2018-05-24 Tracking News

Contents on 24 May '18

Traffic Report -- four objects
IAU Minor Planet Center
- NEOCP Activity -- 22 listings
- New MPECs -- seven MPECs
Observers -- 23 observers
Impact Risk Monitoring -- three 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 1536 UTC on 24 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 24 May '18

Four objects reported inside ten LD

There are four asteroidal objects reported inside ten lunar distances (LD) of Earth today. Nearest is intruder 2018 KW1, which started the day inside the Earth-Moon system at 0.89 LD from Earth and finishes out at 2.41 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 yesterday	2018 KW1	4 m	0.89 to 2.41 LD	May 17 - 29	intruder today, NHATS target, exits Earth SOI

2.05 LD May 22	2018 KS	9 m	3.75 to 5.27 LD	May 16 - 27	NHATS target
2.24 LD May 21	2018 KF1	25 m	5.53 to 7.33 LD	May 16 - 26	risk

5.29 LD May 20	2018 JG1	43 m	9.06 to 10.62 LD	May 15 - 24	exits ten LD, risk

Approaching (sorted by 10-LD bubble entry date)
6.10 LD May 29	2018 KN2	27 m	10.37 from 11.89 LD	tomorrow - June 3	NEW - MPEC
9.50 LD May 29	68347 2001 KB67	371 m	15.58 from 18.06 LD	May 28 - 30	radar target
5.56 LD June 10	2018 EJ4	186 m	23.86 from 25.18 LD	June 4 - 16	radar/NHATS target - DOU
8.96 LD June 11	2015 DP155	162 m	18.95 from 19.77 LD	June 6 - 15	NHATS target - DOU

This report was updated at 2350 UTC with the discovery of approaching 2018 KN2 (MPEC). Your first local flying rocks traffic report was generated at 1811 UTC with follow-up in today's DOU MPEC for two approaching objects in the active traffic table here and for six more that have departed: 2018 KO1, 2018 KU, 2018 JM, 1999 FN19, intruder 2010 WC9, and risk-listed 2018 JN, plus distant 450894 2008 BT18.

<< Reading: The Southwest Research Institute has a news item telling about their new "'giant comet' cosmochemical model of Pluto formation" based on data from missions to 134340 Pluto and 67P/Churyumov-Gerasimenko. The paper can be found here. Speaking of 67P/Chury, the Max Planck Institute for Solar System Research has a piece describing how "the surface along the terminator almost instantaneously becomes active [when] the Sun rises over a part of the comet." NASA's Kepler mission is wrapping up with another round of planet hunting while also observing some small Solar-System bodies. Lawrence Livermore National Lab explains how studying the oldest known meteorite from Mars provides information on that planet's early giant impact history and why its southern and northern hemispheres are so different. And we also note this science preprint from Canada, which states that "Recent studies have shown that the proposal peer review processes employed by a variety of organizations to allocate astronomical telescope time produce outcomes that are systematically biased depending on whether [the] proposal's principal investigator (PI) is a man or a woman."

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 approached Earth within ten LD since A/CC began these traffic reports eleven years ago but is not currently coming 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 24 May '18

The MPC's NEO Confirmation Page has 22 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 22 objects listed. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 33 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 24 May '18

Minor Planet Electronic Circulars

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

MPEC 2018-K77 time-stamped "12:06 UT" - Daily Orbit Update - see below
MPEC 2018-K78 time-stamped "21:35 UT" - 2018 KK2 - see below
MPEC 2018-K79 time-stamped "21:39 UT" - 2018 KL2 - see below
MPEC 2018-K80 time-stamped "21:42 UT" - 2018 KM2 - see below
MPEC 2018-K81 time-stamped "21:45 UT" - 2018 KN2 - see below
MPEC 2018-K82 time-stamped "21:49 UT" - 2018 KO2 - see below
MPEC 2018-K83 time-stamped "21:58 UT" - 2018 KP2

MPEC 2018-K83 - "21:58 UT" - 2018 KP2

K18K02P 2018 KP2 (small asteroid, H=24.6 ~41m) was picked up at 0655 UT on 23 May by the Mt. Lemmon Survey (MLS), observing it at May 23.29-30p4. This detection was confirmed by Magdalena Ridge Obs. (MRO) (May 23.33-35p4), the Catalina Sky Survey (CSS) (May 23.34p4), Steward Obs. Mt. Lemmon Station (May 23.35p4 & 24.16p4), Farpoint Obs. (May 23.39p3), Astronomical Research Obs. Westfield (May 24.31p4), JAXA Space Tracking & Communications Center (JAXA STCC) (May 24.54p3), and Bernezzo Obs. (May 24.89-90p3).

MPEC 2018-K82 - "21:49 UT" - 2018 KO2

K18K02O 2018 KO2 (small asteroid, i=38.9°, H=23.5 ~68m) was picked up at 0613 UT on 22 May by MLS, observing it at May 22.26-27p4. This detection was confirmed by Steward Mt. Lemmon Sta. (May 22.30-31p4, 23.17p4 & 24.17p4), Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (May 23.11-12p3), and MRO (May 23.30-32p4).

MPEC 2018-K81 - "21:45 UT" - 2018 KN2

K18K02N 2018 KN2 (Earth MOID=5.7 LD, H=25.5 ~27m) was picked up at 0613 UT on 22 May by MLS, observing it at May 22.26-27p4. This detection was confirmed by Steward Mt. Lemmon Sta. (May 22.31p4, 23.23p4 & 24.16p3), Great Shefford Obs. (May 22.97-98p3), MRO (May 23.13-15p4), Farpoint Obs. (May 23.31p3), program code "(" (17) via Slooh.com Canary Islands Obs. (May 24.16p3), and ARO Westfield (May 24.33-34p4).

MPEC 2018-K80 - "21:42 UT" - 2018 KM2

K18K02M 2018 KM2 (H=20.4 ~282m) was picked up at 1153 UT on 21 May by Pan-STARRS 1 (PS1), observing it at May 21.50-53p3. This detection was confirmed by the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (May 22.29p4, 23.27p3 & 24.31p3), Marco Micheli on Mauna Kea (May 22.35p2), Holmes/CTIO (May 23.17-19p3), ARO Westfield (May 23.29-32p3), and Farpoint Obs. (May 23.34-37p3).

MPEC 2018-K79 - "21:39 UT" - 2018 KL2

K18K02L 2018 KL2 (H=21.7 ~155m) was picked up at 1057 UT on 21 May by PS1, observing it at May 21.46-51p6. This detection was confirmed by Schwarzschild Obs. (May 21.89-90p3 & 21.99p1), the Spacewatch 0.9m telescope (May 22.25-26p3 & 23.33-34p3), Steward Mt. Lemmon Sta. (May 22.25p4, 23.26-27p4 & 24.27p3), Holmes/CTIO (May 23.11-12p3), and Farpoint Obs. (May 23.33-34p3).

MPEC 2018-K78 - "21:35 UT" - 2018 KK2

K18K02K 2018 KK2 (Q=4.532 AU, H=18.3 ~741m) was picked up at 0446 UT on 17 May by WISE, observing it at May 17.20p1, 17.46p1, 17.53p1, 17.72p1, and 18.05p1. This detection was confirmed by UH/Tholen NEO Follow-Up 2.24m Telescope (May 22.24-25p5 & 24.27-28p5), CSS-Kuiper (May 23.15-16p3), and Spacewatch 0.9m (May 24.15-18p3).

<< DOU on 24 May '18 >> MPEC 2018-K77 - "12:06 UT" - Daily Orbit Update

Observations of risk-listed objects
K18J02C 2018 JC2 (small asteroid, Q=4.654 AU, arc=15 days, H=22.8 ~93m) from ARO Westfield (May 23.10-13p3 at V=22.2-4) and the Spacewatch 1.8m telescope (May 24.20-23p3)
K18J00N 2018 JN (small asteroid, arc=19 days, H=25.0 ~34m, close passer) from Tholen 2.24m (May 23.52p2) and Spacewatch 1.8m (May 24.33-34p2)
K18H02J 2018 HJ2 (small asteroid, Q=4.016 AU, arc=30 days, H=24.5 ~43m) from Tholen 2.24m (May 23.45-46p2 at G=23.81-24.09)
Observations of recently (no longer) risk-listed objects
K18K01B 2018 KB1 (arc=7 days, H=20.6 ~257m) from Steward Mt. Lemmon Sta. (May 24.43-44p4)
K18J05D 2018 JD5 (arc=9 days, H=18.9 ~562m) from Steward Mt. Lemmon Sta. (May 24.45p4)
K10W09C 2010 WC9 (small asteroid, arc=3 opp, H=23.6 ~65m, close passer) from Slooh.com CIO/code "(" (17) (May 15.07p4)
Observations of close-passing objects
K18K01O 2018 KO1 (arc=5 days, H=25.0 ~34m) from Steward Mt. Lemmon Sta. (May 24.26p4)
K18K00U 2018 KU (arc=6 days, H=26.4 ~18m) from Steward Mt. Lemmon Sta. (May 24.37-38p2)
K18J00M 2018 JM (arc=19 days, H=23.8 ~59m) from Steward Mt. Lemmon Sta. (May 24.31-32p4)
K18E04J 2018 EJ4 (arc=72 days, H=21.3 ~186m, NHATS target, radar support) from Steward Mt. Lemmon Sta. (May 24.38-39p4)
K15DF5P 2015 DP155 (arc=2 opp, H=21.4 ~178m, NHATS target) from LCO Haleakala Clamshell#3 (May 22.36-48p10)
J99F19N 1999 FN19 (arc=2 opp, H=22.5 ~107m, NHATS target, radar support) from MLS (May 23.38-40p4)
j0894 450894 2008 BT18 from CSS (May 23.45-46p3)
Observation campaigns (NHATS targets, radar support)
K18K01D 2018 KD1 (arc=6 days, H=24.5 ~43m, NHATS) from Steward Mt. Lemmon Sta. (May 24.21p2)
K18K01C 2018 KC1 (arc=6 days, H=25.6 ~26m, NHATS) from Steward Mt. Lemmon Sta. (May 24.19-20p4)
K18K00R 2018 KR (arc=7 days, H=26.5 ~17m, NHATS) from Steward Mt. Lemmon Sta. (May 24.32-33p4)
K18J01O 2018 JO1 (arc=16 days, H=25.0 ~34m, NHATS) from CSS-Kuiper (May 24.40p4)
K18G01L 2018 GL1 (arc=45 days, H=23.6 ~65m, NHATS) from Tholen 2.24m (May 23.60-61p2), Steward Mt. Lemmon Sta. (May 24.39-40p3 & 24.45p4), and Spacewatch 0.9m (May 24.40p3)
K17M08T 2017 MT8 (arc=2 opp, H=23.2 ~78m, NHATS) from CSS-Kuiper (May 24.44-45p4)
K17K34U 2017 KU34 (arc=2 opp, H=23.6 ~65m, NHATS) from Spacewatch 0.9m (May 24.19-22p3) and Steward Mt. Lemmon Sta. (May 24.22-23p4)
K10M01S 2010 MS1 (arc=2 opp, H=21.8 ~148m, NHATS) from Spacewatch 0.9m (May 24.24-25p3)
K10C19F 2010 CF19 (arc=4 opp, H=21.7 ~155m, NHATS) from ARO Westfield (May 23.20-24p3 at V=22.2-4)
05604 5604 1992 FE (radar) from ATLAS Haleakala (May 23.32-34p4)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K18K01L 2018 KL1 (arc=5 days, H=22.3 ~117m) from Steward Mt. Lemmon Sta. (May 24.22p4)
K18K01K 2018 KK1 (q=0.251 AU, arc=5 days, H=23.5 ~68m) from Steward Mt. Lemmon Sta. (May 24.16p3)
K18K01E 2018 KE1 (arc=6 days, H=25.1 ~32m) from Steward Mt. Lemmon Sta. (May 24.19p2)
K18K00O 2018 KO (arc=7 days, H=26.1 ~20m) from Steward Mt. Lemmon Sta. (May 24.28p3)
K18K00K 2018 KK (arc=8 days, H=25.2 ~31m) from Steward Mt. Lemmon Sta. (May 24.31p2)
K18K00H 2018 KH (arc=8 days, H=24.6 ~41m) from Steward Mt. Lemmon Sta. (May 24.33p4)
K18J03J 2018 JJ3 (arc=9 days, H=24.0 ~54m) from Steward Mt. Lemmon Sta. (May 24.17-18p4)
K18J02Y 2018 JY2 (arc=11 days, H=24.8 ~37m) from Holmes/CTIO (May 23.15-16p3)
K18J02V 2018 JV2 (arc=12 days, H=23.7 ~62m) from Steward Mt. Lemmon Sta. (May 24.37p4)
K18J02J 2018 JJ2 (Q=4.356 AU, arc=14 days, H=24.1 ~51m) from Steward Mt. Lemmon Sta. (May 24.37p3)
K18J02G 2018 JG2 (arc=14 days, H=23.9 ~56m) from Steward Mt. Lemmon Sta. (May 24.25p4)
K18J02F 2018 JF2 (arc=15 days, H=24.1 ~51m) from Steward Mt. Lemmon Sta. (May 24.19p4)
K18J01Y 2018 JY1 (arc=15 days, H=23.5 ~68m) from CSS (May 23.24-26p4) and Steward Mt. Lemmon Sta. (May 24.35p3)
K18J01K 2018 JK1 (arc=15 days, H=24.4 ~45m) from ARO Westfield (May 23.15-18p3 at V=22.2-4)
K18H02H 2018 HH2 (arc=30 days, H=23.1 ~81m) from Holmes/CTIO (May 23.12-13p3)
K18D02B 2018 DB2 (arc=88 days, H=22.1 ~129m) from Steward Mt. Lemmon Sta. (May 24.46p4)
K16L49J 2016 LJ49 (arc=3 opp, H=22.2 ~123m) from CSS-Kuiper (May 24.15-16p4)
K16J00N 2016 JN (arc=2 opp, H=23.3 ~74m) from CSS-Kuiper (May 24.39p3)
K16GD5H 2016 GH135 (arc=2 opp, H=22.2 ~123m) from CSS-Kuiper (May 24.41-42p4 at G=21.3-22.1)
K18K01H 2018 KH1 (arc=6 days, H=22.0 ~135m) from Steward Mt. Lemmon Sta. (May 24.26-27p3)
K18K00L 2018 KL (arc=8 days, H=21.9 ~141m) from Steward Mt. Lemmon Sta. (May 24.28-30p4)
Observations of other objects
K18K01U 2018 KU1 (arc=5 days, H=20.8 ~234m) from Steward Mt. Lemmon Sta. (May 24.16-17p3)
K18K01M 2018 KM1 (q=0.353 AU, arc=5 days, H=20.8 ~234m) from MLS (May 23.25-27p4), CSS (May 23.26-28p4), ATLAS Mauna Loa (May 23.45-48p4), and Steward Mt. Lemmon Sta. (May 24.18p4)
K18K01G 2018 KG1 (Q=4.283 AU, arc=6 days, H=19.1 ~513m) from Steward Mt. Lemmon Sta. (May 24.15p3)
K18K00V 2018 KV (Q=4.390 AU, arc=41 days, H=17.1 ~1.29 km) from MLS (May 23.27-29p4) and Steward Mt. Lemmon Sta. (May 24.40-41p4)
K18K00T 2018 KT (arc=6 days, H=20.7 ~245m) from Tholen 2.24m (May 23.56p2)
K18J05E 2018 JE5 (arc=9 days, H=20.7 ~245m) from Steward Mt. Lemmon Sta. (May 24.40-42p4)
K18J03K 2018 JK3 (i=43.0°, arc=9 days, H=21.7 ~155m) from MLS (May 23.29-31p3), CSS (May 23.30-34p8), ATLAS Mauna Loa (May 23.46-51p4), and Steward Mt. Lemmon Sta. (May 24.40p4)
K18J01S 2018 JS1 (Q=4.379 AU, arc=41 days, H=20.3 ~295m) from MLS (May 23.23-24p4) and Steward Mt. Lemmon Sta. (May 24.36-37p2)
K18J01Q 2018 JQ1 (arc=16 days, H=21.4 ~178m) from Steward Mt. Lemmon Sta. (May 24.33-35p4)
K18J01P 2018 JP1 (arc=16 days, H=20.8 ~234m) from CSS-Kuiper (May 24.40-41p4)
K18J01E 2018 JE1 (arc=17 days, H=19.8 ~371m) from CSS (May 23.27-28p4), ATLAS Mauna Loa (May 23.43-47p4), and Steward Mt. Lemmon Sta. (May 24.35-36p4)
K18J00L 2018 JL (Q=4.922 AU, arc=19 days, H=20.8 ~234m) from Spacewatch 0.9m (May 23.18-19p3) and Steward Mt. Lemmon Sta. (May 24.20p3)
K18J00F 2018 JF (arc=20 days, H=21.4 ~178m) from Steward Mt. Lemmon Sta. (May 24.20-21p3 at G=20.9-22.2)
K18J00A 2018 JA (arc=21 days, H=20.4 ~282m) from Steward Mt. Lemmon Sta. (May 24.18p4)
K18H03S 2018 HS3 (arc=28 days, H=20.6 ~257m) from Steward Mt. Lemmon Sta. (May 24.24p2)
K18H03R 2018 HR3 (Q=4.133 AU, arc=22 days, H=18.9 ~562m) from Martin Altmann via Cerro Paranal (April 23.11-16p20)
K18G04J 2018 GJ4 (arc=40 days, H=21.7 ~155m) from Holmes/CTIO (May 23.20-21p3)
K18F05O 2018 FO5 (arc=64 days, H=20.5 ~269m) from CSS-Kuiper (May 24.21-22p3)
K18E04Q 2018 EQ4 (arc=72 days, H=19.6 ~407m) from Steward Mt. Lemmon Sta. (May 24.36-37p4)
K18B02Y 2018 BY2 (arc=141 days, H=20.5 ~269m) from Steward Mt. Lemmon Sta. (May 24.33-36p4)
K18A18O 2018 AO18 (arc=146 days, H=21.2 ~195m) from CSS-Kuiper (May 24.34-35p2)
K18A00Z 2018 AZ (arc=146 days, H=21.2 ~195m) from Steward Mt. Lemmon Sta. (May 24.29-30p3 at G=21.7-22.2)
K17W14H 2017 WH14 (arc=2 opp, H=18.1 ~812m) from Steward Mt. Lemmon Sta. (May 24.41-42p4)
K17S14B 2017 SB14 (arc=248 days, H=21.0 ~214m) from ARO Westfield (May 23.29-31p2 at V=22.0-22.1)
K17Q18E 2017 QE18 (arc=2 opp, H=19.5 ~426m) from CSS-Kuiper (May 24.23-25p2)
K17G05T 2017 GT5 (arc=2 opp, H=21.3 ~186m) from Steward Mt. Lemmon Sta. (May 24.41-42p4)
K17D36O 2017 DO36 (i=57.3°, arc=3 opp, H=17.7 ~977m) from MLS (May 23.43-44p4)
K16O02Y 2016 OY2 (arc=2 opp, H=19.2 ~490m) from CSS-Kuiper (May 24.25-27p3)
K16J00P 2016 JP (arc=3 opp, H=21.1 ~204m) from MLS (May 23.20-22p4), CSS (May 23.22-24p4), and Steward Mt. Lemmon Sta. (May 24.25p4)
K16CQ4X 2016 CX264 (arc=2 opp, H=19.5 ~426m) from Steward Mt. Lemmon Sta. (May 24.23-24p4)
K15U67C 2015 UC67 (arc=2 opp, H=19.6 ~407m) from Spacewatch 1.8m (May 24.44-45p3)
K13L25K 2013 LK25 (arc=3 opp, H=21.6 ~162m) from PS1 (May 23.33-36p3)
K12U27V 2012 UV27 (arc=3 opp, H=19.5 ~426m) from ATLAS Haleakala (May 23.56-58p6)
K12L11F 2012 LF11 (arc=3 opp, H=20.8 ~234m) from Spacewatch 0.9m (May 24.43p2)
K09SA4K 2009 SK104 (Q=4.457 AU, arc=2 opp, H=19.3 ~467m) from ATLAS Haleakala (May 23.29-32p4)
K09O09O 2009 OO9 (q=0.305 AU, arc=7 opp, H=18.8 ~589m) from Spacewatch 0.9m (May 24.37-38p2)
K08K05Z 2008 KZ5 (arc=3 opp, H=20.0 ~339m) from PS1 (May 23.49-53p4)
K02O04N 2002 ON4 (arc=3 opp, H=19.0 ~537m) from CSS (May 23.29-30p4)
p4652 514652 2005 SC71 from CSS (May 23.24-26p4)
o4711 504711 2009 SP171 from MLS (May 23.34-35p4)
k8730 468730 2010 MN51 from MLS (May 23.40-42p4)
j0648 450648 2006 UC63 from MLS (May 23.25-27p4), CSS (May 23.26-28p4), and ATLAS Mauna Loa (May 23.44-48p4)
i4193 444193 2005 SE71 from ATLAS Haleakala (May 23.29-31p4)
h9313 439313 2012 VE82 from MLS (May 23.18-20p4) and CSS (May 23.20-22p4)
h6775 436775 2012 LC1 from ATLAS Haleakala (May 23.42-44p4)
X7084 337084 1998 SE36 from MLS (May 23.18-19p4)
O3566 243566 1995 SA from CSS (May 23.43-44p3)
M0839 220839 2004 VA from ATLAS Mauna Loa (May 23.34-38p4)
G2854 162854 2001 DE47 from MLS (May 23.32-33p4)
F5341 155341 2006 SA218 from MLS (May 23.20-22p4)
F4590 154590 2003 MA3 from Tholen 2.24m (May 22.35p2 at G=22.36-47)
F4278 154278 2002 TB9 from MLS (May 23.38-40p4)
F4268 154268 2002 RM129 from CSS (May 23.35-36p3) and PS1 (May 23.54-58p4)
F2931 152931 2000 EA107 from CSS (May 23.17-19p4) and ATLAS Mauna Loa (May 23.30-32p5)
D9289 139289 2001 KR1 from MLS (May 23.36-38p4), Spacewatch 0.9m (May 23.45-46p3), and ATLAS Mauna Loa (May 23.59-60p2)
D8847 138847 2000 VE62 from CSS (May 23.22-24p4)
86666 86666 2000 FL10 from MLS (May 23.29-31p4)
68348 68348 2001 LO7 from ATLAS Haleakala (May 23.30-32p4)
65706 65706 1992 NA from ATLAS Haleakala (May 23.60-61p4)
37655 37655 Illapa (1994 PM) from CSS (May 23.22-24p4)
24761 24761 Ahau (1993 BW2) from MLS (May 23.27-29p4) and CSS (May 23.28-30p4)
16834 16834 1997 WU22 from CSS (May 23.45-46p4)
15745 15745 Yuliya (1991 PM5) from ATLAS Mauna Loa (May 23.50-54p4)
06456 6456 Golombek (1992 OM) from ATLAS Haleakala (May 23.55-59p8)
02135 2135 Aristaeus (1977 HA) from ARO Westfield (May 23.33-36p3 at V=22.2-3)
01865 1865 Cerberus (1971 UA) from CSS (May 23.45-46p4)
01685 1685 Toro (1948 OA) from ATLAS Haleakala (May 23.36-39p4)
01627 1627 Ivar (1929 SH) from CSS (May 23.24-26p4) and ATLAS Mauna Loa (May 23.42-46p4)

Observers on 24 May '18

A total of 23 observers appear in today's MPECs.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 8 in MPECs 2018-K77, 2018-K80, 2018-K81 & 2018-K83 -- 2018 KP2, 2018 KN2, 2018 KM2, 2018 JK1, 2018 JC2, 2017 SB14, 2010 CF19, 2135
`T05`	ATLAS Haleakala in Hawaii, 9 in MPEC 2018-K77 -- 2012 UV27, 2009 SK104, 68348, 65706, 444193, 436775, 6456, 5604, 1685
`T08`	ATLAS Mauna Loa in Hawaii, 9 in MPEC 2018-K77 -- 2018 KM1, 2018 JK3, 2018 JE1, 450648, 220839, 15745, 152931, 139289, 1627
`C77`	Bernezzo Obs. in Italy, 1 in MPEC 2018-K83 -- 2018 KP2
`703`	Catalina Sky Survey (CSS) in Arizona, 20 in MPECs 2018-K77 & 2018-K83 -- 2018 KP2, 2018 KM1, 2018 JY1, 2018 JK3, 2018 JE1, 2016 JP, 2002 ON4, 514652, 450894, 450648, 439313, 37655, 24761, 243566, 16834, 154268, 152931, 138847, 1865, 1627
`V06`	Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 12 in MPECs 2018-K77, 2018-K78 & 2018-K80 -- 2018 KM2, 2018 KK2, 2018 JP1, 2018 JO1, 2018 FO5, 2018 AO18, 2017 QE18, 2017 MT8, 2016 OY2, 2016 LJ49, 2016 JN, 2016 GH135
`309'`	Martin Altmann in Germany via Cerro Paranal in Chile, 1 in MPEC 2018-K77 -- 2018 HR3
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPECs 2018-K77, 2018-K79, 2018-K80 & 2018-K82 -- 2018 KO2, 2018 KM2, 2018 KL2, 2018 JY2, 2018 HH2, 2018 GJ4
`734`	Farpoint Obs. in Kansas, 4 in MPECs 2018-K79, 2018-K80, 2018-K81 & 2018-K83 -- 2018 KP2, 2018 KN2, 2018 KM2, 2018 KL2
`J95`	Great Shefford Obs. in England, 1 in MPEC 2018-K81 -- 2018 KN2
`P93`	JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-K83 -- 2018 KP2
`T03`	LCO Haleakala Clamshell#3 in Hawaii, 1 in MPEC 2018-K77 -- 2015 DP155
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2018-K81, 2018-K82 & 2018-K83 -- 2018 KP2, 2018 KO2, 2018 KN2
`568_`	Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2018-K80 -- 2018 KM2
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 21 in MPECs 2018-K77, 2018-K81, 2018-K82 & 2018-K83 -- 2018 KV, 2018 KP2, 2018 KO2, 2018 KN2, 2018 KM1, 2018 JS1, 2018 JK3, 2017 DO36, 2016 JP, 1999 FN19, 86666, 504711, 468730, 450648, 439313, 337084, 24761, 162854, 155341, 154278, 139289
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2018-K77, 2018-K79 & 2018-K80 -- 2018 KM2, 2018 KL2, 2013 LK25, 2008 KZ5, 154268
`033`	Schwarzschild Obs. in Germany, 1 in MPEC 2018-K79 -- 2018 KL2
`G40(`	program code "(" (17) via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPECs 2018-K77 & 2018-K81 -- 2018 KN2, 2010 WC9
`691`	Spacewatch 0.9m telescope in Arizona, 9 in MPECs 2018-K77, 2018-K78 & 2018-K79 -- 2018 KL2, 2018 KK2, 2018 JL, 2018 GL1, 2017 KU34, 2012 LF11, 2010 MS1, 2009 OO9, 139289
`291`	Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2018-K77 -- 2018 JN, 2018 JC2, 2015 UC67
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 50 in MPECs 2018-K77, 2018-K79, 2018-K81, 2018-K82 & 2018-K83 -- 2018 KV, 2018 KU1, 2018 KU, 2018 KR, 2018 KP2, 2018 KO2, 2018 KO1, 2018 KO, 2018 KN2, 2018 KM1, 2018 KL2, 2018 KL1, 2018 KL, 2018 KK1, 2018 KK, 2018 KH1, 2018 KH, 2018 KG1, 2018 KE1, 2018 KD1, 2018 KC1, 2018 KB1, 2018 JY1, 2018 JV2, 2018 JS1, 2018 JQ1, 2018 JM, 2018 JL, 2018 JK3, 2018 JJ3, 2018 JJ2, 2018 JG2, 2018 JF2, 2018 JF, 2018 JE5, 2018 JE1, 2018 JD5, 2018 JA, 2018 HS3, 2018 GL1, 2018 EQ4, 2018 EJ4, 2018 DB2, 2018 BY2, 2018 AZ, 2017 WH14, 2017 KU34, 2017 GT5, 2016 JP, 2016 CX264
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 6 in MPECs 2018-K77 & 2018-K78 -- 2018 KT, 2018 KK2, 2018 JN, 2018 HJ2, 2018 GL1, 154590
`C51`	WISE in Earth polar orbit, 1 in MPEC 2018-K78 -- 2018 KK2

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

Impact Risk Monitoring on 24 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 JC2	JPL Sentry	1534	2050-2050	1	1.751e-10	-8.57	-8.57	0	JPL: Computed at 07:26 today Pacific time based on 80 observations spanning 14.911 days (2018-May-09.32052 to 2018-May-24.23141). Diameter approximately 0.094 km. from weighted mean H=22.79.

2018 JN	JPL Sentry	1534	2100-2112	2	2.236e-06	-6.05	-6.32	0	JPL: Computed at 07:24 today Pacific time based on 135 observations spanning 18.921 days (2018-May-05.42349 to 2018-May-24.34485). Diameter approximately 0.033 km. from weighted mean H=25.06.
2018 JN	NEODyS	1534	2088-2112	4	1.3e-06	-6.27	-6.29	0	NEODyS: "Based on 131 optical observations (of which 1 are rejected as outliers) from 2018-05-05.424 to 2018-05-23.358."

2018 HJ2	JPL Sentry	1534	2085-2085	1	2.519e-08	-7.61	-7.61	0	JPL: Computed at 07:19 today Pacific time based on 103 observations spanning 30.049 days (2018-Apr-23.41101 to 2018-May-23.46042). Diameter approximately 0.042 km. from weighted mean H=24.55.
2018 HJ2	NEODyS	1534	2085-2114	2	3.24e-06	-5.55	-5.61	0	NEODyS: "Based on 101 optical observations (of which 0 are rejected as outliers) from 2018-04-23.412 to 2018-05-22.455."

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 24 May '18

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

2350	Updated Traffic Report
2233	Grabbed MPEC 2018-K83 - 2018 KP2 - see above
2158	Grabbed MPEC 2018-K78 - 2018 KK2 - see above Grabbed MPEC 2018-K79 - 2018 KL2 - see above Grabbed MPEC 2018-K80 - 2018 KM2 - see above Grabbed MPEC 2018-K81 - 2018 KN2 - see above Grabbed MPEC 2018-K82 - 2018 KO2 - see above
1534	Noted that JPL Sentry has updated its 2018 HJ2 risk assessment - see above Noted that NEODyS has updated its 2018 HJ2 risk assessment - see above Noted that JPL Sentry has updated its 2018 JC2 risk assessment - see above Noted that JPL Sentry has updated its 2018 JN risk assessment - see above Noted that NEODyS has updated its 2018 JN risk assessment - see above Grabbed MPEC 2018-K77 - Daily Orbit Update - see above

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