Contents  on 9 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 9 July '18

Four objects reported inside ten LD

There are four asteroids reported within ten lunar distances (LD) of our home world today. Inside Earth's sphere of gravitational influence, newly announced intruder 2018 NX is the nearest of the four, and is outbound from 1.04 to 1.79 LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41, 5.0 & 10.0 LD boundaries
0.30 LD July 7 2018 NX 10 m  1.04 to 1.79 LD June 24 - July 21 NEW, intruder, inside Earth SOI - MPEC
0.32 LD yesterday 2018 NW 9 m  4.13 to 8.87 LD July 6 - 10 NEW, intruder, risk - MPEC
2.37 LD July 7 2018 NJ 9 m  3.55 to 4.63 LD June 29 - July 14 NHATS target, risk
2.42 LD July 6 2018 NU 24 m  5.43 to 7.44 LD July 2 - 11 NEW - MPEC, DOU
Approaching - sorted by 10-LD bubble entry date
1.4   LD July 17* 2018 NM 18 m  10.9 from 12.4 LD tomorrow - July 23 Earth passage uncertainty +/- 33 mins.*, NHATS target
9.36 LD Aug. 27 2018 LQ2 39 m  15.81 from 15.96 LD Aug. 17 - Sept. 6 NHATS target
4.22 LD Aug. 29 1998 SD9 49 m  151.46 from 156.50 LD Aug. 25 - Sept. 2

This report was updated at 2336 UTC with the discovery announced late yesterday of 2018 NU (MPEC, DOU), and today's announcements of outbound intruders 2018 NX (MPEC) and 2018 NW (MPEC), as well as just departed 2018 NY (MPEC), which flew by us at 7.95 LD on July 5th. The day's DOU MPEC has follow-up for departed objects 441987 2010 NY65 and 68347 2001 KB67.



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 9 July '18

The MPC's NEO Confirmation Page has 37 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 37 objects listed. Of these, seventeen were "one nighters." So far The Tracking News has counted a total of 41 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 9 July '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-N35 - "21:03 UT" - 2018 NX


MPEC 2018-N34 - "20:52 UT" - 2018 NW


MPEC 2018-N33 - "18:55 UT" - 2018 NY


<< DOU on 9 July '18 >>  MPEC 2018-N32 - "12:05 UT" - Daily Orbit Update


MPEC 2018-N31 - "02:20 UT" - 2018 NV

Observers  on 9 July '18

A total of 34 observers appear in today's MPECs.

CodeObserver / observatory
B37Ametlla del Valles Obs. in Spain, 2 in MPECs 2018-N31 & 2018-N32 -- 2018 NV, 2018 NQ
E23Arcadia Obs. in New South Wales, 1 in MPEC 2018-N31 -- 2018 NV
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPECs 2018-N32, 2018-N33 & 2018-N34 -- 2018 NY, 2018 NW, 2018 NS, 2018 NR, 2018 NQ, 2018 MX6, 2018 MM8, 2018 LP5, 2018 LO3, 2018 KD3, 2017 WL1, 2016 JH12, 2012 XC55, 2010 WP8, 163758
T05ATLAS Haleakala in Hawaii, 13 in MPEC 2018-N32 -- 2015 BR514, 2011 GA62, 68950, 455550, 441987, 398188, 17181, 15745, 14402, 138847, 13553, 1866, 719
R58Beverly-Begg Obs., 1 in MPEC 2018-N31 -- 2018 NV
U63Burnt Tree Hill Obs., 1 in MPEC 2018-N32 -- 85989
X74Campo dos Amarais Obs., 1 in MPEC 2018-N31 -- 2018 NV
160Castelmartini Obs. in Italy, 6 in MPEC 2018-N32 -- 2018 NQ, 2018 MR8, 2014 NE3, 2011 GA62, 455550, 441987
N55Corona Borealis Obs. in Tibet, 1 in MPEC 2018-N31 -- 2018 NV
K87Dettelbach Vineyard Obs. in Germany, 3 in MPECs 2018-N31 & 2018-N32 -- 2018 NV, 2018 NB, 2018 NA
I19El Gato Gris Obs. in Argentina, 1 in MPEC 2018-N31 -- 2018 NV
157Frasso Sabino Obs. in Italy, 1 in MPEC 2018-N32 -- 385268
J95Great Shefford Obs. in England, 3 in MPECs 2018-N31, 2018-N32 & 2018-N33 -- 2018 NY, 2018 NV, 2018 NS
A17Guidestar Obs. in Germany, 3 in MPECs 2018-N31 & 2018-N32 -- 2018 NV, 2018 MR8, 2018 LZ5
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-N35 -- 2018 NX
D35Lulin Minor Bodies Tracking in Taiwan, 1 in MPEC 2018-N34 -- 2018 NW
K38M57 Obs. in Italy, 1 in MPEC 2018-N31 -- 2018 NV
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2018-N32 -- 2061
932McCarthy Obs. in Connecticut, 1 in MPEC 2018-N32 -- 2018 NV
W55Natelli Obs. in Maryland, 1 in MPEC 2018-N32 -- 68347
J69North Obs. in England, 1 in MPEC 2018-N31 -- 2018 NV
Z80Northolt Branch Obs. in England, 4 in MPECs 2018-N31 & 2018-N32 -- 2018 NV, 2011 GA62, 162483, 13553
C23Olmen Obs. in Belgium, 1 in MPEC 2018-N31 -- 2018 NV
I41Palomar Transient Factory (PTF) in southern California, 3 in MPECs 2018-N32, 2018-N34 & 2018-N35 -- 2018 NX, 2018 NW, 2018 NU
F51Pan-STARRS 1 (PS1) in Hawaii, 18 in MPECs 2018-N32 & 2018-N33 -- 2018 NY, 2018 NN, 2014 HM187, 2007 LT, 2005 CS6, 2002 OS4, 99799, 89959, 471956, 467917, 366774, 331471, 16064, 7350, 7341, 4341, 4183, 3352
W71Rand II Obs. in New York, 1 in MPEC 2018-N32 -- 2018 NV
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-N31 -- 2018 NV
H36Sandlot Obs. in Kansas, 1 in MPEC 2018-N35 -- 2018 NX
C95SATINO-1 in France, 1 in MPEC 2018-N31 -- 2018 NV
204Schiaparelli Obs. in Italy, 1 in MPEC 2018-N31 -- 2018 NV
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-N32 -- 2018 NB
Y00SONEAR in Brazil, 1 in MPEC 2018-N31 -- 2018 NV
W34Squirrel Valley Obs. in North Carolina, 2 in MPECs 2018-N31 & 2018-N32 -- 2018 NV, 162483
L01Visnjan Obs., 1 in MPEC 2018-N31 -- 2018 NV
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 9 July '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 NWJPL Sentry23002046-2117710.000323354757-4.81-5.440JPL: Computed at 15:05 today Pacific time based on 17 observations spanning 1.3661 days (2018-Jul-08.34866 to 2018-Jul-09.71478). Diameter approximately 0.009 km. from weighted mean H=27.83.
2018 NSJPL Sentry18362023-211532.28899e-08-5.37-5.390JPL: Computed at 07:02 today Pacific time based on 20 observations spanning 16.708 days (2018-Jun-22.286092 to 2018-Jul-08.99387). Diameter approximately 0.136 km. from weighted mean H=22.00.

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 9 July '18

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

2336Generated Traffic Report
2300Noted that JPL Sentry has posted 2018 NW as an impact risk - see above
2143Grabbed MPEC 2018-N34 - 2018 NW - see above
Grabbed MPEC 2018-N35 - 2018 NX - see above
1930Grabbed MPEC 2018-N33 - 2018 NY - see above
1836Noted that JPL Sentry has updated its 2018 NS risk assessment - see above
1345Grabbed MPEC 2018-N31 - 2018 NV - see above
Grabbed MPEC 2018-N32 - Daily Orbit Update - see above