Contents  on 17 July '18

NOTE:  These A/CC news pages will update less often for an extended period. All discoveries and observing credits will be reported, but we may miss some interim impact risk assessments and undercount NEOCP objects, and there may be some days without a traffic report for Earth's Busy Neighborhood.

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 July '18

Two objects reported inside ten LD

Two small Solar-System bodies are known to be inside ten lunar distances (LD) of Earth today. Nearest is 2018 NM, which comes its closest to our planet this time around, reaching 1.40 LD at 0528 UTC, and its closest to the Moon -- 1.06 LD at 0325 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
0.30 LD July 7 2018 NX 10 m  6.97 to 7.71 LD June 24 - July 21 intruder, NHATS target
1.40 LD today 2018 NM 18 m  1.40 LD July 10 - 23 NHATS target, Moon closest 1.06 LD at
0325 UTC, Earth closest at 0528 UTC
Approaching - sorted by 10-LD bubble entry date
9.36 LD Aug. 27 2018 LQ2 37 m  14.60 from 14.76 LD Aug. 17 - Sept. 6 NHATS target - DOU
4.22 LD Aug. 29 1998 SD9 49 m  116.58 from 120.48 LD Aug. 25 - Sept. 2

This report was generated at 2020 UTC with follow-up in today's DOU MPEC for approaching 2018 LQ2 and for four departed objects: 2018 NH, 1999 FN19, and risk-listed 2018 NL and 2018 MC7.

Editor's note:  You may notice a bunch of odd circulars in today's MPECs. These report astrometry for, and the discovery of, some new moons of Jupiter. You can read about these in a Carnegie news item from yesterday.



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 17 July '18

The MPC's NEO Confirmation Page has 40 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 40 objects listed. Of these, 25 were "one nighters." So far The Tracking News has counted a total of 63 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 July '18

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been fifteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-O20 - "23:49 UT" - 2018 OB


MPEC 2018-O19 - "14:55 UT" - 2018 NR4


MPEC 2018-O18 - "14:30 UT" - S/2018 J 1


MPEC 2018-O17 - "14:27 UT" - S/2017 J 9


MPEC 2018-O16 - "14:24 UT" - S/2017 J 8


MPEC 2018-O15 - "14:21 UT" - S/2017 J 7


MPEC 2018-O14 - "14:16 UT" - S/2017 J 6


MPEC 2018-O13 - "14:10 UT" - S/2017 J 5


MPEC 2018-O12 - "14:05 UT" - S/2017 J 4


MPEC 2018-O11 - "13:59 UT" - S/2017 J 3


MPEC 2018-O10 - "13:54 UT" - S/2017 J 2


MPEC 2018-O09 - "13:50 UT" - S/2016 J 2


MPEC 2018-O08 - "13:41 UT" - S/2003 J 19


MPEC 2018-O07 - "13:32 UT" - 2013 OH


<< DOU on 17 July '18 >>  MPEC 2018-O06 - "12:03 UT" - Daily Orbit Update

Observers  on 17 July '18

A total of 36 observers appear in today's MPECs.

CodeObserver / observatory
B37Ametlla del Valles Obs. in Spain, 2 in MPECs 2018-O06 & 2018-O20 -- 2018 OB, 2018 NL4
E23Arcadia Obs. in New South Wales, 1 in MPEC 2018-O20 -- 2018 OB
H21Astronomical Research Obs. Westfield in Illinois, 12 in MPECs 2018-O06 & 2018-O20 -- 2018 OB, 2018 NV, 2018 MW6, 2018 MS6, 2018 MR8, 2018 MM8, 2018 LZ5, 2018 LQ2, 2018 LG, 2018 JS1, 2018 JC3, 2017 GT5
T05ATLAS Haleakala in Hawaii, 4 in MPEC 2018-O06 -- 2018 MR8, 455550, 162483, 3752
T08ATLAS Mauna Loa in Hawaii, 16 in MPEC 2018-O06 -- 2018 KE3, 2018 JC3, 99799, 495829, 31345, 283729, 189865, 18882, 17181, 15745, 14402, 7889, 5604, 2061, 1627, 719
K46Bamberg Obs. in Germany, 1 in MPEC 2018-O06 -- 1627
X74Campo dos Amarais Obs., 1 in MPEC 2018-O06 -- 162168
160Castelmartini Obs. in Italy, 1 in MPEC 2018-O06 -- 2018 NV2
807Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2018-O19 -- 2018 NR4
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2018-O20 -- 2018 OB
J27El Guijo Obs. in Spain, 1 in MPEC 2018-O06 -- 68950
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPEC 2018-O06 -- 18882, 7350
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2018-O20 -- 2018 OB
J95Great Shefford Obs. in England, 3 in MPECs 2018-O06 & 2018-O20 -- 2018 OB, 2018 NL4, 2018 ND4
A17Guidestar Obs. in Germany, 4 in MPEC 2018-O06 -- 2015 AX16, 2012 OD1, 2012 BV26, 2002 NE71
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-O06 -- 2012 DG61
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-O20 -- 2018 OB
Z22MASTER IAC Obs. in the Canary Islands, 2 in MPEC 2018-O06 -- 87311, 1627
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2018-O06 -- 89959
474Mt. John Obs. in New Zealand, 2 in MPECs 2018-O19 & 2018-O20 -- 2018 OB, 2018 NR4
628Mulheim-Ruhr Obs. in Germany, 1 in MPEC 2018-O06 -- 2011 GA62
J69North Obs. in England, 1 in MPEC 2018-O06 -- 2018 MR8
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2018-O06 -- 2018 NL4
C23Olmen Obs. in Belgium, 1 in MPEC 2018-O06 -- 1627
I41Palomar Transient Factory (PTF) in southern California, 3 in MPEC 2018-O06 -- 54401, 138847, 138524
F51Pan-STARRS 1 (PS1) in Hawaii, 12 in MPECs 2018-O06, 2018-O07 & 2018-O19 -- 2018 NR4, 2018 LR15, 2016 YV8, 2014 WL368, 2013 OH, 2012 RS16, 2002 OS4, 302591, 288807, 249595, 218863, 15745
F52Pan-STARRS 2 (PS2) in Hawaii, 4 in MPECs 2018-O06, 2018-O07 & 2018-O20 -- 2018 OB, 2013 OH, 2001 SK276, 1999 FN19
K63Pascoli Obs. in Italy, 1 in MPEC 2018-O20 -- 2018 OB
B49Paus Obs. in Spain, 1 in MPEC 2018-O06 -- 2018 NL4
D29Purple Mtn. Obs. Xuyi Station in China, 13 in MPEC 2018-O06 -- 2009 QJ9, 1999 FN19, 474223, 418929, 410088, 31345, 24445, 242708, 189973, 180186, 162168, 141527, 139359
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-O20 -- 2018 OB
H36Sandlot Obs. in Kansas, 1 in MPEC 2018-O20 -- 2018 OB
204Schiaparelli Obs. in Italy, 5 in MPEC 2018-O06 -- 2018 NV3, 2018 NH, 2018 MH, 2018 KT, 2002 OS4
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-O06 -- 2018 NE1
Z52The Studios Obs., 1 in MPEC 2018-O06 -- 13553
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPEC 2018-O06 -- 2018 NL, 2018 MC7, 2018 LV5, 2018 LD16
L01Visnjan Obs., 1 in MPEC 2018-O20 -- 2018 OB
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 July '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2359 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 NLJPL Sentry18202060-210985.223992e-05-4.44-4.460JPL: Computed at 07:21 today Pacific time based on 22 observations spanning 12.197 days (2018-Jul-03.40294 to 2018-Jul-15.599931). Diameter approximately 0.030 km. from weighted mean H=25.24.
2018 MC7JPL Sentry18202060-2109250.0015085533-3.46-3.460JPL: Computed at 07:18 today Pacific time based on 37 observations spanning 24.132 days (2018-Jun-21.39443 to 2018-Jul-15.526836). Diameter approximately 0.021 km. from weighted mean H=26.07.

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 July '18

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

2359Grabbed MPEC 2018-O20 - 2018 OB - see above
2020Generated Traffic Report
1820Noted that JPL Sentry has updated its 2018 MC7 risk assessment - see above
Noted that JPL Sentry has updated its 2018 NL risk assessment - see above
Grabbed MPEC 2018-O06 - Daily Orbit Update - see above
Grabbed MPEC 2018-O07 - 2013 OH - see above
Grabbed MPEC 2018-O08 - S/2003 J 19 - see above
Grabbed MPEC 2018-O09 - S/2016 J 2 - see above
Grabbed MPEC 2018-O10 - S/2017 J 2 - see above
Grabbed MPEC 2018-O11 - S/2017 J 3 - see above
Grabbed MPEC 2018-O12 - S/2017 J 4 - see above
Grabbed MPEC 2018-O13 - S/2017 J 5 - see above
Grabbed MPEC 2018-O14 - S/2017 J 6 - see above
Grabbed MPEC 2018-O15 - S/2017 J 7 - see above
Grabbed MPEC 2018-O16 - S/2017 J 8 - see above
Grabbed MPEC 2018-O17 - S/2017 J 9 - see above
Grabbed MPEC 2018-O18 - S/2018 J 1 - see above
Grabbed MPEC 2018-O19 - 2018 NR4 - see above