Contents  on 18 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 18 November '18

Eleven objects reported inside ten LD

Bulletin - 2221 UTC:  Six new discoveries of close passers have been announced.

Earth passageI D~Size~Inside ten LDNotes
0.08 LD at 1914 UTC Nov. 162018 WG5 m Nov. 12 - 21intruder - MPEC
0.31 LD at 2323 UTC tomorrow2018 WJ9 m yesterday - Nov. 23intruder - MPEC
0.50 LD at 0549 UTC Nov. 162018 WH4 m Nov. 10 - 22intruder - MPEC
0.62 LD at 1355 UTC today2018 WE7 m Nov. 14 - 22intruder - MPEC
4.53 LD at 0940 UTC Nov. 242018 WD51 m Nov. 21 - 28MPEC
6.77 LD at 1235 UTC today2018 WF17 m Nov. 15 - 22MPEC


There are eleven small celestial objects known to be inside ten lunar distances (LD) of Earth today. The three nearest are 2018 VS8, which moves out from 2.55 to 4.19 LD, newly announced 2018 VH10, which flies by us at 4.39 LD, and 2018 VC7, heading out from 4.81 to 5.75 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
0.52 LD Nov. 14 2018 VJ10 6 m  9.46 to 12.47 LD Nov. 11 - 18 NEW, intruder, exits ten LD - MPEC
0.87 LD Nov. 13 2018 VC7 11 m  4.81 to 5.75 LD Nov. 2 - 23 intruder, NHATS target, risk
0.99 LD Nov. 10 2018 VX1 11 m  9.70 to 11.02 LD Nov. 3 - 18 intruder, NHATS target, exits ten LD
1.95 LD yesterday 2018 VS8 12 m  2.55 to 4.19 LD Nov. 12 - 21 DOU
3.50 LD Nov. 12 2018 VU8 9 m  7.39 to 8.47 LD Nov. 4 - 20 NHATS target
3.61 LD Nov. 14 2018 VX5 25 m  7.96 to 9.66 LD Nov. 9 - 19
3.92 LD Dec. 2 2018 TG6 12 m  5.41 from 5.60 LD Oct. 30 - Jan. 5 NHATS target
4.11 LD Nov. 14 2018 VO3 14 m  7.86 to 9.37 LD Nov. 8 - 19 NHATS target
4.39 LD today 2018 VH10 33 m  4.39 LD Nov. 15 - 21 NEW, Earth closest at 1112 UTC - MPEC
7.63 LD Nov. 20 2018 VP7 15 m  7.82 from 8.18 LD Nov. 15 - 25 NHATS target
8.21 LD Nov. 25 2018 VT7 9 m  8.95 from 9.18 LD Nov. 15 - Dec. 7 NHATS target

This report was generated at 1910 UTC with the discoveries announced late yesterday of outbound intruder 2018 VJ10 (MPEC) and passing 2018 VH10 (MPEC). Today's DOU MPEC has follow-up for outbound 2018 VS8 and departed 2018 VB10.

Approaching - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
7.4   LD Nov. 27* 2008 WD14 89 m  18.2 from 20.1 LD Nov. 23 - 30 EPU +/- 2.04 days*
2.6   LD Dec. 15* 2018 VO9 15 m  16.1 from 16.7 LD Nov. 29 - Dec. 31 EPU +/- 1.28 hours*, NHATS target, risk
4.1   LD Dec. 9* 2013 VX4 62 m  30.3 from 31.7 LD Dec. 3 - 15 EPU +/- 2.35 days*
7.36 LD Dec. 22 163899 2003 SD220 1.17 km  44.04 from 45.19 LD Dec. 17 - 26 NHATS target
7.3   LD Jan. 9* 2013 YM2 19 m  48.9 from 49.7 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. 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 18 November '18

The MPC's NEO Confirmation Page has 51 listings

When last checked at 2357 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 51 objects listed. Of these, 30 were "one nighters." So far The Tracking News has counted a total of 61 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 18 November '18

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there have been ten MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-W25 - "22:09 UT" - 2018 VK10


MPEC 2018-W24 - "21:23 UT" - 2018 WG


MPEC 2018-W23 - "21:19 UT" - 2018 WF


MPEC 2018-W22 - "21:15 UT" - 2018 WE


MPEC 2018-W21 - "21:10 UT" - 2018 WJ


MPEC 2018-W20 - "21:06 UT" - 2018 WH


MPEC 2018-W19 - "21:01 UT" - 2018 WD


MPEC 2018-W18 - "17:34 UT" - Comet P/2018 VN2 (Leonard)


<< DOU on 18 Nov. '18 >>  MPEC 2018-W17 - "13:06 UT" - Daily Orbit Update


MPEC 2018-W16 - "12:54 UT" - 2013 VE13

Observers  on 18 November '18

A total of 38 observers appear in today's MPECs.

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2018-W17 -- 4953
E23Arcadia Obs. in New South Wales, 1 in MPEC 2018-W19 -- 2018 WD
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2018-W24 & 2018-W25 -- 2018 WG, 2018 VK10
Q68Blue Mountains Obs. in New South Wales, 1 in MPEC 2018-W17 -- 455550
160Castelmartini Obs. in Italy, 3 in MPEC 2018-W17 -- 2018 RL, 523815, 18109
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2018-W20 & 2018-W24 -- 2018 WH, 2018 WG
Z99Clixby Obs. in England, 1 in MPEC 2018-W23 -- 2018 WF
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2018-W23 -- 2018 WF
113Drebach Obs. in Germany, 3 in MPECs 2018-W22, 2018-W23 & 2018-W24 -- 2018 WG, 2018 WF, 2018 WE
X31Galilei Obs., 2 in MPECs 2018-W19 & 2018-W24 -- 2018 WG, 2018 WD
E89Geyserland Obs. in New Zealand, 2 in MPEC 2018-W17 -- 4953, 1627
K88GINOP-KHK in Hungary, 3 in MPECs 2018-W18, 2018-W23 & 2018-W24 -- 2018 WG, 2018 WF, P/2018 VN2
J95Great Shefford Obs. in England, 7 in MPECs 2018-W17, 2018-W20, 2018-W21, 2018-W22, 2018-W23 & 2018-W24 -- 2018 WJ, 2018 WH, 2018 WG, 2018 WF, 2018 WE, 2018 WC, 2018 VS8
H06#M. Suzuki in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-W24 -- 2018 WG
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-W18 -- P/2018 VN2
585Kiev Comet Station in Ukraine, 2 in MPECs 2018-W22 & 2018-W24 -- 2018 WG, 2018 WE
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 5 in MPEC 2018-W17 -- 2018 NN4, 2018 LM5, 2016 JG12, 2007 VG, 2005 EA
246KLENOT in the Czech Republic, 6 in MPECs 2018-W17, 2018-W22, 2018-W23 & 2018-W24 -- 2018 WG, 2018 WF, 2018 WE, 2018 VT8, 2018 QN1, 2009 SV17
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2018-W19, 2018-W20, 2018-W22, 2018-W23 & 2018-W24 -- 2018 WH, 2018 WG, 2018 WF, 2018 WE, 2018 WD
711McDonald Obs. in Texas, 1 in MPEC 2018-W17 -- 2018 VZ3
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2018-W16, 2018-W17, 2018-W18, 2018-W19, 2018-W20, 2018-W21, 2018-W22, 2018-W23 & 2018-W24 -- 2018 WJ, 2018 WH, 2018 WG, 2018 WF, 2018 WE, 2018 WD, P/2018 VN2, 2013 VE13, 523824
C47Nonndorf Obs. in Austria, 4 in MPECs 2018-W17 & 2018-W24 -- 2018 WG, 2018 TT1, 2018 RL, 2018 QN1
J69North Obs. in England, 1 in MPEC 2018-W17 -- 2018 VT8
Z80Northolt Branch Obs. in England, 2 in MPECs 2018-W22 & 2018-W23 -- 2018 WF, 2018 WE
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2018-W18 -- P/2018 VN2
K63Pascoli Obs. in Italy, 1 in MPEC 2018-W21 -- 2018 WJ
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 5 in MPECs 2018-W17, 2018-W20, 2018-W23 & 2018-W24 -- 2018 WH, 2018 WG, 2018 WF, 2018 VY7, 2018 UJ1
247roving observer, 1 in MPEC 2018-W25 -- 2018 VK10
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2018-W21 & 2018-W22 -- 2018 WJ, 2018 WE
H36Sandlot Obs. in Kansas, 1 in MPEC 2018-W25 -- 2018 VK10
C95SATINO-1 in France, 5 in MPECs 2018-W17, 2018-W20, 2018-W22, 2018-W23 & 2018-W24 -- 2018 WH, 2018 WG, 2018 WF, 2018 WE, 2002 VE68
033Schwarzschild Obs. in Germany, 1 in MPEC 2018-W25 -- 2018 VK10
587Sormano Obs. in Italy, 4 in MPECs 2018-W20, 2018-W22, 2018-W23 & 2018-W24 -- 2018 WH, 2018 WG, 2018 WF, 2018 WE
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2018-W17 & 2018-W25 -- 2018 VM3, 2018 VK10, 2018 RR7, 2013 TB80
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2018-W17 & 2018-W25 -- 2018 VO6, 2018 VK10, 2016 CS29
W34Squirrel Valley Obs. in North Carolina, 2 in MPEC 2018-W17 -- 88263, 170891
I52Steward Obs. Mt. Lemmon Station in Arizona, 15 in MPECs 2018-W16, 2018-W17, 2018-W18, 2018-W19, 2018-W21, 2018-W22, 2018-W23 & 2018-W24 -- 2018 WJ, 2018 WG, 2018 WF, 2018 WE, 2018 WD, 2018 VY8, 2018 VX8, 2018 VT3, P/2018 VN2, 2018 VL8, 2018 VB10, 2018 TW, 2018 GX4, 2016 JN34, 2013 VE13
L01Visnjan Obs., 5 in MPECs 2018-W20, 2018-W22, 2018-W23, 2018-W24 & 2018-W25 -- 2018 WH, 2018 WG, 2018 WF, 2018 WE, 2018 VK10
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 18 November '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2357 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 WJJPL Sentry23382055-209624.881e-07-7.38-7.530JPL: Computed at 14:29 today Pacific time based on 25 observations spanning 1.5812 days (2018-Nov-17.26735 to 2018-Nov-18.84856). Diameter approximately 0.010 km. from weighted mean H=27.70.
2018 WHJPL Sentry23382053-21181380.0003278567742-6.08-6.790JPL: Computed at 14:38 today Pacific time based on 28 observations spanning 1.0795 days (2018-Nov-17.25041 to 2018-Nov-18.32991). Diameter approximately 0.004 km. from weighted mean H=29.86.
2018 WEJPL Sentry23382057-209781.18235e-06-7.48-7.770JPL: Computed at 14:30 today Pacific time based on 45 observations spanning .81496 days (2018-Nov-17.16056 to 2018-Nov-17.97552). Diameter approximately 0.007 km. from weighted mean H=28.32.
2018 VX8JPL Sentry1730R E M O V E DJPL: Risk listing removed at 1515 UTC today
NEODyS17302060-210641.43e-09-7.51-7.550NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2018-11-10.434 to 2018-11-17.401."
2018 VQ8NEODyS1730R E M O V E D-
2018 VL8JPL Sentry17302033-203311.153e-09-7.19-7.190JPL: Computed at 07:10 today Pacific time based on 42 observations spanning 7.9132 days (2018-Nov-10.20912 to 2018-Nov-18.12229). Diameter approximately 0.092 km. from weighted mean H=22.83.
NEODyS1730203311.63e-07-5.02-5.020NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2018-11-10.210 to 2018-11-17.157."
2018 VA8NEODyS17302098-2116693.37e-05-5.62-6.040NEODyS: "Based on 35 optical observations (of which 0 are rejected as outliers) from 2018-11-12.290 to 2018-11-16.337."
2018 VS6NEODyS17302083-2118481.26e-04-4.94-5.08-NEODyS: "Based on 77 optical observations (of which 0 are rejected as outliers) from 2018-11-09.545 to 2018-11-17.443."
2018 VO6JPL Sentry17302048-205948.1876923e-05-3.48-3.490JPL: Computed at 07:12 today Pacific time based on 50 observations spanning 12.806 days (2018-Nov-05.410654 to 2018-Nov-18.2171). Diameter approximately 0.048 km. from weighted mean H=24.25.
NEODyS17302048-207057.36e-05-3.55-3.580NEODyS: "Based on 47 optical observations (of which 0 are rejected as outliers) from 2018-11-05.411 to 2018-11-17.245."
2018 VCNEODyS17302108-2118154.73e-06-6.46-6.72-NEODyS: "Based on 128 optical observations (of which 0 are rejected as outliers) from 2018-11-01.250 to 2018-11-16.303."
2018 UM1NEODyS1730R E M O V E D-
2018 TG6NEODyS1730R E M O V E D-
2016 SA2NEODyS17302109-2118121.69e-04-5.76-5.99-NEODyS: "Based on 69 optical observations (of which 5 are rejected as outliers) from 2016-09-26.274 to 2016-10-09.271."

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 18 November '18

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

2357Grabbed MPEC 2018-W25 - 2018 VK10 - see above
2338Noted that JPL Sentry has posted 2018 WE as an impact risk - see above
Noted that JPL Sentry has posted 2018 WH as an impact risk - see above
Noted that JPL Sentry has posted 2018 WJ as an impact risk - see above
2130Grabbed MPEC 2018-W19 - 2018 WD - see above
Grabbed MPEC 2018-W20 - 2018 WH - see above
Grabbed MPEC 2018-W21 - 2018 WJ - see above
Grabbed MPEC 2018-W22 - 2018 WE - see above
Grabbed MPEC 2018-W23 - 2018 WF - see above
Grabbed MPEC 2018-W24 - 2018 WG - see above
1910Generated Traffic Report
1801Grabbed MPEC 2018-W18 - Comet P/2018 VN2 (Leonard) - see above
1730Noted that NEODyS has updated its 2016 SA2 risk assessment - see above
Noted that NEODyS has removed 2018 TG6 as an impact risk - see above
Noted that NEODyS has removed 2018 UM1 as an impact risk - 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 JPL Sentry has updated its 2018 VL8 risk assessment - see above
Noted that NEODyS has updated its 2018 VL8 risk assessment - see above
Noted that JPL Sentry has updated its 2018 VO6 risk assessment - see above
Noted that NEODyS has updated its 2018 VO6 risk assessment - see above
Noted that NEODyS has removed 2018 VQ8 as an impact risk - see above
Noted that NEODyS has updated its 2018 VS6 risk assessment - see above
Noted that JPL Sentry has removed 2018 VX8 as an impact risk - see above
Noted that NEODyS has updated its 2018 VX8 risk assessment - see above
Grabbed MPEC 2018-W16 - 2013 VE13 - see above
Grabbed MPEC 2018-W17 - Daily Orbit Update - see above