Contents  on 19 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 19 July '18

Two objects reported inside ten LD

Two transient natural objects are reported to be within ten lunar distances (LD) of Earth today. Closest is 2018 NM, which is outbound from 3.00 to 4.38 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  8.44 to 9.17 LD June 24 - July 21 intruder, NHATS target - DOU
1.40 LD July 17 2018 NM 18 m  3.00 to 4.38 LD July 10 - 23 NHATS target
Approaching - sorted by 10-LD bubble entry date
9.36 LD Aug. 27 2018 LQ2 37 m  14.29 from 14.44 LD Aug. 17 - Sept. 6 NHATS target
4.22 LD Aug. 29 1998 SD9 49 m  109.11 from 112.79 LD Aug. 25 - Sept. 2

This report was generated at 2306 UTC with follow-up in today's DOU MPEC for 2018 NX.



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 19 July '18

The MPC's NEO Confirmation Page has 23 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 23 objects listed. Of these, sixteen were "one nighters." So far The Tracking News has counted a total of 33 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 19 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.


<< DOU on 19 July '18 >>  MPEC 2018-O28 - "12:03 UT" - Daily Orbit Update


MPEC 2018-O27 - "01:36 UT" - 2018 OM


MPEC 2018-O26 - "01:33 UT" - 2018 OL


MPEC 2018-O25 - "01:30 UT" - 2018 OK


MPEC 2018-O24 - "01:27 UT" - 2018 NY14

Observers  on 19 July '18

A total of 33 observers appear in today's MPECs.

CodeObserver / observatory
B37Ametlla del Valles Obs. in Spain, 1 in MPEC 2018-O26 -- 2018 OL
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPECs 2018-O24, 2018-O25, 2018-O26, 2018-O27 & 2018-O28 -- 2018 OM, 2018 OL, 2018 OK, 2018 OF, 2018 NY14
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2018-O28 -- 25916
T08ATLAS Mauna Loa in Hawaii, 8 in MPECs 2018-O26, 2018-O27 & 2018-O28 -- 2018 OM, 2018 OL, 2015 BR514, 68950, 495829, 283729, 138847, 719
K46Bamberg Obs. in Germany, 1 in MPEC 2018-O28 -- 1627
U63Burnt Tree Hill Obs., 1 in MPEC 2018-O28 -- 2001 SC170
160Castelmartini Obs. in Italy, 18 in MPEC 2018-O28 -- 2018 NE1, 2018 MR8, 2015 BR514, 2014 NE3, 2012 OD1, 2012 BV26, 2011 GA62, 2002 OS4, 495829, 438429, 415029, 398188, 31345, 283729, 162483, 162168, 14402, 138847
K87Dettelbach Vineyard Obs. in Germany, 10 in MPECs 2018-O26 & 2018-O28 -- 2018 OM, 2018 OL, 2018 NE1, 2018 NB, 2014 NE3, 2002 OS4, 283729, 15745, 14402, 719
L29Drebach-South Obs., 2 in MPECs 2018-O26 & 2018-O27 -- 2018 OM, 2018 OL
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2018-O26 & 2018-O27 -- 2018 OM, 2018 OL
K73Gravina Obs. in Italy, 3 in MPEC 2018-O28 -- 25916, 13553, 1627
J95Great Shefford Obs. in England, 3 in MPECs 2018-O26, 2018-O27 & 2018-O28 -- 2018 OM, 2018 OL, 2018 NL4
A17Guidestar Obs. in Germany, 4 in MPEC 2018-O28 -- 2018 OB, 2018 NE1, 2018 MH, 2018 MD7
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-O26 -- 2018 OL
W19Kalamazoo Obs. in Michigan, 4 in MPEC 2018-O28 -- 68950, 15745, 13553, 719
688&Dan Avner via Lowell Obs. Anderson Mesa Station in Arizona, 2 in MPEC 2018-O28 -- 2015 CZ13, 2015 CC14
K38M57 Obs. in Italy, 3 in MPECs 2018-O27 & 2018-O28 -- 2018 OM, 2001 SC170, 138847
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2018-O28 -- 1627
568^R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2018-O24 -- 2018 NY14
474Mt. John Obs. in New Zealand, 13 in MPECs 2018-O25, 2018-O26, 2018-O27 & 2018-O28 -- 2018 OM, 2018 OL, 2018 OK, 2018 NW1, 2018 NT3, 2018 NP1, 2018 NN, 2018 NH2, 2018 NG2, 2018 NG1, 2018 NF2, 2018 LR15, 2014 QR295
I41Palomar Transient Factory in southern California, 1 in MPEC 2018-O28 -- 54401
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2018-O24 & 2018-O25 -- 2018 OK, 2018 NY14
F52Pan-STARRS 2 (PS2) in Hawaii, 2 in MPECs 2018-O24 & 2018-O25 -- 2018 OK, 2018 NY14
K63Pascoli Obs. in Italy, 5 in MPECs 2018-O26, 2018-O27 & 2018-O28 -- 2018 OM, 2018 OL, 2018 NR1, 2001 SC170, 68950
A53Peschiera del Garda Obs. in Italy, 3 in MPEC 2018-O28 -- 2018 NE1, 2015 BR514, 2011 GA62
104San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2018-O25, 2018-O26 & 2018-O27 -- 2018 OM, 2018 OL, 2018 OK
204Schiaparelli Obs. in Italy, 3 in MPECs 2018-O25, 2018-O26 & 2018-O27 -- 2018 OM, 2018 OL, 2018 OK
587Sormano Obs. in Italy, 3 in MPECs 2018-O25, 2018-O26 & 2018-O27 -- 2018 OM, 2018 OL, 2018 OK
291Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2018-O28 -- 2018 NX, 2018 NV, 2018 NT1, 2018 NE, 2018 LL2, 2013 PU31
926Tenagra II Obs. in Arizona, 1 in MPEC 2018-O28 -- 2017 WF1
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-O28 -- 2018 NT1
L01Visnjan Obs., 4 in MPECs 2018-O24, 2018-O25, 2018-O26 & 2018-O27 -- 2018 OM, 2018 OL, 2018 OK, 2018 NY14
C51WISE in Earth polar orbit, 7 in MPEC 2018-O28 -- 2018 GA5, 2018 FY1, 2018 EM2, 2015 BR514, 518635, 152637, 1916
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 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 OMJPL Sentry15032100-210011.083e-08-7.15-7.150JPL: Computed at 07:24 today Pacific time based on 55 observations spanning 1.4553 days (2018-Jul-17.57401 to 2018-Jul-19.0293). Diameter approximately 0.064 km. from weighted mean H=23.63.
NEODyS15002100-211826.6e-08-6.37-6.37n/aNEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2018-07-17.575 to 2018-07-19.030."
2017 OM1JPL Sentry15032079-211391.570887e-06-5.07-5.330JPL: Computed at 18:07 July 18th Pacific time based on 132 observations spanning 2.5921 days (2017-Jul-22.50692 to 2017-Jul-25.098999). Diameter approximately 0.073 km. from weighted mean H=23.32.

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 19 July '18

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

2306Generated Traffic Report
1503Noted that JPL Sentry has updated its 2017 OM1 risk assessment - see above
Noted that JPL Sentry has posted 2018 OM as an impact risk - see above
1500Noted that NEODyS has posted 2018 OM as an impact risk - see above
Grabbed MPEC 2018-O24 - 2018 NY14 - see above
Grabbed MPEC 2018-O25 - 2018 OK - see above
Grabbed MPEC 2018-O26 - 2018 OL - see above
Grabbed MPEC 2018-O27 - 2018 OM - see above
Grabbed MPEC 2018-O28 - Daily Orbit Update - see above