see above
Noted that JPL Sentry has posted 2018 PG9 as an impact risk - see above
Noted that NEODyS has updated its 2018 PR7 risk assessment - see above
Noted that NEODyS has updated its 2018 PY7 risk assessment - see above
1601Grabbed MPEC 2018-P48 - 2018 PN9 - see above
Grabbed MPEC 2018-P49 - 2018 PO9 - see above
Grabbed MPEC 2018-P50 - 2018 PP9 - see above
Grabbed MPEC 2018-P51 - 2018 PQ9 - see above
Grabbed MPEC 2018-P52 - 2018 PR9 - see above
1530Grabbed MPEC 2018-P41 - 2018 PF9 - see above
Grabbed MPEC 2018-P42 - 2018 PG9 - see above
Grabbed MPEC 2018-P43 - 2018 PH9 - see above
Grabbed MPEC 2018-P44 - 2018 PJ9 - see above
Grabbed MPEC 2018-P45 - 2018 PK9 - see above
Grabbed MPEC 2018-P46 - 2018 PL9 - see above
Grabbed MPEC 2018-P47 - 2018 PM9 - see above
1500Noted that JPL Sentry has updated its 2018 PF8 risk assessment - see above
Noted that JPL Sentry has updated its 2018 PR7 risk assessment - see above
Noted that NEODyS has updated its 2018 PR7 risk assessment - see above
Noted that JPL Sentry has updated its 2018 PY7 risk assessment - see above
Noted that NEODyS has updated its 2018 PY7 risk assessment - see above
Grabbed MPEC 2018-P35 - 2016 UJ31 - see above
Grabbed MPEC 2018-P36 - 2018 PB9 - see above
Grabbed MPEC 2018-P37 - 2018 PE9 - see above
Grabbed MPEC 2018-P38 - 2018 PC9 - see above
Grabbed MPEC 2018-P39 - 2018 PD9 - see above
Grabbed MPEC 2018-P40 - Daily Orbit Update - see above
0349Grabbed MPEC 2018-P34 - 2011 EJ47 - see above