Contents  on 25 June '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 25 June '18

Four objects reported inside ten LD

There are four small Solar-System bodies known to be less than ten lunar distances (LD) from our planet today. Nearest are inbound risk-listed objects 2018 MX4, which moves in from 7.41 to 6.35 LD, and 2018 LR3, coming in from 7.24 to 6.81 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
2.19 LD June 18 2018 MC7 23 m  7.97 to 9.08 LD June 9 - 26 NHATS target, risk - DOU
5.51 LD June 27 2018 MX4 14 m  6.35 from 7.41 LD June 23 - July 2 risk
6.02 LD June 29 2018 LR3 19 m  6.81 from 7.24 LD June 20 - July 8 NHATS target, risk
6.51 LD June 21 2018 LS5 16 m  9.08 to 10.59 LD June 18 - 25 exits ten LD, risk
Approaching
2.8   LD July 4* 2018 MB7 60 m  22.0 from 24.6 LD June 30 - July 8 Earth passage uncertainty +/- 40 mins.*

This report was generated at 1744 UTC with the discovery of just departed 2018 MG7 (MPEC), a relatively large NEO that flew by us at 9.37 LD on June 23rd, and with follow-up in today's DOU MPEC for outbound risk-listed 2018 MC7 and for three departed objects: 2018 LM (risk), 2015 DP155, and 68347 2001 KB67, plus astrometry from 1998 for 152664 1998 FW4.



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 25 June '18

The MPC's NEO Confirmation Page has 28 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 28 objects listed. Of these, fifteen were "one nighters." So far The Tracking News has counted a total of 36 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 25 June '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-M97 - "23:38 UT" - 2018 MJ8


<< DOU on 25 June '18 >>  MPEC 2018-M96 - "12:03 UT" - Daily Orbit Update


MPEC 2018-M95 - "10:37 UT" - 2018 MJ7


MPEC 2018-M94 - "10:34 UT" - 2018 MH7


MPEC 2018-M93 - "10:26 UT" - 2018 MG7

Observers  on 25 June '18

A total of 28 observers appear in today's MPECs.

CodeObserver / observatory
T05ATLAS Haleakala in Hawaii, 18 in MPEC 2018-M96 -- 2015 DP155, 2005 MF5, 99799, 96189, 67367, 475967, 438429, 408752, 36183, 25916, 18882, 17274, 153957, 7350, 6456, 5604, 1685, 1036
T08ATLAS Mauna Loa in Hawaii, 8 in MPECs 2018-M93 & 2018-M96 -- 2018 MG7, 66391, 469737, 455550, 15745, 13553, 1866, 1627
160Castelmartini Obs. in Italy, 13 in MPEC 2018-M96 -- 68950, 68347, 469737, 455550, 415029, 16834, 162168, 15745, 153957, 139345, 13553, 7889, 433
703Catalina Sky Survey (CSS) in Arizona, 18 in MPEC 2018-M96 -- 2018 MX6, 2017 YE5, 2013 QH10, 2010 MF1, 87309, 86039, 85989, 68350, 54401, 439313, 415029, 16834, 162168, 15745, 155340, 140039, 4596, 3691
L29Drebach-South Obs., 6 in MPEC 2018-M96 -- 2018 FY1, 2018 DX3, 68348, 65674, 395207, 138847
J95Great Shefford Obs. in England, 2 in MPECs 2018-M93 & 2018-M95 -- 2018 MJ7, 2018 MG7
L28ISON Castelgrande Obs., 4 in MPEC 2018-M96 -- 85953, 475967, 25916, 1627
H15ISON New Mexico Obs. in New Mexico, 1 in MPEC 2018-M96 -- 438429
I894M. Suzuki in Japan via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2018-M93 -- 2018 MG7
Z43Landehen Obs., 1 in MPEC 2018-M96 -- 139345
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2018-M95 & 2018-M96 -- 2018 MJ7, 2018 LL2, 55408, 516976, 516803, 474574, 259802, 138847
566NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2018-M96 -- 152664
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2018-M96 -- 144411
Z80Northolt Branch Obs. in England, 1 in MPEC 2018-M93 -- 2018 MG7
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2018-M96 -- 1627
F51Pan-STARRS 1 (PS1) in Hawaii, 14 in MPECs 2018-M94, 2018-M95 & 2018-M96 -- 2018 MJ7, 2018 MH7, 2018 LP5, 2018 LN, 2018 KV, 2011 GA62, 86666, 54686, 54660, 53789, 404108, 144332, 7025, 3752
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2018-M96 -- 516976
K63Pascoli Obs. in Italy, 1 in MPEC 2018-M96 -- 2018 EZ
B49Paus Obs. in Spain, 1 in MPEC 2018-M93 -- 2018 MG7
W71Rand II Obs. in New York, 4 in MPEC 2018-M96 -- 2018 LN4, 2015 DP155, 68347, 469737
C95SATINO-1 in France, 1 in MPEC 2018-M93 -- 2018 MG7
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-M96 -- 2018 LC3
Y00SONEAR in Brazil, 1 in MPEC 2018-M93 -- 2018 MG7
I52Steward Obs. Mt. Lemmon Station in Arizona, 19 in MPECs 2018-M93, 2018-M94, 2018-M95 & 2018-M96 -- 2018 MY6, 2018 MS6, 2018 MJ7, 2018 MH7, 2018 MG7, 2018 MF5, 2018 MC7, 2018 LW5, 2018 LN, 2018 LM4, 2018 LL2, 2018 LG5, 2018 LF5, 2018 LC3, 2018 KV, 2018 JS1, 2018 GX4, 2017 YE5, 2017 WH14
A16Tentlingen Obs. in Switzerland, 1 in MPEC 2018-M96 -- 1627
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 5 in MPECs 2018-M96 & 2018-M97 -- 2018 MJ8, 2018 LS3, 2018 LM2, 2018 LM, 2018 LE4
718Wiggins Obs. in Utah, 1 in MPEC 2018-M93 -- 2018 MG7
C51WISE in Earth polar orbit, 1 in MPEC 2018-M97 -- 2018 MJ8
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 25 June '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 MH7JPL Sentry15002089-208923.05063e-07-7.45-7.470JPL: Computed at 05:05 today Pacific time based on 11 observations spanning 1.8477 days (2018-Jun-23.55228 to 2018-Jun-25.40002). Diameter approximately 0.019 km. from weighted mean H=26.21.
2018 MD7NEODyS03222068-2114199.76e-08-6.17-6.280NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2018-06-21.383 to 2018-06-23.971."
2018 MC7JPL Sentry15002060-2109420.000468806265-3.87-3.940JPL: Computed at 07:04 today Pacific time based on 23 observations spanning 4.0012 days (2018-Jun-21.39443 to 2018-Jun-25.39567). Diameter approximately 0.023 km. from weighted mean H=25.84.
NEODyS03222036-21151311.91e-04-4.27-4.410NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2018-06-21.395 to 2018-06-24.404."
2018 MW6NEODyS0322204914.33e-09-5.43-5.430NEODyS: "Based on 48 optical observations (of which 3 are rejected as outliers) from 2018-06-19.266 to 2018-06-23.673."
2018 MC5JPL Sentry17312067-2115114.509991e-06-5.79-6.320JPL: Computed at 09:33 today Pacific time based on 33 observations spanning 11.891 days (2018-Jun-12.475331 to 2018-Jun-24.36597). Diameter approximately 0.031 km. from weighted mean H=25.19.
NEODyS03222054-2114222.14e-05-5.04-5.610NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2018-06-12.476 to 2018-06-24.367."
2018 LS5NEODyS0322210413.44e-08-8.61-8.610NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2018-06-14.356 to 2018-06-24.430."
2018 LE1JPL Sentry17312102-210213.586e-07-8.14-8.140JPL: Computed at 09:33 today Pacific time based on 51 observations spanning 15.991 days (2018-Jun-05.39422 to 2018-Jun-21.385419). Diameter approximately 0.010 km. from weighted mean H=27.70.
2018 LMJPL Sentry15002112-211621.3788e-06-6.46-6.580JPL: Computed at 07:09 today Pacific time based on 89 observations spanning 18.026 days (2018-Jun-04.25437 to 2018-Jun-22.280451). Diameter approximately 0.031 km. from weighted mean H=25.22.

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 25 June '18

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

2358Grabbed MPEC 2018-M97 - 2018 MJ8 - see above
1744Generated Traffic Report
1731Noted that JPL Sentry has updated its 2018 LE1 risk assessment - see above
Noted that JPL Sentry has updated its 2018 MC5 risk assessment - see above
1500Noted that JPL Sentry has updated its 2018 LM risk assessment - see above
Noted that JPL Sentry has updated its 2018 MC7 risk assessment - see above
Noted that JPL Sentry has posted 2018 MH7 as an impact risk - see above
Grabbed MPEC 2018-M93 - 2018 MG7 - see above
Grabbed MPEC 2018-M94 - 2018 MH7 - see above
Grabbed MPEC 2018-M95 - 2018 MJ7 - see above
Grabbed MPEC 2018-M96 - Daily Orbit Update - see above
0322Noted that NEODyS has updated its 2018 LS5 risk assessment - see above
Noted that NEODyS has updated its 2018 MC5 risk assessment - see above
Noted that NEODyS has updated its 2018 MC7 risk assessment - see above
Noted that NEODyS has posted 2018 MD7 as an impact risk - see above
Noted that NEODyS has updated its 2018 MW6 risk assessment - see above