Contents  on 19 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 19 November '18

Fourteen objects reported inside ten LD

There are fourteen minor planets reported inside ten lunar distances (LD) of our home world today. The two closest are both newly announced risk-listed intruders. 2018 WJ zipped past us at 0.31 LD today and 2018 WE leaves Earth's sphere of gravitational influence, traveling outward from 1.36 to 4.11 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  5.33 to 7.74 LD Nov. 12 - 20 NEW, intruder, NHATS target - MPEC, DOU
0.31 LD today 2018 WJ 11 m  0.31 LD Nov. 17 - 22 NEW, intruder today, Moon closest 0.89 LD at 1849 UTC, Earth closest at 2322 UTC, risk - MPEC, DOU
0.50 LD Nov. 16 2018 WH 4 m  4.74 to 6.43 LD Nov. 10 - 22 NEW, intruder, NHATS target, risk - MPEC, DOU
0.62 LD yesterday 2018 WE 7 m  1.36 to 4.11 LD Nov. 15 - 22 NEW, intruder, exits Earth SOI, risk - MPEC, DOU
0.87 LD Nov. 13 2018 VC7 11 m  5.75 to 6.70 LD Nov. 2 - 23 intruder, NHATS target, risk
1.95 LD Nov. 17 2018 VS8 12 m  4.19 to 6.10 LD Nov. 12 - 21
3.50 LD Nov. 12 2018 VU8 9 m  8.47 to 9.59 LD Nov. 4 - 20 NHATS target
3.61 LD Nov. 14 2018 VX5 25 m  9.66 to 11.41 LD Nov. 9 - 19 exits ten LD
3.92 LD Dec. 2 2018 TG6 12 m  5.24 from 5.41 LD Oct. 30 - Jan. 5 NHATS target
4.11 LD Nov. 14 2018 VO3 14 m  9.37 to 10.95 LD Nov. 8 - 19 NHATS target, exits ten LD, risk
4.39 LD yesterday 2018 VH10 33 m  4.70 to 6.53 LD Nov. 15 - 21
6.77 LD yesterday 2018 WF 17 m  6.86 to 7.63 LD Nov. 15 - 21 NEW - MPEC, DOU
7.63 LD tomorrow 2018 VP7 16 m  7.64 from 7.81 LD Nov. 15 - 25 NHATS target - DOU
8.21 LD Nov. 25 2018 VT7 9 m  8.75 from 8.95 LD Nov. 15 - Dec. 7 NHATS target

This report was generated at 2349 UTC with six discoveries from late yesterday (one approaching, the others outbound) and, from today, three discoveries that have already departed plus the recovery of approaching 2001 XG1 (MPEC). See the the active traffic tables here for details of yesterday's discoveries, with four intruders including 2018 WG (MPEC, DOU), which skimmed past us at 0.080 LD on November 16th. Today's discoveries are departed objects 2018 WK (MPEC), which went by at about 8.21 LD on November 10th, 2018 WR (MPEC), going by at about 6.74 LD on the next day, and risk-listed 2018 WS (MPEC), which is calculated with several hours uncertainty to have gone by us at 1.7 LD and the Moon at 0.8 LD during 3-4 November. Today's DOU MPEC has follow-up for five of yesterday's discoveries plus inbound 2018 VP7 and ten departed objects: 2018 WA, 2018 VB10, 2018 VR6, 2018 VL3, and including six risk-listed objects: 2018 VA8, 2018 VS6, 2018 VP6, 2018 VC, 2018 TB, and intruder 2018 VP1, plus astrometry from April 2017 for 2017 FT102, which passed both our planet and the Moon by just over one LD during that apparition.

Approaching - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
4.5   LD Nov. 24* 2018 WD 51 m  14.2 from 17.2 LD Nov. 21 - 27 NEW, EPU +/- 8 mins.* - MPEC
7.4   LD Nov. 27* 2008 WD14 89 m  16.4 from 18.2 LD Nov. 23 - 30 EPU +/- 2.04 days*
2.6   LD Dec. 15* 2018 VO9 15 m  15.6 from 16.1 LD Nov. 29 - Dec. 31 EPU +/- 1.28 hours*, NHATS target, risk
4.1   LD Dec. 9* 2013 VX4 62 m  29.0 from 30.3 LD Dec. 3 - 15 EPU +/- 2.35 days*
7.84 LD Dec. 10 2001 XG1 74 m  67.04 from 70.58 LD Dec. 8 - 12 NEW - MPEC
7.36 LD Dec. 22 163899 2003 SD220 1.17 km  42.87 from 44.04 LD Dec. 17 - 26 NHATS target
7.3   LD Jan. 9* 2013 YM2 19 m  48.1 from 48.9 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 19 November '18

The MPC's NEO Confirmation Page has 38 listings

When last checked at 2321 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 38 objects listed. Of these, 24 were "one nighters." The Tracking News counted a total of 59 listings on the NEOCP on this day.

New MPECs  on 19 November '18

Minor Planet Electronic Circulars

There were thirteen MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-W38 - "16:42 UT" - 2018 WS


MPEC 2018-W37 - "16:30 UT" - 2018 WR


MPEC 2018-W36 - "16:26 UT" - 2018 WQ


MPEC 2018-W35 - "16:21 UT" - 2018 WP


MPEC 2018-W34 - "16:17 UT" - 2018 WO


MPEC 2018-W33 - "16:14 UT" - 2018 WN


MPEC 2018-W32 - "16:10 UT" - 2018 WM


MPEC 2018-W31 - "16:01 UT" - 2018 WL


MPEC 2018-W30 - "15:57 UT" - 2018 WK


MPEC 2018-W29 - "15:47 UT" - 2001 XG1


MPEC 2018-W28 - "14:43 UT" - 2016 VH2


<< DOU on 19 Nov. '18 >>  MPEC 2018-W27 - "13:08 UT" - Daily Orbit Update


MPEC 2018-W26 - "03:11 UT" - 2011 NY

Observers  on 19 November '18

A total of 31 observers appeared in this day's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPEC 2018-W27 -- 2018 VS6, 2018 VR6, 2018 VQ6, 2018 VP6, 2018 VG6
073Bucharest Obs. in Romania, 2 in MPEC 2018-W27 -- 418929, 155140
160Castelmartini Obs. in Italy, 9 in MPEC 2018-W27 -- 2009 SV17, 457260, 36284, 265661, 208617, 18109, 17274, 16834, 154656
703Catalina Sky Survey (CSS) in Arizona, 32 in MPECs 2018-W27 & 2018-W36 -- 2018 WQ, 2018 WJ, 2015 UC67, 96590, 55532, 54401, 523811, 523621, 455550, 443923, 442742, 438429, 413002, 397847, 375505, 32906, 308043, 21088, 20790, 18736, 17274, 170891, 16834, 163902, 155334, 153591, 12538, 7358, 6456, 5797, 5143, 5131
309&Marco Micheli via Cerro Paranal in Chile, 1 in MPEC 2018-W27 -- 2018 VP1
Z99Clixby Obs. in England, 2 in MPEC 2018-W27 -- 2018 WG, 2018 WE
L05Dridri Obs. in Italy, 1 in MPEC 2018-W27 -- 88263
K88GINOP-KHK in Hungary, 3 in MPEC 2018-W27 -- 2018 TX5, 2018 PS23, 3200
J95Great Shefford Obs. in England, 9 in MPECs 2018-W27, 2018-W29, 2018-W34, 2018-W35, 2018-W36, 2018-W37 & 2018-W38 -- 2018 WS, 2018 WR, 2018 WQ, 2018 WP, 2018 WO, 2018 WJ, 2018 WF, 2018 VP7, 2001 XG1
Q67JBL Obs., 1 in MPEC 2018-W27 -- 99799
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 15 in MPEC 2018-W27 -- 2018 WH, 2018 VX8, 2018 VS6, 2018 VP6, 2018 VO6, 2018 VL8, 2018 VC, 2018 VA8, 2018 VA, 2018 TO6, 2018 TM6, 2018 TB, 2018 MQ5, 2016 JG12, 2012 BN11
950~program code "~" (34) via La Palma in the Canary Islands, 1 in MPEC 2018-W27 -- 2017 FT102
K38M57 Obs. in Italy, 1 in MPEC 2018-W36 -- 2018 WQ
H01Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPECs 2018-W30, 2018-W31, 2018-W33, 2018-W34, 2018-W37 & 2018-W38 -- 2018 WS, 2018 WR, 2018 WO, 2018 WN, 2018 WL, 2018 WK
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2018-W28, 2018-W29, 2018-W30, 2018-W31, 2018-W32, 2018-W33, 2018-W34, 2018-W35, 2018-W37 & 2018-W38 -- 2018 WS, 2018 WR, 2018 WP, 2018 WO, 2018 WN, 2018 WM, 2018 WL, 2018 WK, 2016 VH2, 2001 XG1
J69North Obs. in England, 1 in MPEC 2018-W27 -- 2018 WJ
Z80Northolt Branch Obs. in England, 3 in MPEC 2018-W27 -- 2018 WJ, 2018 WC, 2018 QN1
J43Oukaimeden Obs. in Morocco, 5 in MPEC 2018-W27 -- 2014 XR6, 2011 KN9, 224926, 12538, 3288
K63Pascoli Obs. in Italy, 1 in MPEC 2018-W36 -- 2018 WQ
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 2 in MPECs 2018-W32 & 2018-W38 -- 2018 WS, 2018 WM
247roving observer, 1 in MPEC 2018-W36 -- 2018 WQ
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-W36 -- 2018 WQ
H36Sandlot Obs. in Kansas, 2 in MPECs 2018-W29 & 2018-W38 -- 2018 WS, 2001 XG1
C95SATINO-1 in France, 2 in MPECs 2018-W27 & 2018-W34 -- 2018 WO, 12538
587Sormano Obs. in Italy, 1 in MPEC 2018-W34 -- 2018 WO
291Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2018-W27 -- 2018 VX6, 2018 VN5, 2018 VL3, 2018 VG3, 2018 VB5, 2011 EF17
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2018-W27 -- 2018 WJ
I52Steward Obs. Mt. Lemmon Station in Arizona, 32 in MPECs 2018-W27, 2018-W28, 2018-W29, 2018-W30, 2018-W31, 2018-W32, 2018-W33, 2018-W34, 2018-W35, 2018-W36, 2018-W37 & 2018-W38 -- 2018 WS, 2018 WR, 2018 WQ, 2018 WP, 2018 WO, 2018 WN, 2018 WM, 2018 WL, 2018 WK, 2018 WA, 2018 VZ9, 2018 VZ3, 2018 VY7, 2018 VW5, 2018 VW1, 2018 VR9, 2018 VQ8, 2018 VQ3, 2018 VP9, 2018 VN5, 2018 VL8, 2018 VJ5, 2018 VH2, 2018 VG8, 2018 VE5, 2018 VE4, 2018 VB10, 2018 VA10, 2018 UG3, 2016 VH2, 2007 UL12, 2001 XG1
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-W26 -- 2011 NY
L01Visnjan Obs., 7 in MPECs 2018-W29, 2018-W30, 2018-W34, 2018-W35, 2018-W36, 2018-W37 & 2018-W38 -- 2018 WS, 2018 WR, 2018 WQ, 2018 WP, 2018 WO, 2018 WK, 2001 XG1
718Wiggins Obs. in Utah, 1 in MPEC 2018-W27 -- 2018 WJ
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 November '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2321 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 WSJPL Sentry18302026-209282.470838e-06-6.13-6.450JPL: Computed at 10:03 today Pacific time based on 28 observations spanning 1.0016 days (2018-Nov-18.42348 to 2018-Nov-19.42513). Diameter approximately 0.017 km. from weighted mean H=26.47.
2018 WPJPL Sentry18302053-2098101.66354e-08-5.20-5.710JPL: Computed at 09:31 today Pacific time based on 20 observations spanning 1.9015 days (2018-Nov-17.39701 to 2018-Nov-19.2985). Diameter approximately 0.288 km. from weighted mean H=20.35.
2018 WJJPL Sentry17002045-205528.537e-07-6.84-7.110JPL: Computed at 07:56 today Pacific time based on 50 observations spanning 1.9737 days (2018-Nov-17.26735 to 2018-Nov-19.24108). Diameter approximately 0.011 km. from weighted mean H=27.46.
2018 WHJPL Sentry17002053-21181670.000525801102-5.88-6.140JPL: Computed at 08:04 today Pacific time based on 31 observations spanning 1.9731 days (2018-Nov-17.25041 to 2018-Nov-19.22353). Diameter approximately 0.004 km. from weighted mean H=29.84.
2018 WEJPL Sentry17002057-209781.44066e-06-7.39-7.650JPL: Computed at 08:15 today Pacific time based on 48 observations spanning .81496 days (2018-Nov-17.16056 to 2018-Nov-17.97552). Diameter approximately 0.007 km. from weighted mean H=28.33.
2018 VZ9JPL Sentry17002091-209111.458e-10-6.47-6.470JPL: Computed at 08:05 today Pacific time based on 28 observations spanning 12.010 days (2018-Nov-07.44256 to 2018-Nov-19.45284). Diameter approximately 0.880 km. from weighted mean H=17.93.
2018 VL8JPL Sentry1700R E M O V E DJPL: Risk listing removed at 1553 UTC today
NEODyS1721203317.29e-08-5.40-5.40NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2018-11-10.210 to 2018-11-18.123."
2018 VA8JPL Sentry17002099-2116243.266396e-05-5.59-5.970JPL: Computed at 07:54 today Pacific time based on 38 observations spanning 7.1414 days (2018-Nov-12.28874 to 2018-Nov-19.43017). Diameter approximately 0.014 km. from weighted mean H=26.85.
2018 VS6JPL Sentry19382083-2118180.000117611012-4.96-5.090JPL #2 for the day: Computed at 11:05 today Pacific time based on 83 observations spanning 9.8715 days (2018-Nov-09.544497 to 2018-Nov-19.41595). Diameter approximately 0.014 km. from weighted mean H=26.86.
2018 VP6JPL Sentry17002088-208822.84e-06-6.72-6.960JPL: Computed at 07:47 today Pacific time based on 32 observations spanning 9.1919 days (2018-Nov-10.2782 to 2018-Nov-19.47006). Diameter approximately 0.013 km. from weighted mean H=27.16.
2018 VO6NEODyS17212048-206188.83e-05-3.47-3.490NEODyS: "Based on 50 optical observations (of which 0 are rejected as outliers) from 2018-11-05.411 to 2018-11-18.218."
JPL Sentry17002048-205437.8625222e-05-3.51-3.520JPL: Computed at 07:51 today Pacific time based on 53 observations spanning 13.963 days (2018-Nov-05.410654 to 2018-Nov-19.37345). Diameter approximately 0.047 km. from weighted mean H=24.27.
2018 VO3NEODyS17152021-2116231.74e-07-8.09-8.650NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2018-11-10.490 to 2018-11-12.774."
2018 VP1JPL Sentry17002020-202530.0040785895-3.86-3.860JPL: Computed at 07:31 today Pacific time based on 21 observations spanning 12.968 days (2018-Nov-03.272495 to 2018-Nov-16.240265). Diameter approximately 0.002 km. from weighted mean H=30.85.
2018 VCNEODyS17212108-2118154.72e-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."
JPL Sentry17002108-211897.7624e-06-6.22-6.520JPL: Computed at 07:36 today Pacific time based on 131 observations spanning 18.066 days (2018-Nov-01.24873 to 2018-Nov-19.31466). Diameter approximately 0.018 km. from weighted mean H=26.31.
2018 TBJPL Sentry17002103-210311.046e-06-6.21-6.210JPL: Computed at 07:29 today Pacific time based on 189 observations spanning 48.036 days (2018-Oct-02.42196 to 2018-Nov-19.45773). Diameter approximately 0.037 km. from weighted mean H=24.82.

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 19 November '18

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

2349Generated Traffic Report
1938Noted that JPL Sentry has updated its 2018 VS6 risk assessment - see above
1830Noted that JPL Sentry has posted 2018 WP as an impact risk - see above
Noted that JPL Sentry has posted 2018 WS as an impact risk - see above
1721Noted that NEODyS has updated its 2018 VC risk assessment - see above
Noted that NEODyS has updated its 2018 VL8 risk assessment - see above
Noted that NEODyS has updated its 2018 VO6 risk assessment - see above
1715Noted that NEODyS has posted 2018 VO3 as an impact risk - see above
1700Noted that JPL Sentry has updated its 2018 TB risk assessment - see above
Noted that JPL Sentry has updated its 2018 VA8 risk assessment - see above
Noted that JPL Sentry has updated its 2018 VC risk assessment - see above
Noted that JPL Sentry has removed 2018 VL8 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 VO6 risk assessment - see above
Noted that JPL Sentry has updated its 2018 VP1 risk assessment - see above
Noted that JPL Sentry has updated its 2018 VP6 risk assessment - see above
Noted that JPL Sentry has updated its 2018 VS6 risk assessment - see above
Noted that JPL Sentry has updated its 2018 VZ9 risk assessment - see above
Noted that JPL Sentry has updated its 2018 WE risk assessment - see above
Noted that JPL Sentry has updated its 2018 WH risk assessment - see above
Noted that JPL Sentry has updated its 2018 WJ risk assessment - see above
Grabbed MPEC 2018-W27 - Daily Orbit Update - see above
Grabbed MPEC 2018-W28 - 2016 VH2 - see above
Grabbed MPEC 2018-W29 - 2001 XG1 - see above
Grabbed MPEC 2018-W30 - 2018 WK - see above
Grabbed MPEC 2018-W31 - 2018 WL - see above
Grabbed MPEC 2018-W32 - 2018 WM - see above
Grabbed MPEC 2018-W33 - 2018 WN - see above
Grabbed MPEC 2018-W34 - 2018 WO - see above
Grabbed MPEC 2018-W35 - 2018 WP - see above
Grabbed MPEC 2018-W36 - 2018 WQ - see above
Grabbed MPEC 2018-W37 - 2018 WR - see above
Grabbed MPEC 2018-W38 - 2018 WS - see above
0520Grabbed MPEC 2018-W26 - 2011 NY - see above