Contents  on 31 May '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 31 May '18

One object reported inside ten LD

One small Solar-System body is reported inside ten lunar distances (LD) of our planet today. 2018 KN2 is outbound from 6.58 to 7.44 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
6.10 LD May 29 2018 KN2 27 m  6.58 to 7.44 LD May 25 - June 3
Approaching (sorted by 10-LD bubble entry date)
5.56 LD June 10 2018 EJ4 186 m  14.71 from 15.99 LD June 4 - 16 radar/NHATS target - DOU
8.96 LD June 11 2015 DP155 162 m  13.47 from 14.20 LD June 6 - 15 NHATS target - DOU

This report was generated at 1840 UTC with follow-up in today's DOU MPEC for approaching objects 2018 EJ4 and 2015 DP155.



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 31 May '18

The MPC's NEO Confirmation Page has 5 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five objects listed. Of these, two were "one nighters." So far The Tracking News has counted a total of thirteen 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 31 May '18

Minor Planet Electronic Circulars

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


MPEC 2018-K120 - "21:19 UT" - 2016 FX58


MPEC 2018-K119 - "21:11 UT" - 2015 KG172


MPEC 2018-K118 - "21:04 UT" - 2015 KF172


MPEC 2018-K117 - "16:35 UT" - Comet C/2018 K1 (Weiland)


MPEC 2018-K116 - "15:54 UT" - 2018 KJ3


MPEC 2018-K115 - "15:50 UT" - 2018 KH3


MPEC 2018-K114 - "14:45 UT" - 2015 VD164


MPEC 2018-K113 - "14:42 UT" - 2015 VC164


MPEC 2018-K112 - "14:39 UT" - 2015 VB164


MPEC 2018-K111 - "14:36 UT" - 2015 VA164


MPEC 2018-K110 - "14:33 UT" - 2015 RC277


MPEC 2018-K109 - "14:02 UT" - 2017 OF69


<< DOU on 31 May '18 >>  MPEC 2018-K108 - "12:02 UT" - Daily Orbit Update


MPEC 2018-K107 - "10:21 UT" - 2018 KE3


MPEC 2018-K106 - "10:14 UT" - 2018 KF3

Observers  on 31 May '18

A total of 39 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2018-K117 -- C/2018 K1
E23Arcadia Obs. in New South Wales, 1 in MPEC 2018-K117 -- C/2018 K1
H21Astronomical Research Obs. Westfield in Illinois, 6 in MPEC 2018-K108 -- 2018 JZ2, 2018 JW1, 2018 GM4, 2017 XJ62, 2017 SB14, 330659
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2018-K117 -- C/2018 K1
I47Auger Obs. in Argentina, 1 in MPEC 2018-K117 -- C/2018 K1
W96Campo Catino Austral Obs. (CAO) in Chile, 3 in MPECs 2018-K115, 2018-K116 & 2018-K117 -- 2018 KJ3, 2018 KH3, C/2018 K1
160Castelmartini Obs. in Italy, 1 in MPEC 2018-K108 -- 1981
V06Catalina Sky Survey Kuiper Telescope in Arizona, 1 in MPEC 2018-K115 -- 2018 KH3
807.Scott Sheppard via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2018-K118, 2018-K119 & 2018-K120 -- 2016 FX58, 2015 KG172, 2015 KF172
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2018-K107 & 2018-K115 -- 2018 KH3, 2018 KE3
W84!program code "!" (10) via DECam in Chile, 3 in MPECs 2018-K118, 2018-K119 & 2018-K120 -- 2016 FX58, 2015 KG172, 2015 KF172
G37Discovery Channel Telescope in Arizona, 1 in MPEC 2018-K109 -- 2017 OF69
734Farpoint Obs. in Kansas, 1 in MPEC 2018-K115 -- 2018 KH3
F659Marco Micheli via Faulkes Telescope North in Hawaii, 1 in MPEC 2018-K116 -- 2018 KJ3
372Geisei Obs. in Japan, 1 in MPEC 2018-K117 -- C/2018 K1
J77Golden Hill Obs. in England, 2 in MPECs 2018-K106 & 2018-K116 -- 2018 KJ3, 2018 KF3
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-K117 -- C/2018 K1
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 2 in MPECs 2018-K115 & 2018-K116 -- 2018 KJ3, 2018 KH3
Q62iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-K117 -- C/2018 K1
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-K117 -- C/2018 K1
Q622Marian Urbanik in Slovakia via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-K117 -- C/2018 K1
Q623Rolando Ligustri in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-K117 -- C/2018 K1
Q626Erik Bryssinck in Belgium via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-K117 -- C/2018 K1
Q62[M. Suzuki in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-K117 -- C/2018 K1
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-K117 -- C/2018 K1
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 2 in MPECs 2018-K115 & 2018-K116 -- 2018 KJ3, 2018 KH3
Z43Landehen Obs., 3 in MPEC 2018-K108 -- 66391, 139345, 138847
304Las Campanas Obs. in Chile, 4 in MPECs 2018-K109, 2018-K118, 2018-K119 & 2018-K120 -- 2017 OF69, 2016 FX58, 2015 KG172, 2015 KF172
Z21LCO Tenerife Aqawan A#1 in the Canary Islands, 1 in MPEC 2018-K108 -- 2018 EJ4
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2018-K115 & 2018-K116 -- 2018 KJ3, 2018 KH3
5685Scott Sheppard on Mauna Kea in Hawaii, 1 in MPEC 2018-K109 -- 2017 OF69
568@Jean-Marc Petit on Mauna Kea in Hawaii, 5 in MPECs 2018-K110, 2018-K111, 2018-K112, 2018-K113 & 2018-K114 -- 2015 VD164, 2015 VC164, 2015 VB164, 2015 VA164, 2015 RC277
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2018-K115 & 2018-K116 -- 2018 KJ3, 2018 KH3
I41Palomar Transient Factory in southern California, 1 in MPEC 2018-K108 -- 138847
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPECs 2018-K106, 2018-K116 & 2018-K117 -- 2018 KJ3, 2018 KF3, C/2018 K1
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-K106 -- 2018 KF3
C95SATINO-1 in France, 2 in MPECs 2018-K108 & 2018-K116 -- 2018 KT, 2018 KJ3
G40(program code "(" (17) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-K116 -- 2018 KJ3
W88"program code '"' (11) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2018-K117 -- C/2018 K1
W883B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 1 in MPEC 2018-K117 -- C/2018 K1
Y00SONEAR in Brazil, 1 in MPEC 2018-K117 -- C/2018 K1
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2018-K106, 2018-K115, 2018-K116 & 2018-K117 -- 2018 KJ3, 2018 KH3, 2018 KF3, C/2018 K1
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2018-K106 -- 2018 KF3
I52Steward Obs. Mt. Lemmon Station in Arizona, 4 in MPECs 2018-K106, 2018-K115, 2018-K116 & 2018-K117 -- 2018 KJ3, 2018 KH3, 2018 KF3, C/2018 K1
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-K108 -- 2018 CC14
K41Vegaquattro Obs. in Italy, 1 in MPEC 2018-K116 -- 2018 KJ3
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2018-K117 -- C/2018 K1
L01Visnjan Obs., 2 in MPECs 2018-K106 & 2018-K116 -- 2018 KJ3, 2018 KF3
C51WISE in Earth polar orbit, 4 in MPEC 2018-K108 -- 2018 HH, 2015 DP155, 2008 DG17, 518463
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 31 May '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 31 May '18

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

2206Grabbed MPEC 2018-K118 - 2015 KF172 - see above
Grabbed MPEC 2018-K119 - 2015 KG172 - see above
Grabbed MPEC 2018-K120 - 2016 FX58 - see above
1840Generated Traffic Report
1733Grabbed MPEC 2018-K117 - Comet C/2018 K1 (Weiland) - see above
1603Grabbed MPEC 2018-K115 - 2018 KH3 - see above
Grabbed MPEC 2018-K116 - 2018 KJ3 - see above
1535Grabbed MPEC 2018-K106 - 2018 KF3 - see above
Grabbed MPEC 2018-K107 - 2018 KE3 - see above
Grabbed MPEC 2018-K108 - Daily Orbit Update - see above
Grabbed MPEC 2018-K109 - 2017 OF69 - see above
Grabbed MPEC 2018-K110 - 2015 RC277 - see above
Grabbed MPEC 2018-K111 - 2015 VA164 - see above
Grabbed MPEC 2018-K112 - 2015 VB164 - see above
Grabbed MPEC 2018-K113 - 2015 VC164 - see above
Grabbed MPEC 2018-K114 - 2015 VD164 - see above