Contents  on 11 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 11 July '18

Four objects reported inside ten LD

There are four small celestial bodies reported within ten lunar distances (LD) of our planet today. Nearest is intruder 2018 NX, which is outbound from 2.54 to 3.28 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
0.30 LD July 7 2018 NX 10 m  2.54 to 3.28 LD June 24 - July 21 intruder, NHATS target - DOU
1.40 LD July 17 2018 NM 18 m  7.95 from 9.42 LD yesterday - July 23 NHATS target - DOU
2.37 LD July 7 2018 NJ 9 m  5.82 to 7.06 LD June 29 - July 14 NHATS target, risk
2.42 LD July 6 2018 NU 24 m  9.53 to 11.65 LD July 2 - 11 exits ten LD
Approaching - sorted by 10-LD bubble entry date
9.36 LD Aug. 27 2018 LQ2 39 m  15.52 from 15.67 LD Aug. 17 - Sept. 6 NHATS target
4.22 LD Aug. 29 1998 SD9 49 m  141.88 from 146.59 LD Aug. 25 - Sept. 2

This report was generated at 1942 UTC with follow-up in today's DOU MPEC for inbound 2018 NM, outbound 2018 NX, departed objects 68347 2001 KB67 and three that are risk listed: 2018 MC7, 2018 JG1, and intruder 2018 NW, plus distant 207398 2006 AS2.



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 11 July '18

The MPC's NEO Confirmation Page has 73 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 73 objects listed. Of these, 52 were "one nighters." So far The Tracking News has counted a total of 87 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 11 July '18

Minor Planet Electronic Circulars

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


MPEC 2018-N52 - "22:35 UT" - ADES Submissions and the New Processing Pipeline

Excerpt: "Starting on 2018 July 25, the Minor Planet Center will accept ADES-format submissions from all observers. From that date, ADES submissions will be the preferred submission format [although the] Minor Planet Center will continue to accept obs80-format observations. It is imperative that you read the ADES Data Submissions webpage (https://www.minorplanetcenter.net/iau/info/ADES.html) before attempting to submit any ADES-format observations."


MPEC 2018-N51 - "22:02 UT" - 2018 NR1


MPEC 2018-N50 - "21:58 UT" - 2018 NS1


MPEC 2018-N49 - "21:54 UT" - 2018 NQ1


MPEC 2018-N48 - "21:50 UT" - 2018 NP1


MPEC 2018-N47 - "21:47 UT" - 2018 NO1


MPEC 2018-N46 - "21:43 UT" - 2018 NN1


MPEC 2018-N45 - "21:11 UT" - 2014 YJ42


<< DOU on 11 July '18 >>  MPEC 2018-N44 - "12:05 UT" - Daily Orbit Update

Observers  on 11 July '18

A total of 21 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPECs 2018-N44, 2018-N46, 2018-N47, 2018-N48 & 2018-N50 -- 2018 NS1, 2018 NP1, 2018 NO1, 2018 NN1, 2018 NG1
T05ATLAS Haleakala in Hawaii, 16 in MPEC 2018-N44 -- 2018 KE3, 2017 YE5, 2010 AK, 2009 SK104, 96189, 86324, 67367, 518469, 511523, 444935, 36183, 326386, 25916, 17274, 5646, 1685
160Castelmartini Obs. in Italy, 8 in MPEC 2018-N44 -- 2009 OG, 86039, 65996, 31345, 16960, 16834, 162168, 14402
734Farpoint Obs. in Kansas, 5 in MPECs 2018-N47, 2018-N48, 2018-N49, 2018-N50 & 2018-N51 -- 2018 NS1, 2018 NR1, 2018 NQ1, 2018 NP1, 2018 NO1
K83Forti Obs., 2 in MPEC 2018-N44 -- 2011 GA62, 68950
J95Great Shefford Obs. in England, 3 in MPECs 2018-N44, 2018-N46 & 2018-N49 -- 2018 NX, 2018 NQ1, 2018 NN1
Z43Landehen Obs., 2 in MPEC 2018-N44 -- 162168, 138847
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2018-N44 -- 18109
474Mt. John Obs. in New Zealand, 10 in MPEC 2018-N44 -- 2018 NN, 2018 NM, 2018 MR5, 2018 MO5, 2018 MH7, 2018 LQ15, 2018 LD16, 2018 LA16, 2017 VU14, 2016 OP5
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2018-N44 -- 2014 US192, 138937
C23Olmen Obs. in Belgium, 1 in MPEC 2018-N44 -- 1627
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2018-N44 -- 2017 YE5
F51Pan-STARRS 1 (PS1) in Hawaii, 24 in MPECs 2018-N44, 2018-N45, 2018-N46, 2018-N47, 2018-N48, 2018-N49, 2018-N50 & 2018-N51 -- 2018 NS1, 2018 NR1, 2018 NQ1, 2018 NP1, 2018 NO1, 2018 NN1, 2018 MT6, 2018 KE3, 2018 GL1, 2017 QP17, 2014 YJ42, 2014 WO7, 2012 UV27, 2012 LT7, 2009 SK104, 2007 LC15, 2005 PJ2, 85713, 511523, 416231, 37655, 337084, 24761, 5011
F52Pan-STARRS 2 (PS2) in Hawaii, 7 in MPECs 2018-N44, 2018-N49, 2018-N50 & 2018-N51 -- 2018 NS1, 2018 NR1, 2018 NQ1, 68347, 513182, 207398, 7025
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2018-N49 -- 2018 NQ1
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2018-N46 & 2018-N48 -- 2018 NP1, 2018 NN1
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2018-N47 -- 2018 NO1
I52Steward Obs. Mt. Lemmon Station in Arizona, 1 in MPEC 2018-N46 -- 2018 NN1
A16Tentlingen Obs. in Switzerland, 1 in MPEC 2018-N44 -- 2015 BR514
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPEC 2018-N44 -- 2018 NW, 2018 NS, 2018 MC7, 2018 JG1
E08Wobblesock Obs. in New South Wales, 1 in MPEC 2018-N48 -- 2018 NP1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 11 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 NWNEODyS15002046-21181083.03e-04-4.84-5.41n/aNEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2018-07-08.349 to 2018-07-09.716."
JPL Sentry14332046-2117670.0003416024045-4.78-5.380JPL: Computed at 07:28 today Pacific time based on 19 observations spanning 2.0151 days (2018-Jul-08.34866 to 2018-Jul-10.363716). Diameter approximately 0.009 km. from weighted mean H=27.83.
2018 NSJPL Sentry1433R E M O V E DJPL: Risk listing removed at 1424 UTC today
NEODyS15002023-2115134.55e-08-5.05-5.060NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2018-06-22.287 to 2018-07-08.995."
2018 MH7JPL Sentry1433R E M O V E DJPL: Risk listing removed at 1419 UTC today
2018 MC7JPL Sentry17092060-2115270.00070160746-3.74-3.750JPL #2 for the day: Computed at 08:34 today Pacific time based on 32 observations spanning 19.191 days (2018-Jun-21.39443 to 2018-Jul-10.585044). Diameter approximately 0.022 km. from weighted mean H=25.96.

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 11 July '18

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

2323Grabbed MPEC 2018-N46 - 2018 NN1 - see above
Grabbed MPEC 2018-N47 - 2018 NO1 - see above
Grabbed MPEC 2018-N48 - 2018 NP1 - see above
Grabbed MPEC 2018-N49 - 2018 NQ1 - see above
Grabbed MPEC 2018-N50 - 2018 NS1 - see above
Grabbed MPEC 2018-N51 - 2018 NR1 - see above
Grabbed MPEC 2018-N52 - ADES Submissions and the New Processing Pipeline - see above
2138Grabbed MPEC 2018-N45 - 2014 YJ42 - see above
1942Generated Traffic Report
1709Noted that JPL Sentry has updated its 2018 MC7 risk assessment - see above
1500Noted that NEODyS has updated its 2018 NS risk assessment - see above
Noted that NEODyS has posted 2018 NW as an impact risk - see above
1433Noted that JPL Sentry has updated its 2018 MC7 risk assessment - see above
Noted that JPL Sentry has removed 2018 MH7 as an impact risk - see above
Noted that JPL Sentry has removed 2018 NS as an impact risk - see above
Noted that JPL Sentry has updated its 2018 NW risk assessment - see above
1350Grabbed MPEC 2018-N44 - Daily Orbit Update - see above