Contents  on 5 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 5 October '18

Nine objects reported inside ten LD

There are nine visitors reported within ten lunar distances (LD) of Earth today. The nearest is inside our planet's sphere of gravitaional influence and comes its closest on this passage. Newly announced 2018 TU reaches 2.03 LD at 2203 UTC.

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  6.62 to 7.28 LD Sept. 10 - Oct. 10 intruder, NHATS target, risk
0.79 LD Sept. 30 2018 TC 15 m  5.40 to 6.66 LD Sept. 23 - Oct. 8 intruder, NHATS target - DOU
2.03 LD today 2018 TU 11 m  2.03 LD Oct. 2 - 9 NEW, Earth closest at 2203 UTC - MPEC
4.06 LD Sept. 24 2018 RQ1 51 m  7.95 to 8.54 LD Sept. 11 - Oct. 8 NHATS target, risk
4.83 LD Oct. 2 2018 TB 35 m  7.17 to 8.68 LD Sept. 27 - tomorrow risk - DOU
5.39 LD Oct. 2 2018 SD3 9 m  6.89 to 8.08 LD Sept. 27 - Oct. 7 NHATS target
6.18 LD yesterday 2018 SC3 20 m  6.27 to 6.81 LD Sept. 30 - Oct. 8 DOU
6.36 LD Sept. 30 2018 SO2 23 m  9.87 to 11.22 LD Sept. 26 - today NHATS target, exits ten LD
6.69 LD Oct. 8 2018 SG3 13 m  7.23 from 7.83 LD Oct. 2 - 13 NHATS target
Approaching Traffic - sorted by 10-LD bubble entry date
3.1   LD Oct. 17* 2014 US7 18 m  22.9 from 24.9 LD Oct. 12 - 22 EPU +/- 3.10 hours*, NHATS target
9.0   LD Oct. 15* 2018 SL3 33 m  30.4 from 33.4 LD Oct. 14 - 17 EPU +/- 58 mins.*
8.7   LD Oct. 18* 2016 GC221 37 m  41.8 from 45.0 LD Oct. 17 - 20 EPU +/- 6.07 hours*
7.51 LD Oct. 29 475534 2006 TS7 195 m  102.27 from 97.95 LD Oct. 27 - 31
* EPU = Earth passage uncertainty

This report was generated at 2120 UTC with the discoveries of passing 2018 TU (MPEC) and already departed 2018 TR (MPEC), which flew by at 8.03 LD on September 28th. Today's DOU MPEC has follow-up for three objects in the active traffic table above and for three departed objects: 2018 SE2, 2018 PO22, and risk-listed 2018 RP5.



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. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 5 October '18

The MPC's NEO Confirmation Page has 83 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 83 objects listed. Of these, 46 were "one nighters." So far The Tracking News has counted a total of 105 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 5 October '18

Minor Planet Electronic Circulars

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


MPEC 2018-T61 - "14:38 UT" - 2018 TU


MPEC 2018-T60 - "14:33 UT" - 2018 TT


MPEC 2018-T59 - "14:28 UT" - 2018 TS


MPEC 2018-T58 - "14:23 UT" - 2018 TR


MPEC 2018-T57 - "14:17 UT" - 2018 TQ


MPEC 2018-T56 - "14:09 UT" - 2018 TP


MPEC 2018-T55 - "14:01 UT" - 2018 SU3


<< DOU on 5 Oct. '18 >>  MPEC 2018-T54 - "12:05 UT" - Daily Orbit Update


MPEC 2018-T53 - "03:14 UT" - 2008 UE1


MPEC 2018-T52 - "01:54 UT" - 2006 FV33

Observers  on 5 October '18

A total of 43 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 13 in MPECs 2018-T54, 2018-T55, 2018-T57, 2018-T60 & 2018-T61 -- 2018 TU, 2018 TT, 2018 TQ, 2018 SU3, 2018 SM2, 2018 SB2, 2018 RC8, 2018 OK, 2018 LZ5, 2015 RE36, 2014 US, 2011 RF, 326946
T05ATLAS Haleakala in Hawaii, 27 in MPECs 2018-T54, 2018-T56, 2018-T58 & 2018-T61 -- 2018 TU, 2018 TR, 2018 TP, 2018 SC3, 2018 RV5, 2018 RS1, 2018 NB, 2012 TT5, 2011 UA, 65733, 53789, 523788, 523631, 518635, 481542, 457260, 455594, 443923, 438429, 20790, 155334, 153591, 12711, 6456, 5143, 3691, 1865
T08ATLAS Mauna Loa in Hawaii, 13 in MPECs 2018-T54 & 2018-T58 -- 2018 TR, 2005 RB, 54789, 523670, 358744, 333889, 25916, 152952, 140333, 5751, 4596, 4401, 1627
C77Bernezzo Obs. in Italy, 1 in MPEC 2018-T56 -- 2018 TP
R58Beverly-Begg Obs., 1 in MPEC 2018-T56 -- 2018 TP
160Castelmartini Obs. in Italy, 1 in MPEC 2018-T56 -- 2018 TP
703Catalina Sky Survey in Arizona, 1 in MPEC 2018-T56 -- 2018 TP
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPECs 2018-T54, 2018-T57 & 2018-T58 -- 2018 TR, 2018 TQ, 2018 SN2, 2018 PU21, 2018 PP10, 2018 PO22, 2018 ML8
850Cordell-Lorenz Obs. in Tennessee, 2 in MPECs 2018-T54 & 2018-T56 -- 2018 TP, 418929
K89Digital Stargate Obs., 2 in MPEC 2018-T54 -- 88263, 433
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2018-T56 & 2018-T61 -- 2018 TU, 2018 TP
K88GINOP-KHK in Hungary, 5 in MPECs 2018-T54, 2018-T56 & 2018-T61 -- 2018 TU, 2018 TP, 2006 FV33, 397847, 155334
J95Great Shefford Obs. in England, 1 in MPEC 2018-T61 -- 2018 TU
A17Guidestar Obs. in Germany, 2 in MPECs 2018-T54 & 2018-T56 -- 2018 TP, 2018 SQ2
H15ISON New Mexico Obs. in New Mexico, 3 in MPEC 2018-T54 -- 20790, 5797, 5143
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-T56 -- 2018 TP
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 4 in MPEC 2018-T54 -- 2018 RY7, 2018 RP5, 2018 QT1, 2018 PH9
K93LCO Sutherland C in South Africa, 1 in MPEC 2018-T57 -- 2018 TQ
K38M57 Obs. in Italy, 1 in MPEC 2018-T56 -- 2018 TP
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2018-T55 -- 2018 SU3
K32Maritime Alps Obs. in Italy, 1 in MPEC 2018-T56 -- 2018 TP
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2018-T54 -- 9856
711McDonald Obs. in Texas, 6 in MPECs 2018-T54, 2018-T57, 2018-T58, 2018-T59 & 2018-T60 -- 2018 TT, 2018 TS, 2018 TR, 2018 TQ, 2008 UE1, 2006 FV33
B67Mirasteilas Obs. in Switzerland, 3 in MPEC 2018-T54 -- 2018 RS1, 2018 KV, 2017 SN14
474Mt. John Obs. in New Zealand, 1 in MPEC 2018-T59 -- 2018 TS
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2018-T55 & 2018-T56 -- 2018 TP, 2018 SU3
K74Muensterschwarzach Obs. in Germany, 4 in MPECs 2018-T54 & 2018-T56 -- 2018 TP, 418929, 18109, 17274
C23Olmen Obs. in Belgium, 1 in MPEC 2018-T56 -- 2018 TP
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2018-T52 -- 2006 FV33
F52Pan-STARRS 2 (PS2) in Hawaii, 30 in MPECs 2018-T53, 2018-T54, 2018-T57, 2018-T59, 2018-T60 & 2018-T61 -- 2018 TU, 2018 TT, 2018 TS, 2018 TQ, 2018 RX7, 2017 SN16, 2008 UE1, 2006 FV33, 2005 FG, 2001 SC170, 1999 RV2, 87311, 85774, 52768, 523788, 523636, 516976, 418929, 303174, 253841, 225312, 21277, 18109, 17274, 154300, 153591, 136773, 13553, 11398, 4183
K63Pascoli Obs. in Italy, 5 in MPECs 2018-T54, 2018-T56 & 2018-T61 -- 2018 TU, 2018 TP, 418929, 17274, 163818
L04ROASTERR-1 in Romania, 1 in MPEC 2018-T56 -- 2018 TP
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-T56 -- 2018 TP
C95SATINO-1 in France, 1 in MPEC 2018-T54 -- 86324
204Schiaparelli Obs. in Italy, 4 in MPECs 2018-T55, 2018-T56, 2018-T58 & 2018-T61 -- 2018 TU, 2018 TR, 2018 TP, 2018 SU3
587Sormano Obs. in Italy, 3 in MPECs 2018-T56, 2018-T58 & 2018-T61 -- 2018 TU, 2018 TR, 2018 TP
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2018-T54 & 2018-T57 -- 2018 TQ, 2018 SK3
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2018-T55 & 2018-T60 -- 2018 TT, 2018 SU3
W34Squirrel Valley Obs. in North Carolina, 2 in MPECs 2018-T54 & 2018-T56 -- 2018 TP, 523595
C36Starry Wanderer Obs. in Belarus, 1 in MPEC 2018-T54 -- 523788
I52Steward Obs. Mt. Lemmon Station in Arizona, 13 in MPECs 2018-T54, 2018-T55, 2018-T56, 2018-T57, 2018-T58, 2018-T59 & 2018-T60 -- 2018 TT, 2018 TS, 2018 TR, 2018 TQ, 2018 TP, 2018 TC, 2018 TB, 2018 SZ2, 2018 SU3, 2018 SE3, 2018 SE2, 2018 SB3, 2006 FV33
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 3 in MPEC 2018-T54 -- 2018 SK3, 2018 RP5, 2018 GL2
L01Visnjan Obs., 6 in MPECs 2018-T55, 2018-T56, 2018-T57, 2018-T59, 2018-T60 & 2018-T61 -- 2018 TU, 2018 TT, 2018 TS, 2018 TQ, 2018 TP, 2018 SU3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 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 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 TRJPL Sentry16002093-2114124.044654e-06-5.89-6.400JPL: Computed at 08:37 today Pacific time based on 27 observations spanning 2.8601 days (2018-Oct-02.30976 to 2018-Oct-05.1699). Diameter approximately 0.031 km. from weighted mean H=25.19.
2018 TBJPL Sentry15302095-210326.9476e-07-6.43-6.470JPL: Computed at 07:08 today Pacific time based on 100 observations spanning 2.8186 days (2018-Oct-02.42196 to 2018-Oct-05.2406). Diameter approximately 0.035 km. from weighted mean H=24.92.
NEODyS15302095-210646.91e-07-6.44-6.530NEODyS: "Based on 97 optical observations (of which 1 are rejected as outliers) from 2018-10-02.423 to 2018-10-04.383."
2018 SK3JPL Sentry15302099-211425.481e-10-6.18-6.480JPL: Computed at 07:06 today Pacific time based on 32 observations spanning 4.9044 days (2018-Sep-30.3031 to 2018-Oct-05.20747). Diameter approximately 0.586 km. from weighted mean H=18.81.
2018 RP5NEODyS1530R E M O V E D-
2018 QSNEODyS15302084-211622.36e-06-6.46-6.520NEODyS: "Based on 77 optical observations (of which 0 are rejected as outliers) from 2018-08-18.481 to 2018-10-03.094."
2018 GL2NEODyS1530R 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 5 October '18

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

2120Generated Traffic Report
1600Noted that JPL Sentry has posted 2018 TR as an impact risk - see above
1530Noted that NEODyS has removed 2018 GL2 as an impact risk - see above
Noted that NEODyS has updated its 2018 QS risk assessment - see above
Noted that NEODyS has removed 2018 RP5 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 SK3 risk assessment - see above
Noted that JPL Sentry has updated its 2018 TB risk assessment - see above
Noted that NEODyS has posted 2018 TB as an impact risk - see above
Grabbed MPEC 2018-T54 - Daily Orbit Update - see above
Grabbed MPEC 2018-T55 - 2018 SU3 - see above
Grabbed MPEC 2018-T56 - 2018 TP - see above
Grabbed MPEC 2018-T57 - 2018 TQ - see above
Grabbed MPEC 2018-T58 - 2018 TR - see above
Grabbed MPEC 2018-T59 - 2018 TS - see above
Grabbed MPEC 2018-T60 - 2018 TT - see above
Grabbed MPEC 2018-T61 - 2018 TU - see above
0333Grabbed MPEC 2018-T52 - 2006 FV33 - see above
Grabbed MPEC 2018-T53 - 2008 UE1 - see above