Contents  on 23 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 23 March '18

Sixteen objects reported inside ten LD

Sixteen planetesimals are reported inside ten lunar distances (LD) of our planet today. Three are within Earth's sphere of gravitational influence (SOI), where intruder 2018 FZ3 flies through the Earth-Moon system, coming in from 2.20 LD and finishing the day at 1.13 LD from Earth after passing the Moon at 1.43 LD at 1459 UTC and us at 0.50 LD at 1618 UTC. 2018 FF3 also comes its closest to Earth on this passage, reaching 1.13 LD at 0257 UTC, and 2018 ED9 exits the SOI, moving out from 2.13 to 3.19 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  6.43 to 7.78 LD March 10 - 25 intruder, NHATS target, risk - DOU
0.50 LD today 2018 FZ3 10 m  0.50 LD March 20 - 26 intruder today, Moon closest 1.43 LD at 1459
UTC, Earth closest at 1618 UTC - DOU
0.73 LD March 19 2018 FQ3 6 m  9.26 to 11.72 LD March 15 - 23 intruder, exits ten LD, risk
1.13 LD today 2018 FF3 16 m  1.13 LD March 19 - 26 Earth closest at 0257 UTC, Moon closest
1.85 LD at 0419 UTC - DOU
1.60 LD March 21 2018 ED9 13 m  2.13 to 3.19 LD March 14 - 29 NHATS target, exits Earth SOI
2.4   LD March 18* 2018 FQ4 15 m  9.6 to 11.6 LD March 13 - 23 NEW, EPU +/- 7 mins.*, exits ten LD, risk - MPEC
3.17 LD yesterday 2018 FR3 12 m  3.45 to 4.42 LD March 16 - 27 NHATS target - DOU
3.38 LD March 15 2018 FH1 16 m  9.21 to 10.26 LD March 6 - 23 NHATS target, exits ten LD
4.38 LD March 18 2018 ET1 18 m  7.73 to 8.87 LD March 11 - 24 NHATS target
4.45 LD March 21 2018 FG1 12 m  5.93 to 7.54 LD March 17 - 25 risk
5.24 LD today 2018 FC3 11 m  5.24 LD March 21 - 26 Earth closest at 1907 UTC
5.63 LD March 25 2018 FQ1 14 m  6.15 from 6.79 LD March 19 - April 1 NHATS target - DOU
6.15 LD March 26 2018 FR1 16 m  8.53 from 10.62 LD today - March 29 enters ten LD
7.68 LD yesterday 2018 EV1 27 m  7.82 to 8.66 LD March 19 - 24
9.00 LD today 2018 FL2 26 m  9.00 LD yesterday - tomorrow Earth closest at 1000 UTC
9.20 LD tomorrow 2018 FW1 33 m  9.29 from 9.67 LD yesterday - March 27

This report was generated at 1916 UTC with the discoveries of approaching 2018 FO4 (MPEC) and risk-listed outbound 2018 FQ4 (MPEC). See the traffic tables above and below for details. Today's DOU MPEC has first follow-up for departed 2018 FN3 and outbound risk-listed intruder 2018 FE3, additional observation of passing objects 2018 FF3 and intruder 2018 FZ3, as well as of outbound 2018 FR3 and departed 2018 FB4, along with continuing follow-up for five approaching objects: 2018 FB, 2018 EM4, 2018 EJ4, 2018 DH1, and 1999 FN19, plus inbound 2018 FQ1 and departed 2018 EF4. The DOU also has astrometry from early March for now departed 2018 DY3.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
9.27 LD March 25 2018 FB3 31 m  10.00 from 11.81 LD tomorrow - March 26
7.69 LD March 28 2018 FO4 11 m  10.30 from 11.30 LD tomorrow - April 2 NEW - MPEC
4.88 LD March 29 2018 FB 64 m  12.25 from 14.02 LD March 25 - April 3 DOU
9.17 LD March 27 2018 DH1 214 m  14.42 from 17.07 LD March 26 - 28 radar target - DOU
6.22 LD April 1 2018 EM4 30 m  12.96 from 14.18 LD March 26 - April 6 NHATS target - DOU
4.0   LD April 2* 2004 FG29 21 m  32.5 from 35.9 LD March 30 - April 5 EPU +/- 1.03 hours*
9.24 LD April 14 2014 UR 16 m  22.62 from 23.45 LD April 10 - 18 NHATS target
6.2   LD May 8* 2016 JQ5 8 m  123.3 from 126.7 LD May 4 - 11 EPU +/- 14.00 hours*
9.65 LD May 7 1999 FN19 112 m  55.24 from 56.49 LD May 5 - 9 radar/NHATS target - DOU
6.48 LD May 9 388945 2008 TZ3 282 m  107.06 from 109.89 LD May 5 - 13
9.50 LD May 29 68347 2001 KB67 371 m  260.12 from 265.66 LD May 28 - 30 radar target
5.6   LD June 10* 2018 EJ4 184 m  103.6 from 105.0 LD June 4 - 16 EPU +/- 3.33 hours*, radar/NHATS target - DOU
8.96 LD June 11 2015 DP155 162 m  64.84 from 65.67 LD June 6 - 15 NHATS target
* EPU = Earth passage uncertainty


<< Reading:  CNEOS at NASA/JPL has posted a news item dated 15 February (updated on the 28th) about how NASA has been responding to "increased awareness of asteroid impact risks."



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 23 March '18

The MPC's NEO Confirmation Page has 39 listings

When last checked at 2325 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 39 objects listed. Of these, eighteen were "one nighters." So far The Tracking News has counted a total of 55 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 23 March '18

Minor Planet Electronic Circulars

As of last check at 2325 UTC, there have been nine MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-F118 - "14:52 UT" - 2018 FQ4


MPEC 2018-F117 - "14:48 UT" - 2018 FP4


MPEC 2018-F116 - "14:44 UT" - 2018 FO4


MPEC 2018-F115 - "14:40 UT" - 2018 FN4


MPEC 2018-F114 - "14:36 UT" - 2018 FM4


MPEC 2018-F113 - "14:31 UT" - 2018 FL4


MPEC 2018-F112 - "14:27 UT" - 2018 FK4


MPEC 2018-F111 - "14:22 UT" - 2018 FJ4


<< DOU on 23 Mar. '18 >>  MPEC 2018-F110 - "12:04 UT" - Daily Orbit Update

Observers  on 23 March '18

A total of 31 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPECs 2018-F110, 2018-F114, 2018-F116 & 2018-F117 -- 2018 FZ3, 2018 FW3, 2018 FV3, 2018 FT3, 2018 FS3, 2018 FR3, 2018 FP4, 2018 FP3, 2018 FO4, 2018 FO3, 2018 FM4, 2018 FK3, 2018 FE3, 2018 FB4, 2018 EX2
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2018-F110 -- 85953
I47Auger Obs. in Argentina, 1 in MPEC 2018-F110 -- 2017 XB2
K46Bamberg Obs. in Germany, 1 in MPEC 2018-F110 -- 1036
Z84Calar Alto Schmidt in Spain, 2 in MPECs 2018-F110 & 2018-F118 -- 2018 FQ4, 2018 FE4
703Catalina Sky Survey (CSS) in Arizona, 27 in MPECs 2018-F110, 2018-F113 & 2018-F118 -- 2018 FQ4, 2018 FL4, 2018 FB, 2018 DX3, 2018 DH1, 2015 XE352, 1996 RY3, 85953, 53435, 511808, 505667, 443103, 385580, 38091, 358744, 25916, 172034, 162882, 15745, 154347, 12711, 9856, 8709, 7977, 6053, 2101, 1981
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 10 in MPECs 2018-F110, 2018-F113, 2018-F114, 2018-F115, 2018-F116, 2018-F117 & 2018-F118 -- 2018 FS1, 2018 FQ4, 2018 FP4, 2018 FO4, 2018 FN4, 2018 FM4, 2018 FL4, 2018 FE3, 2018 EO4, 2018 EL4
K51Celado Obs. in Italy, 1 in MPEC 2018-F110 -- 2018 EF4
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 21 in MPECs 2018-F110, 2018-F111, 2018-F114, 2018-F115, 2018-F116, 2018-F117 & 2018-F118 -- 2018 FY3, 2018 FY1, 2018 FX1, 2018 FU1, 2018 FU, 2018 FQ4, 2018 FP4, 2018 FO4, 2018 FN4, 2018 FM4, 2018 FJ4, 2018 FF2, 2018 FF1, 2018 FC2, 2018 FB2, 2018 EY, 2018 DJ4, 2018 DE2, 2018 CD1, 2018 AF4, 2017 YU7
K87Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2018-F110 -- 2018 FA1
238Grorudalen Obs. in Norway, 1 in MPEC 2018-F110 -- 1981
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-F110 -- 2018 FZ3
W79LCO Cerro Tololo Aqawan B#1 in Chile, 1 in MPEC 2018-F110 -- 2018 FV1
W87LCO Cerro Tololo C in Chile, 1 in MPEC 2018-F110 -- 2018 EB
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2018-F116, 2018-F117 & 2018-F118 -- 2018 FQ4, 2018 FP4, 2018 FO4
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2018-F110 -- 9856
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2018-F112 -- 2018 FK4
711McDonald Obs. in Texas, 3 in MPECs 2018-F112, 2018-F114 & 2018-F115 -- 2018 FN4, 2018 FM4, 2018 FK4
G96Mt. Lemmon Survey (MLS) in Arizona, 22 in MPECs 2018-F110, 2018-F113, 2018-F114, 2018-F115, 2018-F116 & 2018-F117 -- 2018 FY, 2018 FX1, 2018 FP4, 2018 FO4, 2018 FN4, 2018 FN3, 2018 FM4, 2018 FL4, 2018 FB2, 2018 EZ, 2018 EE4, 2018 DJ4, 2018 DH1, 2017 EV2, 2015 XE352, 2013 EY27, 1999 FN19, 204232, 154656, 4947, 3102, 1036
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPECs 2018-F110, 2018-F111 & 2018-F112 -- 2018 FK4, 2018 FJ4, 2018 DY3
D29Purple Mtn. Obs. Xuyi Station in China, 2 in MPEC 2018-F110 -- 508997, 505657
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-F110 -- 2018 EF1
C95SATINO-1 in France, 1 in MPEC 2018-F110 -- 2018 FF3
204Schiaparelli Obs. in Italy, 2 in MPECs 2018-F113 & 2018-F118 -- 2018 FQ4, 2018 FL4
033Schwarzschild Obs. in Germany, 2 in MPECs 2018-F110 & 2018-F115 -- 2018 FN4, 2018 FF3
W88!program code "!" (10) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2018-F110 -- 2015 PC228
587Sormano Obs. in Italy, 1 in MPEC 2018-F110 -- 2018 DH1
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2018-F111 -- 2018 FJ4
I52Steward Obs. Mt. Lemmon Station in Arizona, 11 in MPECs 2018-F110, 2018-F113, 2018-F116 & 2018-F118 -- 2018 FS1, 2018 FQ4, 2018 FQ1, 2018 FO4, 2018 FL4, 2018 FD, 2018 FB, 2018 EO4, 2018 EM4, 2018 EJ4, 2018 EE
A16Tentlingen Obs. in Switzerland, 1 in MPEC 2018-F110 -- 333888
L01Visnjan Obs., 1 in MPEC 2018-F115 -- 2018 FN4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 March '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2325 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 Sentry17002028-21171991.83589101e-05-5.75-6.400JPL: Computed at 09:45 today Pacific time based on 23 observations spanning .95915 days (2018-Mar-22.34023 to 2018-Mar-23.29938). Diameter approximately 0.015 km. from weighted mean H=26.82.
2018 FE4JPL Sentry16082073-2116382.6154614e-06-5.53-5.630JPL: Computed at 07:57 today Pacific time based on 16 observations spanning 2.5243 days (2018-Mar-20.4591 to 2018-Mar-22.98343). Diameter approximately 0.033 km. from weighted mean H=25.05.
2018 FA4NEODyS1608209125.06e-08-7.62-7.810NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2018-03-18.365 to 2018-03-22.276."
2018 FQ3NEODyS16082070-2118207.29e-06-7.12-7.69n/aNEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2018-03-20.385 to 2018-03-22.461."
2018 FE3JPL Sentry16082103-211826.4407e-06-6.69-6.690JPL: Computed at 08:07 today Pacific time based on 53 observations spanning 1.9884 days (2018-Mar-21.27141 to 2018-Mar-23.2598). Diameter approximately 0.013 km. from weighted mean H=27.14.
NEODyS16082039-2118101.6e-06-7.27-7.36n/aNEODyS: "Based on 48 optical observations (of which 3 are rejected as outliers) from 2018-03-21.272 to 2018-03-22.122."
2018 FY2NEODyS16082046-2111152.51e-07-6.62-6.870NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2018-03-19.356 to 2018-03-21.273."
2018 FC2JPL Sentry16082099-209913.924e-07-6.50-6.500JPL: Computed at 07:52 today Pacific time based on 22 observations spanning 3.8704 days (2018-Mar-18.58001 to 2018-Mar-22.45039). Diameter approximately 0.037 km. from weighted mean H=24.79.
NEODyS1608209912.55e-06-5.70-5.70NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2018-03-18.581 to 2018-03-22.451."
2018 FU1JPL Sentry16082049-2117544.57451622e-05-5.61-5.990JPL: Computed at 08:05 today Pacific time based on 21 observations spanning 3.9197 days (2018-Mar-18.47342 to 2018-Mar-22.39313). Diameter approximately 0.014 km. from weighted mean H=26.93.
NEODyS16082052-2118961.88e-05-5.95-6.53n/aNEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2018-03-18.474 to 2018-03-20.146."
2018 EE9NEODyS16082040-2118381.35e-05-5.58-6.22n/aNEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2018-03-12.667 to 2018-03-22.237."
2018 EL4JPL Sentry16082110-211016.841e-08-7.67-7.670JPL: Computed at 07:46 today Pacific time based on 61 observations spanning 8.9924 days (2018-Mar-14.20994 to 2018-Mar-23.20237). Diameter approximately 0.032 km. from weighted mean H=25.12.
NEODyS16082101-211025.31e-08-7.76-7.970NEODyS: "Based on 58 optical observations (of which 0 are rejected as outliers) from 2018-03-14.211 to 2018-03-22.190."
2018 ED4NEODyS16082027-210864.43e-07-3.95-4.140NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2018-03-10.307 to 2018-03-22.177."
2016 FV13NEODyS1608R E M O V E D-
2015 RN35NEODyS1608R E M O V E D-
2014 OY391NEODyS16082022-2093501.56e-07-6.84-7.50NEODyS: "Based on 7 optical observations (of which 0 are rejected as outliers) from 2014-07-25.433 to 2014-07-26.399."
2014 MV67JPL Sentry16082019-202531.0978e-09-4.81-4.950JPL: Computed at 14:07 April 6th of 2017 Pacific time based on 7 observations spanning .93959 days (2014-Jun-24.38088 to 2014-Jun-25.32047). Diameter approximately 0.540 km. from weighted mean H=18.98.

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 23 March '18

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

1916Updated Traffic Report
1700Noted that JPL Sentry has posted 2018 FQ4 as an impact risk - see above
1608Noted that JPL Sentry has updated its 2014 MV67 risk assessment - see above
Noted that NEODyS has updated its 2014 OY391 risk assessment - see above
Noted that NEODyS has removed 2015 RN35 as an impact risk - see above
Noted that NEODyS has removed 2016 FV13 as an impact risk - see above
Noted that NEODyS has updated its 2018 ED4 risk assessment - see above
Noted that NEODyS has posted 2018 EE9 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 EL4 risk assessment - see above
Noted that NEODyS has updated its 2018 EL4 risk assessment - see above
Noted that NEODyS has posted 2018 FA4 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 FC2 risk assessment - see above
Noted that NEODyS has posted 2018 FC2 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 FE3 risk assessment - see above
Noted that NEODyS has posted 2018 FE3 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 FE4 risk assessment - see above
Noted that NEODyS has posted 2018 FQ3 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 FU1 risk assessment - see above
Noted that NEODyS has posted 2018 FU1 as an impact risk - see above
Noted that NEODyS has posted 2018 FY2 as an impact risk - see above
Grabbed MPEC 2018-F110 - Daily Orbit Update - see above
Grabbed MPEC 2018-F111 - 2018 FJ4 - see above
Grabbed MPEC 2018-F112 - 2018 FK4 - see above
Grabbed MPEC 2018-F113 - 2018 FL4 - see above
Grabbed MPEC 2018-F114 - 2018 FM4 - see above
Grabbed MPEC 2018-F115 - 2018 FN4 - see above
Grabbed MPEC 2018-F116 - 2018 FO4 - see above
Grabbed MPEC 2018-F117 - 2018 FP4 - see above
Grabbed MPEC 2018-F118 - 2018 FQ4 - see above