Contents  on 21 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 21 January '17

No objects reported inside ten LD

Today there are no objects reported passing less than ten lunar distances (LD) from Earth. Headed our way next, risk-listed NHATS target 2005 VL1 comes inside ten LD on February 1st, and 2013 FK arrives a day later, while newly announced 2017 BW is calculated with some uncertainty to enter on February 9th for a transit lasting a couple weeks.

This report was generated at 2226 UTC with new discovery 2017 BW (MPEC) and with follow-up in today's DOU MPEC for departed NHATS target 2017 AG5.



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.

Radar Astrometry  on 21 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 0027 UTC when the database was dated 20 Jan.


Data update noted at 0100 UTC when the database was dated 20 Jan.

NEOCP Activity  on 21 January '17

The MPC's NEO Confirmation Page has 51 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 51 objects listed. Of these, 20 were "one nighters." So far The Tracking News has counted a total of 69 listings on the NEOCP today.

New MPECs  on 21 January '17

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been twelve MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2017-B38 - "23:53 UT" - 2017 BY


MPEC 2017-B37 - "23:50 UT" - 2017 BX


MPEC 2017-B36 - "23:47 UT" - 2017 AQ20


MPEC 2017-B35 - "21:12 UT" - 2008 SD


MPEC 2017-B34 - "19:42 UT" - 2017 BW


MPEC 2017-B33 - "19:39 UT" - 2017 BV


MPEC 2017-B32 - "19:36 UT" - 2017 BU


MPEC 2017-B31 - "19:33 UT" - 2017 BT


MPEC 2017-B30 - "19:31 UT" - 2017 BS


MPEC 2017-B29 - "19:28 UT" - 2017 AP20


MPEC 2017-B28 - "19:25 UT" - 2017 AO20


<< DOU on 21 Jan. '17 >>  MPEC 2017-B27 - "13:02 UT" - Daily Orbit Update

Observers  on 21 January '17

A total of 39 observers appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 2 in radar -- 481457, 5143
T05ATLAS Haleakala in Hawaii, 3 in MPEC 2017-B27 -- 2017 AO13, 438955, 10150
X13Bosque Alegre Obs. Remote in Argentina, 1 in MPEC 2017-B30 -- 2017 BS
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 5 in MPECs 2017-B27 & 2017-B30 -- 2017 BS, 2016 VY5, 2016 TE93, 2016 OJ, 2016 NV
958Dax Obs. in France, 1 in MPEC 2017-B31 -- 2017 BT
595Farra d'Isonzo Obs. in Italy, 4 in MPECs 2017-B31, 2017-B33, 2017-B34 & 2017-B37 -- 2017 BX, 2017 BW, 2017 BV, 2017 BT
203GiaGa Obs. in Italy, 3 in MPECs 2017-B27, 2017-B31 & 2017-B34 -- 2017 BW, 2017 BT, 2017 AG5
K88GINOP-KHK, 8 in MPECs 2017-B29, 2017-B31, 2017-B32, 2017-B33, 2017-B34, 2017-B36, 2017-B37 & 2017-B38 -- 2017 BY, 2017 BX, 2017 BW, 2017 BV, 2017 BU, 2017 BT, 2017 AQ20, 2017 AP20
J95Great Shefford Obs. in England, 8 in MPECs 2017-B29, 2017-B31, 2017-B32, 2017-B33, 2017-B35, 2017-B36, 2017-B37 & 2017-B38 -- 2017 BY, 2017 BX, 2017 BV, 2017 BU, 2017 BT, 2017 AQ20, 2017 AP20, 2008 SD
I67Hartley Wintney Obs. in England, 1 in MPEC 2017-B31 -- 2017 BT
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2017-B29 & 2017-B34 -- 2017 BW, 2017 AP20
246KLENOT in the Czech Republic, 14 in MPECs 2017-B27, 2017-B31 & 2017-B38 -- 2017 BY, 2017 BT, 2017 AG5, 2016 YT8, 2016 YN4, 2016 XD1, 2016 UU80, 2016 QN11, 2016 NL15, 2016 LM8, 2014 AD17, 2006 OH15, 2001 QE34, 480984
W86LCOGT Cerro Tololo B in Chile, 2 in MPEC 2017-B27 -- 265482, 192559
K92LCOGT Sutherland B in South Africa, 4 in MPECs 2017-B27, 2017-B28 & 2017-B30 -- 2017 BS, 2017 AO20, 265482, 192559
K93LCOGT Sutherland C in South Africa, 4 in MPECs 2017-B27, 2017-B28, 2017-B34 & 2017-B38 -- 2017 BY, 2017 BW, 2017 AO20, 192559
Z21LCOGT Tenerife Aqawan A#1 in the Canary Islands, 1 in MPEC 2017-B29 -- 2017 AP20
K38M57 Obs. in Italy, 1 in MPEC 2017-B29 -- 2017 AP20
K95MASTER-II Sutherland in South Africa, 4 in MPEC 2017-B27 -- 2014 AD17, 34613, 22753, 144861
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2017-B27 -- 2016 VY3, 2005 TF
118Modra Obs. in Slovakia, 1 in MPEC 2017-B31 -- 2017 BT
474Mt. John Obs. in New Zealand, 6 in MPECs 2017-B27, 2017-B28, 2017-B30 & 2017-B34 -- 2017 BW, 2017 BS, 2017 AO20, 2016 YF8, 2016 VS5, 2016 JG18
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2017-B31, 2017-B32 & 2017-B33 -- 2017 BV, 2017 BU, 2017 BT
K74Muensterschwarzach Obs. in Germany, 4 in MPEC 2017-B27 -- 2017 AG5, 2017 AF5, 5693, 4179
J69North Obs. in England, 1 in MPEC 2017-B27 -- 2017 BK
Z80Northolt Branch Obs. in England, 5 in MPEC 2017-B27 -- 2017 AO13, 2014 EW24, 2001 QE34, 438955, 349507
J43Oukaimeden Obs. in Morocco, 2 in MPEC 2017-B27 -- 382406, 22753
F51Pan-STARRS 1 (PS1) in Hawaii, 23 in MPECs 2017-B27, 2017-B28, 2017-B30, 2017-B37 & 2017-B38 -- 2017 BY, 2017 BX, 2017 BS, 2017 AV3, 2017 AO20, 2016 XA24, 2016 WP48, 2016 WC7, 2016 PR38, 2015 BA92, 2012 AE3, 2002 XU66, 54789, 54401, 481543, 414903, 413002, 349507, 274855, 242147, 143947, 138846, 2608
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 12 in MPEC 2017-B27 -- 2017 AG5, 2016 YT8, 2016 UU80, 2016 QN11, 2016 NL15, 2014 EW24, 2014 AD17, 2006 OH15, 85990, 347813, 138846, 2102
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2017-B31, 2017-B32, 2017-B33 & 2017-B38 -- 2017 BY, 2017 BV, 2017 BU, 2017 BT
204Schiaparelli Obs. in Italy, 4 in MPECs 2017-B31, 2017-B33, 2017-B34 & 2017-B38 -- 2017 BY, 2017 BW, 2017 BV, 2017 BT
W885M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-B27 -- 2014 MP41
587Sormano Obs. in Italy, 3 in MPECs 2017-B31, 2017-B32 & 2017-B34 -- 2017 BW, 2017 BU, 2017 BT
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2017-B36 -- 2017 AQ20
W34Squirrel Valley Obs. in North Carolina, 2 in MPEC 2017-B27 -- 357024, 35396
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2017-B37 & 2017-B38 -- 2017 BY, 2017 BX
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2017-B29 -- 2017 AP20
926Tenagra II Obs. in Arizona, 1 in MPEC 2017-B30 -- 2017 BS
C51WISE in Earth polar orbit, 3 in MPECs 2017-B27, 2017-B29 & 2017-B36 -- 2017 AQ20, 2017 AP20, 452389
C42Xingming Obs. in China, 1 in MPEC 2017-B37 -- 2017 BX
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 21 January '17

At last check (NEODyS and JPL at 2358 UTC) there was no risk monitoring news to report yet today. Visit the CRT to view activity in the last four weeks and our ephemerides page for a complete list of risk-rated objects under current observation or having recent news.

Chronology  on 21 January '17

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

2358Grabbed MPEC 2017-B36 - 2017 AQ20 - see above
Grabbed MPEC 2017-B37 - 2017 BX - see above
Grabbed MPEC 2017-B38 - 2017 BY - see above
2226Generated Traffic Report
2139Grabbed MPEC 2017-B28 - 2017 AO20 - see above
Grabbed MPEC 2017-B29 - 2017 AP20 - see above
Grabbed MPEC 2017-B30 - 2017 BS - see above
Grabbed MPEC 2017-B31 - 2017 BT - see above
Grabbed MPEC 2017-B32 - 2017 BU - see above
Grabbed MPEC 2017-B33 - 2017 BV - see above
Grabbed MPEC 2017-B34 - 2017 BW - see above
Grabbed MPEC 2017-B35 - 2008 SD - see above
1709Grabbed MPEC 2017-B27 - Daily Orbit Update - see above
0100Noted Radar Astrometry database update - see above
0027Noted Radar Astrometry database update - see above