Contents  on 6 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 6 January '17

Two objects reported inside ten LD

Two transient natural objects are reported flying inside ten lunar distances (LD) of our home world today. Within Earth's SOI (sphere of gravitational influence), inbound tiny NHATS target 2017 AZ3 comes its closest to the Moon on this passage -- 1.80 LD at 1958 UTC. Further out, NHATS target 2016 YR is headed away from 8.70 to 8.98 LD. Next known to be coming into the neighborhood, risk-listed NHATS target 2016 YC8 arrives inside ten LD on January 15th.

This report was generated at 1850 UTC with new discovery 2017 AZ3 (MPEC) and with follow-up in today's DOU MPEC for 2017 AE3.



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 6 January '17

The MPC's NEO Confirmation Page has 81 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 81 objects listed. Of these, 37 were "one nighters." The Tracking News counted a total of 104 listings on the NEOCP on this day.

New MPECs  on 6 January '17

Minor Planet Electronic Circulars

There were thirteen MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2017-A40 - "23:58 UT" - 2017 AO4


MPEC 2017-A39 - "23:55 UT" - 2017 AN4


MPEC 2017-A38 - "23:51 UT" - 2017 AM4


MPEC 2017-A37 - "23:48 UT" - 2017 AL4


MPEC 2017-A36 - "23:44 UT" - 2017 AK4


MPEC 2017-A35 - "23:02 UT" - Comet C/2016 U1 (Neowise)


MPEC 2017-A34 - "18:36 UT" - 2016 OZ2 = 2014 MQ67


MPEC 2017-A33 - "18:27 UT" - 2012 AW


MPEC 2017-A32 - "17:11 UT" - Comet P/2017 A2 = 2011 A5 (Panstarrs)


MPEC 2017-A31 - "15:14 UT" - Comet C/2017 A1 (Panstarrs)


MPEC 2017-A30 - "14:30 UT" - 2016 YB13


<< DOU on 6 Jan. '17 >>  MPEC 2017-A29 - "13:08 UT" - Daily Orbit Update


MPEC 2017-A28 - "03:40 UT" - 2017 AZ3

Observers  on 6 January '17

A total of 51 observers appeared in this day's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2017-A35 -- C/2016 U1
705"Kristie Nault via Apache Point Obs. in New Mexico, 12 in MPEC 2017-A29 -- 2016 YZ10, 2016 YY7, 2016 YQ8, 2016 YL4, 2016 YL3, 2016 YF11, 2016 WB10, 2016 QC84, 2014 LQ25, 2014 BG3, 2012 AN23, 2009 FR30
E23Arcadia Obs. in New South Wales, 1 in MPEC 2017-A31 -- C/2017 A1
H21Astronomical Research Obs. Westfield in Illinois, 8 in MPEC 2017-A29 -- 2016 YY, 2016 XB2, 2016 WS, 2016 VY5, 2016 NL15, 2014 UU34, 4179, 433
T05ATLAS Haleakala in Hawaii, 9 in MPECs 2017-A29 & 2017-A31 -- 2017 AE3, C/2017 A1, 2016 LM8, 2014 AD17, 2005 TF, 378610, 226198, 138859, 13651
I47Auger Obs. in Argentina, 1 in MPEC 2017-A31 -- C/2017 A1
K46Bamberg Obs. in Germany, 1 in MPEC 2017-A29 -- 4179
B88Bigmuskie Obs. in Italy, 1 in MPEC 2017-A29 -- 2016 PZ66
B96Brixiis Obs. in Belgium, 1 in MPEC 2017-A35 -- C/2016 U1
215Buchloe Obs. in Germany, 1 in MPEC 2017-A35 -- C/2016 U1
W96Campo Catino Austral Obs. (CAO) in Chile, 2 in MPECs 2017-A31 & 2017-A32 -- P/2017 A2, C/2017 A1
160Castelmartini Obs. in Italy, 7 in MPEC 2017-A29 -- 2016 PZ66, 2016 NL15, 467963, 250458, 203217, 16834, 3352
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2017-A29 -- 2016 YZ10, 2016 PZ66
107Cavezzo Obs. in Italy, 5 in MPEC 2017-A29 -- 326683, 138846, 5693, 5131, 3103
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPECs 2017-A29, 2017-A30, 2017-A31, 2017-A36, 2017-A37 & 2017-A38 -- 2017 AM4, 2017 AL4, 2017 AK4, C/2017 A1, 2016 YQ, 2016 YN1, 2016 YG8, 2016 YB13, 2016 XJ2, 2016 WX8
A77Chante-Perdrix Obs. in France, 2 in MPECs 2017-A31 & 2017-A35 -- C/2017 A1, C/2016 U1
J01Cielo Profundo Obs. in Spain, 1 in MPEC 2017-A35 -- C/2016 U1
Z45Cosmos Obs., 3 in MPEC 2017-A29 -- 138846, 5653, 1627
K02Eastwood Obs. in England, 1 in MPEC 2017-A35 -- C/2016 U1
595Farra d'Isonzo Obs. in Italy, 3 in MPECs 2017-A28, 2017-A31 & 2017-A40 -- 2017 AZ3, 2017 AO4, C/2017 A1
372Geisei Obs. in Japan, 1 in MPEC 2017-A35 -- C/2016 U1
J95Great Shefford Obs. in England, 1 in MPEC 2017-A40 -- 2017 AO4
Q60ISON Siding Spring Obs. in New South Wales, 1 in MPEC 2017-A29 -- 106589
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-A35 -- C/2016 U1
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2017-A31 & 2017-A32 -- P/2017 A2, C/2017 A1
Q622Marian Urbanik in Slovakia via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-A31 -- C/2017 A1
Q626Erik Bryssinck in Belgium via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-A31 -- C/2017 A1
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2017-A29 & 2017-A31 -- C/2017 A1, 369264
D95Kurihara Obs. in Japan, 1 in MPEC 2017-A35 -- C/2016 U1
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2017-A38 -- 2017 AM4
K92LCOGT Sutherland B in South Africa, 1 in MPEC 2017-A31 -- C/2017 A1
C10Maisoncelles Obs. in France, 2 in MPECs 2017-A32 & 2017-A35 -- P/2017 A2, C/2016 U1
568_Marco Micheli on Mauna Kea in Hawaii, 6 in MPECs 2017-A30, 2017-A31, 2017-A32, 2017-A37, 2017-A38 & 2017-A39 -- 2017 AN4, 2017 AM4, 2017 AL4, P/2017 A2, C/2017 A1, 2016 YB13
213Montcabre Obs. in Spain, 1 in MPEC 2017-A35 -- C/2016 U1
474Mt. John Obs. in New Zealand, 2 in MPECs 2017-A30 & 2017-A36 -- 2017 AK4, 2016 YB13
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2017-A28, 2017-A29, 2017-A32 & 2017-A40 -- 2017 AZ3, 2017 AO4, P/2017 A2, 2016 XH2, P/2011 A5
K74Muensterschwarzach Obs. in Germany, 1 in MPEC 2017-A29 -- 370307
D81Nagano Obs. in Japan, 1 in MPEC 2017-A35 -- C/2016 U1
Z80Northolt Branch Obs. in England, 3 in MPEC 2017-A29 -- 2016 NL15, 2014 AD17, 468583
B69Owls & Ravens Obs. in Germany, 1 in MPEC 2017-A35 -- C/2016 U1
F51Pan-STARRS 1 (PS1) in Hawaii, 11 in MPECs 2017-A29, 2017-A30, 2017-A31, 2017-A32, 2017-A36, 2017-A37, 2017-A38 & 2017-A39 -- 2017 AN4, 2017 AM4, 2017 AL4, 2017 AK4, P/2017 A2, C/2017 A1, 2016 YB13, 2014 WL368, P/2011 A5, 143624, 138175
W25RMS Obs., 4 in MPEC 2017-A29 -- 2017 AE3, 2016 YK, 275611, 138859
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2017-A28 -- 2017 AZ3
B00Savigny-le-Temple Obs., 1 in MPEC 2017-A35 -- C/2016 U1
204Schiaparelli Obs. in Italy, 1 in MPEC 2017-A28 -- 2017 AZ3
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-A35 -- C/2016 U1
W887program code 7 via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-A29 -- 143624
G45Space Surveillance Telescope Atom Site in New Mexico, 1 in MPEC 2017-A29 -- 203471
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2017-A29 -- 2016 YO3
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2017-A30 & 2017-A40 -- 2017 AO4, 2016 YB13
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2017-A40 -- 2017 AO4
I52Steward Obs. Mt. Lemmon Station in Arizona, 3 in MPECs 2017-A28, 2017-A29 & 2017-A40 -- 2017 AZ3, 2017 AO4, 2016 XH2
926Tenagra II Obs. in Arizona, 16 in MPECs 2017-A29, 2017-A31, 2017-A33, 2017-A34, 2017-A38, 2017-A39 & 2017-A40 -- 2017 AO4, 2017 AN4, 2017 AM4, 2017 AF3, 2017 AE3, C/2017 A1, 2016 XZ23, 2016 XT1, 2016 XB18, 2016 UJ31, 2016 OZ2, 2012 AW, 2010 AG40, 85990, 378124, 275611
C42Xingming Obs. in China, 1 in MPEC 2017-A40 -- 2017 AO4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 January '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: JPL at 2359 and NEODyS at 2326 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 YYNEODyS1730210112.43e-11-10.95-10.950NEODyS: "Based on 45 optical observations (of which 4 are rejected as outliers) from 2016-12-18.153 to 2017-01-04.437."
2005 NX55JPL Sentry05382018-2107722.2e-08-5.17-5.850JPL: "Analysis based on 15 observations spanning 1.1343 days (2005-Jul-11.16281 to 2005-Jul-12.297115)." Diameter approximately 0.142 km. from mean, weighted H=21.9.

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 6 January '17

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

2359Grabbed MPEC 2017-A36 - 2017 AK4 - see above
Grabbed MPEC 2017-A37 - 2017 AL4 - see above
Grabbed MPEC 2017-A38 - 2017 AM4 - see above
Grabbed MPEC 2017-A39 - 2017 AN4 - see above
Grabbed MPEC 2017-A40 - 2017 AO4 - see above
2326Grabbed MPEC 2017-A35 - Comet C/2016 U1 (Neowise) - see above
1900Grabbed MPEC 2017-A34 - 2016 OZ2 = 2014 MQ67 - see above
1850Generated Traffic Report
1830Grabbed MPEC 2017-A33 - 2012 AW - see above
1730Noted that NEODyS has updated its 2016 YY risk assessment - see above
Grabbed MPEC 2017-A29 - Daily Orbit Update - see above
Grabbed MPEC 2017-A30 - 2016 YB13 - see above
Grabbed MPEC 2017-A31 - Comet C/2017 A1 (Panstarrs) - see above
Grabbed MPEC 2017-A32 - Comet P/2017 A2 = 2011 A5 (Panstarrs) - see above
0538Noted that JPL Sentry has updated its 2005 NX55 risk assessment - see above
Grabbed MPEC 2017-A28 - 2017 AZ3 - see above