Contents  on 15 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 15 November '18

Nineteen objects reported inside ten LD

Nineteen minor objects are reported flying inside ten lunar distances (LD) of Earth today. The two nearest are risk-listed intruder 2018 VC7, which exits Earth's SOI, traveling from 2.04 to 2.94 LD, and 2018 VS8, moving in from 4.95 to 3.16 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
0.87 LD Nov. 13 2018 VC7 11 m  2.04 to 2.94 LD Nov. 2 - 23 intruder, NHATS target, exits Earth SOI, risk
0.99 LD Nov. 10 2018 VX1 11 m  5.74 to 7.05 LD Nov. 3 - 18 intruder, NHATS target
1.86 LD Nov. 12 2018 VN6 8 m  7.46 to 10.57 LD Nov. 9 - 15 exits ten LD
1.87 LD Nov. 9 2018 VA2 13 m  9.04 to 10.50 LD Nov. 2 - 15 NHATS target, exits ten LD
1.95 LD Nov. 17 2018 VS8 13 m  3.16 from 4.95 LD Nov. 12 - 21 DOU
3.13 LD Nov. 11 2018 VA4 8 m  6.03 to 7.50 LD Nov. 6 - 17 NHATS target
3.50 LD Nov. 12 2018 VU8 9 m  4.53 to 5.38 LD Nov. 4 - 20 NHATS target - DOU
3.61 LD yesterday 2018 VX5 26 m  3.91 to 4.94 LD Nov. 9 - 19
3.93 LD Dec. 2 2018 TG6 12 m  5.99 from 6.19 LD Oct. 30 - Jan. 5 NHATS target, risk
4.11 LD yesterday 2018 VO3 14 m  4.39 to 5.25 LD Nov. 8 - 19 NHATS target
5.93 LD Nov. 11 2018 VH5 12 m  7.74 to 8.65 LD Nov. 5 - 17 NHATS target
6.42 LD Nov. 13 2018 VU7 13 m  6.77 to 7.71 LD Nov. 10 - 17
7.64 LD Nov. 20 2018 VP7 15 m  9.39 from 10.19 LD today - Nov. 25 NHATS target, enters ten LD
8.00 LD Nov. 13 2018 VR6 11 m  8.55 to 9.51 LD Nov. 10 - 16
8.20 LD Nov. 25 2018 VT7 9 m  9.70 from 10.02 LD today - Dec. 7 NHATS target, enters ten LD
9.04 LD yesterday 2018 VD7 25 m  9.15 to 9.84 LD Nov. 12 - 16
9.40 LD Nov. 13 2018 UQ1 139 m  9.84 to 10.98 LD Nov. 12 - 15 exits ten LD
9.66 LD Nov. 13 2018 VF5 10 m  9.87 to 10.29 LD Nov. 11 - 15 exits ten LD
9.73 LD yesterday 2018 VW4 43 m  9.95 to 10.89 LD Nov. 13 - 15 exits ten LD

This report was generated at 1940 UTC with the discovery of approaching 2018 VO9 (MPEC) and with follow-up in today's DOU MPEC for inbound 2018 VS8 and seven departed objects: 2018 VU5, 2018 VL3, 2018 TZ5, and including risk-listed objects: 2018 VA8, 2018 VS6, 2018 VP6, and 2018 VC.

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  24.0 from 26.0 LD Nov. 23 - 30 EPU +/- 2.04 days*
2.6   LD Dec. 15* 2018 VO9 15 m  17.7 from 18.3 LD Nov. 29 - Dec. 31 NEW, EPU +/- 1.28 hours*, risk - MPEC
4.1   LD Dec. 9* 2013 VX4 62 m  34.4 from 35.8 LD Dec. 3 - 15 EPU +/- 2.35 days*
7.36 LD Dec. 22 163899 2003 SD220 1.17 km  47.47 from 48.59 LD Dec. 17 - 26 NHATS target
7.3   LD Jan. 9* 2013 YM2 19 m  51.2 from 52.0 LD Jan. 2 - 16 EPU +/- 1.25 days*, NHATS target
* EPU = Earth passage uncertainty


<< Reading:  A large and, geologically speaking, relatively young impact crater has been discovered under the Greenland ice sheet, as detailed in a new science paper. See also an article at Astronomy magazine. There are indications that this impact could be the long-sought cause of the Younger Dryas climate episode some 13,000 years ago or less. And, on a distantly related note, BBC Travel has an interesting report on visiting what's left above water of the much larger and far older Chicxulub crater in Mexico's Yucatan Peninsula.



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 15 November '18

The MPC's NEO Confirmation Page has 47 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 47 objects listed. Of these, 35 were "one nighters." So far The Tracking News has counted a total of 65 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 15 November '18

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-V203 - "15:22 UT" - 2018 VR9


MPEC 2018-V202 - "15:16 UT" - 2018 VS9


MPEC 2018-V201 - "15:11 UT" - 2018 VQ9


MPEC 2018-V200 - "15:06 UT" - 2018 VP9


MPEC 2018-V199 - "15:00 UT" - 2018 VO9


<< DOU on 15 Nov. '18 >>  MPEC 2018-V198 - "13:07 UT" - Daily Orbit Update

Observers  on 15 November '18

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

CodeObserver / observatory
T05ATLAS Haleakala in Hawaii, 2 in MPEC 2018-V198 -- 2018 TT1, 2011 AA37
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2018-V198 -- 2018 TQ2
160Castelmartini Obs. in Italy, 3 in MPEC 2018-V198 -- 2018 NB, 2018 GA5, 65706
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2018-V198 & 2018-V203 -- 2018 VS8, 2018 VR9
X31Galilei Obs., 1 in MPEC 2018-V203 -- 2018 VR9
A17Guidestar Obs. in Germany, 1 in MPEC 2018-V203 -- 2018 VR9
246KLENOT in the Czech Republic, 1 in MPEC 2018-V203 -- 2018 VR9
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2018-V201, 2018-V202 & 2018-V203 -- 2018 VS9, 2018 VR9, 2018 VQ9
C94MASTER-II Tunka in Russia, 1 in MPEC 2018-V198 -- 381564
568^R. Wainscoat on Mauna Kea in Hawaii, 2 in MPECs 2018-V199 & 2018-V200 -- 2018 VP9, 2018 VO9
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2018-V198 -- 2015 XQ55
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2018-V198 & 2018-V203 -- 2018 VU8, 2018 VR9
I41Palomar Transient Factory in southern California, 1 in MPEC 2018-V198 -- 409204
F52Pan-STARRS 2 (PS2) in Hawaii, 3 in MPECs 2018-V199, 2018-V200 & 2018-V202 -- 2018 VS9, 2018 VP9, 2018 VO9
A53Peschiera del Garda Obs. in Italy, 2 in MPEC 2018-V198 -- 2018 RL, 2018 QN1
A48Povegliano Veronese Obs. in Italy, 1 in MPEC 2018-V198 -- 2018 UR2
L04ROASTERR-1 in Romania, 2 in MPEC 2018-V198 -- 2018 VX, 2018 VN3
K61Rokycany Obs. in the Czech Republic, 1 in MPEC 2018-V203 -- 2018 VR9
247roving observer, 1 in MPEC 2018-V198 -- 2018 VT8
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-V203 -- 2018 VR9
C95SATINO-1 in France, 1 in MPEC 2018-V198 -- 283729
204Schiaparelli Obs. in Italy, 1 in MPEC 2018-V203 -- 2018 VR9
033Schwarzschild Obs. in Germany, 2 in MPECs 2018-V202 & 2018-V203 -- 2018 VS9, 2018 VR9
W88!program code "!" (10) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2018-V198 -- 33342
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2018-V198 -- 2018 VN5, 2018 RJ7, 518735
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2018-V198 & 2018-V200 -- 2018 VS6, 2018 VP9, 2018 VP6, 2018 VL8, 2018 TZ5, 2018 TJ6
I52Steward Obs. Mt. Lemmon Station in Arizona, 41 in MPECs 2018-V198, 2018-V200, 2018-V202 & 2018-V203 -- 2018 VZ3, 2018 VZ1, 2018 VY6, 2018 VX6, 2018 VX4, 2018 VX, 2018 VW5, 2018 VV1, 2018 VU5, 2018 VT6, 2018 VS9, 2018 VS6, 2018 VS5, 2018 VR9, 2018 VQ6, 2018 VQ3, 2018 VP9, 2018 VP6, 2018 VO6, 2018 VM3, 2018 VL3, 2018 VK3, 2018 VH2, 2018 VH1, 2018 VG6, 2018 VG5, 2018 VG3, 2018 VF4, 2018 VF3, 2018 VE5, 2018 VE4, 2018 VC5, 2018 VC, 2018 VB7, 2018 VB5, 2018 VB1, 2018 VA8, 2018 UJ1, 2018 UG3, 2018 TS5, 2018 TN6
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 6 in MPEC 2018-V198 -- 2018 VS6, 2018 VP6, 2018 VO6, 2018 VC, 2018 VA8, 2018 UM1
L01Visnjan Obs., 3 in MPECs 2018-V201, 2018-V202 & 2018-V203 -- 2018 VS9, 2018 VR9, 2018 VQ9
718Wiggins Obs. in Utah, 2 in MPEC 2018-V198 -- 2018 TT1, 2018 RL
C51WISE in Earth polar orbit, 1 in MPEC 2018-V201 -- 2018 VQ9
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 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 VO9JPL Sentry16352098-2110330.00017551243-5.07-5.800JPL: Computed at 08:05 today Pacific time based on 14 observations spanning 5.9361 days (2018-Nov-09.26967 to 2018-Nov-15.205807). Diameter approximately 0.015 km. from weighted mean H=26.72.
2018 VL8JPL Sentry16352033-203312.443e-06-3.83-3.830JPL: Computed at 07:23 today Pacific time based on 26 observations spanning 5.0617 days (2018-Nov-10.20912 to 2018-Nov-15.27077). Diameter approximately 0.095 km. from weighted mean H=22.76.
2018 VA8JPL Sentry16352099-2116302.64457234e-05-5.72-6.180JPL: Computed at 07:32 today Pacific time based on 30 observations spanning 2.9855 days (2018-Nov-12.28874 to 2018-Nov-15.27422). Diameter approximately 0.014 km. from weighted mean H=26.89.
2018 VS6JPL Sentry16352083-2118180.000170975049-4.79-4.910JPL: Computed at 07:38 today Pacific time based on 73 observations spanning 5.9305 days (2018-Nov-09.544497 to 2018-Nov-15.475). Diameter approximately 0.014 km. from weighted mean H=26.86.
2018 VP6JPL Sentry16352088-208822.462e-06-6.75-6.990JPL: Computed at 07:20 today Pacific time based on 27 observations spanning 5.1062 days (2018-Nov-10.2782 to 2018-Nov-15.38443). Diameter approximately 0.013 km. from weighted mean H=27.09.
2018 VO6JPL Sentry16352048-205946.770203e-05-3.58-3.600JPL: Computed at 07:26 today Pacific time based on 43 observations spanning 9.8688 days (2018-Nov-05.410654 to 2018-Nov-15.2795). Diameter approximately 0.047 km. from weighted mean H=24.29.
2018 VCJPL Sentry16352109-211886.7279e-06-6.28-6.590JPL: Computed at 07:17 today Pacific time based on 123 observations spanning 13.982 days (2018-Nov-01.24873 to 2018-Nov-15.23065). Diameter approximately 0.018 km. from weighted mean H=26.32.
2018 TJ6JPL Sentry1635R E M O V E DJPL: Risk listing removed at 1505 UTC today

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 15 November '18

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

1940Generated Traffic Report
1635Noted that JPL Sentry has removed 2018 TJ6 as an impact risk - 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 updated its 2018 VL8 risk assessment - see above
Noted that JPL Sentry has updated its 2018 VO6 risk assessment - see above
Noted that JPL Sentry has posted 2018 VO9 as an impact risk - 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
Grabbed MPEC 2018-V198 - Daily Orbit Update - see above
Grabbed MPEC 2018-V199 - 2018 VO9 - see above
Grabbed MPEC 2018-V200 - 2018 VP9 - see above
Grabbed MPEC 2018-V201 - 2018 VQ9 - see above
Grabbed MPEC 2018-V202 - 2018 VS9 - see above
Grabbed MPEC 2018-V203 - 2018 VR9 - see above