Contents  on 7 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 7 March '18

Nine objects reported inside ten LD

Nine transient natural objects are reported to be less than ten lunar distances (LD) from our planet today. Nearest are radar target 2017 VR12, which comes its closest to Earth this time around, reaching 3.76 LD at 0752 UTC, and 2018 DC4, heading out from 3.83 to 4.34 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  6.51 to 7.87 LD Feb. 22 - March 9 intruder, NHATS target
0.74 LD Feb. 25 2018 DU 8 m  9.07 to 10.04 LD Feb. 15 - today intruder, NHATS target, exits ten LD
3.32 LD March 4 2018 DC4 11 m  3.83 to 4.34 LD Feb. 22 - March 15 NHATS target
3.76 LD today 2017 VR12 257 m  3.76 LD Feb. 28 - March 13 radar/NHATS target, Earth closest at 0752 UTC - DOU
4.18 LD Feb. 27 2018 DT 13 m  6.18 to 6.61 LD Feb. 11 - March 15 NHATS target - DOU
5.09 LD March 2 2018 DU1 9 m  8.15 to 9.29 LD Feb. 24 - tomorrow NHATS target, risk
5.27 LD March 11 2018 DY3 20 m  7.68 from 9.08 LD yesterday - March 15 NHATS target - DOU
5.44 LD Feb. 27 2018 CU14 10 m  9.17 to 9.98 LD Feb. 19 - tomorrow NHATS target
7.02 LD March 10 2015 DK200 26 m  8.13 from 9.16 LD yesterday - March 14 NHATS target - MPEC

This report was generated at 2022 UTC with the recovery of returning 2015 DK200 (MPEC), and with first follow-up for departed 2018 DJ1 in today's DOU MPEC, along with follow-up for approaching 2018 DH1, inbound 2018 DY3, passing 2017 VR12, outbound 2018 DT, departed 2018 BQ, and distant 450894 2008 BT18.

Approaching Traffic
Earth passage I D ~Size Distance today  Inside ten LD Notes
9.2   LD March 27* 2018 DH1 214 m  65.9 from 69.5 LD March 26 - 28 EPU +/- 23 mins.* - DOU
* 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 7 March '18

The MPC's NEO Confirmation Page has 63 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 63 objects listed. Of these, 42 were "one nighters." So far The Tracking News has counted a total of 76 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 7 March '18

Minor Planet Electronic Circulars

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


MPEC 2018-E28 - "19:37 UT" - 2006 UF17


MPEC 2018-E27 - "18:55 UT" - 2014 QP266


MPEC 2018-E26 - "15:47 UT" - 2018 EB


MPEC 2018-E25 - "15:43 UT" - 2018 DJ4


MPEC 2018-E24 - "15:23 UT" - 2013 JN22


<< DOU on 7 Mar. '18 >>  MPEC 2018-E23 - "13:02 UT" - Daily Orbit Update


MPEC 2018-E22 - "12:45 UT" - 2015 DK200


MPEC 2018-E21 - "02:34 UT" - 2015 XE352

Observers  on 7 March '18

A total of 22 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 14 in MPECs 2018-E22 & 2018-E23 -- 2018 DY3, 2018 DX3, 2018 DT, 2018 DJ, 2018 DH1, 2018 DG1, 2018 DE2, 2018 DB2, 2018 DA4, 2018 DA2, 2018 CU1, 2018 BO3, 2017 XH62, 2015 DK200
T05ATLAS Haleakala in Hawaii, 18 in MPECs 2018-E21 & 2018-E23 -- 2018 DH1, 2015 XE352, 511808, 505667, 450894, 434344, 385580, 265196, 190208, 172034, 162882, 154347, 12711, 8037, 7977, 6053, 6050, 1980
T08ATLAS Mauna Loa in Hawaii, 5 in MPEC 2018-E23 -- 508871, 265032, 163243, 1685, 1036
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2018-E23 & 2018-E27 -- 2015 XE352, 2014 QP266
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2018-E24, 2018-E25 & 2018-E26 -- 2018 EB, 2018 DJ4, 2013 JN22
I114Joseph Masiero in southern California via Gemini South Obs. in Chile, 1 in MPEC 2018-E26 -- 2018 EB
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 2 in MPECs 2018-E24 & 2018-E25 -- 2018 DJ4, 2013 JN22
W85LCO Cerro Tololo A in Chile, 1 in MPEC 2018-E23 -- 234145
W87LCO Cerro Tololo C in Chile, 1 in MPEC 2018-E23 -- 234145
V38LCO McDonald Obs. Aqawan A#1 in Texas, 1 in MPEC 2018-E23 -- 2017 VR12
K91LCO Sutherland A in South Africa, 1 in MPEC 2018-E26 -- 2018 EB
K93LCO Sutherland C in South Africa, 1 in MPEC 2018-E24 -- 2013 JN22
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2018-E25, 2018-E27 & 2018-E28 -- 2018 DJ4, 2014 QP266, 2006 UF17
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2018-E22 & 2018-E25 -- 2018 DJ4, 2015 DK200
I41Palomar Transient Factory (PTF) in southern California, 9 in MPEC 2018-E23 -- 2016 CL32, 509935, 505667, 190208, 162882, 7977, 3122, 1866, 1864
F51Pan-STARRS 1 (PS1) in Hawaii, 28 in MPECs 2018-E21, 2018-E23 & 2018-E28 -- 2018 DJ1, 2018 DG1, 2018 DA4, 2018 CU1, 2018 CE2, 2015 XE352, 2015 DP155, 2015 DP, 2013 RZ73, 2011 EC7, 2006 UF17, 514041, 513776, 513138, 509935, 508905, 505667, 450894, 434344, 41429, 337228, 330825, 257744, 232691, 190208, 154652, 153958, 144861
K61Rokycany Obs. in the Czech Republic, 1 in MPEC 2018-E27 -- 2014 QP266
691Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2018-E23 -- 2018 DY1, 2018 DX1, 2018 DH1, 2018 BQ, 2018 AF4
291Spacewatch 1.8m telescope in Arizona, 5 in MPECs 2018-E23, 2018-E25 & 2018-E28 -- 2018 DJ4, 2014 QX33, 2014 QK434, 2009 FF, 2006 UF17
I52Steward Obs. Mt. Lemmon Station in Arizona, 23 in MPECs 2018-E22, 2018-E23, 2018-E25, 2018-E27 & 2018-E28 -- 2018 DY3, 2018 DX1, 2018 DW3, 2018 DT, 2018 DR1, 2018 DJ4, 2018 DG1, 2018 DF2, 2018 DB4, 2018 DA4, 2018 DA2, 2018 CX13, 2018 CR1, 2018 CK14, 2018 CB15, 2018 AG2, 2017 YP4, 2017 YE5, 2017 QL33, 2015 DK200, 2014 QP266, 2013 EY27, 2006 UF17
A16Tentlingen Obs. in Switzerland, 1 in MPEC 2018-E23 -- 162998
C51WISE in Earth polar orbit, 2 in MPECs 2018-E24 & 2018-E26 -- 2018 EB, 2013 JN22
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 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 EBJPL Sentry19002070-2117142.3479065e-06-3.95-4.080JPL: Computed at 10:12 today Pacific time based on 20 observations spanning 3.3970 days (2018-Mar-01.87465 to 2018-Mar-05.27168). Diameter approximately 0.160 km. from weighted mean H=21.61.

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 7 March '18

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

2022Generated Traffic Report
2004Grabbed MPEC 2018-E28 - 2006 UF17 - see above
1900Noted that JPL Sentry has posted 2018 EB as an impact risk - see above
Grabbed MPEC 2018-E27 - 2014 QP266 - see above
1730Grabbed MPEC 2018-E22 - 2015 DK200 - see above
Grabbed MPEC 2018-E23 - Daily Orbit Update - see above
Grabbed MPEC 2018-E24 - 2013 JN22 - see above
Grabbed MPEC 2018-E25 - 2018 DJ4 - see above
Grabbed MPEC 2018-E26 - 2018 EB - see above
0309Grabbed MPEC 2018-E21 - 2015 XE352 - see above