Contents  on 15 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 15 July '18

Two objects reported inside ten LD

Today there are two small objects reported to be less than ten lunar distances (LD) from Earth. Nearest is 2018 NM, which enters our planet's sphere of gravitational influence, moving in from 3.62 to 2.31 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  5.50 to 6.24 LD June 24 - July 21 intruder, NHATS target
1.40 LD July 17 2018 NM 18 m  2.31 from 3.62 LD July 10 - 23 NHATS target, enters Earth SOI
Approaching - sorted by 10-LD bubble entry date
9.36 LD Aug. 27 2018 LQ2 37 m  14.91 from 15.06 LD Aug. 17 - Sept. 6 NHATS target - DOU
4.22 LD Aug. 29 1998 SD9 49 m  124.49 from 128.64 LD Aug. 25 - Sept. 2

This report was generated at 2336 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 15 July '18

The MPC's NEO Confirmation Page has 53 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 53 objects listed. Of these, 35 were "one nighters." So far The Tracking News has counted a total of 68 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 15 July '18

Minor Planet Electronic Circulars

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


MPEC 2018-N94 - "19:46 UT" - 2018 NF4


MPEC 2018-N93 - "19:39 UT" - 2018 ND4


MPEC 2018-N92 - "19:32 UT" - 2018 NC4


MPEC 2018-N91 - "19:28 UT" - 2018 NL4


MPEC 2018-N90 - "19:24 UT" - 2018 NK4


MPEC 2018-N89 - "19:21 UT" - 2018 NJ4


MPEC 2018-N88 - "19:16 UT" - 2018 NH4


MPEC 2018-N87 - "19:12 UT" - 2018 NG4


MPEC 2018-N86 - "19:08 UT" - 2018 NE4


MPEC 2018-N85 - "19:05 UT" - 2018 NB4


MPEC 2018-N84 - "19:01 UT" - 2018 NA4


MPEC 2018-N83 - "18:26 UT" - Comet C/2018 M1 (Catalina)


MPEC 2018-N82 - "18:16 UT" - Comet C/2018 L2 (ATLAS)


MPEC 2018-N81 - "18:05 UT" - Comet 46P/Wirtanen


<< DOU on 15 July '18 >>  MPEC 2018-N80 - "12:13 UT" - Daily Orbit Update

Observers  on 15 July '18

A total of 60 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2018-N94 -- 2018 NF4
H21Astronomical Research Obs. Westfield in Illinois, 10 in MPECs 2018-N80, 2018-N84, 2018-N87, 2018-N88, 2018-N90, 2018-N91, 2018-N93 & 2018-N94 -- 2018 NU3, 2018 NO3, 2018 NL4, 2018 NK4, 2018 NH4, 2018 NG4, 2018 NF4, 2018 ND4, 2018 NB, 2018 NA4
T05ATLAS Haleakala in Hawaii, 2 in MPECs 2018-N82 & 2018-N87 -- 2018 NG4, C/2018 L2
T08ATLAS Mauna Loa in Hawaii, 5 in MPECs 2018-N80, 2018-N82, 2018-N91 & 2018-N94 -- 2018 NV, 2018 NL4, 2018 NF4, 2018 MR8, C/2018 L2
K46Bamberg Obs. in Germany, 1 in MPEC 2018-N80 -- 1627
621Bergisch Gladbach Obs. in Germany, 1 in MPEC 2018-N87 -- 2018 NG4
C77Bernezzo Obs. in Italy, 1 in MPEC 2018-N87 -- 2018 NG4
Q68Blue Mountains Obs. in New South Wales, 1 in MPEC 2018-N82 -- C/2018 L2
215Buchloe Obs. in Germany, 2 in MPECs 2018-N81 & 2018-N83 -- C/2018 M1, 46P
W96Campo Catino Austral Obs. (CAO) in Chile, 2 in MPECs 2018-N81 & 2018-N82 -- C/2018 L2, 46P
X74Campo dos Amarais Obs., 1 in MPEC 2018-N82 -- C/2018 L2
160Castelmartini Obs. in Italy, 6 in MPECs 2018-N80 & 2018-N87 -- 2018 NG4, 2018 MR8, 2015 BR514, 2014 NE3, 2011 GA62, 2009 OG
703Catalina Sky Survey in Arizona, 1 in MPEC 2018-N83 -- C/2018 M1
807Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2018-N92 -- 2018 NC4
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 13 in MPECs 2018-N80, 2018-N85, 2018-N86 & 2018-N88 -- 2018 NO1, 2018 NJ2, 2018 NH4, 2018 NG2, 2018 NF2, 2018 NE4, 2018 NE1, 2018 NC, 2018 NB4, 2018 LU3, 2018 LK5, 2018 GZ4, 2018 GX
K65Cesena Obs. in Italy, 1 in MPEC 2018-N87 -- 2018 NG4
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2018-N87 -- 2018 NG4
106Crni Vrh Obs. in Slovenia, 3 in MPECs 2018-N91, 2018-N93 & 2018-N94 -- 2018 NL4, 2018 NF4, 2018 ND4
K87Dettelbach Vineyard Obs. in Germany, 5 in MPECs 2018-N80, 2018-N87 & 2018-N91 -- 2018 NV2, 2018 NV, 2018 NL4, 2018 NG4, 2018 MM8
G37Discovery Channel Telescope in Arizona, 1 in MPEC 2018-N81 -- 46P
K77EHB01 Obs., 1 in MPEC 2018-N83 -- C/2018 M1
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2018-N85 -- 2018 NB4
734Farpoint Obs. in Kansas, 2 in MPECs 2018-N89 & 2018-N90 -- 2018 NK4, 2018 NJ4
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2018-N87 -- 2018 NG4
157Frasso Sabino Obs. in Italy, 1 in MPEC 2018-N80 -- 2018 NE1
X31Galilei Obs., 1 in MPEC 2018-N94 -- 2018 NF4
372Geisei Obs. in Japan, 1 in MPEC 2018-N82 -- C/2018 L2
K88GINOP-KHK in Hungary, 3 in MPECs 2018-N87, 2018-N91 & 2018-N94 -- 2018 NL4, 2018 NG4, 2018 NF4
K73Gravina Obs. in Italy, 2 in MPEC 2018-N80 -- 25916, 1627
J95Great Shefford Obs. in England, 7 in MPECs 2018-N80, 2018-N87, 2018-N88, 2018-N89, 2018-N91, 2018-N93 & 2018-N94 -- 2018 NV2, 2018 NL4, 2018 NJ4, 2018 NH4, 2018 NG4, 2018 NF4, 2018 ND4
A17Guidestar Obs. in Germany, 3 in MPECs 2018-N87, 2018-N91 & 2018-N94 -- 2018 NL4, 2018 NG4, 2018 NF4
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2018-N94 -- 2018 NF4
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2018-N81 & 2018-N82 -- C/2018 L2, 46P
Q623Rolando Ligustri in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-N81 -- 46P
Q62<program code "<" (37) via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-N82 -- C/2018 L2
K85Kelmis Obs., 1 in MPEC 2018-N80 -- 66391
W87LCO Cerro Tololo C in Chile, 1 in MPEC 2018-N92 -- 2018 NC4
K38M57 Obs. in Italy, 2 in MPECs 2018-N87 & 2018-N94 -- 2018 NG4, 2018 NF4
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2018-N80 -- 518640
900Moriyama Obs. in Japan, 1 in MPEC 2018-N94 -- 2018 NF4
474Mt. John Obs. in New Zealand, 2 in MPECs 2018-N85 & 2018-N92 -- 2018 NC4, 2018 NB4
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2018-N84 -- 2018 NA4
K74Muensterschwarzach Obs. in Germany, 2 in MPECs 2018-N91 & 2018-N94 -- 2018 NL4, 2018 NF4
C47Nonndorf Obs. in Austria, 1 in MPEC 2018-N91 -- 2018 NL4
J69North Obs. in England, 1 in MPEC 2018-N94 -- 2018 NF4
Z80Northolt Branch Obs. in England, 2 in MPECs 2018-N91 & 2018-N94 -- 2018 NL4, 2018 NF4
I41Palomar Transient Factory in southern California, 1 in MPEC 2018-N86 -- 2018 NE4
F51Pan-STARRS 1 (PS1) in Hawaii, 10 in MPECs 2018-N80, 2018-N84, 2018-N85, 2018-N88, 2018-N89, 2018-N90, 2018-N92, 2018-N93 & 2018-N94 -- 2018 NK4, 2018 NJ4, 2018 NH4, 2018 NF4, 2018 ND4, 2018 NC4, 2018 NB4, 2018 NA4, 455213, 357414
F52Pan-STARRS 2 (PS2) in Hawaii, 2 in MPECs 2018-N90 & 2018-N93 -- 2018 NK4, 2018 ND4
K63Pascoli Obs. in Italy, 1 in MPEC 2018-N87 -- 2018 NG4
D29Purple Mtn. Obs. Xuyi Station in China, 11 in MPEC 2018-N80 -- 2018 NU3, 2018 LQ2, 2009 SK104, 1999 RV2, 87025, 514652, 325769, 31210, 155334, 14402, 3352
W71Rand II Obs. in New York, 4 in MPEC 2018-N80 -- 455550, 441987, 138847, 719
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2018-N87, 2018-N89, 2018-N91 & 2018-N94 -- 2018 NL4, 2018 NJ4, 2018 NG4, 2018 NF4
C95SATINO-1 in France, 3 in MPECs 2018-N87, 2018-N91 & 2018-N94 -- 2018 NL4, 2018 NG4, 2018 NF4
204Schiaparelli Obs. in Italy, 3 in MPECs 2018-N87, 2018-N89 & 2018-N94 -- 2018 NJ4, 2018 NG4, 2018 NF4
Q11Shinshiro Obs., 2 in MPECs 2018-N82 & 2018-N83 -- C/2018 M1, C/2018 L2
G40*program code "*" (19) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-N94 -- 2018 NF4
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2018-N80 & 2018-N86 -- 2018 NE4, 2018 ME7
I52Steward Obs. Mt. Lemmon Station in Arizona, 1 in MPEC 2018-N84 -- 2018 NA4
Q38Swan Hill Obs., 1 in MPEC 2018-N82 -- C/2018 L2
J22Tacande Obs. in the Canary Islands, 2 in MPECs 2018-N82 & 2018-N83 -- C/2018 M1, C/2018 L2
L01Visnjan Obs., 8 in MPECs 2018-N80, 2018-N86, 2018-N87, 2018-N88, 2018-N89, 2018-N91, 2018-N93 & 2018-N94 -- 2018 NL4, 2018 NJ4, 2018 NH4, 2018 NG4, 2018 NF4, 2018 NE4, 2018 ND4, 2015 AM45
C51WISE in Earth polar orbit, 4 in MPEC 2018-N80 -- 2018 GA5, 2018 EM2, 2017 DO36, 152637
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 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 NLNEODyS13312057-2115313.46e-04-3.63-3.640NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2018-07-03.404 to 2018-07-12.599."
2018 NJNEODyS13312083-2118683.07e-03-4.16-4.67n/aNEODyS: "Based on 31 optical observations (of which 1 are rejected as outliers) from 2018-07-05.276 to 2018-07-13.615."

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 15 July '18

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

2336Generated Traffic Report
2101Grabbed MPEC 2018-N81 - Comet 46P/Wirtanen - see above
Grabbed MPEC 2018-N82 - Comet C/2018 L2 (ATLAS) - see above
Grabbed MPEC 2018-N83 - Comet C/2018 M1 (Catalina) - see above
Grabbed MPEC 2018-N84 - 2018 NA4 - see above
Grabbed MPEC 2018-N85 - 2018 NB4 - see above
Grabbed MPEC 2018-N86 - 2018 NE4 - see above
Grabbed MPEC 2018-N87 - 2018 NG4 - see above
Grabbed MPEC 2018-N88 - 2018 NH4 - see above
Grabbed MPEC 2018-N89 - 2018 NJ4 - see above
Grabbed MPEC 2018-N90 - 2018 NK4 - see above
Grabbed MPEC 2018-N91 - 2018 NL4 - see above
Grabbed MPEC 2018-N92 - 2018 NC4 - see above
Grabbed MPEC 2018-N93 - 2018 ND4 - see above
Grabbed MPEC 2018-N94 - 2018 NF4 - see above
1331Noted that NEODyS has updated its 2018 NJ risk assessment - see above
Noted that NEODyS has updated its 2018 NL risk assessment - see above
Grabbed MPEC 2018-N80 - Daily Orbit Update - see above