Contents  on 14 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 14 August '18

Four objects reported inside ten LD

Today four transient natural objects are known to be less than ten lunar distances (LD) from our planet. Nearest are 2018 PM10, heading away from 6.80 to 8.38 LD, and risk-listed 2018 PR7, which moves out from 7.69 to 8.64 LD

Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41, 5.0 & 10.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
0.09 LD Aug. 10 2018 PD20 11 m  8.43 to 10.92 LD Aug. 6 - 14 intruder, exits ten LD
1.36 LD Aug. 6 2018 PR7 7 m  7.69 to 8.64 LD July 26 - Aug. 16 NHATS target, risk
3.21 LD Aug. 10 2018 PM10 13 m  6.80 to 8.38 LD Aug. 5 - 15 DOU
8.02 LD Aug. 16 2018 PM20 18 m  8.80 from 9.82 LD yesterday - Aug. 19 NEW - MPEC
Approaching Traffic - sorted by 10-LD bubble entry date
7.86 LD Aug. 18 2018 PK20 22 m  10.54 from 11.87 LD tomorrow - Aug. 22 NEW, NHATS target - MPEC
9.36 LD Aug. 27 2018 LQ2 37 m  10.25 from 10.37 LD Aug. 17 - Sept. 6 NHATS target
4.22 LD Aug. 29 1998 SD9 49 m  34.91 from 37.37 LD Aug. 25 - Sept. 2

This report was generated at 1652 UTC with the discoveries of approaching 2018 PK20 (MPEC), inbound 2018 PM20 (MPEC), and already departed objects 2018 PO20 (MPEC), which went past us at about 7.56 LD on August 7th, and risk-listed 2018 PJ20 (MPEC), which flew by at 6.09 LD on August 3rd, plus follow-up in today's DOU MPEC for outbound 2018 PM10.



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 14 August '18

The MPC's NEO Confirmation Page has 104 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 104 objects listed. Of these, 32 were "one nighters." So far The Tracking News has counted a total of 151 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 14 August '18

Minor Planet Electronic Circulars

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


MPEC 2018-P107 - "18:20 UT" - 2018 PN21


MPEC 2018-P106 - "18:16 UT" - 2018 PM21


MPEC 2018-P105 - "18:11 UT" - 2018 PL21


MPEC 2018-P104 - "18:07 UT" - 2018 PK21


MPEC 2018-P103 - "18:03 UT" - 2018 PJ21


MPEC 2018-P102 - "18:00 UT" - 2018 PH21


MPEC 2018-P101 - "17:56 UT" - 2018 PG21


MPEC 2018-P100 - "17:52 UT" - 2018 PF21


MPEC 2018-P99 - "17:48 UT" - 2018 PE21


MPEC 2018-P98 - "16:54 UT" - 2007 PR10


<< DOU on 14 Aug. '18 >>  MPEC 2018-P97 - "12:05 UT" - Daily Orbit Update


MPEC 2018-P96 - "02:44 UT" - 2015 BP4


MPEC 2018-P95 - "01:21 UT" - 2018 PO20


MPEC 2018-P94 - "01:18 UT" - 2018 PN20


MPEC 2018-P93 - "01:14 UT" - 2018 PM20


MPEC 2018-P92 - "01:10 UT" - 2018 PL20


MPEC 2018-P91 - "01:06 UT" - 2018 PK20


MPEC 2018-P90 - "01:01 UT" - 2018 PJ20

Observers  on 14 August '18

A total of 21 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 12 in MPECs 2018-P92, 2018-P93, 2018-P94, 2018-P95, 2018-P96, 2018-P99, 2018-P102, 2018-P103, 2018-P104, 2018-P105, 2018-P106 & 2018-P107 -- 2018 PO20, 2018 PN21, 2018 PN20, 2018 PM21, 2018 PM20, 2018 PL21, 2018 PL20, 2018 PK21, 2018 PJ21, 2018 PH21, 2018 PE21, 2015 BP4
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2018-P97 -- 2018 MM8
T08ATLAS Mauna Loa in Hawaii, 7 in MPEC 2018-P97 -- 2018 PL10, 2018 NU3, 2015 RB82, 1999 RV2, 99799, 89959, 6569
160Castelmartini Obs. in Italy, 5 in MPEC 2018-P97 -- 2018 PC, 2018 NN4, 2015 OH, 2011 GA62, 2002 OS4
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPECs 2018-P98, 2018-P99, 2018-P100, 2018-P101, 2018-P102, 2018-P104 & 2018-P106 -- 2018 PM21, 2018 PK21, 2018 PH21, 2018 PG21, 2018 PF21, 2018 PE21, 2007 PR10
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2018-P93 -- 2018 PM20
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2018-P90 -- 2018 PJ20
734Farpoint Obs. in Kansas, 4 in MPECs 2018-P91, 2018-P104, 2018-P105 & 2018-P107 -- 2018 PN21, 2018 PL21, 2018 PK21, 2018 PK20
J95Great Shefford Obs. in England, 4 in MPECs 2018-P93, 2018-P94, 2018-P97 & 2018-P107 -- 2018 PN21, 2018 PN20, 2018 PM20, 2018 PM10
W19Kalamazoo Obs. in Michigan, 1 in MPEC 2018-P97 -- 13553
568^R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2018-P93 -- 2018 PM20
568_Marco Micheli on Mauna Kea in Hawaii, 6 in MPECs 2018-P90, 2018-P102, 2018-P103, 2018-P105, 2018-P106 & 2018-P107 -- 2018 PN21, 2018 PM21, 2018 PL21, 2018 PJ21, 2018 PJ20, 2018 PH21
474Mt. John Obs. in New Zealand, 1 in MPEC 2018-P100 -- 2018 PF21
C47Nonndorf Obs. in Austria, 1 in MPEC 2018-P94 -- 2018 PN20
I41Palomar Transient Factory in southern California, 1 in MPEC 2018-P97 -- 162980
F51Pan-STARRS 1 (PS1) in Hawaii, 37 in MPECs 2018-P90, 2018-P91, 2018-P92, 2018-P94, 2018-P95, 2018-P96, 2018-P97, 2018-P98, 2018-P99, 2018-P100, 2018-P101, 2018-P102, 2018-P103, 2018-P104, 2018-P105, 2018-P106 & 2018-P107 -- 2018 PO20, 2018 PN21, 2018 PN20, 2018 PM21, 2018 PL21, 2018 PL20, 2018 PK21, 2018 PK20, 2018 PJ21, 2018 PJ20, 2018 PH9, 2018 PH21, 2018 PG9, 2018 PG21, 2018 PF21, 2018 PE9, 2018 PE21, 2018 PC20, 2018 LD16, 2018 FS3, 2015 BP4, 2011 GQ61, 2007 PR10, 2001 QA143, 508871, 506859, 454078, 418896, 326386, 267729, 243566, 162168, 141851, 7350, 6063, 5786, 719
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2018-P91 & 2018-P104 -- 2018 PK21, 2018 PK20
C95SATINO-1 in France, 1 in MPEC 2018-P97 -- 7889
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2018-P97 -- 2018 PX7
291Spacewatch 1.8m telescope in Arizona, 5 in MPECs 2018-P97, 2018-P99, 2018-P102, 2018-P103 & 2018-P105 -- 2018 PL21, 2018 PJ21, 2018 PH21, 2018 PF8, 2018 PE21
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPEC 2018-P97 -- 2018 PF8, 2018 NY14, 2018 NE, 2018 LZ13
L01Visnjan Obs., 7 in MPECs 2018-P91, 2018-P92, 2018-P93, 2018-P94, 2018-P95, 2018-P104 & 2018-P107 -- 2018 PO20, 2018 PN21, 2018 PN20, 2018 PM20, 2018 PL20, 2018 PK21, 2018 PK20
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 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 PK21NEODyS23072109-211231.94e-07-7.74-7.840NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2018-08-11.496 to 2018-08-14.324."
JPL Sentry20202100-2118186.4056147e-06-6.22-6.920JPL: Computed at 12:36 today Pacific time based on 22 observations spanning 2.8273 days (2018-Aug-11.4954 to 2018-Aug-14.32275). Diameter approximately 0.021 km. from weighted mean H=26.05.
2018 PG21NEODyS23072060-2116115.02e-08-4.71-5.230NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2018-08-08.552 to 2018-08-14.405."
JPL Sentry19102086-2118197.15765e-08-4.63-5.210JPL: Computed at 11:57 today Pacific time based on 13 observations spanning 5.8528 days (2018-Aug-08.55164 to 2018-Aug-14.40449). Diameter approximately 0.478 km. from weighted mean H=19.26.
2018 PJ20NEODyS15002058-209326.83e-08-8.33-8.440NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2018-08-08.403 to 2018-08-10.491."
JPL Sentry04002093-211721.5591e-07-8.05-8.180JPL: Computed at 19:28 Aug. 13th Pacific time based on 9 observations spanning 2.0883 days (2018-Aug-08.40194 to 2018-Aug-10.490243). Diameter approximately 0.013 km. from weighted mean H=27.13.
2018 PF8JPL Sentry2104R E M O V E DJPL: Risk listing removed at 2055 UTC today
NEODyS1600R 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 14 August '18

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

2307Noted that NEODyS has posted 2018 PG21 as an impact risk - see above
Noted that NEODyS has posted 2018 PK21 as an impact risk - see above
2104Noted that JPL Sentry has removed 2018 PF8 as an impact risk - see above
2020Noted that JPL Sentry has posted 2018 PK21 as an impact risk - see above
1910Noted that JPL Sentry has posted 2018 PG21 as an impact risk - see above
1830Grabbed MPEC 2018-P102 - 2018 PH21 - see above
Grabbed MPEC 2018-P103 - 2018 PJ21 - see above
Grabbed MPEC 2018-P104 - 2018 PK21 - see above
Grabbed MPEC 2018-P105 - 2018 PL21 - see above
Grabbed MPEC 2018-P106 - 2018 PM21 - see above
Grabbed MPEC 2018-P107 - 2018 PN21 - see above
1800Grabbed MPEC 2018-P99 - 2018 PE21 - see above
Grabbed MPEC 2018-P100 - 2018 PF21 - see above
Grabbed MPEC 2018-P101 - 2018 PG21 - see above
1700Grabbed MPEC 2018-P98 - 2007 PR10 - see above
1652Generated Traffic Report
1600Noted that NEODyS has removed 2018 PF8 as an impact risk - see above
1500Noted that NEODyS has posted 2018 PJ20 as an impact risk - see above
Grabbed MPEC 2018-P97 - Daily Orbit Update - see above
0400Noted that JPL Sentry has posted 2018 PJ20 as an impact risk - see above
Grabbed MPEC 2018-P90 - 2018 PJ20 - see above
Grabbed MPEC 2018-P91 - 2018 PK20 - see above
Grabbed MPEC 2018-P92 - 2018 PL20 - see above
Grabbed MPEC 2018-P93 - 2018 PM20 - see above
Grabbed MPEC 2018-P94 - 2018 PN20 - see above
Grabbed MPEC 2018-P95 - 2018 PO20 - see above
Grabbed MPEC 2018-P96 - 2015 BP4 - see above