Contents  on 28 November '16

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 28 November '16

Eleven objects reported inside ten LD

Eleven small Solar-System bodies are reported to be within ten lunar distances (LD) of Earth today. Nearest is NHATS target 2016 WQ3, inbound from 3.28 to 2.62 LD. Much further out, risk-listed NHATS target 2016 WF7 leaves our ten-LD traffic reporting "bubble," traveling from 9.46 to 10.90 LD. Of today's new discoveries, 2016 WR8 is outbound from 7.17 to 8.63 LD and 2016 WQ8 will enter ten LD on December 6th.

Earth passage I D ~Size Distance Today  Notes
0.35 LD Nov. 252016 WW2 5 m  6.24 to 8.39 LD intruder
1.46 LD Nov. 252016 WU2 11 m  5.00 to 6.62 LD NHATS target
1.48 LD Dec. 12016 WQ3 6 m  2.62 from 3.28 LD NHATS target - DOU
1.73 LD Nov. 172016 WY 5 m  7.73 to 8.43 LD Moon buzzer, NHATS target, risk
1.95 LD Nov. 212016 WF7 6 m  9.46 to 10.90 LD exits ten LD, NHATS target, risk - DOU
2.61 LD Dec. 12016 WG7 22 m  4.71 from 6.00 LD NHATS target - DOU
4.18 LD Dec. 62016 WD7 12 m  6.25 from 6.74 LD NHATS target
4.45 LD Nov. 302016 WQ 26 m  6.29 from 8.71 LD
6.48 LD Nov. 262016 WR8 11 m  7.17 to 8.63 LD NEW - MPEC
6.69 LD Nov. 252016 WV2 18 m  8.03 to 9.10 LD
8.31 LD yesterday2016 WA8 38 m  8.32 to 8.99 LD DOU
Approaching
3.61 LD Dec. 52016 WB8 23 m  < 10 LD Nov. 30, NHATS target - DOU
5.1   LD Dec. 82016 WQ8 39 m  < 10 LD Dec. 6, NEW, uncertainty +/- 17 mins. - MPEC
6.2   LD Dec. 212015 YQ1 9 m  < 10 LD Dec. 18, uncertainty +/- 20 mins., NHATS target
7.43 LD Dec. 132015 XX169 11 m  < 10 LD Dec. 9, NHATS target
9.61 LD Dec. 132015 YA 11 m  < 10 LD Dec. 12, NHATS target

This report was updated at 2012 UTC with new discoveries 2016 WR8 (MPEC) and 2016 WQ8 (MPEC), and to note first follow-up for 2016 WB8, 2016 WG7, 2016 WF7, and 2016 WQ3 in today's DOU MPEC, along with additional observation of 2016 WA8 and departed risk-listed NHATS target 2016 WT7, and follow-up for departed risk-listed 2016 WG. To this reporting we have today added three NHATS targets that were discovered late last year and return next month: 2015 YQ1, 2015 YA, and 2015 XX169. Your first neighborly asteroids traffic report was generated at 0517 UTC.



Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting on transient natural objects that approach the actually significant 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 28 November '16

The MPC's NEO Confirmation Page has 63 listings

When last checked at 2130 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 63 objects listed. Of these, 42 were "one nighters." So far The Tracking News has counted a total of 79 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 28 November '16

Minor Planet Electronic Circulars

As of last check at 2130 UTC, there have been twelve MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2016-W116 - "17:34 UT" - 2016 WR8


MPEC 2016-W115 - "17:31 UT" - 2016 WQ8


MPEC 2016-W114 - "17:28 UT" - 2016 WP8


MPEC 2016-W113 - "17:26 UT" - 2016 WO8


MPEC 2016-W112 - "17:23 UT" - 2016 WN8


MPEC 2016-W111 - "17:20 UT" - 2016 WM8


MPEC 2016-W110 - "17:15 UT" - 2016 WL8


MPEC 2016-W109 - "17:12 UT" - 2016 WK8


MPEC 2016-W108 - "17:09 UT" - 2016 WJ8


MPEC 2016-W107 - "17:07 UT" - 2016 WH8


MPEC 2016-W106 - "14:28 UT" - 2016 JG18


<< DOU on 28 Nov. '16 >>  MPEC 2016-W105 - "13:05 UT" - Daily Orbit Update

Observers  on 28 November '16

A total of 32 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPEC 2016-W105 -- 2016 VZ3, 2016 VT2, 2016 UA, 2016 TS92, 2016 ON, 2013 YB38, 476187
300Bisei Spaceguard Center in Japan, 1 in MPEC 2016-W110 -- 2016 WL8
160Castelmartini Obs. in Italy, 3 in MPEC 2016-W105 -- 24445, 162269, 137032
107Cavezzo Obs. in Italy, 3 in MPEC 2016-W105 -- 2006 UM, 2005 TF, 203217
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 15 in MPECs 2016-W105, 2016-W106, 2016-W111, 2016-W112 & 2016-W114 -- 2016 WR3, 2016 WP8, 2016 WP, 2016 WN8, 2016 WM8, 2016 VU3, 2016 VE2, 2016 UU80, 2016 UL41, 2016 TX55, 2016 TK17, 2016 TB93, 2016 SV1, 2016 RB18, 2016 JG18
K65Cesena Obs. in Italy, 1 in MPEC 2016-W105 -- 2016 QD
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 8 in MPEC 2016-W105 -- 2016 WQ3, 2016 WH1, 2016 WF7, 2016 WE1, 2016 WD3, 2016 WB8, 2016 WA2, 2016 VN4
J95Great Shefford Obs. in England, 1 in MPEC 2016-W108 -- 2016 WJ8
B15Inastars Obs. in Germany, 1 in MPEC 2016-W105 -- 2016 WZ7
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2016-W105 -- 2016 WJ1
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2016-W111, 2016-W112 & 2016-W114 -- 2016 WP8, 2016 WN8, 2016 WM8
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2016-W105 -- 1943
474Mt. John Obs. in New Zealand, 1 in MPEC 2016-W105 -- 2016 VU3
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2016-W107, 2016-W109, 2016-W111, 2016-W112, 2016-W113, 2016-W114, 2016-W115 & 2016-W116 -- 2016 WR8, 2016 WQ8, 2016 WP8, 2016 WO8, 2016 WN8, 2016 WM8, 2016 WK8, 2016 WH8
K74Muensterschwarzach Obs. in Germany, 2 in MPEC 2016-W105 -- 2016 WJ1, 2016 WG7
F51Pan-STARRS 1 (PS1) in Hawaii, 10 in MPECs 2016-W105, 2016-W108, 2016-W110 & 2016-W115 -- 2016 WQ8, 2016 WL8, 2016 WJ8, 2013 TT135, 2012 UA34, 2011 UX192, 96189, 474425, 474179, 220124
D29Purple Mtn. Obs. Xuyi Station in China, 6 in MPEC 2016-W105 -- 2016 LM8, 2011 QP96, 90075, 470510, 40329, 20460
W25RMS Obs., 4 in MPEC 2016-W105 -- 2016 WG, 2005 TF, 2003 WU21, 275611
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2016-W110 & 2016-W116 -- 2016 WR8, 2016 WL8
H36Sandlot Obs. in Kansas, 1 in MPEC 2016-W105 -- 2016 WT7
L23Schela Obs. in Romania, 1 in MPEC 2016-W105 -- 433
204Schiaparelli Obs. in Italy, 1 in MPEC 2016-W116 -- 2016 WR8
033Schwarzschild Obs. in Germany, 9 in MPECs 2016-W105, 2016-W107, 2016-W108, 2016-W109, 2016-W110, 2016-W112, 2016-W113 & 2016-W116 -- 2016 WZ7, 2016 WR8, 2016 WO8, 2016 WN8, 2016 WL8, 2016 WK8, 2016 WJ8, 2016 WH8, 2016 WA8
W885M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2016-W105 -- 163249
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2016-W108 -- 2016 WJ8
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2016-W111 -- 2016 WM8
W34Squirrel Valley Obs., 3 in MPEC 2016-W105 -- 2006 UM, 433953, 3691
I93St. Pardon de Conques Obs. in France, 4 in MPECs 2016-W107, 2016-W112, 2016-W115 & 2016-W116 -- 2016 WR8, 2016 WQ8, 2016 WN8, 2016 WH8
I52Steward Obs. Mt. Lemmon Station in Arizona, 8 in MPECs 2016-W107, 2016-W108, 2016-W109, 2016-W111, 2016-W112, 2016-W113, 2016-W114 & 2016-W115 -- 2016 WQ8, 2016 WP8, 2016 WO8, 2016 WN8, 2016 WM8, 2016 WK8, 2016 WJ8, 2016 WH8
926Tenagra II Obs. in Arizona, 4 in MPECs 2016-W108, 2016-W109, 2016-W111 & 2016-W112 -- 2016 WN8, 2016 WM8, 2016 WK8, 2016 WJ8
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2016-W105 -- 2016 WN1
2906Mark Trueblood via Vatican Advanced Technology Telescope in Arizona, 1 in MPEC 2016-W105 -- 2015 XF261
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 November '16

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2130 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 JPL NEO Program 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
2016 WJ8JPL Sentry19092023-2112701.1e-07-3.32-3.780JPL: "Analysis based on 26 observations spanning 3.6388 days (2016-Nov-24.24332 to 2016-Nov-27.88212)." Diameter approximately 0.782 km. from mean, weighted H=18.2.
2016 WF7JPL Sentry16252105-211351.2e-06-8.13-8.330JPL: "Analysis based on 22 observations spanning 2.6568 days (2016-Nov-24.31631 to 2016-Nov-26.973136)." Diameter approximately 0.006 km. from mean, weighted H=28.7.
2016 WA2JPL Sentry1909210711.2e-09-7.93-7.930JPL #2 for the day: "Analysis based on 40 observations spanning 7.7414 days (2016-Nov-19.17089 to 2016-Nov-26.91228)." Diameter approximately 0.089 km. from mean, weighted H=22.9.
NEODyS1702R E M O V E D-
2016 WQ1NEODyS00512046-210841.68e-07-8.10-8.130NEODyS: "Based on 52 optical observations (of which 1 are rejected as outliers) from 2016-11-20.409 to 2016-11-27.041."
2016 WN1JPL Sentry1702211212.1e-05-5.00-5.000JPL #2 for the day: "Analysis based on 36 observations spanning 7.7315 days (2016-Nov-19.26009 to 2016-Nov-26.991552)." Diameter approximately 0.030 km. from mean, weighted H=25.3.
NEODyS1702211212.1e-05-4.99-4.990NEODyS #2 for the day: "Based on 36 optical observations (of which 0 are rejected as outliers) from 2016-11-19.261 to 2016-11-26.992."
2016 WM1NEODyS0051R E M O V E D-
2016 WJ1JPL Sentry19092030-2114772.3e-04-1.73-2.091JPL #2 for the day: "Analysis based on 116 observations spanning 8.7318 days (2016-Nov-19.46522 to 2016-Nov-28.19699)." Diameter approximately 0.180 km. from mean, weighted H=21.4.
NEODyS00512030-2116911.87e-04-1.80-2.211NEODyS: "Based on 108 optical observations (of which 0 are rejected as outliers) from 2016-11-19.466 to 2016-11-27.098."
2016 WYJPL Sentry19092084-2114201.1e-04-6.45-6.680JPL: "Analysis based on 27 observations spanning 4.9616 days (2016-Nov-19.26009 to 2016-Nov-24.22168)." Diameter approximately 0.005 km. from mean, weighted H=29.2.
NEODyS00512084-2114476.76e-05-6.64-6.840NEODyS: "Based on 41 optical observations (of which 4 are rejected as outliers) from 2016-11-19.261 to 2016-11-24.222."
2016 WUNEODyS00512083-2113145.69e-07-7.72-7.940NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2016-11-18.466 to 2016-11-26.948."
2016 WTJPL Sentry19092072-2115362.3e-05-7.20-8.080JPL: "Analysis based on 28 observations spanning 4.0690 days (2016-Nov-18.43417 to 2016-Nov-22.503178)." Diameter approximately 0.004 km. from mean, weighted H=29.7.
2016 WGJPL Sentry19092076-2115225.5e-06-4.25-4.910JPL #2 for the day: "Analysis based on 124 observations spanning 6.9948 days (2016-Nov-18.43559 to 2016-Nov-25.43035)." Diameter approximately 0.074 km. from mean, weighted H=23.3.
NEODyS00512076-2115454.62e-06-4.38-5.210NEODyS: "Based on 135 optical observations (of which 4 are rejected as outliers) from 2016-11-18.436 to 2016-11-25.873."
2016 UF101JPL Sentry1909209113.9e-08-6.03-6.030JPL: "Analysis based on 59 observations spanning 24.143 days (2016-Oct-30.06761 to 2016-Nov-23.210613)." Diameter approximately 0.150 km. from mean, weighted H=21.7.
2016 SK2JPL Sentry19092073-208142.1e-06-5.88-5.910JPL: "Analysis based on 30 observations spanning 31.977 days (2016-Sep-25.12674 to 2016-Oct-27.103638)." Diameter approximately 0.029 km. from mean, weighted H=25.3.
2016 RD34JPL Sentry19092051-2091294.6e-03-3.84-3.950JPL: "Analysis based on 76 observations spanning 72.891 days (2016-Sep-11.42997 to 2016-Nov-23.320596)." Diameter approximately 0.011 km. from mean, weighted H=27.5.

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 28 November '16

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

2012Updated Traffic Report
1909Noted that JPL Sentry has updated its 2016 RD34 risk assessment - see above
Noted that JPL Sentry has updated its 2016 SK2 risk assessment - see above
Noted that JPL Sentry has updated its 2016 UF101 risk assessment - see above
Noted that JPL Sentry has updated its 2016 WA2 risk assessment - see above
Noted that JPL Sentry has updated its 2016 WG risk assessment - see above
Noted that JPL Sentry has updated its 2016 WJ1 risk assessment - see above
Noted that JPL Sentry has posted 2016 WJ8 as an impact risk - see above
Noted that JPL Sentry has updated its 2016 WT risk assessment - see above
Noted that JPL Sentry has updated its 2016 WY risk assessment - see above
Grabbed MPEC 2016-W115 - 2016 WQ8 - see above
Grabbed MPEC 2016-W116 - 2016 WR8 - see above
1730Grabbed MPEC 2016-W107 - 2016 WH8 - see above
Grabbed MPEC 2016-W108 - 2016 WJ8 - see above
Grabbed MPEC 2016-W109 - 2016 WK8 - see above
Grabbed MPEC 2016-W110 - 2016 WL8 - see above
Grabbed MPEC 2016-W111 - 2016 WM8 - see above
Grabbed MPEC 2016-W112 - 2016 WN8 - see above
Grabbed MPEC 2016-W113 - 2016 WO8 - see above
Grabbed MPEC 2016-W114 - 2016 WP8 - see above
1702Noted that NEODyS has removed 2016 WA2 as an impact risk - see above
Noted that JPL Sentry has updated its 2016 WJ1 risk assessment - see above
Noted that JPL Sentry has updated its 2016 WN1 risk assessment - see above
Noted that NEODyS has updated its 2016 WN1 risk assessment - see above
1625Noted that JPL Sentry has updated its 2016 WA2 risk assessment - see above
Noted that JPL Sentry has updated its 2016 WF7 risk assessment - see above
Noted that JPL Sentry has updated its 2016 WG risk assessment - see above
Noted that JPL Sentry has updated its 2016 WN1 risk assessment - see above
Grabbed MPEC 2016-W105 - Daily Orbit Update - see above
Grabbed MPEC 2016-W106 - 2016 JG18 - see above
0051Noted that NEODyS has updated its 2016 WG risk assessment - see above
Noted that NEODyS has updated its 2016 WJ1 risk assessment - see above
Noted that NEODyS has removed 2016 WM1 as an impact risk - see above
Noted that NEODyS has updated its 2016 WN1 risk assessment - see above
Noted that NEODyS has updated its 2016 WQ1 risk assessment - see above
Noted that NEODyS has updated its 2016 WU risk assessment - see above
Noted that NEODyS has updated its 2016 WY risk assessment - see above