Contents  on 15 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 15 April '17

Two objects reported inside ten LD

Two Solar-System small bodies are reported traveling within ten lunar distances (LD) of our planet today. NHATS target 2017 FT102 is outbound from 5.72 to 6.21 LD and 2017 FF128 heads away from 7.49 to 8.97 LD. Next known to be approaching, radar target 2014 JO25 slides inside ten LD on April 18th and radar target 2017 CS arrives on May 26th.

This report was generated at 1652 UTC with follow-up for 2017 CS in today's DOU MPEC along with astrometry from October 2015 for risk-listed NHATS/radar target 2015 TC25.



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 15 April '17

The MPC's NEO Confirmation Page has 35 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 35 objects listed. Of these, fourteen were "one nighters." So far The Tracking News has counted a total of 37 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 15 April '17

Minor Planet Electronic Circulars

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


<< DOU on 15 Apr. '17 >>  MPEC 2017-G95 - "12:00 UT" - Daily Orbit Update

Observers  on 15 April '17

A total of 21 observers appear in today's MPEC.

CodeObserver / observatory
705"Kristie Nault via Apache Point Obs. in New Mexico, 20 in MPEC 2017-G95 -- 2017 GU5, 2017 GS6, 2017 GQ6, 2017 GP6, 2017 GO5, 2017 GO4, 2017 GN4, 2017 GM6, 2017 FV128, 2017 FS101, 2017 FR2, 2017 FQ101, 2017 FO91, 2017 FM128, 2017 FF101, 2017 FE157, 2017 FE128, 2017 DB109, 2016 YU8, 2016 UW80
H21Astronomical Research Obs. Westfield in Illinois, 21 in MPEC 2017-G95 -- 2017 GO4, 2017 GM4, 2017 GK4, 2017 EG4, 2017 DB38, 2017 AC5, 2010 JH88, 2005 GB120, 90075, 54789, 475665, 252793, 220124, 143404, 137170, 11398, 8176, 4954, 3103, 2329, 1036
160Castelmartini Obs. in Italy, 13 in MPEC 2017-G95 -- 90075, 54789, 474231, 220124, 215588, 143404, 10636, 5653, 5626, 5604, 4055, 3352, 3103
B92Chinon Obs. in France, 1 in MPEC 2017-G95 -- 143404
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2017-G95 -- 2017 ES2
J27El Guijo Obs. in Spain, 1 in MPEC 2017-G95 -- 143404
H15ISON New Mexico Obs. in New Mexico, 2 in MPEC 2017-G95 -- 370307, 141018
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2017-G95 -- 2015 TC25
W92MASTER OAFA Obs., 1 in MPEC 2017-G95 -- 90075
K95MASTER-II Sutherland in South Africa, 2 in MPEC 2017-G95 -- 20460, 1864
932McCarthy Obs. in Connecticut, 1 in MPEC 2017-G95 -- 2017 GM4
C47Nonndorf Obs. in Austria, 1 in MPEC 2017-G95 -- 2017 GM4
D29Purple Mtn. Obs. Xuyi Station in China, 4 in MPEC 2017-G95 -- 2003 OV, 154555, 11398, 2329
W25RMS Obs., 6 in MPEC 2017-G95 -- 2017 GT5, 2017 GO4, 2017 FH101, 2017 CS, 260141, 138155
104San Marcello Pistoiese Obs. in Italy, 2 in MPEC 2017-G95 -- 2017 GT5, 2017 FM128
Y00SONEAR in Brazil, 2 in MPEC 2017-G95 -- 484795, 3122
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2017-G95 -- 2017 AP20
291Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2017-G95 -- 2017 GU5, 2017 GM7, 2017 GM4, 2016 VV3, 2006 JT
926Tenagra II Obs. in Arizona, 10 in MPEC 2017-G95 -- 2017 GT5, 2017 GO4, 2017 GG4, 2017 FS101, 2017 FH101, 2016 YU8, 2016 UL5, 86819, 487577, 20255
C51WISE in Earth polar orbit, 1 in MPEC 2017-G95 -- 53319
I15Wishing Star Obs. in Rhode Island, 3 in MPEC 2017-G95 -- 2017 FG128, 2017 AC5, 474231
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 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 GM7JPL Sentry15332035-2112134.32058e-07-2.75-2.870JPL: Computed at 08:01 today Pacific time based on 28 observations spanning 8.0332 days (2017-Apr-07.25669 to 2017-Apr-15.28988). Diameter approximately 0.667 km. from weighted mean H=18.53.
2017 GP6JPL Sentry15332028-208736.11097e-08-4.57-4.580JPL: Computed at 07:53 today Pacific time based on 25 observations spanning 8.8312 days (2017-Apr-05.54596 to 2017-Apr-14.377147). Diameter approximately 0.210 km. from weighted mean H=21.01.
2017 GM6JPL Sentry15332111-211323.144e-07-7.60-7.830JPL: Computed at 08:18 today Pacific time based on 26 observations spanning 9.0920 days (2017-Apr-05.34221 to 2017-Apr-14.4342). Diameter approximately 0.019 km. from weighted mean H=26.24.
2017 FZ2JPL Sentry02302101-210439.1544e-05-5.19-5.270JPL: Computed at 19:08 April 14th Pacific time based on 151 observations spanning 4.9481 days (2017-Mar-19.34252 to 2017-Mar-24.290593). Diameter approximately 0.016 km. from weighted mean H=26.69.
2016 WN7JPL Sentry15332095-209512.643e-06-7.33-7.330JPL: Computed at 01:36 today Pacific time based on 19 observations spanning 6.9531 days (2016-Nov-24.31821 to 2016-Dec-01.271331). Diameter approximately 0.009 km. from weighted mean H=27.89.
2016 TG94JPL Sentry22072096-2116166.9065594e-06-7.76-8.340JPL: Computed at 14:06 today Pacific time based on 12 observations spanning 1.0024 days (2016-Oct-09.39982 to 2016-Oct-10.40223). Diameter approximately 0.004 km. from weighted mean H=29.65.
2016 RR1JPL Sentry16062063-2113260.00020778597-5.41-5.720JPL: Computed at 08:47 today Pacific time based on 33 observations spanning 23.070 days (2016-Sep-04.42071 to 2016-Sep-27.491015). Diameter approximately 0.009 km. from weighted mean H=27.80.
2016 JB29JPL Sentry21032090-209011.696e-07-6.90-6.900JPL: Computed at 13:36 today Pacific time based on 146 observations spanning 119.20 days (2016-May-11.37449 to 2016-Sep-07.578036). Diameter approximately 0.039 km. from weighted mean H=24.71.
2016 EL1JPL Sentry15332068-210965.4003e-07-7.56-8.010JPL: Computed at 00:00 today Pacific time based on 26 observations spanning .62176 days (2016-Mar-03.3198 to 2016-Mar-03.94156). Diameter approximately 0.009 km. from weighted mean H=27.84.
2016 DK1JPL Sentry15332043-2115400.000185875629-4.92-5.380JPL: Computed at 06:05 today Pacific time based on 60 observations spanning 18.326 days (2016-Feb-27.16982 to 2016-Mar-16.495854). Diameter approximately 0.012 km. from weighted mean H=27.34.
2016 AF2JPL Sentry15332072-209362.598931e-07-8.17-8.220JPL: Computed at 02:03 today Pacific time based on 22 observations spanning 12.164 days (2016-Jan-01.17781 to 2016-Jan-13.341786). Diameter approximately 0.009 km. from weighted mean H=27.76.
2015 UH52JPL Sentry15332075-210241.1662e-06-6.58-6.940JPL: Computed at 22:44 April 14th Pacific time based on 75 observations spanning 14.798 days (2015-Oct-23.45412 to 2015-Nov-07.251926). Diameter approximately 0.022 km. from weighted mean H=25.96.
2015 TC25JPL Sentry15332112-211218.187e-07-8.71-8.710JPL: Computed at 08:28 today Pacific time based on 43 observations spanning 538.29 days (2015-Oct-11.29013 to 2017-Apr-01.581551). Diameter approximately 0.004 km. from weighted mean H=29.40.
2015 CL13JPL Sentry17362090-210646.4514e-07-6.63-7.020JPL: Computed at 10:10 today Pacific time based on 49 observations spanning 2.4735 days (2015-Feb-13.30705 to 2015-Feb-15.780574). Diameter approximately 0.025 km. from weighted mean H=25.66.
2014 WAJPL Sentry20002049-204911.794e-05-6.16-6.160JPL: Computed at 12:37 today Pacific time based on 52 observations spanning .60639 days (2014-Nov-16.26812 to 2014-Nov-16.87451). Diameter approximately 0.008 km. from weighted mean H=28.20.
2014 KC45JPL Sentry15332066-2110201.1608443e-05-7.25-7.710JPL: Computed at 01:58 today Pacific time based on 57 observations spanning 1.1236 days (2014-May-27.25325 to 2014-May-28.37681). Diameter approximately 0.004 km. from weighted mean H=29.39.
2014 JU15JPL Sentry05382079-2114865.62737145e-05-4.32-5.210JPL: Computed at 22:13 April 14th Pacific time based on 50 observations spanning 35.609 days (2014-Apr-29.30537 to 2014-Jun-03.91477). Diameter approximately 0.039 km. from weighted mean H=24.72.
2013 WZ44JPL Sentry17362111-211112.979e-06-6.11-6.110JPL: Computed at 10:25 today Pacific time based on 40 observations spanning 24.061 days (2013-Nov-28.411 to 2013-Dec-22.471507). Diameter approximately 0.025 km. from weighted mean H=25.69.
2012 MF7JPL Sentry15332046-2096120.000154392094-4.58-4.620JPL: Computed at 06:01 today Pacific time based on 26 observations spanning 29.055 days (2012-Jun-23.37429 to 2012-Jul-22.429464). Diameter approximately 0.015 km. from weighted mean H=26.84.
2012 BW13JPL Sentry15332086-211182.037043e-06-6.99-7.370JPL: Computed at 06:51 today Pacific time based on 34 observations spanning 5.6870 days (2012-Jan-19.20743 to 2012-Jan-24.89438). Diameter approximately 0.012 km. from weighted mean H=27.23.
2010 UKJPL Sentry21032068-2116430.000519135811-4.37-4.380JPL: Computed at 13:01 today Pacific time based on 79 observations spanning 14.713 days (2010-Oct-17.49652 to 2010-Nov-01.2099). Diameter approximately 0.014 km. from weighted mean H=26.85.
2009 TUJPL Sentry19012086-211171.86533e-05-5.93-6.470JPL: Computed at 11:36 today Pacific time based on 57 observations spanning 8.2739 days (2009-Oct-10.18978 to 2009-Oct-18.463635). Diameter approximately 0.011 km. from weighted mean H=27.36.
2008 STJPL Sentry15332047-2116230.0001636363-5.25-5.540JPL: Computed at 06:16 today Pacific time based on 49 observations spanning 7.1120 days (2008-Sep-22.16113 to 2008-Sep-29.27316). Diameter approximately 0.013 km. from weighted mean H=27.07.
2007 CS5JPL Sentry02302096-211043.1102e-07-6.73-7.150JPL: Computed at 18:55 April 14th Pacific time based on 19 observations spanning 16.324 days (2007-Feb-07.14605 to 2007-Feb-23.470021). Diameter approximately 0.042 km. from weighted mean H=24.52.
2005 XA8JPL Sentry02302063-2086213.58134692e-05-4.81-5.250JPL: Computed at 19:21 April 14th Pacific time based on 61 observations spanning 17.964 days (2005-Dec-06.31929 to 2005-Dec-24.28292). Diameter approximately 0.025 km. from weighted mean H=25.64.
2002 MNJPL Sentry20002070-210982.78851e-06-4.91-5.270JPL: Computed at 12:28 today Pacific time based on 86 observations spanning 53.081 days (2002-Jun-17.37897 to 2002-Aug-09.45951). Diameter approximately 0.073 km. from weighted mean H=23.32.

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 15 April '17

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

2207Noted that JPL Sentry has updated its 2016 TG94 risk assessment - see above
2103Noted that JPL Sentry has updated its 2010 UK risk assessment - see above
Noted that JPL Sentry has updated its 2016 JB29 risk assessment - see above
2000Noted that JPL Sentry has updated its 2002 MN risk assessment - see above
Noted that JPL Sentry has updated its 2014 WA risk assessment - see above
1901Noted that JPL Sentry has updated its 2009 TU risk assessment - see above
1736Noted that JPL Sentry has updated its 2013 WZ44 risk assessment - see above
Noted that JPL Sentry has updated its 2015 CL13 risk assessment - see above
1652Generated Traffic Report
1606Noted that JPL Sentry has updated its 2016 RR1 risk assessment - see above
1533Noted that JPL Sentry has updated its 2008 ST risk assessment - see above
Noted that JPL Sentry has updated its 2012 BW13 risk assessment - see above
Noted that JPL Sentry has updated its 2012 MF7 risk assessment - see above
Noted that JPL Sentry has updated its 2014 KC45 risk assessment - see above
Noted that JPL Sentry has reposted 2015 TC25 as an impact risk - see above
Noted that JPL Sentry has updated its 2015 UH52 risk assessment - see above
Noted that JPL Sentry has updated its 2016 AF2 risk assessment - see above
Noted that JPL Sentry has updated its 2016 DK1 risk assessment - see above
Noted that JPL Sentry has updated its 2016 EL1 risk assessment - see above
Noted that JPL Sentry has updated its 2016 WN7 risk assessment - see above
Noted that JPL Sentry has updated its 2017 GM6 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
Grabbed MPEC 2017-G95 - Daily Orbit Update - see above
0538Noted that JPL Sentry has updated its 2014 JU15 risk assessment - see above
0230Noted that JPL Sentry has updated its 2005 XA8 risk assessment - see above
Noted that JPL Sentry has updated its 2007 CS5 risk assessment - see above
Noted that JPL Sentry has updated its 2017 FZ2 risk assessment - see above