Contents  on 13 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 13 May '18

Ten objects reported inside ten LD

Today there are ten transient natural objects reported within ten lunar distances (LD) of our planet. The nearest is inside Earth's sphere of gravitational influence. 2016 HP6 comes its closest to us this time around, reaching 2.16 LD at 0104 UTC, and its closest to the Moon -- 2.94 LD at 0813 UTC.

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
0.53 LD May 15 2010 WC9 68 m  5.50 from 8.34 LD yesterday - May 19 intruder - DOU
2.08 LD May 9 2018 JP 11 m  6.07 to 7.63 LD May 3 - 15 NHATS target
2.16 LD today 2016 HP6 27 m  2.16 LD May 5 - 20 NHATS target, Earth closest at 0104 UTC, Moon
closest 2.94 LD at 0813 UTC - DOU
3.88 LD May 16 2018 JX 73 m  7.76 from 10.40 LD today - May 19 enters ten LD - DOU
4.33 LD May 11 2018 JZ 13 m  6.48 to 8.92 LD May 8 - 14
4.43 LD today 2018 JA1 27 m  4.43 LD May 6 - 20 NHATS target, Earth closest at 1607 UTC - DOU
6.48 LD May 9 388945 2008 TZ3 282 m  9.71 to 11.29 LD May 5 - 13 exits ten LD - DOU
7.44 LD tomorrow 2018 JL1 16 m  7.44 from 7.59 LD May 8 - 19 NHATS target, risk - DOU
8.78 LD tomorrow 2018 JY 50 m  8.93 from 9.64 LD yesterday - May 16 DOU
9.32 LD May 15 2018 JX1 18 m  9.63 from 10.21 LD today - May 17 enters ten LD

This report was generated at 2110 UTC with today's DOU MPEC posting first follow-up for inbound 2018 JY and, from April 25th, for now departed 2018 HS, along with continuing follow-up for approaching objects 2018 EJ4, 2015 DP155, and risk-listed 2018 JG1, for passing objects 2018 JA1 and 2016 HP6, for inbound objects 2018 JX, risk-listed 2018 JL1, and intruder 2010 WC9, for outbound 388945 2008 TZ3, and for departed objects 2018 JW and 2018 JM.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
5.30 LD May 20 2018 JG1 41 m  12.37 from 14.06 LD May 15 - 24 risk - DOU
9.50 LD May 29 68347 2001 KB67 371 m  46.94 from 50.01 LD May 28 - 30 radar target
5.56 LD June 10 2018 EJ4 186 m  38.28 from 39.57 LD June 4 - 16 radar/NHATS target - DOU
8.96 LD June 11 2015 DP155 162 m  28.04 from 28.86 LD June 6 - 15 NHATS target - DOU



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 13 May '18

The MPC's NEO Confirmation Page has 27 listings

When last checked at 2349 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 27 objects listed. Of these, fourteen were "one nighters." So far The Tracking News has counted a total of 28 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 13 May '18

Minor Planet Electronic Circulars

As of last check at 2349 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 13 May '18 >>  MPEC 2018-J75 - "12:05 UT" - Daily Orbit Update

Observers  on 13 May '18

A total of 23 observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 8 in MPEC 2018-J75 -- 2018 GB4, 2018 FP3, 2018 FF1, 2018 FD3, 2018 EE4, 2017 SB14, 2010 CF19, 66253
T05ATLAS Haleakala in Hawaii, 15 in MPEC 2018-J75 -- 2018 JY, 2018 FQ5, 2009 SK104, 88254, 68348, 444935, 444193, 242643, 141531, 6456, 5646, 5604, 4197, 1916, 1685
T08ATLAS Mauna Loa in Hawaii, 5 in MPEC 2018-J75 -- 2018 EJ4, 164201, 152931, 3752, 1866
160Castelmartini Obs. in Italy, 6 in MPEC 2018-J75 -- 212359, 184990, 15745, 14402, 115052, 6569
703Catalina Sky Survey (CSS) in Arizona, 20 in MPEC 2018-J75 -- 2018 JQ1, 2018 JA, 2018 EJ4, 2015 FP118, 2015 DP155, 85628, 85490, 68348, 65674, 54401, 516976, 513497, 36183, 242643, 186822, 154656, 141531, 112985, 6569, 4581
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 21 in MPEC 2018-J75 -- 2018 HT1, 2018 HS, 2018 HC, 2018 GZ4, 2018 GZ3, 2018 GY4, 2018 GW, 2018 GV5, 2018 GP5, 2018 GM2, 2018 GM1, 2018 GK2, 2018 GK1, 2018 GH2, 2018 GE5, 2018 GD3, 2018 FY1, 2018 FF2, 2017 YF7, 2017 YF5, 2016 JN
K87Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2018-J75 -- 2018 JF2
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2018-J75 -- 2014 WG7
595Farra d'Isonzo Obs. in Italy, 4 in MPEC 2018-J75 -- 2018 JX, 2018 JK, 2018 JA1, 2018 GL1
W46Foxfire Village Obs., 1 in MPEC 2018-J75 -- 5604
Q622Marian Urbanik in Slovakia via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-J75 -- 2010 WC9
046Klet Obs. in the Czech Republic, 8 in MPEC 2018-J75 -- 2018 FQ5, 2018 DX3, 2018 BY2, 2009 SK104, 85628, 388945, 194126, 1627
Z43Landehen Obs., 2 in MPEC 2018-J75 -- 2016 HP6, 138847
474Mt. John Obs. in New Zealand, 3 in MPEC 2018-J75 -- 2018 JC, 2017 XB2, 2016 HP6
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPEC 2018-J75 -- 2018 JL, 2018 HV2, 2014 OA2, 2008 VN, 2005 YW93, 68950, 66251, 516803, 333888, 31346, 214088, 159635
0895N.V. Maigurova via Nikolaev Obs. in Ukraine, 4 in MPEC 2018-J75 -- 2016 JP, 388945, 242643, 212359
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2018-J75 -- 2018 JF2
C23Olmen Obs. in Belgium, 1 in MPEC 2018-J75 -- 1627
D29Purple Mtn. Obs. Xuyi Station in China, 8 in MPEC 2018-J75 -- 2015 FP118, 85628, 508796, 467309, 36183, 159533, 152770, 5626
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-J75 -- 2018 HV2
G40(program code "(" (17) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-J75 -- 2018 JD2
Y00SONEAR in Brazil, 1 in MPEC 2018-J75 -- 5646
I52Steward Obs. Mt. Lemmon Station in Arizona, 26 in MPEC 2018-J75 -- 2018 JX, 2018 JW, 2018 JS1, 2018 JQ1, 2018 JP1, 2018 JO1, 2018 JO, 2018 JN1, 2018 JM1, 2018 JM, 2018 JL1, 2018 JL, 2018 JK1, 2018 JK, 2018 JJ1, 2018 JG1, 2018 JF, 2018 JE1, 2018 JA1, 2018 GT1, 2018 GQ5, 2018 GL1, 2018 GL, 2018 GA5, 2018 AL13, 2012 LF11
718Wiggins Obs. in Utah, 1 in MPEC 2018-J75 -- 2010 WC9
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 May '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2349 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 JC2NEODyS15382050-2115112.17e-07-5.32-5.330NEODyS: "Based on 36 optical observations (of which 0 are rejected as outliers) from 2018-05-09.321 to 2018-05-12.237."
2018 JZ1NEODyS1538205711.18e-08-7.24-7.240NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2018-05-09.272 to 2018-05-12.156."
2018 JL1JPL Sentry15382112-211426.567e-08-8.43-8.550JPL: Computed at 07:39 today Pacific time based on 39 observations spanning 4.8807 days (2018-May-08.26382 to 2018-May-13.14454). Diameter approximately 0.016 km. from weighted mean H=26.67.
2018 JG1JPL Sentry15382103-210311.382e-09-8.98-8.980JPL: Computed at 07:35 today Pacific time based on 57 observations spanning 5.0659 days (2018-May-08.17968 to 2018-May-13.24555). Diameter approximately 0.041 km. from weighted mean H=24.57.

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 13 May '18

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

2110Generated Traffic Report
1538Noted that NEODyS has posted 2018 JC2 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 JG1 risk assessment - see above
Noted that JPL Sentry has updated its 2018 JL1 risk assessment - see above
Noted that NEODyS has posted 2018 JZ1 as an impact risk - see above
Grabbed MPEC 2018-J75 - Daily Orbit Update - see above