2018-06-15 Tracking News

Contents on 15 June '18

Traffic Report -- six objects
IAU Minor Planet Center
- NEOCP Activity -- 79 listings
- New MPECs -- two MPECs
Observers -- 22 observers
Impact Risk Monitoring -- ten objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 942 risk-listed objects, 31 have had news in the last 31 days. Updated at 1505 UTC on 15 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 15 June '18

Six objects reported inside ten LD

Six minor planets are reported inside ten lunar distances (LD) of Earth today. Nearest by far is risk-listed intruder 2018 LV3, which started the day inside the Earth-Moon system at 0.90 LD from Earth, passed us at 0.86 LD at 0230 UTC and missed the Moon by 1.51 LD at 0647 UTC, and will close out the day 2.39 LD from our planet.

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
0.86 LD today	2018 LV3	17 m	0.86 LD	June 11 - 19	intruder today, Earth closest at 0230 UTC, Moon closest 1.51 LD at 0647 UTC, risk

1.56 LD yesterday	2018 LD1	18 m	1.77 to 3.63 LD	June 10 - 18	exits Earth SOI, risk

3.64 LD June 11	2018 LW3	21 m	8.00 to 9.93 LD	June 7 - 16

5.56 LD June 10	2018 EJ4	186 m	8.05 to 9.10 LD	June 4 - 16	radar/NHATS target
7.62 LD today	2018 LK	155 m	7.62 LD	June 13 - 18	Earth closest at 2026 UTC - DOU
8.96 LD June 11	2015 DP155	162 m	9.72 to 10.15 LD	June 6 - 15	NHATS target, exits ten LD - DOU

Approaching
6.0 LD June 29*	2018 LR3	18 m	12.9 from 13.7 LD	June 20 - July 8	Earth passage uncertainty +/- 6 mins.*, NHATS target, risk

This report was generated at 1820 UTC with today's DOU MPEC belatedly announcing the discovery of 2018 KC4, which flew by us at about 2.4 LD on May 24th. The DOU also reports the recovery of distant 207398 2006 AS2 and follow-up for two objects active in the above table as well as departed risk-listed objects 2018 LE1 and 2018 LM.

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 approached Earth within ten LD since A/CC began these traffic reports eleven years ago but are not presently 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 15 June '18

The MPC's NEO Confirmation Page has 79 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 79 objects listed. Of these, 29 were "one nighters." So far The Tracking News has counted a total of 80 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 15 June '18

Minor Planet Electronic Circulars

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

MPEC 2018-L77 time-stamped "00:07 UT" - 2005 PP - see below
MPEC 2018-L78 time-stamped "12:04 UT" - Daily Orbit Update

<< DOU on 15 June '18 >> MPEC 2018-L78 - "12:04 UT" - Daily Orbit Update

Observations of risk-listed objects
K18L01E 2018 LE1 (small asteroid, arc=8 days, H=27.5 ~11m, close passer, NHATS target) from UH/Tholen NEO Follow-Up 2.24m Telescope (June 13.48p2 at G=22.32-38)
K18L01B 2018 LB1 (Q=4.582 AU, arc=27 days, H=20.0 ~339m) from Tholen 2.24m (June 14.36p2) and ESA Optical Ground Station (ESA OGS) (June 14.94-95p2)
K18L00M 2018 LM (small asteroid, arc=11 days, H=25.2 ~31m, close passer, NHATS target) from Mt. John Obs. (June 14.41-42p3), ESA OGS (June 14.91p1), and Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (June 15.03-04p3)
Observations of close-passing objects
K18L00K 2018 LK (arc=59 days, H=21.7 ~155m) from the Catalina Sky Survey (CSS) (June 14.39-40p4), the Mt. Lemmon Survey (MLS) (June 14.39-40p4), and Great Shefford Obs. (June 15.07p4)
K18K04C 2018 KC4 (arc=1 day, H=26.2 ~19m) from ATLAS Mauna Loa (May 21.42-45p4 first detection) and ATLAS Haleakala (May 22.43-47p5)
K15DF5P 2015 DP155 (arc=2 opp, H=21.5 ~170m, NHATS target) from North Obs. (June 14.97-99p4)
K7398 207398 2006 AS2 from MLS (June 14.42-46p4)
Observation campaigns (NHATS targets, radar support)
K18L01C 2018 LC1 (arc=9 days, H=24.8 ~37m, NHATS) from Pan-STARRS 1 (PS1) (June 14.44-47p3)
K18L00C 2018 LC (arc=13 days, H=25.5 ~27m, NHATS) from the Spacewatch 1.8m telescope (June 15.16-17p2)
K18J01O 2018 JO1 (arc=37 days, H=25.0 ~34m, NHATS) from Astronomical Research Obs. Westfield (June 14.12-16p3 at V=23.2-6)
K17X62C 2017 XC62 (arc=176 days, H=22.4 ~112m, NHATS) from Mt. John Obs. (June 7.43-44p3)
K04RB1O 2004 RO111 (arc=2 opp, H=23.2 ~78m, NHATS) from PS1 (June 14.50-53p3)
-- NHATS target table
Observations of small asteroids (H>22.0)
K18L03T 2018 LT3 (arc=4 days, H=24.8 ~37m) from PS1 (June 14.40-43p3)
K18L00H 2018 LH (arc=12 days, H=24.1 ~51m) from Holmes/CTIO (June 14.99p3)
K18K03C 2018 KC3 (arc=21 days, H=23.1 ~81m) from CSS (June 14.19-20p3)
K18K00H 2018 KH (arc=29 days, H=24.5 ~43m) from ARO Westfield (June 14.25-29p3 at V=22.0-22.1)
K18J02V 2018 JV2 (arc=33 days, H=23.6 ~65m) from PS1 (June 14.40-42p3)
Observations of other objects
K18J05E 2018 JE5 (arc=30 days, H=20.6 ~257m) from PS1 (June 14.45-52p7)
K18J03C 2018 JC3 (arc=2 opp, H=20.0 ~339m) from MLS (June 14.32-34p4)
K18J03B 2018 JB3 (i=40.4°, Q=0.882 AU, arc=36 days, H=17.6 ~1.02 km) from PS1 (June 14.59-60p3)
K18J02Z 2018 JZ2 (arc=33 days, H=21.7 ~155m) from ARO Westfield (June 14.17-21p3 at V=23.0-4)
K18G05A 2018 GA5 (Q=4.921 AU, arc=63 days, H=18.3 ~741m) from M57 Obs. (June 14.96-01p3)
K18F03P 2018 FP3 (arc=87 days, H=21.2 ~195m) from Holmes/CTIO (June 15.01-02p3 at G=22.2)
K16J34N 2016 JN34 (i=45.2°, arc=2 opp, H=20.4 ~282m) from Mt. John Obs. (June 14.43-44p3)
K15Y10P 2015 YP10 (arc=3 opp, H=20.2 ~309m) from ARO Westfield (June 14.20-24p3 at V=22.2-4)
K12M11M 2012 MM11 (arc=3 opp, H=20.3 ~295m) from PS1 (June 14.34-36p3)
K11S05R 2011 SR5 (q=0.347 AU, arc=5 opp, H=20.7 ~245m) from ARO Westfield (June 14.20-24p3 at V=22.1-5)
K08M01R 2008 MR1 (arc=6 opp, H=18.3 ~741m) from PS1 (June 14.29-33p4)
K05U05Y 2005 UY5 (arc=4 opp, H=18.7 ~616m) from ATLAS Haleakala (June 14.50-53p4)
K05R00B 2005 RB (arc=3 opp, H=20.2 ~309m) from ARO Westfield (June 14.34-37p2 at V=22.2-5)
p8735 518735 2009 JL1 from ATLAS Haleakala (June 14.44-48p4)
p8640 518640 2008 KZ5 from CSS (June 14.30-32p3)
p8507 518507 2006 EE1 from ARO Westfield (June 14.16-19p3 at V=22.1-2)
o8796 508796 2000 KN44 from Purple Mtn. Obs. Xuyi Station (June 14.61-63p2)
o8767 508767 1993 BD2 from MLS (June 14.30-31p3)
o5178 505178 2012 TV78 from PS1 (June 14.40-43p3)
k8909 468909 2014 KZ44 from MLS (June 14.20-22p4) and PS1 (June 15.33-37p4)
k7309 467309 1996 AW1 from SONEAR (June 14.06-07p3) and Squirrel Valley Obs. (June 15.07-09p3)
k3387 463387 2013 CT82 from PS1 (June 14.59-60p4)
e5212 405212 2003 QC10 from ATLAS Mauna Loa (June 14.31-34p8)
c5843 385843 2006 JY25 from ATLAS Haleakala (June 14.43-50p7)
b4851 374851 2006 VV2 from ATLAS Mauna Loa (June 14.26-29p4)
Y1050 341050 2007 HZ from ARO Westfield (June 14.34-36p3 at V=22.0-22.1)
S3729 283729 2002 UX from ISON New Mexico Obs. (June 14.31-32p3)
O2708 242708 2005 UK1 from Xuyi Sta. (June 13.74-77p3)
L9021 219021 1991 LH from MLS (June 14.34-36p4)
K9924 209924 2005 WS55 from ATLAS Haleakala (June 14.32-38p5)
J0161 190161 2005 TJ174 from ATLAS Haleakala (June 14.37-47p7)
G4121 164121 2003 YT1 from ATLAS Mauna Loa (June 14.25-27p4)
G2168 162168 1999 GT6 from CSS (June 14.35-36p4) and MLS (June 14.37-38p4)
F4268 154268 2002 RM129 from CSS (June 14.30-32p3) and PS1 (June 14.44-48p4)
E3637 143637 2003 LP6 from ARO Westfield (June 14.13-17p3 at V=22.1-3)
D8847 138847 2000 VE62 from MLS (June 14.17-18p4)
D6839 136839 1997 WT22 from PS1 (June 14.34-38p4) and ATLAS Mauna Loa (June 14.38-41p4)
96189 96189 Pygmalion (1991 NT3) from ATLAS Mauna Loa (June 14.48-51p4) and ATLAS Haleakala (June 14.50-60p9)
89959 89959 2002 NT7 from MLS (June 14.39-40p4)
87309 87309 2000 QP from CSS (June 14.41-43p4)
86829 86829 2000 GR146 from ATLAS Haleakala (June 14.51-56p5)
86324 86324 1999 WA2 from N. Falla via iTelescope Obs. Siding Spring (June 13.72-75p3)
67367 67367 2000 LY27 from ATLAS Mauna Loa (June 14.41-43p4)
66391 66391 1999 KW4 from Olmen Obs. (June 13.95-96p3)
40263 40263 1999 FQ5 from PS1 (June 14.59-60p4)
17274 17274 2000 LC16 from ATLAS Haleakala (June 14.50-59p9)
15745 15745 Yuliya (1991 PM5) from the Spacewatch 0.9m telescope (June 14.22-23p3)
07888 7888 1993 UC from PS1 (June 14.55-58p4)
06456 6456 Golombek (1992 OM) from ATLAS Mauna Loa (June 14.56-58p4)
05646 5646 1990 TR from PS1 (June 14.29-33p4), ATLAS Haleakala (June 14.32-42p9), and ATLAS Mauna Loa (June 14.36-39p4)
04954 4954 Eric (1990 SQ) from Campo dos Amarais Obs. (June 14.24-27p3)
04596 4596 1981 QB from CSS (June 14.41-43p3)
04197 4197 Morpheus (1982 TA) from ATLAS Mauna Loa (June 14.49-51p4) and ATLAS Haleakala (June 14.51-56p5)
01916 1916 Boreas (1953 RA) from ATLAS Mauna Loa (June 14.33-34p3)
01685 1685 Toro (1948 OA) from ATLAS Mauna Loa (June 14.32-35p4)
01627 1627 Ivar (1929 SH) from Olmen Obs. (June 13.89-90p3) and CSS (June 14.26-28p4)
00887 887 Alinda (1918 DB) from PS1 (June 14.40-43p3)
00433 433 Eros (1898 DQ) from CSS (June 14.43-44p4)

MPEC 2018-L77 - "00:07 UT" - 2005 PP

K05P00P 2005 PP (H=21.3 ~186m) from PS1 (June 13.58-60p4) and Mt. John Obs. (June 14.62p4)

Observers on 15 June '18

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

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 9 in MPEC 2018-L78 -- 2018 KH, 2018 JZ2, 2018 JO1, 2015 YP10, 2011 SR5, 2005 RB, 518507, 341050, 143637
`T05`	ATLAS Haleakala in Hawaii, 11 in MPEC 2018-L78 -- 2018 KC4, 2005 UY5, 96189, 86829, 518735, 385843, 209924, 190161, 17274, 5646, 4197
`T08`	ATLAS Mauna Loa in Hawaii, 12 in MPEC 2018-L78 -- 2018 KC4, 96189, 67367, 405212, 374851, 164121, 136839, 6456, 5646, 4197, 1916, 1685
`X74`	Campo dos Amarais Obs., 1 in MPEC 2018-L78 -- 4954
`703`	Catalina Sky Survey (CSS) in Arizona, 9 in MPEC 2018-L78 -- 2018 LK, 2018 KC3, 87309, 518640, 162168, 154268, 4596, 1627, 433
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPEC 2018-L78 -- 2018 LM, 2018 LH, 2018 FP3
`J04`	ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPEC 2018-L78 -- 2018 LM, 2018 LB1
`J95`	Great Shefford Obs. in England, 1 in MPEC 2018-L78 -- 2018 LK
`H15`	ISON New Mexico Obs. in New Mexico, 1 in MPEC 2018-L78 -- 283729
`Q628`	N. Falla in England via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-L78 -- 86324
`K38`	M57 Obs. in Italy, 1 in MPEC 2018-L78 -- 2018 GA5
`474`	Mt. John Obs. in New Zealand, 4 in MPECs 2018-L77 & 2018-L78 -- 2018 LM, 2017 XC62, 2016 JN34, 2005 PP
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 9 in MPEC 2018-L78 -- 2018 LK, 2018 JC3, 89959, 508767, 468909, 219021, 207398, 162168, 138847
`J69`	North Obs. in England, 1 in MPEC 2018-L78 -- 2015 DP155
`C23`	Olmen Obs. in Belgium, 2 in MPEC 2018-L78 -- 66391, 1627
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 18 in MPECs 2018-L77 & 2018-L78 -- 2018 LT3, 2018 LC1, 2018 JV2, 2018 JE5, 2018 JB3, 2012 MM11, 2008 MR1, 2005 PP, 2004 RO111, 505178, 468909, 463387, 40263, 154268, 136839, 7888, 5646, 887
`D29`	Purple Mtn. Obs. Xuyi Station in China, 2 in MPEC 2018-L78 -- 508796, 242708
`Y00`	SONEAR in Brazil, 1 in MPEC 2018-L78 -- 467309
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2018-L78 -- 15745
`291`	Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2018-L78 -- 2018 LC
`W34`	Squirrel Valley Obs. in North Carolina, 1 in MPEC 2018-L78 -- 467309
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2018-L78 -- 2018 LE1, 2018 LB1

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

Impact Risk Monitoring on 15 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 LM4	NEODyS	1500	2028-2118	34	1.57e-07	-3.30	-3.79	n/a	NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2018-06-11.451 to 2018-06-14.459."

2018 LV3	NEODyS	1500	2061	1	1.34e-07	-7.53	-7.53	0	NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2018-06-11.383 to 2018-06-14.182."

2018 LR3	NEODyS	1500	2077-2111	17	4.26e-06	-6.36	-6.49	0	NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2018-06-10.326 to 2018-06-14.262."

2018 LR2	NEODyS	1500	R E M O V E D						-

2018 LE1	JPL Sentry	1500	2102-2102	1	2.266e-06	-7.33	-7.33	0	JPL: Computed at 07:26 today Pacific time based on 47 observations spanning 8.0897 days (2018-Jun-05.39422 to 2018-Jun-13.483888). Diameter approximately 0.010 km. from weighted mean H=27.68.
2018 LE1	NEODyS	1500	2066-2112	5	2.06e-06	-7.38	-7.39	0	NEODyS: "Based on 46 optical observations (of which 1 are rejected as outliers) from 2018-06-05.395 to 2018-06-13.380."

2018 LD1	NEODyS	1500	2089	1	1.79e-08	-8.61	-8.61	0	NEODyS: "Based on 46 optical observations (of which 0 are rejected as outliers) from 2018-06-05.341 to 2018-06-13.388."

2018 LB1	NEODyS	1609	R E M O V E D						NEODyS #2 for the day

2018 LM	NEODyS	1500	R E M O V E D						-
2018 LM	JPL Sentry	1500	2112-2116	2	1.0527e-06	-6.56	-6.68	0	JPL: Computed at 07:33 today Pacific time based on 83 observations spanning 10.783 days (2018-Jun-04.25437 to 2018-Jun-15.03696). Diameter approximately 0.031 km. from weighted mean H=25.19.

2018 JG1	NEODyS	1500	2111-2118	3	7.15e-09	-8.30	-8.59	n/a	NEODyS: "Based on 80 optical observations (of which 0 are rejected as outliers) from 2018-05-08.180 to 2018-06-13.613."

2018 HJ2	NEODyS	1500	2085-2114	3	5.46e-06	-5.37	-5.52	0	NEODyS: "Based on 106 optical observations (of which 0 are rejected as outliers) from 2018-04-23.412 to 2018-05-23.461."

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 15 June '18

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

1820	Generated Traffic Report
1609	Noted that NEODyS has removed 2018 LB1 as an impact risk - see above
1500	Noted that NEODyS has updated its 2018 HJ2 risk assessment - see above Noted that NEODyS has updated its 2018 JG1 risk assessment - see above Noted that NEODyS has updated its 2018 LB1 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 removed 2018 LM as an impact risk - see above Noted that NEODyS has posted 2018 LM4 as an impact risk - see above Noted that NEODyS has removed 2018 LR2 as an impact risk - see above Noted that NEODyS has posted 2018 LR3 as an impact risk - see above Noted that NEODyS has posted 2018 LV3 as an impact risk - see above Grabbed MPEC 2018-L78 - Daily Orbit Update - see above
0017	Grabbed MPEC 2018-L77 - 2005 PP - see above

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