Contents  on 15 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 15 August '18

Four objects reported inside ten LD

Four minor planets are are reported inside ten lunar distances (LD) of our home world today, none of them closer than 2018 PM20, which is inbound from 8.80 to 8.18 LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 2.41, 5.0 & 10.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
1.36 LD Aug. 6 2018 PR7 7 m  8.64 to 9.60 LD July 26 - tomorrow NHATS target, risk
3.21 LD Aug. 10 2018 PM10 14 m  8.38 to 10.03 LD Aug. 5 - 15 exits ten LD
7.86 LD Aug. 18 2018 PK20 22 m  9.39 from 10.54 LD today - Aug. 22 NHATS target, enters ten LD
8.02 LD tomorrow 2018 PM20 18 m  8.18 from 8.80 LD Aug. 13 - 19
Approaching Traffic - sorted by 10-LD bubble entry date
9.36 LD Aug. 27 2018 LQ2 37 m  10.13 from 10.25 LD Aug. 17 - Sept. 6 NHATS target
4.22 LD Aug. 29 1998 SD9 49 m  32.47 from 34.91 LD Aug. 25 - Sept. 2

This report was generated at 2110 UTC with the discovery of already departed risk-listed 2018 PZ21 (MPEC), which passed Earth at 6.84 LD on August 3rd, and with follow-up in today's DOU MPEC for departed objects 2018 PO20 and 2018 PD9.


<< Reading:  The NEO community has lost a valued but little known member in the passing of Sonia Keys, a long-time staffer at the Minor Planet Center. See today's MPEC obituary and also comments from Paulo Holvorcem on the Minor Planet Mailing list.
        The journal Nature reports that NASA is funding an expansion of the Hawaii-based ATLAS sky survey into the southern hemisphere.
        Lowell Observatory has a news report at Phys.org about the new installation Lowell has at Meteor Crater in Arizona to participate in the NASA/Ames Cameras for All-sky Meteor Surveillance (CAMS) project. Its design uses a sixteen-camera fly-eye rather than a single-camera fisheye.
        Bad Astronomy is always interesting reading. Recently it told about ESA posting more than 100,000 images of comet 67P/Churyumov-Gerasimenko from the Rosetta mission OSIRIS camera, and there is a fascinating video to be seen here with comet C/2018 N1 (Neowise) and a whole bunch of asteroids in motion.



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 15 August '18

The MPC's NEO Confirmation Page has 92 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 92 objects listed. Of these, 24 were "one nighters." So far The Tracking News has counted a total of 108 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 15 August '18

Minor Planet Electronic Circulars

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


MPEC 2018-P120 - "19:11 UT" - 2018 PD22


MPEC 2018-P119 - "19:07 UT" - 2018 PC22


MPEC 2018-P118 - "19:03 UT" - 2018 PB22


MPEC 2018-P117 - "19:00 UT" - 2018 PA22


MPEC 2018-P116 - "18:56 UT" - 2018 PZ21


MPEC 2018-P115 - "18:52 UT" - 2018 PY21


MPEC 2018-P114 - "18:48 UT" - 2018 PX21


MPEC 2018-P113 - "18:44 UT" - 2018 PW21


MPEC 2018-P112 - "18:41 UT" - 2018 PV21


MPEC 2018-P111 - "18:37 UT" - 2018 PU21


MPEC 2018-P110 - "18:33 UT" - 2018 PT21


MPEC 2018-P109 - "15:52 UT" - Sonia Keys

Obituary for long-time IAU MPC staffer Sonia Keys, previously known as Kyle Smalley.


<< DOU on 15 Aug. '18 >>  MPEC 2018-P108 - "12:04 UT" - Daily Orbit Update

Observers  on 15 August '18

Seventeen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPECs 2018-P111, 2018-P113, 2018-P114, 2018-P115 & 2018-P118 -- 2018 PY21, 2018 PX21, 2018 PW21, 2018 PU21, 2018 PB22
T05ATLAS Haleakala in Hawaii, 6 in MPEC 2018-P108 -- 2015 QM3, 2012 OD1, 65996, 455550, 141527, 115052
T08ATLAS Mauna Loa in Hawaii, 19 in MPEC 2018-P108 -- 2018 PL8, 2018 KE3, 2009 SK104, 87311, 518640, 376788, 326386, 31345, 21277, 18882, 18109, 17511, 17274, 162168, 140039, 137125, 6456, 4183, 719
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 14 in MPECs 2018-P108, 2018-P110, 2018-P111, 2018-P112, 2018-P113, 2018-P114, 2018-P115, 2018-P116, 2018-P117, 2018-P119 & 2018-P120 -- 2018 PZ21, 2018 PY21, 2018 PX21, 2018 PW21, 2018 PV21, 2018 PU21, 2018 PT21, 2018 PD22, 2018 PC22, 2018 PA22, 2018 NE4, 2018 LP2, 2018 KM2, 2018 EM2
734Farpoint Obs. in Kansas, 2 in MPECs 2018-P111 & 2018-P113 -- 2018 PW21, 2018 PU21
W19Kalamazoo Obs. in Michigan, 1 in MPEC 2018-P108 -- 86324
568_Marco Micheli on Mauna Kea in Hawaii, 8 in MPECs 2018-P108, 2018-P112, 2018-P113, 2018-P114, 2018-P115, 2018-P116, 2018-P117 & 2018-P119 -- 2018 PZ21, 2018 PY21, 2018 PX21, 2018 PW21, 2018 PV21, 2018 PO20, 2018 PC22, 2018 PA22
474Mt. John Obs. in New Zealand, 1 in MPEC 2018-P110 -- 2018 PT21
I41Palomar Transient Factory in southern California, 1 in MPEC 2018-P108 -- 2002 OS4
F51Pan-STARRS 1 (PS1) in Hawaii, 26 in MPECs 2018-P108, 2018-P110, 2018-P111, 2018-P112, 2018-P113, 2018-P114, 2018-P115, 2018-P116, 2018-P117, 2018-P118, 2018-P119 & 2018-P120 -- 2018 PZ21, 2018 PY21, 2018 PX21, 2018 PW21, 2018 PV21, 2018 PU21, 2018 PT21, 2018 PL20, 2018 PD9, 2018 PD22, 2018 PC22, 2018 PB22, 2018 PA22, 2018 NU3, 2018 AL13, 2014 PG51, 2014 HM187, 2012 UV27, 2009 SK104, 2007 RX19, 68359, 445267, 306367, 178601, 140158, 137125
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-P113 -- 2018 PW21
C95SATINO-1 in France, 1 in MPEC 2018-P108 -- 13553
204Schiaparelli Obs. in Italy, 1 in MPEC 2018-P118 -- 2018 PB22
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2018-P118 -- 2018 PB22
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2018-P108 -- 162980
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-P108 -- 2018 PD9
L01Visnjan Obs., 1 in MPEC 2018-P116 -- 2018 PZ21
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 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 PZ21JPL Sentry20352045-2108208.358374e-05-4.99-5.200JPL: Computed at 13:18 today Pacific time based on 12 observations spanning 2.7172 days (2018-Aug-12.36837 to 2018-Aug-15.08559). Diameter approximately 0.015 km. from weighted mean H=26.72.
2018 PD9NEODyS1900R 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 15 August '18

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

2110Generated Traffic Report
2035Noted that JPL Sentry has posted 2018 PZ21 as an impact risk - see above
1930Grabbed MPEC 2018-P117 - 2018 PA22 - see above
Grabbed MPEC 2018-P118 - 2018 PB22 - see above
Grabbed MPEC 2018-P119 - 2018 PC22 - see above
Grabbed MPEC 2018-P120 - 2018 PD22 - see above
1900Noted that NEODyS has removed 2018 PD9 as an impact risk - see above
Grabbed MPEC 2018-P110 - 2018 PT21 - see above
Grabbed MPEC 2018-P111 - 2018 PU21 - see above
Grabbed MPEC 2018-P112 - 2018 PV21 - see above
Grabbed MPEC 2018-P113 - 2018 PW21 - see above
Grabbed MPEC 2018-P114 - 2018 PX21 - see above
Grabbed MPEC 2018-P115 - 2018 PY21 - see above
Grabbed MPEC 2018-P116 - 2018 PZ21 - see above
1630Grabbed MPEC 2018-P109 - Sonia Keys - see above
1530Grabbed MPEC 2018-P108 - Daily Orbit Update - see above