2018-05-23 Tracking News

Contents on 23 May '18

Traffic Report -- four objects
IAU Minor Planet Center
- NEOCP Activity -- 26 listings
- New MPECs -- nine MPECs
Observers -- 22 observers
Impact Risk Monitoring -- seven objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 937 risk-listed objects, 54 have had news in the last 31 days. Updated at 1508 UTC on 23 May.
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 23 May '18

Four objects reported inside ten LD

Four visitors are reported passing less than ten lunar distances (LD) from our home world today. Nearest is intruder 2018 KW1, which spends the whole day inside the Earth-Moon system. It moves in from 0.88 LD, passes the Moon at 0.57 LD at 0237 UTC, then reaches 0.39 LD from Earth at 1156 UTC, and moves away to 0.89 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
0.39 LD today	2018 KW1	4 m	0.39 LD	May 17 - 29	intruder today, NHATS target, Moon closest 0.57 LD at 0237 UTC, Earth closest at 1156 UTC - MPEC, DOU

2.05 LD yesterday	2018 KS	9 m	2.50 to 3.75 LD	May 16 - 27	NHATS target
2.24 LD May 21	2018 KF1	25 m	3.86 to 5.53 LD	May 16 - 26	risk - DOU

5.29 LD May 20	2018 JG1	43 m	7.63 to 9.06 LD	May 15 - 24	risk

Approaching (sorted by 10-LD bubble entry date)
9.50 LD May 29	68347 2001 KB67	371 m	18.06 from 20.68 LD	May 28 - 30	radar target
5.56 LD June 10	2018 EJ4	186 m	25.18 from 26.50 LD	June 4 - 16	radar/NHATS target - DOU
8.96 LD June 11	2015 DP155	162 m	19.77 from 20.60 LD	June 6 - 15	NHATS target - DOU

This report was generated at 2012 UTC with the discovery of just departed 2018 KD2 (MPEC), which flew by us at 2.24 LD on May 19th. 2018 KW1 had it's own follow-up MPEC and data in today's DOU MPEC, which also carries follow-up for three other objects in the active traffic table here plus four departed objects: 2018 KU, 2018 JY, 1999 FN19, and risk-listed 2018 JN.

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 23 May '18

The MPC's NEO Confirmation Page has 26 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 26 objects listed. Of these, thirteen were "one nighters." So far The Tracking News has counted a total of 36 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 23 May '18

Minor Planet Electronic Circulars

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

MPEC 2018-K68 time-stamped "00:44 UT" - 2018 KW1 - see below
MPEC 2018-K69 time-stamped "02:04 UT" - 2013 NP8 - see below
MPEC 2018-K70 time-stamped "02:05 UT" - 2017 EH1 - see below
MPEC 2018-K71 time-stamped "12:06 UT" - Daily Orbit Update - see below
MPEC 2018-K72 time-stamped "16:16 UT" - 2018 KC2 - see below
MPEC 2018-K73 time-stamped "16:24 UT" - 2018 KD2 - see below
MPEC 2018-K74 time-stamped "16:28 UT" - 2018 KE2 - see below
MPEC 2018-K75 time-stamped "17:04 UT" - 2010 GZ33 - see below
MPEC 2018-K76 time-stamped "17:06 UT" - 2014 MP60

MPEC 2018-K76 - "17:06 UT" - 2014 MP60

K14M60P 2014 MP60 (H=19.3 ~467m) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (May 20.32-36p3 at G=22.4-5 & 23.35-36p3 at G=21.5-6)

MPEC 2018-K75 - "17:04 UT" - 2010 GZ33

K10G33Z 2010 GZ33 (small asteroid, H=22.3 ~117m) from Holmes/CTIO (April 20.32-33p4 & May 23.29p3)

MPEC 2018-K74 - "16:28 UT" - 2018 KE2

K18K02E 2018 KE2 (small asteroid, H=25.8 ~23m) was picked up at 1031 UT on 21 May by Pan-STARRS 1 (PS1), observing it at May 21.44-47p4. This detection was confirmed by R. Wainscoat on Mauna Kea (May 22.29p3), Holmes/CTIO (May 23.09-10p3), the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (May 23.22-23p4), and the Spacewatch 0.9m telescope (May 23.29-31p2).

MPEC 2018-K73 - "16:24 UT" - 2018 KD2

K18K02D 2018 KD2 (Earth MOID=1.4 LD, H=25.7 ~25m) was picked up at 0749 UT on 21 May by ATLAS Mauna Loa, observing it at May 21.33-36p4 and 22.37-39p4. This detection was confirmed by Holmes/CTIO (May 21.95-96p3 & 23.09p3), Steward Obs. Mt. Lemmon Station (May 22.15p4 & 23.15p4), Arcadia Obs. (May 22.42-45p3), Wobblesock Obs. (May 22.45-46p3), and Spacewatch 0.9m (May 23.15-17p3).

MPEC 2018-K72 - "16:16 UT" - 2018 KC2

K18K02C 2018 KC2 (small asteroid, H=22.8 ~93m) was picked up at 1242 UT on 20 May by PS1, observing it at May 20.53-55p3. This detection was confirmed by Schwarzschild Obs. (May 20.97-98p3), Magdalena Ridge Obs. (MRO) (May 21.19-22p4), the Spacewatch 1.8m telescope (May 21.34-36p3), Steward Mt. Lemmon Sta. (May 21.40-41p4), CSS-Kuiper (May 22.33p3), and Holmes/CTIO (May 23.15-16p3).

<< DOU on 23 May '18 >> MPEC 2018-K71 - "12:06 UT" - Daily Orbit Update

Observations of risk-listed objects
K18K01F 2018 KF1 (small asteroid, arc=4 days, H=25.8 ~23m, close passer) from Northolt Branch Obs. (May 20.95-97p16), Great Shefford Obs. (May 22.04-06p5), and Steward Mt. Lemmon Sta. (May 22.39p4 & 23.43p4)
K18J05D 2018 JD5 (arc=8 days, H=19.0 ~537m) from Spacewatch 0.9m (May 22.43-45p3) and Steward Mt. Lemmon Sta. (May 23.44p3)
K18J02C 2018 JC2 (small asteroid, Q=4.602 AU, arc=14 days, H=22.8 ~93m) from UH/Tholen NEO Follow-Up 2.24m Telescope (May 22.36p3 at G=22.08-55) and Spacewatch 1.8m (May 23.18-23p3)
K18J00N 2018 JN (small asteroid, arc=18 days, H=25.0 ~34m, close passer) from Tholen 2.24m (May 22.51p3) and Spacewatch 1.8m (May 23.34-36p3)
K18H02J 2018 HJ2 (small asteroid, Q=4.015 AU, arc=29 days, H=24.5 ~43m) from Tholen 2.24m (May 22.45p4 at G=23.10-61)
Observations of recently (no longer) risk-listed objects
K18K01B 2018 KB1 (arc=6 days, H=20.6 ~257m) from Spacewatch 1.8m (May 23.41p3) and Steward Mt. Lemmon Sta. (May 23.43-44p4)
Observations of close-passing objects
K18K01W 2018 KW1 (arc=1 day, H=29.7 ~4m, NHATS target) from Steward Mt. Lemmon Sta. (May 23.16-27p22) and MRO (May 23.17-22p4)
K18K00U 2018 KU (arc=5 days, H=26.4 ~18m) from Steward Mt. Lemmon Sta. (May 23.42p4)
K18J00Y 2018 JY (arc=16 days, H=24.1 ~51m) from Spacewatch 1.8m (May 23.43-44p3)
K18E04J 2018 EJ4 (arc=70 days, H=21.3 ~186m, NHATS target, radar support) from M. Kumrucu-Lohmiller via Slooh.com Canary Islands Obs. (May 22.04-08p5), the Catalina Sky Survey (CSS) (May 22.32-34p4), and PS1 (May 22.45-47p3)
K15DF5P 2015 DP155 (arc=2 opp, H=21.5 ~170m, NHATS target) from Northolt Branch Obs. (May 21.99-01p6) and ATLAS Haleakala (May 22.47-51p4)
J99F19N 1999 FN19 (arc=2 opp, H=22.5 ~107m, NHATS target, radar support) from the Mt. Lemmon Survey (MLS) (May 22.35-36p3)
Observation campaigns (NHATS targets, radar support)
K18K00R 2018 KR (arc=6 days, H=26.5 ~17m, NHATS) from Steward Mt. Lemmon Sta. (May 23.32p4)
K18J01O 2018 JO1 (arc=15 days, H=25.0 ~34m, NHATS) from MLS (May 22.24-25p4), CSS-Kuiper (May 23.20-21p4), and Spacewatch 0.9m (May 23.23-26p3)
K17M08T 2017 MT8 (arc=2 opp, H=23.2 ~78m, NHATS) from CSS-Kuiper (May 23.44-45p3)
K17K34U 2017 KU34 (arc=2 opp, H=23.6 ~65m, NHATS) from Spacewatch 1.8m (May 23.15-16p3) and Steward Mt. Lemmon Sta. (May 23.18-20p4)
K15M54B 2015 MB54 (arc=2 opp, H=23.9 ~56m, NHATS) from Spacewatch 0.9m (May 23.45-46p3)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small asteroids (H>22.0)
K18K01Q 2018 KQ1 (arc=4 days, H=23.5 ~68m) from Steward Mt. Lemmon Sta. (May 23.38p4)
K18K01N 2018 KN1 (arc=4 days, H=23.3 ~74m) from CSS-Kuiper (May 23.24-25p3)
K18K01L 2018 KL1 (arc=4 days, H=22.2 ~123m) from Astronomical Research Obs. Westfield (May 22.34-35p3) and Steward Mt. Lemmon Sta. (May 23.37p4)
K18K01K 2018 KK1 (q=0.250 AU, arc=4 days, H=23.5 ~68m) from Steward Mt. Lemmon Sta. (May 23.22-23p3)
K18K00P 2018 KP (arc=6 days, H=22.3 ~117m) from CSS-Kuiper (May 23.23-24p4)
K18K00K 2018 KK (arc=7 days, H=25.2 ~31m) from Steward Mt. Lemmon Sta. (May 23.39p3)
K18K00H 2018 KH (arc=7 days, H=24.7 ~39m) from Steward Mt. Lemmon Sta. (May 23.24p3)
K18J03J 2018 JJ3 (arc=8 days, H=24.0 ~54m) from Steward Mt. Lemmon Sta. (May 23.29p4)
K18J02V 2018 JV2 (arc=11 days, H=23.7 ~62m) from Steward Mt. Lemmon Sta. (May 23.39-40p2)
K18J02J 2018 JJ2 (Q=4.362 AU, arc=13 days, H=24.1 ~51m) from MLS (May 22.24-26p4) and Steward Mt. Lemmon Sta. (May 23.28-29p4)
K18J02F 2018 JF2 (arc=14 days, H=24.1 ~51m) from Steward Mt. Lemmon Sta. (May 23.20p4)
K18J01Y 2018 JY1 (arc=14 days, H=23.6 ~65m) from MLS (May 22.24-25p4) and Steward Mt. Lemmon Sta. (May 23.25-26p3)
K18J01N 2018 JN1 (arc=15 days, H=22.3 ~117m) from CSS-Kuiper (May 23.19-20p4)
K18J01K 2018 JK1 (arc=14 days, H=24.4 ~45m) from ARO Westfield (May 22.19-21p3 at V=22.2-4)
K18G01T 2018 GT1 (arc=43 days, H=22.2 ~123m) from Steward Mt. Lemmon Sta. (May 23.36p4)
K18D02B 2018 DB2 (arc=87 days, H=22.1 ~129m) from Steward Mt. Lemmon Sta. (May 23.45p3)
J99L01K 1999 LK1 (arc=4 opp, H=22.1 ~129m) from ATLAS Mauna Loa (May 22.48-52p4)
Observations of other objects
K18K01M 2018 KM1 (q=0.351 AU, arc=4 days, H=20.8 ~234m) from ARO Westfield (May 22.33-34p9) and Steward Mt. Lemmon Sta. (May 23.31p4)
K18K01J 2018 KJ1 (Q=4.009 AU, arc=4 days, H=20.8 ~234m) from CSS-Kuiper (May 23.15p4)
K18K00V 2018 KV (Q=4.390 AU, arc=40 days, H=17.1 ~1.29 km) from Steward Mt. Lemmon Sta. (May 23.35p3)
K18J05E 2018 JE5 (arc=8 days, H=20.7 ~245m) from Steward Mt. Lemmon Sta. (May 23.35p4)
K18J03K 2018 JK3 (i=43.1°, arc=8 days, H=21.6 ~162m) from Steward Mt. Lemmon Sta. (May 23.35-36p4)
K18J03C 2018 JC3 (arc=40 days, H=20.1 ~323m) from Steward Mt. Lemmon Sta. (May 23.40-42p4)
K18J03A 2018 JA3 (arc=10 days, H=21.5 ~170m) from Steward Mt. Lemmon Sta. (May 23.16-18p4)
K18J02D 2018 JD2 (i=51.0°, q=0.214 AU, arc=14 days, H=18.8 ~589m) from MLS (May 22.20-21p4) and Steward Mt. Lemmon Sta. (May 23.21-22p4)
K18J01S 2018 JS1 (Q=4.380 AU, arc=40 days, H=20.3 ~295m) from Steward Mt. Lemmon Sta. (May 23.28p4)
K18J01P 2018 JP1 (arc=15 days, H=20.8 ~234m) from MLS (May 22.24-26p4) and Steward Mt. Lemmon Sta. (May 23.33p3)
K18J01E 2018 JE1 (arc=16 days, H=19.8 ~371m) from Steward Mt. Lemmon Sta. (May 23.28p4)
K18J00F 2018 JF (arc=19 days, H=21.4 ~178m) from MLS (May 22.20-21p4) and Steward Mt. Lemmon Sta. (May 23.21p4)
K18J00A 2018 JA (arc=20 days, H=20.4 ~282m) from CSS (May 22.23-25p4) and Steward Mt. Lemmon Sta. (May 23.23-24p4)
K18H03S 2018 HS3 (arc=27 days, H=20.6 ~257m) from Steward Mt. Lemmon Sta. (May 23.22p3)
K18G02G 2018 GG2 (i=43.3°, arc=2 opp, H=19.3 ~467m) from CSS-Kuiper (May 23.32-35p4)
K18F05Q 2018 FQ5 (arc=55 days, H=18.7 ~616m) from Campo dos Amarais Obs. (May 22.19-21p6) and Wobblesock Obs. (May 22.40-41p3)
K18F03S 2018 FS3 (arc=64 days, H=21.4 ~178m) from Steward Mt. Lemmon Sta. (May 23.15-16p4)
K18F03L 2018 FL3 (i=39.0°, arc=64 days, H=20.4 ~282m) from ARO Westfield (May 22.16-19p3 at V=22.1-4)
K18F01S 2018 FS1 (arc=66 days, H=20.8 ~234m) from CSS-Kuiper (May 23.20p4)
K18E04Q 2018 EQ4 (arc=71 days, H=19.6 ~407m) from Steward Mt. Lemmon Sta. (May 23.27-28p3)
K18B02Y 2018 BY2 (arc=140 days, H=20.5 ~269m) from Steward Mt. Lemmon Sta. (May 23.25-26p4)
K17W14H 2017 WH14 (arc=2 opp, H=18.1 ~812m) from Steward Mt. Lemmon Sta. (May 23.35-36p4)
K17V15L 2017 VL15 (arc=2 opp, H=21.2 ~195m) from Steward Mt. Lemmon Sta. (May 23.33-34p4)
K17S14B 2017 SB14 (arc=248 days, H=21.0 ~214m) from CSS-Kuiper (May 23.42-44p4 at G=21.5-22.3)
K17G05T 2017 GT5 (arc=2 opp, H=21.3 ~186m) from Steward Mt. Lemmon Sta. (May 23.40-42p3)
K16J00P 2016 JP (arc=3 opp, H=21.1 ~204m) from Steward Mt. Lemmon Sta. (May 23.24-25p4)
K16CQ4X 2016 CX264 (arc=2 opp, H=19.5 ~426m) from Steward Mt. Lemmon Sta. (May 23.20p4)
K15U67C 2015 UC67 (arc=2 opp, H=19.6 ~407m) from Spacewatch 1.8m (May 23.45-46p3)
K15RF0R 2015 RR150 (i=42.1°, arc=2 opp, H=19.7 ~389m) from CSS-Kuiper (May 22.44-45p4)
K11K09N 2011 KN9 (arc=3 opp, H=18.7 ~616m) from MLS (May 22.43-45p3)
K09O09O 2009 OO9 (q=0.305 AU, arc=7 opp, H=18.8 ~589m) from Spacewatch 1.8m (May 23.39p2)
K08J14P 2008 JP14 (arc=5 opp, H=19.3 ~467m) from MLS (May 22.17-19p4)
o8796 508796 2000 KN44 from ATLAS Mauna Loa (May 22.52-56p4)
n5615 495615 2015 PQ291 from ATLAS Mauna Loa (May 22.31-34p4)
m8461 488461 1996 FS1 from ARO Westfield (May 22.32-36p3 at V=23.0-1)
l5967 475967 2007 JF22 from ATLAS Mauna Loa (May 22.38-42p4)
k7309 467309 1996 AW1 from ATLAS Mauna Loa (May 22.54-57p4)
d9611 399611 2004 BE11 from CSS (May 22.19-21p2)
d7237 397237 2006 KZ112 from CSS (May 22.45-46p4)
b4851 374851 2006 VV2 from ATLAS Mauna Loa (May 22.30-33p4)
a5246 365246 2009 NE from CSS (May 22.45-46p4)
a3626 363626 2004 RA11 from ARO Westfield (May 22.31-35p3 at V=23.1-5)
O2643 242643 2005 NZ6 from ATLAS Mauna Loa (May 22.43-45p3)
M0839 220839 2004 VA from MLS (May 22.15-17p4)
H3664 173664 2001 JU2 from Steward Mt. Lemmon Sta. (May 22.43p3)
G4121 164121 2003 YT1 from ATLAS Mauna Loa (May 22.27-30p4)
G3243 163243 2002 FB3 from ATLAS Mauna Loa (May 22.28-31p4)
F4268 154268 2002 RM129 from MLS (May 22.32-34p4)
F2931 152931 2000 EA107 from ATLAS Haleakala (May 22.26-30p4)
D9345 139345 2001 KA67 from Northolt Branch Obs. (May 21.94-95p6)
D8847 138847 2000 VE62 from ATLAS Haleakala (May 22.48-50p3)
85989 85989 1999 JD6 from CSS (May 22.24-25p4)
85628 85628 1998 KV2 from ATLAS Mauna Loa (May 22.43-46p4)
68346 68346 2001 KZ66 from MLS (May 22.43-44p4)
36183 36183 1999 TX16 from ATLAS Mauna Loa (May 22.44-48p4)
25916 25916 2001 CP44 from ATLAS Mauna Loa (May 22.53-56p4)
15745 15745 Yuliya (1991 PM5) from SATINO-1 (May 10.85-13p61)
13553 13553 Masaakikoyama (1992 JE) from ATLAS Mauna Loa (May 22.59-62p3)
09856 9856 1991 EE from ATLAS Haleakala (May 22.30-34p4)
06455 6455 1992 HE from CSS (May 22.15-17p4)
05626 5626 1991 FE from ATLAS Mauna Loa (May 22.48-52p4)
03752 3752 Camillo (1985 PA) from CSS (May 22.22-23p4)
01866 1866 Sisyphus (1972 XA) from CSS (May 22.24-25p3) and ATLAS Haleakala (May 22.40-44p3)
01627 1627 Ivar (1929 SH) from MLS (May 22.24-26p4)
01036 1036 Ganymed (1924 TD) from ATLAS Mauna Loa (May 22.31-34p4)
00719 719 Albert (1911 MT) from ATLAS Mauna Loa (May 22.55-57p3)

MPEC 2018-K70 - "02:05 UT" - 2017 EH1

K17E01H 2017 EH1 (small asteroid, H=23.2 ~78m) from Tholen 2.24m (May 17.62p2 & 22.60p2)

MPEC 2018-K69 - "02:04 UT" - 2013 NP8

K13N08P 2013 NP8 (H=21.7 ~155m) from Holmes/CTIO (May 20.15-18p3 at G=23.1-3 & 22.07-12p3 at G=22.6-8)

MPEC 2018-K68 - "00:44 UT" - 2018 KW1

K18K01W 2018 KW1 (Earth MOID=0.4 LD, H=29.8 ~4m, NHATS target) from Great Shefford Obs. (May 22.91-92p4 & 22.98-99p3)

Observers on 23 May '18

A total of 22 observers appear in today's MPECs.

Code	Observer / observatory
`E23`	Arcadia Obs. in New South Wales, 1 in MPEC 2018-K73 -- 2018 KD2
`H21`	Astronomical Research Obs. Westfield in Illinois, 6 in MPEC 2018-K71 -- 2018 KM1, 2018 KL1, 2018 JK1, 2018 FL3, 488461, 363626
`T05`	ATLAS Haleakala in Hawaii, 5 in MPEC 2018-K71 -- 2015 DP155, 152931, 138847, 9856, 1866
`T08`	ATLAS Mauna Loa in Hawaii, 17 in MPECs 2018-K71 & 2018-K73 -- 2018 KD2, 1999 LK1, 85628, 508796, 495615, 475967, 467309, 374851, 36183, 25916, 242643, 164121, 163243, 13553, 5626, 1036, 719
`X74`	Campo dos Amarais Obs., 1 in MPEC 2018-K71 -- 2018 FQ5
`703`	Catalina Sky Survey (CSS) in Arizona, 9 in MPEC 2018-K71 -- 2018 JA, 2018 EJ4, 85989, 399611, 397237, 365246, 6455, 3752, 1866
`V06`	Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 12 in MPECs 2018-K71, 2018-K72 & 2018-K74 -- 2018 KP, 2018 KN1, 2018 KJ1, 2018 KE2, 2018 KC2, 2018 JO1, 2018 JN1, 2018 GG2, 2018 FS1, 2017 SB14, 2017 MT8, 2015 RR150
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPECs 2018-K69, 2018-K72, 2018-K73, 2018-K74, 2018-K75 & 2018-K76 -- 2018 KE2, 2018 KD2, 2018 KC2, 2014 MP60, 2013 NP8, 2010 GZ33
`J95`	Great Shefford Obs. in England, 2 in MPECs 2018-K68 & 2018-K71 -- 2018 KW1, 2018 KF1
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2018-K71 & 2018-K72 -- 2018 KW1, 2018 KC2
`568^`	R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2018-K74 -- 2018 KE2
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 13 in MPEC 2018-K71 -- 2018 JY1, 2018 JP1, 2018 JO1, 2018 JJ2, 2018 JF, 2018 JD2, 2011 KN9, 2008 JP14, 1999 FN19, 68346, 220839, 154268, 1627
`Z80`	Northolt Branch Obs. in England, 3 in MPEC 2018-K71 -- 2018 KF1, 2015 DP155, 139345
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 3 in MPECs 2018-K71, 2018-K72 & 2018-K74 -- 2018 KE2, 2018 KC2, 2018 EJ4
`C95`	SATINO-1 in France, 1 in MPEC 2018-K71 -- 15745
`033`	Schwarzschild Obs. in Germany, 1 in MPEC 2018-K72 -- 2018 KC2
`G40!`	M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-K71 -- 2018 EJ4
`691`	Spacewatch 0.9m telescope in Arizona, 5 in MPECs 2018-K71, 2018-K73 & 2018-K74 -- 2018 KE2, 2018 KD2, 2018 JO1, 2018 JD5, 2015 MB54
`291`	Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2018-K71 & 2018-K72 -- 2018 KC2, 2018 KB1, 2018 JY, 2018 JN, 2018 JC2, 2017 KU34, 2015 UC67, 2009 OO9
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 43 in MPECs 2018-K71, 2018-K72 & 2018-K73 -- 2018 KW1, 2018 KV, 2018 KU, 2018 KR, 2018 KQ1, 2018 KM1, 2018 KL1, 2018 KK1, 2018 KK, 2018 KH, 2018 KF1, 2018 KD2, 2018 KC2, 2018 KB1, 2018 JY1, 2018 JV2, 2018 JS1, 2018 JP1, 2018 JK3, 2018 JJ3, 2018 JJ2, 2018 JF2, 2018 JF, 2018 JE5, 2018 JE1, 2018 JD5, 2018 JD2, 2018 JC3, 2018 JA3, 2018 JA, 2018 HS3, 2018 GT1, 2018 FS3, 2018 EQ4, 2018 DB2, 2018 BY2, 2017 WH14, 2017 VL15, 2017 KU34, 2017 GT5, 2016 JP, 2016 CX264, 173664
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPECs 2018-K70 & 2018-K71 -- 2018 JN, 2018 JC2, 2018 HJ2, 2017 EH1
`E08`	Wobblesock Obs. in New South Wales, 2 in MPECs 2018-K71 & 2018-K73 -- 2018 KD2, 2018 FQ5

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

Impact Risk Monitoring on 23 May '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 KF1	JPL Sentry	1508	2101-2101	1	1.196e-06	-6.57	-6.57	0	JPL: Computed at 07:36 today Pacific time based on 151 observations spanning 4.1205 days (2018-May-19.30836 to 2018-May-23.42886). Diameter approximately 0.025 km. from weighted mean H=25.69.

2018 JD5	NEODyS	1508	R E M O V E D						-

2018 JC2	NEODyS	1508	R E M O V E D						-
2018 JC2	JPL Sentry	1508	2050-2050	1	5.405e-10	-8.08	-8.08	0	JPL: Computed at 07:18 today Pacific time based on 74 observations spanning 13.906 days (2018-May-09.32052 to 2018-May-23.2262). Diameter approximately 0.094 km. from weighted mean H=22.79.

2018 JN	JPL Sentry	1508	2100-2112	2	2.035e-06	-6.08	-6.35	0	JPL: Computed at 07:14 today Pacific time based on 131 observations spanning 17.933 days (2018-May-05.42349 to 2018-May-23.35674). Diameter approximately 0.033 km. from weighted mean H=25.05.

2018 HJ2	JPL Sentry	1508	2085-2085	1	1.689e-07	-6.77	-6.77	0	JPL: Computed at 07:09 today Pacific time based on 101 observations spanning 29.043 days (2018-Apr-23.41101 to 2018-May-22.454455). Diameter approximately 0.042 km. from weighted mean H=24.51.

2018 GL2	NEODyS	1508	2060-2112	7	7.63e-08	-6.73	-6.99	0	NEODyS: "Based on 71 optical observations (of which 0 are rejected as outliers) from 2018-04-11.236 to 2018-05-16.326."

2018 GE2	NEODyS	1508	2054-2117	229	7.59e-05	-5.39	-5.99	0	NEODyS: "Based on 105 optical observations (of which 4 are rejected as outliers) from 2018-04-10.411 to 2018-05-16.437."

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 23 May '18

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

2012	Generated Traffic Report
1900	Grabbed MPEC 2018-K72 - 2018 KC2 - see above Grabbed MPEC 2018-K73 - 2018 KD2 - see above Grabbed MPEC 2018-K74 - 2018 KE2 - see above Grabbed MPEC 2018-K75 - 2010 GZ33 - see above Grabbed MPEC 2018-K76 - 2014 MP60 - see above
1508	Noted that NEODyS has updated its 2018 GE2 risk assessment - see above Noted that NEODyS has updated its 2018 GL2 risk assessment - see above Noted that JPL Sentry has updated its 2018 HJ2 risk assessment - see above Noted that JPL Sentry has updated its 2018 JC2 risk assessment - see above Noted that NEODyS has removed 2018 JC2 as an impact risk - see above Noted that NEODyS has removed 2018 JD5 as an impact risk - see above Noted that JPL Sentry has updated its 2018 JN risk assessment - see above Noted that JPL Sentry has updated its 2018 KF1 risk assessment - see above Grabbed MPEC 2018-K71 - Daily Orbit Update - see above
0336	Grabbed MPEC 2018-K68 - 2018 KW1 - see above Grabbed MPEC 2018-K69 - 2013 NP8 - see above Grabbed MPEC 2018-K70 - 2017 EH1 - see above

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