Contents  on 12 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 12 November '17

No objects reported inside ten LD

Yes, there are no asteroids reported to be within ten lunar distances (LD) of our planet today, although the NEOCP is fairly active. See NASA/JPL's Scout page and sort the list on "CA Dist." for target estimated close approach in lunar distances. Note the admonition, however, that these are "unconfirmed objects and all information should therefore be treated as potentially unreliable." Also note that there is a cross-reference page for objects that have been removed from the NEOCP, correlating temporary NEOCP designations with the provisional designations used for discovery and subsequent reporting.

Next known to be approaching our neighborhood, 444584 2006 UK arrives inside ten LD on November 16th.

This report was generated at 2054 UTC with the discoveries of two already departed objects -- 2017 VL1 (MPEC), which passed us at 3.39 LD on November 5th, and 2017 VG1 (MPEC, DOU), which went by at 7.72 LD a day earlier. Today's DOU MPEC has follow-up for 444584 2006 UK and departed objects 171576 1999 VP11, 496817 1989 VB, and risk-listed 2017 VJ [first follow-up] and 2017 UQ7, as well as astrometry from last month for 496817 1989 VB and newly numbered 503941 2003 UV11, and from April 2016 for 2016 FW3 using the 8.2m Subaru Telescope to add 13.21 days to this dim object's previous 9.16-day observing arc last year (it was picked up again this September).

Reading:  In an update, Sky & Telescope notes that the Hubble Space Telescope will be used to observe "the quickly disappearing" 1I/`Oumuamua (A/2017 U1). (Hat tip to Bill Gray on the MPML.)



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 12 November '17

The MPC's NEO Confirmation Page has 55 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 55 objects listed. Of these, nineteen were "one nighters." So far The Tracking News has counted a total of 76 listings on the NEOCP today.

New MPECs  on 12 November '17

Minor Planet Electronic Circulars

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


MPEC 2017-V47 - "23:24 UT" - 2017 UX51


MPEC 2017-V46 - "23:20 UT" - 2017 UW51


<< DOU on 12 Nov. '17 >>  MPEC 2017-V45 - "13:04 UT" - Daily Orbit Update


MPEC 2017-V44 - "00:49 UT" - 2017 VL1


MPEC 2017-V43 - "00:46 UT" - 2017 VK1


MPEC 2017-V42 - "00:42 UT" - 2017 VJ1


MPEC 2017-V41 - "00:39 UT" - 2017 VH1


MPEC 2017-V40 - "00:35 UT" - 2017 VG1

Observers  on 12 November '17

A total of 36 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPECs 2017-V41 & 2017-V45 -- 2017 VJ, 2017 VH1, 2017 UA5, 2017 TR3, 2017 TP4, 2017 SO17, 2017 SL14
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2017-V40 -- 2017 VG1
T08ATLAS Mauna Loa in Hawaii, 22 in MPECs 2017-V40, 2017-V43 & 2017-V45 -- 2017 VU, 2017 VK1, 2017 VG1, 99907, 90075, 65679, 53319, 506074, 504711, 333888, 242211, 21374, 162998, 159399, 154589, 142040, 105140, 7977, 5189, 1980, 1865, 1627
C77Bernezzo Obs. in Italy, 1 in MPEC 2017-V43 -- 2017 VK1
Z84Calar Alto Schmidt in Spain, 3 in MPECs 2017-V44, 2017-V46 & 2017-V47 -- 2017 VL1, 2017 UX51, 2017 UW51
160Castelmartini Obs. in Italy, 14 in MPEC 2017-V45 -- 2017 RV1, 96744, 68950, 65679, 503941, 496817, 496018, 190208, 143404, 142040, 8037, 3361, 3200, 1865
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 2 in MPECs 2017-V46 & 2017-V47 -- 2017 UX51, 2017 UW51
K51Celado Obs. in Italy, 1 in MPEC 2017-V46 -- 2017 UW51
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 31 in MPECs 2017-V42 & 2017-V45 -- 2017 VV, 2017 VJ1, 2017 UV42, 2017 UR7, 2017 UQ7, 2017 UP44, 2017 UK2, 2017 UD8, 2017 UB43, 2017 UA8, 2017 TR3, 2017 TQ3, 2017 TN4, 2017 TJ4, 2017 TB4, 2017 TA4, 2017 ST20, 2017 SP12, 2017 SK2, 2017 SC14, 2017 RU, 2017 RL15, 2017 RH15, 2017 QR17, 2017 QL35, 2017 QJ33, 2017 PR25, 2017 PC27, 2017 MW7, 2017 KO4, 2017 KE3
850Cordell-Lorenz Obs. in Tennessee, 3 in MPECs 2017-V40, 2017-V43 & 2017-V46 -- 2017 VK1, 2017 VG1, 2017 UW51
V16Dark Sky New Mexico Obs. in New Mexico, 3 in MPEC 2017-V45 -- 171576, 3200, 3122
J27El Guijo Obs. in Spain, 3 in MPEC 2017-V45 -- 444584, 17511, 17182
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-V46 -- 2017 UW51
695^Spacewatch via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2017-V46 -- 2017 UW51
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2017-V41 -- 2017 VH1
W92MASTER OAFA Obs., 1 in MPEC 2017-V45 -- 140158
711McDonald Obs. in Texas, 9 in MPECs 2017-V40, 2017-V41, 2017-V43, 2017-V45, 2017-V46 & 2017-V47 -- 2017 VK1, 2017 VH1, 2017 VG1, 2017 UY44, 2017 UX51, 2017 UW51, 2017 UO1, 2017 UE43, 2017 TQ6
Z37MPC code Z37, 1 in MPEC 2017-V45 -- 2017 PT25
474Mt. John Obs. in New Zealand, 1 in MPEC 2017-V42 -- 2017 VJ1
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2017-V41, 2017-V45 & 2017-V46 -- 2017 VH1, 2017 UW51
J43Oukaimeden Obs. in Morocco, 2 in MPEC 2017-V45 -- 8037, 2212
F51Pan-STARRS 1 (PS1) in Hawaii, 7 in MPECs 2017-V42, 2017-V44, 2017-V45, 2017-V46 & 2017-V47 -- 2017 VL1, 2017 VJ1, 2017 UX51, 2017 UW51, 2017 TX3, 2013 GA80, 90075
K63Pascoli Obs. in Italy, 1 in MPEC 2017-V40 -- 2017 VG1
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2017-V46 -- 2017 UW51
W25RMS Obs., 1 in MPEC 2017-V40 -- 2017 VG1
204Schiaparelli Obs. in Italy, 1 in MPEC 2017-V43 -- 2017 VK1
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-V46 -- 2017 UW51
W881Tony Evans in Portugal via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-V45 -- 2017 VG1
W885M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-V45 -- 2011 EB7
691Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2017-V45, 2017-V46 & 2017-V47 -- 2017 UX51, 2017 UW51, 2017 SY20, 2017 SF14, 2014 WG365, 8201
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2017-V43, 2017-V45 & 2017-V46 -- 2017 VK1, 2017 UY4, 2017 UW51, 2017 UR4, 2017 UQ51, 2017 UA45, 2017 RL1, 2003 UW29
V78Spirit Marsh Obs. in Minnesota, 2 in MPEC 2017-V45 -- 3200, 3122
W34Squirrel Valley Obs. in North Carolina, 2 in MPECs 2017-V43 & 2017-V45 -- 2017 VK1, 162472
I52Steward Obs. Mt. Lemmon Station in Arizona, 16 in MPECs 2017-V40, 2017-V41, 2017-V43, 2017-V44, 2017-V45 & 2017-V46 -- 2017 VL1, 2017 VK1, 2017 VH1, 2017 VG1, 2017 UX4, 2017 UW51, 2017 UP44, 2017 UO1, 2017 UF43, 2017 TO4, 2017 TJ1, 2017 SR12, 2017 RR15, 2017 QO17, 2017 PR25, 2009 TK8
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2017-V40 -- 2017 VG1
926Tenagra II Obs. in Arizona, 5 in MPECs 2017-V40, 2017-V41, 2017-V43, 2017-V44 & 2017-V46 -- 2017 VL1, 2017 VK1, 2017 VH1, 2017 VG1, 2017 UW51
T09UH/Tholen NEO Follow-Up Subaru Telescope in Hawaii, 1 in MPEC 2017-V45 -- 2016 FW3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 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 Sentry16172097-2117382.9995874e-05-4.59-4.790JPL: Computed at 08:06 today Pacific time based on 17 observations spanning 5.8175 days (2017-Nov-05.41077 to 2017-Nov-11.228256). Diameter approximately 0.040 km. from weighted mean H=24.65.
NEODyS16172089-2116585.5e-06-5.25-5.990NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2017-11-05.412 to 2017-11-08.559."
2017 UA45JPL Sentry17002078-2117740.000184790906-4.61-4.970JPL: Computed at 08:27 today Pacific time based on 18 observations spanning 15.747 days (2017-Oct-27.47452 to 2017-Nov-12.22184). Diameter approximately 0.021 km. from weighted mean H=26.03.
2017 UE43JPL Sentry16172045-211373.107736e-06-5.17-5.480JPL: Computed at 07:54 today Pacific time based on 23 observations spanning 14.994 days (2017-Oct-28.36401 to 2017-Nov-12.35838). Diameter approximately 0.059 km. from weighted mean H=23.78.
2017 UQ7JPL Sentry17002096-209614.152e-08-7.59-7.590JPL: Computed at 08:44 today Pacific time based on 57 observations spanning 16.000 days (2017-Oct-26.21101 to 2017-Nov-11.21143). Diameter approximately 0.031 km. from weighted mean H=25.17.

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 November '17

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

2328Grabbed MPEC 2017-V46 - 2017 UW51 - see above
Grabbed MPEC 2017-V47 - 2017 UX51 - see above
2054Generated Traffic Report
1700Noted that JPL Sentry has updated its 2017 UA45 risk assessment - see above
Noted that JPL Sentry has reposted 2017 UQ7 as an impact risk - see above
1617Noted that JPL Sentry has updated its 2017 UE43 risk assessment - see above
Noted that JPL Sentry has updated its 2017 VJ risk assessment - see above
Noted that NEODyS has posted 2017 VJ as an impact risk - see above
Grabbed MPEC 2017-V45 - Daily Orbit Update - see above
0101Grabbed MPEC 2017-V40 - 2017 VG1 - see above
Grabbed MPEC 2017-V41 - 2017 VH1 - see above
Grabbed MPEC 2017-V42 - 2017 VJ1 - see above
Grabbed MPEC 2017-V43 - 2017 VK1 - see above
Grabbed MPEC 2017-V44 - 2017 VL1 - see above