Contents  on 10 November '17

Asteroid/Comet Connection (A/CC) Resources:

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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 November '17

Two objects reported inside ten LD

Today there are two Solar-System small bodies reported inside ten lunar distances (LD) of Earth. Risk-listed 2017 UJ43 is the nearest but exits ten LD, moving from 8.69 to 10.12 LD.

Earth passage I D ~Size Distance Today  Notes
4.54 LD Nov. 52017 UJ43 10 m  8.69 to 10.12 LD exits ten LD, risk
9.89 LD today2017 VC 82 m  9.89 LD enters ten LD, Earth closest at 2257 UTC
8.66 LD Nov. 17444584 2006 UK 309 m  < 10 LD Nov. 16 - DOU

This report was generated at 1845 UTC with follow-up in today's DOU MPEC for approaching 444584 2006 UK and departed objects 2017 VD and 2017 VA, plus astrometry from last month for 2017 BW.

Catching up on radar study of close passers from early to mid-October, we note that observation of newly numbered 496817 1989 VB was posted November 6th and of intruder 2012 TC4 on the 3rd.

Counts:  A diagnostic check turned up two close-passers that our reporting missed during October. The discovery announcement of 2017 UP was one of many on October 19th, but it was posted in the DOU rather than given its own MPEC. This object passed Earth at 6.57 LD on October 20th and has yet to have follow-up reported. 2013 UM9 was recovered on October 17th, after flying by us at 9.13 LD on the 13th, and continued to be followed for the rest of the month.
        These two additions bring to 101 the count of asteroids known to have approached Earth at less than ten LD during October. Since we started counting ten-plus years ago (see timeline), the high hadn't exceeded 70 except for 84 this past March. What may be more interesting, however, is that on two days -- October 13th and 15th -- we now know there were 35 visitors inside our ten-LD traffic reporting "bubble" simultaneously, which is another record. But, when you read the daily traffic reports at the time (see the 13th and 15th), we only knew then of nine or ten. There were actually some fifteen more objects that hadn't been discovered and announced. And note that the October count isn't done. There almost certainly will be more belated discoveries posted this month, and, in coming years, objects will be discovered with orbit solutions that calculate back to unobserved passages last month.

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 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.

Radar Astrometry  on 10 November '17

Radar observation of two objects

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:

Data update noted at 2239 UTC when the database was dated 10 Nov.

Data update noted at 2323 UTC when the database was dated 10 Nov.

NEOCP Activity  on 10 November '17

The MPC's NEO Confirmation Page has 81 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 81 objects listed. Of these, 43 were "one nighters." So far The Tracking News has counted a total of 103 listings on the NEOCP today.

New MPECs  on 10 November '17

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 2017-V38 - "19:15 UT" - 1I/`Oumuamua

MPEC 2017-V37 - "16:16 UT" - 2017 VV

MPEC 2017-V36 - "16:13 UT" - 2017 VU

MPEC 2017-V35 - "16:10 UT" - 2017 VT

MPEC 2017-V34 - "16:07 UT" - 2017 UR51

MPEC 2017-V33 - "16:04 UT" - 2017 UQ51

MPEC 2017-V32 - "16:00 UT" - 2017 UP51

MPEC 2017-V31 - "15:57 UT" - 2017 UO51

MPEC 2017-V30 - "15:38 UT" - 2010 EK44

<< DOU on 10 Nov. '17 >>  MPEC 2017-V29 - "13:04 UT" - Daily Orbit Update

Observers  on 10 November '17

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 16 in MPECs 2017-V29, 2017-V32, 2017-V33, 2017-V34, 2017-V36 & 2017-V37 -- 2017 VV, 2017 VU, 2017 VA, 2017 UZ7, 2017 UR51, 2017 UR4, 2017 UQ51, 2017 UP51, 2017 UO6, 2017 UA5, 2017 TY4, 2017 TP4, 2017 TO5, 2017 PF, 2017 MN7, 2011 XO3
T05ATLAS Haleakala in Hawaii, 28 in MPECs 2017-V29 & 2017-V36 -- 2017 VU, 2017 UZ42, 2017 SS19, 99907, 96631, 90075, 85709, 65679, 53319, 506074, 497176, 338292, 338176, 333908, 265962, 242211, 21374, 162998, 159399, 8035, 7977, 7336, 5189, 3361, 1980, 1865, 1627, 1036
T08ATLAS Mauna Loa in Hawaii, 12 in MPEC 2017-V29 -- 2017 UZ42, 2017 UE45, 2014 YC15, 53430, 500749, 496005, 444584, 190208, 17182, 137062, 3200, 1580
309'Martin Altmann in Germany via Cerro Paranal in Chile, 1 in MPEC 2017-V33 -- 2017 UQ51
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2017-V29, 2017-V34 & 2017-V35 -- 2017 VT, 2017 UZ42, 2017 UR51
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2017-V36 -- 2017 VU
006Fabra Obs. in Spain, 1 in MPEC 2017-V29 -- 444584
734Farpoint Obs. in Kansas, 1 in MPEC 2017-V37 -- 2017 VV
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2017-V36 -- 2017 VU
K88GINOP-KHK in Hungary, 1 in MPEC 2017-V29 -- 2017 BW
253Goldstone DSS-14 70m antenna in southern California, 2 in radar -- 2017 RV1, 3122
G48Harlingten Research Obs. in New Mexico, 1 in MPEC 2017-V29 -- 2017 VD
987Isle of Man Obs. on the Isle of Man, 1 in MPEC 2017-V29 -- 3122
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 2 in MPECs 2017-V31 & 2017-V33 -- 2017 UQ51, 2017 UO51
W85LCO Cerro Tololo A in Chile, 1 in MPEC 2017-V29 -- 497113
W87LCO Cerro Tololo C in Chile, 1 in MPEC 2017-V29 -- 497113
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2017-V38 -- 1
C94MASTER-II Tunka in Russia, 1 in MPEC 2017-V29 -- 444584
474Mt. John Obs. in New Zealand, 2 in MPECs 2017-V35 & 2017-V37 -- 2017 VV, 2017 VT
F51Pan-STARRS 1 (PS1) in Hawaii, 20 in MPECs 2017-V29, 2017-V31, 2017-V32, 2017-V33, 2017-V34, 2017-V36 & 2017-V37 -- 2017 VV, 2017 VU, 2017 UR51, 2017 UQ51, 2017 UP51, 2017 UO51, 2017 UH44, 2017 TR1, 2017 SY20, 2014 UR116, 2014 LA27, 2014 HR4, 505178, 504505, 504074, 504034, 499490, 444584, 351545, 141670
Z38Picoto Obs., 7 in MPEC 2017-V29 -- 85839, 8037, 6053, 3200, 3122, 2368, 2212
204Schiaparelli Obs. in Italy, 1 in MPEC 2017-V36 -- 2017 VU
691Spacewatch 0.9m telescope in Arizona, 9 in MPEC 2017-V29 -- 2017 UV5, 2017 UO, 2017 UD45, 2017 UC8, 2017 SV20, 2017 SS17, 2017 SL14, 2017 QL33, 2014 TW57
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2017-V29, 2017-V31, 2017-V32 & 2017-V34 -- 2017 UR51, 2017 UR4, 2017 UP51, 2017 UO51, 2017 UC8, 2017 UA45, 2017 TS3, 2014 JN57
W34Squirrel Valley Obs. in North Carolina, 3 in MPEC 2017-V29 -- 17182, 162273, 1865
926Tenagra II Obs. in Arizona, 3 in MPECs 2017-V29, 2017-V32 & 2017-V37 -- 2017 VV, 2017 UP51, 2017 UA43
Z52The Studios Obs., 1 in MPEC 2017-V29 -- 1980
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPECs 2017-V29 & 2017-V30 -- 2010 YD3, 2010 EK44
C51WISE in Earth polar orbit, 1 in MPEC 2017-V35 -- 2017 VT
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 November '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.





Notes for Today's Latest Risk Assessments
2017 VVJPL Sentry18152024-2072231.1793e-08-5.17-5.480JPL: Computed at 09:53 today Pacific time based on 17 observations spanning 2.9186 days (2017-Nov-07.34794 to 2017-Nov-10.26657). Diameter approximately 0.257 km. from weighted mean H=20.61.
2017 VTJPL Sentry18152031-209843.43479e-08-5.61-5.790JPL: Computed at 09:44 today Pacific time based on 23 observations spanning 6.4863 days (2017-Nov-03.99656 to 2017-Nov-10.4829). Diameter approximately 0.202 km. from weighted mean H=21.14.
2017 UR51JPL Sentry18152030-21151022.54229426e-05-3.17-3.700JPL: Computed at 09:58 today Pacific time based on 12 observations spanning 9.8260 days (2017-Oct-30.52142 to 2017-Nov-09.347383). Diameter approximately 0.111 km. from weighted mean H=22.38.
2017 UA45JPL Sentry16302078-2117830.0001804662746-4.65-5.050JPL: Computed at 08:27 today Pacific time based on 15 observations spanning 13.830 days (2017-Oct-27.47452 to 2017-Nov-10.30446). Diameter approximately 0.021 km. from weighted mean H=26.08.

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 November '17

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

2323Noted Radar Astrometry database update - see above
2239Noted Radar Astrometry database update - see above
1930Grabbed MPEC 2017-V38 - 1I/`Oumuamua - see above
1845Generated Traffic Report
1815Noted that JPL Sentry has posted 2017 UR51 as an impact risk - see above
Noted that JPL Sentry has posted 2017 VT as an impact risk - see above
Noted that JPL Sentry has posted 2017 VV as an impact risk - see above
1630Noted that JPL Sentry has updated its 2017 UA45 risk assessment - see above
Grabbed MPEC 2017-V33 - 2017 UQ51 - see above
Grabbed MPEC 2017-V34 - 2017 UR51 - see above
Grabbed MPEC 2017-V35 - 2017 VT - see above
Grabbed MPEC 2017-V36 - 2017 VU - see above
Grabbed MPEC 2017-V37 - 2017 VV - see above
1603Grabbed MPEC 2017-V30 - 2010 EK44 - see above
Grabbed MPEC 2017-V31 - 2017 UO51 - see above
Grabbed MPEC 2017-V32 - 2017 UP51 - see above
1503Grabbed MPEC 2017-V29 - Daily Orbit Update - see above