2018-05-22 Tracking News

Contents on 22 May '18

Traffic Report -- five objects
IAU Minor Planet Center
- NEOCP Activity -- 27 listings
- New MPECs -- five MPECs
Observers -- 31 observers
Impact Risk Monitoring -- five 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 1639 UTC on 22 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 22 May '18

Five objects reported inside ten LD

Five transient natural objects are reported flying within ten lunar distances (LD) of Earth today. Nearest is newly announced intruder 2018 KW1, which, already just inside our planet's sphere of gravitational influence (SOI), enters the Earth-Moon system, coming in from distance of 2.40 to 0.88 LD from Earth. Also in the SOI, 2018 KS gets its closest to us this time around -- 2.05 LD at 0401 UTC.

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 tomorrow	2018 KW1	4 m	0.88 from 2.40 LD	May 17 - 29	NEW, intruder today, inside Earth SOI - MPEC

2.05 LD today	2018 KS	9 m	2.05 LD	May 16 - 27	NHATS target, Earth closest at 0401 UTC, Moon closest 1.59 LD at 0635 UTC
2.24 LD yesterday	2018 KF1	25 m	2.55 to 3.86 LD	May 16 - 26	risk - DOU

5.29 LD May 20	2018 JG1	43 m	6.43 to 7.63 LD	May 15 - 24	risk
8.70 LD May 19	2018 KQ	11 m	9.39 to 10.17 LD	May 17 - 22	exits ten LD

This report was generated at 2018 UTC with the discovery of inbound intruder 2018 KW1 (MPEC), and with follow-up in today's DOU MPEC for three objects in the accompanying traffic tables plus four more that have departed: 2018 KO1, 2018 KU, 2014 JR25, and risk-listed 2018 GE2, as well as distant 2002 JR100. We also note radar astrometry from May, March, and January posted late yesterday for 2018 BH3, 2017 VR12, 388945 2008 TZ3, and 1999 FN19.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage	I D	~Size	Distance today	Inside ten LD	Notes
9.50 LD May 29	68347 2001 KB67	371 m	20.68 from 23.41 LD	May 28 - 30	radar target
5.56 LD June 10	2018 EJ4	186 m	26.50 from 27.82 LD	June 4 - 16	radar/NHATS target - DOU
8.96 LD June 11	2015 DP155	162 m	20.60 from 21.43 LD	June 6 - 15	NHATS target - DOU

<< Reading: News items from the Sao Paulo Research Foundation (FAPESP), the Royal Astronomical Society (RAS), and the French National Center for Scientific Research (CNRS) accompany the publication of a science paper that concludes asteroidal object 514107 2015 BZ509 is the "first interstellar immigrant discovered in the Solar System." This is based on computer simulations indicating that the object could have been in a stable retrograde co-orbit with Jupiter since the end of planet formation some 4.5 billion years ago, and the simplest explanation for this is having been captured from a different star's planetary system. Two other science papers about this object can be found here and here. Update: Columnist Phil Plait is skeptical, as are others.

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 an object that has come within ten LD since A/CC began these traffic reports (2007) but is not presently 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 22 May '18

The MPC's NEO Confirmation Page has 27 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 27 objects listed. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 35 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 22 May '18

Minor Planet Electronic Circulars

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

MPEC 2018-K63 time-stamped "12:05 UT" - Daily Orbit Update - see below
MPEC 2018-K64 time-stamped "15:12 UT" - 2018 KU1 - see below
MPEC 2018-K65 time-stamped "15:15 UT" - 2018 KV1 - see below
MPEC 2018-K66 time-stamped "17:11 UT" - 2018 KW1 - see below
MPEC 2018-K67 time-stamped "23:25 UT" - 2018 KX1

MPEC 2018-K67 - "23:25 UT" - 2018 KX1

K18K01X 2018 KX1 (small asteroid, i=37.4°, H=23.0 ~85m) was picked up at 0509 UT on 21 May by the Mt. Lemmon Survey (MLS), observing it at May 21.22-23p4. This detection was confirmed by Magdalena Ridge Obs. (MRO) (May 21.31-33p4), Steward Obs. Mt. Lemmon Station (May 21.33p3 & 22.15p4), Schwarzschild Obs. (May 21.87-88p8 & 21.98p5), Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (May 21.96-98p3), and Great Shefford Obs. (May 21.97-99p3 & 22.94-95p3).

MPEC 2018-K66 - "17:11 UT" - 2018 KW1

K18K01W 2018 KW1 (Earth MOID=0.4 LD, H=29.8 ~4m) was picked up at 0439 UT on 22 May by MLS, observing it at May 22.19-21p4. This detection was confirmed by Steward Mt. Lemmon Sta. (May 22.24p4 & 22.33p4) and Xingming Obs. (May 22.66-67p2).

MPEC 2018-K65 - "15:15 UT" - 2018 KV1

K18K01V 2018 KV1 (small asteroid, H=24.4 ~45m) was picked up at 0848 UT on 20 May by MLS, observing it at May 20.37-38p4 at G=20.6-21.5 and 20.47p4 at G=21.7-22.5. This detection was confirmed by Steward Mt. Lemmon Sta. (May 20.45-46p3), Visnjan Obs. (May 20.95-96p3), MRO (May 21.17-20p4), Astronomical Research Obs. Westfield (May 22.22-23p2), and the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (May 22.33-34p4 at G=21.3-23.3).

MPEC 2018-K64 - "15:12 UT" - 2018 KU1

K18K01U 2018 KU1 (H=20.7 ~245m) was picked up at 0715 UT on 19 May by MLS, observing it at May 19.30-32p4. This detection was confirmed by MRO (May 19.36-37p4 & 21.14-16p4), Steward Mt. Lemmon Sta. (May 19.38-39p4 at G=20.6-21.0, 20.16p2 at G=20.5-9, 21.17p3 at G=19.8-20.7 & 22.16p3 at G=21.6-22.5), Schwarzschild Obs. (May 19.96-97p3, 20.03-05p5, 20.90-91p5 & 21.03p1), San Marcello Pistoiese Obs. (May 19.99-00p3), and Visnjan Obs. (May 20.84-85p3).

<< DOU on 22 May '18 >> MPEC 2018-K63 - "12:05 UT" - Daily Orbit Update

Observations of risk-listed objects
K18K01F 2018 KF1 (small asteroid, arc=2 days, H=25.8 ~23m, close passer) from Great Shefford Obs. (May 20.89p2, 20.99p3 & 21.09p3), Northolt Branch Obs. (May 20.95-97p16), Dettelbach Vineyard Obs. (May 20.99-03p11), and McCarthy Obs. (May 21.16p3)
K18K01B 2018 KB1 (arc=5 days, H=20.5 ~269m) from the Spacewatch 1.8m telescope (May 22.43-44p3)
K18J05D 2018 JD5 (arc=7 days, H=19.0 ~537m) from the Spacewatch 0.9m telescope (May 20.45p2 & 21.44-47p3) and Steward Mt. Lemmon Sta. (May 22.43p4)
K18G02L 2018 GL2 (small asteroid, arc=35 days, H=24.3 ~47m) from UH/Tholen NEO Follow-Up 2.24m Telescope (May 16.33p1 at G=24.86)
K18G02E 2018 GE2 (small asteroid, arc=36 days, H=27.0 ~13m, close passer, NHATS target) from Tholen 2.24m (May 16.40-44p4 at G=23.77-96)
Observations of recently (no longer) risk-listed objects
K18G05A 2018 GA5 (Q=4.919 AU, arc=39 days, H=18.2 ~776m) from Dettelbach Vineyard Obs. (May 22.07p3) and Steward Mt. Lemmon Sta. (May 22.40-41p8)
Observations of close-passing objects
K18K01O 2018 KO1 (arc=2 days, H=24.9 ~35m) from Arcadia Obs. (May 21.55-60p3)
K18K00U 2018 KU (arc=4 days, H=26.4 ~18m) from Steward Mt. Lemmon Sta. (May 22.22p2)
K18E04J 2018 EJ4 (arc=69 days, H=21.3 ~186m, NHATS target, radar support) from Dettelbach Vineyard Obs. (May 21.88-90p3)
K15DF5P 2015 DP155 (arc=2 opp, H=21.5 ~170m, NHATS target) from the Catalina Sky Survey (CSS) (May 22.28-29p4)
K14J25R 2014 JR25 (Q=4.196 AU, arc=2 opp, H=23.3 ~74m) from Pan-STARRS 1 (PS1) (May 21.50-53p4)
K02JA0R 2002 JR100 (arc=3 opp, H=24.3 ~47m, NHATS target) from MLS (May 21.26-28p4)
Observation campaigns (NHATS targets, radar support)
K18K01D 2018 KD1 (arc=4 days, H=24.5 ~43m, NHATS) from Steward Mt. Lemmon Sta. (May 22.26p4)
K18K00R 2018 KR (arc=5 days, H=26.5 ~17m, NHATS) from Steward Mt. Lemmon Sta. (May 22.23-24p4)
05604 5604 1992 FE (radar) from CSS (May 21.19-21p4) and ATLAS Mauna Loa (May 21.34-36p4)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K18K01E 2018 KE1 (arc=4 days, H=25.1 ~32m) from Steward Mt. Lemmon Sta. (May 22.22-23p3)
K18K00P 2018 KP (arc=5 days, H=22.4 ~112m) from Steward Mt. Lemmon Sta. (May 21.35-36p3 at G=20.7-22.2) and CSS-Kuiper (May 22.35p4 at G=21.2-22.1)
K18K00O 2018 KO (arc=5 days, H=26.1 ~20m) from Steward Mt. Lemmon Sta. (May 22.23p2 at G=21.5-22.8)
K18K00K 2018 KK (arc=6 days, H=25.2 ~31m) from Nonndorf Obs. (May 21.94p3) and Steward Mt. Lemmon Sta. (May 22.24-25p4)
K18K00H 2018 KH (arc=6 days, H=24.7 ~39m) from MLS (May 21.24-26p4) and Steward Mt. Lemmon Sta. (May 22.16-17p4)
K18J03J 2018 JJ3 (arc=7 days, H=24.0 ~54m) from PS1 (May 21.44-47p4) and Steward Mt. Lemmon Sta. (May 22.28p4)
K18J02V 2018 JV2 (arc=10 days, H=23.7 ~62m) from Steward Mt. Lemmon Sta. (May 22.29p4)
K18J02G 2018 JG2 (arc=12 days, H=23.9 ~56m) from Steward Mt. Lemmon Sta. (May 22.25p4)
K18J02F 2018 JF2 (arc=13 days, H=24.2 ~49m) from Steward Mt. Lemmon Sta. (May 22.21p4)
K18J01Y 2018 JY1 (arc=13 days, H=23.6 ~65m) from Steward Mt. Lemmon Sta. (May 22.28p4)
K18J01N 2018 JN1 (arc=14 days, H=22.3 ~117m) from Steward Mt. Lemmon Sta. (May 22.20p4)
K18G05Q 2018 GQ5 (arc=38 days, H=22.8 ~93m) from Steward Mt. Lemmon Sta. (May 22.43p2)
K18G01T 2018 GT1 (arc=42 days, H=22.2 ~123m) from Steward Mt. Lemmon Sta. (May 22.35-39p5 at G=20.1-22.7)
K18D02B 2018 DB2 (arc=86 days, H=22.1 ~129m) from MLS (May 21.39-40p4) and Steward Mt. Lemmon Sta. (May 22.44p2)
K15K19J 2015 KJ19 (arc=2 opp, H=22.4 ~112m) from MLS (May 21.24-26p4)
J99L01K 1999 LK1 (arc=4 opp, H=22.1 ~129m) from CSS (May 21.34-36p4) and ATLAS Mauna Loa (May 21.43-44p4)
K18K00L 2018 KL (arc=6 days, H=21.9 ~141m) from Steward Mt. Lemmon Sta. (May 22.26-27p3)
Observations of other objects
K18K01M 2018 KM1 (q=0.350 AU, arc=2 days, H=20.7 ~245m) from ATLAS Haleakala (May 21.48-50p3)
K18K00V 2018 KV (Q=4.390 AU, arc=39 days, H=17.1 ~1.29 km) from Steward Mt. Lemmon Sta. (May 22.44p2)
K18J05E 2018 JE5 (arc=7 days, H=20.7 ~245m) from PS1 (May 21.50-52p3) and Steward Mt. Lemmon Sta. (May 22.24-25p4)
K18J03K 2018 JK3 (i=43.2°, arc=7 days, H=21.6 ~162m) from Northolt Branch Obs. (May 20.98-99p3), Dettelbach Vineyard Obs. (May 22.01-03p4), and Steward Mt. Lemmon Sta. (May 22.31p3)
K18J03C 2018 JC3 (arc=39 days, H=20.1 ~323m) from PS1 (May 21.50-53p3) and Steward Mt. Lemmon Sta. (May 22.29-34p4)
K18J03B 2018 JB3 (i=40.4°, Q=0.882 AU, arc=12 days, H=17.5 ~1.07 km) from GINOP-KHK (May 21.03-04p4)
K18J03A 2018 JA3 (arc=9 days, H=21.5 ~170m) from Steward Mt. Lemmon Sta. (May 22.17-18p4)
K18J02D 2018 JD2 (i=51.0°, q=0.214 AU, arc=13 days, H=18.8 ~589m) from Steward Mt. Lemmon Sta. (May 22.27-28p3)
K18J01S 2018 JS1 (Q=4.380 AU, arc=39 days, H=20.3 ~295m) from M. Kumrucu-Lohmiller via Slooh.com Canary Islands Obs. (May 21.07p2) and Steward Mt. Lemmon Sta. (May 22.28-29p4)
K18J01Q 2018 JQ1 (arc=14 days, H=21.5 ~170m) from PS1 (May 21.44-48p4) and Steward Mt. Lemmon Sta. (May 22.28-29p4)
K18J01E 2018 JE1 (arc=15 days, H=19.8 ~371m) from Steward Mt. Lemmon Sta. (May 22.28-29p4)
K18J00F 2018 JF (arc=18 days, H=21.3 ~186m) from Steward Mt. Lemmon Sta. (May 22.36p4)
K18J00E 2018 JE (arc=18 days, H=20.9 ~224m) from Steward Mt. Lemmon Sta. (May 22.19p4)
K18J00A 2018 JA (arc=19 days, H=20.5 ~269m) from Steward Mt. Lemmon Sta. (May 22.20p4)
K18G04X 2018 GX4 (arc=40 days, H=19.2 ~490m) from Steward Mt. Lemmon Sta. (May 22.20-21p4)
K18G02Q 2018 GQ2 (arc=41 days, H=21.7 ~155m) from Steward Mt. Lemmon Sta. (May 22.18-19p4)
K18E04Q 2018 EQ4 (arc=70 days, H=19.6 ~407m) from MLS (May 21.30-32p4), Spacewatch 1.8m (May 22.37-38p3), and Steward Mt. Lemmon Sta. (May 22.43-44p4)
K18C02E 2018 CE2 (arc=104 days, H=20.5 ~269m) from Steward Mt. Lemmon Sta. (May 22.19p4)
K18B02Y 2018 BY2 (arc=138 days, H=20.5 ~269m) from MLS (May 21.26-28p4) and ATLAS Haleakala (May 21.44-48p8)
K18A00Z 2018 AZ (arc=144 days, H=21.1 ~204m) from Steward Mt. Lemmon Sta. (May 22.37p3)
K17G05T 2017 GT5 (arc=2 opp, H=21.3 ~186m) from Steward Mt. Lemmon Sta. (May 22.45-46p4)
K15Q03M 2015 QM3 (q=0.331 AU, arc=2 opp, H=20.3 ~295m) from Spacewatch 1.8m (May 21.43-46p3)
K15H11F 2015 HF11 (arc=2 opp, H=19.5 ~426m) from Spacewatch 0.9m (May 22.39-40p3)
K14T64F 2014 TF64 (i=52.7°, arc=3 opp, H=20.1 ~323m) from MLS (May 21.22-23p4)
K13Q10H 2013 QH10 (Q=4.789 AU, arc=2 opp, H=18.5 ~676m) from Purple Mtn. Obs. Xuyi Station (May 17.53-56p3)
K12F62N 2012 FN62 (Q=5.272 AU, arc=2 opp, H=17.7 ~977m) from MLS (May 21.22-24p4)
K08H03O 2008 HO3 (Q=4.815 AU, arc=3 opp, H=18.1 ~812m) from CSS (May 21.36-38p3) and PS1 (May 21.49-53p4)
K05Q05A 2005 QA5 (arc=4 opp, H=21.2 ~195m) from PS1 (May 21.45-48p3)
K04C01L 2004 CL1 (arc=3 opp, H=19.4 ~446m) from WISE (May 18.61p1, 18.68p1, 18.81p1, 18.88p1, 18.94p1, 19.01p1, 19.07p1 & 19.60p1)
K02O04N 2002 ON4 (arc=3 opp, H=19.0 ~537m) from MLS (May 21.30-32p4)
p6976 516976 2012 HM1 from CSS (May 21.34-36p4)
p3497 513497 2009 HB82 from CSS (May 21.15-16p4)
o8796 508796 2000 KN44 from PS1 (May 21.50-53p4)
o8767 508767 1993 BD2 from MLS (May 21.36-38p4)
n5615 495615 2015 PQ291 from CSS (May 21.15-16p4)
j0648 450648 2006 UC63 from ATLAS Haleakala (May 21.45-48p4)
i4193 444193 2005 SE71 from ATLAS Mauna Loa (May 21.30-33p4)
h6775 436775 2012 LC1 from ATLAS Mauna Loa (May 21.43-46p4)
h6763 436763 2012 FN52 from PS1 (May 21.49-53p3)
g4482 424482 2008 DG5 from WISE (May 20.90p1, 21.03p1, 21.16p1, 21.36p1 & 21.42p1)
d5143 395143 2010 CN1 from PS1 (May 21.49-53p3)
b4851 374851 2006 VV2 from CSS (May 21.15-16p4)
a1754 361754 2007 YV29 from MLS (May 21.21-23p3)
Y8400 348400 2005 JF21 from MLS (May 21.21-23p4)
O2708 242708 2005 UK1 from PS1 (May 21.57-60p3)
O2643 242643 2005 NZ6 from Xuyi Sta. (May 17.58-61p3)
M0839 220839 2004 VA from SONEAR (May 20.96p3) and ATLAS Haleakala (May 21.36-39p4)
I6822 186822 2004 FE31 from CSS (May 21.28-30p2)
H2034 172034 2001 WR1 from CSS (May 21.17-19p4)
G2854 162854 2001 DE47 from Xuyi Sta. (May 15.75-77p2)
E2040 142040 2002 QE15 from Rand II Obs. (2017 July 6.13-15p4, 2017 July 7.13-14p3 & 2017 July 18.13p4)
D9359 139359 2001 ME1 from CSS (May 21.34-36p3)
D8847 138847 2000 VE62 from Rand II Obs. (April 24.05p4, May 8.07-08p4, 9.12p4 & 10.16-17p4), Landehen Obs. (May 19.88-91p7), and The Studios Obs. (May 21.90-99p6)
D6839 136839 1997 WT22 from Xuyi Sta. (May 17.74-77p3)
B5052 115052 2003 RD6 from WISE (May 17.94p1, 18.53p1, 18.99p1, 19.05p1, 19.19p1, 19.38p2, 19.51p1, 19.64p1 & 19.77p1)
A0004 100004 1983 VA from PS1 (May 21.45-48p3)
88254 88254 2001 FM129 from Spacewatch 0.9m (May 21.17-18p3)
86666 86666 2000 FL10 from Xuyi Sta. (May 15.75-77p2)
85628 85628 1998 KV2 from CSS (May 21.30-32p4)
85490 85490 1997 SE5 from Xuyi Sta. (May 17.59-61p2)
68348 68348 2001 LO7 from CSS (May 21.19-21p4) and ATLAS Mauna Loa (May 21.32-34p4)
66391 66391 1999 KW4 from CSS (May 21.41-43p4)
65996 65996 1998 MX5 from PS1 (May 21.57-60p4)
36183 36183 1999 TX16 from CSS (May 21.32-34p4)
25916 25916 2001 CP44 from Landehen Obs. (May 19.92-95p6) and CSS (May 21.39-41p4)
24761 24761 Ahau (1993 BW2) from ATLAS Haleakala (May 21.48-51p4)
18882 18882 1999 YN4 from ATLAS Mauna Loa (May 21.59-61p4)
15745 15745 Yuliya (1991 PM5) from ATLAS Haleakala (May 21.51-54p4)
06569 6569 Ondaatje (1993 MO) from CSS (May 21.41-43p4)
05646 5646 1990 TR from ATLAS Mauna Loa (May 21.41-44p4)
05626 5626 1991 FE from Xuyi Sta. (May 17.69-72p3) and CSS (May 21.37-38p4)
01685 1685 Toro (1948 OA) from CSS (May 21.24-25p4) and ATLAS Mauna Loa (May 21.37-39p4)
01627 1627 Ivar (1929 SH) from ATLAS Haleakala (May 21.45-48p4)

Observers on 22 May '18

A total of 31 observers appear in today's MPECs.

Code	Observer / observatory
`E23`	Arcadia Obs. in New South Wales, 1 in MPEC 2018-K63 -- 2018 KO1
`H21`	Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2018-K65 -- 2018 KV1
`T05`	ATLAS Haleakala in Hawaii, 7 in MPEC 2018-K63 -- 2018 KM1, 2018 BY2, 450648, 24761, 220839, 15745, 1627
`T08`	ATLAS Mauna Loa in Hawaii, 8 in MPEC 2018-K63 -- 1999 LK1, 68348, 444193, 436775, 18882, 5646, 5604, 1685
`703`	Catalina Sky Survey (CSS) in Arizona, 19 in MPEC 2018-K63 -- 2015 DP155, 2008 HO3, 1999 LK1, 85628, 68348, 66391, 516976, 513497, 495615, 374851, 36183, 25916, 186822, 172034, 139359, 6569, 5626, 5604, 1685
`V06`	Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 2 in MPECs 2018-K63 & 2018-K65 -- 2018 KV1, 2018 KP
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2018-K67 -- 2018 KX1
`K87`	Dettelbach Vineyard Obs. in Germany, 4 in MPEC 2018-K63 -- 2018 KF1, 2018 JK3, 2018 GA5, 2018 EJ4
`K88`	GINOP-KHK in Hungary, 1 in MPEC 2018-K63 -- 2018 JB3
`J95`	Great Shefford Obs. in England, 2 in MPECs 2018-K63 & 2018-K67 -- 2018 KX1, 2018 KF1
`Z43`	Landehen Obs., 2 in MPEC 2018-K63 -- 25916, 138847
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2018-K64, 2018-K65 & 2018-K67 -- 2018 KX1, 2018 KV1, 2018 KU1
`932`	McCarthy Obs. in Connecticut, 1 in MPEC 2018-K63 -- 2018 KF1
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 16 in MPECs 2018-K63, 2018-K64, 2018-K65, 2018-K66 & 2018-K67 -- 2018 KX1, 2018 KW1, 2018 KV1, 2018 KU1, 2018 KH, 2018 EQ4, 2018 DB2, 2018 BY2, 2015 KJ19, 2014 TF64, 2012 FN62, 2002 ON4, 2002 JR100, 508767, 361754, 348400
`C47`	Nonndorf Obs. in Austria, 1 in MPEC 2018-K63 -- 2018 KK
`Z80`	Northolt Branch Obs. in England, 2 in MPEC 2018-K63 -- 2018 KF1, 2018 JK3
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 13 in MPEC 2018-K63 -- 2018 JQ1, 2018 JJ3, 2018 JE5, 2018 JC3, 2014 JR25, 2008 HO3, 2005 QA5, 65996, 508796, 436763, 395143, 242708, 100004
`D29`	Purple Mtn. Obs. Xuyi Station in China, 7 in MPEC 2018-K63 -- 2013 QH10, 86666, 85490, 242643, 162854, 136839, 5626
`W71`	Rand II Obs. in New York, 2 in MPEC 2018-K63 -- 142040, 138847
`104`	San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-K64 -- 2018 KU1
`033`	Schwarzschild Obs. in Germany, 2 in MPECs 2018-K64 & 2018-K67 -- 2018 KX1, 2018 KU1
`G40!`	M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-K63 -- 2018 JS1
`Y00`	SONEAR in Brazil, 1 in MPEC 2018-K63 -- 220839
`691`	Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2018-K63 -- 2018 JD5, 2015 HF11, 88254
`291`	Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2018-K63 -- 2018 KB1, 2018 EQ4, 2015 QM3
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 42 in MPECs 2018-K63, 2018-K64, 2018-K65, 2018-K66 & 2018-K67 -- 2018 KX1, 2018 KW1, 2018 KV1, 2018 KV, 2018 KU1, 2018 KU, 2018 KR, 2018 KP, 2018 KO, 2018 KL, 2018 KK, 2018 KH, 2018 KE1, 2018 KD1, 2018 JY1, 2018 JV2, 2018 JS1, 2018 JQ1, 2018 JN1, 2018 JK3, 2018 JJ3, 2018 JG2, 2018 JF2, 2018 JF, 2018 JE5, 2018 JE1, 2018 JE, 2018 JD5, 2018 JD2, 2018 JC3, 2018 JA3, 2018 JA, 2018 GX4, 2018 GT1, 2018 GQ5, 2018 GQ2, 2018 GA5, 2018 EQ4, 2018 DB2, 2018 CE2, 2018 AZ, 2017 GT5
`Z52`	The Studios Obs., 1 in MPEC 2018-K63 -- 138847
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2018-K63 -- 2018 GL2, 2018 GE2
`L01`	Visnjan Obs., 2 in MPECs 2018-K64 & 2018-K65 -- 2018 KV1, 2018 KU1
`C51`	WISE in Earth polar orbit, 3 in MPEC 2018-K63 -- 2004 CL1, 424482, 115052
`C42`	Xingming Obs. in China, 1 in MPEC 2018-K66 -- 2018 KW1

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

Impact Risk Monitoring on 22 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	NEODyS	1601	R E M O V E D						-
2018 KF1	JPL Sentry	1532	2101-2101	1	1.244e-06	-6.55	-6.55	0	JPL: Computed at 07:46 today Pacific time based on 122 observations spanning 1.8539 days (2018-May-19.30836 to 2018-May-21.16228). Diameter approximately 0.025 km. from weighted mean H=25.67.

2018 KB1	NEODyS	1532	R E M O V E D						-

2018 JD5	JPL Sentry	1532	R E M O V E D						JPL: Risk listing removed at 1434 UTC today

2018 GL2	JPL Sentry	1532	R E M O V E D						JPL: Risk listing removed at 1420 UTC today

2018 GE2	JPL Sentry	1639	2060-2117	43	7.511643e-05	-5.42	-5.99	0	JPL #2 for the day: Computed at 09:14 today Pacific time based on 104 observations spanning 36.027 days (2018-Apr-10.40973 to 2018-May-16.436634). Diameter approximately 0.013 km. from weighted mean H=27.02.

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 22 May '18

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

2358	Grabbed MPEC 2018-K67 - 2018 KX1 - see above
2018	Generated Traffic Report
1737	Grabbed MPEC 2018-K66 - 2018 KW1 - see above
1639	Noted that JPL Sentry has updated its 2018 GE2 risk assessment - see above
1601	Noted that NEODyS has removed 2018 KF1 as an impact risk - see above
1532	Noted that JPL Sentry has updated its 2018 GE2 risk assessment - see above Noted that JPL Sentry has removed 2018 GL2 as an impact risk - see above Noted that JPL Sentry has removed 2018 JD5 as an impact risk - see above Noted that NEODyS has removed 2018 KB1 as an impact risk - see above Noted that JPL Sentry has updated its 2018 KF1 risk assessment - see above Grabbed MPEC 2018-K63 - Daily Orbit Update - see above Grabbed MPEC 2018-K64 - 2018 KU1 - see above Grabbed MPEC 2018-K65 - 2018 KV1 - see above

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