Contents  on 27 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 27 January '17

Three objects reported inside ten LD

There are three minor objects reported to be within ten lunar distances (LD) of Earth today. Intruder and NHATS target 2017 BX is the nearest, moving outward from 3.03 to 4.63 LD. Newly announced risk-listed 2017 BD6 is outbound from 5.73 to 7.72 LD. And 2017 BS5 leaves our ten-LD traffic reporting zone, slipping off from 9.92 to 10.96 LD.

Next known to be on approach is new discovery 2017 BB6, which comes inside ten LD on January 29th.

Earth passage I D ~Size Distance Today  Notes
0.69 LD Jan. 252017 BX 9 m  3.03 to 4.63 LD intruder, NHATS target
1.98 LD Jan. 242017 BD6 6 m  5.73 to 7.72 LD NEW, risk - MPEC
6.55 LD Jan. 212017 BS5 48 m  9.92 to 10.96 LD exits ten LD - DOU
Approaching
4.6   LD Feb. 172017 BW 70 m  < 10 LD Feb. 9, uncertainty +/- 16 mins., radar/NHATS target - DOU
5.57 LD Feb. 22017 BB6 12 m  < 10 LD Jan. 29, NEW - MPEC
7.10 LD Feb. 52013 FK 78 m  < 10 LD Feb. 2 - DOU
9.1   LD Feb. 42005 VL1 13 m  < 10 LD Feb. 1, uncertainty +/- 15.0000 hours, NHATS target, risk

This report was generated at 2217 UTC with new discoveries 2017 BD6 (MPEC), 2017 BB6 (MPEC), and already departed 2017 BC6 (MPEC), which passed our planet at 7.70 LD on January 19th, and with first follow-up for 2017 BS5 in today's DOU MPEC in the form of prediscovery and other observations adding 11.54 days to its 0.88-day discovery arc. The DOU also has the recovery of distant 136617 1994 CC and follow-up for approaching objects 2013 FK and radar/NHATS target 2017 BW, and for departed NHATS targets 2017 AG5 and radar target 2016 TB57.



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.

NEOCP Activity  on 27 January '17

The MPC's NEO Confirmation Page has 92 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 92 objects listed. Of these, 55 were "one nighters." So far The Tracking News has counted a total of 111 listings on the NEOCP today.

New MPECs  on 27 January '17

Minor Planet Electronic Circulars

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


MPEC 2017-B83 - "23:12 UT" - Comet C/2016 VZ18 (Panstarrs)


MPEC 2017-B82 - "22:43 UT" - Comet P/2010 EY90 = 2017 B1 (Lemmon)


MPEC 2017-B81 - "19:53 UT" - 2017 BC6


MPEC 2017-B80 - "19:50 UT" - 2017 BD6


MPEC 2017-B79 - "19:47 UT" - 2017 BB6


MPEC 2017-B78 - "19:43 UT" - 2017 BA6


MPEC 2017-B77 - "19:40 UT" - 2017 BZ5


MPEC 2017-B76 - "19:36 UT" - 2017 BY5


MPEC 2017-B75 - "19:33 UT" - 2017 BX5


MPEC 2017-B74 - "15:50 UT" - 2015 BG4


MPEC 2017-B73 - "15:48 UT" - 2014 CX14


MPEC 2017-B72 - "15:38 UT" - 2016 OP5


MPEC 2017-B71 - "15:36 UT" - 2010 UD


<< DOU on 27 Jan. '17 >>  MPEC 2017-B70 - "13:04 UT" - Daily Orbit Update

Observers  on 27 January '17

A total of 50 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPEC 2017-B70 -- 2017 BW, 2016 XG18, 2016 XD1, 2016 VY5, 2016 PZ66
T05ATLAS Haleakala in Hawaii, 5 in MPECs 2017-B70 & 2017-B77 -- 2017 BZ5, 2017 BS5, 87684, 137925, 10150
300Bisei Spaceguard Center in Japan, 9 in MPECs 2017-B70 & 2017-B77 -- 2017 BZ5, 2016 ON, 2005 WS3, 2005 TF, 482250, 164121, 5143, 3200, 433
Q68Blue Mountains Obs. in New South Wales, 1 in MPEC 2017-B70 -- 106589
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2017-B77 -- 2017 BZ5
160Castelmartini Obs. in Italy, 4 in MPECs 2017-B70 & 2017-B77 -- 2017 BZ5, 96590, 85804, 452389
703Catalina Sky Survey (CSS) in Arizona, 15 in MPECs 2017-B70 & 2017-B77 -- 2017 BZ5, 2017 BM3, 2016 VY3, 2016 PR8, 2015 ME54, 2012 BX13, 2005 TF, 89830, 349507, 340291, 262623, 252558, 226198, 203471, 138925
K51Celado Obs. in Italy, 4 in MPECs 2017-B77, 2017-B78, 2017-B79 & 2017-B81 -- 2017 BZ5, 2017 BC6, 2017 BB6, 2017 BA6
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2017-B83 -- C/2016 VZ18
958Dax Obs. in France, 1 in MPEC 2017-B77 -- 2017 BZ5
113Drebach Obs. in Germany, 1 in MPEC 2017-B77 -- 2017 BZ5
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 14 in MPECs 2017-B70, 2017-B71, 2017-B72, 2017-B73, 2017-B75, 2017-B76, 2017-B77, 2017-B79, 2017-B80, 2017-B81 & 2017-B83 -- 2017 BZ5, 2017 BY5, 2017 BX5, 2017 BL3, 2017 BH3, 2017 BD6, 2017 BC6, 2017 BB6, 2017 AT4, C/2016 VZ18, 2016 OP5, 2014 CX14, 2013 AP60, 2010 UD
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2017-B77 -- 2017 BZ5
203GiaGa Obs. in Italy, 1 in MPEC 2017-B77 -- 2017 BZ5
K88GINOP-KHK in Hungary, 9 in MPECs 2017-B70, 2017-B76, 2017-B77, 2017-B78, 2017-B79, 2017-B80 & 2017-B81 -- 2017 BZ5, 2017 BY5, 2017 BW, 2017 BS5, 2017 BL3, 2017 BD6, 2017 BC6, 2017 BB6, 2017 BA6
J95Great Shefford Obs. in England, 1 in MPEC 2017-B77 -- 2017 BZ5
H15ISON New Mexico Obs. in New Mexico, 1 in MPEC 2017-B70 -- 22771
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-B83 -- C/2016 VZ18
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2017-B70 -- 265482
W87LCOGT Cerro Tololo C in Chile, 1 in MPEC 2017-B70 -- 192559
T04LCOGT Haleakala OGG B#2 in Hawaii, 1 in MPEC 2017-B70 -- 265482
K91LCOGT Sutherland A in South Africa, 1 in MPEC 2017-B83 -- C/2016 VZ18
K92LCOGT Sutherland B in South Africa, 1 in MPEC 2017-B70 -- 192559
K93LCOGT Sutherland C in South Africa, 1 in MPEC 2017-B70 -- 192559
Z21LCOGT Tenerife Aqawan A#1 in the Canary Islands, 1 in MPEC 2017-B77 -- 2017 BZ5
K38M57 Obs. in Italy, 1 in MPEC 2017-B70 -- 2016 UE101
W92MASTER OAFA Obs., 1 in MPEC 2017-B70 -- 1036
C94MASTER-II Tunka in Russia, 1 in MPEC 2017-B70 -- 433
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2017-B71 -- 2010 UD
568_Marco Micheli on Mauna Kea in Hawaii, 2 in MPECs 2017-B76 & 2017-B83 -- 2017 BY5, C/2016 VZ18
474Mt. John Obs. in New Zealand, 2 in MPECs 2017-B82 & 2017-B83 -- P/2017 B1, C/2016 VZ18
G96Mt. Lemmon Survey (MLS) in Arizona, 33 in MPECs 2017-B70, 2017-B78, 2017-B79, 2017-B80, 2017-B81 & 2017-B82 -- 2017 BD6, 2017 BC6, 2017 BB6, 2017 BA6, P/2017 B1, 2016 YQ8, 2016 XD1, 2016 VQ5, 2016 PN38, 2014 BG3, P/2010 EY90, 99935, 481904, 480984, 457059, 420286, 386298, 34613, 315020, 313809, 312956, 307070, 22753, 159923, 152560, 138095, 13651, 9172, 8507, 6456, 5828, 4179, 3103
K74Muensterschwarzach Obs. in Germany, 3 in MPEC 2017-B70 -- 370307, 164121, 137170
J69North Obs. in England, 1 in MPEC 2017-B70 -- 2001 BX15
Z80Northolt Branch Obs. in England, 1 in MPEC 2017-B77 -- 2017 BZ5
F51Pan-STARRS 1 (PS1) in Hawaii, 52 in MPECs 2017-B70, 2017-B74, 2017-B75, 2017-B76, 2017-B78, 2017-B82 & 2017-B83 -- 2017 BY5, 2017 BX5, 2017 BS5, 2017 BP3, 2017 BL3, 2017 BA6, P/2017 B1, 2017 AM4, 2016 YW7, 2016 YJ8, 2016 YE3, 2016 XD1, C/2016 VZ18, 2016 UN36, 2016 PL1, 2016 NV, 2015 UM67, 2015 BG4, 2014 AD17, 2013 CT36, 2013 AB53, 2012 AE3, 2009 HF88, 2009 BL2, 2004 BE85, 2001 QE34, 482718, 481989, 481984, 481327, 480984, 480934, 480854, 474554, 431775, 276786, 276397, 267221, 22771, 154652, 143404, 138846, 136773, 136617, 13553, 103067, 10165, 5828, 5626, 3838, 3552, 1627
K63Pascoli Obs. in Italy, 1 in MPEC 2017-B77 -- 2017 BZ5
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 11 in MPEC 2017-B70 -- 2017 BT, 2016 YT8, 2016 XD1, 2016 UU80, 85990, 347813, 326683, 275611, 138846, 137924, 4179
L04ROASTERR-1 in Romania, 2 in MPECs 2017-B70 & 2017-B77 -- 2017 BZ5, 2017 BL3
H36Sandlot Obs. in Kansas, 1 in MPEC 2017-B77 -- 2017 BZ5
Q11Shinshiro Obs., 2 in MPEC 2017-B70 -- 138846, 1627
587Sormano Obs. in Italy, 1 in MPEC 2017-B77 -- 2017 BZ5
G45Space Surveillance Telescope Atom Site (SST Atom Site) in New Mexico, 55 in MPECs 2017-B70 & 2017-B77 -- 2017 BZ5, 2017 BW, 2017 AO13, 2017 AG5, 2016 YZ10, 2016 WX9, 2016 VY3, 2016 UU80, 2016 PR8, 2015 BN509, 2013 VC13, 2013 FK, 2011 WO41, 2009 BL2, 2006 DX, 2005 TF, 97725, 90075, 85804, 482344, 481904, 475665, 468583, 438955, 418900, 417581, 413002, 385343, 36017, 34613, 340291, 25916, 255501, 232382, 22771, 20255, 186822, 164120, 159608, 153201, 152560, 143404, 138175, 136635, 11398, 10165, 7088, 5693, 5653, 5131, 4055, 3352, 3103, 3102, 1943
691Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2017-B70 & 2017-B83 -- 2017 BH3, 2017 AG5, 2016 WJ7, C/2016 VZ18, 2016 VQ5, 2005 ML13
291Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2017-B70 & 2017-B83 -- 2017 AY13, 2017 AR4, 2017 AH3, C/2016 VZ18, 2016 SH45, 2016 SG45, 2016 PZ66, 2014 YN44, 2008 HZ1, 2004 UB
W34Squirrel Valley Obs. in North Carolina, 2 in MPEC 2017-B70 -- 22753, 13651
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2017-B77 -- 2017 BZ5
I52Steward Obs. Mt. Lemmon Station in Arizona, 1 in MPEC 2017-B83 -- C/2016 VZ18
926Tenagra II Obs. in Arizona, 8 in MPECs 2017-B70, 2017-B74, 2017-B77, 2017-B78, 2017-B79, 2017-B80, 2017-B81 & 2017-B83 -- 2017 BZ5, 2017 BD6, 2017 BC6, 2017 BB6, 2017 BA6, 2016 YL4, C/2016 VZ18, 2015 BG4
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 6 in MPECs 2017-B70, 2017-B71 & 2017-B83 -- 2017 BL3, 2017 AK3, 2016 XQ23, C/2016 VZ18, 2016 TB57, 2010 UD
C51WISE in Earth polar orbit, 2 in MPECs 2017-B82 & 2017-B83 -- C/2016 VZ18, P/2010 EY90
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 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 BD6JPL Sentry22052083-209343.5e-06-7.42-7.730JPL: "Analysis based on 16 observations spanning .90464 days (2017-Jan-26.38633 to 2017-Jan-27.29097)." Diameter approximately 0.006 km. from mean, weighted H=28.6.
2017 BS5JPL Sentry1624R E M O V E DJPL: Risk listing removed at 1609 UTC.
2017 BL3NEODyS1700R E M O V E D-
JPL Sentry1624R E M O V E DJPL: Risk listing removed at 1613 UTC.
2017 AK3JPL Sentry1624R E M O V E DJPL: Risk listing removed at 1609 UTC.
2016 TB57JPL Sentry1902211211.1e-08-9.01-9.010JPL #2 for the day: "Analysis based on 116 observations spanning 135.12 days (2016-Sep-12.526234 to 2017-Jan-25.644213)." Diameter approximately 0.020 km. from mean, weighted H=26.1.

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 27 January '17

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

2358Grabbed MPEC 2017-B83 - Comet C/2016 VZ18 (Panstarrs) - see above
2306Grabbed MPEC 2017-B82 - Comet P/2010 EY90 = 2017 B1 (Lemmon) - see above
2217Generated Traffic Report
2205Noted that JPL Sentry has posted 2017 BD6 as an impact risk - see above
2000Grabbed MPEC 2017-B75 - 2017 BX5 - see above
Grabbed MPEC 2017-B76 - 2017 BY5 - see above
Grabbed MPEC 2017-B77 - 2017 BZ5 - see above
Grabbed MPEC 2017-B78 - 2017 BA6 - see above
Grabbed MPEC 2017-B79 - 2017 BB6 - see above
Grabbed MPEC 2017-B80 - 2017 BD6 - see above
Grabbed MPEC 2017-B81 - 2017 BC6 - see above
1902Noted that JPL Sentry has updated its 2016 TB57 risk assessment - see above
1700Noted that NEODyS has removed 2017 BL3 as an impact risk - see above
1624Noted that JPL Sentry has updated its 2016 TB57 risk assessment - see above
Noted that JPL Sentry has removed 2017 AK3 as an impact risk - see above
Noted that JPL Sentry has removed 2017 BL3 as an impact risk - see above
Noted that JPL Sentry has removed 2017 BS5 as an impact risk - see above
Grabbed MPEC 2017-B70 - Daily Orbit Update - see above
Grabbed MPEC 2017-B71 - 2010 UD - see above
Grabbed MPEC 2017-B72 - 2016 OP5 - see above
Grabbed MPEC 2017-B73 - 2014 CX14 - see above
Grabbed MPEC 2017-B74 - 2015 BG4 - see above