Contents  on 1 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 1 July '18

Three objects reported inside ten LD

Three minor objects are known to be within ten lunar distances (LD) of Earth today. Closest is risk-listed 2018 LR3, which is outbound from 6.11 to 6.31 LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 5.0 & 10.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
2.78 LD July 4 2018 MB7 60 m  6.78 from 9.21 LD June 30 - July 8 DOU
5.52 LD June 27 2018 MX4 14 m  7.99 to 9.36 LD June 23 - tomorrow
6.01 LD June 29 2018 LR3 19 m  6.11 to 6.31 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  16.99 from 17.14 LD Aug. 17 - Sept. 6 NHATS target - DOU
4.22 LD Aug. 29 1998 SD9 49 m  197.35 from 204.09 LD Aug. 25 - Sept. 2

This report was generated at 1822 UTC with follow-up in today's DOU MPEC for approaching 2018 LQ2, inbound 2018 MB7, and departed objects 2018 MG7, 2018 MC7 (risk listed), 441987 2010 NY65, and 68347 2001 KB67.

Editor's note:  Please note that news pages here 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.



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 1 July '18

The MPC's NEO Confirmation Page has 13 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had thirteen objects listed. Of these, two were "one nighters." The Tracking News counted a total of 20 listings on the NEOCP on this day.

New MPECs  on 1 July '18

Minor Planet Electronic Circulars

There were four MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-N04 - "23:57 UT" - Comet P/2018 L5 (Leonard)


MPEC 2018-N03 - "17:12 UT" - 2018 MO8


MPEC 2018-N02 - "17:03 UT" - 2018 MP8


<< DOU on 1 July '18 >>  MPEC 2018-N01 - "12:03 UT" - Daily Orbit Update

Observers  on 1 July '18

A total of 26 observers appeared in this day's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 10 in MPECs 2018-N01 & 2018-N02 -- 2018 MP8, 2018 LF3, 2018 LE3, 2018 JZ2, 2018 JS1, 2018 GM4, 2016 LE51, 518507, 143637, 2135
T05ATLAS Haleakala in Hawaii, 11 in MPEC 2018-N01 -- 2018 LF5, 68950, 68350, 68347, 66391, 518635, 455550, 441987, 439313, 15745, 13553
T08ATLAS Mauna Loa in Hawaii, 10 in MPEC 2018-N01 -- 67367, 66400, 469737, 25916, 220839, 153957, 139345, 5646, 1916, 1685
I47Auger Obs. in Argentina, 1 in MPEC 2018-N04 -- P/2018 L5
C77Bernezzo Obs. in Italy, 2 in MPEC 2018-N01 -- 2018 MB7, 2018 LF5
W96Campo Catino Austral Obs. in Chile, 1 in MPEC 2018-N04 -- P/2018 L5
160Castelmartini Obs. in Italy, 14 in MPEC 2018-N01 -- 2018 MB7, 2015 BR514, 2011 GA62, 68950, 65996, 469737, 441987, 415029, 398188, 283729, 162168, 139345, 13553, 7889
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2018-N02 -- 2018 MP8
J95Great Shefford Obs. in England, 4 in MPEC 2018-N01 -- 2018 MY6, 2018 MM8, 2018 MG7, 2018 MB7
U695Hidetaka Sato in Japan via iTelescope Obs. Auberry in northern California, 1 in MPEC 2018-N02 -- 2018 MP8
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-N04 -- P/2018 L5
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 7 in MPEC 2018-N01 -- 2018 MB7, 2018 LO3, 2018 LF3, 2018 LE4, 2018 GA, 2018 EB, 2017 YZ1
K38M57 Obs. in Italy, 2 in MPEC 2018-N01 -- 2018 MG7, 68347
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2018-N03 & 2018-N04 -- 2018 MO8, P/2018 L5
J43Oukaimeden Obs. in Morocco, 2 in MPEC 2018-N01 -- 2017 YE5, 68350
I41Palomar Transient Factory in southern California, 1 in MPEC 2018-N04 -- P/2018 L5
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2018-N01, 2018-N02 & 2018-N03 -- 2018 MP8, 2018 MO8, 25916, 24475, 153957
K81PMPHR Obs., 1 in MPEC 2018-N01 -- 25916
H36Sandlot Obs. in Kansas, 2 in MPECs 2018-N03 & 2018-N04 -- 2018 MO8, P/2018 L5
204Schiaparelli Obs. in Italy, 9 in MPECs 2018-N01 & 2018-N03 -- 2018 MO8, 2018 LQ3, 2018 LQ2, 2018 LG, 2018 LD4, 2018 KM1, 2018 KL2, 2018 KC3, 2018 JL
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-N04 -- P/2018 L5
691Spacewatch 0.9m telescope in Arizona, 10 in MPECs 2018-N01, 2018-N02 & 2018-N04 -- 2018 MY6, 2018 MW6, 2018 MP8, 2018 MJ7, 2018 MD7, 2018 LQ6, 2018 LM4, 2018 LG, 2018 LF5, P/2018 L5
291Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2018-N01, 2018-N02, 2018-N03 & 2018-N04 -- 2018 MP8, 2018 MO8, 2018 MC7, 2018 LN, 2018 LL5, P/2018 L5, 2018 KF3, 2018 FS3, 2009 UP1, 2004 RX10
I52Steward Obs. Mt. Lemmon Station in Arizona, 38 in MPECs 2018-N01, 2018-N02, 2018-N03 & 2018-N04 -- 2018 MY6, 2018 MW6, 2018 MQ5, 2018 MP8, 2018 MO8, 2018 MJ7, 2018 MG7, 2018 MF5, 2018 ME7, 2018 MD7, 2018 LZ5, 2018 LX15, 2018 LW5, 2018 LR6, 2018 LQ2, 2018 LO6, 2018 LO5, 2018 LN, 2018 LM4, 2018 LL5, 2018 LL2, 2018 LG5, 2018 LG, 2018 LE3, 2018 LC16, P/2018 L5, 2018 KR2, 2018 KL2, 2018 KG1, 2018 KF3, 2018 KB1, 2018 JD2, 2018 FS3, 2018 FS1, 2018 FO5, 2018 BY2, 2013 VD13, 1998 MW5
L01Visnjan Obs., 2 in MPECs 2018-N02 & 2018-N04 -- 2018 MP8, P/2018 L5
I15Wishing Star Obs. in Rhode Island, 2 in MPEC 2018-N01 -- 2018 LF5, 1627
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 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 MD7NEODyS2037R E M O V E D-
2018 MC7NEODyS20372060-21151206.54e-05-4.80-5.140NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2018-06-21.395 to 2018-07-01.448."
JPL Sentry15002060-2115390.000226272642-4.26-4.540JPL: Computed at 07:37 today Pacific time based on 28 observations spanning 10.053 days (2018-Jun-21.39443 to 2018-Jul-01.44718). Diameter approximately 0.023 km. from weighted mean H=25.88.

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 1 July '18

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

0100 7/2Grabbed MPEC 2018-N04 - Comet P/2018 L5 (Leonard) - see above
2037Noted that NEODyS has updated its 2018 MC7 risk assessment - see above
Noted that NEODyS has removed 2018 MD7 as an impact risk - see above
1822Generated Traffic Report
1810Grabbed MPEC 2018-N02 - 2018 MP8 - see above
Grabbed MPEC 2018-N03 - 2018 MO8 - see above
1500Noted that JPL Sentry has updated its 2018 MC7 risk assessment - see above
1300Grabbed MPEC 2018-N01 - Daily Orbit Update - see above