2018-06-18 Tracking News

Contents on 18 June '18

Traffic Report -- six objects
IAU Minor Planet Center
- NEOCP Activity -- 78 listings
- New MPECs -- ten MPECs
Observers -- 29 observers
Impact Risk Monitoring -- three objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 942 risk-listed objects, 29 have had news in the last 31 days. Updated at 2308 UTC on 18 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 18 June '18

Six objects reported inside ten LD

There are six minor objects reported to be less than ten lunar distances (LD) from Earth today. Nearest is risk-listed intruder 2018 LV3, which moves out from 7.24 to 9.70 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
0.86 LD June 15	2018 LV3	17 m	7.24 to 9.70 LD	June 11 - 19	intruder, risk

1.56 LD June 14	2018 LD1	18 m	8.33 to 10.76 LD	June 10 - 18	exits ten LD, risk

5.22 LD June 21	2018 LX5	29 m	8.95 from 11.20 LD	today - June 24	enters ten LD
6.50 LD June 21	2018 LS5	15 m	8.73 from 10.20 LD	today - June 25	enters ten LD
7.49 LD June 20	2018 MK	51 m	9.36 from 12.08 LD	today - June 22	NEW, enters ten LD - MPEC
7.62 LD June 15	2018 LK	155 m	9.70 to 11.63 LD	June 13 - 18	exits ten LD

Approaching
6.02 LD June 29	2018 LR3	18 m	10.82 from 11.51 LD	June 20 - July 8	NHATS target, risk - DOU

This report was generated at 1846 UTC with the discoveries of inbound 2018 MK (MPEC) and already departed 2018 MJ (MPEC), which went past us at 4.17 LD on June 13th. Today's DOU MPEC has follow-up for approaching risk-listed 2018 LR3 and for departed objects 2018 LR2 (risk), 2015 DP155, and 68347 2001 KB67.

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 18 June '18

The MPC's NEO Confirmation Page has 78 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 78 objects listed. Of these, 29 were "one nighters." So far The Tracking News has counted a total of 109 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 18 June '18

Minor Planet Electronic Circulars

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

MPEC 2018-M27 time-stamped "12:04 UT" - Daily Orbit Update - see below
MPEC 2018-M28 time-stamped "13:46 UT" - 2018 LO6 - see below
MPEC 2018-M29 time-stamped "13:52 UT" - 2018 LQ6 - see below
MPEC 2018-M30 time-stamped "13:59 UT" - 2018 LR6 - see below
MPEC 2018-M31 time-stamped "14:04 UT" - 2018 LS6 - see below
MPEC 2018-M32 time-stamped "14:09 UT" - 2018 LT6 - see below
MPEC 2018-M33 time-stamped "14:15 UT" - 2018 MH - see below
MPEC 2018-M34 time-stamped "14:21 UT" - 2018 MJ - see below
MPEC 2018-M35 time-stamped "14:26 UT" - 2018 MK - see below
MPEC 2018-M36 time-stamped "18:15 UT" - 2018 LZ13

MPEC 2018-M36 - "18:15 UT" - 2018 LZ13

K18L13Z 2018 LZ13 (risk listed, i=67.6°, Earth MOID=0.7 LD, H=20.4 ~282m) was picked up at 1236 UT on 15 June by Pan-STARRS 1 (PS1), observing it at June 15.53-54p3 at w=22.0-22.2. This detection was confirmed by Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (June 17.27-30p5 at G=21.8-22.1), the Spacewatch 1.8m telescope (June 17.38-40p4 at R=21.9-22.2), R. Wainscoat on Mauna Kea (June 17.52p3 at G=22.07-09), and Astronomical Research Obs. Westfield (June 18.30-31p3 at V=22.0-22.1).

MPEC 2018-M35 - "14:26 UT" - 2018 MK

K18M00K 2018 MK (Earth MOID=7.4 LD, H=24.3 ~47m) was picked up at 1152 UT on 17 June by ATLAS Haleakala, observing it at June 17.49-53p4. This detection was confirmed by PS1 (June 8.52-55p3), San Marcello Pistoiese Obs. (June 17.86-87p4), Visnjan Obs. (June 18.02p5), and Squirrel Valley Obs. (June 18.12-13p4).

MPEC 2018-M34 - "14:21 UT" - 2018 MJ

K18M00J 2018 MJ (Earth MOID=3.0 LD, H=26.1 ~20m) was picked up at 1005 UT on 17 June by PS1, observing it at June 17.42-46p3. This detection was confirmed by San Marcello Pistoiese Obs. (June 17.88-90p3) and Steward Obs. Mt. Lemmon Station (June 18.37-39p4).

MPEC 2018-M33 - "14:15 UT" - 2018 MH

K18M00H 2018 MH (small asteroid, H=23.2 ~78m) was picked up at 1104 UT on 16 June by PS1, observing it at May 23.42-46p4 at G=21.6-22.2 and June 16.46-50p4 at w=21.0-2. This detection was confirmed by Dave Balam via Plaskett 1.8m Telescope (June 17.36-37p3), R. Wainscoat/Mauna Kea (June 17.36p2), Visnjan Obs. (June 17.94p3), and Steward Mt. Lemmon Sta. (June 18.30-32p4).

MPEC 2018-M32 - "14:09 UT" - 2018 LT6

K18L06T 2018 LT6 (small asteroid, Earth MOID=9.1 LD, H=22.3 ~117m) was picked up at 1155 UT on 15 June by ATLAS Mauna Loa, observing it at June 15.50-53p5. This detection was confirmed by program code "*" (19) via Slooh.com Canary Islands Obs. (June 16.07-12p3), El Gato Gris Obs. (June 16.11-12p3), Arcadia Obs. (June 16.52-53p3 & 16.60p1), Moriyama Obs. (June 16.57p2), JAXA Space Tracking & Communications Center (JAXA STCC) (June 16.64-65p3), San Marcello Pistoiese Obs. (June 16.86-91p3), Frasso Sabino Obs. (June 16.94p3), Castelmartini Obs. (June 16.95-96p5), Visnjan Obs. (June 16.97-98p3), Farra d'Isonzo Obs. (June 17.00-02p2), the Spacewatch 0.9m telescope (June 17.30-31p2), Pascoli Obs. (June 17.94-95p3), and Squirrel Valley Obs. (June 18.19-23p4).

MPEC 2018-M31 - "14:04 UT" - 2018 LS6

K18L06S 2018 LS6 (small asteroid, H=22.1 ~129m) was picked up at 1034 UT on 14 June by PS1, observing it at June 14.44-48p3. This detection was confirmed by R. Wainscoat/Mauna Kea (June 16.39p3), Visnjan Obs. (June 16.92p2), and Steward Mt. Lemmon Sta. (June 18.18p3).

MPEC 2018-M30 - "13:59 UT" - 2018 LR6

K18L06R 2018 LR6 (H=20.4 ~282m) was picked up at 0807 UT on 14 June by ATLAS Haleakala, observing it at June 14.32-39p13. This detection was confirmed by Mt. John Obs. (June 16.34-35p4), Arcadia Obs. (June 16.37-44p6), Holmes/CTIO (June 16.96p3 & 17.97-98p3), and El Gato Gris Obs. (June 16.96-97p3).

MPEC 2018-M29 - "13:52 UT" - 2018 LQ6

K18L06Q 2018 LQ6 (i=44.1°, H=20.4 ~282m) was picked up at 0657 UT on 14 June by PS1, observing it at June 14.29-33p4. This detection was confirmed by Mt. John Obs. (June 14.47p4 & 16.35-36p4), Holmes/CTIO (June 15.03p3 & 17.98-99p3), Spacewatch 0.9m (June 15.19p2), and Steward Mt. Lemmon Sta. (June 18.28-29p4).

MPEC 2018-M28 - "13:46 UT" - 2018 LO6

K18L06O 2018 LO6 (H=20.3 ~295m) was picked up at 1328 UT on 11 June by PS1, observing it at June 11.56-59p4. This detection was confirmed by Steward Mt. Lemmon Sta. (June 12.45-46p3 & 18.41-43p4), Spacewatch 0.9m (June 12.45-46p2 & 13.44-45p3), and R. Wainscoat/Mauna Kea (June 12.61p3).

<< DOU on 18 June '18 >> MPEC 2018-M27 - "12:04 UT" - Daily Orbit Update

Observations of risk-listed objects
K18L04M 2018 LM4 (arc=4 days, H=18.7 ~616m) from UH/Tholen NEO Follow-Up 2.24m Telescope (June 15.60p3)
K18L03R 2018 LR3 (small asteroid, arc=8 days, H=26.3 ~19m, close passer, NHATS target) from Spacewatch 1.8m (June 18.25-26p3)
Observations of recently (no longer) risk-listed objects
K18L02R 2018 LR2 (small asteroid, arc=7 days, H=26.0 ~21m, close passer) from Tholen 2.24m (June 15.62p1)
Observations of close-passing objects
K15DF5P 2015 DP155 (arc=2 opp, H=21.5 ~170m, NHATS target) from N.V. Maigurova via Nikolaev Obs. (June 14.93-95p8) and ATLAS Haleakala (June 17.58-61p4)
68347 68347 2001 KB67 (radar support) from the Palomar Transient Factory (PTF) (June 14.29-34p4) and Castelmartini Obs. (June 16.97p3)
Observation campaigns (NHATS targets, radar support)
K18L03O 2018 LO3 (arc=13 days, H=25.5 ~27m, NHATS) from PS1 (June 17.42-46p3)
K06Y00P 2006 YP (arc=3 opp, H=23.9 ~56m, NHATS) from PS1 (June 17.53-56p3 at w=21.6-22.1)
07341 7341 1991 VK (radar) from PS1 (June 17.56-59p4)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small asteroids (H>22.0)
K18M00A 2018 MA (arc=3 days, H=24.3 ~47m) from R. Wainscoat/Mauna Kea (June 17.53p3)
K18L05L 2018 LL5 (arc=9 days, H=22.8 ~93m) from ARO Westfield (June 17.16-17p2)
K18L04E 2018 LE4 (arc=6 days, H=23.8 ~59m) from PS1 (June 17.41-44p3)
Observations of other objects
K18L05O 2018 LO5 (i=48.3°, arc=5 days, H=20.8 ~234m) from the Mt. Lemmon Survey (MLS) (June 18.25-27p4) and PS1 (June 18.32-35p4)
K18L03C 2018 LC3 (i=44.4°, arc=11 days, H=18.7 ~616m) from Spacewatch 0.9m (June 18.40-43p3)
K18L00N 2018 LN (arc=13 days, H=20.3 ~295m) from PS1 (June 17.43-45p3)
K17U05Y 2017 UY5 (arc=2 opp, H=18.9 ~562m) from PS1 (June 17.31-34p4 at w=21.9-22.6)
K16CQ4X 2016 CX264 (arc=2 opp, H=19.4 ~446m) from Spacewatch 0.9m (June 18.16-18p3)
K15Y10P 2015 YP10 (arc=3 opp, H=20.2 ~309m) from PS1 (June 17.42-46p4 at w=21.9-22.2)
K15W02O 2015 WO2 (arc=2 opp, H=19.9 ~355m) from PS1 (June 17.27-30p4 at w=21.8-22.1)
K13J29G 2013 JG29 (arc=3 opp, H=20.7 ~245m) from PS1 (June 17.33-35p3)
K12R16S 2012 RS16 (arc=3 opp, H=21.2 ~195m) from PS1 (June 17.32-34p3)
K02O04S 2002 OS4 (arc=5 opp, H=18.3 ~741m) from PS1 (June 17.57-59p4)
J99R32B 1999 RB32 (arc=2 opp, H=20.1 ~323m) from R. Wainscoat/Mauna Kea (June 17.54p3)
J99R02V 1999 RV2 (arc=3 opp, H=18.7 ~616m) from PS1 (June 17.52-55p3)
o8767 508767 1993 BD2 from PS1 (June 17.36-38p3)
o7847 507847 2014 GM1 from PS1 (June 17.28-31p8)
k7309 467309 1996 AW1 from Castelmartini Obs. (June 16.96-97p3)
j0648 450648 2006 UC63 from PS1 (June 17.42-46p2)
Z7414 357414 2003 XE from PS1 (June 17.52-54p3)
J3178 193178 2000 PK5 from PS1 (June 17.32-34p3 at w=22.4-6)
F3957 153957 2002 AB29 from Castelmartini Obs. (June 16.98-99p3)
D9345 139345 2001 KA67 from Maigurova/Nikolaev Obs. (June 14.90-92p8)
66391 66391 1999 KW4 from Castelmartini Obs. (June 16.87p3)
25916 25916 2001 CP44 from Squirrel Valley Obs. (June 18.09-11p4)
24761 24761 Ahau (1993 BW2) from PS1 (June 17.41-45p4)
18882 18882 1999 YN4 from PS1 (June 17.57-60p4)
15745 15745 Yuliya (1991 PM5) from Castelmartini Obs. (June 16.98p3)
07025 7025 1993 QA from Pan-STARRS 2 (PS2) (June 17.51-54p4)
05626 5626 1991 FE from PS1 (June 17.32-35p4)
05011 5011 Ptah (6743 P-L) from PS1 (June 17.53-56p4)
03552 3552 Don Quixote (1983 SA) from Campo Catino Austral Obs. (CAO) (June 17.36-42p4)
01627 1627 Ivar (1929 SH) from Castelmartini Obs. (June 16.88-89p3)

Observers on 18 June '18

A total of 29 observers appear in today's MPECs.

Code	Observer / observatory
`E23`	Arcadia Obs. in New South Wales, 2 in MPECs 2018-M30 & 2018-M32 -- 2018 LT6, 2018 LR6
`H21`	Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2018-M27 & 2018-M36 -- 2018 LZ13, 2018 LL5
`T05`	ATLAS Haleakala in Hawaii, 3 in MPECs 2018-M27, 2018-M30 & 2018-M35 -- 2018 MK, 2018 LR6, 2015 DP155
`T08`	ATLAS Mauna Loa in Hawaii, 1 in MPEC 2018-M32 -- 2018 LT6
`W96`	Campo Catino Austral Obs. in Chile, 1 in MPEC 2018-M27 -- 3552
`160`	Castelmartini Obs. in Italy, 7 in MPECs 2018-M27 & 2018-M32 -- 2018 LT6, 68347, 66391, 467309, 15745, 153957, 1627
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2018-M29, 2018-M30 & 2018-M36 -- 2018 LZ13, 2018 LR6, 2018 LQ6
`I19`	El Gato Gris Obs. in Argentina, 2 in MPECs 2018-M30 & 2018-M32 -- 2018 LT6, 2018 LR6
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2018-M32 -- 2018 LT6
`157`	Frasso Sabino Obs. in Italy, 1 in MPEC 2018-M32 -- 2018 LT6
`P93`	JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-M32 -- 2018 LT6
`568^`	R. Wainscoat on Mauna Kea in Hawaii, 6 in MPECs 2018-M27, 2018-M28, 2018-M31, 2018-M33 & 2018-M36 -- 2018 MH, 2018 MA, 2018 LZ13, 2018 LS6, 2018 LO6, 1999 RB32
`900`	Moriyama Obs. in Japan, 1 in MPEC 2018-M32 -- 2018 LT6
`474`	Mt. John Obs. in New Zealand, 2 in MPECs 2018-M29 & 2018-M30 -- 2018 LR6, 2018 LQ6
`G96`	Mt. Lemmon Survey in Arizona, 1 in MPEC 2018-M27 -- 2018 LO5
`0895`	N.V. Maigurova via Nikolaev Obs. in Ukraine, 2 in MPEC 2018-M27 -- 2015 DP155, 139345
`I41`	Palomar Transient Factory in southern California, 1 in MPEC 2018-M27 -- 68347
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 29 in MPECs 2018-M27, 2018-M28, 2018-M29, 2018-M31, 2018-M33, 2018-M34, 2018-M35 & 2018-M36 -- 2018 MK, 2018 MJ, 2018 MH, 2018 LZ13, 2018 LS6, 2018 LQ6, 2018 LO6, 2018 LO5, 2018 LO3, 2018 LN, 2018 LE4, 2017 UY5, 2015 YP10, 2015 WO2, 2013 JG29, 2012 RS16, 2006 YP, 2002 OS4, 1999 RV2, 508767, 507847, 450648, 357414, 24761, 193178, 18882, 7341, 5626, 5011
`F52`	Pan-STARRS 2 in Hawaii, 1 in MPEC 2018-M27 -- 7025
`K63`	Pascoli Obs. in Italy, 1 in MPEC 2018-M32 -- 2018 LT6
`6581`	Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2018-M33 -- 2018 MH
`104`	San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2018-M32, 2018-M34 & 2018-M35 -- 2018 MK, 2018 MJ, 2018 LT6
`G40*`	program code "*" (19) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-M32 -- 2018 LT6
`691`	Spacewatch 0.9m telescope in Arizona, 5 in MPECs 2018-M27, 2018-M28, 2018-M29 & 2018-M32 -- 2018 LT6, 2018 LQ6, 2018 LO6, 2018 LC3, 2016 CX264
`291`	Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2018-M27 & 2018-M36 -- 2018 LZ13, 2018 LR3
`W34`	Squirrel Valley Obs. in North Carolina, 3 in MPECs 2018-M27, 2018-M32 & 2018-M35 -- 2018 MK, 2018 LT6, 25916
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 5 in MPECs 2018-M28, 2018-M29, 2018-M31, 2018-M33 & 2018-M34 -- 2018 MJ, 2018 MH, 2018 LS6, 2018 LQ6, 2018 LO6
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2018-M27 -- 2018 LR2, 2018 LM4
`L01`	Visnjan Obs., 4 in MPECs 2018-M31, 2018-M32, 2018-M33 & 2018-M35 -- 2018 MK, 2018 MH, 2018 LT6, 2018 LS6

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

Impact Risk Monitoring on 18 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 LZ13	JPL Sentry	2104	2036-2113	35	4.670733e-07	-3.40	-3.69	0	JPL: Computed at 12:32 today Pacific time based on 18 observations spanning 2.7861 days (2018-Jun-15.52506 to 2018-Jun-18.31119). Diameter approximately 0.271 km. from weighted mean H=20.45.

2018 LM4	NEODyS	1534	R E M O V E D						-
2018 LM4	JPL Sentry	1500	R E M O V E D						JPL: Risk listing removed at 1402 UTC today

2018 LR3	JPL Sentry	1500	2077-2111	5	8.7998e-06	-6.01	-6.08	0	JPL: Computed at 07:06 today Pacific time based on 31 observations spanning 7.9301 days (2018-Jun-10.32538 to 2018-Jun-18.25548). Diameter approximately 0.018 km. from weighted mean H=26.35.

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 18 June '18

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

2104	Noted that JPL Sentry has posted 2018 LZ13 as an impact risk - see above
1846	Generated Traffic Report
1832	Grabbed MPEC 2018-M36 - 2018 LZ13 - see above
1534	Noted that NEODyS has removed 2018 LM4 as an impact risk - see above
1500	Noted that JPL Sentry has removed 2018 LM4 as an impact risk - see above Noted that JPL Sentry has updated its 2018 LR3 risk assessment - see above Grabbed MPEC 2018-M27 - Daily Orbit Update - see above Grabbed MPEC 2018-M28 - 2018 LO6 - see above Grabbed MPEC 2018-M29 - 2018 LQ6 - see above Grabbed MPEC 2018-M30 - 2018 LR6 - see above Grabbed MPEC 2018-M31 - 2018 LS6 - see above Grabbed MPEC 2018-M32 - 2018 LT6 - see above Grabbed MPEC 2018-M33 - 2018 MH - see above Grabbed MPEC 2018-M34 - 2018 MJ - see above Grabbed MPEC 2018-M35 - 2018 MK - see above

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