Contents  on 25 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 25 June '17

Four objects reported inside ten LD

Four asteroids are traveling within ten lunar distances (LD) of our planet today. Nearest is newly announced 2017 MA3, which is inbound from 5.81 to 4.24 LD.

Earth passage I D ~Size Distance Today  Notes
1.02 LD June 192017 MF 16 m  7.28 to 8.69 LD
3.23 LD June 272017 MA3 16 m  4.24 from 5.81 LD NEW - MPEC
5.00 LD June 302017 MB3 33 m  8.43 from 9.63 LD NEW - MPEC
7.89 LD yesterday441987 2010 NY65 170 m  8.16 to 9.29 LD radar target
Approaching
2.52 LD June 302017 MC1 42 m  < 10 LD June 27
3.12 LD July 232017 BS5 51 m  < 10 LD July 16, NHATS target
6.50 LD July 22017 MC3 52 m  < 10 LD June 30, NEW - MPEC

This report was generated at 1922 UTC with the recovery of 2014 SS1 (MPEC) announced late yesterday, and with the discoveries announced today of three objects active in the accompanying traffic table and of already departed 2017 MZ2 (MPEC), which passed us at 5.96 LD on June 15th. Today's DOU MPEC has follow-up for departed objects 2017 MD and radar target 2017 CS.



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 25 June '17

The MPC's NEO Confirmation Page has 87 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 87 objects listed. Of these, 35 were "one nighters." So far The Tracking News has counted a total of 107 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 25 June '17

Minor Planet Electronic Circulars

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


MPEC 2017-M68 - "21:47 UT" - 2015 HF9


MPEC 2017-M67 - "21:45 UT" - 2015 DU180


MPEC 2017-M66 - "18:08 UT" - 2015 OX78


MPEC 2017-M65 - "14:47 UT" - 2017 ME3


MPEC 2017-M64 - "14:44 UT" - 2017 MD3


MPEC 2017-M63 - "14:41 UT" - 2017 MC3


MPEC 2017-M62 - "14:38 UT" - 2017 MB3


MPEC 2017-M61 - "14:35 UT" - 2017 MA3


MPEC 2017-M60 - "14:31 UT" - 2017 MZ2


MPEC 2017-M59 - "14:28 UT" - 2017 MY2


MPEC 2017-M58 - "14:26 UT" - 2017 MX2


MPEC 2017-M57 - "14:22 UT" - 2017 MW2


MPEC 2017-M56 - "14:19 UT" - 2017 MV2


<< DOU on 25 June '17 >>  MPEC 2017-M55 - "11:59 UT" - Daily Orbit Update

Observers  on 25 June '17

A total of 25 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 2 in MPECs 2017-M62 & 2017-M64 -- 2017 MD3, 2017 MB3
H21Astronomical Research Obs. Westfield in Illinois, 4 in MPECs 2017-M55, 2017-M56, 2017-M57 & 2017-M66 -- 2017 MW2, 2017 MV2, 2015 OX78, 139047
T08ATLAS Mauna Loa in Hawaii, 4 in MPECs 2017-M55 & 2017-M62 -- 2017 MB3, 2017 CS, 2010 VB1, 190166
160Castelmartini Obs. in Italy, 8 in MPEC 2017-M55 -- 2017 CS, 2010 VB1, 68950, 416584, 232368, 141056, 136818, 106589
703Catalina Sky Survey in Arizona, 1 in MPEC 2017-M55 -- 7888
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPECs 2017-M57 & 2017-M60 -- 2017 MZ2, 2017 MW2
006Fabra Obs. in Spain, 1 in MPEC 2017-M55 -- 2102
734Farpoint Obs. in Kansas, 2 in MPECs 2017-M62 & 2017-M65 -- 2017 ME3, 2017 MB3
157Frasso Sabino Obs. in Italy, 2 in MPEC 2017-M55 -- 2010 VB1, 189263
K88GINOP-KHK in Hungary, 6 in MPECs 2017-M57, 2017-M61, 2017-M62, 2017-M63, 2017-M64 & 2017-M65 -- 2017 MW2, 2017 ME3, 2017 MD3, 2017 MC3, 2017 MB3, 2017 MA3
568_Marco Micheli on Mauna Kea in Hawaii, 4 in MPECs 2017-M56, 2017-M58, 2017-M60 & 2017-M63 -- 2017 MZ2, 2017 MX2, 2017 MV2, 2017 MC3
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2017-M55, 2017-M57, 2017-M59, 2017-M61 & 2017-M64 -- 2017 MY2, 2017 MW2, 2017 MJ, 2017 MD3, 2017 MA3, 2006 KA40, 185716
G34Oberfrauendorf Obs. in Germany, 2 in MPEC 2017-M55 -- 190166, 6063
F51Pan-STARRS 1 (PS1) in Hawaii, 25 in MPECs 2017-M55, 2017-M56, 2017-M57, 2017-M58, 2017-M60, 2017-M63, 2017-M65 & 2017-M68 -- 2017 MZ2, 2017 MX2, 2017 MW2, 2017 MV2, 2017 ME3, 2017 MC3, 2017 MB, 2015 HF9, 2014 SZ303, 2014 MY26, 2013 RE21, 2009 LW2, 2007 LC15, 86819, 468909, 454266, 453687, 256670, 232691, 154144, 153591, 152964, 6037, 5751, 4660
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 2 in MPECs 2017-M56 & 2017-M60 -- 2017 MZ2, 2017 MV2
W25RMS Obs., 5 in MPECs 2017-M57, 2017-M61, 2017-M62, 2017-M63 & 2017-M64 -- 2017 MW2, 2017 MD3, 2017 MC3, 2017 MB3, 2017 MA3
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2017-M61, 2017-M62, 2017-M63 & 2017-M65 -- 2017 ME3, 2017 MC3, 2017 MB3, 2017 MA3
204Schiaparelli Obs. in Italy, 3 in MPEC 2017-M55 -- 2010 VB1, 2003 MT, 494706
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2017-M55 & 2017-M56 -- 2017 MV2, 2017 HV4, 2013 CL118
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2017-M58 -- 2017 MX2
W34Squirrel Valley Obs. in North Carolina, 2 in MPEC 2017-M55 -- 163696, 142561
I93St. Pardon de Conques Obs. in France, 5 in MPECs 2017-M56, 2017-M59, 2017-M61, 2017-M62 & 2017-M63 -- 2017 MY2, 2017 MV2, 2017 MC3, 2017 MB3, 2017 MA3
I52Steward Obs. Mt. Lemmon Station in Arizona, 11 in MPECs 2017-M55, 2017-M56, 2017-M57, 2017-M58, 2017-M59, 2017-M60, 2017-M61, 2017-M62, 2017-M63, 2017-M64 & 2017-M65 -- 2017 MZ2, 2017 MY2, 2017 MX2, 2017 MW2, 2017 MV2, 2017 ME3, 2017 MD3, 2017 MD, 2017 MC3, 2017 MB3, 2017 MA3
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2017-M67 -- 2015 DU180
C51WISE in Earth polar orbit, 3 in MPEC 2017-M55 -- 2013 LB1, 456651, 333478
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 25 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 MB1NEODyS03382078-2117383.65e-07-3.19-3.520NEODyS: "Based on 77 optical observations (of which 0 are rejected as outliers) from 2017-06-19.315 to 2017-06-23.574."
2017 LUNEODyS0338205613.2e-06-2.34-2.340NEODyS: "Based on 54 optical observations (of which 0 are rejected as outliers) from 2017-06-08.757 to 2017-06-24.430."
2017 LDNEODyS03382048-21175902.16e-03-4.19-4.840NEODyS: "Based on 96 optical observations (of which 0 are rejected as outliers) from 2017-05-16.299 to 2017-06-21.614."

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 25 June '17

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

2209Grabbed MPEC 2017-M67 - 2015 DU180 - see above
Grabbed MPEC 2017-M68 - 2015 HF9 - see above
1922Generated Traffic Report
1912Grabbed MPEC 2017-M66 - 2015 OX78 - see above
1509Grabbed MPEC 2017-M55 - Daily Orbit Update - see above
Grabbed MPEC 2017-M56 - 2017 MV2 - see above
Grabbed MPEC 2017-M57 - 2017 MW2 - see above
Grabbed MPEC 2017-M58 - 2017 MX2 - see above
Grabbed MPEC 2017-M59 - 2017 MY2 - see above
Grabbed MPEC 2017-M60 - 2017 MZ2 - see above
Grabbed MPEC 2017-M61 - 2017 MA3 - see above
Grabbed MPEC 2017-M62 - 2017 MB3 - see above
Grabbed MPEC 2017-M63 - 2017 MC3 - see above
Grabbed MPEC 2017-M64 - 2017 MD3 - see above
Grabbed MPEC 2017-M65 - 2017 ME3 - see above
0338Noted that NEODyS has updated its 2017 LD risk assessment - see above
Noted that NEODyS has updated its 2017 LU risk assessment - see above
Noted that NEODyS has updated its 2017 MB1 risk assessment - see above