Contents  on 6 October '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 6 October '19

Fourteen objects reported inside ten LD

There are fourteen small Solar-System bodies reported within ten lunar distances (LD) of our planet today. Closest is risk-listed 2019 TX, which exits Earth's SOI as it slips away from 2.06 to 3.48 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
0.97 LD Oct. 3 2019 SP3 19 m  5.34 to 7.24 LD Sept. 28 - Oct. 8 intruder, risk
1.17 LD Sept. 29 2019 TA 4 m  9.39 to 10.78 LD Sept. 22 - today NHATS target, exits ten LD
1.22 LD Oct. 3 2019 TK 8 m  7.52 to 10.62 LD Sept. 30 - today exits ten LD
1.25 LD Oct. 4 2019 TX 6 m  2.06 to 3.48 LD Sept. 28 - Oct. 11 NHATS target, exits Earth SOI, risk
1.39 LD Oct. 2 2019 SD8 11 m  9.61 to 12.03 LD Sept. 28 - today exits ten LD
1.5   LD Oct. 8* 2019 TW1 9 m  3.7 from 6.2 LD Oct. 4 - 12 NEW, EPU +/- 9 mins.* - MPEC
2.20 LD Sept. 30 2019 SN3 16 m  9.71 to 11.38 LD Sept. 24 - today exits ten LD
2.36 LD Sept. 24 2019 SU3 13 m  7.26 to 7.83 LD Sept. 6 - Oct. 10 NHATS target, risk - DOU
3.5   LD Oct. 8* 2019 TC1 12 m  5.6 from 8.1 LD yesterday - Oct. 11 EPU +/- 50 mins.*
4.11 LD yesterday 2019 TV 8 m  4.36 to 5.40 LD Sept. 30 - Oct. 9
4.38 LD Oct. 8 2019 TU 21 m  5.19 from 6.64 LD Oct. 4 - 12 risk - DOU
4.50 LD Oct. 2 2019 TW 10 m  5.27 to 5.74 LD Sept. 21 - Oct. 13 NHATS target
7.75 LD Oct. 8 2019 SB6 15 m  8.19 from 8.91 LD Oct. 4 - 12 NHATS target
8.40 LD Oct. 8 2019 TS 27 m  8.86 from 9.56 LD yesterday - Oct. 11

This report was generated at 2040 UTC with the of discovery of inbound 2019 TW1 (MPEC). Today's DOU MPEC has the recovery of distant 2019 HM and follow-up for four objects in our active traffic tables, for eleven departed objects: 2019 SU6, 2019 SW5, 2019 SF4, 2019 SF1, 2019 RP2, and including six risk-listed -- 2019 TF1, 2019 SK9, 2019 SO6, 2019 SD, 2019 RT3, and 2019 QU3, and for distant 163899 2003 SD220, plus astrometry from early September for 2019 RP1 and risk-listed 2019 RP1.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
1.41 LD Oct. 9 2019 SL7 21 m  10.07 from 13.88 LD tomorrow - Oct. 12 risk - DOU
8.02 LD Oct. 9 2019 TZ 17 m  10.23 from 12.03 LD tomorrow - Oct. 11 DOU
9.39 LD Oct. 8 2019 TM 36 m  10.35 from 11.87 LD tomorrow - Oct. 9
2.9   LD Oct. 13* 2019 TT1 22 m  20.5 from 23.5 LD Oct. 10 - 16 EPU +/- 2.02 hours*
8.6   LD Oct. 12* 2019 SV9 28 m  20.0 from 22.8 LD Oct. 11 - 14 EPU +/- 8 mins.*
*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 objects under observation that have come within ten LD since A/CC began this traffic reporting (2007) but are not currently so close. Object temporal distances are derived by A/CC from JPL Horizons data. "LD*" indicates some uncertainty in object passage time and distance. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 6 October '19

The MPC's NEO Confirmation Page has 84 listings

When last checked at 2207 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 84 objects listed. Of these, 39 were "one nighters." So far The Tracking News has counted a total of 92 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 6 October '19

Minor Planet Electronic Circulars

As of last check at 2207 UTC, there have been twelve MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2019-T106 - "21:26 UT" - 2019 SH1


MPEC 2019-T105 - "21:26 UT" - 2019 NJ7


MPEC 2019-T104 - "21:25 UT" - 2019 LK5


MPEC 2019-T103 - "21:24 UT" - 2019 JJ1


MPEC 2019-T102 - "21:23 UT" - 2019 HC


MPEC 2019-T101 - "21:21 UT" - 2019 GU2


MPEC 2019-T100 - "21:17 UT" - 2016 AL8


MPEC 2019-T99 - "20:45 UT" - Comet C/2018 DO4 (Lemmon)


<< DOU on 6 October '19 >>  MPEC 2019-T98 - "12:21 UT" - Daily Orbit Update


MPEC 2019-T97 - "02:17 UT" - 2019 TW1


MPEC 2019-T96 - "02:15 UT" - 2019 TV1


MPEC 2019-T95 - "02:14 UT" - 2019 SD11

Observers  on 6 October '19

A total of 70 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 4 in MPECs 2019-T95, 2019-T98 & 2019-T99 -- 2019 SW, 2019 SD11, 2019 RX1, C/2018 DO4
T05ATLAS Haleakala in Hawaii, 12 in MPECs 2019-T98, 2019-T99 & 2019-T104 -- 2019 OV2, 2019 LW1, 2019 LK5, C/2018 DO4, 2013 CK89, 2009 SP, 467475, 318411, 228502, 153842, 6047, 5131
T08ATLAS Mauna Loa in Hawaii, 22 in MPECs 2019-T98 & 2019-T99 -- C/2018 DO4, 2012 PW, 2010 VW75, 2010 UH7, 2009 QB36, 2001 QC34, 96536, 87311, 530743, 503960, 492143, 481394, 442243, 254417, 153814, 142555, 141593, 137052, 5626, 5189, 4183, 3102
X74Campo dos Amarais Obs., 3 in MPEC 2019-T98 -- 481542, 136993, 9400
160Castelmartini Obs. in Italy, 3 in MPEC 2019-T98 -- 2009 QB36, 2001 QC34, 492143
703Catalina Sky Survey (CSS) in Arizona, 74 in MPECs 2019-T98, 2019-T99, 2019-T104 & 2019-T106 -- 2019 SZ, 2019 SV4, 2019 SL7, 2019 SK7, 2019 SH4, 2019 SH1, 2019 SF8, 2019 SE2, 2019 RU, 2019 RK, 2019 QC1, 2019 PA, 2019 OV2, 2019 NJ5, 2019 LK5, 2019 GT3, C/2018 DO4, 2017 MN8, 2016 PX66, 2015 PC228, 2013 CK89, 2012 PW, 2011 SG16, 2010 VW75, 2010 UH7, 2009 SP, 2009 QB36, 2008 YR27, 2008 SR1, 2007 TQ24, 2006 SK134, 2004 FF29, 2001 QC34, 96536, 85713, 85709, 530743, 524603, 503960, 494880, 481985, 467475, 459200, 458745, 442243, 424089, 411201, 410778, 378610, 373428, 369264, 339714, 334412, 318411, 25330, 252793, 228502, 226514, 218863, 163760, 154278, 152685, 143527, 141593, 140333, 137052, 108906, 6047, 5626, 5189, 4183, 3102, 2059, 1627
V06Catalina Sky Survey Kuiper Telescope in Arizona, 1 in MPEC 2019-T98 -- 2019 RW
309'Martin Altmann in Germany via Cerro Paranal in Chile, 2 in MPEC 2019-T98 -- 2019 SR3, 2019 OU3
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 12 in MPECs 2019-T95 & 2019-T98 -- 2019 TU, 2019 TT, 2019 TO, 2019 TK1, 2019 SL, 2019 SJ1, 2019 SH4, 2019 SD3, 2019 SD11, 2019 SC11, 2019 RK, 2019 NV
G58Chabot Obs. in northern California, 3 in MPEC 2019-T98 -- 2010 UH7, 2006 RJ1, 140333
A77Chante-Perdrix Obs. in France, 1 in MPEC 2019-T99 -- C/2018 DO4
C13Como Obs. in Italy, 1 in MPEC 2019-T98 -- 2010 UH7
N55Corona Borealis Obs. in Tibet, 1 in MPEC 2019-T99 -- C/2018 DO4
0952Vasiliy Rumyantsev via Crimean Astrophysical Obs. in Ukraine, 1 in MPEC 2019-T99 -- C/2018 DO4
106Crni Vrh Obs. in Slovenia, 3 in MPEC 2019-T98 -- 2019 GT3, 492143, 326742
W84!program code "!" (10) via DECam in Chile, 2 in MPEC 2019-T98 -- 2010 VL1, 8201
K87Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2019-T99 -- C/2018 DO4
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2019-T98 -- 401857
006Fabra Obs. in Spain, 1 in MPEC 2019-T98 -- 1620
K83Forti Obs., 6 in MPEC 2019-T98 -- 2019 PR2, 2019 JF1, 2015 RZ35, 326777, 237805, 162082
157Frasso Sabino Obs. in Italy, 1 in MPEC 2019-T99 -- C/2018 DO4
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2019-T99 -- C/2018 DO4
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2019-T99 -- C/2018 DO4
I896program code 6 via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2019-T99 -- C/2018 DO4
Q62iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2019-T98 -- 2019 MW3
Q628N. Falla in England via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2019-T98 -- 306367
Z32Javalambre Obs., 1 in MPEC 2019-T98 -- 516155
U68JPL SynTrack Robotic Telescope, 4 in MPEC 2019-T98 -- 2019 QT3, 2015 QT9, 441825, 380160
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 8 in MPEC 2019-T98 -- 2019 TF1, 2019 SQ8, 2019 SO6, 2019 SK9, 2019 SD10, 2019 SD, 2019 QR6, 2019 PR2
Q63LCO Siding Spring A in New South Wales, 1 in MPEC 2019-T98 -- 2019 TU
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2019-T99 -- C/2018 DO4
C10Maisoncelles Obs. in France, 1 in MPEC 2019-T99 -- C/2018 DO4
W92MASTER OAFA Obs., 1 in MPEC 2019-T98 -- 9400
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2019-T98 -- 9400
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2019-T99 -- C/2018 DO4
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2019-T99 -- C/2018 DO4
118Modra Obs. in Slovakia, 1 in MPEC 2019-T99 -- C/2018 DO4
108Montelupo Obs. in Italy, 5 in MPEC 2019-T98 -- 339714, 141593, 6455, 2059, 1620
474Mt. John Obs. in New Zealand, 2 in MPECs 2019-T96 & 2019-T97 -- 2019 TW1, 2019 TV1
G96Mt. Lemmon Survey (MLS) in Arizona, 57 in MPECs 2019-T96, 2019-T97, 2019-T98 & 2019-T99 -- 2019 TW1, 2019 TV1, 2019 SY4, 2019 SX2, 2019 SV1, 2019 ST4, 2019 SH4, 2019 SH1, 2019 SF4, 2019 SC5, 2019 RU, 2019 RB4, 2019 NJ6, 2019 NJ1, 2019 MV3, 2019 MK2, 2019 KF3, 2019 JC47, C/2018 DO4, 2016 SG1, 2014 XX7, 2013 CK89, 2012 PZ19, 2011 SG16, 2011 HP, 2008 YR27, 2007 ML13, 2006 OS9, 2000 WO148, 1998 FJ74, 85839, 523605, 492143, 468741, 429733, 424089, 409342, 409266, 354332, 339714, 310402, 309203, 292165, 247517, 230118, 226514, 20429, 192563, 159399, 154991, 154278, 143651, 142563, 106538, 5189, 4183, 3102
089Nikolaev Obs. in Ukraine, 5 in MPEC 2019-T98 -- 455432, 354030, 153842, 5786, 5626
0895N.V. Maigurova via Nikolaev Obs. in Ukraine, 5 in MPEC 2019-T98 -- 455432, 354030, 153842, 5786, 5626
Z80Northolt Branch Obs. in England, 2 in MPEC 2019-T98 -- 2014 PF68, 162082
J43Oukaimeden Obs. in Morocco, 2 in MPEC 2019-T98 -- 524603, 228502
F51Pan-STARRS 1 (PS1) in Hawaii, 35 in MPECs 2019-T95, 2019-T98, 2019-T99, 2019-T101, 2019-T102, 2019-T103, 2019-T104, 2019-T105 & 2019-T106 -- 2019 TN1, 2019 SH1, 2019 SD11, 2019 NJ7, 2019 LK5, 2019 JJ1, 2019 HC, 2019 GU2, C/2018 DO4, 2016 UT80, 2015 YR1, 2012 SN30, 2012 CK2, 2010 AG79, 2009 WD, 2006 GX2, 2005 UX5, 2000 WO148, 525477, 470951, 418135, 416217, 414429, 388468, 347634, 285567, 230118, 20429, 159399, 143651, 142563, 106589, 5620, 5189, 3102
F52Pan-STARRS 2 (PS2) in Hawaii, 8 in MPEC 2019-T98 -- 2019 QU3, 2015 GF27, 2009 DR36, 2007 RV19, 2006 TD1, 2006 SV189, 442243, 141018
A53Peschiera del Garda Obs. in Italy, 1 in MPEC 2019-T99 -- C/2018 DO4
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2019-T99 -- C/2018 DO4
586Pic du Midi Obs. in France, 2 in MPEC 2019-T98 -- 2019 SW5, 2019 SU6
122Pises Obs. in France, 4 in MPEC 2019-T98 -- 2019 MK2, 481985, 459200, 112221
658Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2019-T99 -- C/2018 DO4
654Pomona College Table Mtn. Obs. (PCTMO) in southern California, 6 in MPEC 2019-T98 -- 2019 SZ, 2019 SF3, 2019 GT3, 2017 MN8, 537342, 1620
A48Povegliano Veronese Obs. in Italy, 1 in MPEC 2019-T99 -- C/2018 DO4
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2019-T99 -- C/2018 DO4
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2019-T99 -- C/2018 DO4
C95SATINO-1 in France, 1 in MPEC 2019-T98 -- 2008 TC4
204Schiaparelli Obs. in Italy, 1 in MPEC 2019-T99 -- C/2018 DO4
Q11Shinshiro Obs., 1 in MPEC 2019-T99 -- C/2018 DO4
G40"G. Gasparovic in Croatia via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-T99 -- C/2018 DO4
G40-program code "-" (22) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-T99 -- C/2018 DO4
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-T98 -- 2019 PR2
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-T99 -- C/2018 DO4
Y00SONEAR in Brazil, 5 in MPEC 2019-T98 -- 66146, 214088, 1866, 1620, 433
L06Sormano2 Obs. in Italy, 1 in MPEC 2019-T99 -- C/2018 DO4
691Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2019-T98 -- 2019 SF1, 2009 SP, 524268, 29075
291Spacewatch 1.8m telescope in Arizona, 13 in MPEC 2019-T98 -- 2019 TN1, 2019 TC, 2019 SU3, 2019 SP1, 2019 SL7, 2019 SD, 2019 RT3, 2019 RS2, 2019 RP2, 2019 RD3, 2019 NC1, 2015 KH157, 216258
W34Squirrel Valley Obs. in North Carolina, 2 in MPEC 2019-T98 -- 2006 MA, 293054
I52Steward Obs. Mt. Lemmon Station in Arizona, 9 in MPECs 2019-T96, 2019-T97, 2019-T98 & 2019-T99 -- 2019 TZ, 2019 TW1, 2019 TV1, 2019 SH7, 2019 RU1, 2019 RP1, 2019 RO2, 2019 RC3, C/2018 DO4
A71Stixendorf Obs. in Austria, 1 in MPEC 2019-T99 -- C/2018 DO4
Q23Sukagawa Obs., 1 in MPEC 2019-T99 -- C/2018 DO4
461SZTE Asteroid Program in Hungary, 1 in MPEC 2019-T99 -- C/2018 DO4
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPECs 2019-T98 & 2019-T100 -- 2019 HM, 2016 AL8
L01Visnjan Obs., 2 in MPECs 2019-T96 & 2019-T97 -- 2019 TW1, 2019 TV1
C51WISE in Earth polar orbit, 5 in MPECs 2019-T98 & 2019-T99 -- C/2018 DO4, 2015 RH2, 380160, 306462, 4487
I15Wishing Star Obs. in Rhode Island, 1 in MPEC 2019-T99 -- C/2018 DO4
I41Zwicky Transient Facility (ZTF) in southern California, 6 in MPEC 2019-T98 -- 86067, 163899, 137805, 11066, 5693, 1864
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 October '19

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2207 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 TN1JPL Sentry1600R E M O V E DJPL: Risk listing removed at 1413 UTC today
NEODyS1600R E M O V E D-
2019 TF1JPL Sentry1600R E M O V E DJPL: Risk listing removed at 1403 UTC today
NEODyS16002042-206521.0e-10-11.17-11.320NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2019-10-03.205 to 2019-10-06.261."
2019 TUJPL Sentry16002088-2119148.8418886e-05-4.81-4.820JPL: Computed at 06:55 today Pacific time based on 37 observations spanning 2.9558 days (2019-Oct-03.26434 to 2019-Oct-06.22018). Diameter approximately 0.021 km. from weighted mean H=26.02.
NEODyS16002066-2118356.7e-05-4.95-4.960NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2019-10-03.265 to 2019-10-06.221."
2019 TCNEODyS1600209612.34e-09-9.49-9.490NEODyS: "Based on 17 optical observations (of which 1 are rejected as outliers) from 2019-10-01.293 to 2019-10-06.391."
2019 SD10JPL Sentry16002034-205869.19166e-08-6.31-6.690JPL: Computed at 06:56 today Pacific time based on 19 observations spanning 5.8619 days (2019-Sep-30.28036 to 2019-Oct-06.14224). Diameter approximately 0.039 km. from weighted mean H=24.67.
NEODyS16002034-204172.99e-08-6.81-7.240NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2019-09-30.281 to 2019-10-06.143."
2019 SK9JPL Sentry16002045-209921.9855e-08-8.78-8.880JPL: Computed at 06:51 today Pacific time based on 15 observations spanning 5.9152 days (2019-Sep-30.29928 to 2019-Oct-06.21443). Diameter approximately 0.012 km. from weighted mean H=27.22.
NEODyS16002045-209939.07e-08-7.98-8.210NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2019-09-30.300 to 2019-10-06.215."
2019 SQ8JPL Sentry16002094-211044.46004e-08-6.50-6.640JPL: Computed at 06:49 today Pacific time based on 23 observations spanning 6.8239 days (2019-Sep-29.42055 to 2019-Oct-06.24449). Diameter approximately 0.077 km. from weighted mean H=23.22.
NEODyS16002085-211071.46e-07-6.02-6.220NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2019-09-29.421 to 2019-10-06.245."
2019 SL7JPL Sentry16002097-210522.5339e-07-7.17-7.320JPL: Computed at 06:54 today Pacific time based on 32 observations spanning 9.6903 days (2019-Sep-26.43402 to 2019-Oct-06.12429). Diameter approximately 0.021 km. from weighted mean H=26.07.
NEODyS16002097-210521.43e-07-7.42-7.540NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2019-09-26.435 to 2019-10-06.125."
2019 SO6JPL Sentry1600R E M O V E DJPL: Risk listing removed at 1355 UTC today
NEODyS16002077-211238.86e-09-8.03-8.070NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2019-09-26.296 to 2019-10-06.316."
2019 SU3JPL Sentry16002084-2119490.00580961518-3.64-3.680JPL: Computed at 06:59 today Pacific time based on 103 observations spanning 12.921 days (2019-Sep-23.249638 to 2019-Oct-06.17059). Diameter approximately 0.013 km. from weighted mean H=27.14.
NEODyS16002084-21182115.54e-03-3.65-3.660NEODyS: "Based on 104 optical observations (of which 1 are rejected as outliers) from 2019-09-23.250 to 2019-10-06.171."
2019 SDJPL Sentry16002080-208017.164e-05-4.50-4.500JPL: Computed at 06:31 today Pacific time based on 125 observations spanning 18.931 days (2019-Sep-17.240317 to 2019-Oct-06.17132). Diameter approximately 0.028 km. from weighted mean H=25.41.
NEODyS1600208012.95e-05-4.89-4.890NEODyS: "Based on 125 optical observations (of which 1 are rejected as outliers) from 2019-09-17.241 to 2019-10-06.172."
2019 RT3JPL Sentry16002075-2117160.0001108509-4.23-4.310JPL: Computed at 06:33 today Pacific time based on 100 observations spanning 23.640 days (2019-Sep-11.603747 to 2019-Oct-05.24333). Diameter approximately 0.032 km. from weighted mean H=25.14.
NEODyS16002075-2117401.86e-04-4.01-4.080NEODyS: "Based on 100 optical observations (of which 0 are rejected as outliers) from 2019-09-11.605 to 2019-10-05.244."
2019 RX1NEODyS1600R E M O V E D-
2019 QU3NEODyS16002060-211493.8e-06-7.36-7.460NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2019-08-27.345 to 2019-09-08.565."

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 6 October '19

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

2207Grabbed MPEC 2019-T100 - 2016 AL8 - see above
Grabbed MPEC 2019-T101 - 2019 GU2 - see above
Grabbed MPEC 2019-T102 - 2019 HC - see above
Grabbed MPEC 2019-T103 - 2019 JJ1 - see above
Grabbed MPEC 2019-T104 - 2019 LK5 - see above
Grabbed MPEC 2019-T105 - 2019 NJ7 - see above
Grabbed MPEC 2019-T106 - 2019 SH1 - see above
2101Grabbed MPEC 2019-T99 - Comet C/2018 DO4 (Lemmon) - see above
2040Generated Traffic Report
1600Noted that NEODyS has updated its 2019 QU3 risk assessment - see above
Noted that JPL Sentry has updated its 2019 RT3 risk assessment - see above
Noted that NEODyS has updated its 2019 RT3 risk assessment - see above
Noted that NEODyS has removed 2019 RX1 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 SD risk assessment - see above
Noted that NEODyS has updated its 2019 SD risk assessment - see above
Noted that JPL Sentry has updated its 2019 SD10 risk assessment - see above
Noted that NEODyS has updated its 2019 SD10 risk assessment - see above
Noted that JPL Sentry has updated its 2019 SK9 risk assessment - see above
Noted that NEODyS has updated its 2019 SK9 risk assessment - see above
Noted that JPL Sentry has updated its 2019 SL7 risk assessment - see above
Noted that NEODyS has updated its 2019 SL7 risk assessment - see above
Noted that JPL Sentry has removed 2019 SO6 as an impact risk - see above
Noted that NEODyS has updated its 2019 SO6 risk assessment - see above
Noted that JPL Sentry has updated its 2019 SQ8 risk assessment - see above
Noted that NEODyS has updated its 2019 SQ8 risk assessment - see above
Noted that JPL Sentry has updated its 2019 SU3 risk assessment - see above
Noted that NEODyS has updated its 2019 SU3 risk assessment - see above
Noted that NEODyS has updated its 2019 TC risk assessment - see above
Noted that JPL Sentry has removed 2019 TF1 as an impact risk - see above
Noted that NEODyS has updated its 2019 TF1 risk assessment - see above
Noted that JPL Sentry has removed 2019 TN1 as an impact risk - see above
Noted that NEODyS has removed 2019 TN1 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 TU risk assessment - see above
Noted that NEODyS has updated its 2019 TU risk assessment - see above
Grabbed MPEC 2019-T98 - Daily Orbit Update - see above
0431Grabbed MPEC 2019-T95 - 2019 SD11 - see above
Grabbed MPEC 2019-T96 - 2019 TV1 - see above
Grabbed MPEC 2019-T97 - 2019 TW1 - see above