Contents  on 12 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 12 July '18

Three objects reported inside ten LD

Three asteroids are known to be within ten lunar distances (LD) of our home world today. Nearest is intruder 2018 NX, which travels outward from 3.28 to 4.02 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  3.28 to 4.02 LD June 24 - July 21 intruder, NHATS target
1.40 LD July 17 2018 NM 18 m  6.48 from 7.95 LD July 10 - 23 NHATS target
2.37 LD July 7 2018 NJ 9 m  7.06 to 8.33 LD June 29 - July 14 NHATS target, risk
Approaching - sorted by 10-LD bubble entry date
9.36 LD Aug. 27 2018 LQ2 39 m  15.37 from 15.52 LD Aug. 17 - Sept. 6 NHATS target
4.22 LD Aug. 29 1998 SD9 49 m  137.32 from 141.88 LD Aug. 25 - Sept. 2

This report was generated at 2138 UTC with follow-up in today's DOU MPEC for departed objects 1999 FN19, 441987 2010 NY65, and risk-listed 2018 NL.



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 12 July '18

The MPC's NEO Confirmation Page has 69 listings

When last checked at 2311 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 69 objects listed. Of these, 46 were "one nighters." So far The Tracking News has counted a total of 85 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 12 July '18

Minor Planet Electronic Circulars

As of last check at 2311 UTC, there have been ten MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-N62 - "16:56 UT" - 2018 NE2


MPEC 2018-N61 - "16:52 UT" - 2018 NJ2


MPEC 2018-N60 - "16:48 UT" - 2018 NH2


MPEC 2018-N59 - "16:44 UT" - 2018 NG2


MPEC 2018-N58 - "16:40 UT" - 2018 NF2


<< DOU on 12 July '18 >>  MPEC 2018-N57 - "12:05 UT" - Daily Orbit Update


MPEC 2018-N56 - "10:42 UT" - 2018 NT1


MPEC 2018-N55 - "10:39 UT" - 2018 NW1


MPEC 2018-N54 - "10:36 UT" - 2018 NV1


MPEC 2018-N53 - "10:28 UT" - 2018 NU1

Observers  on 12 July '18

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2018-N60 -- 2018 NH2
H21Astronomical Research Obs. Westfield in Illinois, 10 in MPECs 2018-N53, 2018-N56, 2018-N57, 2018-N58, 2018-N59, 2018-N60 & 2018-N62 -- 2018 NU1, 2018 NT1, 2018 NQ, 2018 NH2, 2018 NG2, 2018 NF2, 2018 NE2, 2018 NB, 2018 NA, 2018 MJ7
T05ATLAS Haleakala in Hawaii, 20 in MPECs 2018-N57 & 2018-N60 -- 2018 NH2, 2018 NB, 2018 MR8, 99799, 68350, 518640, 495829, 441987, 438429, 220839, 18882, 15745, 14402, 139345, 7889, 7350, 5604, 2061, 1627, 719
T08ATLAS Mauna Loa in Hawaii, 4 in MPEC 2018-N57 -- 2018 GA5, 2001 SC170, 455550, 162483
X74Campo dos Amarais Obs., 1 in MPEC 2018-N57 -- 2061
160Castelmartini Obs. in Italy, 4 in MPEC 2018-N57 -- 2018 NV, 2018 NQ, 2014 NE3, 2011 GA62
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2018-N61 -- 2018 NJ2
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2018-N57 -- 2018 NW1
734Farpoint Obs. in Kansas, 4 in MPECs 2018-N53, 2018-N54, 2018-N56 & 2018-N62 -- 2018 NV1, 2018 NU1, 2018 NT1, 2018 NE2
K83Forti Obs., 1 in MPEC 2018-N57 -- 398188
K73Gravina Obs. in Italy, 1 in MPEC 2018-N57 -- 1627
J95Great Shefford Obs. in England, 3 in MPECs 2018-N55, 2018-N58 & 2018-N60 -- 2018 NW1, 2018 NH2, 2018 NF2
Q62iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-N57 -- 18109
Z43Landehen Obs., 3 in MPEC 2018-N57 -- 283729, 162168, 138847
474Mt. John Obs. in New Zealand, 5 in MPECs 2018-N57, 2018-N58, 2018-N59, 2018-N60 & 2018-N61 -- 2018 NW1, 2018 NJ2, 2018 NH2, 2018 NG2, 2018 NF2
I41Palomar Transient Factory (PTF) in southern California, 3 in MPEC 2018-N57 -- 2005 LA37, 53789, 189973
F51Pan-STARRS 1 (PS1) in Hawaii, 27 in MPECs 2018-N53, 2018-N54, 2018-N55, 2018-N57, 2018-N58, 2018-N59, 2018-N60, 2018-N61 & 2018-N62 -- 2018 NW1, 2018 NV1, 2018 NU1, 2018 NJ2, 2018 NH2, 2018 NG2, 2018 NF2, 2018 NE2, 2018 AL13, 2012 XS134, 2012 TM139, 2008 RT26, 508767, 399457, 326386, 317212, 289315, 267729, 267270, 264308, 243298, 163364, 162900, 140158, 136839, 6456, 5011
F52Pan-STARRS 2 (PS2) in Hawaii, 8 in MPECs 2018-N53 & 2018-N57 -- 2018 NU1, 2018 MS6, 2018 MR6, 2018 LM5, 2018 AP12, 2017 QP17, 338172, 7888
K63Pascoli Obs. in Italy, 1 in MPEC 2018-N58 -- 2018 NF2
D29Purple Mtn. Obs. Xuyi Station in China, 13 in MPEC 2018-N57 -- 2015 RB82, 1999 FN19, 469737, 444935, 414903, 31345, 18882, 154029, 139345, 9162, 7350, 7025, 5626
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-N58 -- 2018 NF2
204Schiaparelli Obs. in Italy, 1 in MPEC 2018-N58 -- 2018 NF2
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2018-N57 & 2018-N59 -- 2018 NG2, 2018 MQ5
I52Steward Obs. Mt. Lemmon Station in Arizona, 2 in MPECs 2018-N53 & 2018-N56 -- 2018 NU1, 2018 NT1
Z52The Studios Obs., 1 in MPEC 2018-N57 -- 13553
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 6 in MPECs 2018-N56 & 2018-N57 -- 2018 NT1, 2018 NL, 2018 MQ5, 2018 MC5, 2018 LV5, 2018 LB16
C51WISE in Earth polar orbit, 6 in MPECs 2018-N56 & 2018-N57 -- 2018 NT1, 2015 QM3, 443923, 152637, 140039, 1627
I15Wishing Star Obs. in Rhode Island, 2 in MPEC 2018-N57 -- 2015 BR514, 455550
E08Wobblesock Obs. in New South Wales, 1 in MPEC 2018-N60 -- 2018 NH2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 July '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2311 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 NWNEODyS17382046-21181112.96e-04-4.86-5.4n/aNEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2018-07-08.349 to 2018-07-10.365."
2018 NSNEODyS17382091-211541.02e-09-7.89-8.230NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2018-06-22.287 to 2018-07-10.361."
2018 NLNEODyS17382056-2117712.84e-04-3.75-3.850NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2018-07-03.404 to 2018-07-11.516."
JPL Sentry15052057-2112266.582851e-05-4.43-4.740JPL: Computed at 07:51 today Pacific time based on 18 observations spanning 8.1119 days (2018-Jul-03.40294 to 2018-Jul-11.514868). Diameter approximately 0.031 km. from weighted mean H=25.20.
2018 MH7NEODyS1331R E M O V E D-
2018 MC7NEODyS17382060-2117802.94e-05-5.19-5.280NEODyS: "Based on 33 optical observations (of which 1 are rejected as outliers) from 2018-06-21.395 to 2018-07-10.586."
2018 MC5NEODyS17382112-211621.66e-07-7.39-7.460NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2018-06-12.476 to 2018-07-11.521."
JPL Sentry15052116-211618.708e-08-7.66-7.660JPL: Computed at 07:48 today Pacific time based on 44 observations spanning 29.045 days (2018-Jun-12.475331 to 2018-Jul-11.52024). Diameter approximately 0.031 km. from weighted mean H=25.19.
2018 JG1NEODyS17382068-207721.51e-08-7.74-7.80NEODyS: "Based on 88 optical observations (of which 0 are rejected as outliers) from 2018-05-08.180 to 2018-07-10.603."

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 12 July '18

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

2138Generated Traffic Report
1738Noted that NEODyS has updated its 2018 JG1 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 updated its 2018 NL risk assessment - see above
Noted that NEODyS has updated its 2018 NS risk assessment - see above
Noted that NEODyS has updated its 2018 NW risk assessment - see above
Grabbed MPEC 2018-N58 - 2018 NF2 - see above
Grabbed MPEC 2018-N59 - 2018 NG2 - see above
Grabbed MPEC 2018-N60 - 2018 NH2 - see above
Grabbed MPEC 2018-N61 - 2018 NJ2 - see above
Grabbed MPEC 2018-N62 - 2018 NE2 - see above
1505Noted that JPL Sentry has updated its 2018 MC5 risk assessment - see above
Noted that JPL Sentry has updated its 2018 NL risk assessment - see above
1331Noted that NEODyS has removed 2018 MH7 as an impact risk - see above
Grabbed MPEC 2018-N53 - 2018 NU1 - see above
Grabbed MPEC 2018-N54 - 2018 NV1 - see above
Grabbed MPEC 2018-N55 - 2018 NW1 - see above
Grabbed MPEC 2018-N56 - 2018 NT1 - see above
Grabbed MPEC 2018-N57 - Daily Orbit Update - see above