Contents  on 20 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 20 July '18

Two objects reported inside ten LD

Two minor objects are known to be inside ten lunar distances (LD) of our planet today. Nearest is 2018 NM, which travels from 4.38 out to 5.82 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  9.17 to 9.89 LD June 24 - tomorrow intruder, NHATS target
1.40 LD July 17 2018 NM 18 m  4.38 to 5.82 LD July 10 - 23 NHATS target
Approaching - sorted by 10-LD bubble entry date
9.36 LD Aug. 27 2018 LQ2 37 m  14.13 from 14.29 LD Aug. 17 - Sept. 6 NHATS target - DOU
4.22 LD Aug. 29 1998 SD9 49 m  105.52 from 109.11 LD Aug. 25 - Sept. 2

This report was generated at 1810 UTC with follow-up in today's DOU MPEC for approaching 2018 LQ2 and departed 441987 2010 NY65.



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 20 July '18

The MPC's NEO Confirmation Page has 15 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had fifteen objects listed. Of these, six were "one nighters." So far The Tracking News has counted a total of 23 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 20 July '18

Minor Planet Electronic Circulars

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


MPEC 2018-O30 - "15:37 UT" - 2018 NC15


<< DOU on 20 July '18 >>  MPEC 2018-O29 - "12:03 UT" - Daily Orbit Update

Observers  on 20 July '18

A total of 27 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 20 in MPEC 2018-O29 -- 2018 OM, 2018 OL, 2018 OG, 2018 OB, 2018 NV1, 2018 NV, 2018 NU3, 2018 NU1, 2018 NJ4, 2018 MX6, 2018 MR6, 2018 MJ7, 2018 MH, 2018 LY5, 2018 LQ2, 2018 LG, 2018 KV, 2018 JQ1, 2018 JJ2, 2001 YO3
T05ATLAS Haleakala in Hawaii, 8 in MPEC 2018-O29 -- 68350, 495829, 441987, 302591, 15745, 1685, 1627, 719
T08ATLAS Mauna Loa in Hawaii, 4 in MPEC 2018-O29 -- 2018 GA5, 2001 SC170, 455550, 115052
K46Bamberg Obs. in Germany, 1 in MPEC 2018-O29 -- 13553
C77Bernezzo Obs. in Italy, 2 in MPEC 2018-O29 -- 2015 BR514, 2001 SC170
X74Campo dos Amarais Obs., 1 in MPEC 2018-O29 -- 2015 RB82
160Castelmartini Obs. in Italy, 15 in MPEC 2018-O29 -- 2018 NE1, 2018 MR8, 2015 BR514, 2014 NE3, 2012 BV26, 2002 OS4, 86039, 65706, 495829, 438429, 398188, 283729, 16834, 162483, 138847
807Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2018-O30 -- 2018 NC15
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2018-O29 -- 13553
K87Dettelbach Vineyard Obs. in Germany, 10 in MPEC 2018-O29 -- 2018 OM, 2018 OL, 2018 NE1, 2018 NB, 2014 NE3, 2002 OS4, 283729, 15745, 14402, 719
719Etscorn Obs. in New Mexico, 5 in MPEC 2018-O29 -- 283729, 15745, 13553, 1627, 719
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-O29 -- 2018 NB
U68JPL SynTrack Robotic Telescope, 1 in MPEC 2018-O29 -- 2018 OL
C94MASTER-II Tunka in Russia, 1 in MPEC 2018-O29 -- 162168
568^R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2018-O30 -- 2018 NC15
474Mt. John Obs. in New Zealand, 22 in MPECs 2018-O29 & 2018-O30 -- 2018 OM, 2018 OL, 2018 OF, 2018 NW1, 2018 NU2, 2018 NT3, 2018 NT2, 2018 NR1, 2018 NO1, 2018 NM3, 2018 NF2, 2018 NC15, 2018 NC, 2018 MV4, 2018 MO5, 2018 LU15, 2018 LS2, 2018 LR6, 2018 LN5, 2018 LA16, 2018 FE5, 2011 WH15
C47Nonndorf Obs. in Austria, 1 in MPEC 2018-O29 -- 2018 NE1
G34Oberfrauendorf Obs. in Germany, 4 in MPEC 2018-O29 -- 2018 NE1, 2018 NB, 13553, 1627
I41Palomar Transient Factory (PTF) in southern California, 2 in MPEC 2018-O29 -- 2013 EP41, 385268
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2018-O30 -- 2018 NC15
F52Pan-STARRS 2 (PS2) in Hawaii, 5 in MPEC 2018-O29 -- 2014 WL368, 2005 PP, 2001 QA143, 399457, 253062
C95SATINO-1 in France, 1 in MPEC 2018-O29 -- 2018 GA5
Y00SONEAR in Brazil, 1 in MPEC 2018-O29 -- 2018 OM
291Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2018-O29 -- 2018 OM, 2018 NY14, 2014 DN112, 2013 RX80
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2018-O29 -- 2018 NU1, 2018 NE2
C51WISE in Earth polar orbit, 4 in MPEC 2018-O29 -- 2018 NC, 2018 FY1, 152637, 1916
I15Wishing Star Obs. in Rhode Island, 3 in MPEC 2018-O29 -- 2018 JC3, 455550, 138847
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 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 Sentry14232100-210017.668e-10-8.32-8.320JPL: Computed at 07:21 today Pacific time based on 72 observations spanning 2.7937 days (2018-Jul-17.57401 to 2018-Jul-20.3677). Diameter approximately 0.063 km. from weighted mean H=23.66.
NEODyS1308210015.51e-08-6.45-6.450NEODyS: "Based on 55 optical observations (of which 0 are rejected as outliers) from 2018-07-17.575 to 2018-07-19.030."

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 20 July '18

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

1810Generated Traffic Report
1545Grabbed MPEC 2018-O30 - 2018 NC15 - see above
1423Noted that JPL Sentry has updated its 2018 OM risk assessment - see above
1308Noted that NEODyS has updated its 2018 OM risk assessment - see above
Grabbed MPEC 2018-O29 - Daily Orbit Update - see above