Contents  on 31 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 31 January '17

Eight objects reported inside ten LD

Today there are eight small Solar-System bodies known to be within ten lunar distances (LD) of Earth. Nearest is risk-listed NHATS target 2017 BJ30, which at 0234 UTC got its closest to Earth this time around -- coming to 1.03 LD, and its closest to the Moon -- 1.24 LD at 0745 UTC.

Further out, NHATS target 2017 BB7 also came its closest on this passage, reaching 2.97 LD at 1753 UTC, newly discovered intruder 2017 BS32 is inbound from 7.31 to 4.75 LD, intruder and NHATS target 2017 BX leaves our ten-LD traffic reporting zone, slipping off from 9.49 to 11.12 LD, and newly announced 2017 BR32 also exits, moving from 9.74 to 10.96 LD.

Earth passage I D ~Size Distance Today  Notes
0.13 LD yesterday2017 BH30 6 m  2.70 to 6.06 LD intruder - DOU
0.42 LD Feb. 22017 BS32 15 m  4.75 from 7.31 LD NEW, intruder - MPEC, DOU
0.69 LD Jan. 252017 BX 9 m  9.49 to 11.12 LD exits ten LD, intruder, NHATS target
1.03 LD today2017 BJ30 17 m  1.03 LD NHATS target, risk, Earth closest at 0234 UTC, Moon closest 1.24 LD at 0745 UTC
2.48 LD Feb. 52017 BG30 4 m  4.14 from 4.75 LD NHATS target - DOU
2.97 LD today2017 BB7 9 m  2.97 LD NHATS target, Earth closest at 1753 UTC
5.57 LD Feb. 22017 BB6 13 m  6.17 from 7.38 LD DOU
7.70 LD Jan. 272017 BR32 16 m  9.74 to 10.96 LD NEW, exits ten LD - MPEC
Approaching
4.64 LD Feb. 172017 BW 70 m  < 10 LD Feb. 9, radar/NHATS target - DOU
6.57 LD Feb. 72017 BQ6 182 m  < 10 LD Feb. 4 - DOU
7.10 LD Feb. 52013 FK 78 m  < 10 LD Feb. 2
8.67 LD Feb. 52017 BK30 12 m  < 10 LD Feb. 3, risk - DOU

This report was generated at 2014 UTC with the discoveries of 2017 BS32 (MPEC, DOU) and 2017 BR32 (MPEC), and with first follow-up in today's DOU MPEC for inbound NHATS target 2017 BG30, approaching risk-listed 2017 BK30, and four departed objects: 2017 BQ30, 2017 BM30, 2017 BC6, and risk-listed 2017 BE30, along with continuing follow-up for outbound (and no longer risk-listed) intruder 2017 BH30, inbound 2017 BB6, approaching objects 2017 BQ6 and radar/NHATS target 2017 BW, and departed objects 2017 BN6 and 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.

NEOCP Activity  on 31 January '17

The MPC's NEO Confirmation Page has 134 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 134 objects listed. Of these, 70 were "one nighters." So far The Tracking News has counted a total of 175 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 31 January '17

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 24 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2017-B167 - "16:10 UT" - 2017 BY32


MPEC 2017-B166 - "16:07 UT" - 2017 BX32


MPEC 2017-B165 - "15:34 UT" - 2017 BW32


MPEC 2017-B164 - "15:31 UT" - 2017 BV32


MPEC 2017-B163 - "15:27 UT" - 2017 BU32


MPEC 2017-B162 - "15:19 UT" - 2017 BT32


MPEC 2017-B161 - "15:11 UT" - 2012 QY14


<< DOU on 31 Jan. '17 >>  MPEC 2017-B160 - "13:04 UT" - Daily Orbit Update


MPEC 2017-B159 - "12:34 UT" - 2017 BS32


MPEC 2017-B158 - "12:30 UT" - 2017 BR32


MPEC 2017-B157 - "12:26 UT" - 2017 BQ32


MPEC 2017-B156 - "12:22 UT" - 2017 BP32


MPEC 2017-B155 - "12:19 UT" - 2017 BO32


MPEC 2017-B154 - "12:15 UT" - 2017 BN32


MPEC 2017-B153 - "12:12 UT" - 2017 BM32


MPEC 2017-B152 - "12:08 UT" - 2017 BL32


MPEC 2017-B151 - "12:05 UT" - 2017 BK32


MPEC 2017-B150 - "12:02 UT" - 2017 BJ32


MPEC 2017-B149 - "11:59 UT" - 2017 BH32


MPEC 2017-B148 - "11:55 UT" - 2017 BG32


MPEC 2017-B147 - "11:46 UT" - 2017 BF32


MPEC 2017-B146 - "11:42 UT" - 2017 BE32


MPEC 2017-B145 - "11:34 UT" - 1998 QK28


MPEC 2017-B144 - "11:32 UT" - 2016 FD15

Observers  on 31 January '17

A total of 40 observers appear in today's MPECs.

CodeObserver / observatory
705"Kristie Nault via Apache Point Obs. in New Mexico, 11 in MPECs 2017-B160, 2017-B162, 2017-B163 & 2017-B166 -- 2017 BZ6, 2017 BX32, 2017 BU32, 2017 BU, 2017 BT32, 2017 BN6, 2017 BK30, 2017 BG30, 2017 BF29, 2017 BC6, 2017 AT4
H21Astronomical Research Obs. Westfield in Illinois, 16 in MPECs 2017-B154, 2017-B156, 2017-B160 & 2017-B165 -- 2017 BW32, 2017 BW, 2017 BU, 2017 BP32, 2017 BO3, 2017 BN32, 2017 BM3, 2017 BL3, 2017 AT4, 2017 AO13, 2017 AN20, 2016 TD18, 2016 BV39, 2015 DV215, 2005 EY169, 349507
Z84Calar Alto Schmidt in Spain, 3 in MPECs 2017-B152, 2017-B153 & 2017-B158 -- 2017 BR32, 2017 BM32, 2017 BL32
160Castelmartini Obs. in Italy, 8 in MPECs 2017-B156 & 2017-B160 -- 2017 BP32, 2016 UU80, 2016 ON, 2014 WL368, 96590, 467963, 138846, 7341
703Catalina Sky Survey (CSS) in Arizona, 20 in MPECs 2017-B154, 2017-B156 & 2017-B160 -- 2017 BP32, 2017 BN32, 2017 BM3, 2017 BL3, 2017 BD29, 2016 YU8, 2016 PR8, 2015 ME54, 2014 EW24, 2005 TF, 89830, 351545, 349507, 340291, 262623, 252558, 226198, 203471, 153201, 138925
107Cavezzo Obs. in Italy, 4 in MPEC 2017-B160 -- 2017 BQ6, 2016 UU80, 96590, 54789
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2017-B145, 2017-B148 & 2017-B164 -- 2017 BV32, 2017 BG32, 1998 QK28
K88GINOP-KHK in Hungary, 5 in MPECs 2017-B152, 2017-B153, 2017-B154, 2017-B156 & 2017-B157 -- 2017 BQ32, 2017 BP32, 2017 BN32, 2017 BM32, 2017 BL32
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2017-B160 -- 2017 BD29
U69.program code "." (23) via iTelescope Obs. Auberry in northern California, 1 in MPEC 2017-B160 -- 2017 BS32
H06+program code "+" (20) via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-B160 -- 2017 AG5
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 3 in MPECs 2017-B154, 2017-B156 & 2017-B160 -- 2017 BP32, 2017 BN32, 2017 BL30
246KLENOT in the Czech Republic, 2 in MPECs 2017-B154 & 2017-B156 -- 2017 BP32, 2017 BN32
W86LCOGT Cerro Tololo B in Chile, 4 in MPECs 2017-B160 & 2017-B167 -- 2017 BY32, 2017 BW, 265482, 192559
W87LCOGT Cerro Tololo C in Chile, 2 in MPEC 2017-B160 -- 2017 BW, 192559
V37LCOGT Fort Davis in Texas, 1 in MPEC 2017-B160 -- 2017 BW
Q63LCOGT Siding Spring A in New South Wales, 2 in MPEC 2017-B160 -- 2011 EP51, 192559
K92LCOGT Sutherland B in South Africa, 1 in MPEC 2017-B145 -- 1998 QK28
Z21LCOGT Tenerife Aqawan A#1 in the Canary Islands, 1 in MPEC 2017-B160 -- 2017 BH30
H01Magdalena Ridge Obs. (MRO) in New Mexico, 14 in MPECs 2017-B146, 2017-B147, 2017-B148, 2017-B149, 2017-B150, 2017-B151, 2017-B152, 2017-B153, 2017-B154, 2017-B155, 2017-B156, 2017-B157, 2017-B159, 2017-B160 & 2017-B165 -- 2017 BW32, 2017 BS32, 2017 BQ32, 2017 BP32, 2017 BO32, 2017 BN32, 2017 BM32, 2017 BL32, 2017 BK32, 2017 BJ32, 2017 BH32, 2017 BG32, 2017 BF32, 2017 BE32
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2017-B160 -- 87684
W92MASTER OAFA Obs., 2 in MPEC 2017-B160 -- 480004, 369264
568_Marco Micheli on Mauna Kea in Hawaii, 15 in MPECs 2017-B145, 2017-B146, 2017-B147, 2017-B148, 2017-B149, 2017-B150, 2017-B151, 2017-B155, 2017-B160, 2017-B162, 2017-B163, 2017-B165, 2017-B166 & 2017-B167 -- 2017 BY32, 2017 BX32, 2017 BW32, 2017 BU32, 2017 BT32, 2017 BO32, 2017 BK32, 2017 BK30, 2017 BJ32, 2017 BH32, 2017 BG32, 2017 BF32, 2017 BE32, 2017 BE30, 1998 QK28
G96Mt. Lemmon Survey (MLS) in Arizona, 26 in MPECs 2017-B152, 2017-B153, 2017-B157, 2017-B158 & 2017-B160 -- 2017 BR32, 2017 BQ32, 2017 BM32, 2017 BL32, 2016 YV8, 2016 YR8, 2014 KU76, 2013 CL89, 2009 WL1, 2003 UF22, 97725, 96189, 482055, 477490, 418900, 249595, 226198, 190166, 16816, 159608, 154144, 154029, 138175, 3200, 1864, 1863
J43Oukaimeden Obs. in Morocco, 4 in MPEC 2017-B160 -- 2017 BU6, 2016 AU8, 2010 CM44, 5693
F51Pan-STARRS 1 (PS1) in Hawaii, 42 in MPECs 2017-B144, 2017-B145, 2017-B146, 2017-B147, 2017-B148, 2017-B149, 2017-B150, 2017-B151, 2017-B154, 2017-B155, 2017-B156, 2017-B159, 2017-B160, 2017-B162, 2017-B163, 2017-B164, 2017-B165, 2017-B166 & 2017-B167 -- 2017 BY32, 2017 BX32, 2017 BW32, 2017 BV32, 2017 BU6, 2017 BU32, 2017 BT32, 2017 BS32, 2017 BP32, 2017 BO32, 2017 BN32, 2017 BK32, 2017 BJ32, 2017 BH32, 2017 BG32, 2017 BF32, 2017 BE32, 2016 YZ10, 2016 XZ23, 2016 WS9, 2016 FD15, 2015 BN509, 2014 BG3, 2013 GL8, 2013 CL89, 2003 CR1, 2000 CE59, 1998 QK28, 52761, 482391, 471240, 465402, 420286, 418900, 413002, 405427, 340291, 205378, 136582, 5646, 2329, 1864
K63Pascoli Obs. in Italy, 2 in MPECs 2017-B154 & 2017-B156 -- 2017 BP32, 2017 BN32
L04ROASTERR-1 in Romania, 3 in MPECs 2017-B159 & 2017-B160 -- 2017 BS32, 2017 BQ6, 2016 UU80
104San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2017-B153, 2017-B154 & 2017-B156 -- 2017 BP32, 2017 BN32, 2017 BM32
H36Sandlot Obs. in Kansas, 3 in MPECs 2017-B157, 2017-B159 & 2017-B160 -- 2017 BS32, 2017 BQ32, 2016 PZ66
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-B160 -- 2017 AP20
691Spacewatch 0.9m telescope in Arizona, 9 in MPECs 2017-B146, 2017-B160 & 2017-B166 -- 2017 BX32, 2017 BR31, 2017 BE32, 2017 BE30, 2017 BD30, 2017 BC30, 2017 AM4, 2016 VV3, 2000 CE59
291Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2017-B144, 2017-B146, 2017-B148, 2017-B159, 2017-B160, 2017-B162, 2017-B164, 2017-B165, 2017-B166 & 2017-B167 -- 2017 BY32, 2017 BX32, 2017 BW32, 2017 BV32, 2017 BT32, 2017 BS32, 2017 BR31, 2017 BG32, 2017 BE32, 2016 FD15, 2015 GY
W34Squirrel Valley Obs. in North Carolina, 2 in MPEC 2017-B160 -- 2015 BY310, 480984
I52Steward Obs. Mt. Lemmon Station in Arizona, 23 in MPECs 2017-B148, 2017-B152, 2017-B153, 2017-B154, 2017-B156, 2017-B157, 2017-B158, 2017-B159 & 2017-B160 -- 2017 BV6, 2017 BU6, 2017 BS32, 2017 BR32, 2017 BQ32, 2017 BQ30, 2017 BP32, 2017 BP30, 2017 BP3, 2017 BO30, 2017 BN32, 2017 BN30, 2017 BM32, 2017 BM30, 2017 BL32, 2017 BL30, 2017 BK30, 2017 BJ29, 2017 BG32, 2017 BG30, 2017 BD30, 2017 BB6, 2016 YY7
J22Tacande Obs. in the Canary Islands, 2 in MPECs 2017-B154 & 2017-B156 -- 2017 BP32, 2017 BN32
926Tenagra II Obs. in Arizona, 1 in MPEC 2017-B146 -- 2017 BE32
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPECs 2017-B160 & 2017-B161 -- 2014 BW57, 2012 QY14
C51WISE in Earth polar orbit, 4 in MPEC 2017-B160 -- 2017 BA30, 345646, 152563, 141056
C42Xingming Obs. in China, 3 in MPECs 2017-B154, 2017-B156 & 2017-B159 -- 2017 BS32, 2017 BP32, 2017 BN32
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 31 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 BV32JPL Sentry17302027-2107163.1e-08-4.33-4.630JPL: "Analysis based on 12 observations spanning 2.8957 days (2017-Jan-28.23528 to 2017-Jan-31.13097)." Diameter approximately 0.421 km. from mean, weighted H=19.5.
2017 BO32JPL Sentry16502021-21162655.0e-05-3.56-3.710JPL: "Analysis based on 11 observations spanning 1.7890 days (2017-Jan-29.39721 to 2017-Jan-31.186223)." Diameter approximately 0.046 km. from mean, weighted H=24.3.
2017 BP31NEODyS17302102-211521.42e-09-6.28-6.30NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2017-01-27.642 to 2017-01-30.553."
2017 BW30NEODyS16502044-2117822.61e-05-4.11-4.160NEODyS: "Based on 21 optical observations (of which 1 are rejected as outliers) from 2017-01-28.542 to 2017-01-30.250."
2017 BL30JPL Sentry17302029-2066303.3e-04-2.25-2.340JPL: "Analysis based on 39 observations spanning 2.8893 days (2017-Jan-28.37792 to 2017-Jan-31.26717)." Diameter approximately 0.074 km. from mean, weighted H=23.3.
2017 BK30NEODyS17302085-210654.65e-06-6.61-6.940NEODyS: "Based on 21 optical observations (of which 3 are rejected as outliers) from 2017-01-26.449 to 2017-01-31.305."
JPL Sentry1650208534.5e-06-6.62-6.820JPL: "Analysis based on 20 observations spanning 4.8559 days (2017-Jan-26.44804 to 2017-Jan-31.303973)." Diameter approximately 0.012 km. from mean, weighted H=27.3.
2017 BH30NEODyS1730R E M O V E D-
2017 BF30NEODyS16502045-2117257.52e-08-7.16-7.290NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2017-01-27.632 to 2017-01-29.461."
2017 BE30JPL Sentry17302096-210021.1e-07-7.63-7.640JPL: "Analysis based on 18 observations spanning 3.9309 days (2017-Jan-27.53064 to 2017-Jan-31.46159)." Diameter approximately 0.019 km. from mean, weighted H=26.3.

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 31 January '17

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

2014Generated Traffic Report
1730Noted that JPL Sentry has updated its 2017 BE30 risk assessment - see above
Noted that NEODyS has removed 2017 BH30 as an impact risk - see above
Noted that NEODyS has updated its 2017 BK30 risk assessment - see above
Noted that JPL Sentry has updated its 2017 BL30 risk assessment - see above
Noted that NEODyS has posted 2017 BP31 as an impact risk - see above
Noted that JPL Sentry has posted 2017 BV32 as an impact risk - see above
1650Noted that NEODyS has updated its 2017 BF30 risk assessment - see above
Noted that JPL Sentry has updated its 2017 BK30 risk assessment - see above
Noted that JPL Sentry has posted 2017 BO32 as an impact risk - see above
Noted that NEODyS has updated its 2017 BW30 risk assessment - see above
Grabbed MPEC 2017-B144 - 2016 FD15 - see above
Grabbed MPEC 2017-B145 - 1998 QK28 - see above
Grabbed MPEC 2017-B146 - 2017 BE32 - see above
Grabbed MPEC 2017-B147 - 2017 BF32 - see above
Grabbed MPEC 2017-B148 - 2017 BG32 - see above
Grabbed MPEC 2017-B149 - 2017 BH32 - see above
Grabbed MPEC 2017-B150 - 2017 BJ32 - see above
Grabbed MPEC 2017-B151 - 2017 BK32 - see above
Grabbed MPEC 2017-B152 - 2017 BL32 - see above
Grabbed MPEC 2017-B153 - 2017 BM32 - see above
Grabbed MPEC 2017-B154 - 2017 BN32 - see above
Grabbed MPEC 2017-B155 - 2017 BO32 - see above
Grabbed MPEC 2017-B156 - 2017 BP32 - see above
Grabbed MPEC 2017-B157 - 2017 BQ32 - see above
Grabbed MPEC 2017-B158 - 2017 BR32 - see above
Grabbed MPEC 2017-B159 - 2017 BS32 - see above
Grabbed MPEC 2017-B160 - Daily Orbit Update - see above
Grabbed MPEC 2017-B161 - 2012 QY14 - see above
Grabbed MPEC 2017-B162 - 2017 BT32 - see above
Grabbed MPEC 2017-B163 - 2017 BU32 - see above
Grabbed MPEC 2017-B164 - 2017 BV32 - see above
Grabbed MPEC 2017-B165 - 2017 BW32 - see above
Grabbed MPEC 2017-B166 - 2017 BX32 - see above
Grabbed MPEC 2017-B167 - 2017 BY32 - see above