Contents  on 21 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 21 August '18

Five objects reported inside ten LD

There are five minor planets reported inside ten lunar distances (LD) of our planet today. The closest of these is risk-listed 2018 QE, which is outbound from 2.93 to 3.36 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 yesterday 2018 QE 9 m  2.93 to 3.36 LD Aug. 10 - 29 NHATS target, risk
6.21 LD Aug. 9 2018 PN22 11 m  8.91 to 9.31 LD July 25 - Aug. 23 NHATS target
7.80 LD Aug. 23 2018 PU23 8 m  7.82 from 7.86 LD Aug. 7 - Sept. 13 NHATS target, risk
7.88 LD Aug. 18 2018 PK20 23 m  8.92 to 9.92 LD Aug. 15 - 22 NHATS target
9.36 LD Aug. 27 2018 LQ2 37 m  9.57 from 9.64 LD Aug. 17 - Sept. 6 NHATS target - DOU
Approaching Traffic
4.22 LD Aug. 29 1998 SD9 49 m  18.09 from 20.45 LD Aug. 25 - Sept. 2 radar target

This report was generated at 1720 UTC with follow-up in today's DOU MPEC for inbound 2018 LQ2.


<< Reading:  If you live around Glendale, Arizona, the American Meteor Society urges you to check your yard for meteorites from the poorly observed July 27th fireball. One has already been found "in a dense residential neighborhood."
        The Seismological Society of America (SSA) has a news item at Phys.org about the January 17th bolide over Michigan that was caught "by infrasonic microphones and seismometers, offering a rare chance to compare these data with satellite and ground camera images," and notes that the data suggests "researchers should be able to detect about 15 events of this size or larger each year in eastern North America."



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 21 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 1700 UTC when the database was dated 21 Aug.

NEOCP Activity  on 21 August '18

The MPC's NEO Confirmation Page has 53 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 53 objects listed. Of these, 25 were "one nighters." So far The Tracking News has counted a total of 57 listings on the NEOCP today.

New MPECs  on 21 August '18

Minor Planet Electronic Circulars

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


<< DOU on 21 Aug. '18 >>  MPEC 2018-Q40 - "12:04 UT" - Daily Orbit Update

Observers  on 21 August '18

Thirteen observers appear in today's MPEC.

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 2018 NE1
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2018-Q40 -- 2018 LQ2
T05ATLAS Haleakala in Hawaii, 18 in MPEC 2018-Q40 -- 2018 MM8, 2018 KE3, 1999 RB32, 438429, 376788, 31345, 253062, 21277, 18109, 17511, 17274, 17182, 162168, 140039, 136849, 6456, 5786, 4183
160Castelmartini Obs. in Italy, 14 in MPEC 2018-Q40 -- 2018 PL10, 2018 PJ10, 2018 NB, 2018 MM8, 2015 AX16, 2013 EP41, 2001 SC170, 1999 VQ11, 1999 RB32, 87311, 418929, 162168, 140039, 3552
J27El Guijo Obs. in Spain, 1 in MPEC 2018-Q40 -- 438429
Z43Landehen Obs., 2 in MPEC 2018-Q40 -- 2018 PW7, 2018 PJ10
C41MASTER-II Kislovodsk in Russia, 1 in MPEC 2018-Q40 -- 1999 RB32
711McDonald Obs. in Texas, 1 in MPEC 2018-Q40 -- 2018 LU15
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2018-Q40 -- 2018 PT20
C95SATINO-1 in France, 1 in MPEC 2018-Q40 -- 65996
Y00SONEAR in Brazil, 1 in MPEC 2018-Q40 -- 2018 NU3
B18Terskol Obs. in Russia, 1 in MPEC 2018-Q40 -- 144332
C51WISE in Earth polar orbit, 3 in MPEC 2018-Q40 -- 88263, 439313, 719
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 21 August '18

At last check (NEODyS at 2358 UTC) there was no risk monitoring news to report yet today. Visit the CRT to view activity in the last four weeks and our ephemerides page for a complete list of risk-rated objects under current observation or having recent news.

Chronology  on 21 August '18

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

1720Generated Traffic Report
1700Noted Radar Astrometry database update - see above
1430Grabbed MPEC 2018-Q40 - Daily Orbit Update - see above