Contents  on 16 March '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 16 March '18

Five objects reported inside ten LD

There are five planetesimals known to be less than ten lunar distances (LD) from Earth today. Nearest is risk-listed 2018 EB4, which comes its closest to Earth this time around, reaching 1.45 LD at 0559 UTC, and also its closest to the Moon -- 1.58 LD at 1329 UTC.

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
0.56 LD March 14 2018 EZ2 17 m  4.00 to 6.07 LD March 9 - 18 intruder, risk - DOU
1.45 LD today 2018 EB4 28 m  1.45 LD March 12 - 19 Earth closest at 0559 UTC, Moon
closest 1.58 LD at 1329 UTC, risk
4.38 LD March 18 2018 ET1 18 m  4.70 from 5.35 LD March 11 - 24 NHATS target
4.96 LD March 9 2018 EF4 20 m  9.90 to 11.03 LD March 2 - 16 exits ten LD
9.19 LD yesterday 2018 EH 47 m  9.35 to 10.10 LD March 13 - 16 exits ten LD

This report was updated at 2232 UTC to add returning 2004 FG29 to this reporting, since its passage will overlap with that of newly announced 2018 EM4. It hasn't been reported observed since its discovery apparition in 2004 and is just now becoming bright enough to be picked up by larger telescopes used for NEO discovery and tracking. Previously, this report was updated at 2042 UTC with the discovery of approaching 2018 EM4 (MPEC). Your first local asteroids traffic report was generated at 1652 UTC with today's DOU MPEC having astrometry for outbound risk-listed intruder 2018 EZ2 and continuing follow-up for approaching 2018 DH1 and departed 2018 ED1.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
7.69 LD March 22 2018 EV1 27 m  15.59 from 17.83 LD March 19 - 24
9.17 LD March 27 2018 DH1 214 m  35.39 from 38.64 LD March 26 - 28 DOU
6.2   LD April 1* 2018 EM4 27 m  22.0 from 23.4 LD March 26 - April 6 NEW, EPU +/- 5 mins.* - MPEC
4.0   LD April 2* 2004 FG29 21 m  56.5 from 60.0 LD March 30 - April 5 NEW, EPU +/- 1.03 hours*
* 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 16 March '18

The MPC's NEO Confirmation Page has 42 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 42 objects listed. Of these, 33 were "one nighters." So far The Tracking News has counted a total of 53 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 16 March '18

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been thirteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-F13 - "19:33 UT" - 2018 DO4


MPEC 2018-F12 - "19:27 UT" - 2018 EN4


MPEC 2018-F11 - "18:45 UT" - Comet C/2018 E2 (Barros)


MPEC 2018-F10 - "18:37 UT" - Comet C/2018 E1 (ATLAS)


MPEC 2018-F09 - "18:01 UT" - 2018 EK4


MPEC 2018-F08 - "17:58 UT" - 2018 EM4


MPEC 2018-F07 - "17:55 UT" - 2018 EL4


MPEC 2018-F06 - "17:52 UT" - 2018 EJ4


MPEC 2018-F05 - "17:48 UT" - 2018 EH4


MPEC 2018-F04 - "17:45 UT" - 2018 EG4


MPEC 2018-F03 - "17:38 UT" - 2015 EL7


MPEC 2018-F02 - "17:36 UT" - 2011 UH20


<< DOU on 16 Mar. '18 >>  MPEC 2018-F01 - "12:03 UT" - Daily Orbit Update

Observers  on 16 March '18

A total of 46 observers appear in today's MPECs.

CodeObserver / observatory
C97Al-Fulaij Obs., 1 in MPEC 2018-F01 -- 1981
E23Arcadia Obs. in New South Wales, 1 in MPEC 2018-F10 -- C/2018 E1
H21Astronomical Research Obs. Westfield in Illinois, 12 in MPECs 2018-F01, 2018-F04, 2018-F05, 2018-F06, 2018-F07, 2018-F08, 2018-F09 & 2018-F12 -- 2018 EZ2, 2018 EN4, 2018 EM4, 2018 EL4, 2018 EK4, 2018 EJ4, 2018 EH4, 2018 EG4, 2018 CQ1, 2018 BL5, 2008 EQ7, 513489
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2018-F10 -- C/2018 E1
I47Auger Obs. in Argentina, 2 in MPECs 2018-F10 & 2018-F11 -- C/2018 E2, C/2018 E1
W96Campo Catino Austral Obs. (CAO) in Chile, 2 in MPECs 2018-F10 & 2018-F11 -- C/2018 E2, C/2018 E1
K51Celado Obs. in Italy, 1 in MPEC 2018-F05 -- 2018 EH4
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPECs 2018-F01, 2018-F04, 2018-F10, 2018-F11 & 2018-F12 -- 2018 EN4, 2018 EG4, 2018 ED1, C/2018 E2, C/2018 E1, 2018 DJ4
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2018-F10 -- C/2018 E1
K87Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2018-F01 -- 2018 CX13
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 3 in MPECs 2018-F03, 2018-F05 & 2018-F08 -- 2018 EM4, 2018 EH4, 2015 EL7
006Fabra Obs. in Spain, 2 in MPEC 2018-F01 -- 3752, 1981
734Farpoint Obs. in Kansas, 2 in MPECs 2018-F05 & 2018-F06 -- 2018 EJ4, 2018 EH4
E10*program code "*" (19) via Faulkes Telescope South in New South Wales, 1 in MPEC 2018-F10 -- C/2018 E1
X31Galilei Obs., 1 in MPEC 2018-F10 -- C/2018 E1
K88GINOP-KHK in Hungary, 2 in MPECs 2018-F05 & 2018-F07 -- 2018 EL4, 2018 EH4
E94Gisborne Obs. in New Zealand, 1 in MPEC 2018-F10 -- C/2018 E1
J95Great Shefford Obs. in England, 1 in MPEC 2018-F05 -- 2018 EH4
238Grorudalen Obs. in Norway, 2 in MPEC 2018-F01 -- 137925, 3752
H15ISON New Mexico Obs. in New Mexico, 3 in MPEC 2018-F01 -- 2018 DH1, 2015 XE352, 115052
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-F13 -- 2018 DO4
Q62iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-F10 -- C/2018 E1
Q620Ernesto Guido in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-F10 -- C/2018 E1
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 3 in MPECs 2018-F10, 2018-F11 & 2018-F12 -- 2018 EN4, C/2018 E2, C/2018 E1
Q622Marian Urbanik in Slovakia via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-F10 -- C/2018 E1
Q623Rolando Ligustri in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-F10 -- C/2018 E1
Q62;Mike Mattiazzo in Victoria via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-F10 -- C/2018 E1
Q62[M. Suzuki in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-F10 -- C/2018 E1
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-F05 -- 2018 EH4
K22Les Barres Obs. in France, 1 in MPEC 2018-F01 -- 1627
474Mt. John Obs. in New Zealand, 3 in MPECs 2018-F10, 2018-F11 & 2018-F12 -- 2018 EN4, C/2018 E2, C/2018 E1
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2018-F05, 2018-F06, 2018-F07, 2018-F08, 2018-F09 & 2018-F13 -- 2018 EM4, 2018 EL4, 2018 EK4, 2018 EJ4, 2018 EH4, 2018 DO4
K74Muensterschwarzach Obs. in Germany, 2 in MPEC 2018-F01 -- 2018 DH1, 1981
F51Pan-STARRS 1 (PS1) in Hawaii, 4 in MPECs 2018-F04, 2018-F05, 2018-F08 & 2018-F10 -- 2018 EM4, 2018 EH4, 2018 EG4, C/2018 E1
K63Pascoli Obs. in Italy, 1 in MPEC 2018-F07 -- 2018 EL4
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2018-F01 -- 2018 DJ
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2018-F13 -- 2018 DO4
L04ROASTERR-1 in Romania, 1 in MPEC 2018-F01 -- 2018 EE
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-F07 -- 2018 EL4
204Schiaparelli Obs. in Italy, 2 in MPECs 2018-F05 & 2018-F12 -- 2018 EN4, 2018 EH4
033Schwarzschild Obs. in Germany, 2 in MPECs 2018-F05 & 2018-F06 -- 2018 EJ4, 2018 EH4
G40"G. Gasparovic in Croatia via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-F01 -- 2015 XE352
W883B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 1 in MPEC 2018-F10 -- C/2018 E1
Y00SONEAR in Brazil, 2 in MPECs 2018-F10 & 2018-F11 -- C/2018 E2, C/2018 E1
587Sormano Obs. in Italy, 3 in MPECs 2018-F05, 2018-F07 & 2018-F09 -- 2018 EL4, 2018 EK4, 2018 EH4
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2018-F12 -- 2018 EN4
W34Squirrel Valley Obs. in North Carolina, 2 in MPEC 2018-F01 -- 140039, 138013
I52Steward Obs. Mt. Lemmon Station in Arizona, 7 in MPECs 2018-F05, 2018-F06, 2018-F07, 2018-F08, 2018-F09, 2018-F12 & 2018-F13 -- 2018 EN4, 2018 EM4, 2018 EL4, 2018 EK4, 2018 EJ4, 2018 EH4, 2018 DO4
B18Terskol Obs. in Russia, 1 in MPEC 2018-F01 -- 2018 DH1
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-F02 -- 2011 UH20
T09UH/Tholen NEO Follow-Up Subaru Telescope in Hawaii, 1 in MPEC 2018-F02 -- 2011 UH20
C51WISE in Earth polar orbit, 1 in MPEC 2018-F12 -- 2018 EN4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 March '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2359 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 Sentry21002053-2118151.7558675e-06-6.09-6.320JPL: Computed at 13:36 today Pacific time based on 33 observations spanning 2.0796 days (2018-Mar-14.20994 to 2018-Mar-16.28958). Diameter approximately 0.035 km. from weighted mean H=24.91.
2018 EZ2JPL Sentry15362056-210585.64988e-06-5.99-6.060JPL: Computed at 07:58 today Pacific time based on 86 observations spanning 1.1748 days (2018-Mar-12.42083 to 2018-Mar-13.59564). Diameter approximately 0.017 km. from weighted mean H=26.53.

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 16 March '18

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

2232Updated Traffic Report
2100Noted that JPL Sentry has posted 2018 EL4 as an impact risk - see above
2000Grabbed MPEC 2018-F12 - 2018 EN4 - see above
Grabbed MPEC 2018-F13 - 2018 DO4 - see above
1900Grabbed MPEC 2018-F10 - Comet C/2018 E1 (ATLAS) - see above
Grabbed MPEC 2018-F11 - Comet C/2018 E2 (Barros) - see above
1830Grabbed MPEC 2018-F02 - 2011 UH20 - see above
Grabbed MPEC 2018-F03 - 2015 EL7 - see above
Grabbed MPEC 2018-F04 - 2018 EG4 - see above
Grabbed MPEC 2018-F05 - 2018 EH4 - see above
Grabbed MPEC 2018-F06 - 2018 EJ4 - see above
Grabbed MPEC 2018-F07 - 2018 EL4 - see above
Grabbed MPEC 2018-F08 - 2018 EM4 - see above
Grabbed MPEC 2018-F09 - 2018 EK4 - see above
1536Noted that JPL Sentry has updated its 2018 EZ2 risk assessment - see above
Grabbed MPEC 2018-F01 - Daily Orbit Update - see above