Contents  on 29 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 29 November '16

Eleven objects reported inside ten LD

There are eleven asteroidal objects known to be less than ten lunar distances (LD) from Earth today. Nearest is NHATS target 2016 WQ3, which enters our planet's SOI (sphere of gravitational influence), coming in from 2.62 to 2.03 LD. Much further away, newly announced 2016 WZ8 from 4.60 to 4.24 LD and four objects leave our ten-LD traffic reporting zone: intruder 2016 WW2 exits from 8.39 to 10.53 LD, 2016 WR8 from 8.63 to 10.56 LD, 2016 WA8 from 8.99 to 10.59 LD, and 2016 WV2 from 9.10 to 10.34 LD.

Earth passage I D ~Size Distance Today  Notes
0.35 LD Nov. 252016 WW2 5 m  8.39 to 10.53 LD exits ten LD, intruder
1.46 LD Nov. 252016 WU2 11 m  6.62 to 8.26 LD NHATS target
1.48 LD Dec. 12016 WQ3 6 m  2.03 from 2.62 LD enters Earth SOI, NHATS target
1.73 LD Nov. 172016 WY 5 m  8.43 to 9.12 LD Moon buzzer, NHATS target, risk - DOU
2.61 LD Dec. 12016 WG7 22 m  3.58 from 4.71 LD NHATS target - DOU
4.15 LD tomorrow2016 WZ8 8 m  4.24 from 4.60 LD NEW - MPEC
4.18 LD Dec. 62016 WD7 12 m  5.80 from 6.25 LD NHATS target
4.45 LD tomorrow2016 WQ 26 m  4.66 from 6.29 LD
6.48 LD Nov. 262016 WR8 11 m  8.63 to 10.56 LD exits ten LD
6.69 LD Nov. 252016 WV2 18 m  9.10 to 10.34 LD exits ten LD
8.31 LD Nov. 272016 WA8 38 m  8.99 to 10.59 LD exits ten LD - DOU
Approaching
3.61 LD Dec. 52016 WB8 23 m  < 10 LD tomorrow, NHATS target - DOU
5.1   LD Dec. 82016 WQ8 39 m  < 10 LD Dec. 6, uncertainty +/- 17 mins.
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 2014 UTC with new discovery 2016 WZ8 (MPEC) and to note first follow-up for 2016 WA8 and departed NHATS target 2016 WT7 in today's DOU MPEC along with continuing follow-up for 2016 WB8, 2016 WG7, and 2016 WY, plus astrometry for departed NHATS target 2016 VU5. Your first nearby small bodies traffic report was generated at 0546 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 29 November '16

The MPC's NEO Confirmation Page has 57 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 57 objects listed. Of these, 31 were "one nighters." So far The Tracking News has counted a total of 70 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 29 November '16

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 2016-W124 - "18:32 UT" - 2016 WB9


MPEC 2016-W123 - "18:29 UT" - 2016 WZ8


MPEC 2016-W122 - "18:27 UT" - 2016 WA9


MPEC 2016-W121 - "18:24 UT" - 2016 WY8


MPEC 2016-W120 - "18:21 UT" - 2016 WX8


MPEC 2016-W119 - "16:04 UT" - 2015 ME54


MPEC 2016-W118 - "16:02 UT" - 2010 XO56


<< DOU on 29 Nov. '16 >>  MPEC 2016-W117 - "13:06 UT" - Daily Orbit Update

Observers  on 29 November '16

A total of 26 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 8 in MPECs 2016-W117 & 2016-W123 -- 2016 WZ8, 2016 VU5, 2016 UY25, 2016 UL5, 2016 UA41, 2016 RY40, 2016 RB18, 2016 QK44
300Bisei Spaceguard Center in Japan, 1 in MPEC 2016-W123 -- 2016 WZ8
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2016-W117, 2016-W118 & 2016-W122 -- 2016 WA9, 2016 VX2, 2016 SF17, 2010 XO56
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 10 in MPECs 2016-W117, 2016-W119 & 2016-W124 -- 2016 WU3, 2016 WS3, 2016 WP3, 2016 WN1, 2016 WJ1, 2016 WB9, 2016 VQ5, 2016 VQ4, 2016 UF101, 2015 ME54
734Farpoint Obs. in Kansas, 1 in MPEC 2016-W117 -- 2016 WT7
J95Great Shefford Obs. in England, 2 in MPECs 2016-W121 & 2016-W123 -- 2016 WZ8, 2016 WY8
A17Guidestar Obs. in Germany, 4 in MPEC 2016-W117 -- 2016 WV, 2016 WO1, 2016 WJ1, 2016 WB8
Q60ISON Siding Spring Obs. in New South Wales, 1 in MPEC 2016-W117 -- 462775
K92LCOGT Sutherland B in South Africa, 1 in MPEC 2016-W117 -- 2016 WT7
K93LCOGT Sutherland C in South Africa, 1 in MPEC 2016-W117 -- 2016 WG7
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2016-W120, 2016-W121 & 2016-W123 -- 2016 WZ8, 2016 WY8, 2016 WX8
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2016-W120, 2016-W121, 2016-W122 & 2016-W123 -- 2016 WZ8, 2016 WY8, 2016 WX8, 2016 WA9
Z80Northolt Branch Obs. in England, 1 in MPEC 2016-W117 -- 2016 WJ1
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2016-W117 -- 2014 WL368
F51Pan-STARRS 1 (PS1) in Hawaii, 18 in MPECs 2016-W117, 2016-W121, 2016-W122 & 2016-W124 -- 2016 WY8, 2016 WO7, 2016 WC7, 2016 WB9, 2016 WA9, 2014 SZ303, 2013 GF69, 2012 VN82, 2012 LU7, 2009 WL1, 2009 KL2, 90416, 474613, 418094, 326683, 164120, 136635, 1221
L04ROASTERR-1 in Romania, 4 in MPEC 2016-W117 -- 2016 WG7, 2016 WA8, 2006 UM, 2005 TF
K61Rokycany Obs. in the Czech Republic, 1 in MPEC 2016-W117 -- 2016 WJ1
033Schwarzschild Obs. in Germany, 6 in MPECs 2016-W117, 2016-W120, 2016-W121, 2016-W122 & 2016-W124 -- 2016 WY8, 2016 WX8, 2016 WO8, 2016 WN8, 2016 WB9, 2016 WA9
K14Sencelles Obs. in Spain, 1 in MPEC 2016-W117 -- 5143
W885M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2016-W117 -- 163249
W887program code 7 via Slooh.com Chile Obs. in Chile, 1 in MPEC 2016-W117 -- 2016 WJ1
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2016-W121 -- 2016 WY8
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2016-W120 -- 2016 WX8
I52Steward Obs. Mt. Lemmon Station in Arizona, 3 in MPECs 2016-W120, 2016-W121 & 2016-W123 -- 2016 WZ8, 2016 WY8, 2016 WX8
926Tenagra II Obs. in Arizona, 3 in MPECs 2016-W120, 2016-W121 & 2016-W123 -- 2016 WZ8, 2016 WY8, 2016 WX8
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPEC 2016-W117 -- 2016 WY, 2016 WJ8, 2016 WA2, 2016 UF101
I15Wishing Star Obs. in Rhode Island, 3 in MPEC 2016-W117 -- 2016 VY5, 2006 UM, 16816
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 November '16

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL 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 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 Sentry18002023-2113602.6e-07-3.12-3.740JPL: "Analysis based on 29 observations spanning 4.9636 days (2016-Nov-24.24332 to 2016-Nov-29.20688)." Diameter approximately 0.764 km. from mean, weighted H=18.2.
NEODyS17012023-2113652.31e-07-3.21-3.920NEODyS #2 for the day: "Based on 30 optical observations (of which 1 are rejected as outliers) from 2016-11-24.244 to 2016-11-29.208."
2016 WF7NEODyS16142088-211581.17e-06-8.12-8.50NEODyS: "Based on 23 optical observations (of which 2 are rejected as outliers) from 2016-11-24.317 to 2016-11-26.974."
2016 WA2JPL Sentry1731R E M O V E DJPL: Risk listing removed at 1702 UTC.
2016 WN1JPL Sentry1701211212.3e-05-4.95-4.950JPL: "Analysis based on 37 observations spanning 9.6998 days (2016-Nov-19.26009 to 2016-Nov-28.95986)." Diameter approximately 0.030 km. from mean, weighted H=25.3.
NEODyS1614211223.37e-05-4.78-4.780NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2016-11-19.261 to 2016-11-28.961."
2016 WJ1NEODyS22052030-21141272.35e-04-1.70-2.051NEODyS #2 for the day: "Based on 136 optical observations (of which 0 are rejected as outliers) from 2016-11-19.466 to 2016-11-29.203."
JPL Sentry17312030-2114732.4e-04-1.69-2.051JPL: "Analysis based on 136 observations spanning 9.7367 days (2016-Nov-19.46522 to 2016-Nov-29.20193)." Diameter approximately 0.180 km. from mean, weighted H=21.3.
2016 WYJPL Sentry17312091-2114119.7e-05-6.49-6.600JPL: "Analysis based on 29 observations spanning 9.9848 days (2016-Nov-19.26009 to 2016-Nov-29.244925)." Diameter approximately 0.005 km. from mean, weighted H=29.2.
NEODyS16142077-2116389.76e-05-6.48-6.650NEODyS: "Based on 43 optical observations (of which 4 are rejected as outliers) from 2016-11-19.261 to 2016-11-29.246."
2016 WGNEODyS16142076-2115474.53e-06-4.38-5.180NEODyS: "Based on 138 optical observations (of which 4 are rejected as outliers) from 2016-11-18.436 to 2016-11-25.873."
2016 UF101NEODyS1614209112.26e-08-6.25-6.250NEODyS: "Based on 68 optical observations (of which 4 are rejected as outliers) from 2016-10-30.068 to 2016-11-28.887."
JPL Sentry1800R E M O V E DJPL #2 for the day: Risk listing removed at 1758 UTC.

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 29 November '16

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

2205Noted that NEODyS has updated its 2016 WJ1 risk assessment - see above
2014Updated Traffic Report
1835Grabbed MPEC 2016-W120 - 2016 WX8 - see above
Grabbed MPEC 2016-W121 - 2016 WY8 - see above
Grabbed MPEC 2016-W122 - 2016 WA9 - see above
Grabbed MPEC 2016-W123 - 2016 WZ8 - see above
Grabbed MPEC 2016-W124 - 2016 WB9 - see above
1800Noted that JPL Sentry has removed 2016 UF101 as an impact risk - see above
Noted that JPL Sentry has updated its 2016 WJ8 risk assessment - see above
1731Noted that JPL Sentry 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 WY risk assessment - see above
1701Noted that JPL Sentry has updated its 2016 UF101 risk assessment - see above
Noted that NEODyS has updated its 2016 WJ8 risk assessment - see above
Noted that JPL Sentry has updated its 2016 WN1 risk assessment - see above
1614Noted that NEODyS has updated its 2016 UF101 risk assessment - see above
Noted that NEODyS has updated its 2016 WF7 risk assessment - see above
Noted 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 posted 2016 WJ8 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 WY risk assessment - see above
Grabbed MPEC 2016-W117 - Daily Orbit Update - see above
Grabbed MPEC 2016-W118 - 2010 XO56 - see above
Grabbed MPEC 2016-W119 - 2015 ME54 - see above