Contents  on 11 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 11 October '19

Twenty objects reported inside ten LD

There are twenty asteroids reported to be less than ten lunar distances (LD) from Earth today. The nearest is inside our planet's gravitational sphere of influence. Newly announced 2019 TZ6 comes its closest to us this time around, reaching 1.43 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
1.25 LD Oct. 4 2019 TX 6 m  9.78 to 11.39 LD Sept. 28 - today NHATS target, exits ten LD, risk
1.25 LD Oct. 8 2019 TM3 11 m  6.01 to 8.19 LD Oct. 3 - 12
1.41 LD Oct. 9 2019 SL7 23 m  5.54 to 9.29 LD Oct. 7 - 12 risk
1.43 LD today 2019 TZ6 10 m  1.43 LD Oct. 8 - 15 NEW, Moon closest 1.81 LD at 1312 UTC,
Earth closest at 1912 UTC - MPEC
1.5   LD Oct. 8* 2019 TW1 9 m  7.2 to 9.8 LD Oct. 4 - 12 EPU +/- 9 mins.*
2.48 LD Oct. 8 2019 TJ5 15 m  8.67 to 11.40 LD Oct. 4 - 11 exits ten LD, risk - DOU
2.5   LD Oct. 19* 2019 TK5 11 m  9.8 from 11.0 LD today - Oct. 26 EPU +/- 8 mins.*, NHATS target, enters
ten LD, risk - DOU
2.90 LD Oct. 13 2019 TT1 21 m  6.02 from 8.77 LD yesterday - Oct. 16 DOU
3.5   LD Oct. 8* 2019 TC1 12 m  8.2 to 10.9 LD Oct. 5 - 11 EPU +/- 50 mins.*, exits ten LD
3.67 LD Oct. 6 2019 TF3 9 m  6.33 to 7.28 LD Sept. 28 - Oct. 14 NHATS target
3.91 LD Oct. 14 2019 TA7 19 m  8.04 from 10.18 LD today - Oct. 18 NEW, enters ten LD - MPEC
4.07 LD Oct. 4 2019 TO6 6 m  8.86 to 10.04 LD Sept. 27 - today exits ten LD
4.38 LD Oct. 8 2019 TU 21 m  7.43 to 9.31 LD Oct. 4 - 12 risk
4.50 LD Oct. 2 2019 TW 10 m  8.23 to 8.94 LD Sept. 21 - Oct. 13 NHATS target
6.0   LD Oct. 13* 2019 TB7 17 m  6.1 from 6.5 LD Oct. 6 - 19 NEW, EPU +/- 22 mins.* - MPEC
7.75 LD Oct. 8 2019 SB6 15 m  8.91 to 9.89 LD Oct. 4 - 12 NHATS target
8.02 LD Oct. 9 2019 TZ 17 m  9.01 to 10.47 LD Oct. 7 - 11 exits ten LD
8.41 LD Oct. 8 2019 TS 28 m  9.38 to 10.27 LD Oct. 5 - 11 exits ten LD
8.56 LD tomorrow 2019 SV9 30 m  8.99 from 10.33 LD today - Oct. 14 enters ten LD
9.26 LD Oct. 13 2019 TH2 18 m  9.52 from 10.08 LD today - Oct. 15 enters ten LD

This report was generated at 1852 UTC with three discoveries. 2019 TB7 (MPEC) and 2019 TA7 (MPEC) are both inbound and 2019 TZ6 (MPEC) is passing. Today's DOU MPEC has follow-up for inbound objects 2019 TT1 and risk-listed 2019 TK5, for outbound risk-listed 2019 TJ5, and for departed risk-listed 2019 SU3, plus distant 163899 2003 SD220.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
8.30 LD Oct. 18 2019 TE2 26 m  16.15 from 18.18 LD Oct. 15 - 20
8.2   LD Oct. 18* 2019 TP5 27 m  27.7 from 31.8 LD Oct. 16 - 19 EPU +/- 13 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 an object under observation that has come within ten LD since A/CC began this traffic reporting (2007) but is not now 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 11 October '19

The MPC's NEO Confirmation Page has 49 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 49 objects listed. Of these, 23 were "one nighters." So far The Tracking News has counted a total of 68 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 11 October '19

Minor Planet Electronic Circulars

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


MPEC 2019-T218 - "16:40 UT" - 2019 TH7


MPEC 2019-T217 - "16:25 UT" - 2019 TH6


MPEC 2019-T216 - "15:39 UT" - 2019 TG7


MPEC 2019-T215 - "15:10 UT" - 2019 TF7


MPEC 2019-T214 - "13:42 UT" - 2019 TB7


MPEC 2019-T213 - "13:40 UT" - 2019 TA7


MPEC 2019-T212 - "13:38 UT" - 2019 TZ6


MPEC 2019-T211 - "13:36 UT" - 2019 TY6


MPEC 2019-T210 - "13:31 UT" - 2019 TX6


MPEC 2019-T209 - "13:28 UT" - 2019 TW6


MPEC 2019-T208 - "13:20 UT" - 2019 TV6


<< DOU on 11 October '19 >>  MPEC 2019-T207 - "12:02 UT" - Daily Orbit Update

Observers  on 11 October '19

A total of 30 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPECs 2019-T207, 2019-T210 & 2019-T218 -- 2019 TX6, 2019 TH7, 2019 SS8, 2019 SN5, 2019 RX3, 2017 QW34, 2016 WX9
073Bucharest Obs. in Romania, 2 in MPEC 2019-T207 -- 339714, 18172
Z36Cancelada Obs., 1 in MPEC 2019-T207 -- 2017 MN8
160Castelmartini Obs. in Italy, 16 in MPEC 2019-T207 -- 2017 MN8, 2010 UH7, 85839, 530743, 481985, 481394, 458745, 442243, 162723, 162273, 153814, 142555, 141593, 6455, 5189, 3102
703Catalina Sky Survey (CSS) in Arizona, 16 in MPEC 2019-T207 -- 2019 JF1, 2017 MN8, 2010 UH7, 89830, 528609, 491565, 348461, 254417, 237805, 162723, 162273, 138877, 137084, 112221, 10145, 1627
309'Martin Altmann in Germany via Cerro Paranal in Chile, 1 in MPEC 2019-T207 -- 2019 RX
K87Dettelbach Vineyard Obs. in Germany, 4 in MPECs 2019-T207, 2019-T213 & 2019-T214 -- 2019 TK1, 2019 TB7, 2019 TA7, 2019 PA
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2019-T212 -- 2019 TZ6
K83Forti Obs., 3 in MPEC 2019-T207 -- 297418, 18172, 6455
157Frasso Sabino Obs. in Italy, 1 in MPEC 2019-T207 -- 2019 SC9
695^Spacewatch via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2019-T207 -- 2019 QO1
K92LCO Sutherland B in South Africa, 1 in MPEC 2019-T207 -- 2019 TT1
H01Magdalena Ridge Obs. (MRO) in New Mexico, 8 in MPECs 2019-T208, 2019-T209, 2019-T210, 2019-T211, 2019-T212, 2019-T214, 2019-T216 & 2019-T218 -- 2019 TZ6, 2019 TY6, 2019 TX6, 2019 TW6, 2019 TV6, 2019 TH7, 2019 TG7, 2019 TB7
568^R. Wainscoat on Mauna Kea in Hawaii, 2 in MPEC 2019-T207 -- 2019 TN4, 2019 TB4
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2019-T207 -- 2019 SM, 2017 MN8
V36MPC code V36, 1 in MPEC 2019-T207 -- 248926
Z30MPC code Z30, 1 in MPEC 2019-T207 -- 162082
G96Mt. Lemmon Survey (MLS) in Arizona, 28 in MPECs 2019-T207, 2019-T208, 2019-T209, 2019-T210, 2019-T211, 2019-T212, 2019-T213, 2019-T214, 2019-T215, 2019-T216 & 2019-T218 -- 2019 TZ6, 2019 TY6, 2019 TX6, 2019 TW6, 2019 TV6, 2019 TH7, 2019 TG7, 2019 TF7, 2019 TB7, 2019 TA7, 2019 SE11, 2019 RH1, 2019 LE5, 2017 MN8, 2015 VL142, 2015 FJ, 2012 PW, 2010 JV34, 2009 MC9, 2008 TC2, 2005 YN3, 2000 WO148, 503871, 409342, 192563, 190788, 163081, 162273
Z80Northolt Branch Obs. in England, 3 in MPEC 2019-T207 -- 2019 TJ5, 2019 SM, 2016 EX27
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2019-T207, 2019-T208, 2019-T209 & 2019-T217 -- 2019 TW6, 2019 TV6, 2019 TH6, 2019 SV7, 2019 QO1
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2019-T208 -- 2019 TV6
654Pomona College Table Mtn. Obs. in southern California, 1 in MPEC 2019-T207 -- 2007 TQ24
C95SATINO-1 in France, 1 in MPEC 2019-T207 -- 2006 TD1
204Schiaparelli Obs. in Italy, 2 in MPECs 2019-T212 & 2019-T214 -- 2019 TZ6, 2019 TB7
G40-program code "-" (22) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-T207 -- 2017 MN8
691Spacewatch 0.9m telescope in Arizona, 7 in MPEC 2019-T207 -- 2019 TK5, 2019 TJ5, 2019 SU3, 2019 SK7, 2019 QZ1, 2019 LX4, 2014 PF68
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2019-T207 -- 2019 TC
I52Steward Obs. Mt. Lemmon Station in Arizona, 25 in MPECs 2019-T207, 2019-T208, 2019-T209, 2019-T210, 2019-T211, 2019-T212, 2019-T213, 2019-T214, 2019-T215, 2019-T216 & 2019-T218 -- 2019 TZ6, 2019 TY6, 2019 TX6, 2019 TW6, 2019 TV6, 2019 TU1, 2019 TQ4, 2019 TQ3, 2019 TO3, 2019 TO, 2019 TN2, 2019 TJ5, 2019 TH7, 2019 TH5, 2019 TG7, 2019 TF7, 2019 TE3, 2019 TC4, 2019 TB7, 2019 TA7, 2019 TA4, 2019 SK8, 2019 SH6, 2019 SH4, 2019 RU3
L01Visnjan Obs., 8 in MPECs 2019-T208, 2019-T209, 2019-T210, 2019-T211, 2019-T212, 2019-T213, 2019-T215 & 2019-T216 -- 2019 TZ6, 2019 TY6, 2019 TX6, 2019 TW6, 2019 TV6, 2019 TG7, 2019 TF7, 2019 TA7
I41Zwicky Transient Facility (ZTF) in southern California, 20 in MPEC 2019-T207 -- 2019 MK2, 2014 HH192, 2010 UH7, 2006 KE, 96590, 85628, 481984, 442243, 334412, 326742, 326291, 243025, 237805, 163899, 154991, 137805, 5693, 4487, 3691, 3200
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 11 October '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 TF7JPL Sentry17002021-2118334.0809e-08-2.92-2.960JPL: Computed at 09:32 today Pacific time based on 22 observations spanning 4.0130 days (2019-Oct-07.43792 to 2019-Oct-11.45093). Diameter approximately 0.820 km. from weighted mean H=18.07.
2019 TK5JPL Sentry16102061-2119732.51318454e-05-6.14-6.910JPL: Computed at 07:23 today Pacific time based on 21 observations spanning 2.8879 days (2019-Oct-08.33166 to 2019-Oct-11.21958). Diameter approximately 0.011 km. from weighted mean H=27.53.
NEODyS16102061-21181381.41e-05-6.32-7.140NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2019-10-08.332 to 2019-10-11.220."
2019 TJ5JPL Sentry16102086-208615.808e-08-8.16-8.160JPL: Computed at 07:17 today Pacific time based on 24 observations spanning 1.9972 days (2019-Oct-09.21667 to 2019-Oct-11.21387). Diameter approximately 0.015 km. from weighted mean H=26.72.
NEODyS16102086-210731.24e-07-7.86-7.90NEODyS: "Based on 27 optical observations (of which 3 are rejected as outliers) from 2019-10-09.217 to 2019-10-11.215."
2019 TCNEODyS1610R E M O V E D-
2019 SE11JPL Sentry16102042-206444.0723e-09-8.37-8.730JPL: Computed at 06:58 today Pacific time based on 8 observations spanning 1.0095 days (2019-Sep-21.21679 to 2019-Sep-22.22632). Diameter approximately 0.028 km. from weighted mean H=25.40.
2019 SU3JPL Sentry21312084-2119640.00607629395-3.64-3.670JPL #2 for the day: Computed at 13:10 today Pacific time based on 120 observations spanning 17.928 days (2019-Sep-23.249638 to 2019-Oct-11.17757). Diameter approximately 0.012 km. from weighted mean H=27.20.
NEODyS16102084-21181422.91e-03-3.97-4.050NEODyS: "Based on 139 optical observations (of which 2 are rejected as outliers) from 2019-09-23.250 to 2019-10-11.178."
2019 RT3JPL Sentry21312075-2117200.0001324063-4.18-4.270JPL: Computed at 13:33 today Pacific time based on 99 observations spanning 28.758 days (2019-Sep-11.603747 to 2019-Oct-10.36126). Diameter approximately 0.031 km. from weighted mean H=25.19.

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 11 October '19

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

2131Noted that JPL Sentry has updated its 2019 RT3 risk assessment - see above
Noted that JPL Sentry has updated its 2019 SU3 risk assessment - see above
1852Generated Traffic Report
1700Noted that JPL Sentry has posted 2019 TF7 as an impact risk - see above
Grabbed MPEC 2019-T218 - 2019 TH7 - see above
1633Grabbed MPEC 2019-T217 - 2019 TH6 - see above
1610Noted that JPL Sentry has posted 2019 SE11 as an impact risk - 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 removed 2019 TC as an impact risk - see above
Noted that JPL Sentry has updated its 2019 TJ5 risk assessment - see above
Noted that NEODyS has updated its 2019 TJ5 risk assessment - see above
Noted that JPL Sentry has updated its 2019 TK5 risk assessment - see above
Noted that NEODyS has updated its 2019 TK5 risk assessment - see above
Grabbed MPEC 2019-T207 - Daily Orbit Update - see above
Grabbed MPEC 2019-T208 - 2019 TV6 - see above
Grabbed MPEC 2019-T209 - 2019 TW6 - see above
Grabbed MPEC 2019-T210 - 2019 TX6 - see above
Grabbed MPEC 2019-T211 - 2019 TY6 - see above
Grabbed MPEC 2019-T212 - 2019 TZ6 - see above
Grabbed MPEC 2019-T213 - 2019 TA7 - see above
Grabbed MPEC 2019-T214 - 2019 TB7 - see above
Grabbed MPEC 2019-T215 - 2019 TF7 - see above
Grabbed MPEC 2019-T216 - 2019 TG7 - see above