Contents  on 10 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 10 October '18

Eleven objects reported inside ten LD

There are eleven Solar-System small bodies reported passing within ten lunar distances (LD) of Earth today. Nearest are 2018 TG2, which moves away from 2.94 to 4.53 LD, and 2018 TM3, outbound from 3.69 to 4.07 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
0.23 LD Sept. 25 2018 SD2 6 m  9.92 to 10.58 LD Sept. 10 - today intruder, NHATS target, exits ten LD, risk
0.74 LD Oct. 7 2018 TV 7 m  4.15 to 6.00 LD Oct. 2 - 13 intruder, NHATS target, risk
1.27 LD Oct. 8 2018 TG2 5 m  2.94 to 4.53 LD Oct. 2 - 14 NHATS target
1.27 LD Oct. 8 2018 TE2 7 m  4.89 to 7.85 LD Oct. 5 - 11
2.80 LD Oct. 3 2018 TH3 5 m  8.48 to 9.66 LD Sept. 25 - tomorrow NHATS target
3.55 LD Oct. 8 2018 TM3 4 m  3.69 to 4.07 LD Sept. 29 - Oct. 18 NHATS target - DOU
4.30 LD Oct. 6 2018 TW1 10 m  7.84 to 9.40 LD Oct. 1 - 11
6.67 LD today 2018 TN3 8 m  6.67 LD Oct. 5 - 15 Earth closest at 1021 UTC - DOU
6.70 LD Oct. 8 2018 SG3 13 m  7.16 to 7.73 LD Oct. 2 - 13 NHATS target
7.46 LD Oct. 7 2018 TF2 17 m  9.19 to 10.84 LD Oct. 5 - 10 exits ten LD - DOU
8.12 LD Oct. 8 2018 TY1 20 m  9.35 to 10.73 LD Oct. 5 - 10 exits ten LD - DOU

This report was generated at 1911 UTC with the recovery of distant 2015 TB145 (MPEC), and with follow-up in today's DOU MPEC for seven objects active in the traffic tables above and below and for six departed objects: 2018 TO3, 2018 TC, 2017 SL16, and including 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
6.59 LD Oct. 15 2018 TS1 23 m  13.11 from 15.30 LD Oct. 12 - 18 NHATS target - DOU
3.1   LD Oct. 17* 2014 US7 18 m  13.4 from 15.2 LD Oct. 12 - 22 EPU +/- 3.10 hours*, NHATS target
9.03 LD Oct. 15 2018 SL3 32 m  16.61 from 19.23 LD Oct. 14 - 17 DOU
9.1   LD Oct. 16* 2018 TZ2 39 m  24.1 from 27.6 LD Oct. 15 - 18 EPU +/- 5 mins.*
8.7   LD Oct. 18* 2016 GC221 37 m  26.2 from 29.3 LD Oct. 17 - 20 EPU +/- 6.07 hours*
7.51 LD Oct. 29 475534 2006 TS7 195 m  76.63 from 80.86 LD Oct. 27 - 31
7.7   LD Nov. 5* 2018 TF3 298 m  124.5 from 129.7 LD Nov. 4 - 7 EPU +/- 6.38 hours*, risk - 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. "Distant" is used here to describe an object that has come within ten LD since A/CC began these traffic reports (2007) but is not now so close. Object temporal distances are derived by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 10 October '18

The MPC's NEO Confirmation Page has 68 listings

When last checked at 2323 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 68 objects listed. Of these, 57 were "one nighters." So far The Tracking News has counted a total of 89 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 10 October '18

Minor Planet Electronic Circulars

As of last check at 2319 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-T135 - "21:53 UT" - 2013 SO20


MPEC 2018-T134 - "14:48 UT" - 2018 TE4


MPEC 2018-T133 - "14:43 UT" - 2018 TD4


MPEC 2018-T132 - "14:38 UT" - 2018 TC4


MPEC 2018-T131 - "14:31 UT" - 2018 TB4


MPEC 2018-T130 - "14:21 UT" - 2015 TB145


<< DOU on 10 Oct. '18 >>  MPEC 2018-T129 - "12:06 UT" - Daily Orbit Update

Observers  on 10 October '18

A total of 40 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPECs 2018-T129 & 2018-T134 -- 2018 TV2, 2018 TK2, 2018 TJ3, 2018 TE4, 2018 TE3, 2018 TC3, 2018 TA3
T05ATLAS Haleakala in Hawaii, 10 in MPEC 2018-T129 -- 2001 QA143, 88263, 65996, 54401, 468481, 455550, 349507, 3552, 3200, 1981
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2018-T129 -- 155140
069Baldone Obs. in Latvia, 1 in MPEC 2018-T129 -- 515010
160Castelmartini Obs. in Italy, 4 in MPEC 2018-T129 -- 86324, 53789, 155140, 105140
703Catalina Sky Survey in Arizona, 1 in MPEC 2018-T129 -- 523595
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 5 in MPECs 2018-T129, 2018-T131, 2018-T132 & 2018-T133 -- 2018 TD4, 2018 TC4, 2018 TB4, 2018 TA2, 2013 EU9
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2018-T131 & 2018-T133 -- 2018 TD4, 2018 TB4
006Fabra Obs. in Spain, 3 in MPEC 2018-T129 -- 418929, 18109, 13553
K83Forti Obs., 2 in MPEC 2018-T129 -- 523604, 418929
E89Geyserland Obs. in New Zealand, 2 in MPEC 2018-T129 -- 18109, 17274
K88GINOP-KHK in Hungary, 1 in MPEC 2018-T134 -- 2018 TE4
E94Gisborne Obs. in New Zealand, 2 in MPEC 2018-T129 -- 2018 TC3, 2018 RJ7
J95Great Shefford Obs. in England, 6 in MPECs 2018-T129 & 2018-T134 -- 2018 TP3, 2018 TO3, 2018 TN3, 2018 TM3, 2018 TF2, 2018 TE4
A17Guidestar Obs. in Germany, 5 in MPEC 2018-T129 -- 2018 TW, 2018 TQ2, 2018 SR2, 2018 SN, 155140
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-T129 -- 155140
Z43Landehen Obs., 3 in MPEC 2018-T129 -- 2018 TQ2, 2018 PE22, 414960
152Moletai Obs. in Lithuania, 1 in MPEC 2018-T129 -- 3552
474Mt. John Obs. in New Zealand, 1 in MPEC 2018-T133 -- 2018 TD4
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2018-T132, 2018-T133 & 2018-T134 -- 2018 TE4, 2018 TD4, 2018 TC4
C47Nonndorf Obs. in Austria, 2 in MPEC 2018-T129 -- 2018 SA3, 2018 PE22
J69North Obs. in England, 4 in MPEC 2018-T129 -- 2018 TQ2, 2018 SL3, 18109, 433
Z80Northolt Branch Obs. in England, 1 in MPEC 2018-T129 -- 155140
C23Olmen Obs. in Belgium, 1 in MPEC 2018-T129 -- 144332
557Ondrejov Obs. in the Czech Republic, 1 in MPEC 2018-T129 -- 155140
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2018-T129 -- 2018 PE22
I41Palomar Transient Factory (PTF) in southern California, 3 in MPEC 2018-T129 -- 2018 TS1, 523631, 438429
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2018-T135 -- 2013 SO20
F52Pan-STARRS 2 (PS2) in Hawaii, 3 in MPECs 2018-T129, 2018-T131 & 2018-T135 -- 2018 TB4, 2013 SO20, 155140
K63Pascoli Obs. in Italy, 1 in MPEC 2018-T129 -- 6456
C95SATINO-1 in France, 1 in MPEC 2018-T129 -- 139345
204Schiaparelli Obs. in Italy, 1 in MPEC 2018-T130 -- 2015 TB145
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-T129 -- 2018 TQ2
291Spacewatch 1.8m telescope in Arizona, 18 in MPECs 2018-T129 & 2018-T131 -- 2018 TZ1, 2018 TY2, 2018 TY, 2018 TT, 2018 TS2, 2018 TS, 2018 TR, 2018 TB4, 2018 TB2, 2018 SF3, 2018 SB3, 2018 RY7, 2018 RW27, 2018 RT3, 2018 RO2, 2018 RC1, 2017 SL16, 2015 HR11
C36Starry Wanderer Obs. in Belarus, 3 in MPEC 2018-T129 -- 3691, 3200, 1865
I52Steward Obs. Mt. Lemmon Station in Arizona, 38 in MPECs 2018-T129, 2018-T132 & 2018-T134 -- 2018 TZ1, 2018 TY2, 2018 TY1, 2018 TY, 2018 TX1, 2018 TW, 2018 TV1, 2018 TT1, 2018 TS1, 2018 TS, 2018 TR1, 2018 TR, 2018 TQ2, 2018 TQ1, 2018 TP1, 2018 TP, 2018 TO1, 2018 TL2, 2018 TF3, 2018 TE4, 2018 TE3, 2018 TD2, 2018 TC4, 2018 TC3, 2018 TC2, 2018 TC, 2018 TB, 2018 TA3, 2018 SZ2, 2018 SX2, 2018 SU3, 2018 SQ2, 2018 SL3, 2018 SK3, 2018 SK1, 2018 RR8, 2018 RJ7, 2018 FJ4
A16Tentlingen Obs. in Switzerland, 2 in MPEC 2018-T129 -- 418929, 18109
Z52The Studios Obs., 3 in MPEC 2018-T129 -- 18109, 13553, 3552
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2018-T129 -- 2018 SZ2, 2008 TY3
L01Visnjan Obs., 3 in MPECs 2018-T133, 2018-T134 & 2018-T135 -- 2018 TE4, 2018 TD4, 2013 SO20
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 October '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2319 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 is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few 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 Sentry15302026-2117277.945779e-07-3.84-4.480JPL: Computed at 07:39 today Pacific time based on 28 observations spanning 3.8880 days (2018-Oct-06.3505 to 2018-Oct-10.23852). Diameter approximately 0.302 km. from weighted mean H=20.27.
NEODyS15302022-2118943.0e-07-3.61-3.85-NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2018-10-06.351 to 2018-10-09.011."
2018 TY2JPL Sentry15302046-2093131.639381e-07-3.42-3.970JPL: Computed at 07:40 today Pacific time based on 32 observations spanning 4.9763 days (2018-Oct-05.36608 to 2018-Oct-10.34236). Diameter approximately 0.534 km. from weighted mean H=19.02.
NEODyS15302022-2113436.16e-07-2.79-3.330NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2018-10-05.367 to 2018-10-09.026."
2018 TS2JPL Sentry1530R E M O V E DJPL: Risk listing removed at 1438 UTC today
2018 TB2JPL Sentry15302095-209516.329e-08-8.27-8.270JPL: Computed at 07:33 today Pacific time based on 24 observations spanning 6.9896 days (2018-Oct-03.397251 to 2018-Oct-10.38685). Diameter approximately 0.014 km. from weighted mean H=26.96.
NEODyS1530209517.01e-08-8.19-8.190NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2018-10-03.398 to 2018-10-08.463."
2018 TRJPL Sentry15302103-2116103.4825e-06-6.05-6.610JPL: Computed at 07:33 today Pacific time based on 48 observations spanning 7.9195 days (2018-Oct-02.30976 to 2018-Oct-10.22931). Diameter approximately 0.029 km. from weighted mean H=25.35.
NEODyS15302089-2117354.35e-06-5.97-6.680NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2018-10-02.311 to 2018-10-09.202."
2018 TBJPL Sentry15302095-210326.7996e-07-6.42-6.480JPL: Computed at 07:20 today Pacific time based on 138 observations spanning 7.8627 days (2018-Oct-02.42196 to 2018-Oct-10.28463). Diameter approximately 0.036 km. from weighted mean H=24.87.
NEODyS15302095-210321.13e-06-6.22-6.250NEODyS: "Based on 140 optical observations (of which 1 are rejected as outliers) from 2018-10-02.423 to 2018-10-08.524."
2018 SN3JPL Sentry16002033-2118990.0002344855328-5.81-5.990JPL: Computed at 08:45 today Pacific time based on 8 observations spanning 1.0232 days (2018-Sep-18.412141 to 2018-Sep-19.435354). Diameter approximately 0.004 km. from weighted mean H=29.85.
2010 MA113NEODyS1530211811.34e-10-6.81-6.81-NEODyS: "Based on 23 optical observations (of which 1 are rejected as outliers) from 2010-06-24.806 to 2010-06-26.989."

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 10 October '18

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

2200Grabbed MPEC 2018-T135 - 2013 SO20 - see above
1911Generated Traffic Report
1600Noted that JPL Sentry has updated its 2018 SN3 risk assessment - see above
1530Noted that NEODyS has updated its 2010 MA113 risk assessment - 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 JPL Sentry has updated its 2018 TB2 risk assessment - see above
Noted that NEODyS has updated its 2018 TB2 risk assessment - see above
Noted that JPL Sentry has updated its 2018 TF3 risk assessment - see above
Noted that NEODyS has posted 2018 TF3 as an impact risk - 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 JPL Sentry has removed 2018 TS2 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 TY2 risk assessment - see above
Noted that NEODyS has posted 2018 TY2 as an impact risk - see above
Grabbed MPEC 2018-T129 - Daily Orbit Update - see above
Grabbed MPEC 2018-T130 - 2015 TB145 - see above
Grabbed MPEC 2018-T131 - 2018 TB4 - see above
Grabbed MPEC 2018-T132 - 2018 TC4 - see above
Grabbed MPEC 2018-T133 - 2018 TD4 - see above
Grabbed MPEC 2018-T134 - 2018 TE4 - see above