Contents  on 14 April '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 14 April '17

Two objects reported inside ten LD

Two minor objects are known to be less than ten lunar distances (LD) from our home world today, both of them outbound. NHATS target 2017 FT102 travels from 5.24 to 5.72 LD and 2017 FF128 from 6.72 to 7.49 LD. Approaching our neighborhood next, radar target 2014 JO25 comes inside ten LD on April 18th and 2017 CS, also a radar target, arrives on May 26th.

This report was generated at 1740 UTC with follow-up for 2017 CS in today's DOU MPEC, which also carries astrometry from 2016 for 2016 DV1 and 2016 DM1, and from 2015 for 2015 LR21, 2015 LK, intruder 2015 LF (adding 0.35 days to previous 0.67-day observation arc), 2015 KU121, and 2015 KW120.



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 14 April '17

The MPC's NEO Confirmation Page has 29 listings

When last checked at 2357 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 29 objects listed. Of these, six were "one nighters." So far The Tracking News has counted a total of 38 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 14 April '17

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2017-G94 - "20:09 UT" - 2013 QG17


<< DOU on 14 Apr. '17 >>  MPEC 2017-G93 - "12:02 UT" - Daily Orbit Update


MPEC 2017-G92 - "11:32 UT" - 2017 GO7


MPEC 2017-G91 - "11:29 UT" - 2017 GM7


MPEC 2017-G90 - "11:26 UT" - 2017 GL7


MPEC 2017-G89 - "11:24 UT" - 2017 GK7


MPEC 2017-G88 - "11:20 UT" - 2017 FU158

Observers  on 14 April '17

A total of 24 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 10 in MPECs 2017-G92 & 2017-G93 -- 2017 GO7, 2017 FY2, 2017 DT35, 2017 DO35, 2017 DO34, 2016 RF40, 90075, 220124, 11398, 1036
T08ATLAS Mauna Loa in Hawaii, 6 in MPEC 2017-G93 -- 474231, 220124, 143404, 11398, 4055, 3103
160Castelmartini Obs. in Italy, 4 in MPEC 2017-G93 -- 2017 AC5, 54789, 474231, 391508
107Cavezzo Obs. in Italy, 2 in MPEC 2017-G93 -- 2017 GM4, 474231
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2017-G90 -- 2017 GL7
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2017-G93 -- 2005 GB120
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 8 in MPECs 2017-G88, 2017-G89, 2017-G90, 2017-G91 & 2017-G93 -- 2017 GU5, 2017 GM7, 2017 GM6, 2017 GL7, 2017 GK7, 2017 FU158, 2017 FO128, 2017 FN128
K92LCOGT Sutherland B in South Africa, 1 in MPEC 2017-G92 -- 2017 GO7
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2017-G91 -- 2017 GM7
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2017-G93 -- 138404
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2017-G89 & 2017-G90 -- 2017 GL7, 2017 GK7
Z80Northolt Branch Obs. in England, 1 in MPEC 2017-G93 -- 3352
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPECs 2017-G89, 2017-G91 & 2017-G92 -- 2017 GO7, 2017 GM7, 2017 GK7
654Pomona College Table Mtn. Obs. (PCTMO) in southern California, 9 in MPEC 2017-G93 -- 2016 DV1, 2016 DM1, 2015 LR21, 2015 LQ21, 2015 LK, 2015 LF, 2015 KW120, 2015 KU121, 411201
D29Purple Mtn. Obs. Xuyi Station in China, 11 in MPEC 2017-G93 -- 2017 FE1, 2017 AC5, 2006 UM, 215588, 175189, 138155, 10636, 7088, 5626, 4055, 3352
W25RMS Obs., 5 in MPEC 2017-G93 -- 2017 GO4, 2017 GK4, 2017 CS, 260141, 138155
204Schiaparelli Obs. in Italy, 4 in MPECs 2017-G89, 2017-G90, 2017-G91 & 2017-G92 -- 2017 GO7, 2017 GM7, 2017 GL7, 2017 GK7
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2017-G90 -- 2017 GL7
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2017-G88, 2017-G90 & 2017-G91 -- 2017 GM7, 2017 GL7, 2017 FU158
I52Steward Obs. Mt. Lemmon Station in Arizona, 1 in MPEC 2017-G89 -- 2017 GK7
926Tenagra II Obs. in Arizona, 10 in MPECs 2017-G89, 2017-G90, 2017-G91, 2017-G92 & 2017-G93 -- 2017 GQ6, 2017 GO7, 2017 GO4, 2017 GM7, 2017 GL7, 2017 GK7, 2017 FQ128, 2017 FM128, 2016 UW80, 487577
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPECs 2017-G88 & 2017-G94 -- 2017 FU158, 2013 QG17
K17Valentines Obs., 1 in MPEC 2017-G93 -- 143404
C51WISE in Earth polar orbit, 1 in MPEC 2017-G88 -- 2017 FU158
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 April '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2357 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 NASA/JPL 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 GM7NEODyS19352028-2116183.94e-07-3.01-3.320NEODyS: "Based on 25 optical observations (of which 1 are rejected as outliers) from 2017-04-07.257 to 2017-04-14.319."
JPL Sentry16062028-2116255.616826e-07-2.75-2.980JPL:
2017 GP6NEODyS16062028-211568.92e-08-5.29-5.340NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2017-04-05.547 to 2017-04-09.437."
2017 GM6JPL Sentry16062101-211332.71543e-07-7.67-7.910JPL: Computed at 08:09 today Pacific time based on 23 observations spanning 9.0920 days (2017-Apr-05.34221 to 2017-Apr-14.4342). Diameter approximately 0.019 km. from weighted mean H=26.26.
2017 GU5NEODyS1934R E M O V E D-
JPL Sentry1606R E M O V E DJPL:
2017 FO128NEODyS19342104-211579.65e-06-3.94-3.960NEODyS #2 for the day: "Based on 50 optical observations (of which 2 are rejected as outliers) from 2017-03-30.263 to 2017-04-14.344."
JPL Sentry16062104-210961.918786e-05-3.63-3.660JPL:
2017 FN128NEODyS19342059-206423.26e-07-3.00-3.020NEODyS #2 for the day: "Based on 49 optical observations (of which 0 are rejected as outliers) from 2017-03-27.304 to 2017-04-14.248."
JPL Sentry16062059-206428.3537e-07-2.59-2.620JPL:
2017 FM128JPL Sentry1606R E M O V E DJPL: Risk listing removed at 1528 UTC today.
2017 EAJPL Sentry21092046-206633.8884e-05-6.75-6.780JPL: Computed at 13:58 today Pacific time based on 59 observations spanning .17912 days (2017-Mar-02.31463 to 2017-Mar-02.49375). Diameter approximately 0.003 km. from weighted mean H=30.65.
2016 WYJPL Sentry18302084-2111120.000103418764-6.47-6.580JPL: Computed at 10:39 today Pacific time based on 31 observations spanning 9.9848 days (2016-Nov-19.26009 to 2016-Nov-29.244925). Diameter approximately 0.005 km. from weighted mean H=29.23.
2016 TQ54JPL Sentry16062096-211371.679062e-06-7.18-7.690JPL: Computed at 03:50 today Pacific time based on 11 observations spanning 3.8998 days (2016-Oct-06.46164 to 2016-Oct-10.361482). Diameter approximately 0.012 km. from weighted mean H=27.25.
2016 TQ18JPL Sentry16062086-211036.5779e-06-6.15-6.180JPL: Computed at 00:45 today Pacific time based on 35 observations spanning 29.983 days (2016-Oct-06.418071 to 2016-Nov-05.401353). Diameter approximately 0.018 km. from weighted mean H=26.32.
2016 TTJPL Sentry16062084-209543.9823e-07-7.06-7.430JPL: Computed at 22:53 April 13th Pacific time based on 62 observations spanning 31.188 days (2016-Oct-02.31757 to 2016-Nov-02.505288). Diameter approximately 0.021 km. from weighted mean H=26.02.
2016 FE15JPL Sentry03162068-211635.6853e-07-8.13-8.240JPL: Computed at 17:57 April 13th Pacific time based on 29 observations spanning 9.9900 days (2016-Mar-31.42378 to 2016-Apr-10.413817). Diameter approximately 0.006 km. from weighted mean H=28.83.
2016 FW3JPL Sentry21092102-210221.8511e-07-7.29-7.510JPL: Computed at 13:49 today Pacific time based on 80 observations spanning 9.1588 days (2016-Mar-19.27166 to 2016-Mar-28.43045). Diameter approximately 0.027 km. from weighted mean H=25.48.
2016 EM156JPL Sentry03162108-211645.65916e-05-6.05-6.060JPL: Computed at 18:29 April 13th Pacific time based on 87 observations spanning 3.0992 days (2016-Mar-14.28899 to 2016-Mar-17.388175). Diameter approximately 0.009 km. from weighted mean H=27.94.
2016 EG86JPL Sentry16062117-211714.916e-09-8.27-8.270JPL: Computed at 03:33 today Pacific time based on 33 observations spanning 14.977 days (2016-Mar-01.48134 to 2016-Mar-16.458282). Diameter approximately 0.042 km. from weighted mean H=24.52.
2015 WP2JPL Sentry17302080-2116227.55702219000001e-05-6.67-7.060JPL: Computed at 10:11 today Pacific time based on 40 observations spanning 2.0081 days (2015-Nov-21.19581 to 2015-Nov-23.203902). Diameter approximately 0.003 km. from weighted mean H=30.08.
2015 PL57JPL Sentry0505R E M O V E DJPL: Risk listing removed at 0429 UTC today.
2015 HZ182JPL Sentry19342035-2101103.911e-09-9.16-9.420JPL: Computed at 11:58 today Pacific time based on 7 observations spanning 1.0021 days (2015-Apr-18.21066 to 2015-Apr-19.21274). Diameter approximately 0.013 km. from weighted mean H=27.00.
2015 DD54JPL Sentry03162114-211636.11623e-06-5.88-5.950JPL: Computed at 19:35 April 13th Pacific time based on 94 observations spanning 68.980 days (2015-Jan-20.32497 to 2015-Mar-30.304969). Diameter approximately 0.028 km. from weighted mean H=25.44.
2014 QF33JPL Sentry16062076-208221.4301e-07-6.03-6.110JPL: Computed at 07:45 today Pacific time based on 45 observations spanning 29.862 days (2014-Aug-20.47726 to 2014-Sep-19.339372). Diameter approximately 0.060 km. from weighted mean H=23.75.
2014 CEJPL Sentry22002111-211741.97389e-06-6.93-7.100JPL: Computed at 14:40 today Pacific time based on 57 observations spanning 26.143 days (2014-Feb-02.34272 to 2014-Feb-28.485427). Diameter approximately 0.013 km. from weighted mean H=27.03.
2012 TC4NEODyS16062020-2116999.33e-05-4.82-5.760NEODyS: "Based on 317 optical observations (of which 0 are rejected as outliers) from 2012-10-04.468 to 2012-10-11.749."
2011 YQ1JPL Sentry16062113-211311.425e-06-6.42-6.420JPL: Computed at 05:58 today Pacific time based on 62 observations spanning 10.180 days (2011-Dec-18.03236 to 2011-Dec-28.2122). Diameter approximately 0.026 km. from weighted mean H=25.60.
2011 OB26JPL Sentry03162099-2116225.4394692e-05-4.82-5.330JPL: Computed at 19:23 April 13th Pacific time based on 28 observations spanning 10.049 days (2011-Jul-28.4734 to 2011-Aug-07.52249). Diameter approximately 0.026 km. from weighted mean H=25.57.
2011 DV10JPL Sentry03162093-209311.174e-06-5.86-5.860JPL: Computed at 20:07 April 13th Pacific time based on 27 observations spanning 12.048 days (2011-Feb-26.30148 to 2011-Mar-10.34995). Diameter approximately 0.038 km. from weighted mean H=24.76.
2011 AK37JPL Sentry22372097-209714.686e-06-5.61-5.610JPL: Computed at 15:25 today Pacific time based on 28 observations spanning 29.147 days (2011-Jan-13.30429 to 2011-Feb-11.45098). Diameter approximately 0.031 km. from weighted mean H=25.16.
2010 VQ139JPL Sentry2300R E M O V E DJPL: Risk listing removed at 2256 UTC today.
2010 TW54JPL Sentry20382074-2115163.2011694e-05-6.07-6.120JPL: Computed at 13:30 today Pacific time based on 70 observations spanning 4.9304 days (2010-Oct-11.34885 to 2010-Oct-16.27929). Diameter approximately 0.010 km. from weighted mean H=27.55.
2009 TH8JPL Sentry16062097-210038.8506e-06-5.16-5.200JPL: Computed at 06:40 today Pacific time based on 44 observations spanning 3.9348 days (2009-Oct-14.54405 to 2009-Oct-18.47885). Diameter approximately 0.036 km. from weighted mean H=24.86.
2009 MG1JPL Sentry16062079-207913.054e-10-8.99-8.990JPL: Computed at 01:07 today Pacific time based on 19 observations spanning 11.101 days (2009-Jun-21.27223 to 2009-Jul-02.372809). Diameter approximately 0.052 km. from weighted mean H=24.07.
2009 MUJPL Sentry05052096-209921.5918e-08-7.75-7.900JPL: Computed at 20:41 April 13th Pacific time based on 108 observations spanning 4.8235 days (2009-Jun-19.30659 to 2009-Jun-24.13013). Diameter approximately 0.042 km. from weighted mean H=24.55.
2009 JF1JPL Sentry21092022-202212.586e-04-3.28-3.280JPL: Computed at 14:02 today Pacific time based on 25 observations spanning 1.2388 days (2009-May-04.42059 to 2009-May-05.659412). Diameter approximately 0.013 km. from weighted mean H=27.13.
2008 KN11JPL Sentry16062046-204613.601e-08-6.32-6.320JPL: Computed at 07:33 today Pacific time based on 132 observations spanning 21.819 days (2008-May-30.33435 to 2008-Jun-21.152984). Diameter approximately 0.075 km. from weighted mean H=23.27.
2007 WP3JPL Sentry16062098-2114177.686933e-06-4.62-4.990JPL: Computed at 08:43 today Pacific time based on 60 observations spanning 26.940 days (2007-Nov-18.26457 to 2007-Dec-15.20424). Diameter approximately 0.067 km. from weighted mean H=23.52.
2007 PR25JPL Sentry20382094-211331.88439e-08-5.96-6.090JPL: Computed at 12:57 today Pacific time based on 43 observations spanning 6.9866 days (2007-Aug-13.22063 to 2007-Aug-20.20726). Diameter approximately 0.140 km. from weighted mean H=21.85.
2005 VPJPL Sentry03162053-2103201.042154e-07-7.09-7.550JPL: Computed at 19:32 April 13th Pacific time based on 11 observations spanning 1.0204 days (2005-Nov-03.3064 to 2005-Nov-04.32682). Diameter approximately 0.027 km. from weighted mean H=25.47.
2004 XG29JPL Sentry16062112-211422.4861e-07-7.26-7.390JPL: Computed at 23:14 April 13th Pacific time based on 131 observations spanning 36.293 days (2004-Dec-10.06219 to 2005-Jan-15.35504). Diameter approximately 0.029 km. from weighted mean H=25.36.
2003 UQ25JPL Sentry17302093-209319.377e-08-6.64-6.640JPL: Computed at 10:26 today Pacific time based on 57 observations spanning 11.347 days (2003-Oct-24.35012 to 2003-Nov-04.697582). Diameter approximately 0.049 km. from weighted mean H=24.19.

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 14 April '17

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

2300Noted that JPL Sentry has removed 2010 VQ139 as an impact risk - see above
2237Noted that JPL Sentry has updated its 2011 AK37 risk assessment - see above
2200Noted that JPL Sentry has updated its 2014 CE risk assessment - see above
2109Noted that JPL Sentry has updated its 2009 JF1 risk assessment - see above
Noted that JPL Sentry has updated its 2016 FW3 risk assessment - see above
Noted that JPL Sentry has updated its 2017 EA risk assessment - see above
2038Noted that JPL Sentry has posted 2007 PR25 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 TW54 risk assessment - see above
Grabbed MPEC 2017-G94 - 2013 QG17 - see above
1934Noted that JPL Sentry has updated its 2015 HZ182 risk assessment - see above
Noted that NEODyS has updated its 2017 FN128 risk assessment - see above
Noted that NEODyS has updated its 2017 FO128 risk assessment - see above
Noted that NEODyS has posted 2017 GM7 as an impact risk - see above
Noted that NEODyS has removed 2017 GU5 as an impact risk - see above
1830Noted that JPL Sentry has updated its 2016 WY risk assessment - see above
1740Generated Traffic Report
1730Noted that JPL Sentry has updated its 2003 UQ25 risk assessment - see above
Noted that JPL Sentry has updated its 2015 WP2 risk assessment - see above
1606Noted that JPL Sentry has updated its 2004 XG29 risk assessment - see above
Noted that JPL Sentry has updated its 2007 WP3 risk assessment - see above
Noted that JPL Sentry has updated its 2008 KN11 risk assessment - see above
Noted that JPL Sentry has reposted 2009 MG1 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 TH8 risk assessment - see above
Noted that JPL Sentry has updated its 2011 YQ1 risk assessment - see above
Noted that NEODyS has updated its 2012 TC4 risk assessment - see above
Noted that JPL Sentry has updated its 2014 QF33 risk assessment - see above
Noted that JPL Sentry has reposted 2016 EG86 as an impact risk - see above
Noted that JPL Sentry has updated its 2016 TQ18 risk assessment - see above
Noted that JPL Sentry has updated its 2016 TQ54 risk assessment - see above
Noted that JPL Sentry has updated its 2016 TT risk assessment - see above
Noted that JPL Sentry has removed 2017 FM128 as an impact risk - see above
Noted that JPL Sentry has updated its 2017 FN128 risk assessment - see above
Noted that NEODyS has updated its 2017 FN128 risk assessment - see above
Noted that JPL Sentry has updated its 2017 FO128 risk assessment - see above
Noted that NEODyS has updated its 2017 FO128 risk assessment - see above
Noted that JPL Sentry has updated its 2017 GM6 risk assessment - see above
Noted that JPL Sentry has posted 2017 GM7 as an impact risk - see above
Noted that NEODyS has posted 2017 GP6 as an impact risk - see above
Noted that JPL Sentry has removed 2017 GU5 as an impact risk - see above
Grabbed MPEC 2017-G88 - 2017 FU158 - see above
Grabbed MPEC 2017-G89 - 2017 GK7 - see above
Grabbed MPEC 2017-G90 - 2017 GL7 - see above
Grabbed MPEC 2017-G91 - 2017 GM7 - see above
Grabbed MPEC 2017-G92 - 2017 GO7 - see above
Grabbed MPEC 2017-G93 - Daily Orbit Update - see above
0505Noted that JPL Sentry has updated its 2009 MU risk assessment - see above
Noted that JPL Sentry has removed 2015 PL57 as an impact risk - see above
0316Noted that JPL Sentry has updated its 2005 VP risk assessment - see above
Noted that JPL Sentry has updated its 2011 DV10 risk assessment - see above
Noted that JPL Sentry has updated its 2011 OB26 risk assessment - see above
Noted that JPL Sentry has updated its 2015 DD54 risk assessment - see above
Noted that JPL Sentry has updated its 2016 EM156 risk assessment - see above
Noted that JPL Sentry has updated its 2016 FE15 risk assessment - see above