Contents  on 12 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 12 October '19

Fourteen objects reported inside ten LD

Fourteen minor planets are reported inside ten lunar distances (LD) of our home world today. Nearest is 2019 TZ6, which exits Earth's SOI as it moves away from 1.52 to 3.46 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. 8 2019 TM3 11 m  8.19 to 10.38 LD Oct. 3 - 12 exits ten LD
1.41 LD Oct. 9 2019 SL7 24 m  9.29 to 13.10 LD Oct. 7 - 12 exits ten LD, risk - DOU
1.43 LD yesterday 2019 TZ6 10 m  1.52 to 3.46 LD Oct. 8 - 15 exits Earth SOI
1.5   LD Oct. 8* 2019 TW1 9 m  9.8 to 12.4 LD Oct. 4 - 12 EPU +/- 9 mins.*, exits ten LD
2.5   LD Oct. 19* 2019 TK5 11 m  8.5 from 9.8 LD yesterday - Oct. 26 EPU +/- 8 mins.*, NHATS target, risk
2.90 LD tomorrow 2019 TT1 20 m  3.70 from 6.02 LD Oct. 10 - 16 DOU
3.67 LD Oct. 6 2019 TF3 9 m  7.28 to 8.27 LD Sept. 28 - Oct. 14 NHATS target
3.91 LD Oct. 14 2019 TA7 19 m  6.07 from 8.04 LD yesterday - Oct. 18
4.38 LD Oct. 8 2019 TU 21 m  9.31 to 11.30 LD Oct. 4 - 12 exits ten LD, risk
4.50 LD Oct. 2 2019 TW 10 m  8.94 to 9.66 LD Sept. 21 - tomorrow NHATS target
6.0   LD tomorrow* 2019 TB7 17 m  6.0 from 6.1 LD Oct. 6 - 19 EPU +/- 20 mins.*, NHATS target - DOU
7.75 LD Oct. 8 2019 SB6 15 m  9.89 to 11.06 LD Oct. 4 - 12 NHATS target, exits ten LD
8.56 LD today 2019 SV9 28 m  8.56 LD yesterday - Oct. 14 Earth closest at 2148 UTC - DOU
9.26 LD tomorrow 2019 TH2 18 m  9.27 from 9.52 LD yesterday - Oct. 15

This report was generated at 1840 UTC with radar observation of departed and until-now risk-listed 2019 SU3, and with follow-up in today's DOU MPEC for approaching 2019 TE2, inbound objects 2019 TB7 and 2019 TT1, passing 2019 SV9, outbound risk-listed 2019 SL7, and departed 2019 SD8.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
8.22 LD Oct. 18 2019 TE2 28 m  14.08 from 16.00 LD Oct. 15 - 20 DOU
8.2   LD Oct. 18* 2019 TP5 27 m  23.7 from 27.7 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. 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.

Radar Astrometry  on 12 October '19

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 0008 UTC when the database was dated 11 Oct.



Photometry and some astrometry is needed for upcoming radar targets. See Arecibo and Goldstone schedules.

NEOCP Activity  on 12 October '19

The MPC's NEO Confirmation Page has 45 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 45 objects listed. Of these, 21 were "one nighters." So far The Tracking News has counted a total of 48 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 12 October '19

Minor Planet Electronic Circulars

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


MPEC 2019-T220 - "22:39 UT" - 2019 TM7


<< DOU on 12 October '19 >>  MPEC 2019-T219 - "12:27 UT" - Daily Orbit Update

Observers  on 12 October '19

A total of 27 observers appear in today's MPECs.

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 2 in MPEC 2019-T219 -- 2100, 2059
251Arecibo in Puerto Rico, 1 in radar -- 2019 SU3
H21Astronomical Research Obs. Westfield in Illinois, 32 in MPEC 2019-T219 -- 2019 TT1, 2019 TO, 2019 TN2, 2019 SV10, 2019 SR10, 2019 SO5, 2019 SL7, 2019 SD8, 2019 SC11, 2019 RU1, 2019 RU, 2019 RK, 2019 QY3, 2019 QW3, 2019 PR1, 2019 GT3, 2018 YH, 2017 QW34, 2016 RN1, 2016 PX66, 2016 BA40, 2015 PN307, 2011 YH6, 2010 TC47, 2004 EO20, 2001 QC34, 96536, 85709, 26663, 18172, 108906, 4183
160Castelmartini Obs. in Italy, 6 in MPEC 2019-T219 -- 2014 PF68, 90403, 503960, 326777, 297418, 105140
W84%program code "%" (14) via DECam in Chile, 1 in MPEC 2019-T219 -- 2019 MF3
K87Dettelbach Vineyard Obs. in Germany, 12 in MPEC 2019-T219 -- 2019 TT1, 2019 TK1, 2019 TE2, 2019 TA4, 2019 SZ2, 2019 SM, 2019 SJ8, 2019 SH8, 2019 SC9, 2019 QR6, 2019 PR2, 2019 PA
F65Faulkes Telescope North in Hawaii, 1 in MPEC 2019-T219 -- 2015 NW9
K83Forti Obs., 1 in MPEC 2019-T219 -- 248926
U68JPL SynTrack Robotic Telescope, 1 in MPEC 2019-T219 -- 326777
V37LCO McDonald Obs. in Texas, 1 in MPEC 2019-T219 -- 2019 SV9
130Lumezzane Obs. in Italy, 2 in MPEC 2019-T219 -- 141593, 140333
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2019-T220 -- 2019 TM7
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2019-T219 -- 2019 JE6
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2019-T220 -- 2019 TM7
654Pomona College Table Mtn. Obs. (PCTMO) in southern California, 4 in MPEC 2019-T219 -- 90403, 537342, 326777, 141593
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2019-T219 -- 2019 NT6
H36Sandlot Obs. in Kansas, 1 in MPEC 2019-T220 -- 2019 TM7
C95SATINO-1 in France, 1 in MPEC 2019-T219 -- 2017 MN8
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-T219 -- 2005 VC2
G40'W.F. Cashwell in Nevada via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-T219 -- 494880
G40-program code "-" (22) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-T219 -- 2016 EX27
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2019-T219 -- 2010 UH7
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2019-T219 -- 216258
I52Steward Obs. Mt. Lemmon Station in Arizona, 2 in MPECs 2019-T219 & 2019-T220 -- 2019 TV1, 2019 TM7
A16Tentlingen Obs. in Switzerland, 3 in MPEC 2019-T219 -- 96536, 140333, 1620
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2019-T219 -- 2018 MQ5, 2018 KV1
L01Visnjan Obs., 2 in MPECs 2019-T219 & 2019-T220 -- 2019 TM7, 2019 TB7
C51WISE in Earth polar orbit, 2 in MPEC 2019-T219 -- 2006 DY, 66146
I41Zwicky Transient Facility (ZTF) in southern California, 9 in MPEC 2019-T219 -- 2019 SZ2, 2019 PR2, 2010 UH7, 2008 RH1, 68350, 489486, 162273, 138846, 1864
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 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 TF7NEODyS16002021-2115192.27e-08-3.14-3.170NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2019-10-07.439 to 2019-10-11.452."
2019 SL7NEODyS17012097-210524.31e-07-6.79-6.890NEODyS: "Based on 80 optical observations (of which 0 are rejected as outliers) from 2019-09-26.435 to 2019-10-09.294."
JPL Sentry16002097-210524.087e-07-6.81-6.960JPL: Computed at 07:00 today Pacific time based on 80 observations spanning 12.859 days (2019-Sep-26.43402 to 2019-Oct-09.292945). Diameter approximately 0.024 km. from weighted mean H=25.75.
2019 SU3NEODyS1701R E M O V E D-
JPL Sentry0057R E M O V E DJPL: Risk listing removed at 0033 UTC today
2006 SF281JPL Sentry00572020-21163441.2950153e-06-6.23-7.670JPL: Computed at 20:48 April 8th of 2017 Pacific time based on 16 observations spanning .02717 days (2006-Sep-30.48927 to 2006-Sep-30.51644). Diameter approximately 0.020 km. from weighted mean H=26.13.

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 12 October '19

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

2300Grabbed MPEC 2019-T220 - 2019 TM7 - see above
1840Generated Traffic Report
1701Noted that NEODyS has updated its 2019 SL7 risk assessment - see above
Noted that NEODyS has removed 2019 SU3 as an impact risk - see above
1600Noted that JPL Sentry has updated its 2019 SL7 risk assessment - see above
Noted that NEODyS has posted 2019 TF7 as an impact risk - see above
Grabbed MPEC 2019-T219 - Daily Orbit Update - see above
0057Noted that JPL Sentry has updated its 2006 SF281 risk assessment - see above
Noted that JPL Sentry has removed 2019 SU3 as an impact risk - see above
0008Noted Radar Astrometry database update - see above