Contents  on 19 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 19 August '18

Eight objects reported inside ten LD

There are eight small Solar-System bodies reported inside ten lunar distances (LD) of our home world today. Nearest is risk-listed 2018 QE, which moves in from 3.02 to 2.80 LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 5.0 & 10.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
2.80 LD tomorrow 2018 QE 9 m  2.80 from 3.02 LD Aug. 10 - 29 NHATS target, risk - DOU
5.57 LD Aug. 16 2018 PT23 42 m  9.38 to 12.43 LD Aug. 14 - 19 exits ten LD
6.21 LD Aug. 9 2018 PN22 11 m  8.16 to 8.52 LD July 25 - Aug. 23 NHATS target
7.80 LD Aug. 23 2018 PU23 8 m  7.91 from 7.98 LD Aug. 7 - Sept. 13 NHATS target, risk - DOU
7.88 LD yesterday 2018 PK20 23 m  7.90 to 8.22 LD Aug. 15 - 22 NHATS target - DOU
8.02 LD Aug. 16 2018 PM20 18 m  9.16 to 10.29 LD Aug. 13 - 19 exits ten LD
8.84 LD yesterday 2018 PO22 82 m  8.98 to 9.73 LD Aug. 16 - 20
9.36 LD Aug. 27 2018 LQ2 37 m  9.72 from 9.81 LD Aug. 17 - Sept. 6 NHATS target - DOU
Approaching Traffic
4.22 LD Aug. 29 1998 SD9 49 m  22.83 from 25.22 LD Aug. 25 - Sept. 2 radar target

This report was generated at 1744 UTC with follow-up in today's DOU MPEC for inbound objects 2018 LQ2 and risk-listed 2018 QE and 2018 PU23, and for outbound 2018 PK20 and departed risk-listed 2018 PJ20.



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 19 August '18

The MPC's NEO Confirmation Page has 51 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 51 objects listed. Of these, nineteen were "one nighters." So far The Tracking News has counted a total of 53 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 19 August '18

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 19 Aug. '18 >>  MPEC 2018-Q38 - "12:04 UT" - Daily Orbit Update

Observers  on 19 August '18

Seventeen observers appear in today's MPEC.

CodeObserver / observatory
T05ATLAS Haleakala in Hawaii, 9 in MPEC 2018-Q38 -- 2015 QM3, 2012 OD1, 53789, 455550, 436771, 413563, 16834, 136818, 115052
T08ATLAS Mauna Loa in Hawaii, 23 in MPEC 2018-Q38 -- 2018 NN4, 2018 KE3, 2017 YC8, 2016 NF23, 2015 RJ83, 2012 UV27, 87311, 445267, 376788, 21277, 18109, 180186, 17511, 17274, 17182, 162168, 140039, 137125, 136849, 6456, 5653, 4183, 719
U63Burnt Tree Hill Obs., 1 in MPEC 2018-Q38 -- 2005 RB
X74Campo dos Amarais Obs., 1 in MPEC 2018-Q38 -- 2005 UY5
160Castelmartini Obs. in Italy, 15 in MPEC 2018-Q38 -- 2018 PL10, 2018 PK20, 2018 PJ10, 2018 NB, 2018 MM8, 2015 AX16, 2013 EP41, 2011 GA62, 2001 SC170, 1999 RB32, 87311, 418929, 31345, 162168, 140039
K87Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2018-Q38 -- 2018 NN4
A17Guidestar Obs. in Germany, 2 in MPEC 2018-Q38 -- 2018 PJ22, 2006 OT9
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2018-Q38 -- 350988
C41MASTER-II Kislovodsk in Russia, 1 in MPEC 2018-Q38 -- 16960
K74Muensterschwarzach Obs. in Germany, 2 in MPEC 2018-Q38 -- 86324, 719
C23Olmen Obs. in Belgium, 2 in MPEC 2018-Q38 -- 2018 NB, 2061
F51Pan-STARRS 1 (PS1) in Hawaii, 22 in MPEC 2018-Q38 -- 2018 PT10, 2018 PN10, 2018 PJ8, 2017 ED4, 2015 VW1, 2014 MD55, 2013 AU76, 2005 CS6, 53789, 495102, 410650, 399457, 288914, 283729, 264308, 253841, 253062, 189973, 163364, 163081, 138847, 5731
679San Pedro Martir Obs. in Mexico, 1 in MPEC 2018-Q38 -- 2018 PJ20
C95SATINO-1 in France, 1 in MPEC 2018-Q38 -- 15745
204Schiaparelli Obs. in Italy, 19 in MPEC 2018-Q38 -- 2018 QE, 2018 PW7, 2018 PL8, 2018 PL10, 2018 PJ9, 2018 PJ10, 2018 PC, 2018 OB, 2018 NV2, 2018 NN4, 2018 NN, 2018 NE1, 2018 MR8, 2018 ME5, 2018 KE3, 2018 FO5, 2012 OD1, 2009 OG, 2001 SC170
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2018-Q38 -- 2018 PU23, 2018 LQ2
G33Wickede Obs. in Germany, 1 in MPEC 2018-Q38 -- 13553
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 August '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2359 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 QENEODyS23592036-2118441.96e-05-6.28-6.67-NEODyS: "Based on 24 optical observations (of which 1 are rejected as outliers) from 2018-08-17.430 to 2018-08-19.061."
JPL Sentry16002036-2107161.827907e-05-6.12-6.330JPL: Computed at 08:22 today Pacific time based on 24 observations spanning 1.6307 days (2018-Aug-17.42914 to 2018-Aug-19.05987). Diameter approximately 0.009 km. from weighted mean H=27.90.
2018 PU23NEODyS23592072-2118264.62e-05-6.27-6.55-NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2018-08-11.454 to 2018-08-19.314."
JPL Sentry16002072-209748.0473e-06-6.97-7.370JPL: Computed at 08:12 today Pacific time based on 16 observations spanning 7.8594 days (2018-Aug-11.45358 to 2018-Aug-19.31295). Diameter approximately 0.008 km. from weighted mean H=28.12.
2018 PJ20NEODyS2359205812.03e-09-9.64-9.640NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2018-08-08.403 to 2018-08-18.373."
JPL Sentry1600R E M O V E DJPL: Risk listing removed at 1455 UTC today

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 19 August '18

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

2359Noted that NEODyS has updated its 2018 PJ20 risk assessment - see above
Noted that NEODyS has updated its 2018 PU23 risk assessment - see above
Noted that NEODyS has posted 2018 QE as an impact risk - see above
1744Generated Traffic Report
1600Noted that JPL Sentry has removed 2018 PJ20 as an impact risk - see above
Noted that JPL Sentry has posted 2018 PU23 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 QE risk assessment - see above
Grabbed MPEC 2018-Q38 - Daily Orbit Update - see above