2018-06-05 Tracking News

Contents on 5 June '18

Traffic Report -- three objects
IAU Minor Planet Center
- NEOCP Activity -- 26 listings
- New MPECs -- four MPECs
Observers -- 31 observers
Impact Risk Monitoring -- three objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 936 risk-listed objects, 50 have had news in the last 31 days. Updated at 1806 UTC on 5 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 5 June '18

Three objects reported inside ten LD

Two small celestial objects are reported less than ten (but more than six) lunar distances (LD) from Earth today. Risk-listed 2018 LB is outbound from 6.83 to 8.41 LD and 2018 EJ4 is inbound from 9.80 to 8.69 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
2.14 LD June 1	2018 LB	21 m	6.83 to 8.41 LD	May 26 - tomorrow	NHATS target, risk

5.56 LD June 10	2018 EJ4	186 m	8.69 from 9.80 LD	yesterday - June 16	radar/NHATS target - DOU

Approaching
8.96 LD June 11	2015 DP155	162 m	10.35 from 10.88 LD	tomorrow - June 15	NHATS target - DOU

This report was generated at 2136 UTC with follow-up in today's DOU MPEC for approaching 2015 DP155, inbound 2018 EJ4, and departed objects 2018 JM and 2014 JR25.

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 5 June '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, eleven were "one nighters." So far The Tracking News has counted a total of 32 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 5 June '18

Minor Planet Electronic Circulars

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

MPEC 2018-L09 time-stamped "10:45 UT" - 2018 LH - see below
MPEC 2018-L10 time-stamped "10:52 UT" - 2018 LJ - see below
MPEC 2018-L11 time-stamped "10:55 UT" - 2018 LG - see below
MPEC 2018-L12 time-stamped "12:02 UT" - Daily Orbit Update

<< DOU on 5 June '18 >> MPEC 2018-L12 - "12:02 UT" - Daily Orbit Update

Observations of recently (no longer) risk-listed objects
K18J05D 2018 JD5 (arc=21 days, H=18.9 ~562m) from Steward Obs. Mt. Lemmon Station (June 5.45-46p4)
Observations of close-passing objects
K18J00M 2018 JM (arc=19 days, H=23.8 ~59m) from UH/Tholen NEO Follow-Up 2.24m Telescope (May 24.43p1)
K18E04J 2018 EJ4 (arc=83 days, H=21.3 ~186m, NHATS target, radar support) from Northolt Branch Obs. (June 2.97-98p10), ATLAS Mauna Loa (June 4.43-46p3), KLENOT (June 4.89p9), and Oberfrauendorf Obs. (June 4.94-95p5)
K15DF5P 2015 DP155 (arc=2 opp, H=21.4 ~178m, NHATS target) from the Mt. Lemmon Survey (MLS) (June 4.34-35p4) and Taurus-1 Obs. (June 4.87-89p6)
K14J25R 2014 JR25 (Q=4.196 AU, arc=2 opp, H=23.3 ~74m) from Astronomical Research Obs. Westfield (June 4.23-26p3 at V=22.0-22.1)
Observation campaigns (NHATS targets, radar support)
K18L00C 2018 LC (arc=3 days, H=25.3 ~29m, NHATS) from LCO Sutherland C (June 2.73p3) and the Spacewatch 1.8m telescope (June 5.20-21p3)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small asteroids (H>22.0)
K18K01N 2018 KN1 (arc=16 days, H=23.3 ~74m) from ARO Westfield (June 4.16-18p3 at V=22.1-2)
K18K00P 2018 KP (arc=18 days, H=22.1 ~129m) from ARO Westfield (June 4.12-14p3 at V=21.9-22.1) and Pan-STARRS 1 (PS1) (June 4.33-36p3)
K18K00H 2018 KH (arc=19 days, H=24.6 ~41m) from Steward Mt. Lemmon Sta. (June 4.37p4)
K18J01Y 2018 JY1 (arc=26 days, H=23.5 ~68m) from Pan-STARRS 2 (PS2) (June 4.48-49p2)
K15J00P 2015 JP (arc=2 opp, H=22.8 ~93m) from ARO Westfield (June 4.18-23p3 at V=22.0-22.4)
J99L01K 1999 LK1 (arc=4 opp, H=22.1 ~129m) from the Catalina Sky Survey (CSS) (June 4.36-38p4)
Observations of other objects
K18K03F 2018 KF3 (arc=10 days, H=19.8 ~371m) from Steward Mt. Lemmon Sta. (June 5.43-45p3)
K18K01M 2018 KM1 (q=0.352 AU, arc=16 days, H=20.8 ~234m) from PS2 (June 4.34-37p3)
K18J05E 2018 JE5 (arc=20 days, H=20.6 ~257m) from CSS (June 4.43-45p4) and KLENOT (June 4.90-91p8)
K18J03C 2018 JC3 (arc=2 opp, H=20.0 ~339m) from KLENOT (June 4.91p4) and Guidestar Obs. (June 4.95-98p6)
K18J01E 2018 JE1 (arc=28 days, H=19.9 ~355m) from CSS (June 4.30-31p4) and KLENOT (June 4.87-88p10)
K18G04M 2018 GM4 (arc=54 days, H=21.5 ~170m) from ARO Westfield (June 4.16-20p3 at V=22.2-4)
K18G01J 2018 GJ1 (arc=41 days, H=20.8 ~234m) from Tholen 2.24m (May 16.23p2)
K18G00L 2018 GL (arc=60 days, H=20.4 ~282m) from ARO Westfield (June 4.12-15p3 at V=22.1-5)
K18C14K 2018 CK14 (arc=141 days, H=19.4 ~446m) from PS1 (June 4.56-59p4)
K17Y01Z 2017 YZ1 (arc=166 days, H=20.4 ~282m) from Spacewatch 1.8m (June 3.42-43p3 at R=21.6 & 4.43-45p2 at R=21.8-22.4)
K17W14H 2017 WH14 (arc=2 opp, H=18.1 ~812m) from PS1 (June 4.45-49p4)
K17U04R 2017 UR4 (arc=223 days, H=20.7 ~245m) from Spacewatch 1.8m (June 2.17-20p2 at R=22.2)
K17S14B 2017 SB14 (arc=260 days, H=21.0 ~214m) from ARO Westfield (June 4.30-33p3 at V=22.1-3)
K15X55P 2015 XP55 (i=42.2°, arc=2 opp, H=21.6 ~162m) from ARO Westfield (June 4.21-23p3 at V=22.0-22.1)
K14W07O 2014 WO7 (arc=2 opp, H=20.5 ~269m) from CSS (June 4.22-24p4)
K13Q10H 2013 QH10 (Q=4.789 AU, arc=2 opp, H=18.5 ~676m) from CSS (June 4.24-25p3)
K12K41Y 2012 KY41 (arc=4 opp, H=18.1 ~812m) from PS1 (June 4.34-38p2)
K12D61G 2012 DG61 (Q=5.650 AU, arc=3 opp, H=18.2 ~776m) from iTelescope Obs. Siding Spring (May 31.82p3 & June 3.82-83p3)
K04L00H 2004 LH (i=39.5°, arc=4 opp, H=18.8 ~589m) from ATLAS Haleakala (June 4.29-30p4)
p8463 518463 2005 JY80 from WISE (June 1.35p2, 1.48p1, 1.55p1, 1.68p1, 1.74p1, 1.87p1, 1.94p1, 2.07p1, 2.20p2, 2.27p1, 2.33p1, 2.40p1, 2.59p1, 2.66p1, 2.72p1, 2.79p1, 2.86p1, 2.92p1, 2.99p1, 3.05p2, 3.12p1, 3.18p1, 3.25p1, 3.31p1, 3.44p1, 3.51p1, 3.58p1, 3.77p1, 3.84p2, 3.90p1, 3.97p1, 4.10p1, 4.16p1, 4.23p1, 4.29p1 & 4.36p1)
p6976 516976 2012 HM1 from ATLAS Mauna Loa (June 4.46-50p4)
n5615 495615 2015 PQ291 from CSS (June 4.19-21p4)
k8910 468910 2014 KQ76 from PS1 (June 4.34-38p4)
k7309 467309 1996 AW1 from CSS (June 4.43-45p4)
j5550 455550 2004 JO2 from ATLAS Mauna Loa (June 4.55-57p5)
j0648 450648 2006 UC63 from ATLAS Mauna Loa (June 4.45-47p4)
f5029 415029 2011 UL21 from CSS (June 4.43-45p4)
e5212 405212 2003 QC10 from ATLAS Haleakala (June 4.28-31p4)
b4851 374851 2006 VV2 from ATLAS Haleakala (June 4.27-29p7)
Z0713 350713 2001 XP88 from PS1 (June 4.29-32p4)
M0839 220839 2004 VA from CSS (June 4.32-34p4) and Squirrel Valley Obs. (June 5.07-09p3)
I3548 183548 2003 HU42 from PS1 (June 4.29-33p4)
G4121 164121 2003 YT1 from ATLAS Haleakala (June 4.25-28p4)
G3691 163691 2003 BB43 from WISE (June 1.40p1 & 1.67p1)
G3243 163243 2002 FB3 from CSS (June 4.17-19p3) and ATLAS Mauna Loa (June 4.27-30p4)
G2168 162168 1999 GT6 from Guidestar Obs. (June 5.06-08p3)
F9533 159533 2001 HH31 from PS1 (June 4.29-32p4) and CSS (June 4.32-34p2)
F2931 152931 2000 EA107 from ATLAS Mauna Loa (June 4.29-32p9)
F2770 152770 1999 RR28 from PS1 (June 4.34-37p4)
D9345 139345 2001 KA67 from Northolt Branch Obs. (June 2.99p5) and ATLAS Mauna Loa (June 4.55-58p3)
D6839 136839 1997 WT22 from ATLAS Haleakala (June 4.41-44p4)
A0004 100004 1983 VA from PS1 (June 4.33-37p4)
85804 85804 1998 WQ5 from the Spacewatch 0.9m telescope (June 4.44-45p3)
85628 85628 1998 KV2 from CSS (June 4.32-34p3) and PS2 (June 4.32-36p3)
68350 68350 2001 MK3 from ATLAS Mauna Loa (June 4.53-56p4)
66391 66391 1999 KW4 from Fabra Obs. (June 1.87-88p8 & 2.91-92p8), Montelupo Obs. (June 2.92p3), Grorudalen Obs. (June 3.95-97p3), and ATLAS Mauna Loa (June 4.48-50p4)
66251 66251 1999 GJ2 from CSS (June 4.26-27p4)
54686 54686 2001 DU8 from PS1 (June 4.45-49p4)
54660 54660 2000 UJ1 from MLS (June 4.43-45p4)
54401 54401 2000 LM from CSS (June 4.43-45p3)
53789 53789 2000 ED104 from MLS (June 4.41-42p4)
38091 38091 1999 JT3 from CSS (June 4.20-21p4)
25916 25916 2001 CP44 from Montelupo Obs. (June 2.99-00p6) and CSS (June 4.41-42p4)
15745 15745 Yuliya (1991 PM5) from ATLAS Mauna Loa (June 4.51-53p3)
09856 9856 1991 EE from MLS (June 4.16-18p4)
08037 8037 1993 HO1 from CSS (June 4.20-21p4)
02059 2059 Baboquivari (1963 UA) from PS1 (June 4.34-37p4)
01685 1685 Toro (1948 OA) from ATLAS Haleakala (June 4.34-37p8)
01627 1627 Ivar (1929 SH) from ATLAS Mauna Loa (June 4.41-46p8) and Fushan Obs. (June 4.68-72p3)
01036 1036 Ganymed (1924 TD) from Montelupo Obs. (June 2.86p3)

MPEC 2018-L11 - "10:55 UT" - 2018 LG

K18L00G 2018 LG (small asteroid, H=22.6 ~102m) was picked up at 0419 UT on 2 June by MLS, observing it at June 2.18-20p4 and 2.26p3. This detection was confirmed by Visnjan Obs. (June 2.87p2 & 3.86-87p3), Steward Mt. Lemmon Sta. (June 3.15p4 & 4.20p4), PS1 (June 3.28-31p4), and Spacewatch 0.9m (June 4.19-20p2).

MPEC 2018-L10 - "10:52 UT" - 2018 LJ

K18L00J 2018 LJ (q=0.352 AU, Q=4.365 AU, H=21.2 ~195m) was picked up at 0753 UT on 3 June by CSS, observing it at June 3.33-35p4. This detection was confirmed by Steward Mt. Lemmon Sta. (June 3.39p4, 4.19p4 & 5.38p4), Spacewatch 0.9m (June 3.42-44p2), Guidestar Obs. (June 3.88-90p3 & 4.88-89p3), Visnjan Obs. (June 3.91-92p7), North Obs. (June 3.97-98p2 & 4.02p1), Golden Hill Obs. (June 3.99-01p5), Squirrel Valley Obs. (June 4.08-13p4), Sandlot Obs. (June 4.24-25p3), ARO Westfield (June 4.28-30p3), Wildberg Obs. (June 4.88-89p3), KLENOT (June 4.88p7), program code "(" (17) via Slooh.com Canary Islands Obs. (June 4.97p2), and M57 Obs. (June 4.97-99p3).

MPEC 2018-L09 - "10:45 UT" - 2018 LH

K18L00H 2018 LH (small asteroid, H=23.9 ~56m) was picked up at 0740 UT on 3 June by PS1, observing it at June 3.32-35p3. This detection was confirmed by Visnjan Obs. (June 3.88p2), Steward Mt. Lemmon Sta. (June 4.16-17p4), and Spacewatch 1.8m (June 4.31-32p3 & 5.26-27p3).

Observers on 5 June '18

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

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 9 in MPECs 2018-L10 & 2018-L12 -- 2018 LJ, 2018 KP, 2018 KN1, 2018 GM4, 2018 GL, 2017 SB14, 2015 XP55, 2015 JP, 2014 JR25
`T05`	ATLAS Haleakala in Hawaii, 6 in MPEC 2018-L12 -- 2004 LH, 405212, 374851, 164121, 136839, 1685
`T08`	ATLAS Mauna Loa in Hawaii, 11 in MPEC 2018-L12 -- 2018 EJ4, 68350, 66391, 516976, 455550, 450648, 163243, 15745, 152931, 139345, 1627
`703`	Catalina Sky Survey (CSS) in Arizona, 18 in MPECs 2018-L10 & 2018-L12 -- 2018 LJ, 2018 JE5, 2018 JE1, 2014 WO7, 2013 QH10, 1999 LK1, 85628, 66251, 54401, 495615, 467309, 415029, 38091, 25916, 220839, 163243, 159533, 8037
`006`	Fabra Obs. in Spain, 1 in MPEC 2018-L12 -- 66391
`G26`	Fushan Obs. in China, 1 in MPEC 2018-L12 -- 1627
`J77`	Golden Hill Obs. in England, 1 in MPEC 2018-L10 -- 2018 LJ
`238`	Grorudalen Obs. in Norway, 1 in MPEC 2018-L12 -- 66391
`A17`	Guidestar Obs. in Germany, 3 in MPECs 2018-L10 & 2018-L12 -- 2018 LJ, 2018 JC3, 162168
`Q62`	iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-L12 -- 2012 DG61
`246`	KLENOT in the Czech Republic, 5 in MPECs 2018-L10 & 2018-L12 -- 2018 LJ, 2018 JE5, 2018 JE1, 2018 JC3, 2018 EJ4
`K93`	LCO Sutherland C in South Africa, 1 in MPEC 2018-L12 -- 2018 LC
`K38`	M57 Obs. in Italy, 1 in MPEC 2018-L10 -- 2018 LJ
`108`	Montelupo Obs. in Italy, 3 in MPEC 2018-L12 -- 66391, 25916, 1036
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2018-L11 & 2018-L12 -- 2018 LG, 2015 DP155, 54660, 53789, 9856
`J69`	North Obs. in England, 1 in MPEC 2018-L10 -- 2018 LJ
`Z80`	Northolt Branch Obs. in England, 2 in MPEC 2018-L12 -- 2018 EJ4, 139345
`G34`	Oberfrauendorf Obs. in Germany, 1 in MPEC 2018-L12 -- 2018 EJ4
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 14 in MPECs 2018-L09, 2018-L11 & 2018-L12 -- 2018 LH, 2018 LG, 2018 KP, 2018 CK14, 2017 WH14, 2012 KY41, 54686, 468910, 350713, 183548, 159533, 152770, 100004, 2059
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 3 in MPEC 2018-L12 -- 2018 KM1, 2018 JY1, 85628
`H36`	Sandlot Obs. in Kansas, 1 in MPEC 2018-L10 -- 2018 LJ
`G40(`	program code "(" (17) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-L10 -- 2018 LJ
`691`	Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2018-L10, 2018-L11 & 2018-L12 -- 2018 LJ, 2018 LG, 85804
`291`	Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2018-L09 & 2018-L12 -- 2018 LH, 2018 LC, 2017 YZ1, 2017 UR4
`W34`	Squirrel Valley Obs. in North Carolina, 2 in MPECs 2018-L10 & 2018-L12 -- 2018 LJ, 220839
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 6 in MPECs 2018-L09, 2018-L10, 2018-L11 & 2018-L12 -- 2018 LJ, 2018 LH, 2018 LG, 2018 KH, 2018 KF3, 2018 JD5
`A98`	Taurus-1 Obs. in Belarus, 1 in MPEC 2018-L12 -- 2015 DP155
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2018-L12 -- 2018 JM, 2018 GJ1
`L01`	Visnjan Obs., 3 in MPECs 2018-L09, 2018-L10 & 2018-L11 -- 2018 LJ, 2018 LH, 2018 LG
`198`	Wildberg Obs. in Germany, 1 in MPEC 2018-L10 -- 2018 LJ
`C51`	WISE in Earth polar orbit, 2 in MPEC 2018-L12 -- 518463, 163691

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

Impact Risk Monitoring on 5 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 LB	NEODyS	1555	2075-2118	17	5.65e-06	-6.04	-6.5	-	NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2018-06-01.169 to 2018-06-02.148."

2018 LA	NEODyS	1555	2018	1	1.0e+00	2.11	2.11	0	NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2018-06-02.344 to 2018-06-02.502."

2014 LY21	JPL Sentry	1804	2019-2116	976	8.85019570999999e-05	-5.16	-5.66	0	JPL: Computed at 18:09 April 8th of 2017 Pacific time based on 11 observations spanning .04506 days (2014-Jun-02.41612 to 2014-Jun-02.46118). Diameter approximately 0.005 km. from weighted mean H=29.22.

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 5 June '18

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

2136	Generated Traffic Report
1804	Noted that JPL Sentry has updated its 2014 LY21 risk assessment - see above
1555	Noted that NEODyS has updated its 2018 LA risk assessment - see above Noted that NEODyS has posted 2018 LB as an impact risk - see above Grabbed MPEC 2018-L09 - 2018 LH - see above Grabbed MPEC 2018-L10 - 2018 LJ - see above Grabbed MPEC 2018-L11 - 2018 LG - see above Grabbed MPEC 2018-L12 - Daily Orbit Update - see above

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