Contents  on 20 May '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 20 May '18

Seven objects reported inside ten LD

Seven asteroidal objects are reported within ten lunar distances (LD) of Earth today. Nearest are newly announced risk-listed 2018 KF1, which enters Earth's sphere of gravitational influence, coming in from 3.46 to 2.35 LD, while 2018 KS is inbound from 4.25 to 2.87 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
2.05 LD May 22 2018 KS 9 m  2.87 from 4.25 LD May 16 - 27 NHATS target - DOU
2.16 LD May 13 2016 HP6 27 m  8.93 to 10.14 LD May 5 - 20 NHATS target, exits ten LD
2.24 LD tomorrow 2018 KF1 27 m  2.35 from 3.46 LD May 16 - 26 NEW, enters Earth SOI, risk - MPEC
4.43 LD May 13 2018 JA1 24 m  9.32 to 10.47 LD May 6 - 20 NHATS target, exits ten LD
5.29 LD today 2018 JG1 43 m  5.29 LD May 15 - 24 Earth closest at 0050 UTC, risk
7.56 LD May 16 2018 KU 18 m  9.71 to 10.92 LD May 12 - 20 exits ten LD - DOU
8.70 LD yesterday 2018 KQ 11 m  8.70 to 8.88 LD May 17 - 22

This report was updated at 2030 UTC with the discovery of inbound 2018 KF1 (MPEC). Your first neighboring asteroids traffic report was generated at 1812 UTC with follow-up in today's DOU MPEC for two objects in the above active traffic table and for three departed objects: 2018 JK2, 2018 JM, and risk-listed 2018 JN.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
9.50 LD May 29 68347 2001 KB67 371 m  26.21 from 29.07 LD May 28 - 30 radar target
5.56 LD June 10 2018 EJ4 186 m  29.14 from 30.45 LD June 4 - 16 radar/NHATS target
8.96 LD June 11 2015 DP155 162 m  22.26 from 23.09 LD June 6 - 15 NHATS target



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 20 May '18

The MPC's NEO Confirmation Page has 21 listings

When last checked at 2342 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 21 objects listed. Of these, six were "one nighters." So far The Tracking News has counted a total of 36 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 20 May '18

Minor Planet Electronic Circulars

As of last check at 2342 UTC, there have been nine MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-K47 - "18:24 UT" - 2018 KF1


MPEC 2018-K46 - "17:04 UT" - 2018 KE1


MPEC 2018-K45 - "17:00 UT" - 2018 KD1


MPEC 2018-K44 - "16:57 UT" - 2018 KC1


MPEC 2018-K43 - "16:53 UT" - 2018 KB1


MPEC 2018-K42 - "16:49 UT" - 2018 KA1


<< DOU on 20 May '18 >>  MPEC 2018-K41 - "12:05 UT" - Daily Orbit Update


MPEC 2018-K40 - "11:24 UT" - 2018 KV


MPEC 2018-K39 - "02:17 UT" - 2015 KJ19

Observers  on 20 May '18

A total of 34 observers appear in today's MPECs.

CodeObserver / observatory
T05ATLAS Haleakala in Hawaii, 13 in MPEC 2018-K41 -- 2018 HV2, 2009 SK104, 1999 LK1, 68348, 65674, 495615, 444193, 242708, 18882, 6456, 5646, 5604, 1685
T08ATLAS Mauna Loa in Hawaii, 12 in MPECs 2018-K41 & 2018-K47 -- 2018 KF1, 2018 JK3, 2013 QH10, 450648, 439313, 37655, 220839, 163243, 15745, 139289, 3122, 1627
160Castelmartini Obs. in Italy, 4 in MPECs 2018-K39, 2018-K41 & 2018-K47 -- 2018 KS, 2018 KF1, 2018 JE5, 2015 KJ19
703Catalina Sky Survey (CSS) in Arizona, 29 in MPECs 2018-K39, 2018-K40, 2018-K41 & 2018-K47 -- 2018 KV, 2018 KF1, 2018 JY1, 2018 JF2, 2018 JE1, 2017 WH14, 2017 VL15, 2016 JP, 2015 TX143, 2015 KJ19, 2013 QH10, 2001 SC170, 516454, 514652, 463664, 450648, 439313, 38091, 37655, 37336, 337084, 285339, 24761, 220839, 164201, 162269, 138937, 138847, 9856
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPECs 2018-K41, 2018-K42, 2018-K44, 2018-K45 & 2018-K46 -- 2018 KE1, 2018 KD1, 2018 KC1, 2018 KA1, 2018 JY2, 2018 JV2, 2018 JS2, 2018 JQ1, 2018 JJ3, 2017 RY15
K87Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2018-K40 -- 2018 KV
K83Forti Obs., 3 in MPEC 2018-K41 -- 450648, 138847, 136839
157Frasso Sabino Obs. in Italy, 1 in MPEC 2018-K41 -- 2018 GA5
K73Gravina Obs. in Italy, 2 in MPEC 2018-K41 -- 220839, 1627
J95Great Shefford Obs. in England, 3 in MPECs 2018-K41 & 2018-K47 -- 2018 KU, 2018 KS, 2018 KF1
A17Guidestar Obs. in Germany, 1 in MPEC 2018-K39 -- 2015 KJ19
P93JAXA Space Tracking & Communications Center (JAXA STCC) in Japan, 5 in MPECs 2018-K39, 2018-K40, 2018-K41 & 2018-K47 -- 2018 KV, 2018 KF1, 2015 KJ19, 25916, 138847
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2018-K40, 2018-K42, 2018-K44, 2018-K45 & 2018-K47 -- 2018 KV, 2018 KF1, 2018 KD1, 2018 KC1, 2018 KA1
900Moriyama Obs. in Japan, 1 in MPEC 2018-K47 -- 2018 KF1
474Mt. John Obs. in New Zealand, 5 in MPECs 2018-K41, 2018-K44, 2018-K45 & 2018-K46 -- 2018 KE1, 2018 KD1, 2018 KC1, 2018 FQ5, 1999 LK1
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2018-K41, 2018-K42, 2018-K43, 2018-K44, 2018-K45 & 2018-K46 -- 2018 KE1, 2018 KD1, 2018 KC1, 2018 KB1, 2018 KA1, 2018 JM1, 2018 GT1, 513182, 288807, 101873
J69North Obs. in England, 1 in MPEC 2018-K47 -- 2018 KF1
Z80Northolt Branch Obs. in England, 3 in MPECs 2018-K41 & 2018-K47 -- 2018 KF1, 25916, 220839
F51Pan-STARRS 1 (PS1) in Hawaii, 16 in MPECs 2018-K40, 2018-K41, 2018-K45 & 2018-K46 -- 2018 KV, 2018 KE1, 2018 KD1, 2018 CZ13, 2015 FP118, 2014 WG7, 2005 JD46, 2000 WK107, 507847, 505657, 288592, 17182, 164400, 154229, 101873, 4179
F52Pan-STARRS 2 (PS2) in Hawaii, 2 in MPEC 2018-K41 -- 438430, 138847
K63Pascoli Obs. in Italy, 2 in MPECs 2018-K40 & 2018-K47 -- 2018 KV, 2018 KF1
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-K47 -- 2018 KF1
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2018-K41 -- 2018 JF2
C95SATINO-1 in France, 1 in MPEC 2018-K47 -- 2018 KF1
204Schiaparelli Obs. in Italy, 1 in MPEC 2018-K41 -- 2018 GR2
033Schwarzschild Obs. in Germany, 2 in MPECs 2018-K40 & 2018-K41 -- 2018 KV, 2015 KJ19
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-K41 -- 2018 JS1
691Spacewatch 0.9m telescope in Arizona, 8 in MPEC 2018-K41 -- 2018 JO1, 2018 JC3, 2018 GL, 2018 EQ4, 2017 KU34, 2015 MB54, 2012 LF11, 2010 MS1
291Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2018-K41 -- 2018 JN, 2018 JK2, 2018 JC2, 2011 SR5
I52Steward Obs. Mt. Lemmon Station in Arizona, 20 in MPECs 2018-K39, 2018-K40, 2018-K41, 2018-K42, 2018-K43, 2018-K44, 2018-K45, 2018-K46 & 2018-K47 -- 2018 KV, 2018 KF1, 2018 KE1, 2018 KD1, 2018 KC1, 2018 KB1, 2018 KA1, 2018 JY1, 2018 JV2, 2018 JN1, 2018 JM, 2018 JL, 2018 JJ3, 2018 JG2, 2018 JF2, 2018 JF, 2018 JD2, 2018 GQ5, 2018 BY2, 2015 KJ19
673!Jana Pittichova Chesley via Table Mtn. Obs. in southern California, 1 in MPEC 2018-K45 -- 2018 KD1
L01Visnjan Obs., 3 in MPECs 2018-K40, 2018-K45 & 2018-K47 -- 2018 KV, 2018 KF1, 2018 KD1
718Wiggins Obs. in Utah, 1 in MPEC 2018-K47 -- 2018 KF1
C51WISE in Earth polar orbit, 3 in MPEC 2018-K41 -- 442742, 115052, 6569
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 May '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2342 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 KF1JPL Sentry19382101-210111.526e-06-6.37-6.370JPL: Computed at 12:27 today Pacific time based on 72 observations spanning 1.2899 days (2018-May-19.30836 to 2018-May-20.59826). Diameter approximately 0.027 km. from weighted mean H=25.49.
2018 JC2JPL Sentry16302050-205011.928e-07-5.51-5.510JPL: Computed at 07:15 today Pacific time based on 68 observations spanning 10.999 days (2018-May-09.32052 to 2018-May-20.31985). Diameter approximately 0.095 km. from weighted mean H=22.76.
NEODyS1630205012.07e-10-8.42-8.420NEODyS: "Based on 68 optical observations (of which 0 are rejected as outliers) from 2018-05-09.321 to 2018-05-20.321."
2018 JNJPL Sentry16302100-211229.947e-07-6.39-6.660JPL: Computed at 07:23 today Pacific time based on 123 observations spanning 15.040 days (2018-May-05.42349 to 2018-May-20.46343). Diameter approximately 0.033 km. from weighted mean H=25.04.
NEODyS16302088-211241.08e-06-6.34-6.370NEODyS: "Based on 123 optical observations (of which 1 are rejected as outliers) from 2018-05-05.424 to 2018-05-20.464."

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 20 May '18

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

2030Updated Traffic Report
1938Noted that JPL Sentry has posted 2018 KF1 as an impact risk - see above
1833Grabbed MPEC 2018-K47 - 2018 KF1 - see above
1801Grabbed MPEC 2018-K46 - 2018 KE1 - see above
1705Grabbed MPEC 2018-K42 - 2018 KA1 - see above
Grabbed MPEC 2018-K43 - 2018 KB1 - see above
Grabbed MPEC 2018-K44 - 2018 KC1 - see above
Grabbed MPEC 2018-K45 - 2018 KD1 - see above
1630Noted that JPL Sentry has updated its 2018 JC2 risk assessment - see above
Noted that NEODyS has updated its 2018 JC2 risk assessment - see above
Noted that JPL Sentry has updated its 2018 JN risk assessment - see above
Noted that NEODyS has updated its 2018 JN risk assessment - see above
Grabbed MPEC 2018-K40 - 2018 KV - see above
Grabbed MPEC 2018-K41 - Daily Orbit Update - see above
0330Grabbed MPEC 2018-K39 - 2015 KJ19 - see above