Contents  on 2 April '18

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 2 April '18

Five objects reported inside ten LD

Five asteroidal objects are reported within ten lunar distances (LD) of our home world today. Nearest may be 2004 FG29, which is calculated to come its closest to Earth on this passage -- 4.0 LD at 1344 UTC, but with an uncertainty of plus-or-minus 1.03 hours.

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
0.39 LD March 30 2018 FK5 7 m  6.21 to 8.75 LD March 26 - tomorrow intruder, risk
4.0   LD today* 2004 FG29 21 m  4.0 LD March 30 - April 5 EPU +/- 1.03 hours*, Earth closest at 1344 UTC
4.88 LD March 29 2018 FB 54 m  7.65 to 9.18 LD March 25 - tomorrow DOU
6.23 LD yesterday 2018 EM4 30 m  6.32 to 6.69 LD March 26 - April 6 NHATS target
7.69 LD March 28 2018 FO4 11 m  9.64 to 10.54 LD March 24 - today NHATS target, exits ten LD

This report was updated at 2122 UTC with new discovery 2018 FP5 (MPEC), which flew past us at 3.03 LD on March 24th. Your first neighborhood flying rocks traffic report was generated at 1922 UTC with follow-up in today's DOU MPEC for outbound 2018 FB and approaching 2018 EJ4.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
9.73 LD April 5 2018 FW4 33 m  11.17 from 12.67 LD April 4 - 5
9.24 LD April 14 2014 UR 16 m  14.51 from 15.27 LD April 10 - 18 NHATS target
6.2   LD May 8* 2016 JQ5 8 m  91.2 from 94.2 LD May 4 - 11 EPU +/- 14.00 hours*
9.65 LD May 7 1999 FN19 112 m  43.29 from 44.45 LD May 5 - 9 radar/NHATS target
6.48 LD May 9 388945 2008 TZ3 282 m  80.44 from 82.97 LD May 5 - 13
9.50 LD May 29 68347 2001 KB67 371 m  206.95 from 212.04 LD May 28 - 30 radar target
5.6   LD June 10* 2018 EJ4 181 m  89.8 from 91.1 LD June 4 - 16 EPU +/- 45 mins.*, radar/NHATS target - DOU
8.96 LD June 11 2015 DP155 162 m  57.36 from 58.06 LD June 6 - 15 NHATS target
* EPU = Earth passage uncertainty



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 2 April '18

The MPC's NEO Confirmation Page has 9 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had nine objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of fourteen 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 2 April '18

Minor Planet Electronic Circulars

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


MPEC 2018-G15 - "19:27 UT" - 2018 FQ5


MPEC 2018-G14 - "19:24 UT" - 2018 FP5


MPEC 2018-G13 - "19:21 UT" - 2018 FO5


MPEC 2018-G12 - "17:59 UT" - 2017 FQ161


MPEC 2018-G11 - "17:57 UT" - 2017 FP161


MPEC 2018-G10 - "17:55 UT" - 2017 FO161


MPEC 2018-G09 - "17:52 UT" - 2017 DP121


MPEC 2018-G08 - "17:50 UT" - 2017 DO121


MPEC 2018-G07 - "17:47 UT" - 2017 DN121


MPEC 2018-G06 - "17:45 UT" - 2017 DM121


MPEC 2018-G05 - "17:42 UT" - 2016 TS97


MPEC 2018-G04 - "17:09 UT" - 2014 FD70


MPEC 2018-G03 - "17:08 UT" - 2014 FO69


<< DOU on 2 Apr. '18 >>  MPEC 2018-G02 - "12:01 UT" - Daily Orbit Update

Observers  on 2 April '18

A total of 24 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2018-G14 -- 2018 FP5
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2018-G13 & 2018-G15 -- 2018 FQ5, 2018 FO5
T05ATLAS Haleakala in Hawaii, 3 in MPEC 2018-G02 -- 513497, 163243, 1036
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2018-G02 -- 514568
160Castelmartini Obs. in Italy, 7 in MPEC 2018-G02 -- 2018 FB, 36284, 333888, 172034, 9856, 3122, 1981
703Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2018-G02 & 2018-G14 -- 2018 FP5, 515049, 514568
V06Catalina Sky Survey Kuiper Telescope in Arizona, 1 in MPEC 2018-G13 -- 2018 FO5
107Cavezzo Obs. in Italy, 1 in MPEC 2018-G02 -- 9856
807.Scott Sheppard via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2018-G05, 2018-G10, 2018-G11 & 2018-G12 -- 2017 FQ161, 2017 FP161, 2017 FO161, 2016 TS97
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2018-G13 & 2018-G14 -- 2018 FP5, 2018 FO5
G37Discovery Channel Telescope (DCT) in Arizona, 6 in MPECs 2018-G06, 2018-G07, 2018-G09, 2018-G10, 2018-G11 & 2018-G12 -- 2017 FQ161, 2017 FP161, 2017 FO161, 2017 DP121, 2017 DN121, 2017 DM121
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-G15 -- 2018 FQ5
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-G15 -- 2018 FQ5
304Las Campanas Obs. in Chile, 8 in MPECs 2018-G03, 2018-G04, 2018-G05, 2018-G08, 2018-G09, 2018-G10, 2018-G11 & 2018-G12 -- 2017 FQ161, 2017 FP161, 2017 FO161, 2017 DP121, 2017 DO121, 2016 TS97, 2014 FO69, 2014 FD70
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2018-G13 -- 2018 FO5
5685Scott Sheppard on Mauna Kea in Hawaii, 4 in MPECs 2018-G06, 2018-G07, 2018-G08 & 2018-G09 -- 2017 DP121, 2017 DO121, 2017 DN121, 2017 DM121
900Moriyama Obs. in Japan, 1 in MPEC 2018-G14 -- 2018 FP5
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2018-G02, 2018-G13 & 2018-G15 -- 2018 FQ5, 2018 FO5, 515010
K74Muensterschwarzach Obs. in Germany, 1 in MPEC 2018-G15 -- 2018 FQ5
608NEAT's USAF Haleakala telescope in Hawaii, 4 in MPEC 2018-G02 -- 427684, 387733, 338292, 329437
A53Peschiera del Garda Obs. in Italy, 2 in MPEC 2018-G02 -- 2018 DX3, 2015 XE352
A48Povegliano Veronese Obs. in Italy, 2 in MPEC 2018-G02 -- 2018 BY2, 2015 XE352
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2018-G02 -- 2018 FD1
I52Steward Obs. Mt. Lemmon Station in Arizona, 3 in MPECs 2018-G13, 2018-G14 & 2018-G15 -- 2018 FQ5, 2018 FP5, 2018 FO5
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 8 in MPEC 2018-G02 -- 2018 FY4, 2018 FP4, 2018 FJ2, 2018 EJ4, 2018 DF2, 2018 CK14, 2018 AL13, 2017 XJ62
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 April '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 EL4JPL Sentry15492110-211027.114e-07-6.66-6.760JPL: Computed at 08:35 today Pacific time based on 68 observations spanning 16.182 days (2018-Mar-14.20994 to 2018-Mar-30.392206). Diameter approximately 0.032 km. from weighted mean H=25.14.

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 2 April '18

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

2122Updated Traffic Report
1942Grabbed MPEC 2018-G13 - 2018 FO5 - see above
Grabbed MPEC 2018-G14 - 2018 FP5 - see above
Grabbed MPEC 2018-G15 - 2018 FQ5 - see above
1910Grabbed MPEC 2018-G03 - 2014 FO69 - see above
Grabbed MPEC 2018-G04 - 2014 FD70 - see above
Grabbed MPEC 2018-G05 - 2016 TS97 - see above
Grabbed MPEC 2018-G06 - 2017 DM121 - see above
Grabbed MPEC 2018-G07 - 2017 DN121 - see above
Grabbed MPEC 2018-G08 - 2017 DO121 - see above
Grabbed MPEC 2018-G09 - 2017 DP121 - see above
Grabbed MPEC 2018-G10 - 2017 FO161 - see above
Grabbed MPEC 2018-G11 - 2017 FP161 - see above
Grabbed MPEC 2018-G12 - 2017 FQ161 - see above
1549Noted that JPL Sentry has updated its 2018 EL4 risk assessment - see above
Grabbed MPEC 2018-G02 - Daily Orbit Update - see above