Contents  on 7 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 7 November '17

Three objects reported inside ten LD

Three Solar-System small bodies are known to be inside ten lunar distances (LD) of our home world today. Closest is risk-listed 2017 UJ43, which is outbound from 5.19 to 6.14 LD. Newly announced intruder 2017 VE departs from inside ten LD, passing from 8.81 to 11.95 LD after flying past us at 0.88 LD on November 4th.

Earth passage I D ~Size Distance Today  Notes
0.88 LD Nov. 42017 VE 16 m  8.81 to 11.95 LD NEW, intruder, exits ten LD - MPEC
4.54 LD Nov. 52017 UJ43 10 m  5.19 to 6.14 LD risk
7.05 LD Nov. 52017 US7 13 m  7.85 to 8.89 LD
Approaching (sorted by 10-LD bubble entry date)
9.90 LD Nov. 102017 VC 86 m  < 10 LD Nov. 10, NEW - MPEC
8.66 LD Nov. 17444584 2006 UK 309 m  < 10 LD Nov. 16 - DOU

This report was generated at 1910 UTC with the discoveries announced late yesterday of 2017 VE and 2017 VC (see details in the active traffic table above), and of departed 2017 VD (MPEC, DOU), which went by at 9.88 LD on November 2nd and is estimated to be roughly 214 meters in diameter. Today's DOU MPEC has follow-up for 444584 2006 UK.

Reading:  MPEC 2017-V17 was posted late yesterday to announce a "New Designation Scheme for Interstellar Objects" and also to announce that A/2017 U1 (links) has now been given the identifier 1I/'Oumuamua. A lively discussion has ensued on the Minor Planet Mailing List (MPML).
        NASA/Goddard has a news item about the October recovery of 96P/Machholz 1 (1986 J2) using SOHO and STEREO space observatories.
        ALMA has discovered a belt of cold dust around the nearest star, Proxima Centauri, in addition to the Earth-size planet announced last year.

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 7 November '17

The MPC's NEO Confirmation Page has 65 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 65 objects listed. Of these, 25 were "one nighters." So far The Tracking News has counted a total of 77 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 7 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 7 Nov. '17 >>  MPEC 2017-V25 - "13:03 UT" - Daily Orbit Update

Observers  on 7 November '17

Eighteen observers appear in today's MPEC.

CodeObserver / observatory
C97Al-Fulaij Obs., 1 in MPEC 2017-V25 -- 90075
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPEC 2017-V25 -- 2017 TS3, 2017 MB4, 2016 FS6
T05ATLAS Haleakala in Hawaii, 15 in MPEC 2017-V25 -- 2017 SL2, 2017 QL18, 2015 UK52, 2014 UR116, 85839, 68950, 504711, 415029, 333888, 162273, 142040, 8567, 8037, 2212, 1980
T08ATLAS Mauna Loa in Hawaii, 4 in MPEC 2017-V25 -- 496818, 16657, 154589, 6050
160Castelmartini Obs. in Italy, 30 in MPEC 2017-V25 -- 2017 UO, 2017 SL2, 2017 QQ32, 2017 QL18, 99907, 96744, 96590, 87311, 85628, 65679, 506074, 504711, 503941, 497176, 496817, 496816, 495858, 444584, 337228, 265962, 162998, 162273, 162011, 159399, 143404, 137062, 8037, 3361, 3200, 1865
H15ISON New Mexico Obs. in New Mexico, 1 in MPEC 2017-V25 -- 2017 VD
U69$Marian Urbanik in Slovakia via iTelescope Obs. Auberry in northern California, 1 in MPEC 2017-V25 -- 444584
I89'Steven M. Tilley in Louisiana via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2017-V25 -- 2017 VD
W92MASTER OAFA Obs., 1 in MPEC 2017-V25 -- 11405
Z80Northolt Branch Obs. in England, 1 in MPEC 2017-V25 -- 3122
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2017-V25 -- 504505
F51Pan-STARRS 1 (PS1) in Hawaii, 13 in MPEC 2017-V25 -- 2017 UP44, 2017 QL33, 2017 FJ90, 2012 QB17, 2000 DQ110, 96744, 500749, 499998, 403039, 374038, 154268, 11405, 3361
Z38Picoto Obs., 3 in MPEC 2017-V25 -- 8037, 3200, 2368
D29Purple Mtn. Obs. Xuyi Station in China, 4 in MPEC 2017-V25 -- 411201, 20826, 10115, 5143
L04ROASTERR-1 in Romania, 4 in MPEC 2017-V25 -- 2017 SL2, 1998 WP7, 444584, 333888
C95SATINO-1 in France, 1 in MPEC 2017-V25 -- 2017 VD
204Schiaparelli Obs. in Italy, 2 in MPEC 2017-V25 -- 503941, 503880
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-V25 -- 2000 TL1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 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 OD69NEODyS1712R E M O V E D-

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 7 November '17

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

1910Generated Traffic Report
1712Noted that NEODyS has removed 2017 OD69 as an impact risk - see above
Grabbed MPEC 2017-V25 - Daily Orbit Update - see above