Contents  on 25 July '17

NOTE:  These A/CC news pages will update less often for an extended period. All discoveries and observing credits will be reported, but we may miss some interim impact risk assessments and undercount NEOCP efforts, and there may be some gaps in our traffic reporting for Earth's Busy Neighborhood.

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 July '17

Report not compiled

(Traffic Report not compiled for this day. Click on right arrow immediately above for tomorrow's report.)

Radar Astrometry  on 25 July '17

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 2323 UTC when the database was dated 25 July

NEOCP Activity  on 25 July '17

The MPC's NEO Confirmation Page has 33 listings

When last checked at 2344 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 33 objects listed. Of these, 26 were "one nighters." So far The Tracking News has counted a total of 37 listings on the NEOCP today.

New MPECs  on 25 July '17

Minor Planet Electronic Circulars

As of last check at 2346 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2017-O53 - "21:58 UT" - 2016 CT30


MPEC 2017-O52 - "17:48 UT" - 2017 OO1


MPEC 2017-O51 - "17:25 UT" - 2017 OP1


<< DOU on 25 July '17 >>  MPEC 2017-O50 - "11:59 UT" - Daily Orbit Update


MPEC 2017-O49 - "01:20 UT" - 2015 FH120


MPEC 2017-O48 - "01:18 UT" - 2014 QL433

Observers  on 25 July '17

A total of 33 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2017-O51 -- 2017 OP1
251Arecibo in Puerto Rico, 1 in radar -- 4179
H21Astronomical Research Obs. Westfield in Illinois, 17 in MPECs 2017-O50, 2017-O51, 2017-O52 & 2017-O53 -- 2017 OP1, 2017 OO1, 2017 LF, 2017 KU4, 2017 KP34, 2017 KL3, 2017 HW48, 2017 FH101, 2017 FD65, 2016 YU8, 2016 CT30, 495930, 368790, 275677, 17188, 142561, 6037
T05ATLAS Haleakala in Hawaii, 4 in MPEC 2017-O50 -- 2017 GQ6, 2006 KA40, 190166, 138925
T08ATLAS Mauna Loa in Hawaii, 4 in MPECs 2017-O50 & 2017-O52 -- 2017 OO1, 495959, 363024, 152964
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2017-O51 -- 2017 OP1
160Castelmartini Obs. in Italy, 24 in MPEC 2017-O50 -- 2017 NS5, 2017 MB1, 2017 CS, 2017 BM31, 2008 MH1, 66146, 53319, 416584, 366733, 294739, 265962, 232368, 20460, 190166, 143992, 142561, 142040, 141670, 141056, 136818, 11398, 106589, 7336, 1980
K65Cesena Obs. in Italy, 1 in MPEC 2017-O52 -- 2017 OO1
J27El Guijo Obs. in Spain, 3 in MPEC 2017-O50 -- 190166, 142561, 142040
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 5 in MPECs 2017-O48, 2017-O49, 2017-O50, 2017-O51 & 2017-O52 -- 2017 OP1, 2017 OO1, 2017 MB1, 2015 FH120, 2014 QL433
734Farpoint Obs. in Kansas, 1 in MPEC 2017-O52 -- 2017 OO1
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2017-O52 -- 2017 OO1
K88GINOP-KHK in Hungary, 1 in MPEC 2017-O52 -- 2017 OO1
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 4179
K73Gravina Obs. in Italy, 1 in MPEC 2017-O50 -- 190166
J95Great Shefford Obs. in England, 4 in MPECs 2017-O50, 2017-O51 & 2017-O52 -- 2017 OP1, 2017 OO1, 2017 OM1, 2017 MB1
238Grorudalen Obs. in Norway, 1 in MPEC 2017-O50 -- 138925
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2017-O50 -- 12538
J69North Obs. in England, 2 in MPECs 2017-O50 & 2017-O52 -- 2017 OO1, 2017 OL1
Z80Northolt Branch Obs. in England, 2 in MPEC 2017-O50 -- 2017 OL1, 142561
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPEC 2017-O50 -- 2015 QE9, 2008 AZ110, 265196
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 15 in MPEC 2017-O50 -- 2017 OL1, 2017 NM6, 2017 CS, 2017 BM31, 2014 YC15, 2014 SR339, 2011 NP, 2009 BF, 496018, 294739, 190166, 142561, 142040, 11398, 106589
D29Purple Mtn. Obs. Xuyi Station in China, 8 in MPEC 2017-O50 -- 2017 KR34, 2017 CS, 2011 ED78, 54789, 39796, 136818, 12538, 6063
W25RMS Obs., 1 in MPEC 2017-O52 -- 2017 OO1
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2017-O52 -- 2017 OO1
H36Sandlot Obs. in Kansas, 2 in MPECs 2017-O51 & 2017-O52 -- 2017 OP1, 2017 OO1
033Schwarzschild Obs. in Germany, 1 in MPEC 2017-O52 -- 2017 OO1
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-O50 -- 2017 LU
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-O52 -- 2017 OO1
Y00SONEAR in Brazil, 4 in MPEC 2017-O50 -- 438452, 232368, 159467, 3752
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2017-O50 -- 2012 CO46, 2006 QE
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2017-O50 -- 138925
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 3 in MPEC 2017-O50 -- 2017 CH1, 2016 VS5, 2016 TB18
Z92West Park Obs. in England, 1 in MPEC 2017-O50 -- 2017 CS
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 25 July '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2342 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 OO1JPL Sentry23232115-211513.845e-07-6.49-6.490JPL: Computed at 13:02 today Pacific time based on 64 observations spanning 1.8558 days (2017-Jul-23.36054 to 2017-Jul-25.21633). Diameter approximately 0.044 km. from weighted mean H=24.43.
2017 OM1JPL Sentry23232084-211351.9695361e-06-4.97-5.230JPL: Computed at 08:11 today Pacific time based on 101 observations spanning 2.4412 days (2017-Jul-22.50692 to 2017-Jul-24.948159). Diameter approximately 0.074 km. from weighted mean H=23.30.
NEODyS14162084-2117133.44e-06-4.74-5.090NEODyS: "Based on 99 optical observations (of which 4 are rejected as outliers) from 2017-07-22.508 to 2017-07-24.330."
2017 MB1JPL Sentry23232098-209811.907e-07-3.65-3.650JPL: Computed at 07:57 today Pacific time based on 414 observations spanning 35.795 days (2017-Jun-19.31418 to 2017-Jul-25.109676). Diameter approximately 0.590 km. from weighted mean H=18.80.
2012 TC4NEODyS14162020-2114593.12e-05-5.37-6.310NEODyS: "Based on 251 optical observations (of which 0 are rejected as outliers) from 2012-10-04.468 to 2012-10-11.749."

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 July '17

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

2323Noted that JPL Sentry has updated its 2017 MB1 risk assessment - see above
Noted that JPL Sentry has updated its 2017 OM1 risk assessment - see above
Noted that JPL Sentry has posted 2017 OO1 as an impact risk - see above
Grabbed MPEC 2017-O51 - 2017 OP1 - see above
Grabbed MPEC 2017-O52 - 2017 OO1 - see above
Grabbed MPEC 2017-O53 - 2016 CT30 - see above
Noted Radar Astrometry database update - see above
1416Noted that NEODyS has updated its 2012 TC4 risk assessment - see above
Noted that NEODyS has posted 2017 OM1 as an impact risk - see above
Grabbed MPEC 2017-O50 - Daily Orbit Update - see above
0155Grabbed MPEC 2017-O48 - 2014 QL433 - see above
Grabbed MPEC 2017-O49 - 2015 FH120 - see above