2018-06-09 Tracking News

Contents on 9 June '18

Traffic Report -- two objects
IAU Minor Planet Center
- NEOCP Activity -- 18 listings
- New MPECs -- ten MPECs
Observers -- 42 observers
Impact Risk Monitoring -- three objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 939 risk-listed objects, 52 have had news in the last 31 days. Updated at 1600 UTC on 9 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 9 June '18

Two objects reported inside ten LD

Bulletin - 2203, updated 2308 & 2336 UTC: Two new discoveries of close passers have been announced.

Earth passage	I D	~Size	~Inside ten LD	Notes
1.54 LD at 1140 UTC June 6	2018 LU2	16 m	June 1 - 11	MPEC
3.93 LD at 2345 UTC today	2018 LR2	25 m	June 5 - 14	MPEC

Two small Solar-System bodies are known to be within ten lunar distances (LD) of Earth today. Nearest is 2018 EJ4, which moves in from 6.10 to 5.67 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
5.56 LD tomorrow	2018 EJ4	186 m	5.67 from 6.10 LD	June 4 - 16	radar/NHATS target - DOU
8.96 LD June 11	2015 DP155	162 m	9.05 from 9.23 LD	June 6 - 15	NHATS target - DOU

Approaching (sorted by 10-LD bubble entry date)
1.56 LD June 14	2018 LD1	18 m	11.59 from 14.04 LD	tomorrow - June 18	risk - DOU
7.62 LD June 15	2018 LK	148 m	18.03 from 20.60 LD	June 13 - 18	DOU

This report was generated at 2020 UTC with today's DOU MPEC posting follow-up for all four inbound or approaching objects, as you can see in the accompanying table. The DOU also has the recovery of recently departed (May 30th) 68347 2001 KB67 and follow-up for these departed objects: radar-observed 2017 VR12 (adding 83.74 days to its previous 126.76-day observing arc) and risk-listed objects 2018 LE1 and 2018 LM, plus the recovery of distant 2010 JO33 in April astrometry and March-April astrometry for distant 2003 FY6.

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. "Distant" is used here to describe objects that have come within ten LD since A/CC began these traffic reports (2007) but are not currently so close. 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 9 June '18

The MPC's NEO Confirmation Page has 18 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eighteen objects listed. Of these, six were "one nighters." So far The Tracking News has counted a total of 27 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 9 June '18

Minor Planet Electronic Circulars

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

MPEC 2018-L37 time-stamped "00:18 UT" - Comet C/2018 L2 (ATLAS) - see below
MPEC 2018-L38 time-stamped "03:01 UT" - 2009 QG34 - see below
MPEC 2018-L39 time-stamped "12:03 UT" - Daily Orbit Update - see below
MPEC 2018-L40 time-stamped "21:45 UT" - 2018 LP2 - see below
MPEC 2018-L41 time-stamped "21:49 UT" - 2018 LQ2 - see below
MPEC 2018-L42 time-stamped "21:53 UT" - 2018 LR2 - see below
MPEC 2018-L43 time-stamped "22:45 UT" - 2018 LS2 - see below
MPEC 2018-L44 time-stamped "22:49 UT" - 2018 LT2 - see below
MPEC 2018-L45 time-stamped "22:52 UT" - 2018 LU2 - see below
MPEC 2018-L46 time-stamped "22:55 UT" - 2018 LV2

MPEC 2018-L46 - "22:55 UT" - 2018 LV2

K18L02V 2018 LV2 (small asteroid, Earth MOID=4.5 LD, H=24.9 ~35m) was picked up at 0753 UT on 7 June by the Mt. Lemmon Survey (MLS), observing it at June 7.33-34p4. This detection was confirmed by Steward Obs. Mt. Lemmon Station (June 7.42p4, 8.21-22p4 & 9.28p4) and Great Shefford Obs. (June 9.04-05p3).

MPEC 2018-L45 - "22:52 UT" - 2018 LU2

K18L02U 2018 LU2 (small asteroid, Earth MOID=1.5 LD, H=26.6 ~16m) was picked up at 0723 UT on 7 June by the Palomar Transient Factory (PTF), observing it at June 7.31-32p4. This detection was confirmed by Steward Mt. Lemmon Sta. (June 7.38p4, 8.20p4 & 9.18p4), Great Shefford Obs. (June 9.01-02p4), Squirrel Valley Obs. (June 9.11-17p4), and Sormano Obs. (June 9.93p3).

MPEC 2018-L44 - "22:49 UT" - 2018 LT2

K18L02T 2018 LT2 (small asteroid, H=23.6 ~65m) was picked up at 0953 UT on 6 June by Pan-STARRS 1 (PS1), observing it at June 6.41-43p3. This detection was confirmed by Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (June 7.20-26p6 & 9.12-14p3), Mt. John Obs. (June 7.48-49p4), and the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (June 9.31-32p3).

MPEC 2018-L43 - "22:45 UT" - 2018 LS2

K18L02S 2018 LS2 (small asteroid, H=22.3 ~117m) was picked up at 0813 UT on 5 June by PS1, observing it at June 5.34-38p4. This detection was confirmed by Holmes/CTIO (June 7.18-19p3), the Spacewatch 1.8m telescope (June 7.35p3), Steward Mt. Lemmon Sta. (June 8.23-24p3), and Sandlot Obs. (June 9.17-21p3).

MPEC 2018-L42 - "21:53 UT" - 2018 LR2

K18L02R 2018 LR2 (small asteroid, Earth MOID=2.3 LD, H=25.7 ~25m) was picked up at 0854 UT on 8 June by the Catalina Sky Survey (CSS), observing it at June 8.37-39p4. This detection was confirmed by Steward Mt. Lemmon Sta. (June 8.44-45p8 & 9.38p3), Visnjan Obs. (June 8.89p2), Great Shefford Obs. (June 9.00-01p5), Astronomical Research Obs. Westfield (June 9.31-32p5), Sandlot Obs. (June 9.39-40p4), and Moriyama Obs. (June 9.63-64p3).

MPEC 2018-L41 - "21:49 UT" - 2018 LQ2

K18L02Q 2018 LQ2 (small asteroid, Earth MOID=10.0 LD, H=24.7 ~39m) was picked up at 0825 UT on 7 June by CSS, observing it at June 7.35-37p4. This detection was confirmed by PS1 (June 5.54-55p2), Steward Mt. Lemmon Sta. (June 7.43p4, 8.17-19p4 & 9.18p4), Sandlot Obs. (June 8.21-23p3 & 9.30-31p3), and McDonald Obs. (June 9.31-32p3).

MPEC 2018-L40 - "21:45 UT" - 2018 LP2

K18L02P 2018 LP2 (H=20.5 ~269m) was picked up at 0921 UT on 5 June by PS1, observing it at June 5.39-42p3. This detection was confirmed by the Spacewatch 0.9m telescope (June 6.22-26p3 & 7.27-28p2), Steward Mt. Lemmon Sta. (June 6.23-24p4 & 9.27-28p4), Spacewatch 1.8m (June 6.29-30p3), and Holmes/CTIO (June 7.24-25p3 & 9.15-16p3).

<< DOU on 9 June '18 >> MPEC 2018-L39 - "12:03 UT" - Daily Orbit Update

Observations of risk-listed objects
K18L01E 2018 LE1 (small asteroid, arc=4 days, H=27.4 ~11m, close passer, NHATS target) from PS1 (June 8.41-45p4) and Spacewatch 0.9m (June 9.18-19p2)
K18L01D 2018 LD1 (small asteroid, arc=4 days, H=26.2 ~19m, close passer) from Spacewatch 0.9m (June 9.20-21p3)
K18L01B 2018 LB1 (Q=4.576 AU, arc=21 days, H=20.1 ~323m) from Holmes/CTIO (June 9.03-04p3)
K18L00M 2018 LM (small asteroid, arc=5 days, H=25.1 ~32m, close passer, NHATS target) from Holmes/CTIO (June 8.04p3), Steward Mt. Lemmon Sta. (June 9.16p4), and Spacewatch 0.9m (June 9.17p3)
Observations of recently (no longer) risk-listed objects
K18K01B 2018 KB1 (arc=23 days, H=20.6 ~257m) from Steward Mt. Lemmon Sta. (June 9.43p4)
Observations of close-passing objects
K18L00K 2018 LK (arc=53 days, H=21.8 ~148m) from Tony Evans via Slooh.com Canary Islands Obs. (June 8.08-11p3)
K18E04J 2018 EJ4 (arc=87 days, H=21.3 ~186m, NHATS target, radar support) from Povegliano Veronese Obs. (June 1.89-90p4) and Pascoli Obs. (June 8.90-91p3)
K17V12R 2017 VR12 (arc=210 days, H=20.6 ~257m, NHATS target, radar support) from Holmes/CTIO (June 9.07-08p2)
K15DF5P 2015 DP155 (arc=2 opp, H=21.4 ~178m, NHATS target) from ATLAS Mauna Loa (June 8.53-55p3)
K10J33O 2010 JO33 (Q=4.007 AU, arc=3 opp, H=25.0 ~34m) from LCO Cerro Tololo C (April 5.07-09p3 at G=21.0-22.1 & 6.32-33p3 at G=20.7-8), LCO Siding Spring A (April 5.57-59p3 & 5.65-66p2), and LCO Cerro Tololo A (April 6.16-18p3 & 6.24-26p3)
K03F06Y 2003 FY6 (q=0.305 AU, arc=4 opp, H=22.4 ~112m) from LCO Siding Spring A (March 30.62-65p10 & April 5.62-63p3) and LCO Cerro Tololo C (March 31.19-22p10)
68347 68347 2001 KB67 (radar support) from MLS (June 8.32-33p3), ATLAS Mauna Loa (June 8.49-52p3), and M57 Obs. (June 8.92-95p4)
Observation campaigns (NHATS targets, radar support)
K18L01C 2018 LC1 (arc=4 days, H=24.7 ~39m, NHATS) from Steward Mt. Lemmon Sta. (June 9.16p4)
K18K01P 2018 KP1 (arc=20 days, H=25.1 ~32m, NHATS) from ARO Westfield (June 8.12-16p3 at V=22.1-5)
K18K01C 2018 KC1 (arc=21 days, H=25.6 ~26m, NHATS) from Holmes/CTIO (June 8.19-20p3)
K18G01L 2018 GL1 (arc=61 days, H=23.6 ~65m, NHATS) from Steward Mt. Lemmon Sta. (June 9.42p4)
K17X62C 2017 XC62 (arc=176 days, H=22.3 ~117m, NHATS) from Holmes/CTIO (June 8.13-14p3)
K13L07E 2013 LE7 (arc=2 opp, H=27.5 ~11m, NHATS) from Spacewatch 1.8m (June 9.33-37p3 at R=22.0-22.8)
K10G35C 2010 GC35 (arc=2 opp, H=24.6 ~41m, NHATS) from ARO Westfield (June 8.12-15p3 at V=23.0-4)
K08V15A 2008 VA15 (arc=3 opp, H=23.7 ~62m, NHATS) from the Sloan Digital Sky Survey (SDSS) (2002 Feb. 13.35p2)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K18L01G 2018 LG1 (arc=3 days, H=23.4 ~71m) from Steward Mt. Lemmon Sta. (June 9.16p4)
K18L01F 2018 LF1 (arc=4 days, H=24.6 ~41m) from Spacewatch 0.9m (June 9.19-20p3)
K18L00H 2018 LH (arc=5 days, H=24.0 ~54m) from Holmes/CTIO (June 8.05-07p3)
K18K02W 2018 KW2 (arc=15 days, H=24.4 ~45m) from Holmes/CTIO (June 8.21-22p3)
K18K02P 2018 KP2 (arc=16 days, H=24.5 ~43m) from Holmes/CTIO (June 8.29-32p3)
K18K02O 2018 KO2 (i=38.8°, arc=17 days, H=23.5 ~68m) from Holmes/CTIO (June 8.07p3)
K18J02V 2018 JV2 (arc=27 days, H=23.7 ~62m) from PS1 (June 8.43-45p3)
K18G05Q 2018 GQ5 (arc=56 days, H=22.8 ~93m) from Spacewatch 1.8m (June 9.45-46p2)
K18F01F 2018 FF1 (arc=83 days, H=23.6 ~65m) from ARO Westfield (June 8.20-22p2 at V=23.4-24.0)
K08G20U 2008 GU20 (arc=3 opp, H=22.9 ~89m) from SDSS (2000 May 3.30p2)
K13L28X 2013 LX28 (i=50.0°, arc=5 opp, H=21.8 ~148m) from PS1 (June 8.41-45p3)
Observations of other objects
K18L00J 2018 LJ (q=0.351 AU, Q=4.422 AU, arc=6 days, H=21.2 ~195m) from Steward Mt. Lemmon Sta. (June 9.17p4)
K18K02M 2018 KM2 (arc=19 days, H=20.4 ~282m) from Steward Mt. Lemmon Sta. (June 9.34-35p4)
K18K02L 2018 KL2 (arc=19 days, H=21.7 ~155m) from Steward Mt. Lemmon Sta. (June 9.34p3)
K18K00V 2018 KV (Q=4.391 AU, arc=56 days, H=17.1 ~1.29 km) from MLS (June 8.29-31p4)
K18K00T 2018 KT (arc=23 days, H=20.7 ~245m) from Spacewatch 0.9m (June 9.37p3)
K18J05E 2018 JE5 (arc=25 days, H=20.6 ~257m) from Steward Mt. Lemmon Sta. (June 9.35-37p4)
K18J01S 2018 JS1 (Q=4.378 AU, arc=56 days, H=20.3 ~295m) from CSS (June 8.29-31p3)
K18J01Q 2018 JQ1 (arc=32 days, H=21.4 ~178m) from Steward Mt. Lemmon Sta. (June 9.36-37p3)
K18J00E 2018 JE (arc=31 days, H=20.9 ~224m) from UH/Tholen NEO Follow-Up 2.24m Telescope (May 16.23p2)
K18H03T 2018 HT3 (Q=5.437 AU, arc=46 days, H=18.3 ~741m) from Holmes/CTIO (June 8.42-43p3)
K18H00H 2018 HH (Q=4.124 AU, arc=54 days, H=19.5 ~426m) from Holmes/CTIO (June 9.03-04p3)
K18G04Y 2018 GY4 (q=0.266 AU, arc=57 days, H=19.0 ~537m) from Holmes/CTIO (June 7.98-01p3 at V=22.2 & 8.98-00p3 at G=21.7-9)
K18G04J 2018 GJ4 (arc=57 days, H=21.7 ~155m) from Holmes/CTIO (June 9.09p2 at G=21.8-22.1)
K18F05Q 2018 FQ5 (arc=73 days, H=18.7 ~616m) from Holmes/CTIO (June 9.04p2)
K18F05H 2018 FH5 (arc=78 days, H=20.3 ~295m) from Holmes/CTIO (June 8.99p2)
K18E04Q 2018 EQ4 (arc=88 days, H=19.6 ~407m) from Spacewatch 0.9m (June 9.32-34p3)
K18B05J 2018 BJ5 (arc=137 days, H=21.6 ~162m) from Spacewatch 1.8m (June 8.35-38p3 at R=22.3)
K18B03L 2018 BL3 (arc=142 days, H=20.1 ~323m) from Steward Mt. Lemmon Sta. (June 9.35-36p3)
K17Y05F 2017 YF5 (arc=167 days, H=19.6 ~407m) from Holmes/CTIO (June 8.03p2)
K17W13R 2017 WR13 (Q=4.617 AU, arc=2 opp, H=19.6 ~407m) from Holmes/CTIO (June 8.38-40p3)
K17W01S 2017 WS1 (arc=203 days, H=20.2 ~309m) from Steward Mt. Lemmon Sta. (June 8.25-26p3 at G=21.1-22.7) and Spacewatch 0.9m (June 9.31-32p2)
K17Q17P 2017 QP17 (arc=2 opp, H=19.6 ~407m) from Spacewatch 0.9m (June 8.37p3 & 9.21-22p3)
K17L00A 2017 LA (i=41.7°, arc=2 opp, H=20.2 ~309m) from Spacewatch 1.8m (June 8.27-29p3)
K15P00M 2015 PM (arc=3 opp, H=20.5 ~269m) from Spacewatch 1.8m (June 8.39-41p3 & 9.39-41p3 at R=22.1-2) and CSS-Kuiper (June 9.38-39p2 at G=22.5-7)
K14Wa5G 2014 WG365 (arc=4 opp, H=20.0 ~339m) from LCO Sutherland C (June 6.97-98p8) and LCO Cerro Tololo A (June 7.35-39p7)
K14J78H 2014 JH78 (arc=3 opp, H=18.9 ~562m) from SDSS (2003 Jan. 25.30p2)
K13R21C 2013 RC21 (arc=4 opp, H=19.9 ~355m) from Spacewatch 1.8m (June 9.43-44p3)
K12L11F 2012 LF11 (arc=3 opp, H=20.8 ~234m) from Spacewatch 0.9m (June 9.42-43p3)
K06UL7K 2006 UK217 (i=41.1°, arc=3 opp, H=18.9 ~562m) from SDSS (2004 Dec. 13.10p3)
K01SH0C 2001 SC170 (arc=2 opp, H=20.5 ~269m) from CSS (June 8.29-31p4)
p8646 518646 2008 QD1 from Steward Mt. Lemmon Sta. (June 8.23-24p4)
p7103 517103 2013 EM20 from ESA Optical Ground Station (ESA OGS) (May 11.01-04p3)
p6976 516976 2012 HM1 from ATLAS Mauna Loa (June 8.47-51p4) and Squirrel Valley Obs. (June 9.07-08p3)
o4711 504711 2009 SP171 from MLS (June 8.33-35p4)
k7309 467309 1996 AW1 from ATLAS Mauna Loa (June 8.49-52p4)
j5550 455550 2004 JO2 from Squirrel Valley Obs. (June 9.18-21p3)
j0648 450648 2006 UC63 from ATLAS Mauna Loa (June 8.46-50p4)
h9313 439313 2012 VE82 from MLS (June 8.23-25p4)
f5029 415029 2011 UL21 from WISE (June 6.06p1, 6.19p1, 6.32p1, 6.45p1 & 6.52p1)
a4877 364877 2008 EM9 from PS1 (June 8.41-44p3)
X7228 337228 2000 FL1 from SDSS (2005 May 12.35p4)
R1480 271480 2004 FX31 from MLS (June 8.16-17p4)
P3062 253062 2002 TC70 from Spacewatch 0.9m (June 9.35-36p3)
K8115 208115 2000 CT101 from ARO Westfield (June 8.18-23p3 at V=23.0-1)
H7614 177614 2004 HK33 from Enrique Solano via Cerro Paranal (2009 Dec. 2.14-15p10)
G4201 164201 2004 EC from MLS (June 8.16-18p4)
F3957 153957 2002 AB29 from CSS (June 8.39-41p4)
E3637 143637 2003 LP6 from ARO Westfield (June 8.12-15p3 at V=22.0-22.2)
D9345 139345 2001 KA67 from M57 Obs. (June 8.96-99p4)
D8847 138847 2000 VE62 from CSS (June 8.29-31p4)
D6839 136839 1997 WT22 from ESA OGS (May 10.16-19p3)
A0004 100004 1983 VA from ESA OGS (May 10.03-05p3)
68950 68950 2002 QF15 from ATLAS Mauna Loa (June 8.61-62p4)
68350 68350 2001 MK3 from ATLAS Mauna Loa (June 8.53-56p4)
66391 66391 1999 KW4 from Fabra Obs. (June 8.85-86p8) and M57 Obs. (June 8.87-91p4)
37336 37336 2001 RM from CSS (June 8.43-45p4)
15745 15745 Yuliya (1991 PM5) from MLS (June 8.31-33p4) and ATLAS Mauna Loa (June 8.49-52p3)
03752 3752 Camillo (1985 PA) from CSS (June 8.20-22p4)
03552 3552 Don Quixote (1983 SA) from Campo Catino Austral Obs. (CAO) (June 8.39-42p3)
01866 1866 Sisyphus (1972 XA) from CSS (June 8.22-24p4)
01627 1627 Ivar (1929 SH) from Grorudalen Obs. (June 7.93-95p3) and ATLAS Mauna Loa (June 8.42-45p4)
00719 719 Albert (1911 MT) from PS1 (June 8.46-49p4)

MPEC 2018-L38 - "03:01 UT" - 2009 QG34

K09Q34G 2009 QG34 (Q=4.547 AU, H=19.5 ~426m) from Spacewatch 1.8m (March 20.47-49p3 at R=21.7-22.2) and Holmes/CTIO (May 19.04-07p3 at V=22.2-3 & June 8.00-02p3 at G=21.6-8)

MPEC 2018-L37 - "00:18 UT" - Comet C/2018 L2 (ATLAS)

CK18L020 C/2018 L2 (ATLAS) (i=67.7°, q=1.718 AU, TP=2018 Dec. 2.39688 TT) was picked up at 0758 UT on 6 June by ATLAS Mauna Loa, observing it at June 6.33-36p8. This detection was confirmed by Campo dos Amarais Obs. (June 4.07-08p2), Cruz del Sur Obs. (June 6.97-12p8 & 8.05-09p3), B. Lutkenhoner via Slooh.com Chile Obs. (June 6.98-99p3), Holmes/CTIO (June 6.99p4), SONEAR (June 7.02-05p4), Auger Obs. (June 7.03p3), Arcadia Obs. (June 7.36-38p4), Steven M. Tilley via iTelescope Obs. Siding Spring (June 7.62-64p4), Marian Urbanik via iTelescope Obs. Siding Spring (June 7.66p4), and Mt. John Obs. (June 8.36-37p3).

Observers on 9 June '18

A total of 42 observers appear in today's MPECs.

Code	Observer / observatory
`E23`	Arcadia Obs. in New South Wales, 1 in MPEC 2018-L37 -- C/2018 L2
`H21`	Astronomical Research Obs. Westfield in Illinois, 6 in MPECs 2018-L39 & 2018-L42 -- 2018 LR2, 2018 KP1, 2018 FF1, 2010 GC35, 208115, 143637
`T08`	ATLAS Mauna Loa in Hawaii, 10 in MPECs 2018-L37 & 2018-L39 -- C/2018 L2, 2015 DP155, 68950, 68350, 68347, 516976, 467309, 450648, 15745, 1627
`I47`	Auger Obs. in Argentina, 1 in MPEC 2018-L37 -- C/2018 L2
`W96`	Campo Catino Austral Obs. in Chile, 1 in MPEC 2018-L39 -- 3552
`X74`	Campo dos Amarais Obs., 1 in MPEC 2018-L37 -- C/2018 L2
`703`	Catalina Sky Survey (CSS) in Arizona, 9 in MPECs 2018-L39, 2018-L41 & 2018-L42 -- 2018 LR2, 2018 LQ2, 2018 JS1, 2001 SC170, 37336, 153957, 138847, 3752, 1866
`V06`	Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 2 in MPECs 2018-L39 & 2018-L44 -- 2018 LT2, 2015 PM
`309$`	Enrique Solano in Spain via Cerro Paranal in Chile, 1 in MPEC 2018-L39 -- 177614
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 22 in MPECs 2018-L37, 2018-L38, 2018-L39, 2018-L40, 2018-L43 & 2018-L44 -- 2018 LT2, 2018 LS2, 2018 LP2, 2018 LM, 2018 LH, 2018 LB1, C/2018 L2, 2018 KW2, 2018 KP2, 2018 KO2, 2018 KC1, 2018 HT3, 2018 HH, 2018 GY4, 2018 GJ4, 2018 FQ5, 2018 FH5, 2017 YF5, 2017 XC62, 2017 WR13, 2017 VR12, 2009 QG34
`I39`	Cruz del Sur Obs. in Argentina, 1 in MPEC 2018-L37 -- C/2018 L2
`J04`	ESA Optical Ground Station (ESA OGS) in the Canary Islands, 3 in MPEC 2018-L39 -- 517103, 136839, 100004
`006`	Fabra Obs. in Spain, 1 in MPEC 2018-L39 -- 66391
`J95`	Great Shefford Obs. in England, 3 in MPECs 2018-L42, 2018-L45 & 2018-L46 -- 2018 LV2, 2018 LU2, 2018 LR2
`238`	Grorudalen Obs. in Norway, 1 in MPEC 2018-L39 -- 1627
`Q622`	Marian Urbanik in Slovakia via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-L37 -- C/2018 L2
Q62`	Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-L37 -- C/2018 L2
`W85`	LCO Cerro Tololo A in Chile, 2 in MPEC 2018-L39 -- 2014 WG365, 2010 JO33
`W87`	LCO Cerro Tololo C in Chile, 2 in MPEC 2018-L39 -- 2010 JO33, 2003 FY6
`Q63`	LCO Siding Spring A in New South Wales, 2 in MPEC 2018-L39 -- 2010 JO33, 2003 FY6
`K93`	LCO Sutherland C in South Africa, 1 in MPEC 2018-L39 -- 2014 WG365
`K38`	M57 Obs. in Italy, 3 in MPEC 2018-L39 -- 68347, 66391, 139345
`711`	McDonald Obs. in Texas, 1 in MPEC 2018-L41 -- 2018 LQ2
`900`	Moriyama Obs. in Japan, 1 in MPEC 2018-L42 -- 2018 LR2
`474`	Mt. John Obs. in New Zealand, 2 in MPECs 2018-L37 & 2018-L44 -- 2018 LT2, C/2018 L2
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2018-L39 & 2018-L46 -- 2018 LV2, 2018 KV, 68347, 504711, 439313, 271480, 164201, 15745
`I41`	Palomar Transient Factory in southern California, 1 in MPEC 2018-L45 -- 2018 LU2
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 9 in MPECs 2018-L39, 2018-L40, 2018-L41, 2018-L43 & 2018-L44 -- 2018 LT2, 2018 LS2, 2018 LQ2, 2018 LP2, 2018 LE1, 2018 JV2, 2013 LX28, 364877, 719
`K63`	Pascoli Obs. in Italy, 1 in MPEC 2018-L39 -- 2018 EJ4
`A48`	Povegliano Veronese Obs. in Italy, 1 in MPEC 2018-L39 -- 2018 EJ4
`H36`	Sandlot Obs. in Kansas, 3 in MPECs 2018-L41, 2018-L42 & 2018-L43 -- 2018 LS2, 2018 LR2, 2018 LQ2
`645`	Sloan Digital Sky Survey (SDSS) in New Mexico, 5 in MPEC 2018-L39 -- 2014 JH78, 2008 VA15, 2008 GU20, 2006 UK217, 337228
`G403`	Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-L39 -- 2018 LK
`W883`	B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 1 in MPEC 2018-L37 -- C/2018 L2
`Y00`	SONEAR in Brazil, 1 in MPEC 2018-L37 -- C/2018 L2
`587`	Sormano Obs. in Italy, 1 in MPEC 2018-L45 -- 2018 LU2
`691`	Spacewatch 0.9m telescope in Arizona, 11 in MPECs 2018-L39 & 2018-L40 -- 2018 LP2, 2018 LM, 2018 LF1, 2018 LE1, 2018 LD1, 2018 KT, 2018 EQ4, 2017 WS1, 2017 QP17, 2012 LF11, 253062
`291`	Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2018-L38, 2018-L39, 2018-L40 & 2018-L43 -- 2018 LS2, 2018 LP2, 2018 GQ5, 2018 BJ5, 2017 LA, 2015 PM, 2013 RC21, 2013 LE7, 2009 QG34
`W34`	Squirrel Valley Obs. in North Carolina, 3 in MPECs 2018-L39 & 2018-L45 -- 2018 LU2, 516976, 455550
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 19 in MPECs 2018-L39, 2018-L40, 2018-L41, 2018-L42, 2018-L43, 2018-L45 & 2018-L46 -- 2018 LV2, 2018 LU2, 2018 LS2, 2018 LR2, 2018 LQ2, 2018 LP2, 2018 LM, 2018 LJ, 2018 LG1, 2018 LC1, 2018 KM2, 2018 KL2, 2018 KB1, 2018 JQ1, 2018 JE5, 2018 GL1, 2018 BL3, 2017 WS1, 518646
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-L39 -- 2018 JE
`L01`	Visnjan Obs., 1 in MPEC 2018-L42 -- 2018 LR2
`C51`	WISE in Earth polar orbit, 1 in MPEC 2018-L39 -- 415029

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

Impact Risk Monitoring on 9 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	1600	2066-2102	6	3.1176989e-06	-7.10	-7.11	0	JPL: Computed at 07:46 today Pacific time based on 27 observations spanning 3.7909 days (2018-Jun-05.39422 to 2018-Jun-09.18514). Diameter approximately 0.011 km. from weighted mean H=27.49.
2018 LE1	NEODyS	1600	2066-2118	24	4.21e-06	-6.95	-7.2	n/a	NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2018-06-05.395 to 2018-06-08.186."

2018 LD1	JPL Sentry	1600	2109-2109	1	1.409e-09	-9.83	-9.83	0	JPL: Computed at 07:42 today Pacific time based on 24 observations spanning 3.8679 days (2018-Jun-05.34064 to 2018-Jun-09.20852). Diameter approximately 0.018 km. from weighted mean H=26.43.
2018 LD1	NEODyS	1600	2088-2112	4	7.09e-09	-9.05	-9.34	0	NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2018-06-05.341 to 2018-06-08.196."

2018 LM	JPL Sentry	1600	2112-2116	2	4.955e-07	-6.86	-7.14	0	JPL: Computed at 07:50 today Pacific time based on 59 observations spanning 4.9160 days (2018-Jun-04.25437 to 2018-Jun-09.17039). Diameter approximately 0.032 km. from weighted mean H=25.14.
2018 LM	NEODyS	1600	2116	1	6.34e-08	-7.77	-7.77	0	NEODyS: "Based on 49 optical observations (of which 0 are rejected as outliers) from 2018-06-04.255 to 2018-06-08.205."

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 9 June '18

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

2306	Grabbed MPEC 2018-L43 - 2018 LS2 - see above Grabbed MPEC 2018-L44 - 2018 LT2 - see above Grabbed MPEC 2018-L45 - 2018 LU2 - see above Grabbed MPEC 2018-L46 - 2018 LV2 - see above
2202	Grabbed MPEC 2018-L40 - 2018 LP2 - see above Grabbed MPEC 2018-L41 - 2018 LQ2 - see above Grabbed MPEC 2018-L42 - 2018 LR2 - see above
2020	Generated Traffic Report
1600	Noted that JPL Sentry has updated its 2018 LD1 risk assessment - see above Noted that NEODyS has updated its 2018 LD1 risk assessment - see above Noted that JPL Sentry has updated its 2018 LE1 risk assessment - see above Noted that NEODyS has updated its 2018 LE1 risk assessment - see above Noted that JPL Sentry has updated its 2018 LM risk assessment - see above Noted that NEODyS has updated its 2018 LM risk assessment - see above Grabbed MPEC 2018-L39 - Daily Orbit Update - see above
0324	Grabbed MPEC 2018-L38 - 2009 QG34 - see above
0231	Grabbed MPEC 2018-L37 - Comet C/2018 L2 (ATLAS) - see above

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