Contents  on 12 October '18

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 '18

Nine objects reported inside ten LD

Bulletin - 2333, updated 2352 UTC:  Three new discoveries of close passers have been announced.

Earth passageI D~Size~Inside ten LDNotes
1.50 LD at 2237 UTC Oct. 72018 TY48 m Oct. 3 - 12MPEC
3.13 LD at 1343 UTC tomorrow2018 TB516 m Oct. 10 - 16MPEC
5.20 LD at 1652 UTC Oct. 72018 TT437 m Oct. 4 - 11MPEC


Nine transient natural objects are reported within ten lunar distances (LD) of Earth today. The nearest, 2018 TM3, is outbound from 4.61 to 5.27 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
0.74 LD Oct. 7 2018 TV 7 m  7.87 to 9.74 LD Oct. 2 - 13 intruder, NHATS target, risk
1.27 LD Oct. 8 2018 TG2 5 m  6.18 to 7.85 LD Oct. 2 - 14 NHATS target
3.1   LD Oct. 17* 2014 US7 18 m  9.6 from 11.5 LD today - Oct. 22 EPU +/- 3.10 hours*, NHATS target, enters ten LD
3.55 LD Oct. 8 2018 TM3 4 m  4.61 to 5.27 LD Sept. 29 - Oct. 18 NHATS target
5.17 LD yesterday 2018 TS4 11 m  5.18 to 5.24 LD Sept. 25 - Oct. 28 NEW - MPEC
6.59 LD Oct. 15 2018 TS1 23 m  9.19 from 11.05 LD today - Oct. 18 enters ten LD
6.67 LD Oct. 10 2018 TN3 8 m  7.15 to 7.88 LD Oct. 5 - 15
6.70 LD Oct. 8 2018 SG3 13 m  8.45 to 9.31 LD Oct. 2 - 13 NHATS target
6.84 LD yesterday 2018 TR4 35 m  6.84 to 7.30 LD Oct. 9 - 14 NEW - MPEC
* EPU = Earth passage uncertainty

This report was updated at 2333 UTC with the discoveries of outbound objects 2018 TS4 (MPEC) and 2018 TR4 (MPEC). See the table above for details.
        This report previously was expanded at 2040 UTC to add to this reporting three departed close passers, the discoveries of which were not caught here at the time. Two were announced in the DOU MPEC of October 4th, most importantly risk-listed intruder 2018 SN3, which passed Earth at about 0.51 LD on September 16th. The other, 2018 RX27, skimmed through our ten-LD reporting "bubble" at 9.86 LD on September 14th. The third discovery, 2018 TB3 (MPEC), passed Earth at 3.99 LD on September 30th and was announced on October 9th.
        Your first neighboring asteroids traffic report was generated at 1710 UTC with follow-up in today's DOU MPEC for two approaching objects (see "DOU" notation in traffic table below), and for four departed objects -- intruder 2018 TC and risk-listed objects 2018 TB2, 2018 TR, and 2018 TB.

Approaching - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
9.02 LD Oct. 15 2018 SL3 32 m  11.97 from 14.14 LD Oct. 14 - 17 DOU
9.04 LD Oct. 16 2018 TZ2 39 m  17.25 from 20.57 LD Oct. 15 - 18
8.7   LD Oct. 18* 2016 GC221 37 m  20.2 from 23.1 LD Oct. 17 - 20 EPU +/- 6.07 hours*
7.51 LD Oct. 29 475534 2006 TS7 195 m  68.23 from 72.42 LD Oct. 27 - 31
7.8   LD Nov. 5* 2018 TF3 292 m  114.3 from 119.5 LD Nov. 4 - 7 EPU +/- 2.15 hours*, risk - DOU



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 12 October '18

The MPC's NEO Confirmation Page has 38 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 38 objects listed. Of these, nineteen were "one nighters." So far The Tracking News has counted a total of 64 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 '18

Minor Planet Electronic Circulars

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


MPEC 2018-T156 - "23:26 UT" - 2018 TG5


MPEC 2018-T155 - "23:21 UT" - 2018 TF5


MPEC 2018-T154 - "23:17 UT" - 2018 TE5


MPEC 2018-T153 - "23:13 UT" - 2018 TD5


MPEC 2018-T152 - "23:09 UT" - 2018 TC5


MPEC 2018-T151 - "22:57 UT" - 2018 TB5


MPEC 2018-T150 - "22:52 UT" - 2018 TA5


MPEC 2018-T149 - "22:48 UT" - 2018 TZ4


MPEC 2018-T148 - "22:45 UT" - 2018 TY4


MPEC 2018-T147 - "22:41 UT" - 2018 TX4


MPEC 2018-T146 - "22:37 UT" - 2018 TW4


MPEC 2018-T145 - "22:33 UT" - 2018 TV4


MPEC 2018-T144 - "22:29 UT" - 2018 TU4


MPEC 2018-T143 - "22:25 UT" - 2018 TT4


MPEC 2018-T142 - "20:46 UT" - 2018 TS4


MPEC 2018-T141 - "20:40 UT" - 2018 TR4


MPEC 2018-T140 - "19:28 UT" - 2015 XQ55


<< DOU on 12 Oct. '18 >>  MPEC 2018-T139 - "12:07 UT" - Daily Orbit Update

Observers  on 12 October '18

A total of 48 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 23 in MPECs 2018-T139, 2018-T141, 2018-T142, 2018-T145, 2018-T146, 2018-T148, 2018-T149, 2018-T151, 2018-T152, 2018-T153, 2018-T154, 2018-T155 & 2018-T156 -- 2018 TZ4, 2018 TY4, 2018 TW4, 2018 TV4, 2018 TS4, 2018 TR4, 2018 TG5, 2018 TF5, 2018 TE5, 2018 TD5, 2018 TC5, 2018 TC, 2018 TB5, 2018 TB, 2018 SZ2, 2018 SU3, 2018 SR2, 2018 SQ3, 2018 SP3, 2018 SL3, 2018 SK1, 2018 SA2, 2018 QV1
T05ATLAS Haleakala in Hawaii, 22 in MPECs 2018-T139, 2018-T143 & 2018-T153 -- 2018 TT4, 2018 TP, 2018 TD5, 2018 RJ7, 2016 TZ56, 53789, 523628, 438429, 418929, 250697, 250458, 250162, 18109, 17274, 162168, 140333, 13553, 115052, 9856, 6456, 1865, 719
T08ATLAS Mauna Loa in Hawaii, 11 in MPECs 2018-T139, 2018-T143 & 2018-T153 -- 2018 TT4, 2018 TQ2, 2018 TD5, 2001 QA143, 65996, 54660, 54401, 442742, 349507, 3552, 3200
C77Bernezzo Obs. in Italy, 1 in MPEC 2018-T141 -- 2018 TR4
160Castelmartini Obs. in Italy, 6 in MPECs 2018-T139 & 2018-T141 -- 2018 TR4, 2011 UA, 2001 QA143, 523631, 443923, 115052
703Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2018-T139 & 2018-T141 -- 2018 TR4, 443923, 17274, 5143
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 2 in MPECs 2018-T146 & 2018-T147 -- 2018 TX4, 2018 TW4
K51Celado Obs. in Italy, 1 in MPEC 2018-T141 -- 2018 TR4
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2018-T143 & 2018-T150 -- 2018 TT4, 2018 TA5
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2018-T141 -- 2018 TR4
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2018-T153 -- 2018 TD5
958Dax Obs. in France, 1 in MPEC 2018-T141 -- 2018 TR4
151Eschenberg Obs. in Switzerland, 2 in MPEC 2018-T139 -- 2018 TP, 2011 UA
595Farra d'Isonzo Obs. in Italy, 3 in MPECs 2018-T141, 2018-T151 & 2018-T152 -- 2018 TR4, 2018 TC5, 2018 TB5
K88GINOP-KHK in Hungary, 10 in MPECs 2018-T141, 2018-T142, 2018-T144, 2018-T146, 2018-T147, 2018-T148, 2018-T149, 2018-T151, 2018-T152 & 2018-T156 -- 2018 TZ4, 2018 TY4, 2018 TX4, 2018 TW4, 2018 TU4, 2018 TS4, 2018 TR4, 2018 TG5, 2018 TC5, 2018 TB5
J95Great Shefford Obs. in England, 5 in MPECs 2018-T141, 2018-T144, 2018-T151, 2018-T152 & 2018-T153 -- 2018 TU4, 2018 TR4, 2018 TD5, 2018 TC5, 2018 TB5
A17Guidestar Obs. in Germany, 4 in MPECs 2018-T141, 2018-T144, 2018-T151 & 2018-T152 -- 2018 TU4, 2018 TR4, 2018 TC5, 2018 TB5
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2018-T141 -- 2018 TR4
L28ISON Castelgrande Obs., 1 in MPEC 2018-T141 -- 2018 TR4
H06#M. Suzuki in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-T141 -- 2018 TR4
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-T141 -- 2018 TR4
585Kiev Comet Station in Ukraine, 1 in MPEC 2018-T141 -- 2018 TR4
246KLENOT in the Czech Republic, 6 in MPECs 2018-T141, 2018-T144, 2018-T151, 2018-T152, 2018-T154 & 2018-T155 -- 2018 TU4, 2018 TR4, 2018 TF5, 2018 TE5, 2018 TC5, 2018 TB5
K30Luscherz Obs. in Switzerland, 1 in MPEC 2018-T141 -- 2018 TR4
K38M57 Obs. in Italy, 1 in MPEC 2018-T141 -- 2018 TR4
H01Magdalena Ridge Obs. (MRO) in New Mexico, 7 in MPECs 2018-T142, 2018-T144, 2018-T145, 2018-T146, 2018-T147, 2018-T148 & 2018-T149 -- 2018 TZ4, 2018 TY4, 2018 TX4, 2018 TW4, 2018 TV4, 2018 TU4, 2018 TS4
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2018-T142, 2018-T144, 2018-T145, 2018-T146, 2018-T147, 2018-T148 & 2018-T149 -- 2018 TZ4, 2018 TY4, 2018 TX4, 2018 TW4, 2018 TV4, 2018 TU4, 2018 TS4
Z80Northolt Branch Obs. in England, 1 in MPEC 2018-T141 -- 2018 TR4
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2018-T141 -- 2018 TR4
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2018-T139 -- 2018 PE22
F52Pan-STARRS 2 (PS2) in Hawaii, 11 in MPECs 2018-T141, 2018-T142, 2018-T145, 2018-T146, 2018-T147, 2018-T150, 2018-T151, 2018-T152, 2018-T154, 2018-T155 & 2018-T156 -- 2018 TX4, 2018 TW4, 2018 TV4, 2018 TS4, 2018 TR4, 2018 TG5, 2018 TF5, 2018 TE5, 2018 TC5, 2018 TB5, 2018 TA5
K63Pascoli Obs. in Italy, 1 in MPEC 2018-T144 -- 2018 TU4
K80Platanus Obs., 1 in MPEC 2018-T141 -- 2018 TR4
D29Purple Mtn. Obs. Xuyi Station in China, 25 in MPEC 2018-T139 -- 2018 QP, 2018 PE22, 2018 NB, 2018 LZ5, 2015 TN237, 2013 VD13, 2010 VB72, 2010 SH13, 65733, 55532, 523788, 523621, 523604, 523596, 481394, 42286, 418929, 413002, 388567, 375505, 256412, 170891, 138815, 100085, 9058
L04ROASTERR-1 in Romania, 1 in MPEC 2018-T141 -- 2018 TR4
247roving observer, 1 in MPEC 2018-T141 -- 2018 TR4
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2018-T144 & 2018-T152 -- 2018 TU4, 2018 TC5
C95SATINO-1 in France, 1 in MPEC 2018-T139 -- 141527
204Schiaparelli Obs. in Italy, 2 in MPECs 2018-T144 & 2018-T152 -- 2018 TU4, 2018 TC5
291Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2018-T139, 2018-T150, 2018-T154 & 2018-T155 -- 2018 TY2, 2018 TF5, 2018 TE5, 2018 TA5
W34Squirrel Valley Obs. in North Carolina, 2 in MPECs 2018-T139 & 2018-T141 -- 2018 TR4, 85804
C36Starry Wanderer Obs. in Belarus, 1 in MPEC 2018-T139 -- 2061
I52Steward Obs. Mt. Lemmon Station in Arizona, 6 in MPECs 2018-T141, 2018-T142, 2018-T144, 2018-T145, 2018-T148 & 2018-T149 -- 2018 TZ4, 2018 TY4, 2018 TV4, 2018 TU4, 2018 TS4, 2018 TR4
A16Tentlingen Obs. in Switzerland, 2 in MPEC 2018-T139 -- 31345, 3691
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 8 in MPECs 2018-T139 & 2018-T140 -- 2018 TY2, 2018 TS2, 2018 TR, 2018 TF3, 2018 TB2, 2018 TB, 2018 SO3, 2015 XQ55
L01Visnjan Obs., 14 in MPECs 2018-T141, 2018-T142, 2018-T144, 2018-T145, 2018-T146, 2018-T147, 2018-T148, 2018-T149, 2018-T151, 2018-T152, 2018-T153, 2018-T154, 2018-T155 & 2018-T156 -- 2018 TZ4, 2018 TY4, 2018 TX4, 2018 TW4, 2018 TV4, 2018 TU4, 2018 TS4, 2018 TR4, 2018 TG5, 2018 TF5, 2018 TE5, 2018 TD5, 2018 TC5, 2018 TB5
718Wiggins Obs. in Utah, 1 in MPEC 2018-T141 -- 2018 TR4
C51WISE in Earth polar orbit, 6 in MPEC 2018-T139 -- 96315, 65706, 52387, 25916, 21277, 100085
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 October '18

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
2018 TF3JPL Sentry15002108-2117156.550198e-07-3.98-4.220JPL: Computed at 07:33 today Pacific time based on 36 observations spanning 5.1239 days (2018-Oct-06.3505 to 2018-Oct-11.474379). Diameter approximately 0.291 km. from weighted mean H=20.34.
NEODyS15002092-2118211.23e-06-3.68-4.11-NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2018-10-06.351 to 2018-10-10.361."
2018 TY2JPL Sentry15002093-209312.105e-09-5.45-5.450JPL: Computed at 07:33 today Pacific time based on 36 observations spanning 6.1214 days (2018-Oct-05.36608 to 2018-Oct-11.48749). Diameter approximately 0.570 km. from weighted mean H=18.87.
2018 TS2NEODyS1500R E M O V E D-
2018 TB2NEODyS1500R E M O V E D-
2018 TRJPL Sentry15002103-2116102.511576e-06-6.21-6.630JPL: Computed at 07:29 today Pacific time based on 53 observations spanning 8.9825 days (2018-Oct-02.30976 to 2018-Oct-11.292286). Diameter approximately 0.028 km. from weighted mean H=25.38.
NEODyS15002089-2118354.71e-06-5.94-6.6-NEODyS: "Based on 52 optical observations (of which 0 are rejected as outliers) from 2018-10-02.311 to 2018-10-11.209."
2018 TBJPL Sentry15002095-210326.9861e-07-6.38-6.430JPL: Computed at 07:23 today Pacific time based on 153 observations spanning 9.0553 days (2018-Oct-02.42196 to 2018-Oct-11.477219). Diameter approximately 0.037 km. from weighted mean H=24.81.
NEODyS15002095-210321.17e-06-6.19-6.220NEODyS: "Based on 152 optical observations (of which 1 are rejected as outliers) from 2018-10-02.423 to 2018-10-10.565."
2018 SN3NEODyS15002033-21181892.94e-04-5.79-6.08-NEODyS: "Based on 8 optical observations (of which 0 are rejected as outliers) from 2018-09-18.413 to 2018-09-19.436."
2016 WM1NEODyS1500R E M O V E D-

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 '18

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

2333Updated Traffic Report
2331Grabbed MPEC 2018-T152 - 2018 TC5 - see above
Grabbed MPEC 2018-T153 - 2018 TD5 - see above
Grabbed MPEC 2018-T154 - 2018 TE5 - see above
Grabbed MPEC 2018-T155 - 2018 TF5 - see above
Grabbed MPEC 2018-T156 - 2018 TG5 - see above
2308Grabbed MPEC 2018-T143 - 2018 TT4 - see above
Grabbed MPEC 2018-T144 - 2018 TU4 - see above
Grabbed MPEC 2018-T145 - 2018 TV4 - see above
Grabbed MPEC 2018-T146 - 2018 TW4 - see above
Grabbed MPEC 2018-T147 - 2018 TX4 - see above
Grabbed MPEC 2018-T148 - 2018 TY4 - see above
Grabbed MPEC 2018-T149 - 2018 TZ4 - see above
Grabbed MPEC 2018-T150 - 2018 TA5 - see above
Grabbed MPEC 2018-T151 - 2018 TB5 - see above
2103Grabbed MPEC 2018-T141 - 2018 TR4 - see above
Grabbed MPEC 2018-T142 - 2018 TS4 - see above
2030Grabbed MPEC 2018-T140 - 2015 XQ55 - see above
1500Noted that NEODyS has removed 2016 WM1 as an impact risk - see above
Noted that NEODyS has posted 2018 SN3 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 TB risk assessment - see above
Noted that NEODyS has updated its 2018 TB risk assessment - see above
Noted that NEODyS has removed 2018 TB2 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 TF3 risk assessment - see above
Noted that NEODyS has updated its 2018 TF3 risk assessment - see above
Noted that JPL Sentry has updated its 2018 TR risk assessment - see above
Noted that NEODyS has updated its 2018 TR risk assessment - see above
Noted that NEODyS has removed 2018 TS2 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 TY2 risk assessment - see above
Grabbed MPEC 2018-T139 - Daily Orbit Update - see above