Contents  on 17 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 17 March '18

Four objects reported inside ten LD

There are four minor objects reported inside ten lunar distances (LD) of our home world today. Nearest is risk-listed 2018 EB4, which is heading out from 2.62 to 5.28 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
0.56 LD March 14 2018 EZ2 17 m  6.07 to 8.15 LD March 9 - 18 intruder, risk
1.45 LD yesterday 2018 EB4 28 m  2.62 to 5.28 LD March 12 - 19 risk - DOU
3.93 LD tomorrow 2018 FE 8 m  4.23 from 5.82 LD March 15 - 21 NEW - MPEC
4.38 LD tomorrow 2018 ET1 18 m  4.39 from 4.70 LD March 11 - 24 NHATS target - DOU

This report was updated at 2223 UTC the discovery of inbound 2018 FE (MPEC). Your first neighborhood flying rocks traffic report was generated at 1911 UTC with the discoveries of two approaching objects: 2018 FB (MPEC) was announced today, and, from yesterday, 2018 EJ4 (MPEC). The latter won't be a close passer immediately but is on its way for a passage of about 5.8 LD around June 11th. (A half-dozen other known asteroids will enter our ten-LD traffic reporting "bubble" during that period and will be added to our reporting here soon.) Today's DOU MPEC has the recovery of distant 2012 XO134 and follow-up for approaching objects 2018 EV1 and 2018 DH1, inbound 2018 ET1, and outbound risk-listed 2018 EB4.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
7.73 LD March 22 2018 EV1 28 m  13.53 from 15.67 LD March 19 - 24 DOU
4.9   LD March 29* 2018 FB 66 m  23.2 from 25.1 LD March 25 - April 3 NEW, EPU +/- 2.62 hours* - MPEC
9.17 LD March 27 2018 DH1 214 m  32.19 from 35.40 LD March 26 - 28 DOU
6.2   LD April 1* 2018 EM4 27 m  20.7 from 22.0 LD March 26 - April 6 EPU +/- 5 mins.*, NHATS target
4.0   LD April 2* 2004 FG29 21 m  53.1 from 56.5 LD March 30 - April 5 EPU +/- 1.03 hours*
5.8   LD June 11* 2018 EJ4 175 m  113.4 from 115.0 LD June 5 - 16 NEW, EPU +/- 19.57 hours*, NHATS target - MPEC
* 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. "Distant" is used here to describe an object that has approached Earth within ten LD since A/CC began these traffic reports eleven years ago but is not currently coming so close. 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 17 March '18

The MPC's NEO Confirmation Page has 58 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 58 objects listed. Of these, 39 were "one nighters." So far The Tracking News has counted a total of 71 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 17 March '18

Minor Planet Electronic Circulars

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


MPEC 2018-F26 - "20:14 UT" - 2018 FD


MPEC 2018-F25 - "20:08 UT" - 2018 FE


MPEC 2018-F24 - "18:39 UT" - 2017 GQ5


MPEC 2018-F23 - "18:37 UT" - 2017 CO32


MPEC 2018-F22 - "18:35 UT" - 2005 FV2


MPEC 2018-F21 - "15:21 UT" - 2018 FB


MPEC 2018-F20 - "15:17 UT" - 2018 ER4


MPEC 2018-F19 - "15:14 UT" - 2018 EQ4


<< DOU on 17 Mar. '18 >>  MPEC 2018-F18 - "12:02 UT" - Daily Orbit Update


MPEC 2018-F17 - "03:44 UT" - 2018 EO4


MPEC 2018-F16 - "02:15 UT" - 2015 FE37


MPEC 2018-F15 - "02:13 UT" - 2007 EM


MPEC 2018-F14 - "02:11 UT" - 2005 OX

Observers  on 17 March '18

A total of 28 observers appear in today's MPECs.

CodeObserver / observatory
B37Ametlla del Valles Obs. in Spain, 2 in MPEC 2018-F18 -- 2018 AO18, 2015 XE352
E23Arcadia Obs. in New South Wales, 1 in MPEC 2018-F21 -- 2018 FB
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPECs 2018-F18 & 2018-F20 -- 2018 ER4, 2018 CV13, 2018 CA, 2017 UQ, 2016 AH8
T05ATLAS Haleakala in Hawaii, 11 in MPECs 2018-F14 & 2018-F18 -- 2018 DE2, 2018 BY2, 2005 OX, 163243, 152952, 13553, 5604, 4954, 1916, 1685, 1036
703Catalina Sky Survey (CSS) in Arizona, 28 in MPECs 2018-F18, 2018-F21 & 2018-F26 -- 2018 FD, 2018 FB, 2018 DY1, 2018 DX3, 2018 DH1, 2015 XE352, 2013 QH10, 2011 EC7, 2006 UF17, 2001 FA58, 511808, 511523, 509935, 505667, 443103, 434344, 40267, 388945, 385580, 38091, 172034, 162882, 154652, 14402, 142348, 137805, 12711, 8709
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2018-F19, 2018-F23 & 2018-F24 -- 2018 EQ4, 2017 GQ5, 2017 CO32
K87Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2018-F17 -- 2018 EO4
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 4 in MPECs 2018-F15, 2018-F16, 2018-F17 & 2018-F22 -- 2018 EO4, 2015 FE37, 2007 EM, 2005 FV2
K88GINOP-KHK in Hungary, 2 in MPECs 2018-F17 & 2018-F20 -- 2018 ER4, 2018 EO4
J95Great Shefford Obs. in England, 5 in MPECs 2018-F17, 2018-F18, 2018-F25 & 2018-F26 -- 2018 FE, 2018 FD, 2018 ET1, 2018 EO4, 2018 EA4
238Grorudalen Obs. in Norway, 2 in MPEC 2018-F18 -- 475967, 137925
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-F21 -- 2018 FB
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-F26 -- 2018 FD
932McCarthy Obs. in Connecticut, 1 in MPEC 2018-F18 -- 2018 DH1
G96Mt. Lemmon Survey (MLS) in Arizona, 29 in MPECs 2018-F17, 2018-F18, 2018-F20, 2018-F25 & 2018-F26 -- 2018 FE, 2018 FD, 2018 ER4, 2018 EO4, 2018 EA1, 2018 DB2, 2018 BA7, 2017 XH62, 2017 VH2, 2016 GZ215, 2015 XE352, 2014 DT110, 2013 GZ7, 2011 EC7, 1996 RY3, 96315, 54686, 496818, 496816, 456898, 388945, 376729, 358744, 172034, 162882, 154652, 143992, 8567, 6053
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2018-F18 -- 2016 CJ195
Z80Northolt Branch Obs. in England, 1 in MPEC 2018-F18 -- 1981
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2018-F14 -- 2005 OX
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2018-F26 -- 2018 FD
L04ROASTERR-1 in Romania, 4 in MPEC 2018-F18 -- 2018 EB4, 2018 DH1, 194126, 172034
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-F17 -- 2018 EO4
033Schwarzschild Obs. in Germany, 1 in MPEC 2018-F19 -- 2018 EQ4
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-F21 -- 2018 FB
691Spacewatch 0.9m telescope in Arizona, 11 in MPEC 2018-F18 -- 2018 EY3, 2018 EX, 2018 EV1, 2018 ER1, 2018 EM2, 2018 DX3, 2018 DA4, 2018 CE1, 2018 BY2, 2018 AG2, 12923
291Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2018-F18 -- 2018 EY, 2018 EK2, 2018 ED4, 2018 DX1, 2017 RP2, 2012 XO134, 2009 HD21, 2005 SC71
W34Squirrel Valley Obs. in North Carolina, 3 in MPEC 2018-F18 -- 2001 FA58, 411201, 152964
I52Steward Obs. Mt. Lemmon Station in Arizona, 6 in MPECs 2018-F18, 2018-F19, 2018-F20, 2018-F21, 2018-F25 & 2018-F26 -- 2018 FE, 2018 FD, 2018 FB, 2018 ER4, 2018 EQ4, 2018 DY1
C51WISE in Earth polar orbit, 1 in MPEC 2018-F19 -- 2018 EQ4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 March '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 EL4NEODyS14502089-210555.03e-09-8.66-8.70NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2018-03-14.211 to 2018-03-16.290."
2018 ED4JPL Sentry15352027-2115369.574436e-07-3.55-4.060JPL: Computed at 08:04 today Pacific time based on 22 observations spanning 5.9263 days (2018-Mar-10.30583 to 2018-Mar-16.23218). Diameter approximately 0.419 km. from weighted mean H=19.55.
NEODyS14502027-2112423.87e-07-3.68-4.140NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2018-03-10.307 to 2018-03-14.224."
2018 EB4JPL Sentry15352099-210323.20466e-06-5.86-5.870JPL: Computed at 08:07 today Pacific time based on 82 observations spanning 3.7107 days (2018-Mar-12.34928 to 2018-Mar-16.06002). Diameter approximately 0.028 km. from weighted mean H=25.41.
NEODyS14502077-211564.06e-06-5.77-5.780NEODyS: "Based on 68 optical observations (of which 0 are rejected as outliers) from 2018-03-12.350 to 2018-03-14.000."
2018 EA4JPL Sentry1535R E M O V E DJPL: Risk listing removed at 1501 UTC today
NEODyS1450209813.79e-09-7.74-7.740NEODyS: "Based on 34 optical observations (of which 3 are rejected as outliers) from 2018-03-12.253 to 2018-03-13.922."
2018 EV3NEODyS14502081-211367.74e-07-7.29-7.540NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2018-03-09.277 to 2018-03-13.338."
2018 EZ2NEODyS14502055-2118149.77e-06-5.75-5.83n/aNEODyS: "Based on 86 optical observations (of which 0 are rejected as outliers) from 2018-03-12.422 to 2018-03-13.596."
2018 EY2NEODyS14502031-2104251.2e-08-7.66-7.830NEODyS: "Based on 8 optical observations (of which 0 are rejected as outliers) from 2018-03-07.372 to 2018-03-07.516."
2018 DN4NEODyS14502023-203821.97e-07-7.02-7.030NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2018-02-26.251 to 2018-02-26.395."
2018 DO3NEODyS14502040-2115112.14e-08-9.49-9.780NEODyS: "Based on 63 optical observations (of which 0 are rejected as outliers) from 2018-02-17.284 to 2018-02-17.470."
2017 YO5NEODyS14502048-2117312.13e-05-5.60-5.940NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2017-12-25.453 to 2018-01-20.570."

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 17 March '18

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

2223Updated Traffic Report
2030Grabbed MPEC 2018-F25 - 2018 FE - see above
Grabbed MPEC 2018-F26 - 2018 FD - see above
1903Grabbed MPEC 2018-F22 - 2005 FV2 - see above
Grabbed MPEC 2018-F23 - 2017 CO32 - see above
Grabbed MPEC 2018-F24 - 2017 GQ5 - see above
1535Noted that JPL Sentry has removed 2018 EA4 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 EB4 risk assessment - see above
Noted that JPL Sentry has updated its 2018 ED4 risk assessment - see above
Grabbed MPEC 2018-F19 - 2018 EQ4 - see above
Grabbed MPEC 2018-F20 - 2018 ER4 - see above
Grabbed MPEC 2018-F21 - 2018 FB - see above
1450Noted that NEODyS has updated its 2017 YO5 risk assessment - see above
Noted that NEODyS has posted 2018 DN4 as an impact risk - see above
Noted that NEODyS has updated its 2018 DO3 risk assessment - see above
Noted that NEODyS has posted 2018 EA4 as an impact risk - see above
Noted that NEODyS has posted 2018 EB4 as an impact risk - see above
Noted that NEODyS has posted 2018 ED4 as an impact risk - see above
Noted that NEODyS has posted 2018 EL4 as an impact risk - see above
Noted that NEODyS has posted 2018 EV3 as an impact risk - see above
Noted that NEODyS has posted 2018 EY2 as an impact risk - see above
Noted that NEODyS has posted 2018 EZ2 as an impact risk - see above
Grabbed MPEC 2018-F18 - Daily Orbit Update - see above
0430Grabbed MPEC 2018-F14 - 2005 OX - see above
Grabbed MPEC 2018-F15 - 2007 EM - see above
Grabbed MPEC 2018-F16 - 2015 FE37 - see above
Grabbed MPEC 2018-F17 - 2018 EO4 - see above