Contents  on 13 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 13 March '18

Eight objects reported inside ten LD

Bulletin - 2304, updated 2327, 2358 UTC:  Three new discoveries of close passers have been announced. These will be added to the next traffic report.

Earth passageI D~Size~Inside ten LDNotes
1.45 LD at 0559 March 162018 EB427 m yesterday - March 20MPEC
2.02 LD at 0144 March 62018 EV313 m March 2 - 10MPEC
8.75 LD at 0820 March 32018 ET316 m Feb. 27 - March 7MPEC


Eight minor planets are reported inside ten lunar distances (LD) of our planet today. The nearest is newly announced risk-listed intruder 2018 EZ2, which enters the Earth-Moon system, coming in from 2.40 to 0.61 LD from Earth.

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 tomorrow 2018 EZ2 17 m  0.61 from 2.40 LD March 9 - 18 NEW, intruder today, inside Earth SOI, risk - MPEC
3.32 LD March 4 2018 DC4 11 m  7.89 to 8.69 LD Feb. 22 - March 15 NHATS target
3.76 LD March 7 2017 VR12 257 m  8.82 to 10.11 LD Feb. 28 - today radar/NHATS target, exits ten LD - DOU
4.18 LD Feb. 27 2018 DT 13 m  8.98 to 9.47 LD Feb. 11 - March 15 NHATS target
4.37 LD March 18 2018 ET1 18 m  7.23 from 8.35 LD March 11 - 24 NHATS target - DOU
5.26 LD March 11 2018 DY3 20 m  6.26 to 7.39 LD March 6 - 15 NHATS target
7.02 LD March 10 2015 DK200 26 m  8.56 to 9.71 LD March 6 - 14 NHATS target
9.19 LD March 15 2018 EH 47 m  9.72 from 10.78 LD today - March 16 enters ten LD - DOU

This report was generated at 1846 UTC with the discovery of risk-listed inbound intruder 2018 EZ2 (MPEC), and also the February 26th discovery of now departed risk-listed intruder 2018 DN4 (DOU), which passed Earth a couple days earlier at about 0.6 LD* (+/- 1.57 hours uncertainty). Today's DOU MPEC has first follow-up for inbound 2018 ET1 and continuing follow-up for approaching 2018 DH1, inbound 2018 EH, outbound 2017 VR12, and departed 2018 EW1, plus January observation of risk-listed 2017 YO5 that adds 22.01 days to its previous 4.11-day observing arc.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
7.7   LD March 22* 2018 EV1 28 m  22.5 from 24.9 LD March 19 - 24 EPU +/- 31 mins.*
9.17 LD March 27 2018 DH1 214 m  45.26 from 48.61 LD March 26 - 28 DOU
* EPU = Earth passage uncertainty


<< Reading:  The Moscow Institute of Physics and Technology has a news item today about modeling "the impact of a nuclear explosion on an Earth-threatening asteroid" by blasting miniature model objects with a laser.



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 13 March '18

The MPC's NEO Confirmation Page has 29 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 29 objects listed. Of these, seventeen were "one nighters." So far The Tracking News has counted a total of 47 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 13 March '18

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been 23 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-E101 - "23:10 UT" - 2018 EA4


MPEC 2018-E100 - "23:06 UT" - 2018 EV3


MPEC 2018-E99 - "23:02 UT" - 2018 ET3


MPEC 2018-E98 - "22:59 UT" - 2018 EB4


MPEC 2018-E97 - "22:56 UT" - 2018 EZ3


MPEC 2018-E96 - "22:53 UT" - 2018 EY3


MPEC 2018-E95 - "22:50 UT" - 2018 EX3


MPEC 2018-E94 - "22:46 UT" - 2018 EW3


MPEC 2018-E93 - "22:42 UT" - 2018 EU3


MPEC 2018-E92 - "22:39 UT" - 2018 ES3


MPEC 2018-E91 - "22:35 UT" - 2018 ER3


MPEC 2018-E90 - "21:04 UT" - 2016 CD289


MPEC 2018-E89 - "21:01 UT" - 2015 VG157


MPEC 2018-E88 - "20:58 UT" - 2015 KV167


MPEC 2018-E87 - "20:55 UT" - 2015 TJ367


MPEC 2018-E86 - "20:52 UT" - 2015 TH367


MPEC 2018-E85 - "20:49 UT" - 2015 TG367


MPEC 2018-E84 - "20:47 UT" - 2015 FW403


MPEC 2018-E83 - "20:44 UT" - 2015 FV403


<< DOU on 13 Mar. '18 >>  MPEC 2018-E82 - "12:03 UT" - Daily Orbit Update


MPEC 2018-E81 - "11:33 UT" - 2011 LH21


MPEC 2018-E80 - "11:20 UT" - 2018 EZ2


MPEC 2018-E79 - "01:44 UT" - 2012 VL94

Observers  on 13 March '18

A total of 39 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 13 in MPECs 2018-E82, 2018-E91, 2018-E92, 2018-E93, 2018-E94, 2018-E95, 2018-E96, 2018-E98, 2018-E99, 2018-E100 & 2018-E101 -- 2018 EY3, 2018 EX3, 2018 EW3, 2018 EV3, 2018 EU3, 2018 ET3, 2018 ES3, 2018 ER3, 2018 EB4, 2018 EA4, 2017 TO4, 2017 AV3, 163683
C77Bernezzo Obs. in Italy, 2 in MPECs 2018-E98 & 2018-E101 -- 2018 EB4, 2018 EA4
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2018-E98 & 2018-E101 -- 2018 EB4, 2018 EA4
K51Celado Obs. in Italy, 3 in MPECs 2018-E98, 2018-E99 & 2018-E101 -- 2018 ET3, 2018 EB4, 2018 EA4
309'Martin Altmann in Germany via Cerro Paranal in Chile, 1 in MPEC 2018-E82 -- 467527
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPECs 2018-E79, 2018-E80, 2018-E81, 2018-E82, 2018-E92, 2018-E94 & 2018-E97 -- 2018 EZ3, 2018 EZ2, 2018 EW3, 2018 ES3, 2018 ER1, 2018 EB, 2017 YO6, 2017 ST20, 2012 VL94, 2011 LH21
K65Cesena Obs. in Italy, 1 in MPEC 2018-E80 -- 2018 EZ2
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2018-E98 -- 2018 EB4
I112program code 2 via Gemini South Obs. in Chile, 1 in MPEC 2018-E84 -- 2015 FW403
K88GINOP-KHK in Hungary, 4 in MPECs 2018-E80, 2018-E94, 2018-E98 & 2018-E101 -- 2018 EZ2, 2018 EW3, 2018 EB4, 2018 EA4
H06#M. Suzuki in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-E80 -- 2018 EZ2
Q622Marian Urbanik in Slovakia via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-E82 -- 2018 DH1
Q66JAXA Janess-G in New South Wales, 1 in MPEC 2018-E80 -- 2018 EZ2
P93JAXA Space Tracking & Communications Center (JAXA STCC) in Japan, 3 in MPECs 2018-E80, 2018-E94 & 2018-E98 -- 2018 EZ2, 2018 EW3, 2018 EB4
304Las Campanas Obs. in Chile, 8 in MPECs 2018-E83, 2018-E84, 2018-E85, 2018-E86, 2018-E87, 2018-E88, 2018-E89 & 2018-E90 -- 2016 CD289, 2015 VG157, 2015 TJ367, 2015 TH367, 2015 TG367, 2015 KV167, 2015 FW403, 2015 FV403
W85LCO Cerro Tololo A in Chile, 1 in MPEC 2018-E82 -- 2018 EB
W89LCO Cerro Tololo Aqawan A#1 in Chile, 1 in MPEC 2018-E82 -- 2017 VR12
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2018-E93, 2018-E99 & 2018-E100 -- 2018 EV3, 2018 EU3, 2018 ET3
5685Scott Sheppard on Mauna Kea in Hawaii, 8 in MPECs 2018-E83, 2018-E84, 2018-E85, 2018-E86, 2018-E87, 2018-E88, 2018-E89 & 2018-E90 -- 2016 CD289, 2015 VG157, 2015 TJ367, 2015 TH367, 2015 TG367, 2015 KV167, 2015 FW403, 2015 FV403
900Moriyama Obs. in Japan, 1 in MPEC 2018-E98 -- 2018 EB4
474Mt. John Obs. in New Zealand, 1 in MPEC 2018-E82 -- 2018 DD4
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2018-E82, 2018-E93, 2018-E99, 2018-E100 & 2018-E101 -- 2018 EY2, 2018 EX2, 2018 EV3, 2018 EU3, 2018 ET3, 2018 EA4, 2018 DN4, 2018 DM4
Z80Northolt Branch Obs. in England, 1 in MPEC 2018-E98 -- 2018 EB4
F51Pan-STARRS 1 (PS1) in Hawaii, 7 in MPECs 2018-E82, 2018-E91, 2018-E92, 2018-E94, 2018-E95, 2018-E96 & 2018-E97 -- 2018 EZ3, 2018 EY3, 2018 EX3, 2018 EX2, 2018 EW3, 2018 ES3, 2018 ER3
K63Pascoli Obs. in Italy, 2 in MPECs 2018-E98 & 2018-E101 -- 2018 EB4, 2018 EA4
B49Paus Obs. in Spain, 2 in MPECs 2018-E98 & 2018-E101 -- 2018 EB4, 2018 EA4
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2018-E82 -- 2018 EX2
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2018-E80 -- 2018 EZ2
C95SATINO-1 in France, 3 in MPECs 2018-E80, 2018-E98 & 2018-E101 -- 2018 EZ2, 2018 EB4, 2018 EA4
033Schwarzschild Obs. in Germany, 4 in MPECs 2018-E93, 2018-E95, 2018-E97 & 2018-E98 -- 2018 EZ3, 2018 EX3, 2018 EU3, 2018 EB4
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-E82 -- 2018 DX3
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPECs 2018-E82 & 2018-E98 -- 2018 EH, 2018 EB4
691Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2018-E82 -- 2018 DT1, 2018 CY, 2018 CP3, 2018 BA7, 1999 FN19
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2018-E82 -- 2017 RD15, 2011 EB7
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2018-E98 -- 2018 EB4
I52Steward Obs. Mt. Lemmon Station in Arizona, 24 in MPECs 2018-E82, 2018-E93, 2018-E95, 2018-E97, 2018-E98, 2018-E99, 2018-E100 & 2018-E101 -- 2018 EZ3, 2018 EZ, 2018 EY, 2018 EX3, 2018 EX2, 2018 EX, 2018 EW1, 2018 EV3, 2018 EU3, 2018 ET3, 2018 ET1, 2018 EM2, 2018 EH, 2018 EG, 2018 EF1, 2018 EE, 2018 EB4, 2018 EA4, 2018 DX1, 2018 DN4, 2018 DM4, 2018 DJ, 2018 DG1, 2018 DA4
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2018-E98 -- 2018 EB4
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2018-E82 -- 2017 YO5, 2017 ED3
718Wiggins Obs. in Utah, 1 in MPEC 2018-E98 -- 2018 EB4
C51WISE in Earth polar orbit, 1 in MPEC 2018-E82 -- 496837
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 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 EZ2JPL Sentry16302056-2105111.0180747e-05-5.99-6.400JPL: Computed at 05:56 today Pacific time based on 43 observations spanning .70033 days (2018-Mar-12.42083 to 2018-Mar-13.12116). Diameter approximately 0.017 km. from weighted mean H=26.54.
2018 EY2JPL Sentry21002031-2101387.01402e-08-7.06-7.700JPL: Computed at 12:06 today Pacific time based on 8 observations spanning .14397 days (2018-Mar-07.37107 to 2018-Mar-07.51504). Diameter approximately 0.029 km. from weighted mean H=25.37.
2018 EBJPL Sentry1630R E M O V E DJPL: Risk listing removed at 1501 UTC today
2018 DN4JPL Sentry16302023-209493.644042e-07-6.79-6.830JPL: Computed at 07:46 today Pacific time based on 10 observations spanning .14455 days (2018-Feb-26.24992 to 2018-Feb-26.39447). Diameter approximately 0.008 km. from weighted mean H=28.19.
2017 YO5JPL Sentry16302090-211791.379332e-05-5.79-6.080JPL: Computed at 07:59 today Pacific time based on 31 observations spanning 26.117 days (2017-Dec-25.45197 to 2018-Jan-20.568928). Diameter approximately 0.020 km. from weighted mean H=26.13.

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 13 March '18

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

2324Grabbed MPEC 2018-E99 - 2018 ET3 - see above
Grabbed MPEC 2018-E100 - 2018 EV3 - see above
Grabbed MPEC 2018-E101 - 2018 EA4 - see above
2301Grabbed MPEC 2018-E91 - 2018 ER3 - see above
Grabbed MPEC 2018-E92 - 2018 ES3 - see above
Grabbed MPEC 2018-E93 - 2018 EU3 - see above
Grabbed MPEC 2018-E94 - 2018 EW3 - see above
Grabbed MPEC 2018-E95 - 2018 EX3 - see above
Grabbed MPEC 2018-E96 - 2018 EY3 - see above
Grabbed MPEC 2018-E97 - 2018 EZ3 - see above
Grabbed MPEC 2018-E98 - 2018 EB4 - see above
2139Grabbed MPEC 2018-E89 - 2015 VG157 - see above
Grabbed MPEC 2018-E90 - 2016 CD289 - see above
2100Noted that JPL Sentry has posted 2018 EY2 as an impact risk - see above
Grabbed MPEC 2018-E83 - 2015 FV403 - see above
Grabbed MPEC 2018-E84 - 2015 FW403 - see above
Grabbed MPEC 2018-E85 - 2015 TG367 - see above
Grabbed MPEC 2018-E86 - 2015 TH367 - see above
Grabbed MPEC 2018-E87 - 2015 TJ367 - see above
Grabbed MPEC 2018-E88 - 2015 KV167 - see above
1846Generated Traffic Report
1630Noted that JPL Sentry has updated its 2017 YO5 risk assessment - see above
Noted that JPL Sentry has posted 2018 DN4 as an impact risk - see above
Noted that JPL Sentry has removed 2018 EB as an impact risk - see above
Noted that JPL Sentry has posted 2018 EZ2 as an impact risk - see above
Grabbed MPEC 2018-E80 - 2018 EZ2 - see above
Grabbed MPEC 2018-E81 - 2011 LH21 - see above
Grabbed MPEC 2018-E82 - Daily Orbit Update - see above
0402Grabbed MPEC 2018-E79 - 2012 VL94 - see above