Contents  on 18 June '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 18 June '17

Two objects reported inside ten LD

Two minor objects are reported flying within ten lunar distances (LD) of our home world today. 2017 LV comes its closest to Earth on this passage -- 6.82 LD at 1330 UTC, and 2017 LX leaves our ten-LD traffic reporting "bubble," traveling from 7.97 to 12.29 LD. Next in the neighborhood, radar target 441987 2010 NY65 comes within ten LD on June 22nd and NHATS target 2017 BS5 on July 16th.

This report was generated at 2116 UTC with the discovery of already departed 2017 MD (MPEC), which passed us at 3.16 LD four days ago, and with follow-up in today's DOU MPEC for 2017 LV and departed radar target 418094 2007 WV4 plus astrometry from last month for radar target 2017 BQ6 and risk-listed 2017 KH5.



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 18 June '17

The MPC's NEO Confirmation Page has 5 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five objects listed. Of these, one was a "one nighter." So far The Tracking News has counted a total of thirteen 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 18 June '17

Minor Planet Electronic Circulars

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


MPEC 2017-M20 - "22:46 UT" - 2017 MF


MPEC 2017-M19 - "22:34 UT" - 2016 HL3


MPEC 2017-M18 - "22:19 UT" - 2017 ME


MPEC 2017-M17 - "17:55 UT" - 2017 MD


MPEC 2017-M16 - "17:52 UT" - 2017 LP1


MPEC 2017-M15 - "17:48 UT" - 2017 MC


MPEC 2017-M14 - "17:45 UT" - 2017 MB


MPEC 2017-M13 - "17:41 UT" - 2017 LO1


MPEC 2017-M12 - "16:33 UT" - Comet C/2017 K6 (Jacques)


MPEC 2017-M11 - "16:14 UT" - Comet C/2017 K4 (ATLAS)


MPEC 2017-M10 - "15:52 UT" - Comet C/2017 K2 (Panstarrs)


MPEC 2017-M09 - "15:27 UT" - Comet C/2015 ER61-B (Panstarrs)


<< DOU on 18 June '17 >>  MPEC 2017-M08 - "12:00 UT" - Daily Orbit Update

Observers  on 18 June '17

A total of 60 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 2 in MPECs 2017-M17 & 2017-M20 -- 2017 MF, 2017 MD
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPEC 2017-M08 -- 2017 LA, 2017 KE5, 2017 HW48, 2017 HN3, 2017 HA49, 2017 FW64, 2017 FJ90, 2017 BQ6, 2017 AC5, 66391, 494706, 275677, 142040, 11398, 7888
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2017-M15 -- 2017 MC
C77Bernezzo Obs. in Italy, 3 in MPECs 2017-M10, 2017-M17 & 2017-M18 -- 2017 ME, 2017 MD, C/2017 K2
V03Big Water Obs. in Utah, 1 in MPEC 2017-M10 -- C/2017 K2
B66Casasco Obs. in Italy, 2 in MPEC 2017-M08 -- 190166, 2102
160Castelmartini Obs. in Italy, 3 in MPECs 2017-M15, 2017-M17 & 2017-M20 -- 2017 MF, 2017 MD, 2017 MC
703Catalina Sky Survey (CSS) in Arizona, 14 in MPECs 2017-M08, 2017-M17, 2017-M18 & 2017-M20 -- 2017 MF, 2017 ME, 2017 MD, 2017 MA, 2011 ED78, 68348, 495331, 190166, 163696, 136818, 12538, 6063, 3352, 1917
A77Chante-Perdrix Obs. in France, 1 in MPEC 2017-M10 -- C/2017 K2
970Chelmsford Obs. in England, 1 in MPEC 2017-M10 -- C/2017 K2
106Crni Vrh Obs. in Slovenia, 2 in MPECs 2017-M17 & 2017-M20 -- 2017 MF, 2017 MD
958Dax Obs. in France, 1 in MPEC 2017-M17 -- 2017 MD
K77EHB01 Obs., 1 in MPEC 2017-M10 -- C/2017 K2
734Farpoint Obs. in Kansas, 1 in MPEC 2017-M13 -- 2017 LO1
595Farra d'Isonzo Obs. in Italy, 4 in MPECs 2017-M15, 2017-M17, 2017-M18 & 2017-M20 -- 2017 MF, 2017 ME, 2017 MD, 2017 MC
E10*program code "*" (19) via Faulkes Telescope South in New South Wales, 1 in MPEC 2017-M12 -- C/2017 K6
157Frasso Sabino Obs. in Italy, 2 in MPECs 2017-M10 & 2017-M17 -- 2017 MD, C/2017 K2
372Geisei Obs. in Japan, 1 in MPEC 2017-M10 -- C/2017 K2
D08Ghezz Obs. in Switzerland, 1 in MPEC 2017-M08 -- 190166
203GiaGa Obs. in Italy, 1 in MPEC 2017-M20 -- 2017 MF
K88GINOP-KHK in Hungary, 3 in MPECs 2017-M15, 2017-M17 & 2017-M20 -- 2017 MF, 2017 MD, 2017 MC
J95Great Shefford Obs. in England, 8 in MPECs 2017-M08, 2017-M10, 2017-M13, 2017-M14, 2017-M15, 2017-M17, 2017-M18 & 2017-M20 -- 2017 MF, 2017 ME, 2017 MD, 2017 MC, 2017 MB, 2017 LV, 2017 LO1, C/2017 K2
A17Guidestar Obs. in Germany, 1 in MPEC 2017-M20 -- 2017 MF
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2017-M20 -- 2017 MF
H06iTelescope Obs. Mayhill in New Mexico, 2 in MPECs 2017-M10 & 2017-M15 -- 2017 MC, C/2017 K2
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-M10 -- C/2017 K2
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-M15 -- 2017 MC
K38M57 Obs. in Italy, 1 in MPEC 2017-M15 -- 2017 MC
C10Maisoncelles Obs. in France, 1 in MPEC 2017-M10 -- C/2017 K2
474Mt. John Obs. in New Zealand, 14 in MPECs 2017-M08, 2017-M14, 2017-M16 & 2017-M17 -- 2017 MD, 2017 MB, 2017 LW, 2017 LP1, 2017 LG, 2017 KY34, 2017 KT34, 2017 KS31, 2017 KO27, 2017 JU2, 2017 HV4, 2017 HU4, 2017 DV37, 2013 OM9
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2017-M08, 2017-M13, 2017-M14, 2017-M16, 2017-M17, 2017-M18 & 2017-M20 -- 2017 MF, 2017 ME, 2017 MD, 2017 MB, 2017 LP1, 2017 LO1, 2013 BR45
K74Muensterschwarzach Obs. in Germany, 1 in MPEC 2017-M10 -- C/2017 K2
A13Naef Obs. in Switzerland, 1 in MPEC 2017-M08 -- 2017 DS35
J69North Obs. in England, 3 in MPECs 2017-M10, 2017-M15 & 2017-M17 -- 2017 MD, 2017 MC, C/2017 K2
Z80Northolt Branch Obs. in England, 1 in MPEC 2017-M10 -- C/2017 K2
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2017-M20 -- 2017 MF
C23Olmen Obs. in Belgium, 2 in MPECs 2017-M10 & 2017-M15 -- 2017 MC, C/2017 K2
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2017-M08, 2017-M10, 2017-M14 & 2017-M17 -- 2017 MD, 2017 MB, C/2017 K2, 222073, 154144
K63Pascoli Obs. in Italy, 2 in MPECs 2017-M15 & 2017-M17 -- 2017 MD, 2017 MC
B49Paus Obs. in Spain, 2 in MPECs 2017-M15 & 2017-M17 -- 2017 MD, 2017 MC
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2017-M08 -- 162452
W25RMS Obs., 10 in MPECs 2017-M08, 2017-M15, 2017-M17 & 2017-M18 -- 2017 ME, 2017 MD, 2017 MC, 2017 LW, 2017 LV, 2017 HV4, 366733, 142561, 142040, 106589
G39ROAD in Chile, 1 in MPEC 2017-M09 -- C/2015 ER61-B
867Saji Obs. in Japan, 1 in MPEC 2017-M10 -- C/2017 K2
104San Marcello Pistoiese Obs. in Italy, 5 in MPECs 2017-M14, 2017-M15, 2017-M17, 2017-M18 & 2017-M20 -- 2017 MF, 2017 ME, 2017 MD, 2017 MC, 2017 MB
B74Santa Maria de Montmagastrell Obs. in Spain, 3 in MPECs 2017-M15, 2017-M17 & 2017-M20 -- 2017 MF, 2017 MD, 2017 MC
C95SATINO-1 in France, 1 in MPEC 2017-M10 -- C/2017 K2
204Schiaparelli Obs. in Italy, 5 in MPECs 2017-M08, 2017-M15, 2017-M17 & 2017-M18 -- 2017 ME, 2017 MD, 2017 MC, 2017 LV, 2017 CJ1
K14Sencelles Obs. in Spain, 1 in MPEC 2017-M10 -- C/2017 K2
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-M08 -- 2017 MA
W883B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 2 in MPECs 2017-M11 & 2017-M12 -- C/2017 K6, C/2017 K4
Y00SONEAR in Brazil, 2 in MPECs 2017-M11 & 2017-M15 -- 2017 MC, C/2017 K4
587Sormano Obs. in Italy, 3 in MPECs 2017-M10, 2017-M18 & 2017-M20 -- 2017 MF, 2017 ME, C/2017 K2
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2017-M08, 2017-M13, 2017-M14 & 2017-M16 -- 2017 MB, 2017 LP1, 2017 LO1, 2017 LA
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2017-M08 -- 2017 KK3, 2016 YN1, 2016 AH193
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2017-M15 -- 2017 MC
I93St. Pardon de Conques Obs. in France, 5 in MPECs 2017-M14, 2017-M15, 2017-M17, 2017-M18 & 2017-M20 -- 2017 MF, 2017 ME, 2017 MD, 2017 MC, 2017 MB
A71Stixendorf Obs. in Austria, 1 in MPEC 2017-M10 -- C/2017 K2
461SZTE Asteroid Program in Hungary, 1 in MPEC 2017-M10 -- C/2017 K2
I66Taurus Australis Obs. in Brazil, 1 in MPEC 2017-M12 -- C/2017 K6
926Tenagra II Obs. in Arizona, 13 in MPECs 2017-M08, 2017-M09, 2017-M13, 2017-M14, 2017-M15, 2017-M16, 2017-M17, 2017-M18 & 2017-M19 -- 2017 ME, 2017 MD, 2017 MC, 2017 MB, 2017 LV, 2017 LP1, 2017 LO1, 2017 KH5, 2016 HL3, C/2015 ER61-B, 418094, 142561, 138846
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 18 June '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 LO1JPL Sentry20512019-21161577.84119900000001e-07-2.01-2.200JPL: Computed at 13:33 today Pacific time based on 32 observations spanning 3.6583 days (2017-Jun-14.3964 to 2017-Jun-18.05466). Diameter approximately 0.856 km. from weighted mean H=17.98.
2017 KH5NEODyS16192067-207433.5e-07-7.61-7.750NEODyS: "Based on 50 optical observations (of which 2 are rejected as outliers) from 2017-05-24.395 to 2017-05-25.370."
JPL Sentry15502067-207422.377e-07-7.80-8.090JPL: Computed at 07:53 today Pacific time based on 50 observations spanning .97523 days (2017-May-24.39387 to 2017-May-25.3691). Diameter approximately 0.010 km. from weighted mean H=27.59.

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 18 June '17

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

2256Grabbed MPEC 2017-M19 - 2016 HL3 - see above
Grabbed MPEC 2017-M20 - 2017 MF - see above
2230Grabbed MPEC 2017-M18 - 2017 ME - see above
2116Generated Traffic Report
2051Noted that JPL Sentry has posted 2017 LO1 as an impact risk - see above
1801Grabbed MPEC 2017-M13 - 2017 LO1 - see above
Grabbed MPEC 2017-M14 - 2017 MB - see above
Grabbed MPEC 2017-M15 - 2017 MC - see above
Grabbed MPEC 2017-M16 - 2017 LP1 - see above
Grabbed MPEC 2017-M17 - 2017 MD - see above
1650Grabbed MPEC 2017-M11 - Comet C/2017 K4 (ATLAS) - see above
Grabbed MPEC 2017-M12 - Comet C/2017 K6 (Jacques) - see above
1619Noted that NEODyS has updated its 2017 KH5 risk assessment - see above
Grabbed MPEC 2017-M10 - Comet C/2017 K2 (Panstarrs) - see above
1550Noted that JPL Sentry has updated its 2017 KH5 risk assessment - see above
Grabbed MPEC 2017-M08 - Daily Orbit Update - see above
Grabbed MPEC 2017-M09 - Comet C/2015 ER61-B (Panstarrs) - see above