2018-05-14 Tracking News

Contents on 14 May '18

Traffic Report -- nine objects
IAU Minor Planet Center
- NEOCP Activity -- 19 listings
- New MPECs -- five MPECs
Observers -- nineteen observers
Impact Risk Monitoring -- nine objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 944 risk-listed objects, 69 have had news in the last 31 days. Updated at 1835 UTC on 14 May.
Ephemerides for risk-listed objects & close passers
News archive (old) & news image catalog (discontinued)
Object Links - mainly for radar targets & close passers (mostly discontinued)
Observing Campaigns (old)

The latest A/CC news is available via framed access, 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-J76 time-stamped "12:06 UT" - Daily Orbit Update - see below
MPEC 2018-J77 time-stamped "13:41 UT" - 2018 JS2 - see below
MPEC 2018-J78 time-stamped "13:45 UT" - 2018 JT2 - see below
MPEC 2018-J79 time-stamped "13:49 UT" - 2018 JU2 - see below
MPEC 2018-J80 time-stamped "13:54 UT" - 2018 JV2

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

K18J02V 2018 JV2 (small asteroid, H=23.6 ~65m) was picked up at 0742 UT on 12 May by the Mt. Lemmon Survey (MLS), observing it at May 12.32-34p4. This detection was confirmed by Steward Obs. Mt. Lemmon Station (May 12.43-44p4), ESA Optical Ground Station (ESA OGS) (May 12.98-02p4), Schwarzschild Obs. (May 12.99p1, 13.04p3, 13.96-97p3 & 14.03p3), Farra d'Isonzo Obs. (May 12.99-03p2), and Jana Pittichova Chesley via Table Mtn. Obs. (May 13.30-31p2).

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

K18J02U 2018 JU2 (Earth MOID=2.5 LD, H=28.6 ~6m) was picked up at 0716 UT on 12 May by MLS, observing it at May 12.30-32p4 at G=21.1-3 and 13.34-35p3 at G=21.4-22.4. This detection was confirmed by Steward Mt. Lemmon Sta. (May 12.42-43p4), ESA OGS (May 12.95-97p3), Astronomical Research Obs. Westfield (May 13.21-22p3), and the Spacewatch 1.8m telescope (May 14.27-29p3 at R=21.7-22.7).

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

K18J02T 2018 JT2 (small asteroid, q=0.368 AU, H=24.6 ~41m) was picked up at 0616 UT on 12 May by MLS, observing it at May 12.26-28p4 at G=21.1-22.0, 12.39p3 at G=21.8-22.1, 13.25-26p4 at G=19.8-21.4, and 14.24-25p4 at G=21.3-22.5. This detection was confirmed by ARO Westfield (May 13.19-20p3 at V=22.0-22.3).

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

K18J02S 2018 JS2 (small asteroid, H=22.3 ~117m) was picked up at 0511 UT on 12 May by MLS, observing it at May 12.22-23p4 at G=20.5-22.1. This detection was confirmed by Steward Mt. Lemmon Sta. (May 12.31-32p4, 13.17-18p4 & 14.20-22p4), ESA OGS (May 12.91-92p2), and Pittichova/Table Mtn. (May 13.19p2).

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

Observations of risk-listed objects
K18J02C 2018 JC2 (small asteroid, Q=4.584 AU, arc=5 days, H=22.6 ~102m) from Great Shefford Obs. (May 14.01-04p2) and Spacewatch 1.8m (May 14.20-21p3)
K18J01Z 2018 JZ1 (small asteroid, arc=5 days, H=23.7 ~62m) from Steward Mt. Lemmon Sta. (May 14.28-29p3)
K18J01G 2018 JG1 (small asteroid, arc=6 days, H=24.6 ~41m, close passer) from Steward Mt. Lemmon Sta. (May 14.27p4)
K18J00N 2018 JN (small asteroid, arc=9 days, H=25.0 ~34m, close passer) from Spacewatch 1.8m (May 14.32-33p3)
K18H02J 2018 HJ2 (small asteroid, Q=4.016 AU, arc=21 days, H=24.4 ~45m) from Spacewatch 1.8m (May 14.24-26p2 at R=22.4-7)
K18H01W 2018 HW1 (small asteroid, arc=19 days, H=25.8 ~23m, close passer, NHATS target) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (May 12.09-10p3)
K18G02E 2018 GE2 (small asteroid, arc=28 days, H=27.0 ~13m, close passer, NHATS target) from UH/Tholen NEO Follow-Up 2.24m Telescope (May 8.37p1 at G=23.31)
Observations of close-passing objects
K18J02M 2018 JM2 (arc=4 days, H=25.5 ~27m) from Steward Mt. Lemmon Sta. (May 14.38-39p4)
K18J02K 2018 JK2 (arc=4 days, H=25.7 ~25m, NHATS target) from Steward Mt. Lemmon Sta. (May 14.33p4)
K18J01X 2018 JX1 (arc=6 days, H=26.5 ~17m) from Steward Mt. Lemmon Sta. (May 14.37p4)
K18J01R 2018 JR1 (arc=5 days, H=25.6 ~26m) from ARO Westfield (May 13.27-31p3 at V=22.1-3)
K18J01H 2018 JH1 (arc=5 days, H=25.3 ~29m) from ARO Westfield (May 13.11-14p3 at V=22.1-2)
K18J01A 2018 JA1 (arc=6 days, H=25.6 ~26m, NHATS target) from Steward Mt. Lemmon Sta. (May 14.39p4)
K18J00W 2018 JW (arc=7 days, H=25.9 ~22m) from Steward Mt. Lemmon Sta. (May 14.40p4)
K18J00M 2018 JM (arc=9 days, H=23.8 ~59m) from Oukaimeden Obs. (May 14.03-06p4)
K18E04J 2018 EJ4 (arc=61 days, H=21.2 ~195m, NHATS target, radar support) from Burnt Tree Hill Obs. (May 13.26-30p4)
K15DF5P 2015 DP155 (arc=2 opp, H=21.5 ~170m, NHATS target) from ATLAS Haleakala (May 13.53-56p8)
K14J25R 2014 JR25 (Q=4.196 AU, arc=2 opp, H=23.4 ~71m) from MLS (May 13.42-43p4)
c8945 388945 2008 TZ3 from Kelmis Obs. (May 4.89-92p3, 5.88-91p3 & 6.91-93p2)
Observation campaigns (NHATS targets, radar support)
K18J01O 2018 JO1 (arc=6 days, H=25.0 ~34m, NHATS) from Steward Mt. Lemmon Sta. (May 14.41p2)
K18G01L 2018 GL1 (arc=34 days, H=23.6 ~65m, NHATS) from the Catalina Sky Survey (CSS) (May 13.42-43p3)
05604 5604 1992 FE (radar) from ATLAS Mauna Loa (May 13.33-36p4)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small asteroids (H>22.0)
K18J02L 2018 JL2 (arc=4 days, H=24.8 ~37m) from Steward Mt. Lemmon Sta. (May 14.38p4)
K18J02J 2018 JJ2 (Q=4.503 AU, arc=4 days, H=24.2 ~49m) from Steward Mt. Lemmon Sta. (May 14.41p4)
K18J02H 2018 JH2 (arc=4 days, H=23.1 ~81m) from Steward Mt. Lemmon Sta. (May 14.29-31p4)
K18J02G 2018 JG2 (arc=4 days, H=23.9 ~56m) from Steward Mt. Lemmon Sta. (May 14.31p4)
K18J02F 2018 JF2 (arc=5 days, H=24.4 ~45m) from Steward Mt. Lemmon Sta. (May 14.34p4)
K18J01Y 2018 JY1 (arc=5 days, H=23.6 ~65m) from Steward Mt. Lemmon Sta. (May 14.40p4)
K18J01M 2018 JM1 (arc=6 days, H=22.9 ~89m) from Steward Mt. Lemmon Sta. (May 14.32p4)
K18J00C 2018 JC (arc=9 days, H=23.3 ~74m) from MLS (May 13.19-20p4)
K18H02D 2018 HD2 (arc=19 days, H=24.5 ~43m) from Holmes/CTIO (May 12.22-24p3 at G=22.7-9)
K18G03D 2018 GD3 (arc=58 days, H=24.3 ~47m) from Spacewatch 1.8m (May 14.41-43p2 at R=21.7-22.1)
K18D02B 2018 DB2 (arc=77 days, H=22.1 ~129m) from MLS (May 13.44-46p4)
Observations of other objects
K18J02D 2018 JD2 (i=51.5°, q=0.213 AU, arc=5 days, H=18.8 ~589m) from Steward Mt. Lemmon Sta. (May 14.38p4)
K18J01Q 2018 JQ1 (arc=6 days, H=21.5 ~170m) from Steward Mt. Lemmon Sta. (May 14.42p4)
K18J00A 2018 JA (arc=10 days, H=20.4 ~282m) from ATLAS Haleakala (May 13.59-61p4)
K18H02V 2018 HV2 (i=43.3°, arc=17 days, H=20.5 ~269m) from Oukaimeden Obs. (May 13.04-07p4) and MLS (May 14.29-31p4)
K18H02L 2018 HL2 (arc=18 days, H=21.2 ~195m) from Steward Mt. Lemmon Sta. (May 14.16-17p3)
K18G05W 2018 GW5 (Q=5.927 AU, arc=27 days, H=20.7 ~245m) from Holmes/CTIO (May 12.04-07p3 at G=23.1-3)
K18G05R 2018 GR5 (arc=2 opp, H=20.2 ~309m) from MLS (May 13.19-20p4)
K18G02Q 2018 GQ2 (arc=32 days, H=21.7 ~155m) from MLS (May 13.18-20p4)
K18F05H 2018 FH5 (arc=50 days, H=20.3 ~295m) from Holmes/CTIO (May 12.01-02p3)
K18F03S 2018 FS3 (arc=54 days, H=21.4 ~178m) from CSS (May 13.19-21p4)
K18E01A 2018 EA1 (arc=66 days, H=20.7 ~245m) from Holmes/CTIO (May 11.98-99p3 at G=22.4-6)
K18E00E 2018 EE (Q=4.660 AU, arc=68 days, H=21.7 ~155m) from ARO Westfield (May 13.16-20p3 at V=22.1-4)
K18C13X 2018 CX13 (arc=92 days, H=19.3 ~467m) from ARO Westfield (May 13.12-14p3 at V=22.0-22.2)
K18B03O 2018 BO3 (Q=4.039 AU, arc=112 days, H=21.2 ~195m) from Holmes/CTIO (May 12.11-13p4 at G=22.5-6)
K17X62H 2017 XH62 (arc=149 days, H=20.1 ~323m) from MLS (May 13.30-32p4)
K17S14B 2017 SB14 (arc=238 days, H=21.0 ~214m) from ARO Westfield (May 13.33-36p3 at V=22.0-22.2)
K13K05Y 2013 KY5 (arc=2 opp, H=19.5 ~426m) from MLS (May 13.40-41p4)
K09SA4K 2009 SK104 (Q=4.457 AU, arc=2 opp, H=19.2 ~490m) from ATLAS Mauna Loa (May 13.28-31p3)
K05E29Z 2005 EZ29 (arc=3 opp, H=20.3 ~295m) from Spacewatch 1.8m (May 14.37-39p3 at R=22.1-23.0)
p6976 516976 2012 HM1 from MLS (May 13.30-32p4)
o8796 508796 2000 KN44 from MLS (May 13.37-39p4)
l4574 474574 2004 FG1 from CSS (May 13.37-38p4)
k8910 468910 2014 KQ76 from MLS (May 13.36-37p3)
k8909 468909 2014 KZ44 from MLS (May 13.44-46p4)
j0648 450648 2006 UC63 from Squirrel Valley Obs. (May 14.06-08p3)
i4193 444193 2005 SE71 from ATLAS Mauna Loa (May 13.29-32p4)
d7237 397237 2006 KZ112 from CSS (May 13.46-47p4)
Z0462 350462 1998 KG3 from MLS (May 13.26-28p4)
X7228 337228 2000 FL1 from CSS (May 13.29-30p3)
X1509 331509 1999 YA from ARO Westfield (May 13.17-20p3 at V=22.0-22.2)
S5339 285339 1999 JR6 from ATLAS Haleakala (May 13.36-41p7)
O2643 242643 2005 NZ6 from ATLAS Mauna Loa (May 13.36-38p4)
M0839 220839 2004 VA from ATLAS Haleakala (May 13.35-38p4) and Gravina Obs. (May 13.88-90p6)
G4121 164121 2003 YT1 from ATLAS Haleakala (May 13.29-34p8) and Gravina Obs. (May 13.85-87p6)
G3243 163243 2002 FB3 from ATLAS Haleakala (May 13.27-30p4)
F2931 152931 2000 EA107 from CSS (May 13.20-21p3)
F2679 152679 1998 KU2 from MLS (May 13.19-20p4)
D9359 139359 2001 ME1 from ESA OGS (May 13.07-10p4)
D8847 138847 2000 VE62 from ATLAS Haleakala (May 13.57-58p3)
D6874 136874 1998 FH74 from MLS (May 13.21-22p4)
88254 88254 2001 FM129 from ATLAS Mauna Loa (May 13.39-40p4)
85989 85989 1999 JD6 from CSS (May 13.19-21p3) and ATLAS Haleakala (May 13.43-47p3)
68348 68348 2001 LO7 from ATLAS Mauna Loa (May 13.31-33p3)
11066 11066 Sigurd (1992 CC1) from ATLAS Haleakala (May 13.29-31p4)
09856 9856 1991 EE from ATLAS Haleakala (May 13.36-39p4)
08037 8037 1993 HO1 from ATLAS Haleakala (May 13.30-35p8)
06455 6455 1992 HE from CSS (May 13.17-19p4)
06053 6053 1993 BW3 from ATLAS Haleakala (May 13.28-31p4)
05646 5646 1990 TR from ATLAS Mauna Loa (May 13.41-44p4)
04581 4581 Asclepius (1989 FC) from MLS (May 13.30-32p4)
03752 3752 Camillo (1985 PA) from ATLAS Haleakala (May 13.43-46p4)
03122 3122 Florence (1981 ET3) from ATLAS Haleakala (May 13.28-31p4)
01866 1866 Sisyphus (1972 XA) from CSS (May 13.26-28p4)
01685 1685 Toro (1948 OA) from ATLAS Mauna Loa (May 13.36-39p4)

Observers on 14 May '18

Nineteen observers appear in today's MPECs.

Code	Observer / observatory
`H21`	Astronomical 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
`T05`	ATLAS Haleakala in Hawaii, 14 in MPEC 2018-J76 -- 2018 JA, 2015 DP155, 85989, 285339, 220839, 164121, 163243, 138847, 11066, 9856, 8037, 6053, 3752, 3122
`T08`	ATLAS Mauna Loa in Hawaii, 8 in MPEC 2018-J76 -- 2009 SK104, 88254, 68348, 444193, 242643, 5646, 5604, 1685
`U63`	Burnt Tree Hill Obs., 1 in MPEC 2018-J76 -- 2018 EJ4
`703`	Catalina 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
`J04`	ESA 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
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2018-J80 -- 2018 JV2
`K73`	Gravina Obs. in Italy, 2 in MPEC 2018-J76 -- 220839, 164121
`J95`	Great Shefford Obs. in England, 1 in MPEC 2018-J76 -- 2018 JC2
`K85`	Kelmis Obs., 1 in MPEC 2018-J76 -- 388945
`G96`	Mt. 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
`J43`	Oukaimeden Obs. in Morocco, 2 in MPEC 2018-J76 -- 2018 JM, 2018 HV2
`033`	Schwarzschild Obs. in Germany, 1 in MPEC 2018-J80 -- 2018 JV2
`291`	Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2018-J76 & 2018-J79 -- 2018 JU2, 2018 JN, 2018 JC2, 2018 HJ2, 2018 GD3, 2005 EZ29
`W34`	Squirrel Valley Obs. in North Carolina, 1 in MPEC 2018-J76 -- 450648
`I52`	Steward 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
`T12`	UH/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 JC2	JPL Sentry	1808	2050-2050	1	4.903e-08	-6.03	-6.03	0	JPL: 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 JZ1	JPL Sentry	1808	R E M O V E D						JPL: Risk listing removed at 1750 UTC today

2018 JL1	NEODyS	1622	2112-2114	2	6.59e-07	-7.44	-7.67	0	NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2018-05-08.265 to 2018-05-13.145."

2018 JG1	JPL Sentry	1733	2103-2103	1	2.577e-10	-9.70	-9.70	0	JPL: 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.
2018 JG1	NEODyS	1622	2118	1	1.69e-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 JN	JPL Sentry	1733	2100-2104	2	1.9629e-06	-6.04	-6.10	0	JPL: 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 HJ2	JPL Sentry	1733	2085-2085	1	3.654e-04	-3.36	-3.36	0	JPL: 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 HW1	JPL Sentry	1808	2108-2118	7	1.650619e-05	-5.65	-5.69	0	JPL: 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 GL2	JPL Sentry	1808	2061-2061	1	4.559e-09	-7.90	-7.90	0	JPL: 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 GE2	JPL Sentry	1808	2060-2115	66	0.0001264741171	-5.15	-5.71	0	JPL: 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.

2042	Generated Traffic Report
1808	Noted 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
1733	Noted 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
1622	Noted 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

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