Contents  on 20 November '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 20 November '18

Fourteen objects reported inside ten LD

There are fourteen minor objects being tracked within ten lunar distances (LD) of Earth today. Nearest is risk-listed intruder 2018 WJ, which leaves the Earth-Moon system, flying off from 0.33 to 4.28 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
0.08 LD Nov. 16 2018 WG 5 m  7.74 to 10.15 LD Nov. 12 - 20 intruder, NHATS target, exits ten LD
0.31 LD yesterday 2018 WJ 11 m  0.33 to 4.28 LD Nov. 17 - 22 intruder today, exits Earth SOI, risk - DOU
0.50 LD Nov. 16 2018 WH 4 m  6.43 to 8.13 LD Nov. 10 - 22 intruder, NHATS target, risk - DOU
0.62 LD Nov. 18 2018 WE 7 m  4.11 to 6.94 LD Nov. 15 - 22 intruder, risk
0.87 LD Nov. 13 2018 VC7 11 m  6.70 to 7.66 LD Nov. 2 - 23 intruder, NHATS target, risk
1.95 LD Nov. 17 2018 VS8 12 m  6.10 to 8.08 LD Nov. 12 - 21
2.97 LD Nov. 16 2018 WV 27 m  6.99 to 8.69 LD Nov. 11 - 21 NEW - MPEC
3.50 LD Nov. 12 2018 VU8 9 m  9.59 to 10.72 LD Nov. 4 - 20 NHATS target, exits ten LD
3.92 LD Dec. 2 2018 TG6 12 m  5.06 from 5.24 LD Oct. 30 - Jan. 5 NHATS target
4.39 LD Nov. 18 2018 VH10 33 m  6.53 to 9.11 LD Nov. 15 - 21
6.77 LD Nov. 18 2018 WF 17 m  7.63 to 8.97 LD Nov. 15 - 21
7.63 LD today 2018 VP7 16 m  7.63 LD Nov. 15 - 25 NHATS target, Earth closest at 0748 UTC
8.21 LD Nov. 25 2018 VT7 9 m  8.58 from 8.75 LD Nov. 15 - Dec. 7 NHATS target
8.28 LD Nov. 18 2018 WU 41 m  9.16 to 10.42 LD Nov. 16 - 20 NEW, exits ten LD - MPEC

This report was generated at 2010 UTC with the discoveries of outbound objects 2018 WV (MPEC) and 2018 WU (MPEC), and with follow-up in today's DOU MPEC for approaching 2018 WD, outbound risk-listed intruders 2018 WJ and 2018 WH, departed objects 2018 VL3 and 2008 WS62, and distant 2015 TB145.

Approaching - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
4.53 LD Nov. 24 2018 WD 51 m  11.36 from 14.22 LD tomorrow - Nov. 27 DOU
7.4   LD Nov. 27* 2008 WD14 89 m  14.6 from 16.4 LD Nov. 23 - 30 EPU +/- 2.04 days*
2.6   LD Dec. 15* 2018 VO9 15 m  15.0 from 15.6 LD Nov. 29 - Dec. 31 EPU +/- 1.28 hours*, NHATS target, risk
4.1   LD Dec. 9* 2013 VX4 62 m  27.6 from 29.0 LD Dec. 3 - 15 EPU +/- 2.35 days*
7.84 LD Dec. 10 2001 XG1 74 m  63.54 from 67.04 LD Dec. 8 - 12
7.36 LD Dec. 22 163899 2003 SD220 1.17 km  41.70 from 42.87 LD Dec. 17 - 26 NHATS target
7.3   LD Jan. 9* 2013 YM2 19 m  47.2 from 48.1 LD Jan. 2 - 16 EPU +/- 1.25 days*, 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. "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.

Radar Astrometry  on 20 November '18

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 2030 UTC when the database was dated 20 Nov.

NEOCP Activity  on 20 November '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, seventeen were "one nighters." So far The Tracking News has counted a total of 39 listings on the NEOCP today.

New MPECs  on 20 November '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-W46 - "19:33 UT" - Comet C/2018 V1 (MacHholz-Fujikawa-Iwamoto)


MPEC 2018-W45 - "15:33 UT" - 2018 WV


MPEC 2018-W44 - "15:29 UT" - 2018 WW


MPEC 2018-W43 - "15:24 UT" - 2018 WU


MPEC 2018-W42 - "14:44 UT" - Comet C/2018 U1 (Lemmon)


<< DOU on 20 Nov. '18 >>  MPEC 2018-W41 - "13:09 UT" - Daily Orbit Update


MPEC 2018-W40 - "12:24 UT" - 2015 VY150


MPEC 2018-W39 - "03:30 UT" - 2000 DN1

Observers  on 20 November '18

A total of 58 observers appear in today's MPECs.

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2018-W41 -- 1627
251Arecibo in Puerto Rico, 1 in radar -- 163899
T05ATLAS Haleakala in Hawaii, 2 in MPEC 2018-W41 -- 2018 WD, 2018 WC
C77Bernezzo Obs. in Italy, 2 in MPECs 2018-W43 & 2018-W45 -- 2018 WV, 2018 WU
073Bucharest Obs. in Romania, 1 in MPEC 2018-W41 -- 144332
215Buchloe Obs. in Germany, 1 in MPEC 2018-W42 -- C/2018 U1
160Castelmartini Obs. in Italy, 4 in MPECs 2018-W41 & 2018-W45 -- 2018 WV, 250162, 159495, 3691
A77Chante-Perdrix Obs. in France, 1 in MPEC 2018-W46 -- C/2018 V1
970Chelmsford Obs. in England, 1 in MPEC 2018-W46 -- C/2018 V1
Z99Clixby Obs. in England, 2 in MPECs 2018-W43 & 2018-W45 -- 2018 WV, 2018 WU
850Cordell-Lorenz Obs. in Tennessee, 2 in MPECs 2018-W43 & 2018-W46 -- 2018 WU, C/2018 V1
N55Corona Borealis Obs. in Tibet, 1 in MPEC 2018-W46 -- C/2018 V1
K02Eastwood Obs. in England, 1 in MPEC 2018-W46 -- C/2018 V1
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2018-W42 -- C/2018 U1
734Farpoint Obs. in Kansas, 1 in MPEC 2018-W42 -- C/2018 U1
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2018-W43 & 2018-W45 -- 2018 WV, 2018 WU
E89Geyserland Obs. in New Zealand, 2 in MPEC 2018-W41 -- 88263, 4953
K88GINOP-KHK in Hungary, 1 in MPEC 2018-W42 -- C/2018 U1
J95Great Shefford Obs. in England, 4 in MPECs 2018-W42, 2018-W43, 2018-W44 & 2018-W45 -- 2018 WW, 2018 WV, 2018 WU, C/2018 U1
987Isle of Man Obs. on the Isle of Man, 1 in MPEC 2018-W46 -- C/2018 V1
U69#program code "#" (12) via iTelescope Obs. Auberry in northern California, 1 in MPEC 2018-W46 -- C/2018 V1
U69$Marian Urbanik in Slovakia via iTelescope Obs. Auberry in northern California, 1 in MPEC 2018-W46 -- C/2018 V1
U69&program code "&" (15) via iTelescope Obs. Auberry in northern California, 1 in MPEC 2018-W46 -- C/2018 V1
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-W46 -- C/2018 V1
H06#M. Suzuki in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-W46 -- C/2018 V1
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 2 in MPECs 2018-W42 & 2018-W46 -- C/2018 V1, C/2018 U1
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-W42 -- C/2018 U1
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 9 in MPEC 2018-W41 -- 2018 WH, 2018 VT6, 2018 VF1, 2018 SK3, 2017 BQ93, 2017 AN19, 2015 TB145, 2007 WF55, 516454
L12Koksijde Obs., 1 in MPEC 2018-W46 -- C/2018 V1
D95Kurihara Obs. in Japan, 1 in MPEC 2018-W46 -- C/2018 V1
K38M57 Obs. in Italy, 2 in MPECs 2018-W43 & 2018-W45 -- 2018 WV, 2018 WU
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2018-W40, 2018-W42, 2018-W43, 2018-W44 & 2018-W45 -- 2018 WW, 2018 WV, 2018 WU, C/2018 U1, 2015 VY150
C10Maisoncelles Obs. in France, 1 in MPEC 2018-W46 -- C/2018 V1
711McDonald Obs. in Texas, 1 in MPEC 2018-W42 -- C/2018 U1
118Modra Obs. in Slovakia, 1 in MPEC 2018-W42 -- C/2018 U1
G96Mt. Lemmon Survey (MLS) in Arizona, 36 in MPECs 2018-W41, 2018-W42, 2018-W43, 2018-W44 & 2018-W45 -- 2018 WW, 2018 WV, 2018 WU, C/2018 U1, 2018 JD5, 2012 VM6, 2011 UA, 2008 WX32, 99935, 68372, 65733, 55532, 53426, 52761, 523811, 523806, 523665, 523596, 523592, 480885, 457212, 443923, 414772, 397847, 380476, 34613, 292220, 18736, 173689, 163000, 162741, 162004, 138175, 100085, 6178, 1943
K74Muensterschwarzach Obs. in Germany, 2 in MPECs 2018-W41 & 2018-W46 -- C/2018 V1, 523815
Z80Northolt Branch Obs. in England, 4 in MPECs 2018-W41, 2018-W43 & 2018-W45 -- 2018 WV, 2018 WU, 2018 VT8, 2008 WS62
C23Olmen Obs. in Belgium, 1 in MPEC 2018-W46 -- C/2018 V1
F52Pan-STARRS 2 (PS2) in Hawaii, 7 in MPECs 2018-W40 & 2018-W41 -- 2018 VZ9, 2018 VY7, 2018 LW5, 2015 VY150, 2005 UF1, 1998 UM1, 308043
K63Pascoli Obs. in Italy, 3 in MPECs 2018-W42, 2018-W43 & 2018-W45 -- 2018 WV, 2018 WU, C/2018 U1
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 3 in MPECs 2018-W42, 2018-W43 & 2018-W45 -- 2018 WV, 2018 WU, C/2018 U1
104San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2018-W42, 2018-W43 & 2018-W45 -- 2018 WV, 2018 WU, C/2018 U1
H36Sandlot Obs. in Kansas, 3 in MPECs 2018-W42, 2018-W44 & 2018-W45 -- 2018 WW, 2018 WV, C/2018 U1
C95SATINO-1 in France, 4 in MPECs 2018-W41, 2018-W42, 2018-W43 & 2018-W45 -- 2018 WV, 2018 WU, 2018 WJ, C/2018 U1
204Schiaparelli Obs. in Italy, 1 in MPEC 2018-W46 -- C/2018 V1
033Schwarzschild Obs. in Germany, 1 in MPEC 2018-W42 -- C/2018 U1
Q11Shinshiro Obs., 1 in MPEC 2018-W46 -- C/2018 V1
G40(program code "(" (17) via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPECs 2018-W42 & 2018-W46 -- C/2018 V1, C/2018 U1
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-W46 -- C/2018 V1
587Sormano Obs. in Italy, 1 in MPEC 2018-W43 -- 2018 WU
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2018-W41 -- 2015 XQ55
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2018-W41 & 2018-W42 -- 2018 WP, 2018 VN5, 2018 VL8, 2018 VL3, 2018 VK10, C/2018 U1
W34Squirrel Valley Obs. in North Carolina, 2 in MPECs 2018-W43 & 2018-W45 -- 2018 WV, 2018 WU
I52Steward Obs. Mt. Lemmon Station in Arizona, 4 in MPECs 2018-W42, 2018-W43, 2018-W44 & 2018-W45 -- 2018 WW, 2018 WV, 2018 WU, C/2018 U1
Q23Sukagawa Obs., 1 in MPEC 2018-W46 -- C/2018 V1
I81Tarbatness Obs. in Scotland, 1 in MPEC 2018-W46 -- C/2018 V1
954Teide Obs. in the Canary Islands, 1 in MPEC 2018-W42 -- C/2018 U1
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-W41 -- 2016 BN1
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2018-W39 -- 2000 DN1
L01Visnjan Obs., 4 in MPECs 2018-W42, 2018-W43, 2018-W44 & 2018-W45 -- 2018 WW, 2018 WV, 2018 WU, C/2018 U1
718Wiggins Obs. in Utah, 2 in MPECs 2018-W43 & 2018-W45 -- 2018 WV, 2018 WU
C51WISE in Earth polar orbit, 3 in MPEC 2018-W41 -- 85774, 523631, 31345
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 November '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 and NEODyS listings is 100 years, and both post impact solutions beyond that for some 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 WSNEODyS18032030-210251.25e-06-6.29-6.320NEODyS: "Based on 29 optical observations (of which 1 are rejected as outliers) from 2018-11-18.424 to 2018-11-19.426."
2018 WRNEODyS1803211437.5e-09-9.10-9.150NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2018-11-18.409 to 2018-11-19.390."
2018 WPNEODyS18032057-211265.32e-08-4.83-5.020NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2018-11-17.398 to 2018-11-20.230."
JPL Sentry17072084-209421.1032e-08-5.37-5.560JPL: Computed at 07:21 today Pacific time based on 23 observations spanning 2.8327 days (2018-Nov-17.39701 to 2018-Nov-20.22968). Diameter approximately 0.290 km. from weighted mean H=20.34.
2018 WJNEODyS18032045-209679.68e-07-6.84-7.220NEODyS #2 for the day: "Based on 54 optical observations (of which 0 are rejected as outliers) from 2018-11-17.268 to 2018-11-19.242."
JPL Sentry17072045-205528.549e-07-6.85-7.130JPL: Computed at 07:22 today Pacific time based on 54 observations spanning 1.9737 days (2018-Nov-17.26735 to 2018-Nov-19.24108). Diameter approximately 0.011 km. from weighted mean H=27.49.
2018 WHNEODyS18032053-21184022.88e-04-6.16-7.17-NEODyS #2 for the day: "Based on 35 optical observations (of which 1 are rejected as outliers) from 2018-11-17.241 to 2018-11-20.331."
JPL Sentry17072053-21181770.0002481145494-6.20-7.150JPL: Computed at 07:31 today Pacific time based on 34 observations spanning 3.0797 days (2018-Nov-17.25041 to 2018-Nov-20.33009). Diameter approximately 0.004 km. from weighted mean H=29.84.
2018 WENEODyS17072057-2108163.16e-06-7.08-7.360NEODyS: "Based on 49 optical observations (of which 1 are rejected as outliers) from 2018-11-17.156 to 2018-11-17.976."
2018 VZ9JPL Sentry1707R E M O V E DJPL: Risk listing removed at 1516 UTC today
NEODyS1707R E M O V E D-
2018 VX8NEODyS1707R E M O V E D-
2018 VL8NEODyS1707R E M O V E D-
2018 VA8NEODyS17072098-2116713.01e-05-5.66-6.080NEODyS: "Based on 38 optical observations (of which 0 are rejected as outliers) from 2018-11-12.290 to 2018-11-19.431."
2018 VS6NEODyS17072083-2118441.26e-04-4.94-5.08-NEODyS: "Based on 83 optical observations (of which 0 are rejected as outliers) from 2018-11-09.545 to 2018-11-19.417."
2018 VP6NEODyS17072088-211642.29e-06-6.83-7.120NEODyS: "Based on 32 optical observations (of which 2 are rejected as outliers) from 2018-11-10.279 to 2018-11-19.471."
2018 VO6NEODyS17072048-209778.85e-05-3.47-3.480NEODyS: "Based on 53 optical observations (of which 0 are rejected as outliers) from 2018-11-05.411 to 2018-11-19.374."
2018 VP1NEODyS17072020-2067142.58e-03-4.07-4.070NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2018-11-03.273 to 2018-11-16.241."
2018 VCNEODyS17072108-2118185.0e-06-6.42-6.72-NEODyS: "Based on 131 optical observations (of which 0 are rejected as outliers) from 2018-11-01.250 to 2018-11-19.315."
2018 TBNEODyS1707210311.51e-06-6.06-6.060NEODyS: "Based on 195 optical observations (of which 1 are rejected as outliers) from 2018-10-02.423 to 2018-11-19.459."

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 20 November '18

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

2030Noted Radar Astrometry database update - see above
2010Updated Traffic Report
2000Grabbed MPEC 2018-W46 - Comet C/2018 V1 (MacHholz-Fujikawa-Iwamoto) - see above
1803Noted that NEODyS has updated its 2018 WH risk assessment - see above
Noted that NEODyS has updated its 2018 WJ risk assessment - see above
Noted that NEODyS has posted 2018 WP as an impact risk - see above
Noted that NEODyS has posted 2018 WR as an impact risk - see above
Noted that NEODyS has posted 2018 WS as an impact risk - see above
1707Noted that NEODyS has updated its 2018 TB risk assessment - see above
Noted that NEODyS has updated its 2018 VA8 risk assessment - see above
Noted that NEODyS has updated its 2018 VC risk assessment - see above
Noted that NEODyS has removed 2018 VL8 as an impact risk - see above
Noted that NEODyS has updated its 2018 VO6 risk assessment - see above
Noted that NEODyS has updated its 2018 VP1 risk assessment - see above
Noted that NEODyS has updated its 2018 VP6 risk assessment - see above
Noted that NEODyS has updated its 2018 VS6 risk assessment - see above
Noted that NEODyS has removed 2018 VX8 as an impact risk - see above
Noted that JPL Sentry has removed 2018 VZ9 as an impact risk - see above
Noted that NEODyS has removed 2018 VZ9 as an impact risk - see above
Noted that NEODyS has posted 2018 WE as an impact risk - see above
Noted that JPL Sentry has updated its 2018 WH risk assessment - see above
Noted that NEODyS has posted 2018 WH as an impact risk - see above
Noted that JPL Sentry has updated its 2018 WJ risk assessment - see above
Noted that NEODyS has posted 2018 WJ as an impact risk - see above
Noted that JPL Sentry has updated its 2018 WP risk assessment - see above
Grabbed MPEC 2018-W40 - 2015 VY150 - see above
Grabbed MPEC 2018-W41 - Daily Orbit Update - see above
Grabbed MPEC 2018-W42 - Comet C/2018 U1 (Lemmon) - see above
Grabbed MPEC 2018-W43 - 2018 WU - see above
Grabbed MPEC 2018-W44 - 2018 WW - see above
Grabbed MPEC 2018-W45 - 2018 WV - see above
0448Grabbed MPEC 2018-W39 - 2000 DN1 - see above