Contents  on 12 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 12 October '17

Eight objects reported inside ten LD

There are eight visitors reported within ten lunar distances (LD) of our planet today. Nearest is risk-listed radar/NHATS target 2012 TC4, which began the day inside the Earth-Moon system, and went on to pass under the planet at 0.13 LD at 0541 UTC on the way to fly by the Moon at 0.72 LD at 1918 UTC, ending the day at 1.17 LD from Earth.

Earth passage I D ~Size Distance Today  Notes
0.13 LD today2012 TC4 15 m  0.13 LD intruder today, Earth closest at 0541 UTC, Moon closest 0.72
LD at 1918 UTC, radar/NHATS target, risk - DOU, links
1.14 LD Oct. 52017 TB 5 m  8.33 to 9.66 LD risk
2.52 LD tomorrow2017 TT1 13 m  2.54 from 3.71 LD DOU
5.21 LD tomorrow2017 TU1 20 m  5.35 from 6.29 LD risk - DOU
5.59 LD Oct. 142017 TV1 19 m  6.33 from 7.70 LD DOU
8.5   LD tomorrow2005 TE49 15 m  8.7 from 9.6 LD uncertainty +/- 10.1167 hours, NHATS target
8.93 LD yesterday2017 SB20 36 m  9.05 to 9.45 LD
8.96 LD Oct. 102017 SN21 21 m  9.24 to 9.80 LD
Approaching (sorted by 10-LD bubble entry date)
5.77 LD Oct. 22171576 1999 VP11 645 m  < 10 LD Oct. 20
8.66 LD Nov. 17444584 2006 UK 309 m  < 10 LD Nov. 16

This report was generated at 1744 UTC with first follow-up for 2017 TV1, 2017 TU1, and 2017 TT1 in today's DOU MPEC, along with continuing follow-up for 2012 TC4 and distant 2003 UV11, plus the recovery of distant NHATS target 436724 2011 UW158.



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 in 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 12 October '17

The MPC's NEO Confirmation Page has 87 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 87 objects listed. Of these, 28 were "one nighters." So far The Tracking News has counted a total of 112 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 '17

Minor Planet Electronic Circulars

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


MPEC 2017-T60 - "22:16 UT" - 2017 TN2


MPEC 2017-T59 - "22:12 UT" - 2017 TL2


MPEC 2017-T58 - "22:08 UT" - 2017 TP2


MPEC 2017-T57 - "21:58 UT" - 2017 TO2


MPEC 2017-T56 - "21:54 UT" - 2017 TM2


MPEC 2017-T55 - "21:50 UT" - 2017 TK2


MPEC 2017-T54 - "21:48 UT" - 2017 TJ2


MPEC 2017-T53 - "21:44 UT" - 2017 TH2


MPEC 2017-T52 - "21:40 UT" - 2017 TG2


MPEC 2017-T51 - "21:36 UT" - 2017 TF2


MPEC 2017-T50 - "21:34 UT" - 2017 TE2


<< DOU on 12 Oct. '17 >>  MPEC 2017-T49 - "12:04 UT" - Daily Orbit Update

Observers  on 12 October '17

A total of 54 observers appear in today's MPECs.

CodeObserver / observatory
C97Al-Fulaij Obs., 3 in MPEC 2017-T49 -- 500749, 498548, 3122
E23Arcadia Obs. in New South Wales, 1 in MPEC 2017-T54 -- 2017 TJ2
T05ATLAS Haleakala in Hawaii, 19 in MPECs 2017-T49 & 2017-T52 -- 2017 TG2, 2017 SO17, 2017 PS30, 2017 OD1, 2017 MV2, 2006 TU7, 2004 TD10, 495959, 371336, 303250, 242211, 16657, 162694, 162117, 154589, 154268, 11405, 7336, 5189
T08ATLAS Mauna Loa in Hawaii, 31 in MPECs 2017-T49, 2017-T50, 2017-T55 & 2017-T60 -- 2017 TN2, 2017 TK2, 2017 TE2, 2015 KN120, 2012 TC4, 2010 SA12, 96744, 96631, 90075, 85709, 65679, 55408, 53319, 496837, 496818, 496817, 496816, 441825, 416584, 411201, 265962, 21374, 190166, 15817, 143624, 142464, 141670, 137799, 11405, 5143, 3288
C77Bernezzo Obs. in Italy, 1 in MPEC 2017-T52 -- 2017 TG2
073Bucharest Obs. in Romania, 1 in MPEC 2017-T49 -- 2012 TC4
160Castelmartini Obs. in Italy, 10 in MPECs 2017-T49, 2017-T50, 2017-T52, 2017-T54, 2017-T55 & 2017-T60 -- 2017 TN2, 2017 TK2, 2017 TJ2, 2017 TG2, 2017 TE2, 2017 RV1, 2012 TC4, 68950, 250458, 142040
703Catalina Sky Survey (CSS) in Arizona, 42 in MPECs 2017-T49, 2017-T50, 2017-T52, 2017-T53, 2017-T54, 2017-T55, 2017-T59 & 2017-T60 -- 2017 TN2, 2017 TL2, 2017 TK2, 2017 TJ2, 2017 TH2, 2017 TG2, 2017 TE2, 2017 SO17, 2017 RK1, 2017 QQ32, 2017 QL18, 2017 PR25, 2017 OH68, 2017 FJ90, 2015 KN120, 2013 QH48, 2012 TC4, 2011 EB7, 2004 TD10, 2003 UV11, 85709, 66146, 53319, 496837, 496816, 416584, 411201, 408792, 355770, 23714, 21374, 192563, 190166, 162679, 162117, 15817, 138911, 137799, 137199, 11405, 7336, 2062
107Cavezzo Obs. in Italy, 3 in MPECs 2017-T52, 2017-T54 & 2017-T55 -- 2017 TK2, 2017 TJ2, 2017 TG2
A77Chante-Perdrix Obs. in France, 1 in MPEC 2017-T49 -- 2012 TC4
K87Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2017-T51 -- 2017 TF2
J27El Guijo Obs. in Spain, 6 in MPEC 2017-T49 -- 2014 YC15, 498548, 496005, 338292, 333888, 11500
151Eschenberg Obs. in Switzerland, 4 in MPECs 2017-T49 & 2017-T54 -- 2017 TJ2, 2017 RR15, 2017 LU, 2004 SS
K83Forti Obs., 3 in MPEC 2017-T49 -- 2014 YC15, 333888, 1865
K88GINOP-KHK in Hungary, 4 in MPECs 2017-T50, 2017-T52, 2017-T54 & 2017-T60 -- 2017 TN2, 2017 TJ2, 2017 TG2, 2017 TE2
J95Great Shefford Obs. in England, 9 in MPECs 2017-T49, 2017-T51, 2017-T52, 2017-T53, 2017-T54, 2017-T55 & 2017-T58 -- 2017 TV1, 2017 TT1, 2017 TP2, 2017 TK2, 2017 TJ2, 2017 TH2, 2017 TG2, 2017 TF2, 2012 TC4
G48Harlingten Research Obs. in New Mexico, 1 in MPEC 2017-T52 -- 2017 TG2
H15ISON New Mexico Obs. in New Mexico, 2 in MPEC 2017-T49 -- 2008 AX28, 143404
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2017-T54 & 2017-T60 -- 2017 TN2, 2017 TJ2
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2017-T49 -- 2012 TC4
W19Kalamazoo Obs. in Michigan, 1 in MPEC 2017-T49 -- 65679
585Kiev Comet Station in Ukraine, 1 in MPEC 2017-T52 -- 2017 TG2
K38M57 Obs. in Italy, 1 in MPEC 2017-T52 -- 2017 TG2
H01Magdalena Ridge Obs. (MRO) in New Mexico, 10 in MPECs 2017-T49, 2017-T50, 2017-T51, 2017-T52, 2017-T53, 2017-T54, 2017-T55, 2017-T57, 2017-T58 & 2017-T60 -- 2017 TP2, 2017 TO2, 2017 TN2, 2017 TK2, 2017 TJ2, 2017 TH2, 2017 TG2, 2017 TF2, 2017 TE2, 2012 TC4
W92MASTER OAFA Obs., 1 in MPEC 2017-T49 -- 65679
932McCarthy Obs. in Connecticut, 1 in MPEC 2017-T54 -- 2017 TJ2
108Montelupo Obs. in Italy, 5 in MPEC 2017-T49 -- 2017 FJ90, 2014 YC15, 2012 TC4, 2004 SS, 65679
900Moriyama Obs. in Japan, 1 in MPEC 2017-T52 -- 2017 TG2
474Mt. John Obs. in New Zealand, 4 in MPEC 2017-T49 -- 2017 TF1, 2017 SW20, 2017 SK17, 2017 SJ12
G96Mt. Lemmon Survey (MLS) in Arizona, 22 in MPECs 2017-T49, 2017-T51, 2017-T52, 2017-T57, 2017-T58 & 2017-T59 -- 2017 TP2, 2017 TO2, 2017 TL2, 2017 TG2, 2017 TF2, 2017 SN14, 2017 SM19, 2017 PS25, 2016 TE93, 2014 UR116, 2009 SP171, 2008 MH1, 2004 SS, 2004 QF1, 389694, 374851, 31221, 190208, 17182, 155140, 137078, 1864
K74Muensterschwarzach Obs. in Germany, 2 in MPEC 2017-T49 -- 2012 TC4, 496005
J15Muxagata Obs., 1 in MPEC 2017-T49 -- 2012 TC4
A13Naef Obs. in Switzerland, 1 in MPEC 2017-T49 -- 2012 TC4
C47Nonndorf Obs. in Austria, 1 in MPEC 2017-T49 -- 2012 TC4
J69North Obs. in England, 1 in MPEC 2017-T49 -- 2012 TC4
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2017-T49 -- 2012 TC4
F51Pan-STARRS 1 (PS1) in Hawaii, 24 in MPECs 2017-T49, 2017-T55, 2017-T56 & 2017-T59 -- 2017 TM2, 2017 TL2, 2017 TK2, 2017 SG14, 2017 RU, 2017 QT35, 2017 QL33, 2017 KR34, 2017 HS, 2017 FJ90, 2016 SG17, 2001 UQ163, 2001 HW7, 96744, 65679, 436724, 350536, 23714, 223456, 220839, 162581, 152770, 137799, 2201
K63Pascoli Obs. in Italy, 5 in MPECs 2017-T52, 2017-T54, 2017-T57, 2017-T58 & 2017-T60 -- 2017 TP2, 2017 TO2, 2017 TN2, 2017 TJ2, 2017 TG2
K19PASTIS Obs. in France, 1 in MPEC 2017-T49 -- 2012 TC4
122Pises Obs. in France, 1 in MPEC 2017-T49 -- 2017 SS19
K33San Defendente Obs. in Italy, 1 in MPEC 2017-T54 -- 2017 TJ2
H36Sandlot Obs. in Kansas, 6 in MPECs 2017-T49, 2017-T52, 2017-T54, 2017-T56, 2017-T57 & 2017-T58 -- 2017 TP2, 2017 TO2, 2017 TM2, 2017 TJ2, 2017 TG2, 2012 TC4
204Schiaparelli Obs. in Italy, 14 in MPECs 2017-T49, 2017-T50, 2017-T51, 2017-T52, 2017-T53, 2017-T54, 2017-T55 & 2017-T60 -- 2017 TN2, 2017 TK2, 2017 TJ2, 2017 TH2, 2017 TG2, 2017 TF2, 2017 TE2, 2017 SS19, 2017 SN14, 2017 SE2, 2017 RV1, 2016 BO1, 2012 TC4, 496005
033Schwarzschild Obs. in Germany, 5 in MPECs 2017-T49, 2017-T52, 2017-T56 & 2017-T57 -- 2017 TO2, 2017 TM2, 2017 TG2, 2012 TC4, 2011 EB7
Y00SONEAR in Brazil, 1 in MPEC 2017-T54 -- 2017 TJ2
587Sormano Obs. in Italy, 6 in MPECs 2017-T49, 2017-T51, 2017-T52, 2017-T53, 2017-T54 & 2017-T55 -- 2017 TK2, 2017 TJ2, 2017 TH2, 2017 TG2, 2017 TF2, 2012 TC4
691Spacewatch 0.9m telescope in Arizona, 6 in MPEC 2017-T49 -- 2017 RH15, 2017 QM18, 2017 QL33, 2017 MA4, 2017 GS6, 2011 EB7
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2017-T49 & 2017-T56 -- 2017 TM2, 2017 SG14
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2017-T49 -- 3122
W34Squirrel Valley Obs. in North Carolina, 3 in MPECs 2017-T49, 2017-T52 & 2017-T54 -- 2017 TJ2, 2017 TG2, 2012 TC4
J22Tacande Obs. in the Canary Islands, 3 in MPECs 2017-T50, 2017-T54 & 2017-T55 -- 2017 TK2, 2017 TJ2, 2017 TE2
926Tenagra II Obs. in Arizona, 11 in MPECs 2017-T49, 2017-T51, 2017-T52, 2017-T54, 2017-T55, 2017-T56, 2017-T57, 2017-T59 & 2017-T60 -- 2017 TU1, 2017 TO2, 2017 TN2, 2017 TM2, 2017 TL2, 2017 TK2, 2017 TJ2, 2017 TG2, 2017 TF2, 2017 SN14, 2017 SH14
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2017-T49 -- 2000 TL1
C51WISE in Earth polar orbit, 3 in MPEC 2017-T49 -- 265196, 10115, 3122
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 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 TP2JPL Sentry23582090-209011.280e-07-6.86-6.860JPL: Computed at 16:47 today Pacific time based on 20 observations spanning 1.6481 days (2017-Oct-11.17727 to 2017-Oct-12.82533). Diameter approximately 0.042 km. from weighted mean H=24.52.
2017 TU1JPL Sentry16002073-2116145.1156014e-06-6.14-6.730JPL: Computed at 08:48 today Pacific time based on 32 observations spanning 1.8202 days (2017-Oct-10.32694 to 2017-Oct-12.14711). Diameter approximately 0.020 km. from weighted mean H=26.20.

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 '17

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

2358Noted that JPL Sentry has posted 2017 TP2 as an impact risk - see above
2230Grabbed MPEC 2017-T57 - 2017 TO2 - see above
Grabbed MPEC 2017-T58 - 2017 TP2 - see above
Grabbed MPEC 2017-T59 - 2017 TL2 - see above
Grabbed MPEC 2017-T60 - 2017 TN2 - see above
2201Grabbed MPEC 2017-T50 - 2017 TE2 - see above
Grabbed MPEC 2017-T51 - 2017 TF2 - see above
Grabbed MPEC 2017-T52 - 2017 TG2 - see above
Grabbed MPEC 2017-T53 - 2017 TH2 - see above
Grabbed MPEC 2017-T54 - 2017 TJ2 - see above
Grabbed MPEC 2017-T55 - 2017 TK2 - see above
Grabbed MPEC 2017-T56 - 2017 TM2 - see above
1744Generated Traffic Report
1600Noted that JPL Sentry has updated its 2017 TU1 risk assessment - see above
1500Grabbed MPEC 2017-T49 - Daily Orbit Update - see above