Contents  on 19 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 19 January '17

One object reported inside ten LD

Just one asteroidal object is reported traveling inside ten lunar distances (LD) of Earth today. NHATS target 2016 YC8 is outbound from 9.55 to 9.85 LD. Up next, risk-listed NHATS target 2005 VL1 comes inside ten LD on February 1st and 2013 FK enters on the 2nd.

This report was generated at 1950 UTC with first follow-up for departed 2016 YM3 (1.10 days added last month to 2.76-day discovery arc) in today's DOU MPEC along with follow-up for 2016 YC8 and, from December, observation of NHATS targets 2017 AG5 and 2016 XR23, as well as distant 1995 CR. We also note the numbering of 478784 2012 UV136, most recently observed last summer.



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. "Distant" is used here to describe an object that has come within ten LD since A/CC began these traffic reports (2007) but is not presently so close. 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.

Radar Astrometry  on 19 January '17

Radar observation of two objects

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 2330 UTC when the database was dated 19 Jan.


Data update noted at 2359 UTC when the database was dated 19 Jan.

NEOCP Activity  on 19 January '17

The MPC's NEO Confirmation Page has 43 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 43 objects listed. Of these, nine were "one nighters." So far The Tracking News has counted a total of 45 listings on the NEOCP today.

New MPECs  on 19 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-B24 - "20:06 UT" - 2017 BK


<< DOU on 19 Jan. '17 >>  MPEC 2017-B23 - "13:01 UT" - Daily Orbit Update

Observers  on 19 January '17

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

CodeObserver / observatory
251Arecibo in Puerto Rico, 2 in radar -- 85990, 265482
T05ATLAS Haleakala in Hawaii, 12 in MPEC 2017-B23 -- 2017 AG5, 2017 AF5, 2011 WO41, 54789, 385343, 34613, 248083, 22753, 137925, 13651, 5693, 1036
300Bisei Spaceguard Center in Japan, 1 in MPEC 2017-B24 -- 2017 BK
160Castelmartini Obs. in Italy, 4 in MPEC 2017-B23 -- 479325, 257838, 3200, 433
703Catalina Sky Survey (CSS) in Arizona, 6 in MPEC 2017-B23 -- 2016 VT2, 2013 NX23, 2005 YS165, 2001 QE34, 345705, 1943
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2017-B23 -- 2017 AC5
958Dax Obs. in France, 1 in MPEC 2017-B24 -- 2017 BK
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2017-B24 -- 2017 BK
J95Great Shefford Obs. in England, 2 in MPECs 2017-B23 & 2017-B24 -- 2017 BK, 2016 YC8
H15ISON New Mexico Obs. in New Mexico, 1 in MPEC 2017-B23 -- 2005 TF
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-B24 -- 2017 BK
I896program code 6 via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2017-B24 -- 2017 BK
Q625Cristovao Jacques in Brazil via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-B23 -- 2001 QE34
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2017-B23 -- 265482
K92LCOGT Sutherland B in South Africa, 1 in MPEC 2017-B23 -- 265482
Z21LCOGT Tenerife Aqawan A#1 in the Canary Islands, 2 in MPECs 2017-B23 & 2017-B24 -- 2017 BK, 265482
K38M57 Obs. in Italy, 1 in MPEC 2017-B23 -- 2016 YT8
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2017-B23 -- 108519
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2017-B23 -- 2017 AG5, 2012 BX13
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2017-B23 -- 2001 QE34
Z80Northolt Branch Obs. in England, 2 in MPECs 2017-B23 & 2017-B24 -- 2017 BK, 2017 AG5
408Nyukasa Obs. in Japan, 1 in MPEC 2017-B24 -- 2017 BK
C23Olmen Obs. in Belgium, 1 in MPEC 2017-B24 -- 2017 BK
L04ROASTERR-1 in Romania, 3 in MPECs 2017-B23 & 2017-B24 -- 2017 BK, 2016 UU80, 2001 QE34
H36Sandlot Obs. in Kansas, 1 in MPEC 2017-B24 -- 2017 BK
204Schiaparelli Obs. in Italy, 21 in MPECs 2017-B23 & 2017-B24 -- 2017 BK, 2016 YO3, 2016 YN4, 2016 YM4, 2016 YM3, 2016 YL4, 2016 XR23, 2016 XQ23, 2016 XM, 2016 XD2, 2016 XA21, 2016 WX9, 2016 WL8, 2016 TY92, 2015 XT168, 2013 YE38, 2012 AE3, 1995 CR, 482250, 480922, 480883
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-B23 -- 2017 AF5
G45Space Surveillance Telescope Atom Site (SST Atom Site) in New Mexico, 13 in MPEC 2017-B23 -- 2016 YM, 2016 WO1, 2014 ME19, 96590, 226198, 185851, 171819, 171576, 152563, 141052, 5836, 3838, 1221
691Spacewatch 0.9m telescope in Arizona, 9 in MPEC 2017-B23 -- 2016 XZ23, 2016 XH2, 2016 XD1, 2016 SH45, 2014 YE35, 2005 ML13, 2001 QE34, 418094, 229007
291Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2017-B23 -- 2017 AJ3, 2016 YW7, 2016 YP4, 2016 XM, 2016 WF9, 2016 NG33, 2014 DP7
W34Squirrel Valley Obs. in North Carolina, 2 in MPEC 2017-B23 -- 12923, 2102
C36Starry Wanderer Obs. in Belarus, 1 in MPEC 2017-B23 -- 4179
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2017-B24 -- 2017 BK
926Tenagra II Obs. in Arizona, 1 in MPEC 2017-B23 -- 2017 AB17
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-B23 -- 2013 YZ37
C51WISE in Earth polar orbit, 6 in MPEC 2017-B23 -- 2016 SH45, 452389, 370307, 20460, 4954, 3352
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 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
2017 AP4NEODyS1654211514.03e-07-7.69-7.690NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2017-01-04.487 to 2017-01-09.349."
2017 AM4JPL Sentry16542024-2115211.7e-05-0.65-0.651JPL: "Analysis based on 27 observations spanning 14.771 days (2017-Jan-03.5207 to 2017-Jan-18.2915)." Diameter approximately 0.500 km. from mean, weighted H=19.2.
NEODyS16542024-2115256.14e-06-1.12-1.121NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2017-01-03.522 to 2017-01-18.292."

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 19 January '17

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

2359Noted Radar Astrometry database update - see above
2330Noted Radar Astrometry database update - see above
2031Grabbed MPEC 2017-B24 - 2017 BK - see above
1950Generated Traffic Report
1654Noted that JPL Sentry has updated its 2017 AM4 risk assessment - see above
Noted that NEODyS has updated its 2017 AM4 risk assessment - see above
Noted that NEODyS has updated its 2017 AP4 risk assessment - see above
Grabbed MPEC 2017-B23 - Daily Orbit Update - see above