Contents  on 19 June '18

Asteroid/Comet Connection (A/CC) Resources:

The latest A/CC news is available via framed access, RSS news feed 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 19 June '18

Four objects reported inside ten LD

Four planetesimals are reported inside ten lunar distances (LD) of our planet today. Nearest is 2018 LX5, which is inbound from 8.94 to 6.97 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  9.70 to 12.17 LD June 11 - 19 intruder, exits ten LD, risk
5.22 LD June 21 2018 LX5 30 m  6.97 from 8.94 LD yesterday - June 24 DOU
6.50 LD June 21 2018 LS5 15 m  7.53 from 8.73 LD yesterday - June 25
7.49 LD tomorrow 2018 MK 51 m  7.69 from 9.36 LD yesterday - June 22 DOU
Approaching
6.02 LD June 29 2018 LR3 18 m  10.15 from 10.82 LD tomorrow - July 8 NHATS target, risk - DOU

This report was generated at 1726 UTC with the discovery of already departed 2018 LM15 (MPEC), which flew by us at 5.69 LD on June 9th. Today's DOU MPEC has the recovery of distant 68216 2001 CV26 and follow-up for three objects in the above table and for departed objects 2018 KU, 2015 DP155, 68347 2001 KB67, and risk-listed objects 2018 LT5 and 2018 LM.

Editor's note: A/CC news coverage will be interrupted and slow to update tomorrow and for the rest of today. There may be no traffic report tomorrow, but the data will be captured and news should be reported by Thursday or sooner.



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 19 June '18

The MPC's NEO Confirmation Page has 73 listings

When last checked at 2031 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 73 objects listed. Of these, 24 were "one nighters." The Tracking News counted a total of 85 listings on the NEOCP on this day.

New MPECs  on 19 June '18

Minor Planet Electronic Circulars

There were 21 MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-M57 - "23:56 UT" - 2018 MG5


MPEC 2018-M56 - "23:52 UT" - 2018 MF5


MPEC 2018-M55 - "23:48 UT" - 2018 ME5


MPEC 2018-M54 - "23:44 UT" - 2018 MD5


MPEC 2018-M53 - "23:39 UT" - 2018 MC5


MPEC 2018-M52 - "23:35 UT" - 2018 MB5


MPEC 2018-M51 - "23:30 UT" - 2018 MA5


MPEC 2018-M50 - "23:25 UT" - 2018 LX15


MPEC 2018-M49 - "22:05 UT" - 2018 MY4


MPEC 2018-M48 - "22:01 UT" - 2018 MX4


MPEC 2018-M47 - "21:57 UT" - 2018 MW4


MPEC 2018-M46 - "21:53 UT" - 2018 MV4


MPEC 2018-M45 - "21:49 UT" - 2018 MU4


MPEC 2018-M44 - "21:45 UT" - 2018 LU15


MPEC 2018-M43 - "21:34 UT" - 2018 LT15


MPEC 2018-M42 - "21:30 UT" - 2018 LS15


MPEC 2018-M41 - "21:27 UT" - 2018 LR15


MPEC 2018-M40 - "21:23 UT" - 2018 LQ15


<< DOU on 19 June '18 >>  MPEC 2018-M39 - "12:04 UT" - Daily Orbit Update


MPEC 2018-M38 - "11:38 UT" - 2001 RQ17


MPEC 2018-M37 - "10:33 UT" - 2018 LM15

Observers  on 19 June '18

A total of 31 observers appeared in this day's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 8 in MPECs 2018-M39, 2018-M42, 2018-M43, 2018-M45, 2018-M46, 2018-M51, 2018-M52 & 2018-M57 -- 2018 MV4, 2018 MU4, 2018 MH, 2018 MG5, 2018 MB5, 2018 MA5, 2018 LT15, 2018 LS15
T05ATLAS Haleakala in Hawaii, 27 in MPEC 2018-M39 -- 2018 KC3, 2018 JC3, 2013 QH10, 2011 GA62, 2004 LH, 85989, 68350, 68347, 66391, 66251, 518635, 475967, 467309, 439313, 408752, 36183, 25916, 220839, 162120, 15745, 153957, 14402, 139345, 13553, 5604, 1627, 1036
T08ATLAS Mauna Loa in Hawaii, 16 in MPEC 2018-M39 -- 2005 UY5, 96189, 90367, 86829, 67367, 65706, 518735, 444935, 405212, 278327, 17274, 138847, 5646, 1916, 1866, 1685
X74Campo dos Amarais Obs., 1 in MPEC 2018-M39 -- 2011 UA
160Castelmartini Obs. in Italy, 15 in MPEC 2018-M39 -- 2018 LX5, 2018 LN4, 68950, 68347, 66391, 467309, 455550, 415029, 162168, 15745, 152637, 13553, 7889, 1627, 719
703Catalina Sky Survey (CSS) in Arizona, 24 in MPEC 2018-M39 -- 2018 LU3, 2018 LG, 2012 UV27, 2004 LH, 89959, 65996, 518469, 518463, 511523, 475967, 25916, 253062, 220839, 18882, 18109, 162168, 139359, 136839, 112985, 7350, 6569, 6456, 2061, 1685
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 17 in MPECs 2018-M38, 2018-M39, 2018-M40, 2018-M41, 2018-M42, 2018-M45, 2018-M46, 2018-M47, 2018-M48, 2018-M49, 2018-M51, 2018-M52, 2018-M53, 2018-M54 & 2018-M55 -- 2018 MY4, 2018 MX4, 2018 MW4, 2018 MV4, 2018 MU4, 2018 ME5, 2018 MD5, 2018 MC5, 2018 MB5, 2018 MA5, 2018 LT5, 2018 LS15, 2018 LR3, 2018 LR15, 2018 LQ15, 2018 LM, 2001 RQ17
Z64El Miron del Cielo Obs. in Spain, 1 in MPEC 2018-M39 -- 1627
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2018-M42 -- 2018 LS15
595Farra d'Isonzo Obs. in Italy, 2 in MPEC 2018-M39 -- 2018 MK, 2018 LD3
W19Kalamazoo Obs. in Michigan, 2 in MPEC 2018-M39 -- 467309, 1627
K38M57 Obs. in Italy, 2 in MPEC 2018-M39 -- 66391, 467309
568^R. Wainscoat on Mauna Kea in Hawaii, 5 in MPECs 2018-M40, 2018-M41, 2018-M43, 2018-M44 & 2018-M45 -- 2018 MU4, 2018 LU15, 2018 LT15, 2018 LR15, 2018 LQ15
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2018-M39 -- 2018 GA5, 139345
G96Mt. Lemmon Survey (MLS) in Arizona, 16 in MPECs 2018-M39, 2018-M50 & 2018-M57 -- 2018 MG5, 2018 LX15, 2018 KM2, 2018 AP12, 2015 MR101, 2005 CS6, 65996, 518424, 506859, 445267, 31345, 302591, 25916, 253062, 220839, 2061
Z71Norba Caesarina Obs., 1 in MPEC 2018-M39 -- 1627
I41Palomar Transient Factory (PTF) in southern California, 5 in MPECs 2018-M37 & 2018-M39 -- 2018 LQ2, 2018 LM15, 2018 LF5, 2015 HF11, 474574
F51Pan-STARRS 1 (PS1) in Hawaii, 44 in MPECs 2018-M37, 2018-M38, 2018-M39, 2018-M40, 2018-M41, 2018-M42, 2018-M43, 2018-M44, 2018-M45, 2018-M46, 2018-M47, 2018-M48, 2018-M49, 2018-M51, 2018-M52, 2018-M53, 2018-M54, 2018-M55, 2018-M56 & 2018-M57 -- 2018 MY4, 2018 MX4, 2018 MW4, 2018 MV4, 2018 MU4, 2018 MG5, 2018 MF5, 2018 ME5, 2018 MD5, 2018 MC5, 2018 MB5, 2018 MA5, 2018 MA, 2018 LU15, 2018 LT15, 2018 LS15, 2018 LR15, 2018 LQ15, 2018 LM15, 2018 LL5, 2017 XH62, 2017 UY5, 2012 RS16, 2006 BH, 2005 UY5, 2002 UK11, 2001 RQ17, 96189, 87025, 86829, 508767, 471956, 436763, 366774, 302591, 18109, 178601, 17274, 162783, 100004, 7341, 5626, 5011, 2059
F52Pan-STARRS 2 (PS2) in Hawaii, 7 in MPECs 2018-M39 & 2018-M46 -- 2018 MV4, 68350, 455550, 338172, 154268, 153957, 719
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2018-M43 -- 2018 LT15
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-M57 -- 2018 MG5
204Schiaparelli Obs. in Italy, 2 in MPECs 2018-M49 & 2018-M57 -- 2018 MY4, 2018 MG5
W885M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2018-M39 -- 2018 LU3
Y00SONEAR in Brazil, 2 in MPEC 2018-M39 -- 2015 DP155, 68216
691Spacewatch 0.9m telescope in Arizona, 17 in MPEC 2018-M39 -- 2018 LU3, 2018 LS2, 2018 LQ6, 2018 LP2, 2018 LM5, 2018 LL5, 2018 LG, 2018 LC3, 2018 LC1, 2018 KM2, 2018 KG1, 2018 JQ1, 2017 QP17, 2007 NL1, 2007 LC15, 99799, 518424
291Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2018-M38, 2018-M39, 2018-M42, 2018-M45, 2018-M46, 2018-M47 & 2018-M48 -- 2018 MX4, 2018 MW4, 2018 MV4, 2018 MU4, 2018 LZ13, 2018 LV2, 2018 LS15, 2018 LR3, 2018 LM2, 2018 KP1, 2001 RQ17
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2018-M39 -- 154268
I52Steward Obs. Mt. Lemmon Station in Arizona, 25 in MPECs 2018-M39, 2018-M48, 2018-M49, 2018-M50, 2018-M51, 2018-M53, 2018-M56 & 2018-M57 -- 2018 MY4, 2018 MX4, 2018 MG5, 2018 MF5, 2018 MC5, 2018 MA5, 2018 LX5, 2018 LX15, 2018 LS3, 2018 LS2, 2018 LQ3, 2018 LQ2, 2018 LP2, 2018 LO5, 2018 LN4, 2018 LN2, 2018 LN, 2018 LG1, 2018 LG, 2018 LE4, 2018 LE3, 2018 LD3, 2018 LC1, 2018 KL2, 27346
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPEC 2018-M39 -- 2018 KU, 2018 KQ1, 2018 KP1, 495829
L01Visnjan Obs., 3 in MPECs 2018-M43, 2018-M50 & 2018-M57 -- 2018 MG5, 2018 LX15, 2018 LT15
C51WISE in Earth polar orbit, 3 in MPEC 2018-M39 -- 2001 SC170, 444193, 194126
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 June '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2031 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 LZ13JPL Sentry15002057-2116133.41797e-07-3.75-4.030JPL: Computed at 07:41 today Pacific time based on 21 observations spanning 3.8711 days (2018-Jun-15.52506 to 2018-Jun-19.39612). Diameter approximately 0.270 km. from weighted mean H=20.49.
NEODyS15002036-2113235.54e-07-3.38-3.690NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2018-06-15.526 to 2018-06-18.312."
2018 LT5JPL Sentry15002025-208351.270891e-07-6.76-6.870JPL: Computed at 07:39 today Pacific time based on 12 observations spanning 4.6471 days (2018-Jun-14.39564 to 2018-Jun-19.04275). Diameter approximately 0.034 km. from weighted mean H=24.99.
NEODyS15002025-2095151.49e-06-5.02-5.310NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2018-06-14.396 to 2018-06-17.184."
2018 LR3JPL Sentry15002077-211148.62144e-06-6.01-6.100JPL: Computed at 07:37 today Pacific time based on 37 observations spanning 8.8431 days (2018-Jun-10.32538 to 2018-Jun-19.1685). Diameter approximately 0.018 km. from weighted mean H=26.32.
NEODyS15002068-2117125.11e-06-6.31-6.490NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2018-06-10.326 to 2018-06-18.256."
2018 LMJPL Sentry15002111-211223.0288e-07-7.09-7.150JPL: Computed at 07:25 today Pacific time based on 88 observations spanning 14.768 days (2018-Jun-04.25437 to 2018-Jun-19.02212). Diameter approximately 0.031 km. from weighted mean H=25.21.

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 19 June '18

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

0042 6/20Grabbed MPEC 2018-M40 - 2018 LQ15 - see above
Grabbed MPEC 2018-M41 - 2018 LR15 - see above
Grabbed MPEC 2018-M42 - 2018 LS15 - see above
Grabbed MPEC 2018-M43 - 2018 LT15 - see above
Grabbed MPEC 2018-M44 - 2018 LU15 - see above
Grabbed MPEC 2018-M45 - 2018 MU4 - see above
Grabbed MPEC 2018-M46 - 2018 MV4 - see above
Grabbed MPEC 2018-M47 - 2018 MW4 - see above
Grabbed MPEC 2018-M48 - 2018 MX4 - see above
Grabbed MPEC 2018-M49 - 2018 MY4 - see above
Grabbed MPEC 2018-M50 - 2018 LX15 - see above
Grabbed MPEC 2018-M51 - 2018 MA5 - see above
Grabbed MPEC 2018-M52 - 2018 MB5 - see above
Grabbed MPEC 2018-M53 - 2018 MC5 - see above
Grabbed MPEC 2018-M54 - 2018 MD5 - see above
Grabbed MPEC 2018-M55 - 2018 ME5 - see above
Grabbed MPEC 2018-M56 - 2018 MF5 - see above
Grabbed MPEC 2018-M57 - 2018 MG5 - see above
1726Generated Traffic Report
1500Noted that JPL Sentry has updated its 2018 LM risk assessment - see above
Noted that JPL Sentry has updated its 2018 LR3 risk assessment - see above
Noted that NEODyS has updated its 2018 LR3 risk assessment - see above
Noted that JPL Sentry has updated its 2018 LT5 risk assessment - see above
Noted that NEODyS has posted 2018 LT5 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 LZ13 risk assessment - see above
Noted that NEODyS has posted 2018 LZ13 as an impact risk - see above
Grabbed MPEC 2018-M37 - 2018 LM15 - see above
Grabbed MPEC 2018-M38 - 2001 RQ17 - see above
Grabbed MPEC 2018-M39 - Daily Orbit Update - see above