Contents  on 8 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 8 July '18

Three objects reported inside ten LD

Bulletin - 2359 UTC:  One new discovery of a close passer has been announced.

Earth passageI D~Size~Inside ten LDNotes
~2.6 LD ~yesterday2018 NU25 m July 2 - 11MPEC


Three asteroidal objects are reported inside ten lunar distances (LD) of Earth today. Closest is risk-listed 2018 NJ, which is outbound from 2.70 to 3.55 LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 2.41, 5.0 & 10.0 LD boundaries
2.37 LD yesterday 2018 NJ 9 m  2.70 to 3.55 LD June 29 - July 14 NHATS target, risk - DOU
2.78 LD July 4 2018 MB7 59 m  9.88 to 12.41 LD June 30 - today exits ten LD
6.01 LD June 29 2018 LR3 19 m  9.36 to 10.05 LD June 20 - today NHATS target, exits ten LD, risk
Approaching - sorted by 10-LD bubble entry date
1.4   LD July 17* 2018 NM 18 m  12.4 from 13.9 LD July 10 - 23 Earth passage uncertainty +/- 33 mins.*
9.36 LD Aug. 27 2018 LQ2 39 m  15.96 from 16.11 LD Aug. 17 - Sept. 6 NHATS target
4.22 LD Aug. 29 1998 SD9 49 m  156.50 from 161.73 LD Aug. 25 - Sept. 2

This report was generated at 2138 UTC with follow-up in today's DOU MPEC for outbound 2018 NJ and departed objects 441987 2010 NY65 and risk-listed 2018 NL as well as astrometry from May for 2018 JK2.



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 8 July '18

The MPC's NEO Confirmation Page has 27 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 27 objects listed. Of these, eighteen were "one nighters." So far The Tracking News has counted a total of 34 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 8 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.


MPEC 2018-N30 - "23:39 UT" - 2018 NU


<< DOU on 8 July '18 >>  MPEC 2018-N29 - "13:39 UT" - Daily Orbit Update


MPEC 2018-N28 - "11:50 UT" - 2018 NQ


MPEC 2018-N27 - "11:47 UT" - 2018 NS


MPEC 2018-N26 - "11:44 UT" - 2018 NR

Observers  on 8 July '18

A total of 37 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 6 in MPECs 2018-N28 & 2018-N29 -- 2018 NQ, 2018 NN, 2018 LO3, 2018 LG1, 2013 MR, 2003 RC2
T05ATLAS Haleakala in Hawaii, 4 in MPEC 2018-N29 -- 2018 NB, 2002 OS4, 99799, 18882
C77Bernezzo Obs. in Italy, 1 in MPEC 2018-N28 -- 2018 NQ
X74Campo dos Amarais Obs., 1 in MPEC 2018-N29 -- 4954
K51Celado Obs. in Italy, 1 in MPEC 2018-N28 -- 2018 NQ
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 17 in MPEC 2018-N29 -- 2018 MY6, 2018 MT6, 2018 MQ6, 2018 MK5, 2018 MH7, 2018 LS2, 2018 LN5, 2018 LJ1, 2018 KK2, 2018 JL, 2018 HS3, 2018 HJ, 2018 HH, 2018 GQ2, 2018 FQ5, 2018 DK3, 2018 BH6
K65Cesena Obs. in Italy, 1 in MPEC 2018-N28 -- 2018 NQ
K87Dettelbach Vineyard Obs. in Germany, 4 in MPECs 2018-N28 & 2018-N29 -- 2018 NQ, 2018 LF5, 2018 JL2, 2018 JK2
I19El Gato Gris Obs. in Argentina, 1 in MPEC 2018-N28 -- 2018 NQ
734Farpoint Obs. in Kansas, 4 in MPECs 2018-N26, 2018-N27, 2018-N28 & 2018-N29 -- 2018 NS, 2018 NR, 2018 NQ, 2018 LO6
J95Great Shefford Obs. in England, 3 in MPECs 2018-N28, 2018-N29 & 2018-N30 -- 2018 NU, 2018 NQ, 2018 NJ
A17Guidestar Obs. in Germany, 2 in MPECs 2018-N28 & 2018-N30 -- 2018 NU, 2018 NQ
W19Kalamazoo Obs. in Michigan, 2 in MPEC 2018-N29 -- 1627, 719
K38M57 Obs. in Italy, 2 in MPECs 2018-N28 & 2018-N29 -- 2018 NQ, 2018 MM8
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2018-N26, 2018-N27 & 2018-N29 -- 2018 NS, 2018 NR, 2018 GT1, 2014 US192, 86666, 504711, 37336, 278327, 155110, 136818, 3200, 1865
J69North Obs. in England, 1 in MPEC 2018-N28 -- 2018 NQ
Z80Northolt Branch Obs. in England, 1 in MPEC 2018-N28 -- 2018 NQ
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2018-N28 -- 2018 NQ
C23Olmen Obs. in Belgium, 2 in MPECs 2018-N28 & 2018-N29 -- 2018 NQ, 2018 NB
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2018-N29 -- 441987
I41Palomar Transient Factory (PTF) in southern California, 2 in MPECs 2018-N28 & 2018-N30 -- 2018 NU, 2018 NQ
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2018-N26 & 2018-N27 -- 2018 NS, 2018 NR
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2018-N29 -- 2002 OS4
B49Paus Obs. in Spain, 1 in MPEC 2018-N28 -- 2018 NQ
K81PMPHR Obs., 1 in MPEC 2018-N29 -- 7889
W98Polonia Obs. in Chile, 1 in MPEC 2018-N29 -- 25916
W71Rand II Obs. in New York, 1 in MPEC 2018-N28 -- 2018 NQ
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-N28 -- 2018 NQ
A29Santa Maria a Monte Obs. in Italy, 1 in MPEC 2018-N28 -- 2018 NQ
204Schiaparelli Obs. in Italy, 4 in MPECs 2018-N26, 2018-N27, 2018-N28 & 2018-N30 -- 2018 NU, 2018 NS, 2018 NR, 2018 NQ
587Sormano Obs. in Italy, 2 in MPECs 2018-N26 & 2018-N28 -- 2018 NR, 2018 NQ
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2018-N29 -- 2018 MC5
I52Steward Obs. Mt. Lemmon Station in Arizona, 2 in MPECs 2018-N26 & 2018-N28 -- 2018 NR, 2018 NQ
Z52The Studios Obs., 1 in MPEC 2018-N29 -- 13553
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2018-N29 -- 2015 DR215, 2015 BS4
L01Visnjan Obs., 4 in MPECs 2018-N26, 2018-N28 & 2018-N29 -- 2018 NR, 2018 NQ, 2018 NL, 2018 NC
C51WISE in Earth polar orbit, 1 in MPEC 2018-N29 -- 2018 LL2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 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 NSNEODyS17002023-2118261.1e-06-3.56-3.56n/aNEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2018-06-22.287 to 2018-07-08.203."
JPL Sentry13502023-2118102.11621e-08-5.48-5.510JPL: Computed at 06:01 today Pacific time based on 15 observations spanning 15.916 days (2018-Jun-22.286092 to 2018-Jul-08.20246). Diameter approximately 0.130 km. from weighted mean H=22.02.
2018 NLNEODyS21312057-2117643.36e-04-3.67-3.80NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2018-07-03.404 to 2018-07-07.333."
JPL Sentry17002057-2112277.06223758e-05-4.39-4.730JPL: Computed at 08:47 today Pacific time based on 16 observations spanning 3.9291 days (2018-Jul-03.40294 to 2018-Jul-07.33202). Diameter approximately 0.032 km. from weighted mean H=25.16.
2018 NJNEODyS21312076-21181017.12e-04-4.79-5.2n/aNEODyS: "Based on 29 optical observations (of which 1 are rejected as outliers) from 2018-07-05.276 to 2018-07-08.075."
JPL Sentry17002076-2117520.00051425001-4.91-4.940JPL: Computed at 08:55 today Pacific time based on 29 observations spanning 2.7998 days (2018-Jul-05.27485 to 2018-Jul-08.074667). Diameter approximately 0.009 km. from weighted mean H=27.76.
2018 MH7NEODyS2131208915.81e-07-7.21-7.210NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2018-06-23.553 to 2018-07-08.146."
JPL Sentry17002089-208911.542e-07-7.77-7.770JPL: Computed at 09:05 today Pacific time based on 15 observations spanning 14.593 days (2018-Jun-23.55228 to 2018-Jul-08.1451). Diameter approximately 0.019 km. from weighted mean H=26.24.
2018 MC5NEODyS21312054-2112113.73e-06-5.90-6.030NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2018-06-12.476 to 2018-07-08.439."
JPL Sentry17002095-211321.4186e-06-6.35-6.410JPL: Computed at 08:42 today Pacific time based on 42 observations spanning 25.963 days (2018-Jun-12.475331 to 2018-Jul-08.43791). Diameter approximately 0.031 km. from weighted mean H=25.16.

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 8 July '18

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

2358Grabbed MPEC 2018-N30 - 2018 NU - see above
2138Generated Traffic Report
2131Noted that NEODyS has updated its 2018 MC5 risk assessment - see above
Noted that NEODyS has updated its 2018 MH7 risk assessment - see above
Noted that NEODyS has updated its 2018 NJ risk assessment - see above
Noted that NEODyS has updated its 2018 NL risk assessment - see above
1700Noted that JPL Sentry has updated its 2018 MC5 risk assessment - see above
Noted that JPL Sentry has updated its 2018 MH7 risk assessment - see above
Noted that JPL Sentry has updated its 2018 NJ risk assessment - see above
Noted that JPL Sentry has updated its 2018 NL risk assessment - see above
Noted that NEODyS has posted 2018 NS as an impact risk - see above
Grabbed MPEC 2018-N29 - Daily Orbit Update - see above
1350Noted that JPL Sentry has posted 2018 NS as an impact risk - see above
Grabbed MPEC 2018-N26 - 2018 NR - see above
Grabbed MPEC 2018-N27 - 2018 NS - see above
Grabbed MPEC 2018-N28 - 2018 NQ - see above