Contents  on 14 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 14 May '18

Nine objects reported inside ten LD

There are nine planetesimals reported inside ten lunar distances (LD) of Earth today. Nearest are 2016 HP6, headed away from 2.47 to 3.27 LD, and intruder 2010 WC9, inbound from 5.50 to 2.68 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 tomorrow 2010 WC9 68 m  2.68 from 5.50 LD May 12 - 19 intruder
2.08 LD May 9 2018 JP 11 m  7.63 to 9.22 LD May 3 - 15 NHATS target
2.16 LD yesterday 2016 HP6 27 m  2.47 to 3.27 LD May 5 - 20 NHATS target
3.88 LD May 16 2018 JX 73 m  5.43 from 7.76 LD yesterday - May 19
4.33 LD May 11 2018 JZ 13 m  8.92 to 11.62 LD May 8 - 14 exits ten LD
4.43 LD yesterday 2018 JA1 26 m  4.45 to 4.76 LD May 6 - 20 NHATS target - DOU
7.44 LD today 2018 JL1 16 m  7.44 LD May 8 - 19 NHATS target, Earth closest at 0501 UTC, risk
8.78 LD today 2018 JY 50 m  8.78 LD May 12 - 16 Earth closest at 1606 UTC
9.33 LD tomorrow 2018 JX1 17 m  9.36 from 9.64 LD yesterday - May 17 DOU

This report was generated at 2042 UTC with the discovery of just departed 2018 JU2 (MPEC), which flew by us at 3.59 LD on May 6th. Today's DOU MPEC has first follow-up for five objects: inbound 2018 JX1 and (all) departed 2018 JM2, 2018 JK2, 2018 JR1, and 2018 JH1, and has continuing follow-up for approaching objects 2018 EJ4, 2015 DP155, and risk-listed 2018 JG1, for outbound 2018 JA1, and for seven departed objects: 2018 JW, 2018 JM, 2014 JR25, 388945 2008 TZ3, and including three that are risk listed: 2018 JN, 2018 GE2, and intruder 2018 HW1.

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 42 m  10.73 from 12.37 LD tomorrow - May 24 risk - DOU
9.50 LD May 29 68347 2001 KB67 371 m  43.89 from 46.94 LD May 28 - 30 radar target
5.56 LD June 10 2018 EJ4 186 m  36.98 from 38.28 LD June 4 - 16 radar/NHATS target - DOU
8.96 LD June 11 2015 DP155 162 m  27.23 from 28.04 LD June 6 - 15 NHATS target - DOU


<< Reading:  The University of Saskatchewan has a good read about researching Earth impacts and near-Earth objects.



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 14 May '18

The MPC's NEO Confirmation Page has 19 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had nineteen objects listed. Of these, ten were "one nighters." So far The Tracking News has counted a total of 30 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 14 May '18

Minor Planet Electronic Circulars

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


MPEC 2018-J80 - "13:54 UT" - 2018 JV2


MPEC 2018-J79 - "13:49 UT" - 2018 JU2


MPEC 2018-J78 - "13:45 UT" - 2018 JT2


MPEC 2018-J77 - "13:41 UT" - 2018 JS2


<< DOU on 14 May '18 >>  MPEC 2018-J76 - "12:06 UT" - Daily Orbit Update

Observers  on 14 May '18

Nineteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 8 in MPECs 2018-J76, 2018-J78 & 2018-J79 -- 2018 JU2, 2018 JT2, 2018 JR1, 2018 JH1, 2018 EE, 2018 CX13, 2017 SB14, 331509
T05ATLAS Haleakala in Hawaii, 14 in MPEC 2018-J76 -- 2018 JA, 2015 DP155, 85989, 285339, 220839, 164121, 163243, 138847, 11066, 9856, 8037, 6053, 3752, 3122
T08ATLAS Mauna Loa in Hawaii, 8 in MPEC 2018-J76 -- 2009 SK104, 88254, 68348, 444193, 242643, 5646, 5604, 1685
U63Burnt Tree Hill Obs., 1 in MPEC 2018-J76 -- 2018 EJ4
703Catalina Sky Survey (CSS) in Arizona, 9 in MPEC 2018-J76 -- 2018 GL1, 2018 FS3, 85989, 474574, 397237, 337228, 152931, 6455, 1866
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPEC 2018-J76 -- 2018 HW1, 2018 HD2, 2018 GW5, 2018 FH5, 2018 EA1, 2018 BO3
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 4 in MPECs 2018-J76, 2018-J77, 2018-J79 & 2018-J80 -- 2018 JV2, 2018 JU2, 2018 JS2, 139359
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2018-J80 -- 2018 JV2
K73Gravina Obs. in Italy, 2 in MPEC 2018-J76 -- 220839, 164121
J95Great Shefford Obs. in England, 1 in MPEC 2018-J76 -- 2018 JC2
K85Kelmis Obs., 1 in MPEC 2018-J76 -- 388945
G96Mt. Lemmon Survey (MLS) in Arizona, 20 in MPECs 2018-J76, 2018-J77, 2018-J78, 2018-J79 & 2018-J80 -- 2018 JV2, 2018 JU2, 2018 JT2, 2018 JS2, 2018 JC, 2018 HV2, 2018 GR5, 2018 GQ2, 2018 DB2, 2017 XH62, 2014 JR25, 2013 KY5, 516976, 508796, 468910, 468909, 350462, 152679, 136874, 4581
J43Oukaimeden Obs. in Morocco, 2 in MPEC 2018-J76 -- 2018 JM, 2018 HV2
033Schwarzschild Obs. in Germany, 1 in MPEC 2018-J80 -- 2018 JV2
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2018-J76 & 2018-J79 -- 2018 JU2, 2018 JN, 2018 JC2, 2018 HJ2, 2018 GD3, 2005 EZ29
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2018-J76 -- 450648
I52Steward Obs. Mt. Lemmon Station in Arizona, 21 in MPECs 2018-J76, 2018-J77, 2018-J79 & 2018-J80 -- 2018 JZ1, 2018 JY1, 2018 JX1, 2018 JW, 2018 JV2, 2018 JU2, 2018 JS2, 2018 JQ1, 2018 JO1, 2018 JM2, 2018 JM1, 2018 JL2, 2018 JK2, 2018 JJ2, 2018 JH2, 2018 JG2, 2018 JG1, 2018 JF2, 2018 JD2, 2018 JA1, 2018 HL2
673!Jana Pittichova Chesley via Table Mtn. Obs. in southern California, 2 in MPECs 2018-J77 & 2018-J80 -- 2018 JV2, 2018 JS2
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-J76 -- 2018 GE2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 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 Sentry18082050-205014.903e-08-6.03-6.030JPL: Computed at 10:49 today Pacific time based on 41 observations spanning 4.8896 days (2018-May-09.32052 to 2018-May-14.21016). Diameter approximately 0.100 km. from weighted mean H=22.60.
2018 JZ1JPL Sentry1808R E M O V E DJPL: Risk listing removed at 1750 UTC today
2018 JL1NEODyS16222112-211426.59e-07-7.44-7.670NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2018-05-08.265 to 2018-05-13.145."
2018 JG1JPL Sentry17332103-210312.577e-10-9.70-9.700JPL: Computed at 10:31 today Pacific time based on 61 observations spanning 6.0885 days (2018-May-08.17968 to 2018-May-14.26822). Diameter approximately 0.042 km. from weighted mean H=24.55.
NEODyS1622211811.69e-06-5.97-5.97-NEODyS: "Based on 57 optical observations (of which 0 are rejected as outliers) from 2018-05-08.180 to 2018-05-13.246."
2018 JNJPL Sentry17332100-210421.9629e-06-6.04-6.100JPL: Computed at 10:32 today Pacific time based on 103 observations spanning 8.9064 days (2018-May-05.42349 to 2018-May-14.32992). Diameter approximately 0.035 km. from weighted mean H=24.96.
2018 HJ2JPL Sentry17332085-208513.654e-04-3.36-3.360JPL: Computed at 10:30 today Pacific time based on 89 observations spanning 20.848 days (2018-Apr-23.41101 to 2018-May-14.25869). Diameter approximately 0.045 km. from weighted mean H=24.37.
2018 HW1JPL Sentry18082108-211871.650619e-05-5.65-5.690JPL: Computed at 10:40 today Pacific time based on 55 observations spanning 18.894 days (2018-Apr-23.20248 to 2018-May-12.09691). Diameter approximately 0.024 km. from weighted mean H=25.77.
2018 GL2JPL Sentry18082061-206114.559e-09-7.90-7.900JPL: Computed at 11:03 today Pacific time based on 70 observations spanning 29.099 days (2018-Apr-11.23475 to 2018-May-10.333798). Diameter approximately 0.048 km. from weighted mean H=24.25.
2018 GE2JPL Sentry18082060-2115660.0001264741171-5.15-5.710JPL: Computed at 10:48 today Pacific time based on 103 observations spanning 27.960 days (2018-Apr-10.40973 to 2018-May-08.370082). Diameter approximately 0.013 km. from weighted mean H=27.02.

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 14 May '18

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

2042Generated Traffic Report
1808Noted that JPL Sentry has updated its 2018 GE2 risk assessment - see above
Noted that JPL Sentry has updated its 2018 GL2 risk assessment - see above
Noted that JPL Sentry has updated its 2018 HW1 risk assessment - see above
Noted that JPL Sentry has updated its 2018 JC2 risk assessment - see above
Noted that JPL Sentry has removed 2018 JZ1 as an impact risk - see above
1733Noted that JPL Sentry has updated its 2018 HJ2 risk assessment - see above
Noted that JPL Sentry has updated its 2018 JG1 risk assessment - see above
Noted that JPL Sentry has updated its 2018 JN risk assessment - see above
1622Noted that NEODyS has updated its 2018 JG1 risk assessment - see above
Noted that NEODyS has updated its 2018 JL1 risk assessment - see above
Grabbed MPEC 2018-J76 - Daily Orbit Update - see above
Grabbed MPEC 2018-J77 - 2018 JS2 - see above
Grabbed MPEC 2018-J78 - 2018 JT2 - see above
Grabbed MPEC 2018-J79 - 2018 JU2 - see above
Grabbed MPEC 2018-J80 - 2018 JV2 - see above