Contents  on 16 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 16 April '17

Two objects reported inside ten LD

Two asteroids are known to be less than ten lunar distances (LD) from Earth today. NHATS target 2017 FT102 heads out from 6.21 to 6.70 LD and 2017 FF128 leaves our ten-LD traffic reporting "sphere," moving from 8.97 to 10.88 LD. Coming around the Sun next, radar target 2014 JO25 arrives inside ten LD on April 18th and radar target 2017 CS enters on May 26th.

This report was generated at 1810 UTC with follow-up for 2017 CS in today's DOU MPEC along with astrometry from last month for risk-listed radar target 2017 FV.



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 16 April '17

The MPC's NEO Confirmation Page has 52 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 52 objects listed. Of these, 23 were "one nighters." So far The Tracking News has counted a total of 53 listings on the NEOCP today.

New MPECs  on 16 April '17

Minor Planet Electronic Circulars

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


<< DOU on 16 Apr. '17 >>  MPEC 2017-H05 - "12:01 UT" - Daily Orbit Update


MPEC 2017-H04 - "03:12 UT" - Comet C/2017 E3 (Panstarrs)


MPEC 2017-H03 - "02:51 UT" - Comet C/2017 E2 (Tsuchinshan)


MPEC 2017-H02 - "02:44 UT" - Comet C/2017 E1 (Borisov)


MPEC 2017-H01 - "02:41 UT" - Comet C/2017 D3 (ATLAS)

Observers  on 16 April '17

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2017-H02 -- C/2017 E1
H21Astronomical Research Obs. Westfield in Illinois, 16 in MPEC 2017-H05 -- 2017 GT5, 2017 GM4, 2017 FL90, 2017 FH101, 2017 DT37, 2017 CS, 2017 BU31, 2017 AP20, 474231, 370307, 252091, 220124, 143404, 11398, 4055, 2329
W97Atacama Desert Obs. in Chile, 1 in MPEC 2017-H02 -- C/2017 E1
T05ATLAS Haleakala in Hawaii, 4 in MPECs 2017-H01 & 2017-H05 -- C/2017 D3, 54789, 391508, 3103
T08ATLAS Mauna Loa in Hawaii, 14 in MPECs 2017-H01 & 2017-H05 -- 2017 GM4, C/2017 D3, 484795, 413002, 405427, 388838, 252091, 215588, 138404, 138359, 7341, 4954, 3199, 1864
R58Beverly-Begg Obs., 1 in MPEC 2017-H01 -- C/2017 D3
W96Campo Catino Austral Obs. in Chile, 1 in MPEC 2017-H01 -- C/2017 D3
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 7 in MPEC 2017-H05 -- 2017 GT5, 2017 GM4, 2017 FG128, 2017 DT37, 2017 CS, 2017 AC5, 138404
H15ISON New Mexico Obs. in New Mexico, 1 in MPEC 2017-H05 -- 2329
Q60ISON Siding Spring Obs. in New South Wales, 2 in MPEC 2017-H05 -- 1998 HK1, 162452
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 4 in MPECs 2017-H01, 2017-H02, 2017-H03 & 2017-H04 -- C/2017 E3, C/2017 E2, C/2017 E1, C/2017 D3
695@program code "@" (41) via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2017-H02 -- C/2017 E1
D95Kurihara Obs. in Japan, 1 in MPEC 2017-H02 -- C/2017 E1
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2017-H01 -- C/2017 D3
118Modra Obs. in Slovakia, 1 in MPEC 2017-H05 -- 143404
G96Mt. Lemmon Survey (MLS) in Arizona, 31 in MPECs 2017-H03 & 2017-H05 -- 2017 FS101, 2017 FJ90, 2017 FH101, 2017 FG128, 2017 FE128, 2017 FD65, 2017 EN, C/2017 E2, 2017 DT37, 2016 MK1, 2015 FN118, 2014 NZ64, 2014 GD45, 2012 HN8, 2012 HN13, 2011 ED78, 2001 HW7, 65803, 484795, 483408, 409256, 39796, 374038, 361532, 274138, 252091, 235086, 190758, 138359, 137158, 719
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPECs 2017-H01, 2017-H03 & 2017-H05 -- C/2017 E2, C/2017 D3, 2017 AC5, 2006 UM, 7341, 1864
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2017-H03 -- C/2017 E2
204Schiaparelli Obs. in Italy, 12 in MPEC 2017-H05 -- 2017 GT5, 2017 FX64, 2017 FV, 2017 FS101, 2017 EB3, 2017 CH1, 2017 BG85, 2017 AC5, 2010 UD, 484795, 474231, 474179
Q11Shinshiro Obs., 1 in MPEC 2017-H01 -- C/2017 D3
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-H03 -- C/2017 E2
Y00SONEAR in Brazil, 1 in MPEC 2017-H04 -- C/2017 E3
691Spacewatch 0.9m telescope in Arizona, 7 in MPEC 2017-H05 -- 2017 GV6, 2017 GK4, 2017 FO2, 2017 FJ90, 2017 FE65, 2017 FE101, 2017 FD65
291Spacewatch 1.8m telescope in Arizona, 9 in MPEC 2017-H05 -- 2017 GM7, 2017 FQ64, 2017 FP64, 2017 FO128, 2017 FN128, 2017 FD157, 2014 UQ56, 2012 UU136, 2005 CL7
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2017-H05 -- 143404
A71Stixendorf Obs. in Austria, 2 in MPECs 2017-H02 & 2017-H03 -- C/2017 E2, C/2017 E1
926Tenagra II Obs. in Arizona, 25 in MPEC 2017-H05 -- 2017 GV6, 2017 GT5, 2017 GS6, 2017 GQ5, 2017 GP6, 2017 GO5, 2017 GO4, 2017 GM4, 2017 GL6, 2017 GK4, 2017 GG4, 2017 FS101, 2017 FQ101, 2017 FJ90, 2017 FH128, 2017 FH101, 2017 FG128, 2017 FE157, 2017 FE128, 2017 FE101, 2017 FD65, 2017 EC, 2016 YU8, 2016 UT80, 354876
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-H05 -- 2017 CN1
367Yatsuka Obs. in Japan, 1 in MPEC 2017-H02 -- C/2017 E1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 April '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS 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 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 GM7NEODyS20102028-2116171.56e-07-3.30-3.530NEODyS #2 for the day: "Based on 31 optical observations (of which 1 are rejected as outliers) from 2017-04-07.257 to 2017-04-16.259."
JPL Sentry17312035-2103121.457397e-07-3.24-3.360JPL:
2017 GP6JPL Sentry17312028-202811.734e-10-7.14-7.140JPL:
NEODyS2010R E M O V E DNEODyS #2 for the day
2017 FD157NEODyS2010204217.22e-09-6.50-6.50NEODyS: "Based on 54 optical observations (of which 2 are rejected as outliers) from 2017-03-31.149 to 2017-04-16.280."
JPL Sentry1731R E M O V E DJPL:
2017 FO128NEODyS20102104-210971.01e-05-3.90-3.920NEODyS: "Based on 53 optical observations (of which 2 are rejected as outliers) from 2017-03-30.263 to 2017-04-16.343."
JPL Sentry17312104-210971.77113586e-05-3.65-3.670JPL:
2017 FN128NEODyS20102059-206427.97e-08-3.57-3.610NEODyS: "Based on 52 optical observations (of which 0 are rejected as outliers) from 2017-03-27.304 to 2017-04-16.189."
JPL Sentry17312059-206421.1198e-07-3.43-3.520JPL:
2017 DG16JPL Sentry17312074-2105290.0001522602853-6.24-6.310JPL: Computed at 09:19 today Pacific time based on 37 observations spanning 2.5680 days (2017-Feb-21.23575 to 2017-Feb-23.803759). Diameter approximately 0.004 km. from weighted mean H=29.45.
2016 WUJPL Sentry20402089-210932.553218e-06-7.11-7.110JPL: Computed at 13:17 today Pacific time based on 34 observations spanning 13.805 days (2016-Nov-18.46506 to 2016-Dec-02.270385). Diameter approximately 0.012 km. from weighted mean H=27.31.
2015 TC25NEODyS1556R E M O V E D-
2015 EG7JPL Sentry20102065-2115125.67855e-06-6.53-6.590JPL: Computed at 12:51 today Pacific time based on 72 observations spanning 5.3466 days (2015-Mar-15.29324 to 2015-Mar-20.63987). Diameter approximately 0.011 km. from weighted mean H=27.35.
2013 QM48JPL Sentry02442071-2116193.82875e-06-6.94-7.640JPL: Computed at 18:31 April 15th Pacific time based on 17 observations spanning 12.914 days (2013-Aug-30.46095 to 2013-Sep-12.374542). Diameter approximately 0.011 km. from weighted mean H=27.41.
2012 TVJPL Sentry17312070-2107133.055047e-06-5.55-5.780JPL: Computed at 10:00 today Pacific time based on 191 observations spanning 1.8162 days (2012-Oct-05.32361 to 2012-Oct-07.139772). Diameter approximately 0.031 km. from weighted mean H=25.19.
2012 RU16JPL Sentry23232036-208924.779e-08-7.71-7.920JPL: Computed at 16:19 today Pacific time based on 56 observations spanning 25.093 days (2012-Sep-15.34955 to 2012-Oct-10.44277). Diameter approximately 0.026 km. from weighted mean H=25.61.
2012 CUJPL Sentry01002040-210051.21208e-06-6.54-6.920JPL: Computed at 17:30 April 15th Pacific time based on 48 observations spanning 18.849 days (2012-Feb-02.40401 to 2012-Feb-21.2528). Diameter approximately 0.021 km. from weighted mean H=25.99.
2011 EL40JPL Sentry23232073-207318.559e-08-7.68-7.680JPL: Computed at 16:09 today Pacific time based on 30 observations spanning 4.1374 days (2011-Mar-10.24148 to 2011-Mar-14.37887). Diameter approximately 0.017 km. from weighted mean H=26.49.
2010 NHJPL Sentry21112089-209221.0007e-06-6.55-6.600JPL: Computed at 14:05 today Pacific time based on 63 observations spanning 14.818 days (2010-Jul-04.42235 to 2010-Jul-19.240805). Diameter approximately 0.025 km. from weighted mean H=25.68.
2009 WW7JPL Sentry15502050-2116234.4550898e-05-6.54-6.980JPL: Computed at 00:26 today Pacific time based on 28 observations spanning 3.9974 days (2009-Nov-19.23811 to 2009-Nov-23.23546). Diameter approximately 0.006 km. from weighted mean H=28.89.
2008 CJJPL Sentry15502061-210621.131082e-06-7.42-7.420JPL: Computed at 03:32 today Pacific time based on 13 observations spanning 1.0540 days (2008-Feb-02.24586 to 2008-Feb-03.299901). Diameter approximately 0.012 km. from weighted mean H=27.31.
2007 DS7JPL Sentry00202048-2114232.10660329e-05-5.19-5.410JPL: Computed at 17:09 April 15th Pacific time based on 25 observations spanning 4.2198 days (2007-Feb-21.19007 to 2007-Feb-25.4099). Diameter approximately 0.023 km. from weighted mean H=25.85.
2006 QK33JPL Sentry15502116-211615.709e-08-6.85-6.850JPL: Computed at 05:51 today Pacific time based on 15 observations spanning 7.1460 days (2006-Aug-23.24977 to 2006-Aug-30.39573). Diameter approximately 0.065 km. from weighted mean H=23.59.
2004 RU109JPL Sentry04162038-205358.379e-07-6.50-6.840JPL: Computed at 20:48 April 15th Pacific time based on 50 observations spanning 1.6270 days (2004-Sep-11.22715 to 2004-Sep-12.85414). Diameter approximately 0.017 km. from weighted mean H=26.50.
2004 FM4JPL Sentry22062116-211611.462e-08-7.82-7.820JPL: Computed at 14:43 today Pacific time based on 26 observations spanning 12.283 days (2004-Mar-19.34501 to 2004-Mar-31.62751). Diameter approximately 0.042 km. from weighted mean H=24.55.
2003 DW10JPL Sentry15502046-205828.695e-08-7.52-7.680JPL: Computed at 22:13 April 15th Pacific time based on 125 observations spanning 161.03 days (2003-Feb-26.2816 to 2003-Aug-06.30755). Diameter approximately 0.020 km. from weighted mean H=26.10.
2001 VBJPL Sentry15502023-202312.362e-09-3.95-3.950JPL: Computed at 00:40 today Pacific time based on 53 observations spanning 7.6643 days (2001-Nov-04.0703 to 2001-Nov-11.73463). Diameter approximately 0.730 km. from weighted mean H=18.32.

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 16 April '17

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

2323Noted that JPL Sentry has reposted 2011 EL40 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 RU16 risk assessment - see above
2206Noted that JPL Sentry has posted 2004 FM4 as an impact risk - see above
2111Noted that JPL Sentry has updated its 2010 NH risk assessment - see above
2040Noted that JPL Sentry has updated its 2016 WU risk assessment - see above
2010Noted that JPL Sentry has updated its 2015 EG7 risk assessment - see above
Noted that NEODyS has updated its 2017 FD157 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 updated its 2017 GM7 risk assessment - see above
Noted that NEODyS has removed 2017 GP6 as an impact risk - see above
1810Generated Traffic Report
1731Noted that JPL Sentry has updated its 2012 TV risk assessment - see above
Noted that JPL Sentry has updated its 2017 DG16 risk assessment - see above
Noted that JPL Sentry has removed 2017 FD157 as an impact risk - see above
Noted that JPL Sentry has updated its 2017 FN128 risk assessment - see above
Noted that JPL Sentry has updated its 2017 FO128 risk assessment - see above
Noted that JPL Sentry has updated its 2017 GM7 risk assessment - see above
Noted that JPL Sentry has updated its 2017 GP6 risk assessment - see above
1556Noted that NEODyS has removed 2015 TC25 as an impact risk - see above
Noted that NEODyS has updated its 2017 GM7 risk assessment - see above
Noted that NEODyS has updated its 2017 GP6 risk assessment - see above
Grabbed MPEC 2017-H05 - Daily Orbit Update - see above
1550Noted that JPL Sentry has reposted 2001 VB as an impact risk - see above
Noted that JPL Sentry has updated its 2003 DW10 risk assessment - see above
Noted that JPL Sentry has posted 2006 QK33 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 CJ risk assessment - see above
Noted that JPL Sentry has updated its 2009 WW7 risk assessment - see above
0416Noted that JPL Sentry has updated its 2004 RU109 risk assessment - see above
Grabbed MPEC 2017-H04 - Comet C/2017 E3 (Panstarrs) - see above
0307Grabbed MPEC 2017-H02 - Comet C/2017 E1 (Borisov) - see above
Grabbed MPEC 2017-H03 - Comet C/2017 E2 (Tsuchinshan) - see above
0244Noted that JPL Sentry has updated its 2013 QM48 risk assessment - see above
Grabbed MPEC 2017-H01 - Comet C/2017 D3 (ATLAS) - see above
0100Noted that JPL Sentry has updated its 2012 CU risk assessment - see above
0020Noted that JPL Sentry has updated its 2007 DS7 risk assessment - see above