Contents  on 30 November '19

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 30 November '19

Six objects reported inside ten LD

There are six visitors reported within ten lunar distances (LD) of our planet today. Nearest is newly announced intruder 2019 WJ4, which comes in from 3.57 LD, passes us at 0.85 LD and moves out to 1.09 LD, while also passing the Moon at 0.19 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
0.85 LD today 2019 WJ4 7 m  0.85 LD Nov. 28 - Dec. 3 NEW, intruder today, Earth closest at 2004 UTC,
Moon closest 0.19 LD at 2244 UTC - MPEC
3.43 LD Dec. 1 2019 WH2 14 m  3.54 from 4.67 LD Nov. 27 - Dec. 5 DOU
4.3   LD Dec. 1* 2019 WN1 17 m  4.7 from 6.0 LD Nov. 27 - Dec. 5 EPU +/- 3.15 hours*
5.82 LD Dec. 2 2019 WH4 13 m  6.24 from 7.11 LD Nov. 27 - Dec. 6 NEW, risk - MPEC
8.5   LD Dec. 3* 2017 AP4 14 m  9.8 from 10.7 LD today - Dec. 7 EPU +/- 2.97 days*, enters ten LD
9.66 LD today 2019 WQ3 110 m  9.66 LD yesterday - today Earth closest at 0306 UTC - DOU
Approaching - sorted by 10-LD bubble entry date
4.8   LD Dec. 9* 2019 WO2 31 m  15.7 from 17.4 LD Dec. 4 - 14 EPU +/- 4.60 hours*
9.8   LD Dec. 9* 2019 WT3 40 m  23.5 from 25.9 LD Dec. 8 - 10 EPU +/- 37 mins.*
* EPU = Earth passage uncertainty

This report was generated at 1910 UTC with the discoveries of passing intruder 2019 WJ4 (MPEC) and risk-listed 2019 WH4 (MPEC), and with follow-up in today's DOU MPEC for inbound 2019 WH2, passing 2019 WQ3, and four departed objects: 2019 WZ2, 2019 VJ5, and including risk-listed objects 2019 WU and 2019 WE.



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 30 November '19

The MPC's NEO Confirmation Page has 82 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 82 objects listed. Of these, 45 were "one nighters." The Tracking News counted a total of 103 listings on the NEOCP on this day.

New MPECs  on 30 November '19

Minor Planet Electronic Circulars

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


MPEC 2019-W195 - "23:59 UT" - 2019 WU4


MPEC 2019-W194 - "23:58 UT" - 2019 WT4


MPEC 2019-W193 - "23:56 UT" - 2019 WS4


MPEC 2019-W192 - "23:54 UT" - 2019 WR4


MPEC 2019-W191 - "23:54 UT" - 2019 WQ4


MPEC 2019-W190 - "23:51 UT" - 2019 WP4


MPEC 2019-W189 - "23:50 UT" - 2019 WO4


MPEC 2019-W188 - "21:32 UT" - 2019 QQ8


<< DOU on 30 November '19 >>  MPEC 2019-W187 - "12:01 UT" - Daily Orbit Update


MPEC 2019-W186 - "04:47 UT" - Comet C/2019 E3 (Atlas)


MPEC 2019-W185 - "03:58 UT" - 2019 WM4


MPEC 2019-W184 - "02:42 UT" - 2019 WL4


MPEC 2019-W183 - "02:41 UT" - 2019 WK4


MPEC 2019-W182 - "02:40 UT" - 2019 WJ4


MPEC 2019-W181 - "02:33 UT" - 2019 WH4


MPEC 2019-W180 - "02:29 UT" - 2019 WG4


MPEC 2019-W179 - "02:05 UT" - Comet 289P/Blanpain


MPEC 2019-W178 - "00:59 UT" - 2019 WC4

Observers  on 30 November '19

A total of 45 observers appeared in this day's MPECs.

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2019-W187 -- 66146
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2019-W178 & 2019-W187 -- 2019 WF2, 2019 WC4
T05ATLAS Haleakala in Hawaii, 16 in MPECs 2019-W187 & 2019-W194 -- 2019 WT4, 2019 WR3, 2015 WH13, 2011 YS62, 89830, 85236, 323179, 311044, 238063, 18172, 163696, 162723, 137084, 11885, 6455, 1866
T08ATLAS Mauna Loa in Hawaii, 41 in MPECs 2019-W187, 2019-W190 & 2019-W194 -- 2019 WT4, 2019 WP4, 2016 UT80, 2015 WH13, 2000 WO148, 87311, 85839, 68950, 492143, 467317, 458745, 415711, 354030, 35107, 275975, 25330, 252399, 18882, 186844, 171486, 164211, 163081, 154278, 153842, 143947, 138852, 138013, 11405, 106589, 106538, 9400, 7092, 7088, 6047, 5626, 5189, 4487, 4183, 3102, 2102, 2059
I47Auger Obs. in Argentina, 1 in MPEC 2019-W179 -- 289P
C77Bernezzo Obs. in Italy, 1 in MPEC 2019-W194 -- 2019 WT4
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2019-W187 -- 2019 WD3
160Castelmartini Obs. in Italy, 3 in MPECs 2019-W187 & 2019-W194 -- 2019 WT4, 514041, 9400
K51Celado Obs. in Italy, 1 in MPEC 2019-W178 -- 2019 WC4
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 11 in MPECs 2019-W180, 2019-W185, 2019-W187, 2019-W191 & 2019-W192 -- 2019 WZ2, 2019 WX1, 2019 WR4, 2019 WQ4, 2019 WM4, 2019 WH1, 2019 WG4, 2019 VJ5, 2019 VD6, 2019 VD1, 2019 UX13
A77Chante-Perdrix Obs. in France, 1 in MPEC 2019-W187 -- 99248
Z99Clixby Obs. in England, 4 in MPECs 2019-W182, 2019-W187, 2019-W190 & 2019-W194 -- 2019 WT4, 2019 WP4, 2019 WJ4, 2019 OP2
W84%program code "%" (14) via DECam in Chile, 1 in MPEC 2019-W187 -- 2018 FY2
K87Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2019-W194 -- 2019 WT4
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPECs 2019-W178 & 2019-W184 -- 2019 WL4, 2019 WC4
595Farra d'Isonzo Obs. in Italy, 4 in MPECs 2019-W187, 2019-W190 & 2019-W194 -- 2019 WW, 2019 WT4, 2019 WQ3, 2019 WP4
372Geisei Obs. in Japan, 1 in MPEC 2019-W179 -- 289P
K88GINOP-KHK in Hungary, 2 in MPECs 2019-W190 & 2019-W194 -- 2019 WT4, 2019 WP4
J95Great Shefford Obs. in England, 4 in MPECs 2019-W181, 2019-W182, 2019-W190 & 2019-W194 -- 2019 WT4, 2019 WP4, 2019 WJ4, 2019 WH4
A17Guidestar Obs. in Germany, 2 in MPECs 2019-W190 & 2019-W194 -- 2019 WT4, 2019 WP4
Q62iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2019-W179 -- 289P
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2019-W179 & 2019-W186 -- C/2019 E3, 289P
D95Kurihara Obs. in Japan, 1 in MPEC 2019-W179 -- 289P
K91LCO Sutherland A in South Africa, 1 in MPEC 2019-W187 -- 2019 WH2
568^R. Wainscoat on Mauna Kea in Hawaii, 6 in MPECs 2019-W180, 2019-W184, 2019-W189, 2019-W191, 2019-W192 & 2019-W195 -- 2019 WU4, 2019 WR4, 2019 WQ4, 2019 WO4, 2019 WL4, 2019 WG4
711McDonald Obs. in Texas, 1 in MPEC 2019-W195 -- 2019 WU4
474Mt. John Obs. in New Zealand, 1 in MPEC 2019-W186 -- C/2019 E3
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2019-W178 & 2019-W193 -- 2019 WS4, 2019 WC4
C47Nonndorf Obs. in Austria, 2 in MPECs 2019-W190 & 2019-W194 -- 2019 WT4, 2019 WP4
J69North Obs. in England, 4 in MPECs 2019-W187 & 2019-W194 -- 2019 WT4, 2019 WR3, 2019 WQ3, 2019 WL3
Z80Northolt Branch Obs. in England, 1 in MPEC 2019-W194 -- 2019 WT4
F51Pan-STARRS 1 (PS1) in Hawaii, 35 in MPECs 2019-W180, 2019-W181, 2019-W182, 2019-W184, 2019-W185, 2019-W186, 2019-W187, 2019-W188, 2019-W189, 2019-W190, 2019-W191, 2019-W192 & 2019-W195 -- 2019 WU4, 2019 WR4, 2019 WQ4, 2019 WP4, 2019 WO4, 2019 WM4, 2019 WL4, 2019 WJ4, 2019 WH4, 2019 WG4, 2019 WF1, 2019 UV3, 2019 UR11, 2019 UO, 2019 QQ8, 2019 OA5, 2019 NY2, C/2019 E3, 2015 XU168, 2014 HH192, 2012 VZ4, 2009 DR36, 88959, 523945, 481542, 479345, 471956, 397471, 355256, 31221, 307161, 285567, 241370, 138013, 3552
F52Pan-STARRS 2 (PS2) in Hawaii, 30 in MPECs 2019-W181, 2019-W182, 2019-W183, 2019-W187, 2019-W190, 2019-W192 & 2019-W193 -- 2019 WS4, 2019 WR4, 2019 WP4, 2019 WK4, 2019 WJ4, 2019 WH4, 2019 UW5, 2019 UJ2, 2019 TL4, 2019 SZ2, 2019 RD, 2019 QT8, 2019 PA, 2019 LW1, 2019 LK5, 2015 XL128, 2014 PF68, 2012 VF80, 2008 SJ82, 1998 WL4, 448724, 419464, 416231, 225416, 162825, 152828, 144898, 141052, 141018, 3988
K63Pascoli Obs. in Italy, 6 in MPECs 2019-W182, 2019-W183, 2019-W184, 2019-W190, 2019-W194 & 2019-W195 -- 2019 WU4, 2019 WT4, 2019 WP4, 2019 WL4, 2019 WK4, 2019 WJ4
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 2 in MPECs 2019-W187 & 2019-W194 -- 2019 WT4, 2019 WM3
867Saji Obs. in Japan, 1 in MPEC 2019-W179 -- 289P
C95SATINO-1 in France, 1 in MPEC 2019-W187 -- 2019 UO
204Schiaparelli Obs. in Italy, 3 in MPECs 2019-W178, 2019-W183 & 2019-W194 -- 2019 WT4, 2019 WK4, 2019 WC4
033Schwarzschild Obs. in Germany, 4 in MPECs 2019-W183, 2019-W187, 2019-W193 & 2019-W194 -- 2019 WT4, 2019 WS4, 2019 WM2, 2019 WK4
G40-program code "-" (22) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-W187 -- 2019 WR2
587Sormano Obs. in Italy, 1 in MPEC 2019-W194 -- 2019 WT4
I52Steward Obs. Mt. Lemmon Station in Arizona, 2 in MPECs 2019-W178 & 2019-W187 -- 2019 WE, 2019 WC4
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2019-W187 -- 2019 WU, 2019 WA3
L01Visnjan Obs., 10 in MPECs 2019-W178, 2019-W187, 2019-W189, 2019-W190, 2019-W191, 2019-W192, 2019-W193, 2019-W194 & 2019-W195 -- 2019 WZ3, 2019 WU4, 2019 WT4, 2019 WS4, 2019 WR4, 2019 WQ4, 2019 WP4, 2019 WO4, 2019 WK4, 2019 WC4
C51WISE in Earth polar orbit, 4 in MPEC 2019-W187 -- 2019 QD6, 2014 XX7, 35107, 7088
C42Xingming Obs. in China, 1 in MPEC 2019-W190 -- 2019 WP4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 November '19

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
2019 WH4NEODyS1530211315.91e-08-8.64-8.640NEODyS: "Based on 10 optical observations (of which 1 are rejected as outliers) from 2019-11-25.251 to 2019-11-29.862."
2019 WA3JPL Sentry15302090-2116111.947059e-06-6.31-6.970JPL: Computed at 07:03 today Pacific time based on 10 observations spanning 2.9650 days (2019-Nov-25.361902 to 2019-Nov-28.326869). Diameter approximately 0.027 km. from weighted mean H=25.47.
NEODyS15302090-2116162.4e-06-6.23-6.890NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2019-11-25.363 to 2019-11-28.328."
2019 WF1JPL Sentry15302090-209012.608e-08-5.00-5.000JPL: Computed at 06:56 today Pacific time based on 29 observations spanning 13.032 days (2019-Nov-17.208872 to 2019-Nov-30.24095). Diameter approximately 0.370 km. from weighted mean H=19.79.
2019 WUJPL Sentry15302058-2112102.72416e-06-6.85-7.340JPL: Computed at 06:59 today Pacific time based on 26 observations spanning 9.2767 days (2019-Nov-19.34099 to 2019-Nov-28.617697). Diameter approximately 0.012 km. from weighted mean H=27.25.
NEODyS15302058-2113139.85e-07-7.39-7.740NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2019-11-19.342 to 2019-11-28.618."
2019 WEJPL Sentry15302044-207887.027727e-05-4.93-5.050JPL: Computed at 07:01 today Pacific time based on 50 observations spanning 4.3006 days (2019-Nov-17.25242 to 2019-Nov-21.552994). Diameter approximately 0.015 km. from weighted mean H=26.77.
NEODyS15302044-2081129.89e-06-5.88-6.130NEODyS: "Based on 50 optical observations (of which 0 are rejected as outliers) from 2019-11-17.253 to 2019-11-21.554."
2018 FY2JPL Sentry15302046-210241.783945e-07-6.94-7.220JPL: Computed at 06:58 today Pacific time based on 14 observations spanning 6.1325 days (2018-Mar-15.14016 to 2018-Mar-21.27264). Diameter approximately 0.024 km. from weighted mean H=25.71.
NEODyS15302046-210221.1e-07-6.99-7.090NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2018-03-15.141 to 2018-03-21.273."

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 30 November '19

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

0009 12/1Grabbed MPEC 2019-W195 - 2019 WU4 - see above
2358Grabbed MPEC 2019-W189 - 2019 WO4 - see above
Grabbed MPEC 2019-W190 - 2019 WP4 - see above
Grabbed MPEC 2019-W191 - 2019 WQ4 - see above
Grabbed MPEC 2019-W192 - 2019 WR4 - see above
Grabbed MPEC 2019-W193 - 2019 WS4 - see above
Grabbed MPEC 2019-W194 - 2019 WT4 - see above
2232Grabbed MPEC 2019-W188 - 2019 QQ8 - see above
1910Generated Traffic Report
1530Noted that JPL Sentry has updated its 2018 FY2 risk assessment - see above
Noted that NEODyS has updated its 2018 FY2 risk assessment - see above
Noted that JPL Sentry has updated its 2019 WA3 risk assessment - see above
Noted that NEODyS has updated its 2019 WA3 risk assessment - see above
Noted that JPL Sentry has updated its 2019 WE risk assessment - see above
Noted that NEODyS has updated its 2019 WE risk assessment - see above
Noted that JPL Sentry has updated its 2019 WF1 risk assessment - see above
Noted that NEODyS has posted 2019 WH4 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 WU risk assessment - see above
Noted that NEODyS has updated its 2019 WU risk assessment - see above
Grabbed MPEC 2019-W187 - Daily Orbit Update - see above
0515Grabbed MPEC 2019-W186 - Comet C/2019 E3 (Atlas) - see above
0404Grabbed MPEC 2019-W178 - 2019 WC4 - see above
Grabbed MPEC 2019-W179 - Comet 289P/Blanpain - see above
Grabbed MPEC 2019-W180 - 2019 WG4 - see above
Grabbed MPEC 2019-W181 - 2019 WH4 - see above
Grabbed MPEC 2019-W182 - 2019 WJ4 - see above
Grabbed MPEC 2019-W183 - 2019 WK4 - see above
Grabbed MPEC 2019-W184 - 2019 WL4 - see above
Grabbed MPEC 2019-W185 - 2019 WM4 - see above