Contents  on 22 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 22 June '18

Four objects reported inside ten LD

There are four asteroidal objects reported within ten lunar distances (LD) of Earth today. Closest is 2018 LX5, which moves out from 5.26 to 6.17 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
5.22 LD yesterday 2018 LX5 30 m  5.26 to 6.17 LD June 18 - 24
6.02 LD June 29 2018 LR3 19 m  8.28 from 8.87 LD June 20 - July 8 NHATS target, risk - DOU
6.50 LD yesterday 2018 LS5 16 m  6.51 to 6.90 LD June 18 - 25 DOU
7.49 LD June 20 2018 MK 51 m  9.55 to 12.31 LD June 18 - 22 exits ten LD
Approaching
5.51 LD June 27 2018 MX4 15 m  10.17 from 11.72 LD tomorrow - July 2 risk

This report was generated at 1844 UTC with follow-up in today's DOU MPEC for inbound 2018 LR3, outbound 2018 LS5, departed objects 2018 MJ, 2018 LW3, 2018 LE1 (risk listed), 2015 DP155, and 68347 2001 KB67, and distant 450894 2008 BT18.


<< Reading:  Marco Langbroek notified the Minor Planet Mailing List (MPML) that he has posted an analysis of the June 16th fireball observed above northern Europe.



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 come within ten LD since A/CC began these traffic reports (2007) but is not currently 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 22 June '18

The MPC's NEO Confirmation Page has 38 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 38 objects listed. Of these, 21 were "one nighters." So far The Tracking News has counted a total of 47 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 22 June '18

Minor Planet Electronic Circulars

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


MPEC 2018-M84 - "23:19 UT" - 2018 MX6


MPEC 2018-M83 - "20:36 UT" - Comet P/2018 L4 (Panstarrs)


MPEC 2018-M82 - "18:01 UT" - 2014 YR43


MPEC 2018-M81 - "14:06 UT" - 2018 MW6


MPEC 2018-M80 - "13:59 UT" - 2018 LD16


MPEC 2018-M79 - "13:53 UT" - 2018 LC16


<< DOU on 22 June '18 >>  MPEC 2018-M78 - "12:04 UT" - Daily Orbit Update


MPEC 2018-M77 - "11:15 UT" - 2014 SO350

Observers  on 22 June '18

A total of 37 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 6 in MPEC 2018-M78 -- 2018 LN, 2018 KH, 2018 KD1, 2015 JP, 2002 LX, 341050
T05ATLAS Haleakala in Hawaii, 16 in MPEC 2018-M78 -- 2011 GA62, 2005 MF5, 99799, 302591, 25916, 220839, 154268, 153957, 139345, 13553, 7350, 2061, 1627, 1036, 887, 719
T08ATLAS Mauna Loa in Hawaii, 4 in MPEC 2018-M78 -- 467309, 278327, 138847, 1580
B96Brixiis Obs. in Belgium, 1 in MPEC 2018-M83 -- P/2018 L4
160Castelmartini Obs. in Italy, 4 in MPECs 2018-M78 & 2018-M84 -- 2018 MX6, 68347, 15745, 153957
703Catalina Sky Survey (CSS) in Arizona, 26 in MPECs 2018-M78, 2018-M83 & 2018-M84 -- 2018 MX6, 2018 LU3, P/2018 L4, 2015 TN237, 2012 UV27, 2005 MF5, 2002 OS4, 89959, 68347, 65996, 518640, 518635, 450894, 302591, 220839, 18882, 15745, 154268, 153957, 136849, 7350, 6569, 6456, 5626, 2061, 719
V06Catalina Sky Survey Kuiper Telescope in Arizona, 1 in MPEC 2018-M83 -- P/2018 L4
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2018-M78 & 2018-M80 -- 2018 LW3, 2018 LD16, 2018 KB4
A77Chante-Perdrix Obs. in France, 1 in MPEC 2018-M83 -- P/2018 L4
W847David Gerdes in Michigan via DECam in Chile, 1 in MPEC 2018-M77 -- 2014 SO350
J77Golden Hill Obs. in England, 2 in MPECs 2018-M81 & 2018-M84 -- 2018 MX6, 2018 MW6
J95Great Shefford Obs. in England, 2 in MPECs 2018-M81 & 2018-M84 -- 2018 MX6, 2018 MW6
A17Guidestar Obs. in Germany, 1 in MPEC 2018-M84 -- 2018 MX6
U695Hidetaka Sato in Japan via iTelescope Obs. Auberry in northern California, 1 in MPEC 2018-M83 -- P/2018 L4
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-M84 -- 2018 MX6
246KLENOT in the Czech Republic, 1 in MPEC 2018-M81 -- 2018 MW6
Z43Landehen Obs., 1 in MPEC 2018-M78 -- 139345
K38M57 Obs. in Italy, 1 in MPEC 2018-M84 -- 2018 MX6
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2018-M79, 2018-M81 & 2018-M84 -- 2018 MX6, 2018 MW6, 2018 LC16
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2018-M78 -- 397237
568^R. Wainscoat on Mauna Kea in Hawaii, 3 in MPECs 2018-M79, 2018-M80 & 2018-M83 -- 2018 LD16, 2018 LC16, P/2018 L4
711McDonald Obs. in Texas, 1 in MPEC 2018-M83 -- P/2018 L4
G96Mt. Lemmon Survey (MLS) in Arizona, 14 in MPECs 2018-M78, 2018-M81 & 2018-M83 -- 2018 MW6, 2018 LQ2, P/2018 L4, 2017 NK, 2015 QM3, 2011 KN9, 54686, 513550, 457212, 399611, 398188, 351331, 335746, 162980
0895N.V. Maigurova via Nikolaev Obs. in Ukraine, 5 in MPEC 2018-M78 -- 2017 YE5, 2015 DP155, 2011 GA62, 467309, 139345
J69North Obs. in England, 1 in MPEC 2018-M78 -- 2018 LT6
C23Olmen Obs. in Belgium, 2 in MPEC 2018-M78 -- 66391, 1627
I41Palomar Transient Factory (PTF) in southern California, 3 in MPECs 2018-M78 & 2018-M83 -- P/2018 L4, 504711, 455550
F51Pan-STARRS 1 (PS1) in Hawaii, 16 in MPECs 2018-M78, 2018-M79, 2018-M80 & 2018-M83 -- 2018 LD16, 2018 LC16, P/2018 L4, 2005 UY5, 2005 KP9, 2002 UK11, 2002 NE71, 96189, 89959, 518640, 506859, 495829, 455213, 154268, 139345, 719
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2018-M83 -- P/2018 L4
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-M78 -- 2018 LD3
587Sormano Obs. in Italy, 1 in MPEC 2018-M83 -- P/2018 L4
691Spacewatch 0.9m telescope in Arizona, 14 in MPECs 2018-M78, 2018-M80, 2018-M81 & 2018-M83 -- 2018 MW6, 2018 MR5, 2018 LU3, 2018 LP5, 2018 LO5, 2018 LE3, 2018 LD16, 2018 LC1, P/2018 L4, 2018 JD5, 2017 QP17, 2015 MQ101, 2014 NE3, 3352
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2018-M78, 2018-M79 & 2018-M83 -- 2018 MY4, 2018 LL2, 2018 LG5, 2018 LC16, P/2018 L4, 2018 KM2, 2018 JQ1
I52Steward Obs. Mt. Lemmon Station in Arizona, 26 in MPECs 2018-M78, 2018-M81, 2018-M83 & 2018-M84 -- 2018 MY4, 2018 MX6, 2018 MW6, 2018 MS6, 2018 MR5, 2018 MQ5, 2018 MP5, 2018 MJ5, 2018 MJ, 2018 MH5, 2018 MG5, 2018 MC5, 2018 LW5, 2018 LS5, 2018 LR6, 2018 LR3, 2018 LQ3, 2018 LO5, 2018 LN4, 2018 LN2, 2018 LG5, 2018 LE3, P/2018 L4, 2018 JJ2, 2018 JD2, 2013 PW6
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPECs 2018-M78 & 2018-M82 -- 2018 MR5, 2018 MC5, 2018 LE1, 2014 YR43
L01Visnjan Obs., 2 in MPECs 2018-M81 & 2018-M83 -- 2018 MW6, P/2018 L4
E08Wobblesock Obs. in New South Wales, 1 in MPEC 2018-M78 -- 2018 LD3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 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 MW6JPL Sentry16002038-204924.4242e-09-5.41-5.470JPL: Computed at 08:24 today Pacific time based on 39 observations spanning 2.9878 days (2018-Jun-19.26519 to 2018-Jun-22.25296). Diameter approximately 0.389 km. from weighted mean H=19.70.
2018 MR5NEODyS1600R E M O V E D-
2018 MC5JPL Sentry16002073-211373.3928299e-06-5.91-6.400JPL: Computed at 07:47 today Pacific time based on 30 observations spanning 9.8856 days (2018-Jun-12.475331 to 2018-Jun-22.36093). Diameter approximately 0.031 km. from weighted mean H=25.20.
2018 LS5JPL Sentry1600R E M O V E DJPL: Risk listing removed at 1443 UTC today
2018 LR3JPL Sentry16002077-211769.708888e-06-5.90-5.990JPL: Computed at 07:34 today Pacific time based on 45 observations spanning 11.844 days (2018-Jun-10.32538 to 2018-Jun-22.16952). Diameter approximately 0.019 km. from weighted mean H=26.22.
2018 LE1JPL Sentry16002102-210211.988e-07-8.40-8.400JPL: Computed at 07:33 today Pacific time based on 51 observations spanning 15.991 days (2018-Jun-05.39422 to 2018-Jun-21.385419). Diameter approximately 0.010 km. from weighted mean H=27.70.

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 22 June '18

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

2330Grabbed MPEC 2018-M84 - 2018 MX6 - see above
2101Grabbed MPEC 2018-M83 - Comet P/2018 L4 (Panstarrs) - see above
1844Generated Traffic Report
1830Grabbed MPEC 2018-M82 - 2014 YR43 - see above
1600Noted that JPL Sentry has updated its 2018 LE1 risk assessment - see above
Noted that JPL Sentry has updated its 2018 LR3 risk assessment - see above
Noted that JPL Sentry has removed 2018 LS5 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 MC5 risk assessment - see above
Noted that NEODyS has removed 2018 MR5 as an impact risk - see above
Noted that JPL Sentry has posted 2018 MW6 as an impact risk - see above
Grabbed MPEC 2018-M77 - 2014 SO350 - see above
Grabbed MPEC 2018-M78 - Daily Orbit Update - see above
Grabbed MPEC 2018-M79 - 2018 LC16 - see above
Grabbed MPEC 2018-M80 - 2018 LD16 - see above
Grabbed MPEC 2018-M81 - 2018 MW6 - see above