Contents  on 6 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 6 July '18

Three objects reported inside ten LD

There are three small Solar-System bodies known to be less than ten lunar distances (LD) from our planet today. Nearest is newly announced risk-listed 2018 NJ, which enters Earth's sphere of gravitational influence, moving in from 2.75 to 2.37 LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 2.41, 5.0 & 10.0 LD boundaries
2.37 LD tomorrow 2018 NJ 10 m  2.37 from 2.75 LD June 29 - July 14 NEW, enters Earth SOI, risk - MPEC
2.78 LD July 4 2018 MB7 59 m  5.08 to 7.41 LD June 30 - July 8 DOU
6.01 LD June 29 2018 LR3 19 m  8.09 to 8.70 LD June 20 - July 8 NHATS target, risk
Approaching - sorted by 10-LD bubble entry date
9.36 LD Aug. 27 2018 LQ2 39 m  16.26 from 16.41 LD Aug. 17 - Sept. 6 NHATS target - DOU
4.22 LD Aug. 29 1998 SD9 49 m  167.14 from 172.75 LD Aug. 25 - Sept. 2

This report was generated at 1910 UTC with the discoveries of inbound 2018 NJ (MPEC) and just departed 2018 NH (MPEC, DOU), which buzzed the Moon at 0.43 LD on July 2nd an hour and five minutes after passing us at 1.13 LD. Today's DOU MPEC has follow-up for approaching 2018 LQ2, outbound 2018 MB7, and departed objects 2018 MG7, 2018 MJ, 441987 2010 NY65, and risk-listed 2018 LS5.



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 6 July '18

The MPC's NEO Confirmation Page has 10 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had ten objects listed. Of these, three were "one nighters." So far The Tracking News has counted a total of fifteen 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 6 July '18

Minor Planet Electronic Circulars

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


<< DOU on 6 July '18 >>  MPEC 2018-N20 - "12:06 UT" - Daily Orbit Update


MPEC 2018-N19 - "11:22 UT" - 2018 NJ


MPEC 2018-N18 - "00:54 UT" - Comet C/2018 N1 (Neowise)


MPEC 2018-N17 - "00:20 UT" - 2018 NH

Observers  on 6 July '18

A total of 30 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 11 in MPECs 2018-N17 & 2018-N20 -- 2018 NH, 2018 NB, 2018 MR6, 2018 MJ7, 2018 MJ, 2018 MB7, 2018 LF16, 2018 JG2, 2017 WL1, 2016 EE158, 2010 BB3
T05ATLAS Haleakala in Hawaii, 2 in MPECs 2018-N18 & 2018-N20 -- C/2018 N1, 138847
C77Bernezzo Obs. in Italy, 1 in MPEC 2018-N17 -- 2018 NH
U63Burnt Tree Hill Obs., 1 in MPEC 2018-N20 -- 2018 NH
X74Campo dos Amarais Obs., 1 in MPEC 2018-N18 -- C/2018 N1
703Catalina Sky Survey (CSS) in Arizona, 19 in MPEC 2018-N20 -- 2018 LF5, 2017 YE5, 99799, 86039, 68350, 518640, 518426, 469737, 441987, 408752, 302591, 190161, 189865, 18882, 15745, 7350, 3552, 2061, 719
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2018-N20 -- 2018 LG16
K65Cesena Obs. in Italy, 1 in MPEC 2018-N17 -- 2018 NH
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2018-N18 -- C/2018 N1
N55Corona Borealis Obs. in Tibet, 1 in MPEC 2018-N18 -- C/2018 N1
151Eschenberg Obs. in Switzerland, 1 in MPEC 2018-N17 -- 2018 NH
J95Great Shefford Obs. in England, 2 in MPECs 2018-N17 & 2018-N19 -- 2018 NJ, 2018 NH
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2018-N20 -- 2018 DX3
108Montelupo Obs. in Italy, 3 in MPEC 2018-N20 -- 2018 NB, 15745, 1627
G96Mt. Lemmon Survey (MLS) in Arizona, 19 in MPECs 2018-N17, 2018-N19 & 2018-N20 -- 2018 NJ, 2018 NH, 2018 MD7, 2018 LL2, 2015 BR514, 2013 RC21, 2013 EP41, 85804, 66391, 54401, 470310, 455550, 442742, 419472, 397237, 350988, 259802, 185853, 153415
F51Pan-STARRS 1 (PS1) in Hawaii, 14 in MPECs 2018-N17 & 2018-N20 -- 2018 NH, 2018 MS8, 2018 LQ2, 2018 LH16, 2018 LG16, 2018 LF16, 2017 NK, 2015 QM3, 455550, 398188, 302591, 162980, 154268, 719
F52Pan-STARRS 2 (PS2) in Hawaii, 3 in MPEC 2018-N20 -- 2015 MQ101, 469737, 887
K63Pascoli Obs. in Italy, 2 in MPECs 2018-N17 & 2018-N19 -- 2018 NJ, 2018 NH
B49Paus Obs. in Spain, 1 in MPEC 2018-N17 -- 2018 NH
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2018-N17 & 2018-N19 -- 2018 NJ, 2018 NH
H36Sandlot Obs. in Kansas, 1 in MPEC 2018-N17 -- 2018 NH
C95SATINO-1 in France, 1 in MPEC 2018-N17 -- 2018 NH
Y00SONEAR in Brazil, 1 in MPEC 2018-N20 -- 17274
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2018-N20 -- 2018 ME5, 2018 LP5
W34Squirrel Valley Obs. in North Carolina, 2 in MPECs 2018-N17 & 2018-N20 -- 2018 NH, 139345
I52Steward Obs. Mt. Lemmon Station in Arizona, 26 in MPECs 2018-N17, 2018-N19 & 2018-N20 -- 2018 NJ, 2018 NH, 2018 NE, 2018 ND, 2018 NC, 2018 NA, 2018 MW6, 2018 MS8, 2018 MR5, 2018 MK8, 2018 MG7, 2018 ME5, 2018 MD7, 2018 LZ5, 2018 LR6, 2018 LQ2, 2018 LN, 2018 LL5, 2018 LL2, 2018 LG5, 2018 LF5, 2018 LC16, 2018 LB16, 2017 MT8, 2016 PZ66, 2015 BP515
Z52The Studios Obs., 1 in MPEC 2018-N20 -- 13553
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-N20 -- 2018 LS5
L01Visnjan Obs., 1 in MPEC 2018-N17 -- 2018 NH
C51WISE in Earth polar orbit, 1 in MPEC 2018-N18 -- C/2018 N1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 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 NJNEODyS20302076-21181525.69e-04-4.87-5.31n/aNEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2018-07-05.276 to 2018-07-06.250."
JPL Sentry14122076-2117480.00044263356-4.96-4.990JPL: Computed at 05:33 today Pacific time based on 23 observations spanning .97425 days (2018-Jul-05.27485 to 2018-Jul-06.2491). Diameter approximately 0.010 km. from weighted mean H=27.72.
2018 LH16NEODyS20302029-207531.37e-09-6.70-6.760NEODyS: "Based on 7 optical observations (of which 0 are rejected as outliers) from 2018-06-15.557 to 2018-06-17.584."
2018 LG16NEODyS20302028-2116121.57e-07-3.71-3.910NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2018-06-15.476 to 2018-06-22.334."
JPL Sentry16022028-2116428.83222e-08-4.01-4.140JPL: Computed at 07:47 today Pacific time based on 11 observations spanning 6.8587 days (2018-Jun-15.47495 to 2018-Jun-22.33362). Diameter approximately 0.419 km. from weighted mean H=19.55.
2018 LF16NEODyS20302024-2105112.11e-09-5.86-5.940NEODyS: "Based on 6 optical observations (of which 0 are rejected as outliers) from 2018-06-14.502 to 2018-06-16.282."
JPL Sentry16022023-2117623.32282e-08-4.98-5.560JPL: Computed at 07:41 today Pacific time based on 6 observations spanning 1.7801 days (2018-Jun-14.50126 to 2018-Jun-16.281395). Diameter approximately 0.213 km. from weighted mean H=21.00.
2018 LS5NEODyS2030R E M O V E D-

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 6 July '18

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

2030Noted that NEODyS has posted 2018 LF16 as an impact risk - see above
Noted that NEODyS has posted 2018 LG16 as an impact risk - see above
Noted that NEODyS has posted 2018 LH16 as an impact risk - see above
Noted that NEODyS has removed 2018 LS5 as an impact risk - see above
Noted that NEODyS has posted 2018 NJ as an impact risk - see above
1910Generated Traffic Report
1602Noted that JPL Sentry has posted 2018 LF16 as an impact risk - see above
Noted that JPL Sentry has posted 2018 LG16 as an impact risk - see above
1412Noted that JPL Sentry has posted 2018 NJ as an impact risk - see above
Grabbed MPEC 2018-N17 - 2018 NH - see above
Grabbed MPEC 2018-N18 - Comet C/2018 N1 (Neowise) - see above
Grabbed MPEC 2018-N19 - 2018 NJ - see above
Grabbed MPEC 2018-N20 - Daily Orbit Update - see above