Contents  on 5 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 5 October '19

Sixteen objects reported inside ten LD

Sixteen minor planets are reported inside ten lunar distances (LD) of Earth today. The nearest of these is risk-listed 2019 TX, which remains in our planet's sphere of gravitational influence as it travels from 1.25 out to 2.06 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  3.47 to 5.34 LD Sept. 28 - Oct. 8 intruder, risk
1.17 LD Sept. 29 2019 TA 4 m  8.01 to 9.39 LD Sept. 22 - tomorrow NHATS target
1.22 LD Oct. 3 2019 TK 8 m  4.47 to 7.52 LD Sept. 30 - tomorrow DOU
1.25 LD yesterday 2019 TX 6 m  1.25 to 2.06 LD Sept. 28 - Oct. 11 NHATS target, inside Earth SOI, risk
1.39 LD Oct. 2 2019 SD8 11 m  7.20 to 9.61 LD Sept. 28 - tomorrow
2.20 LD Sept. 30 2019 SN3 16 m  8.05 to 9.71 LD Sept. 24 - tomorrow
2.36 LD Sept. 24 2019 SU3 13 m  6.70 to 7.26 LD Sept. 6 - Oct. 10 NHATS target, risk - DOU
3.5   LD Oct. 8* 2019 TC1 12 m  8.1 from 10.8 LD today - Oct. 11 EPU +/- 50 mins.*, enters ten LD
4.11 LD today 2019 TV 8 m  4.11 LD Sept. 30 - Oct. 9 Earth closest at 0656 UTC
4.22 LD Sept. 26 2017 KP27 23 m  9.60 to 10.57 LD Sept. 18 - today NHATS target, exits ten LD
4.38 LD Oct. 8 2019 TU 21 m  6.64 from 8.42 LD yesterday - Oct. 12 risk - DOU
4.50 LD Oct. 2 2019 TW 10 m  4.89 to 5.27 LD Sept. 21 - Oct. 13 NHATS target - DOU
4.5   LD Oct. 3* 2019 SH9 9 m  7.2 to 10.0 LD Sept. 30 - today EPU +/- 43 mins.*, exits ten LD
7.75 LD Oct. 8 2019 SB6 15 m  8.91 from 9.90 LD yesterday - Oct. 12 NHATS target
7.87 LD Oct. 3 2019 SL8 23 m  9.67 to 11.66 LD Oct. 1 - 5 exits ten LD
8.40 LD Oct. 8 2019 TS 27 m  9.56 from 10.51 LD today - Oct. 11 enters ten LD

This report was generated at 1922 UTC with the discoveries of approaching 2019 TT1 (MPEC) and already departed 2019 SU10 (DOU), which was picked up from Japan on September 25th and flew by at 1.88 LD fourteen and a half hours later. Today's DOU MPEC has follow-up for seven objects in the above and below active traffic tables and for five departed objects: 2019 SW5 and, all risk-listed, 2019 TF1, 2019 TB, 2019 SO6, and intruder 2019 SJ.

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  13.88 from 17.71 LD Oct. 7 - 12 risk - DOU
8.0   LD Oct. 9* 2019 TZ 15 m  12.0 from 14.0 LD Oct. 7 - 11 EPU +/- 9 mins.*
9.39 LD Oct. 8 2019 TM 36 m  11.87 from 13.84 LD Oct. 7 - 9 DOU
2.9   LD Oct. 13* 2019 TT1 22 m  23.5 from 26.5 LD Oct. 10 - 16 NEW, EPU +/- 2.02 hours* - MPEC
8.6   LD Oct. 12* 2019 SV9 28 m  22.8 from 25.6 LD Oct. 11 - 14 EPU +/- 8 mins.* - DOU
*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. "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 5 October '19

The MPC's NEO Confirmation Page has 65 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 65 objects listed. Of these, 50 were "one nighters." The Tracking News counted a total of 86 listings on the NEOCP on this day.

New MPECs  on 5 October '19

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there were eleven MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2019-T94 - "14:27 UT" - 2019 SB11


MPEC 2019-T93 - "13:36 UT" - 2019 TM1


MPEC 2019-T92 - "13:22 UT" - 2019 TU1


MPEC 2019-T91 - "13:16 UT" - 2019 TT1


MPEC 2019-T90 - "13:13 UT" - 2019 TS1


MPEC 2019-T89 - "13:09 UT" - 2019 TQ1


MPEC 2019-T88 - "13:06 UT" - 2019 TP1


MPEC 2019-T87 - "13:03 UT" - 2019 SC11


MPEC 2019-T86 - "13:01 UT" - 2019 TO1


MPEC 2019-T85 - "12:59 UT" - 2019 TN1


<< DOU on 5 October '19 >>  MPEC 2019-T84 - "12:19 UT" - Daily Orbit Update

Observers  on 5 October '19

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

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPECs 2019-T86, 2019-T88, 2019-T90, 2019-T91, 2019-T92, 2019-T93 & 2019-T94 -- 2019 TU1, 2019 TT1, 2019 TS1, 2019 TP1, 2019 TO1, 2019 TM1, 2019 SB11
T05ATLAS Haleakala in Hawaii, 13 in MPEC 2019-T84 -- 2019 MV3, 66146, 523934, 405212, 326742, 325395, 25330, 248926, 237805, 18172, 162082, 153842, 137084
T08ATLAS Mauna Loa in Hawaii, 61 in MPEC 2019-T84 -- 2019 LX4, 2019 LK5, 2019 GT3, 2015 VL142, 2015 PC228, 2014 XX7, 2014 PF68, 2014 NU64, 2012 PW, 2012 CK2, 2010 VW75, 2010 UH7, 2009 SP, 2009 QB36, 2008 SR1, 2005 VC2, 2002 SQ, 2001 QC34, 85839, 85713, 85709, 537342, 524603, 503960, 494880, 492143, 481985, 467475, 458745, 442243, 424089, 411201, 395289, 380160, 373428, 355256, 35107, 339714, 334412, 228502, 223456, 214088, 163760, 159399, 152942, 143947, 143527, 142555, 141593, 140333, 137052, 111253, 108906, 5626, 5189, 4183, 3102, 2059, 1866, 1865, 1620
160Castelmartini Obs. in Italy, 29 in MPEC 2019-T84 -- 2019 SZ, 2019 SU3, 2017 MN8, 2014 XX7, 2010 UH7, 2009 QB36, 2001 QC34, 96536, 85839, 85709, 537342, 530743, 503960, 494880, 492143, 481985, 458745, 442243, 373428, 339714, 162273, 142555, 141593, 140333, 6455, 5189, 4183, 3102, 2059
703Catalina Sky Survey (CSS) in Arizona, 21 in MPEC 2019-T84 -- 2019 SW5, 2019 SV4, 2019 SU3, 2019 PA, 2015 VL142, 2009 QB36, 2001 QC34, 530743, 523934, 481394, 459200, 455432, 340666, 254417, 237805, 20826, 18172, 162082, 141593, 137084, 112221
V06Catalina Sky Survey Kuiper Telescope in Arizona, 1 in MPEC 2019-T94 -- 2019 SB11
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 19 in MPECs 2019-T84, 2019-T85, 2019-T86, 2019-T88, 2019-T89, 2019-T90, 2019-T91 & 2019-T93 -- 2019 TU, 2019 TT1, 2019 TS1, 2019 TR, 2019 TQ1, 2019 TP1, 2019 TP, 2019 TO1, 2019 TN1, 2019 TM1, 2019 TM, 2019 TL, 2019 SV6, 2019 SV5, 2019 ST9, 2019 SF8, 2019 QV, 2019 LX4, 2019 KC4
C13Como Obs. in Italy, 2 in MPEC 2019-T84 -- 2019 GT3, 2010 UH7
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2019-T84 -- 2019 SM
G37Discovery Channel Telescope (DCT) in Arizona, 2 in MPEC 2019-T84 -- 2019 QR6, 2019 PR2
006Fabra Obs. in Spain, 1 in MPEC 2019-T84 -- 455432
W46Foxfire Village Obs., 1 in MPEC 2019-T84 -- 401857
J95Great Shefford Obs. in England, 2 in MPEC 2019-T84 -- 2019 TK, 2019 SV4
K85Kelmis Obs., 1 in MPEC 2019-T84 -- 2100
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 4 in MPEC 2019-T84 -- 2019 TF1, 2019 SO6, 2019 SJ, 2019 SD10
K91LCO Sutherland A in South Africa, 1 in MPEC 2019-T84 -- 2019 SL7
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2019-T84, 2019-T85, 2019-T86, 2019-T87, 2019-T88, 2019-T89, 2019-T90, 2019-T91, 2019-T92 & 2019-T93 -- 2019 TU1, 2019 TT1, 2019 TS1, 2019 TQ1, 2019 TP1, 2019 TO1, 2019 TN1, 2019 TM1, 2019 SC11, 413820, 5786, 4660
J69North Obs. in England, 1 in MPEC 2019-T84 -- 2019 TK
F51Pan-STARRS 1 (PS1) in Hawaii, 19 in MPECs 2019-T84, 2019-T87 & 2019-T94 -- 2019 SC11, 2019 SB11, 2019 NL6, 2019 LP, 2019 JP5, 2019 JM5, 2019 GZ19, 2019 EV2, 2016 PX66, 2015 VL142, 2015 OL35, 2006 FD51, 2001 QJ, 65733, 331471, 26166, 252373, 170903, 162723
586Pic du Midi Obs. in France, 2 in MPEC 2019-T84 -- 2019 SU3, 162082
654Pomona College Table Mtn. Obs. in southern California, 1 in MPEC 2019-T84 -- 1620
C95SATINO-1 in France, 1 in MPEC 2019-T84 -- 2006 SV189
K96Savelli Obs., 1 in MPEC 2019-T84 -- 2019 TK
033Schwarzschild Obs. in Germany, 1 in MPEC 2019-T84 -- 2019 TK
G40-program code "-" (22) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-T84 -- 2007 TQ24
691Spacewatch 0.9m telescope in Arizona, 8 in MPECs 2019-T84 & 2019-T94 -- 2019 SU3, 2019 SQ8, 2019 SL7, 2019 SB11, 2019 RU2, 88188, 29075, 4183
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2019-T84 -- 2019 TB, 2019 SO
I52Steward Obs. Mt. Lemmon Station in Arizona, 25 in MPECs 2019-T84, 2019-T85, 2019-T86, 2019-T87, 2019-T88, 2019-T89, 2019-T91, 2019-T92 & 2019-T93 -- 2019 TW, 2019 TU1, 2019 TU, 2019 TT1, 2019 TQ1, 2019 TP1, 2019 TO1, 2019 TN1, 2019 TM1, 2019 TM, 2019 TL, 2019 TB, 2019 SV9, 2019 SV4, 2019 SR2, 2019 SQ6, 2019 SO7, 2019 SH6, 2019 SH4, 2019 SC5, 2019 SC11, 2019 SA7, 2019 RO2, 2019 QV5, 4183
A16Tentlingen Obs. in Switzerland, 4 in MPEC 2019-T84 -- 96536, 442243, 152942, 140333
381Tokyo-Kiso Obs. in Japan, 1 in MPEC 2019-T84 -- 2019 SU10
L01Visnjan Obs., 1 in MPEC 2019-T92 -- 2019 TU1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 October '19

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2359 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 Sentry16002077-209931.682129e-07-7.83-7.850JPL: Computed at 06:59 today Pacific time based on 10 observations spanning 1.9359 days (2019-Oct-03.20483 to 2019-Oct-05.14068). Diameter approximately 0.015 km. from weighted mean H=26.82.
NEODyS16002077-209933.43e-07-7.52-7.550NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2019-10-03.206 to 2019-10-05.141."
2019 TF1JPL Sentry16002067-207034.2634e-09-9.65-9.700JPL: Computed at 07:29 today Pacific time based on 14 observations spanning 2.0164 days (2019-Oct-03.20388 to 2019-Oct-05.2203). Diameter approximately 0.011 km. from weighted mean H=27.47.
NEODyS16002042-207541.18e-08-9.08-9.390NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2019-10-03.205 to 2019-10-05.221."
2019 TUJPL Sentry16002067-2119299.11734111e-05-4.81-4.850JPL: Computed at 07:26 today Pacific time based on 25 observations spanning 1.9729 days (2019-Oct-03.26434 to 2019-Oct-05.23725). Diameter approximately 0.021 km. from weighted mean H=26.05.
NEODyS16002055-2117358.87e-05-4.83-4.850NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2019-10-03.265 to 2019-10-05.238."
2019 TBJPL Sentry1600R E M O V E DJPL: Risk listing removed at 1406 UTC today
2019 SD10JPL Sentry16002034-205876.060304e-07-5.46-5.720JPL: Computed at 07:04 today Pacific time based on 16 observations spanning 4.9184 days (2019-Sep-30.28036 to 2019-Oct-05.19878). Diameter approximately 0.040 km. from weighted mean H=24.63.
NEODyS16002034-205471.84e-07-6.01-6.220NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2019-09-30.281 to 2019-10-05.200."
2019 SQ8JPL Sentry16002094-211067.16796e-08-6.32-6.560JPL: Computed at 07:00 today Pacific time based on 20 observations spanning 5.7798 days (2019-Sep-29.42055 to 2019-Oct-05.20038). Diameter approximately 0.076 km. from weighted mean H=23.26.
NEODyS16002094-2113102.05e-07-5.88-6.090NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2019-09-29.421 to 2019-10-05.201."
2019 SL7JPL Sentry16002105-210515.428e-08-7.86-7.860JPL: Computed at 07:20 today Pacific time based on 26 observations spanning 8.6924 days (2019-Sep-26.43402 to 2019-Oct-05.12638). Diameter approximately 0.021 km. from weighted mean H=26.06.
NEODyS16002065-210531.27e-07-7.47-7.580NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2019-09-26.435 to 2019-10-05.127."
2019 SO6JPL Sentry16002077-210921.6173e-08-7.84-7.990JPL: Computed at 07:02 today Pacific time based on 19 observations spanning 8.9655 days (2019-Sep-26.29511 to 2019-Oct-05.26064). Diameter approximately 0.026 km. from weighted mean H=25.58.
NEODyS16002077-210921.89e-08-7.73-7.930NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2019-09-26.296 to 2019-10-05.261."
2019 SU3JPL Sentry16002084-2119500.00557044992-3.65-3.700JPL: Computed at 07:09 today Pacific time based on 100 observations spanning 12.033 days (2019-Sep-23.249638 to 2019-Oct-05.28261). Diameter approximately 0.013 km. from weighted mean H=27.13.
NEODyS16002084-21181925.71e-03-3.63-3.670NEODyS: "Based on 101 optical observations (of which 1 are rejected as outliers) from 2019-09-23.250 to 2019-10-05.283."
2019 SJJPL Sentry16002065-2119180.0004192590472-4.88-5.200JPL: Computed at 07:07 today Pacific time based on 40 observations spanning 16.805 days (2019-Sep-18.358702 to 2019-Oct-05.16334). Diameter approximately 0.011 km. from weighted mean H=27.50.
NEODyS16002062-2118371.63e-04-5.30-5.610NEODyS: "Based on 40 optical observations (of which 0 are rejected as outliers) from 2019-09-18.360 to 2019-10-05.164."

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 5 October '19

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

1922Generated Traffic Report
1600Noted 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 SJ risk assessment - see above
Noted that NEODyS has updated its 2019 SJ 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 updated its 2019 SO6 risk assessment - 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 JPL Sentry has removed 2019 TB as an impact risk - see above
Noted that JPL Sentry has updated its 2019 TF1 risk assessment - see above
Noted that NEODyS has updated its 2019 TF1 risk assessment - see above
Noted that JPL Sentry has posted 2019 TN1 as an impact risk - see above
Noted that NEODyS has posted 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-T84 - Daily Orbit Update - see above
Grabbed MPEC 2019-T85 - 2019 TN1 - see above
Grabbed MPEC 2019-T86 - 2019 TO1 - see above
Grabbed MPEC 2019-T87 - 2019 SC11 - see above
Grabbed MPEC 2019-T88 - 2019 TP1 - see above
Grabbed MPEC 2019-T89 - 2019 TQ1 - see above
Grabbed MPEC 2019-T90 - 2019 TS1 - see above
Grabbed MPEC 2019-T91 - 2019 TT1 - see above
Grabbed MPEC 2019-T92 - 2019 TU1 - see above
Grabbed MPEC 2019-T93 - 2019 TM1 - see above
Grabbed MPEC 2019-T94 - 2019 SB11 - see above