Contents  on 8 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 8 March '18

Eight objects reported inside ten LD

Eight minor objects are reported within ten lunar distances (LD) of Earth today. Nearest are outbound objects 2017 VR12, moving from 3.88 to 4.44 LD, and 2018 DC4 from 4.34 to 4.95 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  7.87 to 9.24 LD Feb. 22 - tomorrow intruder, NHATS target
3.32 LD March 4 2018 DC4 11 m  4.34 to 4.95 LD Feb. 22 - March 15 NHATS target
3.76 LD yesterday 2017 VR12 257 m  3.88 to 4.44 LD Feb. 28 - March 13 radar/NHATS target - DOU
4.18 LD Feb. 27 2018 DT 13 m  6.61 to 7.06 LD Feb. 11 - March 15 NHATS target
5.09 LD March 2 2018 DU1 9 m  9.29 to 10.50 LD Feb. 24 - today NHATS target, exits ten LD, risk
5.26 LD March 11 2018 DY3 20 m  6.48 from 7.67 LD March 6 - 15 NHATS target - DOU
5.44 LD Feb. 27 2018 CU14 10 m  9.98 to 10.81 LD Feb. 19 - today NHATS target, exits ten LD
7.02 LD March 10 2015 DK200 26 m  7.39 from 8.13 LD March 6 - 14 NHATS target

This report was updated at 2323 UTC with the discovery of approaching 2018 EH (MPEC, see details in the Approaching Traffic table). Your first local flying rocks traffic report was generated at 1846 UTC with follow-up in today's DOU MPEC for approaching 2018 DH1, inbound 2018 DY3, outbound 2017 VR12, and distant 450894 2008 BT18, plus astrometry from mid-February for intruder 2018 CD3 and for 2018 CP2, 2018 CH2, 2018 CB2, 2018 CX, and 2018 CJ.

Approaching (sorted by 10-LD bubble entry date)
9.19 LD March 15 2018 EH 46 m  18.09 from 20.29 LD March 13 - 16 NEW - MPEC
9.2   LD March 27* 2018 DH1 214 m  62.4 from 65.9 LD March 26 - 28 EPU +/- 14 mins.* - DOU
* EPU = Earth passage uncertainty


Reading:  The European R&D news service Cordis has a news item about the new EISCAT3D (PDF) phased-array radar system spread across three arctic countries. It will study the atmospheric effects from space weather as well as observe meteors, micrometeors, and space debris, explore "asteroid imaging," and look for postulated mini-moons (small asteroids temporarily captured into Earth orbit).
        BuzzFeed News reports that "Government Scientists Have A Plan For Blowing Up Asteroids With A Nuke," a concept study with the apocalyptically appropriate name, "HAMMER" (PDF). (One correction: 9P/Tempel 1 is not an asteroid.)



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 come within ten LD since A/CC began these traffic reports (2007) but is not now 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 8 March '18

The MPC's NEO Confirmation Page has 73 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 73 objects listed. Of these, 43 were "one nighters." So far The Tracking News has counted a total of 85 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 8 March '18

Minor Planet Electronic Circulars

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


MPEC 2018-E35 - "21:37 UT" - 2018 DL4


MPEC 2018-E34 - "21:33 UT" - 2018 EJ


MPEC 2018-E33 - "21:29 UT" - 2018 EH


MPEC 2018-E32 - "21:26 UT" - 2018 EG


MPEC 2018-E31 - "21:22 UT" - 2018 EF


MPEC 2018-E30 - "21:17 UT" - 2018 EE


<< DOU on 8 Mar. '18 >>  MPEC 2018-E29 - "13:02 UT" - Daily Orbit Update

Observers  on 8 March '18

A total of 30 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2018-E29 -- 2014 QP266
H21Astronomical Research Obs. Westfield in Illinois, 11 in MPECs 2018-E29, 2018-E30 & 2018-E35 -- 2018 EE, 2018 DL4, 2018 CX13, 2018 CO2, 2018 CO14, 2018 CM2, 2018 CG2, 2018 CD1, 2017 VH2, 2015 DP, 185853
T05ATLAS Haleakala in Hawaii, 2 in MPEC 2018-E29 -- 294739, 1036
T08ATLAS Mauna Loa in Hawaii, 15 in MPECs 2018-E29 & 2018-E33 -- 2018 EH, 2018 DX3, 2015 XE352, 66251, 513497, 411201, 333888, 322763, 204232, 152952, 14402, 142040, 141484, 1980, 1627
C77Bernezzo Obs. in Italy, 2 in MPECs 2018-E30 & 2018-E33 -- 2018 EH, 2018 EE
703Catalina Sky Survey (CSS) in Arizona, 21 in MPECs 2018-E29 & 2018-E33 -- 2018 EH, 2018 DH1, 96315, 511808, 511523, 509935, 505667, 450894, 434344, 38091, 358744, 322763, 265196, 172034, 163692, 162998, 162882, 143992, 142348, 12711, 6053
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2018-E29, 2018-E32 & 2018-E34 -- 2018 EJ, 2018 EG, 2017 XF62
K88GINOP-KHK in Hungary, 2 in MPECs 2018-E30 & 2018-E33 -- 2018 EH, 2018 EE
J95Great Shefford Obs. in England, 1 in MPEC 2018-E35 -- 2018 DL4
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-E29 -- 1866
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-E30 -- 2018 EE
W86LCO Cerro Tololo B in Chile, 1 in MPEC 2018-E29 -- 507366
V38LCO McDonald Obs. Aqawan A#1 in Texas, 1 in MPEC 2018-E29 -- 2017 VR12
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2018-E30, 2018-E32 & 2018-E33 -- 2018 EH, 2018 EG, 2018 EE
568_Marco Micheli on Mauna Kea in Hawaii, 2 in MPECs 2018-E32 & 2018-E33 -- 2018 EH, 2018 EG
G96Mt. Lemmon Survey (MLS) in Arizona, 15 in MPECs 2018-E29, 2018-E30 & 2018-E35 -- 2018 EE, 2018 DL4, 2018 DG, 2018 CE2, 2014 OY1, 509520, 490684, 267337, 238063, 237805, 174881, 101873, 10150, 1866, 1864
I41Palomar Transient Factory (PTF) in southern California, 12 in MPEC 2018-E29 -- 2018 DX3, 2018 CU1, 2010 FL, 496861, 434344, 358744, 190208, 172034, 162011, 154652, 142348, 3122
F51Pan-STARRS 1 (PS1) in Hawaii, 27 in MPECs 2018-E29, 2018-E31, 2018-E32, 2018-E33, 2018-E34 & 2018-E35 -- 2018 EJ, 2018 EH, 2018 EG, 2018 EF, 2018 DY3, 2018 DL4, 2018 CM2, 2017 SL33, 2016 DP, 2015 JA2, 2014 OY1, 2013 QH10, 2012 DG61, 2011 BM24, 2009 FG1, 2005 QL, 2005 GL, 2000 YG29, 86326, 331510, 307493, 277039, 27346, 208617, 163692, 152889, 1866
K63Pascoli Obs. in Italy, 1 in MPEC 2018-E33 -- 2018 EH
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 2 in MPECs 2018-E31 & 2018-E32 -- 2018 EG, 2018 EF
K61Rokycany Obs. in the Czech Republic, 1 in MPEC 2018-E33 -- 2018 EH
204Schiaparelli Obs. in Italy, 15 in MPECs 2018-E29 & 2018-E30 -- 2018 EE, 2018 CX, 2018 CP2, 2018 CJ, 2018 CH2, 2018 CD3, 2018 CB2, 2018 CA2, 2016 CW31, 2015 SY16, 2009 BM2, 2007 LU19, 2003 MD7, 2003 CA4, 2002 LX
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-E29 -- 2018 DH1
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2018-E29 -- 2018 DH1, 2017 BD29, 1999 FN19
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2018-E31 & 2018-E32 -- 2018 EG, 2018 EF
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2018-E29 -- 505657
I52Steward Obs. Mt. Lemmon Station in Arizona, 7 in MPECs 2018-E29, 2018-E30, 2018-E31, 2018-E32, 2018-E33 & 2018-E35 -- 2018 EH, 2018 EG, 2018 EF, 2018 EE, 2018 DL4, 2018 DG, 2014 MK27
Z52The Studios Obs., 2 in MPEC 2018-E29 -- 311554, 137062
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2018-E29 -- 2017 EQ13, 2016 UL5
L01Visnjan Obs., 1 in MPEC 2018-E30 -- 2018 EE
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 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 EEJPL Sentry23232108-210813.389e-10-8.22-8.220JPL: Computed at 14:49 today Pacific time based on 38 observations spanning 2.6542 days (2018-Mar-06.1697 to 2018-Mar-08.82389). Diameter approximately 0.140 km. from weighted mean H=21.95.
2018 EBNEODyS16302072-211436.67e-07-4.52-4.520NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2018-03-01.875 to 2018-03-05.272."
2018 DP3NEODyS16302062-209044.83e-10-10.59-10.720NEODyS: "Based on 53 optical observations (of which 0 are rejected as outliers) from 2018-02-17.290 to 2018-02-17.469."
2018 DO3NEODyS16302040-210781.63e-08-9.60-9.880NEODyS: "Based on 63 optical observations (of which 0 are rejected as outliers) from 2018-02-17.284 to 2018-02-17.470."

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 8 March '18

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

2323Noted that JPL Sentry has posted 2018 EE as an impact risk - see above
Updated Traffic Report
2208Grabbed MPEC 2018-E35 - 2018 DL4 - see above
2135Grabbed MPEC 2018-E30 - 2018 EE - see above
Grabbed MPEC 2018-E31 - 2018 EF - see above
Grabbed MPEC 2018-E32 - 2018 EG - see above
Grabbed MPEC 2018-E33 - 2018 EH - see above
Grabbed MPEC 2018-E34 - 2018 EJ - see above
1630Noted that NEODyS has posted 2018 DO3 as an impact risk - see above
Noted that NEODyS has posted 2018 DP3 as an impact risk - see above
Noted that NEODyS has posted 2018 EB as an impact risk - see above
Grabbed MPEC 2018-E29 - Daily Orbit Update - see above