Contents  on 2 January '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 2 January '17

Two objects reported inside ten LD

There are two transient natural objects reported to be less than ten lunar distances (LD) from our home world today. NHATS target 2016 YR is outbound from 7.75 to 7.96 LD and 2016 YM3 leaves our ten-LD traffic reporting "bubble," traveling from 8.49 to 10.14 LD. No other objects are presently known to be coming that close until risk-listed NHATS target 2016 YC8 enters ten LD on January 15th.

Earth passage I D ~Size Distance Today  Notes
4.41 LD Dec. 292016 YM3 14 m  8.49 to 10.14 LD exits ten LD
7.16 LD Dec. 272016 YR 12 m  7.75 to 7.96 LD NHATS target - DOU
Approaching
7.10 LD Feb. 52013 FK 74 m  < 10 LD Feb. 2
9.1   LD Feb. 42005 VL1 13 m  < 10 LD Feb. 1, uncertainty +/- 15.00 hours, NHATS target, risk
9.40 LD Jan. 182016 YC8 41 m  < 10 LD Jan. 15, NHATS target, risk - DOU

This report was generated at 1948 UTC with follow-up in today's DOU MPEC for 2016 YC8, 2016 YR, and departed NHATS target 2016 WD7.



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 2 January '17

The MPC's NEO Confirmation Page has 41 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 41 objects listed. Of these, 37 were "one nighters." So far The Tracking News has counted a total of 46 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 2 January '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-A08 - "18:35 UT" - 2016 YE11


<< DOU on 2 Jan. '17 >>  MPEC 2017-A07 - "13:06 UT" - Daily Orbit Update

Observers  on 2 January '17

A total of 21 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 47 in MPEC 2017-A07 -- 2016 YS8, 2016 YR, 2016 YO3, 2016 YO, 2016 YN, 2016 YK, 2016 XZ23, 2016 XO23, 2016 XH1, 2016 XD1, 2016 XB2, 2016 WX9, 2016 WV, 2016 WS3, 2016 WS, 2016 WQ48, 2016 WP48, 2016 WO1, 2016 WH7, 2016 WH1, 2016 WD7, 2016 WC7, 2016 VY5, 2016 VY3, 2016 VQ5, 2016 TJ56, 2016 RP33, 2016 RG40, 2016 QF44, 2016 PZ66, 2016 NQ32, 2016 ND1, 2016 LV8, 2015 AQ45, 2014 WP201, 2014 MQ18, 2014 KU76, 2013 GF69, 2012 MJ6, 2011 FZ2, 2006 MX13, 2002 YZ3, 1999 VT, 354713, 331990, 318050, 433
621Bergisch Gladbach Obs. in Germany, 1 in MPEC 2017-A08 -- 2016 YE11
C77Bernezzo Obs. in Italy, 1 in MPEC 2017-A08 -- 2016 YE11
300Bisei Spaceguard Center in Japan, 1 in MPEC 2017-A08 -- 2016 YE11
160Castelmartini Obs. in Italy, 20 in MPEC 2017-A07 -- 2016 VY5, 2016 PZ66, 2008 UL90, 2002 XP37, 2001 YE4, 468583, 452389, 378610, 378124, 36236, 347813, 345705, 24445, 7341, 7088, 5587, 5131, 4179, 3200, 433
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPEC 2017-A07 -- 2016 YJ3, 2016 YF8
K78Iota Scorpii Obs., 2 in MPEC 2017-A07 -- 2016 PZ66, 275611
246KLENOT in the Czech Republic, 10 in MPEC 2017-A07 -- 2016 YT8, 2016 YK, 2016 YC8, 2016 XD1, 2016 PZ66, 2016 NL15, 2014 ME19, 2011 YG6, 2002 XP37, 2001 YE4
K38M57 Obs. in Italy, 1 in MPEC 2017-A08 -- 2016 YE11
474Mt. John Obs. in New Zealand, 5 in MPEC 2017-A07 -- 2016 YW7, 2016 YM1, 2016 YF8, 2016 XO23, 2016 VR5
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2017-A07 & 2017-A08 -- 2016 YE11, 2016 TF94
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2017-A07 -- 2016 NL15
J43Oukaimeden Obs. in Morocco, 2 in MPECs 2017-A07 & 2017-A08 -- 2016 YE11, 13651
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2017-A07 -- 2016 TF94
A53Peschiera del Garda Obs. in Italy, 5 in MPEC 2017-A07 -- 2016 YN4, 2016 UE101, 2016 PZ66, 2016 PR8, 2016 NL15
033Schwarzschild Obs. in Germany, 5 in MPECs 2017-A07 & 2017-A08 -- 2016 YR, 2016 YE11, 2016 YC8, 2016 YB8, 2016 YB11
587Sormano Obs. in Italy, 1 in MPEC 2017-A08 -- 2016 YE11
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2017-A08 -- 2016 YE11
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2017-A07 -- 2016 YZ10
G33Wickede Obs. in Germany, 1 in MPEC 2017-A07 -- 2102
I15Wishing Star Obs. in Rhode Island, 2 in MPEC 2017-A07 -- 2016 AU8, 2008 UL90
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 January '17

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 YC8NEODyS23582045-208921.2e-09-8.98-9.060NEODyS: "Based on 56 optical observations (of which 0 are rejected as outliers) from 2016-12-27.359 to 2017-01-01.930."

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 2 January '17

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

2358Noted that NEODyS has updated its 2016 YC8 risk assessment - see above
1948Generated Traffic Report
1919Grabbed MPEC 2017-A08 - 2016 YE11 - see above
1723Grabbed MPEC 2017-A07 - Daily Orbit Update - see above