Contents  on 16 May '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 May '17

Five objects reported inside ten LD

Today five transient natural objects are reported inside ten lunar distances (LD) of our home world, all of them beyond five LD and moving away. Of the two nearest, 2017 HU49 heads out from 5.80 to 5.92 LD and 2017 JM2 from 5.80 to 7.93 LD.

Earth passage I D ~Size Distance Today  Notes
0.14 LD May 42017 JB2 5 m  8.11 to 8.76 LD intruder, risk
2.57 LD May 122017 JA2 38 m  7.94 to 10.01 LD exits ten LD
3.71 LD May 112017 JX1 21 m  9.51 to 11.17 LD exits ten LD
5.09 LD yesterday2017 JM2 46 m  5.80 to 7.93 LD DOU
5.56 LD May 112017 HU49 18 m  5.80 to 5.92 LD DOU
Approaching
7.93 LD May 292017 CS 446 m  < 10 LD May 26, radar target - DOU

This report was updated at 2124 UTC with the discovery of already departed risk-listed 2017 JG3 (MPEC), which flew past us at 7.65 LD on May 10th. Your first local asteroids traffic report was generated at 1746 UTC with follow-up in today's DOU MPEC for three objects active in the traffic table here and for departed radar target 2014 JO25 (links) and distant 484402 2007 XH16.



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 May '17

The MPC's NEO Confirmation Page has 16 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had sixteen objects listed. Of these, seven were "one nighters." So far The Tracking News has counted a total of 28 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 16 May '17

Minor Planet Electronic Circulars

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


MPEC 2017-K08 - "18:18 UT" - 2017 JH3


MPEC 2017-K07 - "18:15 UT" - 2017 JG3


MPEC 2017-K06 - "18:12 UT" - 2017 JF3


MPEC 2017-K05 - "18:08 UT" - 2017 JE3


MPEC 2017-K04 - "18:04 UT" - 2017 JD3


MPEC 2017-K03 - "18:01 UT" - 2017 JC3


<< DOU on 16 May '17 >>  MPEC 2017-K02 - "12:03 UT" - Daily Orbit Update


MPEC 2017-K01 - "11:40 UT" - 2013 BR45

Observers  on 16 May '17

A total of 26 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2017-K06 -- 2017 JF3
H21Astronomical Research Obs. Westfield in Illinois, 26 in MPECs 2017-K02, 2017-K04, 2017-K05 & 2017-K06 -- 2017 JF3, 2017 JE3, 2017 JD3, 2017 HA1, 2017 GU6, 2017 GT5, 2017 GQ6, 2017 GB8, 2017 FW64, 2017 FC157, 2017 DS35, 2017 AC5, 2016 UE101, 2016 JP, 2016 BO1, 2015 ME54, 2005 MO13, 475665, 456651, 326946, 222073, 142561, 11398, 7888, 5879, 1917
160Castelmartini Obs. in Italy, 6 in MPEC 2017-K02 -- 40267, 370702, 248083, 10636, 5653, 4179
703Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2017-K02 & 2017-K06 -- 2017 JF3, 2013 CL118, 2010 JH88, 488803, 484517, 456651, 154144, 2329
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 15 in MPECs 2017-K02 & 2017-K03 -- 2017 JC3, 2017 JB, 2017 HV4, 2017 HU49, 2017 HU4, 2017 HR49, 2017 HN49, 2017 HH49, 2017 HH, 2017 GU6, 2017 GQ4, 2017 FT2, 2017 FS101, 2017 FO2, 2017 BC30
006Fabra Obs. in Spain, 1 in MPEC 2017-K02 -- 427643
734Farpoint Obs. in Kansas, 2 in MPECs 2017-K04 & 2017-K06 -- 2017 JF3, 2017 JD3
A17Guidestar Obs. in Germany, 2 in MPEC 2017-K02 -- 2017 DS35, 2017 AC5
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2017-K06 -- 2017 JF3
I89'Steven M. Tilley in Louisiana via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2017-K02 -- 2017 GQ6
Q622Marian Urbanik in Slovakia via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-K02 -- 2017 CS
Z43Landehen Obs., 1 in MPEC 2017-K02 -- 143404
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2017-K03 -- 2017 JC3
K38M57 Obs. in Italy, 2 in MPECs 2017-K02 & 2017-K04 -- 2017 JD3, 2017 HY50
118Modra Obs. in Slovakia, 1 in MPEC 2017-K02 -- 2329
G96Mt. Lemmon Survey (MLS) in Arizona, 15 in MPECs 2017-K01, 2017-K02, 2017-K04, 2017-K05, 2017-K06, 2017-K07 & 2017-K08 -- 2017 JH3, 2017 JG3, 2017 JF3, 2017 JE3, 2017 JD3, 2017 HH, 2017 AC5, 2016 WO1, 2016 JP, 2013 BR45, 483560, 391508, 222073, 190166, 16912
A13Naef Obs. in Switzerland, 2 in MPEC 2017-K02 -- 2017 DS35, 2015 ME54
F51Pan-STARRS 1 (PS1) in Hawaii, 7 in MPECs 2017-K02, 2017-K03 & 2017-K05 -- 2017 JE3, 2017 JC3, 2017 GQ6, 2012 HC34, 484402, 387505, 288592
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 9 in MPEC 2017-K02 -- 2017 CS, 2016 JP, 2014 JO25, 2013 CL118, 2008 YA, 54789, 467460, 138404, 7341
W25RMS Obs., 8 in MPECs 2017-K02, 2017-K04 & 2017-K06 -- 2017 JM2, 2017 JF3, 2017 JD3, 2017 HY50, 2016 WO1, 288592, 276468, 260141
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2017-K06 -- 2017 JF3
204Schiaparelli Obs. in Italy, 3 in MPECs 2017-K04, 2017-K06 & 2017-K08 -- 2017 JH3, 2017 JF3, 2017 JD3
691Spacewatch 0.9m telescope in Arizona, 9 in MPEC 2017-K02 -- 2017 HX3, 2017 FE1, 2016 WO1, 2014 NA64, 2014 JO25, 2014 JG78, 2011 KR12, 474231, 467460
291Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2017-K02 & 2017-K03 -- 2017 JC3, 2004 SW55, 2003 MD7, 2000 GW127
926Tenagra II Obs. in Arizona, 3 in MPECs 2017-K04, 2017-K06 & 2017-K07 -- 2017 JG3, 2017 JF3, 2017 JD3
C51WISE in Earth polar orbit, 4 in MPEC 2017-K02 -- 66400, 488450, 486607, 1864
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 May '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 JG3JPL Sentry20002084-208411.304e-07-7.42-7.420JPL: Computed at 12:47 today Pacific time based on 20 observations spanning 1.9181 days (2017-May-14.33931 to 2017-May-16.25738). Diameter approximately 0.025 km. from weighted mean H=25.66.
2017 HZ4NEODyS18042068-2116395.94e-05-5.04-5.080NEODyS: "Based on 36 optical observations (of which 1 are rejected as outliers) from 2017-04-26.445 to 2017-05-13.105."
2016 QY84NEODyS18042024-21161223.32e-06-8.69-9.060NEODyS: "Based on 8 optical observations (of which 0 are rejected as outliers) from 2016-08-29.285 to 2016-08-29.410."
2015 VK1NEODyS18042089-211161.81e-07-7.58-7.710NEODyS: "Based on 55 optical observations (of which 0 are rejected as outliers) from 2015-11-01.484 to 2015-11-09.183."
2015 FF36NEODyS18042049-210137.29e-08-7.91-8.230NEODyS: "Based on 54 optical observations (of which 0 are rejected as outliers) from 2015-03-14.350 to 2015-03-26.919."
2015 DQ224NEODyS18042032-20691124.17e-05-6.20-6.790NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2015-02-19.224 to 2015-02-19.355."
2014 UY57NEODyS18042061-209764.3e-07-7.64-8.150NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2014-10-25.320 to 2014-10-30.302."
2014 AG51NEODyS18042043-2114961.39e-04-6.19-6.530NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2014-01-10.227 to 2014-01-11.335."
2012 HB25NEODyS18042062-210231.34e-07-7.15-7.230NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2012-04-24.354 to 2012-05-11.258."
2011 UD21NEODyS1804211617.52e-07-8.37-8.370NEODyS: "Based on 90 optical observations (of which 2 are rejected as outliers) from 2011-10-18.420 to 2011-11-24.236."
2011 FQ16NEODyS18042066-210522.23e-07-8.32-8.320NEODyS: "Based on 16 optical observations (of which 1 are rejected as outliers) from 2011-03-28.311 to 2011-03-29.336."
2004 XG29NEODyS1804208912.41e-10-10.21-10.210NEODyS: "Based on 134 optical observations (of which 4 are rejected as outliers) from 2004-12-10.063 to 2005-01-15.356."

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 May '17

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

2124Updated Traffic Report
2000Noted that JPL Sentry has posted 2017 JG3 as an impact risk - see above
1914Grabbed MPEC 2017-K04 - 2017 JD3 - see above
Grabbed MPEC 2017-K05 - 2017 JE3 - see above
Grabbed MPEC 2017-K06 - 2017 JF3 - see above
Grabbed MPEC 2017-K07 - 2017 JG3 - see above
Grabbed MPEC 2017-K08 - 2017 JH3 - see above
1804Noted that NEODyS has reposted 2004 XG29 as an impact risk - see above
Noted that NEODyS has reposted 2011 FQ16 as an impact risk - see above
Noted that NEODyS has posted 2011 UD21 as an impact risk - see above
Noted that NEODyS has reposted 2012 HB25 as an impact risk - see above
Noted that NEODyS has posted 2014 AG51 as an impact risk - see above
Noted that NEODyS has reposted 2014 UY57 as an impact risk - see above
Noted that NEODyS has posted 2015 DQ224 as an impact risk - see above
Noted that NEODyS has reposted 2015 FF36 as an impact risk - see above
Noted that NEODyS has reposted 2015 VK1 as an impact risk - see above
Noted that NEODyS has posted 2016 QY84 as an impact risk - see above
Noted that NEODyS has updated its 2017 HZ4 risk assessment - see above
Grabbed MPEC 2017-K03 - 2017 JC3 - see above
1540Grabbed MPEC 2017-K01 - 2013 BR45 - see above
Grabbed MPEC 2017-K02 - Daily Orbit Update - see above