Contents  on 12 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 12 June '18

Five objects reported inside ten LD

There are five small celestial bodies reported within ten lunar distances (LD) of our planet today. Nearest is risk-listed 2018 LD1, which is inbound from 6.74 to 4.38 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
0.9   LD June 15* 2018 LV3 17 m  5.3 from 7.8 LD yesterday - June 19 NEW, EPU +/- 7 mins.*, intruder - MPEC
1.57 LD June 14 2018 LD1 18 m  4.38 from 6.74 LD June 10 - 18 risk - DOU
3.93 LD June 9 2018 LR2 25 m  5.93 to 7.73 LD June 5 - 14 risk - DOU
5.56 LD June 10 2018 EJ4 186 m  5.80 to 6.34 LD June 4 - 16 radar/NHATS target - DOU
8.96 LD yesterday 2015 DP155 162 m  8.99 to 9.13 LD June 6 - 15 NHATS target - DOU
Approaching (sorted by 10-LD bubble entry date)
7.62 LD June 15 2018 LK 152 m  11.02 from 13.18 LD tomorrow - June 18 DOU
6.0   LD June 29* 2018 LR3 19 m  15.3 from 16.0 LD June 20 - July 8 NEW, EPU +/- 50 mins.*, risk - MPEC
* EPU = Earth passage uncertainty

This report was generated at 2056 UTC with the discoveries of inbound intruder 2018 LV3 (MPEC) and approaching risk-listed 2018 LR3 (MPEC), and with the recovery of distant 2016 LB in today's DOU MPEC, which also has follow-up for five objects in the above active traffic table plus four departed objects: 2018 LU2, 68347 2001 KB67, and risk-listed 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. 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 12 June '18

The MPC's NEO Confirmation Page has 41 listings

When last checked at 2330 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 41 objects listed. Of these, 21 were "one nighters." So far The Tracking News has counted a total of 59 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 12 June '18

Minor Planet Electronic Circulars

As of last check at 2330 UTC, there have been ten MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-L63 - "14:04 UT" - 2018 LT3


MPEC 2018-L62 - "13:59 UT" - 2018 LR3


MPEC 2018-L61 - "13:55 UT" - 2018 LQ3


MPEC 2018-L60 - "13:50 UT" - 2018 LP3


MPEC 2018-L59 - "13:42 UT" - 2018 LV3


MPEC 2018-L58 - "13:38 UT" - 2018 LU3


MPEC 2018-L57 - "13:33 UT" - 2018 LS3


MPEC 2018-L56 - "13:28 UT" - 2018 LO3


<< DOU on 12 June '18 >>  MPEC 2018-L55 - "12:03 UT" - Daily Orbit Update


MPEC 2018-L54 - "01:18 UT" - 2005 MF5

Observers  on 12 June '18

A total of 39 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2018-L58 -- 2018 LU3
T05ATLAS Haleakala in Hawaii, 7 in MPEC 2018-L55 -- 66391, 278327, 139289, 138847, 9856, 1866, 1580
T08ATLAS Mauna Loa in Hawaii, 10 in MPECs 2018-L55 & 2018-L61 -- 2018 LQ3, 2018 JC3, 495615, 467309, 408752, 25916, 220839, 139345, 13553, 719
W96Campo Catino Austral Obs. in Chile, 1 in MPEC 2018-L55 -- 3552
703Catalina Sky Survey (CSS) in Arizona, 21 in MPECs 2018-L55, 2018-L58 & 2018-L61 -- 2018 LU3, 2018 LQ3, 2018 JE1, 2015 FP118, 85628, 65996, 518469, 518463, 511523, 495615, 475967, 36183, 25916, 220839, 162168, 152637, 100085, 6569, 5626, 5604, 1685
G58Chabot Obs. in northern California, 3 in MPECs 2018-L55 & 2018-L59 -- 2018 LV3, 2018 LN2, 2018 KL2
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 5 in MPECs 2018-L55, 2018-L61 & 2018-L62 -- 2018 LR3, 2018 LQ3, 2018 LM, 2018 LD1, 2018 LB1
157Frasso Sabino Obs. in Italy, 1 in MPEC 2018-L55 -- 1999 LW1
J77Golden Hill Obs. in England, 1 in MPEC 2018-L61 -- 2018 LQ3
J95Great Shefford Obs. in England, 3 in MPECs 2018-L60, 2018-L61 & 2018-L63 -- 2018 LT3, 2018 LQ3, 2018 LP3
G48Harlingten Research Obs. in New Mexico, 1 in MPEC 2018-L61 -- 2018 LQ3
H06#M. Suzuki in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-L61 -- 2018 LQ3
Q628N. Falla in England via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-L55 -- 96189
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-L61 -- 2018 LQ3
U68JPL SynTrack Robotic Telescope, 1 in MPEC 2018-L55 -- 212359
568^R. Wainscoat on Mauna Kea in Hawaii, 2 in MPECs 2018-L56 & 2018-L62 -- 2018 LR3, 2018 LO3
711McDonald Obs. in Texas, 2 in MPECs 2018-L61 & 2018-L63 -- 2018 LT3, 2018 LQ3
900Moriyama Obs. in Japan, 1 in MPEC 2018-L61 -- 2018 LQ3
G96Mt. Lemmon Survey (MLS) in Arizona, 20 in MPECs 2018-L54, 2018-L55, 2018-L56 & 2018-L60 -- 2018 LP3, 2018 LO3, 2018 LC, 2018 KL2, 2018 JE5, 2018 JD2, 2013 QH10, 2012 FN62, 2005 MF5, 522684, 513171, 484795, 438430, 38091, 367390, 333578, 276392, 243566, 11500, 4596
0895N.V. Maigurova via Nikolaev Obs. in Ukraine, 5 in MPEC 2018-L55 -- 2018 EJ4, 2015 DP155, 68347, 162168, 139345
J69North Obs. in England, 2 in MPECs 2018-L55 & 2018-L61 -- 2018 LQ3, 2018 LK
Z80Northolt Branch Obs. in England, 2 in MPECs 2018-L55 & 2018-L61 -- 2018 LQ3, 2015 DP155
I41Palomar Transient Factory (PTF) in southern California, 4 in MPEC 2018-L55 -- 86067, 66251, 504711, 138847
F51Pan-STARRS 1 (PS1) in Hawaii, 11 in MPECs 2018-L55, 2018-L56, 2018-L57, 2018-L58, 2018-L60, 2018-L62 & 2018-L63 -- 2018 LU3, 2018 LT3, 2018 LS3, 2018 LR3, 2018 LP3, 2018 LO3, 2018 KR2, 2012 PG6, 85713, 404108, 190161
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2018-L59 -- 2018 LV3
W71Rand II Obs. in New York, 1 in MPEC 2018-L61 -- 2018 LQ3
H36Sandlot Obs. in Kansas, 1 in MPEC 2018-L63 -- 2018 LT3
G40*program code "*" (19) via Slooh.com Canary Islands Obs. in the Canary Islands, 4 in MPEC 2018-L55 -- 2018 LK, 2018 JE5, 2018 EJ4, 153957
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-L61 -- 2018 LQ3
W88#program code "#" (12) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2018-L55 -- 2018 FQ5
Y00SONEAR in Brazil, 1 in MPEC 2018-L61 -- 2018 LQ3
587Sormano Obs. in Italy, 1 in MPEC 2018-L55 -- 2018 LR2
691Spacewatch 0.9m telescope in Arizona, 9 in MPECs 2018-L55 & 2018-L62 -- 2018 LR3, 2018 LJ1, 2018 LH1, 2018 LE1, 2018 LB1, 2018 KL, 2018 JS2, 2018 EQ4, 2012 MR4
291Spacewatch 1.8m telescope in Arizona, 12 in MPECs 2018-L55, 2018-L56 & 2018-L57 -- 2018 LS3, 2018 LO3, 2018 LC, 2018 KP1, 2018 KD1, 2018 KC2, 2018 JP1, 2018 JG2, 2018 EE4, 2017 KD5, 2016 LB, 2015 AM45
I52Steward Obs. Mt. Lemmon Station in Arizona, 18 in MPECs 2018-L54, 2018-L55, 2018-L56, 2018-L57, 2018-L58, 2018-L59, 2018-L60, 2018-L61, 2018-L62 & 2018-L63 -- 2018 LV3, 2018 LU3, 2018 LU2, 2018 LT3, 2018 LS3, 2018 LS2, 2018 LR3, 2018 LQ3, 2018 LP3, 2018 LO3, 2018 LN, 2018 LG1, 2018 LF3, 2018 LF1, 2018 LE3, 2018 LC1, 2017 WC29, 2005 MF5
L01Visnjan Obs., 4 in MPECs 2018-L54, 2018-L60, 2018-L61 & 2018-L63 -- 2018 LT3, 2018 LQ3, 2018 LP3, 2005 MF5
718Wiggins Obs. in Utah, 1 in MPEC 2018-L61 -- 2018 LQ3
C51WISE in Earth polar orbit, 3 in MPEC 2018-L55 -- 2004 LH, 415029, 5604
I15Wishing Star Obs. in Rhode Island, 3 in MPEC 2018-L55 -- 2018 KC3, 66391, 138847
E08Wobblesock Obs. in New South Wales, 6 in MPECs 2018-L55, 2018-L58, 2018-L59 & 2018-L61 -- 2018 LV3, 2018 LU3, 2018 LQ3, 2018 KB4, 2018 JE1, 2018 JC3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 June '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2330 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 LR3JPL Sentry15302059-2117254.2268011e-06-6.35-6.720JPL: Computed at 08:02 today Pacific time based on 15 observations spanning 1.8578 days (2018-Jun-10.32538 to 2018-Jun-12.18314). Diameter approximately 0.019 km. from weighted mean H=26.24.
2018 LR2NEODyS1530211815.95e-10-9.92-9.92n/aNEODyS: "Based on 36 optical observations (of which 1 are rejected as outliers) from 2018-06-08.372 to 2018-06-11.052."
2018 LE1JPL Sentry15302098-210331.8964465e-06-7.40-7.410JPL: Computed at 07:42 today Pacific time based on 42 observations spanning 6.9049 days (2018-Jun-05.39422 to 2018-Jun-12.29911). Diameter approximately 0.010 km. from weighted mean H=27.66.
NEODyS15302066-210363.01e-06-7.21-7.220NEODyS: "Based on 40 optical observations (of which 1 are rejected as outliers) from 2018-06-05.395 to 2018-06-11.283."
2018 LD1JPL Sentry15302116-211616.888e-08-8.14-8.140JPL: Computed at 07:39 today Pacific time based on 39 observations spanning 6.7275 days (2018-Jun-05.34064 to 2018-Jun-12.068188). Diameter approximately 0.018 km. from weighted mean H=26.36.
NEODyS15302106-211627.15e-08-8.14-8.160NEODyS: "Based on 36 optical observations (of which 0 are rejected as outliers) from 2018-06-05.341 to 2018-06-11.266."
2018 LB1JPL Sentry16062032-207333.527076e-05-1.58-1.581JPL #2 for the day: Computed at 07:34 today Pacific time based on 45 observations spanning 23.805 days (2018-May-19.425541 to 2018-Jun-12.23056). Diameter approximately 0.340 km. from weighted mean H=20.02.
NEODyS16062032-208152.43e-05-1.79-1.791NEODyS #2 for the day: "Based on 45 optical observations (of which 0 are rejected as outliers) from 2018-05-19.426 to 2018-06-12.231."
2018 LMJPL Sentry15302112-211212.318e-07-7.18-7.180JPL: Computed at 07:42 today Pacific time based on 74 observations spanning 7.6502 days (2018-Jun-04.25437 to 2018-Jun-11.904532). Diameter approximately 0.032 km. from weighted mean H=25.15.
2017 KB3NEODyS15302084-2117131.08e-07-7.32-7.790NEODyS: "Based on 46 optical observations (of which 0 are rejected as outliers) from 2017-05-17.219 to 2017-05-30.379."

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 12 June '18

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

2056Generated Traffic Report
1606Noted that JPL Sentry has updated its 2018 LB1 risk assessment - see above
Noted that NEODyS has updated its 2018 LB1 risk assessment - see above
1530Noted that NEODyS has updated its 2017 KB3 risk assessment - see above
Noted that JPL Sentry has updated its 2018 LB1 risk assessment - see above
Noted that NEODyS has updated its 2018 LB1 risk assessment - see above
Noted that JPL Sentry has updated its 2018 LD1 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 posted 2018 LR2 as an impact risk - see above
Noted that JPL Sentry has posted 2018 LR3 as an impact risk - see above
Grabbed MPEC 2018-L55 - Daily Orbit Update - see above
Grabbed MPEC 2018-L56 - 2018 LO3 - see above
Grabbed MPEC 2018-L57 - 2018 LS3 - see above
Grabbed MPEC 2018-L58 - 2018 LU3 - see above
Grabbed MPEC 2018-L59 - 2018 LV3 - see above
Grabbed MPEC 2018-L60 - 2018 LP3 - see above
Grabbed MPEC 2018-L61 - 2018 LQ3 - see above
Grabbed MPEC 2018-L62 - 2018 LR3 - see above
Grabbed MPEC 2018-L63 - 2018 LT3 - see above
0311Grabbed MPEC 2018-L54 - 2005 MF5 - see above