2018-06-04 Tracking News

Contents on 4 June '18

Traffic Report -- two objects
IAU Minor Planet Center
- NEOCP Activity -- 24 listings
- New MPECs -- four MPECs
Observers -- 27 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 1511 UTC on 4 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 4 June '18

Two objects reported inside ten LD

Two transient natural objects are reported within ten lunar distances (LD) of our home world today. Newly announced risk-listed 2018 LB is the closest, moving out from 5.30 to 6.83 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	5.30 to 6.83 LD	May 26 - June 6	NEW, NHATS target, risk - MPEC

5.56 LD June 10	2018 EJ4	186 m	9.80 from 10.97 LD	today - June 16	radar/NHATS target, enters ten LD - DOU

Approaching
8.96 LD June 11	2015 DP155	162 m	10.88 from 11.46 LD	June 6 - 15	NHATS target - DOU

This report was generated at 1825 UTC with the discovery of outbound risk-listed 2018 LB (MPEC) and with follow-up in today's DOU MPEC for inbound 2018 EJ4 and approaching 2015 DP155 as well as distant 2015 b;BL311.

<< Reading: The American Meteor Society has a news item about 2018 LA's atmospheric impact over southern Africa. See also the International Meteor Organization's event page and our links page.

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 4 June '18

The MPC's NEO Confirmation Page has 24 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 24 objects listed. Of these, seven were "one nighters." So far The Tracking News has counted a total of 27 listings on the NEOCP today.

New MPECs on 4 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-L05 time-stamped "01:29 UT" - 2018 LB - see below
MPEC 2018-L06 time-stamped "01:32 UT" - 2018 LC - see below
MPEC 2018-L07 time-stamped "12:02 UT" - Daily Orbit Update - see below
MPEC 2018-L08 time-stamped "19:00 UT" - 2016 CC194

MPEC 2018-L08 - "19:00 UT" - 2016 CC194

K16CJ4C 2016 CC194 (small asteroid, H=23.3 ~74m) from UH/Tholen NEO Follow-Up 2.24m Telescope (April 18.50p1 at G=23.94, May 8.41-43p6 at G=23.62-24.10, 15.45-49p3 at G=23.93-24.17 & 22.37-39p3 at G=24.21-42)

<< DOU on 4 June '18 >> MPEC 2018-L07 - "12:02 UT" - Daily Orbit Update

Observations of close-passing objects
K18E04J 2018 EJ4 (arc=82 days, H=21.3 ~186m, NHATS target, radar support) from Burnt Tree Hill Obs. (June 3.26-33p7, 3.38p1 & 3.43p3) and the Catalina Sky Survey (CSS) (June 3.29-30p4)
K15DF5P 2015 DP155 (arc=2 opp, H=21.4 ~178m, NHATS target) from LCO Tenerife Aqawan A#1 (May 30.03-16p12) and ATLAS Haleakala (June 3.45-48p4)
K15BV1L 2015 BL311 (q=0.370 AU, Q=4.365 AU, arc=2 opp, H=21.0 ~214m) from Pan-STARRS 1 (PS1) (June 4.28-32p4)
Observation campaigns (NHATS targets, radar support)
K18L00C 2018 LC (arc=2 days, H=25.2 ~31m, NHATS) from the Spacewatch 0.9m telescope (June 4.17-19p3)
K18K01D 2018 KD1 (arc=17 days, H=24.5 ~43m, NHATS) from Steward Obs. Mt. Lemmon Station (June 4.28-29p3)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K18K03C 2018 KC3 (arc=11 days, H=23.1 ~81m) from Steward Mt. Lemmon Sta. (June 4.31p2)
K18K02S 2018 KS2 (Q=4.239 AU, arc=13 days, H=22.6 ~102m) from Steward Mt. Lemmon Sta. (June 4.22-24p4)
K18K01Q 2018 KQ1 (arc=16 days, H=23.5 ~68m) from Steward Mt. Lemmon Sta. (June 4.33p3)
K18K00H 2018 KH (arc=19 days, H=24.5 ~43m) from Steward Mt. Lemmon Sta. (June 4.33p4)
K18J02V 2018 JV2 (arc=23 days, H=23.7 ~62m) from Spacewatch 0.9m (June 4.24-25p3) and Steward Mt. Lemmon Sta. (June 4.30-31p3)
K18E04R 2018 ER4 (arc=81 days, H=22.2 ~123m) from Wobblesock Obs. (June 3.41-42p3)
K18K01H 2018 KH1 (arc=17 days, H=22.0 ~135m) from Steward Mt. Lemmon Sta. (June 4.28p4)
K18K00L 2018 KL (arc=19 days, H=21.9 ~141m) from Spacewatch 0.9m (June 4.26-28p3) and Steward Mt. Lemmon Sta. (June 4.30-31p3)
Observations of other objects
K18K03F 2018 KF3 (arc=9 days, H=19.8 ~371m) from Steward Mt. Lemmon Sta. (June 4.38p4 & 4.43-44p4)
K18K03D 2018 KD3 (arc=10 days, H=20.8 ~234m) from Steward Mt. Lemmon Sta. (June 4.31-32p3)
K18K02L 2018 KL2 (arc=14 days, H=21.7 ~155m) from Steward Mt. Lemmon Sta. (June 4.29p3) and Spacewatch 0.9m (June 4.30-32p3)
K18K01M 2018 KM1 (q=0.353 AU, arc=16 days, H=20.8 ~234m) from Spacewatch 0.9m (June 2.27-29p3) and Steward Mt. Lemmon Sta. (June 4.29-30p4)
K18K01G 2018 KG1 (Q=4.280 AU, arc=17 days, H=19.1 ~513m) from Steward Mt. Lemmon Sta. (June 4.27p4)
K18J05E 2018 JE5 (arc=20 days, H=20.6 ~257m) from Steward Mt. Lemmon Sta. (June 4.31-32p4)
K18J02D 2018 JD2 (i=51.0°, q=0.214 AU, arc=26 days, H=18.9 ~562m) from Steward Mt. Lemmon Sta. (June 4.27p4)
K18J01Q 2018 JQ1 (arc=27 days, H=21.4 ~178m) from Spacewatch 0.9m (June 4.24-25p3)
K18J01E 2018 JE1 (arc=28 days, H=19.9 ~355m) from Steward Mt. Lemmon Sta. (June 4.27p4)
K18J00L 2018 JL (Q=4.921 AU, arc=30 days, H=20.7 ~245m) from Steward Mt. Lemmon Sta. (June 4.25-26p4)
K18J00E 2018 JE (arc=31 days, H=20.9 ~224m) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (June 4.08p3)
K18J00A 2018 JA (arc=31 days, H=20.4 ~282m) from Wobblesock Obs. (June 3.38-39p2)
K18G05A 2018 GA5 (Q=4.921 AU, arc=51 days, H=18.3 ~741m) from PS1 (June 3.55-59p3)
K18G04Z 2018 GZ4 (arc=52 days, H=20.4 ~282m) from Steward Mt. Lemmon Sta. (June 4.22-23p4 at G=21.5-23.2)
K18F01S 2018 FS1 (arc=78 days, H=20.8 ~234m) from Steward Mt. Lemmon Sta. (June 4.25-26p4)
K18E02M 2018 EM2 (arc=89 days, H=20.6 ~257m) from Steward Mt. Lemmon Sta. (June 4.21-22p4)
K18C02E 2018 CE2 (arc=117 days, H=20.5 ~269m) from Holmes/CTIO (June 4.11-12p3)
K18B02Y 2018 BY2 (arc=152 days, H=20.5 ~269m) from Steward Mt. Lemmon Sta. (June 4.35-37p3)
K16J24J 2016 JJ24 (q=0.317 AU, arc=3 opp, H=19.9 ~355m) from the Spacewatch 1.8m telescope (June 4.34-40p3)
K16CQ4X 2016 CX264 (arc=2 opp, H=19.4 ~446m) from PS1 (June 3.27-31p4)
K15TH8Q 2015 TQ178 (arc=3 opp, H=20.4 ~282m) from PS1 (June 3.28-31p3)
K15DJ7Z 2015 DZ197 (arc=2 opp, H=18.5 ~676m) from Spacewatch 1.8m (June 4.24-27p2)
K11M01V 2011 MV1 (arc=4 opp, H=20.2 ~309m) from PS1 (June 3.32-35p2)
K01SH0C 2001 SC170 (arc=2 opp, H=20.5 ~269m) from CSS (June 3.26-28p3)
p8737 518737 2009 OO9 from Spacewatch via Kitt Peak Natl. Obs. (KPNO) (May 27.27-30p3)
p8507 518507 2006 EE1 from Astronomical Research Obs. Westfield (May 22.27-31p3 at V=22.1-2)
p8463 518463 2005 JY80 from WISE (May 23.19p1, 23.32p1, 23.45p1, 23.58p1, 23.71p1, 23.84p1, 25.28p1, 30.19p1, 30.26p1, 30.32p1, 30.39p1, 30.45p1, 30.52p1, 30.58p1, 30.65p1, 30.71p2, 30.91p1, 30.98p1, 31.04p1, 31.11p1, 31.17p1, 31.24p1, 31.30p1, 31.43p1, 31.50p1, 31.56p2, 31.70p1, 31.76p1, 31.83p1, 31.89p1, 31.96p1, June 1.02p1, 1.09p1, 1.15p1, 1.22p1 & 1.28p1)
p4652 514652 2005 SC71 from CSS (June 3.26-28p4) and Pan-STARRS 2 (PS2) (June 3.34-36p3)
o7847 507847 2014 GM1 from PS1 (June 3.32-36p4)
l4574 474574 2004 FG1 from the Palomar Transient Factory (PTF) (June 3.26-32p5)
k7309 467309 1996 AW1 from ATLAS Mauna Loa (June 3.52-54p3)
j8122 458122 2010 EW45 from Spacewatch 0.9m (June 3.25-28p3)
j0648 450648 2006 UC63 from CSS (June 3.28-30p4)
e8752 408752 1991 TB2 from ATLAS Mauna Loa (June 3.25-28p7)
d9611 399611 2004 BE11 from CSS (June 3.20-22p3)
d7237 397237 2006 KZ112 from CSS (June 3.41-43p4)
R8327 278327 2007 HA59 from ATLAS Haleakala (June 3.29-32p4)
R7570 277570 2005 YP180 from PS1 (June 3.32-35p4)
P9802 259802 2004 BJ86 from the Mt. Lemmon Survey (MLS) (June 3.25-26p4)
M0839 220839 2004 VA from ATLAS Mauna Loa (June 3.40-43p3)
G4217 164217 2004 PT42 from MLS (June 3.23-24p3)
G4201 164201 2004 EC from CSS (June 3.18-19p4)
G3691 163691 2003 BB43 from WISE (May 31.03p1, 31.16p1, 31.29p1, 31.36p2, 31.42p1, 31.49p1, 31.55p1, 31.62p1, 31.68p1, 31.75p1, 31.95p2, June 1.01p1, 1.14p1, 1.21p1 & 1.27p1)
G2483 162483 2000 PJ5 from MLS (June 3.42-44p4)
F2964 152964 2000 GP82 from CSS (June 3.18-19p3)
F2931 152931 2000 EA107 from CSS (June 3.16-17p4)
E1531 141531 2002 GB from PS1 (June 3.28-30p3)
D9345 139345 2001 KA67 from JAXA Space Tracking & Communications Center (JAXA STCC) (June 3.71p4)
D8847 138847 2000 VE62 from PTF (June 3.17p1 & 3.22-30p7), PS2 (June 3.32-36p4), ATLAS Haleakala (June 3.41-44p7), and JAXA STCC (June 3.70p4)
B5052 115052 2003 RD6 from MLS (June 3.40-42p3)
86666 86666 2000 FL10 from PTF (June 3.25-31p4)
66391 66391 1999 KW4 from Chinon Obs. (June 2.89-94p10), Gravina Obs. (June 3.93-94p7), and North Obs. (June 3.94-95p4)
53110 53110 1999 AR7 from MLS (June 3.16-18p4)
37655 37655 Illapa (1994 PM) from CSS (June 3.24-26p4)
25916 25916 2001 CP44 from ATLAS Mauna Loa (June 3.50-53p4) and Gravina Obs. (June 3.91p3)
24761 24761 Ahau (1993 BW2) from CSS (June 3.28-30p4)
15745 15745 Yuliya (1991 PM5) from PTF (June 3.25-27p2, 3.33p1 & 3.38p1) and CSS (June 3.33-35p4)
09856 9856 1991 EE from ATLAS Haleakala (June 3.27-31p3)
03752 3752 Camillo (1985 PA) from ATLAS Haleakala (June 3.34-36p7)
01866 1866 Sisyphus (1972 XA) from ATLAS Haleakala (June 3.32-35p8)
01685 1685 Toro (1948 OA) from PS1 (June 3.28-31p3)
01627 1627 Ivar (1929 SH) from Gravina Obs. (June 3.87-88p5)
01580 1580 Betulia (1950 KA) from ATLAS Haleakala (June 3.30-32p3)

MPEC 2018-L06 - "01:32 UT" - 2018 LC

K18L00C 2018 LC (H=25.2 ~31m, NHATS) was picked up at 0421 UT on 2 June by MLS, observing it at June 2.18-20p3. This detection was confirmed by Steward Mt. Lemmon Sta. (June 2.23-24p4), Schiaparelli Obs. (June 2.90-93p2), and Visnjan Obs. (June 3.85p2).

MPEC 2018-L05 - "01:29 UT" - 2018 LB

K18L00B 2018 LB (risk listed, Earth MOID=0.9 LD, H=26.0 ~21m, close passer, NHATS target) was picked up at 0402 UT on 1 June by PTF, observing it at June 1.17p4 and 1.24p2. This detection was confirmed by JAXA STCC (June 1.54p5), Moriyama Obs. (June 1.61-62p4), Lulin Minor Bodies Tracking (LIMIT) (June 1.65p6), Visnjan Obs. (June 1.87-88p6), Farra d'Isonzo Obs. (June 1.88p3), and ARO Westfield (June 2.14-15p3).

Observers on 4 June '18

A total of 27 observers appear in today's MPECs.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2018-L05 & 2018-L07 -- 2018 LB, 518507
`T05`	ATLAS Haleakala in Hawaii, 7 in MPEC 2018-L07 -- 2015 DP155, 278327, 138847, 9856, 3752, 1866, 1580
`T08`	ATLAS Mauna Loa in Hawaii, 4 in MPEC 2018-L07 -- 467309, 408752, 25916, 220839
`U63`	Burnt Tree Hill Obs., 1 in MPEC 2018-L07 -- 2018 EJ4
`703`	Catalina Sky Survey (CSS) in Arizona, 12 in MPEC 2018-L07 -- 2018 EJ4, 2001 SC170, 514652, 450648, 399611, 397237, 37655, 24761, 164201, 15745, 152964, 152931
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPEC 2018-L07 -- 2018 JE, 2018 CE2
`B92`	Chinon Obs. in France, 1 in MPEC 2018-L07 -- 66391
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2018-L05 -- 2018 LB
`K73`	Gravina Obs. in Italy, 3 in MPEC 2018-L07 -- 66391, 25916, 1627
`P93`	JAXA Space Tracking & Communications Center (JAXA STCC) in Japan, 3 in MPECs 2018-L05 & 2018-L07 -- 2018 LB, 139345, 138847
`695^`	Spacewatch via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2018-L07 -- 518737
`Z21`	LCO Tenerife Aqawan A#1 in the Canary Islands, 1 in MPEC 2018-L07 -- 2015 DP155
`D35`	Lulin Minor Bodies Tracking in Taiwan, 1 in MPEC 2018-L05 -- 2018 LB
`900`	Moriyama Obs. in Japan, 1 in MPEC 2018-L05 -- 2018 LB
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2018-L06 & 2018-L07 -- 2018 LC, 53110, 259802, 164217, 162483, 115052
`J69`	North Obs. in England, 1 in MPEC 2018-L07 -- 66391
`I41`	Palomar Transient Factory (PTF) in southern California, 5 in MPECs 2018-L05 & 2018-L07 -- 2018 LB, 86666, 474574, 15745, 138847
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 9 in MPEC 2018-L07 -- 2018 GA5, 2016 CX264, 2015 TQ178, 2015 BL311, 2011 MV1, 507847, 277570, 141531, 1685
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 2 in MPEC 2018-L07 -- 514652, 138847
`204`	Schiaparelli Obs. in Italy, 1 in MPEC 2018-L06 -- 2018 LC
`691`	Spacewatch 0.9m telescope in Arizona, 7 in MPEC 2018-L07 -- 2018 LC, 2018 KM1, 2018 KL2, 2018 KL, 2018 JV2, 2018 JQ1, 458122
`291`	Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2018-L07 -- 2016 JJ24, 2015 DZ197
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 22 in MPECs 2018-L06 & 2018-L07 -- 2018 LC, 2018 KS2, 2018 KQ1, 2018 KM1, 2018 KL2, 2018 KL, 2018 KH1, 2018 KH, 2018 KG1, 2018 KF3, 2018 KD3, 2018 KD1, 2018 KC3, 2018 JV2, 2018 JL, 2018 JE5, 2018 JE1, 2018 JD2, 2018 GZ4, 2018 FS1, 2018 EM2, 2018 BY2
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-L08 -- 2016 CC194
`L01`	Visnjan Obs., 2 in MPECs 2018-L05 & 2018-L06 -- 2018 LC, 2018 LB
`C51`	WISE in Earth polar orbit, 2 in MPEC 2018-L07 -- 518463, 163691
`E08`	Wobblesock Obs. in New South Wales, 2 in MPEC 2018-L07 -- 2018 JA, 2018 ER4

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

Impact Risk Monitoring on 4 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	JPL Sentry	0307	2092-2116	11	3.61698e-06	-6.29	-6.81	0	JPL: Computed at 19:49 June 3rd Pacific time based on 33 observations spanning .97953 days (2018-Jun-01.16813 to 2018-Jun-02.147665). Diameter approximately 0.022 km. from weighted mean H=25.99.

2018 LA	NEODyS	1510	2018	1	1.0e+00	2.13	2.13	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	0307	2018-2116	977	8.85048880999998e-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 4 June '18

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

1930	Grabbed MPEC 2018-L08 - 2016 CC194 - see above
1825	Generated Traffic Report
1510	Noted that NEODyS has posted 2018 LA as an impact risk - see above Grabbed MPEC 2018-L07 - Daily Orbit Update - see above
0307	Noted that JPL Sentry has updated its 2014 LY21 risk assessment - see above Noted that JPL Sentry has posted 2018 LB as an impact risk - see above Grabbed MPEC 2018-L05 - 2018 LB - see above Grabbed MPEC 2018-L06 - 2018 LC - see above

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