Contents  on 12 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 12 June '17

One object reported inside ten LD

One minor planet is known to be within ten lunar distances (LD) of our home world today. Risk-listed 2017 LD is outbound from 7.61 to 8.59 LD. Approaching Earth next, radar target 441987 2010 NY65 comes inside ten LD on June 22nd and NHATS target 2017 BS5 enters on July 16th, making its second visit this year.

This report was generated at 1820 UTC with the recovery of 2017 BS5 in today's DOU MPEC along with follow-up for departed radar targets 2017 CS and 418094 2007 WV4. And we have also added 441987 2010 NY65 to this reporting. It won't be visible to ground-based optical telescopes until around the time it enters our ten-LD reporting "bubble."

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 12 June '17

The MPC's NEO Confirmation Page has 4 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four objects listed. Of these, two were "one nighters." So far The Tracking News has counted a total of nineteen 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 12 June '17

Minor Planet Electronic Circulars

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

MPEC 2017-L64 - "18:34 UT" - 2013 RR98

MPEC 2017-L63 - "18:31 UT" - 2013 RQ98

MPEC 2017-L62 - "17:49 UT" - 2016 FS13

<< DOU on 12 June '17 >>  MPEC 2017-L61 - "11:59 UT" - Daily Orbit Update

MPEC 2017-L60 - "01:49 UT" - 2017 KD35

MPEC 2017-L59 - "01:23 UT" - 2017 LP

MPEC 2017-L58 - "01:20 UT" - 2017 KE35

Observers  on 12 June '17

A total of 30 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 16 in MPECs 2017-L59, 2017-L60 & 2017-L61 -- 2017 LP, 2017 KD35, 2017 CS, 2003 MT, 68950, 66391, 495331, 494710, 494706, 329774, 190166, 142561, 11398, 106589, 6063, 1980
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2017-L61 -- 494706
T08ATLAS Mauna Loa in Hawaii, 5 in MPEC 2017-L61 -- 66391, 495331, 494706, 418094, 222073
160Castelmartini Obs. in Italy, 13 in MPEC 2017-L61 -- 2017 CS, 2011 ED78, 495331, 494706, 222073, 190166, 163696, 100926, 7888, 4055, 3352, 2329, 1917
703Catalina Sky Survey in Arizona, 1 in MPEC 2017-L61 -- 494706
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2017-L58 -- 2017 KE35
Z45Cosmos Obs., 1 in MPEC 2017-L61 -- 494706
Z39Costa Teguise Obs. in the Canary Islands, 1 in MPEC 2017-L61 -- 6063
W847David Gerdes in Michigan via DECam in Chile, 2 in MPECs 2017-L63 & 2017-L64 -- 2013 RR98, 2013 RQ98
203GiaGa Obs. in Italy, 1 in MPEC 2017-L61 -- 494706
J95Great Shefford Obs. in England, 1 in MPEC 2017-L59 -- 2017 LP
695^Spacewatch via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2017-L60 -- 2017 KD35
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2017-L58 -- 2017 KE35
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2017-L59 & 2017-L60 -- 2017 LP, 2017 KD35
W92MASTER OAFA Obs., 1 in MPEC 2017-L61 -- 1036
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2017-L59 & 2017-L60 -- 2017 LP, 2017 KD35
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2017-L61 -- 2016 MK1
J69North Obs. in England, 1 in MPEC 2017-L61 -- 418094
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPECs 2017-L58, 2017-L59 & 2017-L61 -- 2017 LP, 2017 KE35, 494706
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2017-L61 -- 495331, 494706
W25RMS Obs., 5 in MPECs 2017-L59 & 2017-L61 -- 2017 LP, 2017 KR34, 66253, 142561, 106589
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2017-L59 -- 2017 LP
204Schiaparelli Obs. in Italy, 1 in MPEC 2017-L59 -- 2017 LP
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2017-L61 -- 495323, 494975
I52Steward Obs. Mt. Lemmon Station in Arizona, 2 in MPECs 2017-L59 & 2017-L60 -- 2017 LP, 2017 KD35
926Tenagra II Obs. in Arizona, 5 in MPECs 2017-L59 & 2017-L61 -- 2017 LP, 2017 HN3, 2016 YU8, 416584, 106589
A16Tentlingen Obs. in Switzerland, 1 in MPEC 2017-L61 -- 6063
W33Transit Dreams Obs., 2 in MPEC 2017-L61 -- 190166, 111253
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPECs 2017-L61 & 2017-L62 -- 2017 BS5, 2016 FS13
C51WISE in Earth polar orbit, 3 in MPECs 2017-L60 & 2017-L61 -- 2017 KD35, 409256, 175189
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 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.





Notes for Today's Latest Risk Assessments
2017 LDNEODyS16322045-21179341.05e-02-3.23-3.270NEODyS: "Based on 86 optical observations (of which 0 are rejected as outliers) from 2017-05-16.299 to 2017-06-10.446."

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 12 June '17

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

1835Grabbed MPEC 2017-L63 - 2013 RQ98 - see above
Grabbed MPEC 2017-L64 - 2013 RR98 - see above
1820Generated Traffic Report
1802Grabbed MPEC 2017-L62 - 2016 FS13 - see above
1632Noted that NEODyS has updated its 2017 LD risk assessment - see above
1333Grabbed MPEC 2017-L61 - Daily Orbit Update - see above
0229Grabbed MPEC 2017-L58 - 2017 KE35 - see above
Grabbed MPEC 2017-L59 - 2017 LP - see above
Grabbed MPEC 2017-L60 - 2017 KD35 - see above