Contents  on 12 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 12 August '18

Three objects reported inside ten LD

There are three small celestial objects reported within ten lunar distances (LD) of our planet today. Closest is newly announced intruder 2018 PD20, which is outbound from 3.48 to 5.96 LD, while 2018 PM10 moves away from 4.06 to 5.31 LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41 & 10.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
0.09 LD Aug. 10 2018 PD20 11 m  3.48 to 5.96 LD Aug. 6 - 14 NEW, intruder - MPEC
1.36 LD Aug. 6 2018 PR7 7 m  5.81 to 6.75 LD July 26 - Aug. 16 NHATS target, risk - DOU
3.21 LD Aug. 10 2018 PM10 13 m  4.06 to 5.31 LD Aug. 5 - 15 DOU
Approaching Traffic - sorted by 10-LD bubble entry date
9.36 LD Aug. 27 2018 LQ2 37 m  10.50 from 10.64 LD Aug. 17 - Sept. 6 NHATS target - DOU
4.22 LD Aug. 29 1998 SD9 49 m  39.84 from 42.32 LD Aug. 25 - Sept. 2

This report was updated at 2332 UTC with the discovery of 2018 PD20 (MPEC), which on August 10th flew by the Earth at about 0.087 LD and the Moon at 0.46 LD. Your first local asteroid traffic report was generated at 1840 UTC with follow-up in today's DOU MPEC for approaching 2018 LQ2, outbound objects 2018 PM10 and risk-listed 2018 PR7, and for six departed objects: 2018 PD9, 1999 FN19, and risk listed objects 2018 PY7, 2018 NL, 2018 MC7, and 2018 JG1.



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.

NEOCP Activity  on 12 August '18

The MPC's NEO Confirmation Page has 108 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 108 objects listed. Of these, 60 were "one nighters." So far The Tracking News has counted a total of 123 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 12 August '18

Minor Planet Electronic Circulars

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


MPEC 2018-P79 - "21:17 UT" - 2018 PD20


MPEC 2018-P78 - "21:13 UT" - 2018 PC20


MPEC 2018-P77 - "21:09 UT" - 2018 PB20


MPEC 2018-P76 - "21:05 UT" - 2018 PA20


MPEC 2018-P75 - "21:01 UT" - 2018 PZ19


MPEC 2018-P74 - "20:58 UT" - 2018 PY19


MPEC 2018-P73 - "20:54 UT" - 2018 PX19


MPEC 2018-P72 - "19:37 UT" - 2000 GB2


MPEC 2018-P71 - "18:58 UT" - 2017 DQ35


MPEC 2018-P70 - "18:56 UT" - 2005 WF57


MPEC 2018-P69 - "18:14 UT" - 2017 MZ4


<< DOU on 12 Aug. '18 >>  MPEC 2018-P68 - "12:04 UT" - Daily Orbit Update

Observers  on 12 August '18

A total of 30 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 17 in MPECs 2018-P68, 2018-P72, 2018-P76, 2018-P78 & 2018-P79 -- 2018 PD20, 2018 PC20, 2018 PA20, 2018 NR, 2018 NN3, 2018 NG4, 2018 NE, 2018 LC16, 2018 KD1, 2017 QX34, 2016 LE51, 2015 HF11, 2014 FD7, 2011 SR5, 2000 GB2, 518507, 516641
T05ATLAS Haleakala in Hawaii, 4 in MPECs 2018-P68, 2018-P70 & 2018-P78 -- 2018 PM9, 2018 PL9, 2018 PC20, 2005 WF57
T08ATLAS Mauna Loa in Hawaii, 20 in MPECs 2018-P68, 2018-P78 & 2018-P79 -- 2018 PD20, 2018 PC20, 2018 MM8, 2013 EP41, 2011 GA62, 2009 QJ9, 2005 RB, 68950, 481394, 437841, 418929, 415029, 413563, 283729, 162168, 140039, 138847, 13553, 11500, 2061
160Castelmartini Obs. in Italy, 7 in MPEC 2018-P68 -- 86878, 65996, 65706, 141527, 140039, 2061, 1981
K51Celado Obs. in Italy, 2 in MPECs 2018-P73 & 2018-P78 -- 2018 PX19, 2018 PC20
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPECs 2018-P68, 2018-P70, 2018-P74, 2018-P75 & 2018-P77 -- 2018 PZ19, 2018 PY19, 2018 PL8, 2018 PG8, 2018 PB20, 2018 MQ6, 2018 LJ5, 2018 GQ2, 2018 FH, 2005 WF57
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2018-P78 -- 2018 PC20
I19El Gato Gris Obs. in Argentina, 2 in MPECs 2018-P78 & 2018-P79 -- 2018 PD20, 2018 PC20
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2018-P75 -- 2018 PZ19
006Fabra Obs. in Spain, 1 in MPEC 2018-P68 -- 13553
157Frasso Sabino Obs. in Italy, 5 in MPEC 2018-P68 -- 2018 PU7, 2018 PC, 2018 NU3, 2018 LQ2, 2005 RB
J77Golden Hill Obs. in England, 1 in MPEC 2018-P68 -- 2018 PM10
J95Great Shefford Obs. in England, 1 in MPEC 2018-P78 -- 2018 PC20
Q63LCO Siding Spring A in New South Wales, 1 in MPEC 2018-P73 -- 2018 PX19
568_Marco Micheli on Mauna Kea in Hawaii, 2 in MPECs 2018-P71 & 2018-P77 -- 2018 PB20, 2017 DQ35
711McDonald Obs. in Texas, 1 in MPEC 2018-P74 -- 2018 PY19
474Mt. John Obs. in New Zealand, 10 in MPECs 2018-P68, 2018-P74 & 2018-P77 -- 2018 PY19, 2018 PQ9, 2018 PL8, 2018 PH9, 2018 PG8, 2018 PF9, 2018 PD9, 2018 PB9, 2018 PB20, 2018 NR1
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2018-P79 -- 2018 PD20
F51Pan-STARRS 1 (PS1) in Hawaii, 34 in MPECs 2018-P68, 2018-P71, 2018-P72, 2018-P73, 2018-P74, 2018-P75, 2018-P76 & 2018-P77 -- 2018 PZ19, 2018 PY19, 2018 PX7, 2018 PX19, 2018 PW7, 2018 PV7, 2018 PL8, 2018 PB20, 2018 PA20, 2018 OB, 2017 YC8, 2017 DQ35, 2014 QP266, 2013 PU31, 2012 DJ4, 2008 PH9, 2006 SJ198, 2004 BE86, 2001 QC96, 2000 GB2, 1999 FN19, 87311, 54660, 450270, 399457, 382459, 376788, 374267, 331471, 301011, 251346, 163364, 5653, 4183
K63Pascoli Obs. in Italy, 1 in MPEC 2018-P78 -- 2018 PC20
K61Rokycany Obs. in the Czech Republic, 2 in MPECs 2018-P78 & 2018-P79 -- 2018 PD20, 2018 PC20
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2018-P78 & 2018-P79 -- 2018 PD20, 2018 PC20
C95SATINO-1 in France, 1 in MPEC 2018-P68 -- 1627
204Schiaparelli Obs. in Italy, 3 in MPECs 2018-P68 & 2018-P79 -- 2018 PM10, 2018 PL9, 2018 PD20
Y00SONEAR in Brazil, 1 in MPEC 2018-P68 -- 99799
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2018-P76 -- 2018 PA20
W34Squirrel Valley Obs. in North Carolina, 3 in MPECs 2018-P68, 2018-P78 & 2018-P79 -- 2018 PD20, 2018 PC20, 2015 QM3
461SZTE Asteroid Program in Hungary, 1 in MPEC 2018-P69 -- 2017 MZ4
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 10 in MPEC 2018-P68 -- 2018 PY7, 2018 PR7, 2018 PG9, 2018 PF8, 2018 NL, 2018 MC7, 2018 MC5, 2018 KB1, 2018 JG1, 337252
L01Visnjan Obs., 4 in MPECs 2018-P73, 2018-P76, 2018-P78 & 2018-P79 -- 2018 PX19, 2018 PD20, 2018 PC20, 2018 PA20
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 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 PP10NEODyS21342024-2118695.38e-09-5.37-5.57n/aNEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2018-08-08.416 to 2018-08-11.474."
2018 PG9NEODyS2134R E M O V E D-
JPL Sentry1600R E M O V E DJPL: Risk listing removed at 1516 UTC today
2018 PD9NEODyS2134209511.93e-09-10.25-10.250NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2018-08-07.374 to 2018-08-11.534."
2018 PF8NEODyS21342028-2117331.32e-07-3.95-4.350NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2018-08-05.276 to 2018-08-11.253."
JPL Sentry16002028-2105195.80821e-08-4.22-4.510JPL: Computed at 08:11 today Pacific time based on 23 observations spanning 5.9764 days (2018-Aug-05.27535 to 2018-Aug-11.251738). Diameter approximately 0.354 km. from weighted mean H=19.90.
2018 PY7NEODyS21342096-2118334.66e-05-5.52-6.01n/aNEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2018-08-05.562 to 2018-08-11.466."
JPL Sentry16002097-2115162.971994e-05-5.68-6.100JPL: Computed at 08:09 today Pacific time based on 28 observations spanning 5.9037 days (2018-Aug-05.56103 to 2018-Aug-11.464702). Diameter approximately 0.015 km. from weighted mean H=26.77.
2018 PR7NEODyS2134209719.16e-10-11.17-11.170NEODyS: "Based on 52 optical observations (of which 0 are rejected as outliers) from 2018-08-06.267 to 2018-08-11.387."
JPL Sentry1600R E M O V E DJPL: Risk listing removed at 1506 UTC today
2018 NLJPL Sentry16002060-210895.91483e-05-4.49-4.720JPL: Computed at 07:56 today Pacific time based on 33 observations spanning 39.157 days (2018-Jul-03.40294 to 2018-Aug-11.560068). Diameter approximately 0.029 km. from weighted mean H=25.37.
2018 MC7NEODyS21342060-2117884.31e-03-3.08-3.540NEODyS: "Based on 47 optical observations (of which 1 are rejected as outliers) from 2018-06-21.395 to 2018-08-11.498."
JPL Sentry16002060-2114270.00259527204-3.26-3.270JPL: Computed at 07:56 today Pacific time based on 45 observations spanning 51.103 days (2018-Jun-21.39443 to 2018-Aug-11.497641). Diameter approximately 0.020 km. from weighted mean H=26.16.
2018 MC5NEODyS21342112-211721.23e-07-7.57-7.640NEODyS: "Based on 52 optical observations (of which 0 are rejected as outliers) from 2018-06-12.476 to 2018-08-11.615."
2018 JG1NEODyS2134R E M O V E D-

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 12 August '18

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

2332Updated Traffic Report
2134Noted that NEODyS has removed 2018 JG1 as an impact risk - see above
Noted that NEODyS has updated its 2018 MC5 risk assessment - see above
Noted that NEODyS has updated its 2018 MC7 risk assessment - see above
Noted that NEODyS has posted 2018 PD9 as an impact risk - see above
Noted that NEODyS has updated its 2018 PF8 risk assessment - see above
Noted that NEODyS has removed 2018 PG9 as an impact risk - see above
Noted that NEODyS has posted 2018 PP10 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
Grabbed MPEC 2018-P76 - 2018 PA20 - see above
Grabbed MPEC 2018-P77 - 2018 PB20 - see above
Grabbed MPEC 2018-P78 - 2018 PC20 - see above
Grabbed MPEC 2018-P79 - 2018 PD20 - see above
2104Grabbed MPEC 2018-P72 - 2000 GB2 - see above
Grabbed MPEC 2018-P73 - 2018 PX19 - see above
Grabbed MPEC 2018-P74 - 2018 PY19 - see above
Grabbed MPEC 2018-P75 - 2018 PZ19 - see above
1900Grabbed MPEC 2018-P70 - 2005 WF57 - see above
Grabbed MPEC 2018-P71 - 2017 DQ35 - see above
1829Grabbed MPEC 2018-P69 - 2017 MZ4 - see above
1600Noted that JPL Sentry has updated its 2018 MC7 risk assessment - see above
Noted that JPL Sentry has updated its 2018 NL risk assessment - see above
Noted that JPL Sentry has updated its 2018 PF8 risk assessment - see above
Noted that JPL Sentry has removed 2018 PG9 as an impact risk - see above
Noted that JPL Sentry has removed 2018 PR7 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 PY7 risk assessment - see above
Grabbed MPEC 2018-P68 - Daily Orbit Update - see above