Contents  on 8 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 8 November '17

Two objects reported inside ten LD

Two minor objects are reported to be within ten lunar distances (LD) of Earth today. Nearest is outbound risk-listed 2017 UJ43, which heads away from 6.14 to 7.35 LD.

Earth passage I D ~Size Distance Today  Notes
4.54 LD Nov. 52017 UJ43 10 m  6.14 to 7.35 LD risk
7.05 LD Nov. 52017 US7 13 m  8.89 to 10.20 LD exits ten LD
Approaching (sorted by 10-LD bubble entry date)
9.89 LD Nov. 102017 VC 84 m  < 10 LD Nov. 10 - DOU
8.66 LD Nov. 17444584 2006 UK 309 m  < 10 LD Nov. 16

This report was generated at 1950 UTC with the discovery of already departed 2017 VJ (MPEC), which passed our planet at about 2.3 LD on October 30th, and with first follow-up in today's DOU MPEC for departed 2017 VD and approaching 2017 VC, along with continuing follow-up for departed 171576 1999 VP11.



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.

NEOCP Activity  on 8 November '17

The MPC's NEO Confirmation Page has 64 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 64 objects listed. Of these, 24 were "one nighters." So far The Tracking News has counted a total of 69 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 8 November '17

Minor Planet Electronic Circulars

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


MPEC 2017-V27 - "17:47 UT" - 2017 VJ


<< DOU on 8 Nov. '17 >>  MPEC 2017-V26 - "13:04 UT" - Daily Orbit Update

Observers  on 8 November '17

Twelve observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2017-V27 -- 2017 VJ
T05ATLAS Haleakala in Hawaii, 12 in MPECs 2017-V26 & 2017-V27 -- 2017 VJ, 2017 UE45, 2014 YC15, 1998 WP7, 53430, 504680, 500749, 496005, 190208, 17182, 153415, 3200
T08ATLAS Mauna Loa in Hawaii, 23 in MPEC 2017-V26 -- 2017 VC, 2015 WA2, 96631, 90075, 87024, 65679, 53319, 497176, 496818, 411201, 265962, 242211, 21374, 171576, 162998, 142464, 141670, 11500, 10115, 7977, 5189, 3361, 1865
160Castelmartini Obs. in Italy, 5 in MPEC 2017-V26 -- 68950, 457768, 142040, 100926, 1980
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 8 in MPEC 2017-V26 -- 2017 UZ7, 2017 UY4, 2017 UV42, 2017 UK7, 2017 UB43, 2017 UA8, 2017 TA4, 2017 SL17
K05Eden Obs., 2 in MPEC 2017-V26 -- 2017 VD, 3122
J95Great Shefford Obs. in England, 2 in MPECs 2017-V26 & 2017-V27 -- 2017 VJ, 2017 VD
W87LCO Cerro Tololo C in Chile, 1 in MPEC 2017-V26 -- 497113
F51Pan-STARRS 1 (PS1) in Hawaii, 15 in MPEC 2017-V26 -- 2017 RD15, 2017 QQ32, 2013 QH48, 2011 VV5, 55408, 504711, 441825, 434051, 411201, 30825, 223456, 16657, 143404, 142464, 137799
Z38Picoto Obs., 4 in MPEC 2017-V26 -- 85839, 8037, 3122, 2212
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2017-V26 -- 3122
926Tenagra II Obs. in Arizona, 1 in MPEC 2017-V27 -- 2017 VJ
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 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 VJJPL Sentry20072094-2117583.40711577e-05-4.49-4.810JPL: Computed at 12:05 today Pacific time based on 11 observations spanning 3.1469 days (2017-Nov-05.41077 to 2017-Nov-08.55771). Diameter approximately 0.042 km. from weighted mean H=24.54.
2017 UZ7JPL Sentry1632R E M O V E DJPL: Risk listing removed at 1549 UTC today

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 8 November '17

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

2007Noted that JPL Sentry has posted 2017 VJ as an impact risk - see above
1950Generated Traffic Report
1801Grabbed MPEC 2017-V27 - 2017 VJ - see above
1632Noted that JPL Sentry has removed 2017 UZ7 as an impact risk - see above
Grabbed MPEC 2017-V26 - Daily Orbit Update - see above