Contents  on 9 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 9 March '18

Six objects reported inside ten LD

Bulletin - 2202, updated 2333 UTC:  Two new discoveries of close passers have been announced.

Earth passageI D~Size~Inside ten LDNotes
3.25 LD at 1222 March 32018 ED125 m Feb. 27 - March 7MPEC
4.80 LD at 0020 March 42018 EE135 m March 1 - 7MPEC


Today there are six Solar-System small bodies known to be inside ten lunar distances (LD) of Earth. Nearest are 2017 VR12, headed away from 4.44 to 5.32 LD, and 2018 DC4, outbound from 4.95 to 5.62 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
0.29 LD March 2 2018 DV1 7 m  9.24 to 10.60 LD Feb. 22 - today intruder, NHATS target, exits ten LD
3.32 LD March 4 2018 DC4 11 m  4.95 to 5.62 LD Feb. 22 - March 15 NHATS target
3.76 LD March 7 2017 VR12 257 m  4.44 to 5.32 LD Feb. 28 - March 13 radar/NHATS target - DOU
4.18 LD Feb. 27 2018 DT 13 m  7.06 to 7.53 LD Feb. 11 - March 15 NHATS target
5.26 LD March 11 2018 DY3 20 m  5.63 from 6.48 LD March 6 - 15 NHATS target - DOU
7.02 LD tomorrow 2015 DK200 26 m  7.04 from 7.39 LD March 6 - 14 NHATS target

This report was generated at 1822 UTC with additional observation of approaching 2018 EH in today's DOU MPEC along with follow-up for approaching 2018 DH1, inbound 2018 DY3, and outbound 2017 VR12.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
9.19 LD March 15 2018 EH 46 m  15.99 from 18.09 LD March 13 - 16 DOU
9.2   LD March 27* 2018 DH1 214 m  58.9 from 62.4 LD March 26 - 28 EPU +/- 5 mins.* - DOU
* EPU = Earth passage uncertainty


<< Reading:  Bloomberg has a report on the "massive prize" awaiting asteroid miners, whose value, once mining begins, could be exceed the world's current total gross domestic product by hundreds of thousands of times.



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 9 March '18

The MPC's NEO Confirmation Page has 67 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 67 objects listed. Of these, 24 were "one nighters." So far The Tracking News has counted a total of 92 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 9 March '18

Minor Planet Electronic Circulars

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


MPEC 2018-E44 - "21:42 UT" - 2018 ED1


MPEC 2018-E43 - "21:38 UT" - 2018 EE1


MPEC 2018-E42 - "21:35 UT" - 2018 EC1


MPEC 2018-E41 - "21:31 UT" - 2018 EB1


MPEC 2018-E40 - "21:28 UT" - 2018 EA1


MPEC 2018-E39 - "21:24 UT" - 2018 EZ


MPEC 2018-E38 - "21:20 UT" - 2018 EY


MPEC 2018-E37 - "21:16 UT" - 2018 EX


<< DOU on 9 Mar. '18 >>  MPEC 2018-E36 - "13:02 UT" - Daily Orbit Update

Observers  on 9 March '18

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2018-E37 & 2018-E38 -- 2018 EY, 2018 EX
T08ATLAS Mauna Loa in Hawaii, 14 in MPECs 2018-E36 & 2018-E43 -- 2018 EE1, 2018 DX3, 2018 DH1, 505667, 443103, 265196, 190208, 174050, 172034, 162998, 8037, 7977, 6053, 1980
C77Bernezzo Obs. in Italy, 1 in MPEC 2018-E43 -- 2018 EE1
703Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2018-E36 & 2018-E44 -- 2018 ED1, 2018 BY2, 1999 AF4, 99248, 66251, 31346, 162038, 141484, 9856, 1866, 1036
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPECs 2018-E36, 2018-E37, 2018-E38, 2018-E40, 2018-E41, 2018-E43 & 2018-E44 -- 2018 EY, 2018 EX, 2018 EE1, 2018 ED1, 2018 EB1, 2018 EA1, 2018 CD1, 2018 CC14, 2017 YM6, 2017 WW12
K65Cesena Obs. in Italy, 2 in MPECs 2018-E43 & 2018-E44 -- 2018 EE1, 2018 ED1
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2018-E43 -- 2018 EE1
K88GINOP-KHK in Hungary, 4 in MPECs 2018-E38, 2018-E39, 2018-E43 & 2018-E44 -- 2018 EZ, 2018 EY, 2018 EE1, 2018 ED1
J95Great Shefford Obs. in England, 3 in MPECs 2018-E36, 2018-E39 & 2018-E43 -- 2018 EZ, 2018 EE1, 2018 DY3
T03LCO Haleakala Clamshell#3 in Hawaii, 2 in MPEC 2018-E36 -- 2017 VR12, 1981
K91LCO Sutherland A in South Africa, 1 in MPEC 2018-E36 -- 2018 EB
K93LCO Sutherland C in South Africa, 1 in MPEC 2018-E36 -- 2018 EB
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2018-E37, 2018-E38, 2018-E39 & 2018-E40 -- 2018 EZ, 2018 EY, 2018 EX, 2018 EA1
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2018-E42 -- 2018 EC1
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2018-E36 -- 2018 DH1, 2015 RL82
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2018-E39 -- 2018 EZ
608NEAT's USAF Haleakala telescope in Hawaii, 2 in MPEC 2018-E36 -- 53435, 333888
Z80Northolt Branch Obs. in England, 4 in MPEC 2018-E36 -- 162882, 3752, 3122, 1981
I41Palomar Transient Factory (PTF) in southern California, 2 in MPEC 2018-E36 -- 2012 DG61, 1866
F51Pan-STARRS 1 (PS1) in Hawaii, 25 in MPECs 2018-E36, 2018-E37, 2018-E38, 2018-E40, 2018-E41 & 2018-E42 -- 2018 EY, 2018 EX, 2018 EC1, 2018 EB1, 2018 EA1, 2018 CG2, 2018 BH7, 2018 AJ12, 2017 YA6, 2017 VO15, 2015 JA2, 2014 MK27, 2013 UG5, 2011 MU, 2008 TN26, 2003 FG, 88213, 496861, 451397, 242147, 194126, 163732, 163691, 153195, 4947
K63Pascoli Obs. in Italy, 2 in MPECs 2018-E43 & 2018-E44 -- 2018 EE1, 2018 ED1
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2018-E39 -- 2018 EZ
H36Sandlot Obs. in Kansas, 1 in MPEC 2018-E43 -- 2018 EE1
C95SATINO-1 in France, 1 in MPEC 2018-E43 -- 2018 EE1
204Schiaparelli Obs. in Italy, 6 in MPECs 2018-E36, 2018-E37, 2018-E38, 2018-E41, 2018-E43 & 2018-E44 -- 2018 EY, 2018 EX, 2018 EH, 2018 EE1, 2018 ED1, 2018 EB1
691Spacewatch 0.9m telescope in Arizona, 9 in MPECs 2018-E36 & 2018-E40 -- 2018 EA1, 2018 DW3, 2018 DH1, 2018 DF2, 2018 CY, 2018 CR1, 2018 BS1, 2018 AJ12, 1999 FN19
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2018-E36, 2018-E37, 2018-E38, 2018-E40, 2018-E41 & 2018-E42 -- 2018 EY, 2018 EX, 2018 EC1, 2018 EB1, 2018 EA1, 2018 DM1, 2017 YQ3, 2017 SS19
W34Squirrel Valley Obs. in North Carolina, 3 in MPECs 2018-E36 & 2018-E43 -- 2018 EE1, 154652, 2101
I52Steward Obs. Mt. Lemmon Station in Arizona, 12 in MPECs 2018-E36, 2018-E37, 2018-E38, 2018-E39, 2018-E40, 2018-E41, 2018-E42, 2018-E43 & 2018-E44 -- 2018 EZ, 2018 EY, 2018 EX, 2018 EE1, 2018 ED1, 2018 EC1, 2018 EB1, 2018 EA1, 2018 DY3, 2018 DD4, 2018 CP14, 2018 BH6
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 9 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 EHNEODyS1731R E M O V E DNEODyS #2 for the day
2018 EBNEODyS18012073-207522.17e-08-6.04-6.20NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2018-03-01.875 to 2018-03-08.087."
JPL Sentry17032073-207529.1114e-08-5.40-5.400JPL: Computed at 08:08 today Pacific time based on 26 observations spanning 6.2112 days (2018-Mar-01.87465 to 2018-Mar-08.08583). Diameter approximately 0.160 km. from weighted mean H=21.68.

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 9 March '18

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

2200Grabbed MPEC 2018-E37 - 2018 EX - see above
Grabbed MPEC 2018-E38 - 2018 EY - see above
Grabbed MPEC 2018-E39 - 2018 EZ - see above
Grabbed MPEC 2018-E40 - 2018 EA1 - see above
Grabbed MPEC 2018-E41 - 2018 EB1 - see above
Grabbed MPEC 2018-E42 - 2018 EC1 - see above
Grabbed MPEC 2018-E43 - 2018 EE1 - see above
Grabbed MPEC 2018-E44 - 2018 ED1 - see above
1822Generated Traffic Report
1801Noted that NEODyS has updated its 2018 EB risk assessment - see above
1731Noted that NEODyS has removed 2018 EH as an impact risk - see above
1703Noted that JPL Sentry has updated its 2018 EB risk assessment - see above
Grabbed MPEC 2018-E36 - Daily Orbit Update - see above
0828Noted that NEODyS has posted 2018 EH as an impact risk - see above