Contents  on 24 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 24 March '18

Fifteen objects reported inside ten LD

There are fifteen asteroids known to be inside ten lunar distances (LD) of Earth today. Nearest of these is outbound intruder 2018 FZ3, which leaves Earth's SOI (sphere of gravitational influence) as it heads out from 1.13 to 4.19 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
0.38 LD March 18 2018 FE3 13 m  7.78 to 9.14 LD March 10 - 25 intruder, NHATS target, risk
0.50 LD yesterday 2018 FZ3 10 m  1.13 to 4.19 LD March 20 - 26 intruder, exits Earth SOI
1.13 LD yesterday 2018 FF3 16 m  2.62 to 5.17 LD March 19 - 26
1.60 LD March 21 2018 ED9 13 m  3.19 to 4.42 LD March 14 - 29 NHATS target
3.17 LD March 22 2018 FR3 12 m  4.42 to 5.76 LD March 16 - 27 NHATS target
4.38 LD March 18 2018 ET1 18 m  8.87 to 10.06 LD March 11 - 24 NHATS target, exits ten LD
4.45 LD March 21 2018 FG1 12 m  7.54 to 9.38 LD March 17 - 25 risk
5.24 LD yesterday 2018 FC3 11 m  5.29 to 6.68 LD March 21 - 26
5.63 LD tomorrow 2018 FQ1 14 m  5.75 from 6.15 LD March 19 - April 1 NHATS target
6.15 LD March 26 2018 FR1 16 m  6.92 from 8.53 LD yesterday - March 29
7.68 LD March 22 2018 EV1 27 m  8.66 to 10.08 LD March 19 - 24 exits ten LD
7.69 LD March 28 2018 FO4 11 m  9.41 from 10.30 LD today - April 2 enters ten LD
9.00 LD yesterday 2018 FL2 26 m  9.29 to 10.99 LD March 22 - 24 exits ten LD
9.20 LD today 2018 FW1 33 m  9.20 LD March 22 - 27 Earth closest at 1849 UTC
9.27 LD tomorrow 2018 FB3 31 m  9.27 from 10.00 LD today - March 26 enters ten LD

This report was generated at 1924 UTC with the discoveries of approaching 2018 FW4 (MPEC) and already departed 2018 FX4 (MPEC), which flew by Earth at 4.11 LD on March 20th, and with additional observation in today's DOU MPEC of departed risk-listed 2018 FQ4.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
4.88 LD March 29 2018 FB 64 m  10.53 from 12.25 LD tomorrow - April 3
9.17 LD March 27 2018 DH1 214 m  12.09 from 14.42 LD March 26 - 28 radar target
6.22 LD April 1 2018 EM4 30 m  11.77 from 12.96 LD March 26 - April 6 NHATS target
4.0   LD April 2* 2004 FG29 21 m  29.1 from 32.5 LD March 30 - April 5 EPU +/- 1.03 hours*
9.7   LD April 5* 2018 FW4 31 m  31.0 from 33.6 LD April 4 - 6 NEW, EPU +/- 21 mins.* - MPEC
9.24 LD April 14 2014 UR 16 m  21.79 from 22.62 LD April 10 - 18 NHATS target
6.2   LD May 8* 2016 JQ5 8 m  119.9 from 123.3 LD May 4 - 11 EPU +/- 14.00 hours*
9.65 LD May 7 1999 FN19 112 m  54.00 from 55.24 LD May 5 - 9 radar/NHATS target
6.48 LD May 9 388945 2008 TZ3 282 m  104.26 from 107.06 LD May 5 - 13
9.50 LD May 29 68347 2001 KB67 371 m  254.62 from 260.12 LD May 28 - 30 radar target
5.6   LD June 10* 2018 EJ4 184 m  102.1 from 103.6 LD June 4 - 16 EPU +/- 3.33 hours*, radar/NHATS target
8.96 LD June 11 2015 DP155 162 m  64.03 from 64.84 LD June 6 - 15 NHATS target
* 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. 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 24 March '18

The MPC's NEO Confirmation Page has 28 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 28 objects listed. Of these, thirteen were "one nighters." So far The Tracking News has counted a total of 41 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 24 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-F127 - "16:45 UT" - 2018 FY4


MPEC 2018-F126 - "16:40 UT" - 2018 FX4


MPEC 2018-F125 - "16:36 UT" - 2018 FW4


MPEC 2018-F124 - "16:33 UT" - 2018 FV4


MPEC 2018-F123 - "16:27 UT" - 2018 FU4


<< DOU on 24 Mar. '18 >>  MPEC 2018-F122 - "12:20 UT" - Daily Orbit Update


MPEC 2018-F121 - "11:50 UT" - 2016 EO85


MPEC 2018-F120 - "11:48 UT" - 2011 KE


MPEC 2018-F119 - "11:46 UT" - 2004 EU22

Observers  on 24 March '18

A total of 26 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 6 in MPEC 2018-F122 -- 2018 CR1, 2017 YB8, 2017 RV1, 2014 XK3, 2010 XY82, 2008 EC85
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2018-F123 -- 2018 FU4
160Castelmartini Obs. in Italy, 7 in MPECs 2018-F122 & 2018-F123 -- 2018 FU4, 36284, 162998, 12711, 8037, 3122, 1981
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2018-F123 & 2018-F126 -- 2018 FX4, 2018 FU4
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 4 in MPECs 2018-F124, 2018-F125, 2018-F126 & 2018-F127 -- 2018 FY4, 2018 FX4, 2018 FW4, 2018 FV4
107Cavezzo Obs. in Italy, 2 in MPEC 2018-F122 -- 2018 DX3, 152931
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2018-F123, 2018-F124, 2018-F125 & 2018-F126 -- 2018 FX4, 2018 FW4, 2018 FV4, 2018 FU4
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 3 in MPECs 2018-F119 & 2018-F122 -- 2004 EU22, 172034, 12923
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2018-F123 & 2018-F126 -- 2018 FX4, 2018 FU4
203GiaGa Obs. in Italy, 1 in MPEC 2018-F123 -- 2018 FU4
P93JAXA Space Tracking & Communications Center (JAXA STCC) in Japan, 4 in MPECs 2018-F120, 2018-F122, 2018-F123 & 2018-F126 -- 2018 FX4, 2018 FU4, 2018 FQ4, 2011 KE
H01Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPECs 2018-F120, 2018-F123, 2018-F124, 2018-F125, 2018-F126 & 2018-F127 -- 2018 FY4, 2018 FX4, 2018 FW4, 2018 FV4, 2018 FU4, 2011 KE
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2018-F122 -- 9856
932McCarthy Obs. in Connecticut, 1 in MPEC 2018-F126 -- 2018 FX4
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2018-F120, 2018-F122, 2018-F123, 2018-F124, 2018-F125 & 2018-F127 -- 2018 FY4, 2018 FW4, 2018 FV4, 2018 FU4, 2012 HO1, 2011 KE, 456898, 376729, 358744, 154652, 6053, 3271
J43Oukaimeden Obs. in Morocco, 6 in MPEC 2018-F122 -- 2018 DX3, 2018 DB2, 454100, 322763, 172034, 162038
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2018-F121 -- 2016 EO85
K63Pascoli Obs. in Italy, 2 in MPECs 2018-F123 & 2018-F126 -- 2018 FX4, 2018 FU4
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2018-F123 & 2018-F126 -- 2018 FX4, 2018 FU4
C95SATINO-1 in France, 1 in MPEC 2018-F126 -- 2018 FX4
204Schiaparelli Obs. in Italy, 2 in MPECs 2018-F123 & 2018-F126 -- 2018 FX4, 2018 FU4
Y28Sertao de Itaparica Obs. in Brazil, 1 in MPEC 2018-F119 -- 2004 EU22
G40'program code "'" (16) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-F122 -- 2018 FL3
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2018-F122 -- 2018 FC2
I52Steward Obs. Mt. Lemmon Station in Arizona, 7 in MPECs 2018-F120, 2018-F122, 2018-F123, 2018-F125, 2018-F126 & 2018-F127 -- 2018 FY4, 2018 FX4, 2018 FW4, 2018 FU4, 2018 FH2, 2011 KE, 358744
C51WISE in Earth polar orbit, 1 in MPEC 2018-F122 -- 163691
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 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 FQ4JPL Sentry16012074-211567.533567e-07-7.34-7.630JPL: Computed at 15:53 April 10th of 2017 Pacific time based on 42 observations spanning 8.1701 days (2006-Dec-13.32102 to 2006-Dec-21.49109). Diameter approximately 0.013 km. from weighted mean H=27.11.
2018 FC2JPL Sentry16012099-209912.019e-07-6.79-6.790JPL: Computed at 07:27 today Pacific time based on 25 observations spanning 5.9122 days (2018-Mar-18.58001 to 2018-Mar-24.49219). Diameter approximately 0.037 km. from weighted mean H=24.79.
2006 XZ2JPL Sentry1601R E M O V E DJPL

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 24 March '18

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

1924Generated Traffic Report
1702Grabbed MPEC 2018-F123 - 2018 FU4 - see above
Grabbed MPEC 2018-F124 - 2018 FV4 - see above
Grabbed MPEC 2018-F125 - 2018 FW4 - see above
Grabbed MPEC 2018-F126 - 2018 FX4 - see above
Grabbed MPEC 2018-F127 - 2018 FY4 - see above
1601Noted that JPL Sentry has removed 2006 XZ2 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 FC2 risk assessment - see above
Noted that JPL Sentry has updated its 2018 FQ4 risk assessment - see above
Grabbed MPEC 2018-F119 - 2004 EU22 - see above
Grabbed MPEC 2018-F120 - 2011 KE - see above
Grabbed MPEC 2018-F121 - 2016 EO85 - see above
Grabbed MPEC 2018-F122 - Daily Orbit Update - see above