Contents  on 11 November '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 11 November '17

One object reported inside ten LD

One minor object is reported today within ten lunar distances (LD) of Earth, and it is leaving. 2017 VC moves out from 9.90 to 10.04 LD. Next known, 444584 2006 UK arrives inside ten LD on November 16th.

This report was generated at 1852 UTC with first follow-up for departed risk-listed 2017 VJ in today's DOU MPEC along with continuing follow-up for 444584 2006 UK and departed objects 2017 VD, 2017 VC, 2017 VA, 2017 UP43 (risk listed), 171576 1999 VP11, and 496817 1989 VB, which also has new radar observation from October reported below.



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 11 November '17

Radar observation of one object

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


Data update noted at 0436 UTC when the database was dated 10 Nov.

NEOCP Activity  on 11 November '17

The MPC's NEO Confirmation Page has 67 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 67 objects listed. Of these, seventeen were "one nighters." So far The Tracking News has counted a total of 87 listings on the NEOCP today.

New MPECs  on 11 November '17

Minor Planet Electronic Circulars

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


<< DOU on 11 Nov. '17 >>  MPEC 2017-V39 - "13:05 UT" - Daily Orbit Update

Observers  on 11 November '17

A total of 22 observers appear in today's MPEC.

CodeObserver / observatory
C97Al-Fulaij Obs., 4 in MPEC 2017-V39 -- 2017 VD, 444584, 3361, 1865
H21Astronomical Research Obs. Westfield in Illinois, 10 in MPEC 2017-V39 -- 2017 VA, 2017 UZ4, 2017 UT2, 2017 UR4, 2017 UG43, 2017 UE45, 2017 UA43, 2017 TD4, 2017 SO17, 354101
T05ATLAS Haleakala in Hawaii, 21 in MPEC 2017-V39 -- 2017 VC, 2017 SO17, 2014 UR116, 1998 WP7, 68950, 505178, 504711, 497096, 496817, 495858, 420302, 333888, 303933, 19764, 162273, 144898, 142040, 140158, 8037, 2212, 1980
T08ATLAS Mauna Loa in Hawaii, 11 in MPEC 2017-V39 -- 2017 PS30, 53110, 497117, 361071, 171576, 16657, 162980, 138852, 11405, 6050, 3361
160Castelmartini Obs. in Italy, 12 in MPEC 2017-V39 -- 2017 RR15, 2010 SA12, 2004 SS, 96631, 504505, 496818, 333888, 265962, 162998, 143624, 142464, 11500
703Catalina Sky Survey in Arizona, 1 in MPEC 2017-V39 -- 503941
006Fabra Obs. in Spain, 1 in MPEC 2017-V39 -- 444584
F655David Asher in Northern Ireland via Faulkes Telescope North in Hawaii, 1 in MPEC 2017-V39 -- 496817
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 496817
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-V39 -- 3200
C94MASTER-II Tunka in Russia, 1 in MPEC 2017-V39 -- 17182
474Mt. John Obs. in New Zealand, 9 in MPEC 2017-V39 -- 2017 VV, 2017 VJ, 2017 UY4, 2017 UC45, 2017 TV4, 2017 SJ20, 2017 RP2, 2017 OP19, 2011 CX7
G96Mt. Lemmon Survey (MLS) in Arizona, 16 in MPEC 2017-V39 -- 2017 UE45, 2017 TD4, 2017 NL6, 2011 TG2, 53430, 504680, 504392, 504033, 503941, 439908, 190208, 189173, 17182, 6455, 6053, 1580
J43Oukaimeden Obs. in Morocco, 5 in MPEC 2017-V39 -- 2006 KA40, 503293, 333888, 8037, 4486
F51Pan-STARRS 1 (PS1) in Hawaii, 18 in MPEC 2017-V39 -- 2017 VD, 2017 UH3, 2017 SO14, 2017 QQ32, 2017 QL18, 2017 PA27, 2017 OH68, 2017 NL6, 2016 VU2, 2014 YC15, 2012 EC, 2011 JA8, 2004 SS, 504034, 351278, 349507, 17182, 1580
D29Purple Mtn. Obs. Xuyi Station in China, 11 in MPEC 2017-V39 -- 2017 PS30, 2010 VT11, 53319, 506074, 499307, 495891, 448628, 438430, 374851, 21374, 152667
691Spacewatch 0.9m telescope in Arizona, 6 in MPEC 2017-V39 -- 2017 UC5, 2017 TX3, 2017 RK1, 2017 QL33, 2015 BF4, 8035
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2017-V39 -- 2017 UP43, 2017 UE43, 2017 TS3
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2017-V39 -- 499490
I52Steward Obs. Mt. Lemmon Station in Arizona, 21 in MPEC 2017-V39 -- 2017 VD, 2017 VB, 2017 UZ4, 2017 UY42, 2017 UW42, 2017 UT, 2017 US1, 2017 UO44, 2017 UN7, 2017 UJ5, 2017 UH8, 2017 UG8, 2017 UF5, 2017 UB8, 2017 TX3, 2017 TW3, 2017 TU6, 2017 TQ6, 2017 TN6, 2017 SN14, 2017 OT18
926Tenagra II Obs. in Arizona, 4 in MPEC 2017-V39 -- 2017 VC, 2017 VB, 2017 UZ4, 2017 UE43
C51WISE in Earth polar orbit, 1 in MPEC 2017-V39 -- 96590
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 11 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.
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 VVJPL Sentry1620R E M O V E DJPL: Risk listing removed at 1555 UTC today
2017 VJJPL Sentry17002094-2116453.4049158e-05-4.50-4.700JPL: Computed at 08:42 today Pacific time based on 14 observations spanning 5.1219 days (2017-Nov-05.41077 to 2017-Nov-10.53264). Diameter approximately 0.041 km. from weighted mean H=24.57.
2017 UP43JPL Sentry16202110-211667.184018e-06-6.21-6.510JPL: Computed at 08:06 today Pacific time based on 42 observations spanning 12.770 days (2017-Oct-29.48637 to 2017-Nov-11.25618). Diameter approximately 0.018 km. from weighted mean H=26.41.
2017 UE43JPL Sentry16202081-2113104.076046e-06-5.08-5.280JPL: Computed at 07:55 today Pacific time based on 20 observations spanning 14.116 days (2017-Oct-28.36401 to 2017-Nov-11.47981). Diameter approximately 0.059 km. from weighted mean H=23.78.
2010 VP139JPL Sentry16202017-21163911.40167713e-05-6.43-7.360JPL: Computed at 15:22 April 7th Pacific time based on 12 observations spanning .04588 days (2010-Nov-14.27911 to 2010-Nov-14.32499). Diameter approximately 0.006 km. from weighted mean H=28.61.

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 11 November '17

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

1852Generated Traffic Report
1700Noted that JPL Sentry has updated its 2017 VJ risk assessment - see above
1620Noted that JPL Sentry has updated its 2010 VP139 risk assessment - see above
Noted that JPL Sentry has updated its 2017 UE43 risk assessment - see above
Noted that JPL Sentry has updated its 2017 UP43 risk assessment - see above
Noted that JPL Sentry has removed 2017 VV as an impact risk - see above
Grabbed MPEC 2017-V39 - Daily Orbit Update - see above
0436Noted Radar Astrometry database update - see above