Contents  on 20 October '17

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 20 October '17

Eighteen objects reported inside ten LD

There are eighteen transient natural objects known to be less than ten lunar distances (LD) from our home world today. Nearest is risk-listed intruder 2017 TD6, which moves away from 0.66 to 2.52 LD while brushing past the Moon at 0.29 LD at 0704 UTC.

Earth passage I D ~Size Distance Today  Notes
0.26 LD Oct. 162017 TH5 8 m  8.68 to 11.32 LD intruder. exits ten LD
0.50 LD yesterday2017 TD6 12 m  0.66 to 2.52 LD intruder today, Moon closest at 0.29 LD
at 0704 UTC, exits Earth SOI, risk - DOU
1.19 LD Oct. 172017 UA 7 m  4.37 to 6.09 LD
1.34 LD Oct. 172017 TE5 22 m  6.34 to 8.74 LD
1.97 LD Oct. 162017 UU1 14 m  4.28 to 5.44 LD
2.76 LD yesterday2017 UJ 26 m  3.39 to 5.42 LD DOU
3.08 LD Oct. 172017 TW5 13 m  8.20 to 11.51 LD exits ten LD, risk
3.37 LD Oct. 222017 TV5 14 m  4.63 from 6.52 LD DOU
4.17 LD Oct. 152017 TK4 10 m  5.64 to 6.30 LD
4.27 LD today2017 UG 11 m  4.27 LD Earth closest at 1004 UTC - DOU
4.56 LD Oct. 182017 TX5 22 m  5.47 to 7.00 LD DOU
4.80 LD tomorrow2017 TG4 49 m  5.07 from 6.37 LD DOU
4.94 LD tomorrow2017 UH1 21 m  5.16 from 8.07 LD
5.50 LD Oct. 222017 TQ5 11 m  5.88 from 6.47 LD
5.77 LD Oct. 22171576 1999 VP11 645 m  9.04 from 13.07 LD enters ten LD
6.64 LD yesterday2017 TA6 16 m  6.64 to 6.73 LD risk - DOU
6.95 LD tomorrow2017 UM1 26 m  7.52 from 9.70 LD
7.46 LD Oct. 222017 US 23 m  7.66 from 7.92 LD risk - DOU
Approaching
8.66 LD Nov. 17444584 2006 UK 309 m  < 10 LD Nov. 16 - DOU

This report was generated at 2242 UTC with today's DOU MPEC posting observation of 25 objects, including nine active in the above traffic table, astrometry for 2017 SR16 from October 1st, and follow-up for fourteen departed objects: 2017 UE, 2017 UD, 2017 TJ6, 2017 TZ5, 2017 TY5, 2017 TU5, 2017 TM4, 2017 TY3, 2017 TU3, 2017 TS1, 2017 TE1, 2017 RS2, and risk-listed objects 2017 TT3 and intruder 2017 UF, plus distant 2003 UV11.



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 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 20 October '17

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 58 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 20 October '17

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 41 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 20 Oct. '17 >>  MPEC 2017-U151 - "12:06 UT" - Daily Orbit Update


MPEC 2017-U150 - "02:37 UT" - 2014 JK25


MPEC 2017-U149 - "02:33 UT" - 2016 VU2


MPEC 2017-U148 - "01:41 UT" - 2013 UF18


MPEC 2017-U147 - "01:39 UT" - 2013 UE18


MPEC 2017-U146 - "01:36 UT" - 2013 UD18


MPEC 2017-U145 - "01:34 UT" - 2013 UC18


MPEC 2017-U144 - "01:32 UT" - 2013 UB18


MPEC 2017-U143 - "01:29 UT" - 2013 UA18


MPEC 2017-U142 - "01:27 UT" - 2013 UZ17


MPEC 2017-U141 - "01:24 UT" - 2013 UY17


MPEC 2017-U140 - "01:22 UT" - 2013 UX17


MPEC 2017-U139 - "01:20 UT" - 2013 UW17


MPEC 2017-U138 - "01:17 UT" - 2013 UV17


MPEC 2017-U137 - "01:15 UT" - 2013 UU17


MPEC 2017-U136 - "01:13 UT" - 2013 UT17


MPEC 2017-U135 - "01:11 UT" - 2013 US17


MPEC 2017-U134 - "01:08 UT" - 2013 UR17


MPEC 2017-U133 - "01:06 UT" - 2013 UQ17


MPEC 2017-U132 - "01:04 UT" - 2013 UP17


MPEC 2017-U131 - "01:02 UT" - 2013 UO17


MPEC 2017-U130 - "00:59 UT" - 2013 UN17


MPEC 2017-U129 - "00:56 UT" - 2013 UM17


MPEC 2017-U128 - "00:54 UT" - 2013 UL17


MPEC 2017-U127 - "00:51 UT" - 2013 UK17


MPEC 2017-U126 - "00:49 UT" - 2013 UJ17


MPEC 2017-U125 - "00:47 UT" - 2013 UH17


MPEC 2017-U124 - "00:44 UT" - 2013 UG17


MPEC 2017-U123 - "00:42 UT" - 2013 UF17


MPEC 2017-U122 - "00:39 UT" - 2013 UE17


MPEC 2017-U121 - "00:37 UT" - 2013 UD17


MPEC 2017-U120 - "00:35 UT" - 2013 UC17


MPEC 2017-U119 - "00:32 UT" - 2013 UB17


MPEC 2017-U118 - "00:30 UT" - 2013 UA17


MPEC 2017-U117 - "00:27 UT" - 2013 UZ16


MPEC 2017-U116 - "00:25 UT" - 2013 UY16


MPEC 2017-U115 - "00:23 UT" - 2013 UX16


MPEC 2017-U114 - "00:20 UT" - 2013 UW16


MPEC 2017-U113 - "00:18 UT" - 2013 SG101


MPEC 2017-U112 - "00:16 UT" - 2013 SF101


MPEC 2017-U111 - "00:14 UT" - 2013 SE101

Observers  on 20 October '17

A total of 26 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 22 in MPEC 2017-U151 -- 2017 UF, 2017 TY3, 2017 TM4, 2017 TE1, 2017 SW14, 2017 SV17, 2017 SR16, 2017 SO16, 2017 SN2, 2017 SN17, 2017 SN16, 2017 SG12, 2017 RV1, 2017 RS2, 2017 RM15, 2017 RL16, 2017 RC15, 2017 QX35, 2017 PT25, 2017 HH, 2014 MY26, 2007 TQ24
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2017-U151 -- 1999 AF4
T08ATLAS Mauna Loa in Hawaii, 24 in MPEC 2017-U151 -- 2017 TK6, 2017 TD6, 2017 QL18, 2008 MH1, 2007 DM41, 2003 UV11, 85839, 503293, 498548, 498143, 497176, 496817, 496018, 495511, 444584, 338176, 159399, 143404, 142040, 137062, 11500, 8037, 2212, 1865
160Castelmartini Obs. in Italy, 13 in MPEC 2017-U151 -- 2017 TR1, 90075, 68950, 498548, 497176, 457768, 338292, 333908, 265962, 142040, 11500, 100926, 1980
703Catalina Sky Survey (CSS) in Arizona, 11 in MPEC 2017-U151 -- 2017 US, 2017 TV5, 2017 QL18, 2003 UV11, 497176, 444584, 159399, 143404, 11500, 3361, 2212
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2017-U151 -- 2017 QW34
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 3 in MPECs 2017-U149, 2017-U150 & 2017-U151 -- 2017 TT3, 2016 VU2, 2014 JK25
734Farpoint Obs. in Kansas, 1 in MPEC 2017-U151 -- 2017 NL6
K83Forti Obs., 1 in MPEC 2017-U151 -- 65679
K88GINOP-KHK in Hungary, 1 in MPEC 2017-U151 -- 20086
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-U151 -- 2017 TD6
W19Kalamazoo Obs. in Michigan, 2 in MPEC 2017-U151 -- 65679, 190208
585Kiev Comet Station in Ukraine, 1 in MPEC 2017-U151 -- 2017 UO
246KLENOT in the Czech Republic, 18 in MPEC 2017-U151 -- 2017 TZ4, 2017 TV5, 2017 TV4, 2017 TR1, 2017 TN6, 2017 TM2, 2017 TL4, 2017 TK6, 2017 TJ4, 2017 TG4, 2017 SY20, 2017 SS19, 2017 SS17, 2017 SN14, 2017 SL2, 2017 RR15, 2017 QQ32, 2004 SS
C94MASTER-II Tunka in Russia, 3 in MPEC 2017-U151 -- 2003 UV11, 495511, 8037
568@Jean-Marc Petit on Mauna Kea in Hawaii, 38 in MPECs 2017-U111, 2017-U112, 2017-U113, 2017-U114, 2017-U115, 2017-U116, 2017-U117, 2017-U118, 2017-U119, 2017-U120, 2017-U121, 2017-U122, 2017-U123, 2017-U124, 2017-U125, 2017-U126, 2017-U127, 2017-U128, 2017-U129, 2017-U130, 2017-U131, 2017-U132, 2017-U133, 2017-U134, 2017-U135, 2017-U136, 2017-U137, 2017-U138, 2017-U139, 2017-U140, 2017-U141, 2017-U142, 2017-U143, 2017-U144, 2017-U145, 2017-U146, 2017-U147 & 2017-U148 -- 2013 UZ17, 2013 UZ16, 2013 UY17, 2013 UY16, 2013 UX17, 2013 UX16, 2013 UW17, 2013 UW16, 2013 UV17, 2013 UU17, 2013 UT17, 2013 US17, 2013 UR17, 2013 UQ17, 2013 UP17, 2013 UO17, 2013 UN17, 2013 UM17, 2013 UL17, 2013 UK17, 2013 UJ17, 2013 UH17, 2013 UG17, 2013 UF18, 2013 UF17, 2013 UE18, 2013 UE17, 2013 UD18, 2013 UD17, 2013 UC18, 2013 UC17, 2013 UB18, 2013 UB17, 2013 UA18, 2013 UA17, 2013 SG101, 2013 SF101, 2013 SE101
474Mt. John Obs. in New Zealand, 11 in MPEC 2017-U151 -- 2017 TQ3, 2017 SV14, 2017 ST20, 2017 ST16, 2017 ST11, 2017 SS32, 2017 SP14, 2017 SN17, 2017 SC20, 2017 SB14, 2016 UA42
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPEC 2017-U151 -- 2017 ST20, 2017 QQ32, 2017 OH68, 2017 JU2, 2011 EB7, 427499, 378124, 15817
F51Pan-STARRS 1 (PS1) in Hawaii, 25 in MPEC 2017-U151 -- 2017 TN4, 2017 SY20, 2017 QQ32, 2017 QL35, 2017 KS31, 2005 UN157, 2003 SJ154, 1998 WZ1, 86819, 499307, 498068, 495511, 30825, 23548, 220839, 20429, 18736, 162679, 152667, 143404, 142464, 141354, 138911, 8201, 8037
W98Polonia Obs. in Chile, 1 in MPEC 2017-U151 -- 3361
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2017-U151 -- 2017 QL33, 2017 FJ90, 138911
291Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2017-U151 -- 2017 TS3, 2017 SL17, 2017 RO2, 2017 QL33, 2014 JN57
I52Steward Obs. Mt. Lemmon Station in Arizona, 30 in MPEC 2017-U151 -- 2017 UT, 2017 UG, 2017 UE, 2017 UD, 2017 TZ5, 2017 TZ4, 2017 TV5, 2017 TV4, 2017 TU5, 2017 TS1, 2017 TQ4, 2017 TP5, 2017 TO5, 2017 TN6, 2017 TN4, 2017 TM6, 2017 TL6, 2017 TL4, 2017 TK6, 2017 TJ6, 2017 TJ1, 2017 TG6, 2017 TG4, 2017 TD4, 2017 TC4, 2017 TB5, 2017 ST20, 2017 SP19, 2017 SN16, 2017 RY15
926Tenagra II Obs. in Arizona, 12 in MPEC 2017-U151 -- 2017 UT, 2017 UJ, 2017 UG, 2017 TZ5, 2017 TY5, 2017 TX5, 2017 TV5, 2017 TU3, 2017 TO2, 2017 TA6, 2017 HH49, 2016 VU2
A16Tentlingen Obs. in Switzerland, 2 in MPEC 2017-U151 -- 457768, 142040
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-U151 -- 2017 HT2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 October '17

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
2017 UL1NEODyS1456211011.68e-08-7.87-7.870NEODyS: "Based on 18 optical observations (of which 1 are rejected as outliers) from 2017-10-16.390 to 2017-10-19.491."
2017 UK1NEODyS14562066-2117334.06e-04-4.46-4.470NEODyS: "Based on 17 optical observations (of which 4 are rejected as outliers) from 2017-10-16.366 to 2017-10-19.458."
2017 USJPL Sentry17012070-2117240.00031535394-4.32-4.710JPL: Computed at 09:47 today Pacific time based on 74 observations spanning 3.0811 days (2017-Oct-16.34512 to 2017-Oct-19.42621). Diameter approximately 0.023 km. from weighted mean H=25.84.
2017 UFJPL Sentry15422066-208221.8096e-07-7.87-8.100JPL: Computed at 08:29 today Pacific time based on 26 observations spanning 2.9981 days (2017-Oct-16.26082 to 2017-Oct-19.258919). Diameter approximately 0.009 km. from weighted mean H=27.88.
NEODyS14562050-206626.94e-08-8.19-8.20NEODyS: "Based on 23 optical observations (of which 6 are rejected as outliers) from 2017-10-16.262 to 2017-10-18.913."
2017 TD6JPL Sentry16052085-208517.522e-09-9.41-9.410JPL: Computed at 08:45 today Pacific time based on 79 observations spanning 7.1419 days (2017-Oct-11.41171 to 2017-Oct-18.553565). Diameter approximately 0.012 km. from weighted mean H=27.22.
NEODyS1456208113.8e-09-9.66-9.660NEODyS: "Based on 71 optical observations (of which 1 are rejected as outliers) from 2017-10-11.413 to 2017-10-18.554."
2017 TA6JPL Sentry16052049-2116430.0001507362902-5.10-5.380JPL: Computed at 08:51 today Pacific time based on 34 observations spanning 4.0724 days (2017-Oct-15.43676 to 2017-Oct-19.50912). Diameter approximately 0.016 km. from weighted mean H=26.67.
NEODyS14562052-21171009.39e-04-4.26-4.510NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2017-10-15.438 to 2017-10-16.448."
2017 TW5NEODyS14562064-211181.7e-07-7.67-7.940NEODyS: "Based on 23 optical observations (of which 4 are rejected as outliers) from 2017-10-15.317 to 2017-10-17.093."
2017 TT3JPL Sentry1605R E M O V E DJPL: Risk listing removed at 1543 UTC today
NEODyS1456211319.31e-10-9.78-9.780NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2017-10-10.438 to 2017-10-17.945."
2017 TP2NEODyS1456209021.83e-09-8.68-8.930NEODyS: "Based on 23 optical observations (of which 3 are rejected as outliers) from 2017-10-11.178 to 2017-10-17.846."
2017 SA20NEODyS14562027-211714527.44e-03-3.99-4.040NEODyS: "Based on 24 optical observations (of which 3 are rejected as outliers) from 2017-09-24.415 to 2017-09-30.223."
2017 SE19NEODyS1456R E M O V E D-
2017 RV2NEODyS14562071-2117425.99e-05-5.17-5.440NEODyS: "Based on 133 optical observations (of which 10 are rejected as outliers) from 2017-09-14.436 to 2017-10-17.393."
2017 PL26NEODyS1456R E M O V E D-
2017 FR102NEODyS1456211616.05e-09-8.41-8.410NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2017-03-27.557 to 2017-04-28.519."
2016 WJ1NEODyS14562104-2115108.02e-07-4.51-5.310NEODyS: "Based on 401 optical observations (of which 7 are rejected as outliers) from 2003-07-04.606 to 2017-07-31.349."

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 20 October '17

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

2242Generated Traffic Report
1701Noted that JPL Sentry has updated its 2017 US risk assessment - see above
1605Noted that JPL Sentry has updated its 2017 TA6 risk assessment - see above
Noted that JPL Sentry has updated its 2017 TD6 risk assessment - see above
Noted that JPL Sentry has removed 2017 TT3 as an impact risk - see above
1542Noted that JPL Sentry has updated its 2017 UF risk assessment - see above
1456Noted that NEODyS has updated its 2016 WJ1 risk assessment - see above
Noted that NEODyS has removed 2017 PL26 as an impact risk - see above
Noted that NEODyS has removed 2017 SE19 as an impact risk - see above
Noted that NEODyS has posted 2017 TA6 as an impact risk - see above
Noted that NEODyS has posted 2017 TD6 as an impact risk - see above
Noted that NEODyS has posted 2017 UK1 as an impact risk - see above
Noted that NEODyS has posted 2017 UL1 as an impact risk - see above
Grabbed MPEC 2017-U151 - Daily Orbit Update - see above
0239Grabbed MPEC 2017-U149 - 2016 VU2 - see above
Grabbed MPEC 2017-U150 - 2014 JK25 - see above
0216Grabbed MPEC 2017-U144 - 2013 UB18 - see above
Grabbed MPEC 2017-U145 - 2013 UC18 - see above
Grabbed MPEC 2017-U146 - 2013 UD18 - see above
Grabbed MPEC 2017-U147 - 2013 UE18 - see above
Grabbed MPEC 2017-U148 - 2013 UF18 - see above
0131Grabbed MPEC 2017-U115 - 2013 UX16 - see above
Grabbed MPEC 2017-U116 - 2013 UY16 - see above
Grabbed MPEC 2017-U117 - 2013 UZ16 - see above
Grabbed MPEC 2017-U118 - 2013 UA17 - see above
Grabbed MPEC 2017-U119 - 2013 UB17 - see above
Grabbed MPEC 2017-U120 - 2013 UC17 - see above
Grabbed MPEC 2017-U121 - 2013 UD17 - see above
Grabbed MPEC 2017-U122 - 2013 UE17 - see above
Grabbed MPEC 2017-U123 - 2013 UF17 - see above
Grabbed MPEC 2017-U124 - 2013 UG17 - see above
Grabbed MPEC 2017-U125 - 2013 UH17 - see above
Grabbed MPEC 2017-U126 - 2013 UJ17 - see above
Grabbed MPEC 2017-U127 - 2013 UK17 - see above
Grabbed MPEC 2017-U128 - 2013 UL17 - see above
Grabbed MPEC 2017-U129 - 2013 UM17 - see above
Grabbed MPEC 2017-U130 - 2013 UN17 - see above
Grabbed MPEC 2017-U131 - 2013 UO17 - see above
Grabbed MPEC 2017-U132 - 2013 UP17 - see above
Grabbed MPEC 2017-U133 - 2013 UQ17 - see above
Grabbed MPEC 2017-U134 - 2013 UR17 - see above
Grabbed MPEC 2017-U135 - 2013 US17 - see above
Grabbed MPEC 2017-U136 - 2013 UT17 - see above
Grabbed MPEC 2017-U137 - 2013 UU17 - see above
Grabbed MPEC 2017-U138 - 2013 UV17 - see above
Grabbed MPEC 2017-U139 - 2013 UW17 - see above
Grabbed MPEC 2017-U140 - 2013 UX17 - see above
Grabbed MPEC 2017-U141 - 2013 UY17 - see above
Grabbed MPEC 2017-U142 - 2013 UZ17 - see above
Grabbed MPEC 2017-U143 - 2013 UA18 - see above
0022Grabbed MPEC 2017-U111 - 2013 SE101 - see above
Grabbed MPEC 2017-U112 - 2013 SF101 - see above
Grabbed MPEC 2017-U113 - 2013 SG101 - see above
Grabbed MPEC 2017-U114 - 2013 UW16 - see above