Contents  on 17 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 17 May '18

Eight objects reported inside ten LD

Eight minor objects are reported within ten lunar distances (LD) of our home world today. Nearest is intruder 2010 WC9, which heads out from 3.13 to 5.95 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
0.53 LD May 15 2010 WC9 68 m  3.13 to 5.95 LD May 12 - 19 intruder - DOU
2.16 LD May 13 2016 HP6 27 m  5.40 to 6.56 LD May 5 - 20 NHATS target
3.06 LD May 13 2018 KC 11 m  8.49 to 10.68 LD May 9 - 17 NEW, exits ten LD - MPEC
3.88 LD yesterday 2018 JX 70 m  4.38 to 6.30 LD May 13 - 19 DOU
4.43 LD May 13 2018 JA1 24 m  6.19 to 7.16 LD May 6 - 20 NHATS target
5.29 LD May 20 2018 JG1 42 m  6.50 from 7.72 LD May 15 - 24 risk - DOU
7.43 LD May 14 2018 JL1 16 m  8.23 to 8.85 LD May 8 - 19 NHATS target, risk
9.33 LD May 15 2018 JX1 17 m  9.75 to 10.39 LD May 13 - 17 exits ten LD

This report was generated at 1940 UTC with the discovery of outbound 2018 KC (MPEC) and with today's DOU MPEC posting additional observation of departed 2018 JG3 and follow-up for five objects in the active traffic tables here, as well as for four more that have departed: 2018 JR1, 2018 JY, 2014 JR25, and risk-listed 2018 JN, plus distant 2002 JR100.

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  34.90 from 37.87 LD May 28 - 30 radar target
5.56 LD June 10 2018 EJ4 186 m  33.07 from 34.38 LD June 4 - 16 radar/NHATS target - DOU
8.96 LD June 11 2015 DP155 162 m  24.75 from 25.58 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. "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 now 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 17 May '18

The MPC's NEO Confirmation Page has 32 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 32 objects listed. Of these, seventeen were "one nighters." So far The Tracking News has counted a total of 38 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 17 May '18

Minor Planet Electronic Circulars

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


MPEC 2018-K13 - "21:45 UT" - 2010 OA


MPEC 2018-K12 - "21:43 UT" - 2009 QJ9


MPEC 2018-K11 - "21:41 UT" - 2017 KD3


MPEC 2018-K10 - "21:39 UT" - 2011 HS60


MPEC 2018-K09 - "21:37 UT" - 2008 JN


<< DOU on 17 May '18 >>  MPEC 2018-K08 - "12:06 UT" - Daily Orbit Update


MPEC 2018-K07 - "10:31 UT" - 2018 JK3


MPEC 2018-K06 - "10:28 UT" - 2018 HT3


MPEC 2018-K05 - "10:25 UT" - 2018 KC


MPEC 2018-K04 - "10:22 UT" - 2018 JJ3


MPEC 2018-K03 - "10:19 UT" - 2018 JH3

Observers  on 17 May '18

A total of 24 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPEC 2018-K08 -- 2018 JW1, 2018 JR1, 2018 GM4, 2017 MT8, 2006 EE1, 515639, 497113
T05ATLAS Haleakala in Hawaii, 10 in MPEC 2018-K08 -- 2018 JQ1, 85628, 516976, 508796, 475967, 36183, 25916, 242643, 13553, 719
T08ATLAS Mauna Loa in Hawaii, 9 in MPEC 2018-K08 -- 2018 EJ4, 2015 DP155, 85989, 220839, 152931, 138847, 9856, 3752, 1866
K46Bamberg Obs. in Germany, 1 in MPEC 2018-K08 -- 1627
703Catalina Sky Survey (CSS) in Arizona, 23 in MPEC 2018-K08 -- 2018 JQ1, 2018 HV2, 2016 CX264, 90367, 87311, 85628, 85490, 68348, 65674, 513497, 511523, 424482, 374851, 36183, 242643, 186822, 172034, 159533, 152770, 11500, 6569, 5626, 5604
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 15 in MPECs 2018-K04, 2018-K06, 2018-K08 & 2018-K10 -- 2018 JS2, 2018 JN1, 2018 JJ3, 2018 JE, 2018 HT3, 2018 HR3, 2018 HH, 2018 GY4, 2018 GV5, 2018 GS4, 2018 FY1, 2017 YF5, 2017 VX1, 2015 JY1, 2011 HS60
G26Fushan Obs. in China, 1 in MPEC 2018-K08 -- 1627
J95Great Shefford Obs. in England, 3 in MPECs 2018-K04, 2018-K05 & 2018-K08 -- 2018 KC, 2018 JY, 2018 JJ3
Z43Landehen Obs., 4 in MPEC 2018-K08 -- 2018 JX, 2010 WC9, 25916, 138847
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2018-K03, 2018-K04, 2018-K05, 2018-K07 & 2018-K09 -- 2018 KC, 2018 JK3, 2018 JJ3, 2018 JH3, 2008 JN
G96Mt. Lemmon Survey (MLS) in Arizona, 28 in MPECs 2018-K03, 2018-K04, 2018-K05, 2018-K07, 2018-K08 & 2018-K09 -- 2018 KC, 2018 JV2, 2018 JL, 2018 JK3, 2018 JJ3, 2018 JH3, 2018 GR5, 2018 GQ2, 2017 SE19, 2014 JR25, 2010 DM, 2008 KZ5, 2008 JN, 2008 HO3, 85628, 516976, 515446, 511523, 508796, 503861, 350462, 24445, 186822, 159533, 152941, 152679, 6569, 4581
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 2 in MPECs 2018-K07 & 2018-K08 -- 2018 JK3, 2018 JG3
H36Sandlot Obs. in Kansas, 1 in MPEC 2018-K05 -- 2018 KC
033Schwarzschild Obs. in Germany, 1 in MPEC 2018-K09 -- 2008 JN
G40(program code "(" (17) via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPECs 2018-K03 & 2018-K07 -- 2018 JK3, 2018 JH3
Y00SONEAR in Brazil, 2 in MPEC 2018-K08 -- 2018 JX, 5646
691Spacewatch 0.9m telescope in Arizona, 10 in MPEC 2018-K08 -- 2018 JF, 2018 GX4, 2018 GQ2, 2018 FS1, 2018 FO5, 2018 FJ4, 2015 XK1, 2015 BG311, 2002 JR100, 2000 WK107
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2018-K08 & 2018-K11 -- 2018 JZ1, 2018 JK1, 2018 HU1, 2017 KD3, 2015 UC67, 2014 QP266, 2008 UZ94, 2004 TP1, 2001 OD3
I52Steward Obs. Mt. Lemmon Station in Arizona, 20 in MPECs 2018-K03, 2018-K04, 2018-K05, 2018-K07, 2018-K08, 2018-K09 & 2018-K11 -- 2018 KC, 2018 JY2, 2018 JY1, 2018 JN1, 2018 JM1, 2018 JL2, 2018 JK3, 2018 JK, 2018 JJ3, 2018 JJ2, 2018 JH3, 2018 JF2, 2018 JE, 2018 JC2, 2018 JA3, 2018 JA, 2018 FS3, 2018 EM2, 2017 KD3, 2008 JN
673!Jana Pittichova Chesley via Table Mtn. Obs. in southern California, 4 in MPECs 2018-K03, 2018-K04, 2018-K07 & 2018-K09 -- 2018 JK3, 2018 JJ3, 2018 JH3, 2008 JN
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 6 in MPECs 2018-K06, 2018-K08, 2018-K12 & 2018-K13 -- 2018 JN, 2018 JG1, 2018 HT3, 2018 HJ2, 2010 OA, 2009 QJ9
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2018-K12 -- 2009 QJ9
L01Visnjan Obs., 2 in MPECs 2018-K05 & 2018-K07 -- 2018 KC, 2018 JK3
C51WISE in Earth polar orbit, 1 in MPEC 2018-K06 -- 2018 HT3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 May '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 JC2JPL Sentry15352050-205013.399e-07-5.25-5.250JPL: Computed at 07:36 today Pacific time based on 59 observations spanning 8.0500 days (2018-May-09.32052 to 2018-May-17.37055). Diameter approximately 0.097 km. from weighted mean H=22.72.
NEODyS1535205015.66e-07-5.03-5.030NEODyS: "Based on 56 optical observations (of which 0 are rejected as outliers) from 2018-05-09.321 to 2018-05-16.316."
2018 JL1JPL Sentry16312112-211535.2003e-06-6.54-6.720JPL: Computed at 09:04 today Pacific time based on 35 observations spanning 5.6757 days (2018-May-08.26382 to 2018-May-13.939535). Diameter approximately 0.016 km. from weighted mean H=26.67.
2018 JG1JPL Sentry15352118-211811.088e-06-6.14-6.140JPL: Computed at 07:22 today Pacific time based on 72 observations spanning 8.0663 days (2018-May-08.17968 to 2018-May-16.245963). Diameter approximately 0.042 km. from weighted mean H=24.54.
NEODyS1535211829.64e-07-6.20-6.37n/aNEODyS: "Based on 71 optical observations (of which 0 are rejected as outliers) from 2018-05-08.180 to 2018-05-16.149."
2018 JNJPL Sentry15352100-210426.848e-07-6.52-6.800JPL: Computed at 07:31 today Pacific time based on 114 observations spanning 11.076 days (2018-May-05.42349 to 2018-May-16.499579). Diameter approximately 0.034 km. from weighted mean H=25.01.
NEODyS15352088-211268.62e-07-6.42-6.480NEODyS: "Based on 111 optical observations (of which 1 are rejected as outliers) from 2018-05-05.424 to 2018-05-16.453."
2018 HJ2JPL Sentry15352085-211420.001008297-2.95-2.950JPL: Computed at 07:10 today Pacific time based on 92 observations spanning 23.082 days (2018-Apr-23.41101 to 2018-May-16.493045). Diameter approximately 0.044 km. from weighted mean H=24.42.

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 17 May '18

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

2149Grabbed MPEC 2018-K09 - 2008 JN - see above
Grabbed MPEC 2018-K10 - 2011 HS60 - see above
Grabbed MPEC 2018-K11 - 2017 KD3 - see above
Grabbed MPEC 2018-K12 - 2009 QJ9 - see above
Grabbed MPEC 2018-K13 - 2010 OA - see above
1940Generated Traffic Report
1631Noted that JPL Sentry has updated its 2018 JL1 risk assessment - see above
1535Noted that JPL Sentry has updated its 2018 HJ2 risk assessment - see above
Noted 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 JG1 risk assessment - see above
Noted that NEODyS has updated its 2018 JG1 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-K03 - 2018 JH3 - see above
Grabbed MPEC 2018-K04 - 2018 JJ3 - see above
Grabbed MPEC 2018-K05 - 2018 KC - see above
Grabbed MPEC 2018-K06 - 2018 HT3 - see above
Grabbed MPEC 2018-K07 - 2018 JK3 - see above
Grabbed MPEC 2018-K08 - Daily Orbit Update - see above