2018-06-11 Tracking News

Contents on 11 June '18

Traffic Report -- five objects
IAU Minor Planet Center
- NEOCP Activity -- 36 listings
- New MPECs -- two MPECs
Observers -- 32 observers
Impact Risk Monitoring -- five objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 939 risk-listed objects, 28 have had news in the last 31 days. Updated at 1536 UTC on 11 June.
Ephemerides for risk-listed objects & close passers
News archive (old) & news image catalog (discontinued)
Object Links - mainly for radar targets & close passers (mostly discontinued)
Observing Campaigns (old)

The latest A/CC news is available via framed access, 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 11 June '18

Five objects reported inside ten LD

Five planetesimals are reported inside ten lunar distances (LD) of Earth today. Nearest are two outbound objects. 2018 LR2 moves away from 4.52 to 5.93 LD and 2018 EJ4 from 5.56 to 5.80 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
1.54 LD June 6	2018 LU2	16 m	9.98 to 12.15 LD	June 1 - 11	NHATS target, exits ten LD - DOU
1.57 LD June 14	2018 LD1	18 m	6.75 from 9.16 LD	yesterday - June 18	risk - DOU

3.93 LD June 9	2018 LR2	25 m	4.52 to 5.93 LD	June 5 - 14	DOU

5.56 LD yesterday	2018 EJ4	186 m	5.56 to 5.80 LD	June 4 - 16	radar/NHATS target - DOU
8.96 LD today	2015 DP155	162 m	8.96 LD	June 6 - 15	NHATS target, Earth closest at 0553 UTC - DOU

Approaching
7.62 LD June 15	2018 LK	152 m	13.18 from 15.54 LD	June 13 - 18	DOU

This report was generated at 1917 UTC with follow-up in today's DOU MPEC for all six close and approaching objects in the above table as well as for five departed objects: 2018 LU2, 2018 LL, 68347 2001 KB67, and risk-listed 2018 LE1 and 2018 LM.

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 11 June '18

The MPC's NEO Confirmation Page has 36 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 36 objects listed. Of these, seventeen were "one nighters." So far The Tracking News has counted a total of 38 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 11 June '18

Minor Planet Electronic Circulars

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

MPEC 2018-L52 time-stamped "12:03 UT" - Daily Orbit Update - see below
MPEC 2018-L53 time-stamped "14:52 UT" - Comet C/2018 EN4 (Neowise)

MPEC 2018-L53 - "14:52 UT" - Comet C/2018 EN4 (Neowise)

CK18E04N C/2018 EN4 (Neowise) (i=81.6°, q=1.448 AU, Q=35.380 AU, TP=2018 June 7.77930 TT) was picked up at 0206 UT on 9 March by WISE, observing it at March 9.09p1, 9.15p1, 9.22p1, 9.42p1, and 9.68p1. This detection was confirmed by Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (March 13.02-03p3), the Spacewatch 0.9m telescope (March 13.17-19p3), Schiaparelli Obs. (March 13.80-82p2 & June 9.90-91p3), Astronomical Research Obs. Westfield (March 14.10-11p3), Steward Obs. Mt. Lemmon Station (March 14.20-22p4), Hidetaka Sato via iTelescope Obs. Siding Spring (March 15.45p3), Mt. John Obs. (March 16.37p3), Joseph Masiero via Gemini South Obs. (March 17.00p4), Marco Micheli on Mauna Kea (March 22.29p4 & May 17.24-25p2), Hidetaka Sato via iTelescope Obs. Auberry (May 13.18p2), Hidetaka Sato via iTelescope Obs. Mayhill (May 14.14-15p3, 17.13-14p2, June 1.15p3 & 3.15p3), B. Lutkenhoner via Slooh.com Canary Islands Obs. (May 15.88-90p3 & June 5.91-92p3), and Stixendorf Obs. (June 4.89p2).

<< DOU on 11 June '18 >> MPEC 2018-L52 - "12:03 UT" - Daily Orbit Update

Observations of risk-listed objects
K18L01E 2018 LE1 (small asteroid, arc=6 days, H=27.5 ~11m, close passer, NHATS target) from Spacewatch 0.9m (June 11.23-25p3) and the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (June 11.27-28p4 at G=21.7-22.4)
K18L01D 2018 LD1 (small asteroid, arc=6 days, H=26.2 ~19m, close passer) from Spacewatch 0.9m (June 11.26p5)
K18L01B 2018 LB1 (Q=4.576 AU, arc=23 days, H=20.0 ~339m) from the Spacewatch 1.8m telescope (June 10.16-17p3), Pan-STARRS 1 (PS1) (June 10.33-37p4), CSS-Kuiper (June 11.20p3), and Spacewatch 0.9m (June 11.20-22p3)
K18L00M 2018 LM (small asteroid, arc=7 days, H=25.1 ~32m, close passer, NHATS target) from Spacewatch 0.9m (June 11.16-17p3) and Steward Mt. Lemmon Sta. (June 11.16p3)
K17K03B 2017 KB3 (small asteroid, arc=13 days, H=25.1 ~32m) from UH/Tholen NEO Follow-Up 2.24m Telescope (2017 May 26.36-38p2 at G=22.75-23.06 & 2017 May 27.33-34p3 at G=22.17-33)
Observations of close-passing objects
K18L02U 2018 LU2 (arc=4 days, H=26.6 ~16m, NHATS target) from Steward Mt. Lemmon Sta. (June 11.21p4)
K18L02R 2018 LR2 (arc=3 days, H=25.7 ~25m) from Great Shefford Obs. (June 11.05p2)
K18L00L 2018 LL (i=49.9°, arc=7 days, H=24.6 ~41m) from ARO Westfield (June 10.16-20p3 at V=23.0-2)
K18L00K 2018 LK (arc=56 days, H=21.8 ~148m) from Oberfrauendorf Obs. (June 10.92-93p3), Great Shefford Obs. (June 11.01p4), and Steward Mt. Lemmon Sta. (June 11.35p4)
K18E04J 2018 EJ4 (arc=89 days, H=21.4 ~178m, NHATS target, radar support) from Northolt Branch Obs. (June 8.93-94p12), SONEAR (June 10.04-05p3), and ATLAS Mauna Loa (June 10.37-39p4)
K15DF5P 2015 DP155 (arc=2 opp, H=21.4 ~178m, NHATS target) from ATLAS Haleakala (June 10.54-58p4)
68347 68347 2001 KB67 (radar support) from ATLAS Haleakala (June 10.48-51p4) and Chabot Obs. (June 11.20-22p4)
Observation campaigns (NHATS targets, radar support)
K18L03F 2018 LF3 (arc=3 days, H=25.7 ~25m, NHATS) from Spacewatch 1.8m (June 11.35p3)
K18L02V 2018 LV2 (arc=4 days, H=25.0 ~34m, NHATS) from Steward Mt. Lemmon Sta. (June 11.22-23p3)
K18L02Q 2018 LQ2 (arc=6 days, H=24.8 ~37m, NHATS) from Steward Mt. Lemmon Sta. (June 11.35p4)
K18L02M 2018 LM2 (arc=5 days, H=24.3 ~47m, NHATS) from Steward Mt. Lemmon Sta. (June 11.29p3)
K18L01J 2018 LJ1 (arc=6 days, H=26.5 ~17m, NHATS) from Steward Mt. Lemmon Sta. (June 11.31-32p4)
K18L01C 2018 LC1 (arc=6 days, H=24.7 ~39m, NHATS) from Steward Mt. Lemmon Sta. (June 11.19p4) and Spacewatch 0.9m (June 11.20p3)
K18L00C 2018 LC (arc=9 days, H=25.4 ~28m, NHATS) from Spacewatch 0.9m (June 11.27-29p3)
K18K02C 2018 KC2 (arc=21 days, H=22.8 ~93m, NHATS) from Spacewatch 1.8m (June 10.21-22p3 at R=21.9-22.2)
K18K01P 2018 KP1 (arc=22 days, H=25.1 ~32m, NHATS) from ARO Westfield (June 10.12-14p3 at V=22.1-3)
K17N00K 2017 NK (arc=2 opp, H=21.2 ~195m, NHATS) from the Mt. Lemmon Survey (MLS) (June 10.43-45p4) and Spacewatch 1.8m (June 10.46p3)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K18L02S 2018 LS2 (arc=5 days, H=22.3 ~117m) from Sormano Obs. (June 9.94-96p3)
K18L02N 2018 LN2 (arc=5 days, H=23.1 ~81m) from Steward Mt. Lemmon Sta. (June 11.34p4)
K18L01G 2018 LG1 (arc=5 days, H=23.3 ~74m) from MLS (June 10.27-29p4) and Steward Mt. Lemmon Sta. (June 11.18-19p4)
K18L01F 2018 LF1 (arc=6 days, H=24.5 ~43m) from Spacewatch 0.9m (June 10.35-36p3) and Steward Mt. Lemmon Sta. (June 11.34-35p4)
K18L00H 2018 LH (arc=8 days, H=24.0 ~54m) from Steward Mt. Lemmon Sta. (June 11.17-18p4)
K18L00G 2018 LG (arc=9 days, H=22.6 ~102m) from Steward Mt. Lemmon Sta. (June 11.25-26p4)
K18J02V 2018 JV2 (arc=30 days, H=23.7 ~62m) from Steward Mt. Lemmon Sta. (June 11.39p3)
K18J02S 2018 JS2 (arc=29 days, H=22.5 ~107m) from Spacewatch 1.8m (June 10.18p3 at R=21.8-22.2)
K18J02J 2018 JJ2 (Q=4.356 AU, arc=31 days, H=24.0 ~54m) from Spacewatch 1.8m (June 10.31p3)
K18J01Y 2018 JY1 (arc=32 days, H=23.5 ~68m) from Pan-STARRS 2 (PS2) (June 10.45-48p3)
K15J00P 2015 JP (arc=2 opp, H=22.8 ~93m) from ARO Westfield (June 10.18-21p3 at V=22.0-22.2)
K18K00L 2018 KL (arc=26 days, H=21.9 ~141m) from Spacewatch 0.9m (June 11.31-32p3)
Observations of other objects
K18L02P 2018 LP2 (arc=6 days, H=20.6 ~257m) from Steward Mt. Lemmon Sta. (June 11.32-34p3)
K18L02L 2018 LL2 (Q=4.219 AU, arc=17 days, H=20.2 ~309m) from Steward Mt. Lemmon Sta. (June 11.28-29p4)
K18L00N 2018 LN (arc=7 days, H=20.2 ~309m) from the Catalina Sky Survey (CSS) (June 10.31-32p4) and Steward Mt. Lemmon Sta. (June 11.19p4)
K18K03F 2018 KF3 (arc=16 days, H=19.8 ~371m) from Steward Mt. Lemmon Sta. (June 11.40p4)
K18K03D 2018 KD3 (arc=17 days, H=21.0 ~214m) from CSS-Kuiper (June 11.37p3 at G=22.6)
K18K02R 2018 KR2 (arc=21 days, H=19.1 ~513m) from Spacewatch 0.9m (June 11.46p3)
K18K02M 2018 KM2 (arc=21 days, H=20.4 ~282m) from Steward Mt. Lemmon Sta. (June 11.36-37p4)
K18K02L 2018 KL2 (arc=21 days, H=21.7 ~155m) from Steward Mt. Lemmon Sta. (June 11.36p4)
K18K02K 2018 KK2 (Q=4.468 AU, arc=25 days, H=18.3 ~741m) from Spacewatch 0.9m (June 11.17-19p3)
K18K01M 2018 KM1 (q=0.350 AU, arc=23 days, H=20.8 ~234m) from Steward Mt. Lemmon Sta. (June 11.31-32p4)
K18K00V 2018 KV (Q=4.391 AU, arc=59 days, H=17.1 ~1.29 km) from Steward Mt. Lemmon Sta. (June 11.37-40p4)
K18J05E 2018 JE5 (arc=27 days, H=20.6 ~257m) from Frasso Sabino Obs. (June 9.93-95p3) and Steward Mt. Lemmon Sta. (June 11.35p3)
K18J03C 2018 JC3 (arc=2 opp, H=20.0 ~339m) from PS1 (June 10.42-46p4)
K18J01S 2018 JS1 (Q=4.378 AU, arc=59 days, H=20.3 ~295m) from Steward Mt. Lemmon Sta. (June 11.37-38p4)
K18J01Q 2018 JQ1 (arc=34 days, H=21.4 ~178m) from Steward Mt. Lemmon Sta. (June 11.39p4)
K18J00F 2018 JF (arc=38 days, H=21.4 ~178m) from ARO Westfield (June 10.13-16p3 at V=22.1-5) and Spacewatch 0.9m (June 11.32-35p3)
K18F03S 2018 FS3 (arc=83 days, H=21.4 ~178m) from Spacewatch 1.8m (June 11.45-46p3)
K18B03L 2018 BL3 (arc=144 days, H=20.1 ~323m) from PS2 (June 10.53-57p4) and Steward Mt. Lemmon Sta. (June 11.45-46p3)
K18B02Y 2018 BY2 (arc=159 days, H=20.5 ~269m) from CSS (June 10.28-30p4) and Steward Mt. Lemmon Sta. (June 11.36-37p4)
K18A13L 2018 AL13 (arc=148 days, H=20.6 ~257m) from Spacewatch 0.9m (June 11.42-43p3)
K17W14H 2017 WH14 (arc=2 opp, H=18.0 ~851m) from the Palomar Transient Factory (PTF) (June 6.34-36p3 & 8.33-36p3) and Steward Mt. Lemmon Sta. (June 11.37-40p3)
K16L51E 2016 LE51 (q=0.371 AU, arc=4 opp, H=20.0 ~339m) from ARO Westfield (June 10.13-17p3 at V=22.1-3)
K15H10H 2015 HH10 (arc=4 opp, H=18.6 ~645m) from CSS (June 10.42-43p4) and Spacewatch 0.9m (June 11.45-46p3)
K14UJ2S 2014 US192 (arc=4 opp, H=18.8 ~589m) from Spacewatch 1.8m (June 10.19p3)
K14U00V 2014 UV (i=36.0°, arc=2 opp, H=20.5 ~269m) from ARO Westfield (June 10.23-25p3 at V=22.1-2)
K13Q10H 2013 QH10 (Q=4.789 AU, arc=2 opp, H=18.5 ~676m) from CSS (June 10.20-22p3)
K13N11T 2013 NT11 (i=53.5°, arc=3 opp, H=19.6 ~407m) from CSS-Kuiper (June 11.42-44p4 at G=21.2-22.4)
K12T52Z 2012 TZ52 (arc=4 opp, H=20.7 ~245m) from ARO Westfield (June 10.23-25p3 at V=23.1-6)
K12L11F 2012 LF11 (arc=3 opp, H=20.8 ~234m) from MLS (June 10.39-41p4)
K10LA8T 2010 LT108 (arc=5 opp, H=19.7 ~389m) from Spacewatch 1.8m (June 10.38-41p3 at R=21.5-22.1)
K05R00B 2005 RB (arc=3 opp, H=20.2 ~309m) from Spacewatch 1.8m (June 10.34-36p3)
K01SH0C 2001 SC170 (arc=2 opp, H=20.5 ~269m) from PTF (June 5.24-26p2, 5.31-32p2 & 7.23-30p6)
p8640 518640 2008 KZ5 from CSS (June 10.33-34p4)
p8635 518635 2008 HO3 from CSS (June 10.31-32p3)
p8469 518469 2005 LH8 from ATLAS Mauna Loa (June 10.56-58p4)
p8426 518426 2002 ON4 from CSS (June 10.29-30p4)
p6976 516976 2012 HM1 from ATLAS Haleakala (June 10.46-50p4)
p6420 516420 2003 FS2 from PTF (June 8.37-40p2) and ATLAS Haleakala (June 10.57-60p5)
o4711 504711 2009 SP171 from PTF (June 7.34-36p2)
n4999 494999 2010 JU39 from PS1 (June 10.28-30p3)
l4574 474574 2004 FG1 from PTF (June 7.35-36p2, 8.29p1, 8.33-38p4, 9.27-31p3 & 10.32-34p2)
l0310 470310 2007 LB15 from MLS (June 10.46p4)
k8910 468910 2014 KQ76 from PS1 (June 10.37-40p4)
k8909 468909 2014 KZ44 from PS1 (June 10.27-31p3)
k7309 467309 1996 AW1 from CSS (June 10.33-34p4) and ATLAS Haleakala (June 10.49-52p4)
k5892 465892 2010 UT7 from MLS (June 10.20-22p4 at G=20.6-22.2)
j5550 455550 2004 JO2 from ATLAS Haleakala (June 10.53-56p7)
j0648 450648 2006 UC63 from ATLAS Haleakala (June 10.45-49p8)
h9313 439313 2012 VE82 from PTF (June 7.20-21p4)
h6775 436775 2012 LC1 from ATLAS Mauna Loa (June 10.37-40p4)
f5029 415029 2011 UL21 from CSS (June 10.40-41p4) and MLS (June 10.41-42p4)
e5212 405212 2003 QC10 from ATLAS Mauna Loa (June 10.30-32p3)
b4851 374851 2006 VV2 from ATLAS Mauna Loa (June 10.26-29p4)
X8172 338172 2002 RV112 from PS1 (June 10.45-46p2)
X7084 337084 1998 SE36 from CSS (June 10.24-26p4)
S8592 288592 2004 JW20 from PS1 (June 10.38-41p3)
P3062 253062 2002 TC70 from Spacewatch 0.9m (June 11.42p3)
O2708 242708 2005 UK1 from SONEAR (June 10.08-09p3)
K8115 208115 2000 CT101 from ARO Westfield (June 10.19-24p3 at V=23.0-3)
J0161 190161 2005 TJ174 from ATLAS Mauna Loa (June 10.40-42p6)
G4121 164121 2003 YT1 from ATLAS Mauna Loa (June 10.25-27p4)
G3692 163692 2003 CY18 from MLS (June 10.16-18p4)
F4268 154268 2002 RM129 from ATLAS Haleakala (June 10.49-52p4)
F3957 153957 2002 AB29 from Frasso Sabino Obs. (June 9.99p6)
F2931 152931 2000 EA107 from ATLAS Haleakala (June 10.26-29p4)
E3637 143637 2003 LP6 from ARO Westfield (June 10.13-16p3 at V=22.0-22.1)
D9345 139345 2001 KA67 from ATLAS Haleakala (June 10.53-57p4) and Chabot Obs. (June 11.26-27p3)
D8847 138847 2000 VE62 from PTF (June 7.23-30p7) and Gravina Obs. (June 10.89-90p3)
D6839 136839 1997 WT22 from Spacewatch 0.9m (June 10.22p3) and ATLAS Mauna Loa (June 10.39-42p4)
96189 96189 Pygmalion (1991 NT3) from ATLAS Mauna Loa (June 10.48-51p3)
86324 86324 1999 WA2 from ATLAS Mauna Loa (June 10.52-53p3)
86067 86067 1999 RM28 from MLS (June 10.35p2)
85989 85989 1999 JD6 from PTF (June 7.20-24p6) and ATLAS Haleakala (June 10.38-40p3)
68350 68350 2001 MK3 from PTF (June 7.31-38p5, 7.43p1, 10.28p1 & 10.34-38p3) and MLS (June 10.34-35p4)
66391 66391 1999 KW4 from ATLAS Haleakala (June 10.41-45p4) and Gravina Obs. (June 10.86-88p6)
65706 65706 1992 NA from ATLAS Mauna Loa (June 10.60-62p4)
54401 54401 2000 LM from CSS (June 10.40-41p4)
53435 53435 1999 VM40 from PTF (June 8.23-25p2)
18882 18882 1999 YN4 from ATLAS Mauna Loa (June 10.54-57p4)
17511 17511 1992 QN from ATLAS Haleakala (June 10.59-60p4)
17274 17274 2000 LC16 from ATLAS Mauna Loa (June 10.48-50p6)
17181 17181 1999 UM3 from ATLAS Haleakala (June 10.27-30p6)
15745 15745 Yuliya (1991 PM5) from PTF (June 4.29-31p2, 4.35-36p2, 6.27p1, 6.34-38p4, 7.31-32p2 & 10.28-38p5) and ATLAS Haleakala (June 10.50-52p4)
11500 11500 Tomaiyowit (1989 UR) from CSS (June 10.40p2)
06456 6456 Golombek (1992 OM) from ATLAS Mauna Loa (June 10.55-58p4)
05011 5011 Ptah (6743 P-L) from PS1 (June 10.55-59p4)
01916 1916 Boreas (1953 RA) from ATLAS Mauna Loa (June 10.34-36p3)
01865 1865 Cerberus (1971 UA) from CSS (June 10.42-43p4) and MLS (June 10.45-46p4)
01685 1685 Toro (1948 OA) from ATLAS Mauna Loa (June 10.33-35p4)
01627 1627 Ivar (1929 SH) from CSS (June 10.27-28p4), ATLAS Haleakala (June 10.41-45p4), and Gravina Obs. (June 10.91-93p4)
00719 719 Albert (1911 MT) from PS2 (June 10.45-47p3)

Observers on 11 June '18

A total of 32 observers appear in today's MPECs.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 10 in MPECs 2018-L52 & 2018-L53 -- 2018 LL, 2018 KP1, 2018 JF, C/2018 EN4, 2016 LE51, 2015 JP, 2014 UV, 2012 TZ52, 208115, 143637
`T05`	ATLAS Haleakala in Hawaii, 16 in MPEC 2018-L52 -- 2015 DP155, 85989, 68347, 66391, 516976, 516420, 467309, 455550, 450648, 17511, 17181, 15745, 154268, 152931, 139345, 1627
`T08`	ATLAS Mauna Loa in Hawaii, 16 in MPEC 2018-L52 -- 2018 EJ4, 96189, 86324, 65706, 518469, 436775, 405212, 374851, 190161, 18882, 17274, 164121, 136839, 6456, 1916, 1685
`703`	Catalina Sky Survey (CSS) in Arizona, 14 in MPEC 2018-L52 -- 2018 LN, 2018 BY2, 2015 HH10, 2013 QH10, 54401, 518640, 518635, 518426, 467309, 415029, 337084, 11500, 1865, 1627
`V06`	Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 4 in MPEC 2018-L52 -- 2018 LE1, 2018 LB1, 2018 KD3, 2013 NT11
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2018-L53 -- C/2018 EN4
`G58`	Chabot Obs. in northern California, 2 in MPEC 2018-L52 -- 68347, 139345
`157`	Frasso Sabino Obs. in Italy, 2 in MPEC 2018-L52 -- 2018 JE5, 153957
`I114`	Joseph Masiero in southern California via Gemini South Obs. in Chile, 1 in MPEC 2018-L53 -- C/2018 EN4
`K73`	Gravina Obs. in Italy, 3 in MPEC 2018-L52 -- 66391, 138847, 1627
`J95`	Great Shefford Obs. in England, 2 in MPEC 2018-L52 -- 2018 LR2, 2018 LK
`U695`	Hidetaka Sato in Japan via iTelescope Obs. Auberry in northern California, 1 in MPEC 2018-L53 -- C/2018 EN4
`H06\|`	Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-L53 -- C/2018 EN4
`Q621`	Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-L53 -- C/2018 EN4
`568_`	Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2018-L53 -- C/2018 EN4
`474`	Mt. John Obs. in New Zealand, 1 in MPEC 2018-L53 -- C/2018 EN4
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 10 in MPEC 2018-L52 -- 2018 LG1, 2017 NK, 2012 LF11, 86067, 68350, 470310, 465892, 415029, 163692, 1865
`Z80`	Northolt Branch Obs. in England, 1 in MPEC 2018-L52 -- 2018 EJ4
`G34`	Oberfrauendorf Obs. in Germany, 1 in MPEC 2018-L52 -- 2018 LK
`I41`	Palomar Transient Factory (PTF) in southern California, 11 in MPEC 2018-L52 -- 2017 WH14, 2001 SC170, 85989, 68350, 53435, 516420, 504711, 474574, 439313, 15745, 138847
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 8 in MPEC 2018-L52 -- 2018 LB1, 2018 JC3, 494999, 468910, 468909, 338172, 288592, 5011
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 3 in MPEC 2018-L52 -- 2018 JY1, 2018 BL3, 719
`204`	Schiaparelli Obs. in Italy, 1 in MPEC 2018-L53 -- C/2018 EN4
`G409`	B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-L53 -- C/2018 EN4
`Y00`	SONEAR in Brazil, 2 in MPEC 2018-L52 -- 2018 EJ4, 242708
`587`	Sormano Obs. in Italy, 1 in MPEC 2018-L52 -- 2018 LS2
`691`	Spacewatch 0.9m telescope in Arizona, 16 in MPECs 2018-L52 & 2018-L53 -- 2018 LM, 2018 LF1, 2018 LE1, 2018 LD1, 2018 LC1, 2018 LC, 2018 LB1, 2018 KR2, 2018 KL, 2018 KK2, 2018 JF, C/2018 EN4, 2018 AL13, 2015 HH10, 253062, 136839
`291`	Spacewatch 1.8m telescope in Arizona, 10 in MPEC 2018-L52 -- 2018 LF3, 2018 LB1, 2018 KC2, 2018 JS2, 2018 JJ2, 2018 FS3, 2017 NK, 2014 US192, 2010 LT108, 2005 RB
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 29 in MPECs 2018-L52 & 2018-L53 -- 2018 LV2, 2018 LU2, 2018 LQ2, 2018 LP2, 2018 LN2, 2018 LN, 2018 LM2, 2018 LM, 2018 LL2, 2018 LK, 2018 LJ1, 2018 LH, 2018 LG1, 2018 LG, 2018 LF1, 2018 LC1, 2018 KV, 2018 KM2, 2018 KM1, 2018 KL2, 2018 KF3, 2018 JV2, 2018 JS1, 2018 JQ1, 2018 JE5, C/2018 EN4, 2018 BY2, 2018 BL3, 2017 WH14
`A71`	Stixendorf Obs. in Austria, 1 in MPEC 2018-L53 -- C/2018 EN4
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-L52 -- 2017 KB3
`C51`	WISE in Earth polar orbit, 1 in MPEC 2018-L53 -- C/2018 EN4

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 11 June '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 LE1	JPL Sentry	1535	2066-2102	3	3.394574e-06	-7.15	-7.15	0	JPL: Computed at 07:15 today Pacific time based on 39 observations spanning 5.8880 days (2018-Jun-05.39422 to 2018-Jun-11.28225). Diameter approximately 0.010 km. from weighted mean H=27.66.

2018 LD1	JPL Sentry	1535	2116-2116	1	7.895e-08	-8.09	-8.09	0	JPL: Computed at 07:13 today Pacific time based on 36 observations spanning 5.9242 days (2018-Jun-05.34064 to 2018-Jun-11.26486). Diameter approximately 0.018 km. from weighted mean H=26.38.

2018 LB1	JPL Sentry	1535	2032-2063	2	0.00011022058	-1.14	-1.14	1	JPL: Computed at 07:20 June 10th Pacific time based on 27 observations spanning 20.758 days (2018-May-19.425541 to 2018-Jun-09.18336). Diameter approximately 0.320 km. from weighted mean H=20.13.

2018 LM	JPL Sentry	1535	2112-2116	2	1.0037e-06	-6.56	-6.68	0	JPL: Computed at 07:19 today Pacific time based on 72 observations spanning 6.9152 days (2018-Jun-04.25437 to 2018-Jun-11.1696). Diameter approximately 0.032 km. from weighted mean H=25.15.

2017 KB3	JPL Sentry	1535	2100-2117	4	3.66747e-08	-7.78	-7.84	0	JPL: Computed at 07:07 today Pacific time based on 46 observations spanning 13.160 days (2017-May-17.21791 to 2017-May-30.378137). Diameter approximately 0.033 km. from weighted mean H=25.07.

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 11 June '18

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

1917	Generated Traffic Report
1634	Grabbed MPEC 2018-L53 - Comet C/2018 EN4 (Neowise) - see above
1535	Noted that JPL Sentry has updated its 2017 KB3 risk assessment - see above Noted that JPL Sentry has updated its 2018 LB1 risk assessment - see above Noted that JPL Sentry has reposted 2018 LD1 as an impact risk - see above Noted that JPL Sentry has updated its 2018 LE1 risk assessment - see above Noted that JPL Sentry has updated its 2018 LM risk assessment - see above Grabbed MPEC 2018-L52 - Daily Orbit Update - see above

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