Contents  on 30 July '16

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 30 July '16

One object reported inside ten LD

One transient natural object is reported within ten lunar distances (LD) of our planet today. NHATS target 2005 OH3 is calculated with great uncertainty to be outbound from 6.8 to 6.4 LD*.

This report was updated at 2110 UTC with new discovery 2016 OV (MPEC), which will enter our ten-LD reporting zone on August 5th, coming to about 9.0 LD* at its closest. The day's first traffic report was generated at 1809 UTC with follow-up in today's DOU MPEC for departed 2016 OF and two risk-listed NHATS targets: departed 2016 NL39 and distant 2015 KE.

Note: After various delays we are nearly caught up on data collection and processing for this month. And, as of late yesterday, we have finally solved problems that badly interfered with our internal handling of unprecedentedly high-numbered MPECs (above 359) since July 26th. Rather than just skipping the last nine days of missed traffic reporting or trying to recap so much information all in today's report, we will be back-posting daily reports soon in their respective locations, starting with July 21st.



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. "LD*" indicates some uncertainty in object passage time and distance. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 30 July '16

The MPC's NEO Confirmation Page has 32 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 32 objects listed. Of these, twelve were "one nighters." So far The Tracking News has counted a total of 38 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 30 July '16

Minor Planet Electronic Circulars

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


MPEC 2016-O410 - "18:45 UT" - 2016 OV


<< DOU on 30 July '16 >>  MPEC 2016-O409 - "12:03 UT" - Daily Orbit Update

Observers  on 30 July '16

A total of 23 observers appear in today's MPECs.

CodeObserver / observatory
705"Kristie Nault via Apache Point Obs. in New Mexico, 4 in MPECs 2016-O409 & 2016-O410 -- 2016 OV, 2015 RV36, 2012 RO1, 2012 LD1
H21Astronomical Research Obs. Westfield in Illinois, 13 in MPECs 2016-O409 & 2016-O410 -- 2016 OV, 2016 NT32, 2016 NR, 2016 NL39, 2016 LU48, 2016 LM11, 2016 LA2, 2016 KW3, 2014 RC11, 2014 OL339, 2013 SC25, 2013 OM2, 2003 SR15
T05ATLAS Haleakala in Hawaii, 3 in MPEC 2016-O409 -- 68346, 138847, 105140
703Catalina Sky Survey in Arizona, 1 in MPEC 2016-O409 -- 2016 AO165
G58Chabot Obs. in northern California, 1 in MPEC 2016-O409 -- 2016 NF23
K73Gravina Obs. in Italy, 2 in MPEC 2016-O409 -- 154244, 433
511Haute Provence Obs. in Germany, 5 in MPEC 2016-O409 -- 2016 OF, 2016 NX22, 2016 NW22, 2016 NF33, 2016 NB39
W19Kalamazoo Obs. in Michigan, 2 in MPEC 2016-O409 -- 137170, 1866
Z22MASTER IAC Obs. in the Canary Islands, 4 in MPEC 2016-O409 -- 87311, 468741, 18882, 433
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2016-O409 -- 2016 NL39
474Mt. John Obs. in New Zealand, 3 in MPEC 2016-O409 -- 2016 NW15, 2016 NF33, 2016 NF
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2016-O409 -- 2016 NW22
C47Nonndorf Obs. in Austria, 1 in MPEC 2016-O409 -- 154244
C27Pallerols Obs. in Spain, 1 in MPEC 2016-O409 -- 68350
F51Pan-STARRS 1 (PS1) in Hawaii, 15 in MPECs 2016-O409 & 2016-O410 -- 2016 OV, 2016 NW22, 2016 MS, 2016 JB29, 2016 AV65, 2016 AJ8, 2016 AF193, 2016 AA9, 2015 KE, 2013 NV6, 2008 OS7, 86067, 347813, 277127, 2201
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2016-O409 -- 3352
B38Santa Mama Obs. in Italy, 2 in MPEC 2016-O409 -- 2016 LZ10, 2016 LE9
204Schiaparelli Obs. in Italy, 1 in MPEC 2016-O409 -- 2016 CL264
K14Sencelles Obs. in Spain, 1 in MPEC 2016-O409 -- 2016 LZ10
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2016-O409 -- 2016 NW22
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2016-O409 -- 2016 NW22
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2016-O409 -- 154244
926Tenagra II Obs. in Arizona, 1 in MPEC 2016-O409 -- 2016 AL65
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 July '16

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL 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 JPL NEO Program 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
2016 OVJPL Sentry22052083-210321.0e-07-6.97-6.970JPL: "Analysis based on 11 observations spanning 1.8492 days (2016-Jul-28.3101 to 2016-Jul-30.159317)." Diameter approximately 0.037 km. from mean, weighted H=24.8.
2016 NL39NEODyS22052067-21161125.15e-03-3.78-3.940NEODyS #2 for the day: "Based on 45 optical observations (of which 0 are rejected as outliers) from 2016-07-13.464 to 2016-07-29.486."
JPL Sentry15442055-2116561.4e-03-4.35-4.650JPL: "Analysis based on 45 observations spanning 16.022 days (2016-Jul-13.462934 to 2016-Jul-29.485058)." Diameter approximately 0.011 km. from mean, weighted H=27.5.
2016 JB29NEODyS22052090-210952.07e-06-5.83-6.130NEODyS #2 for the day: "Based on 142 optical observations (of which 4 are rejected as outliers) from 2016-05-11.375 to 2016-07-28.623."
JPL Sentry15442081-209745.4e-07-6.41-6.440JPL: "Analysis based on 134 observations spanning 78.248 days (2016-May-11.37449 to 2016-Jul-28.622454)." Diameter approximately 0.038 km. from mean, weighted H=24.7.
2015 KENEODyS2205R E M O V E DNEODyS #2 for the day

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 30 July '16

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

2205Noted that NEODyS has removed 2015 KE as an impact risk - see above
Noted that NEODyS has updated its 2016 JB29 risk assessment - see above
Noted that NEODyS has updated its 2016 NL39 risk assessment - see above
Noted that JPL Sentry has posted 2016 OV as an impact risk - see above
2110Updated Traffic Report
1907Grabbed MPEC 2016-O410 - 2016 OV - see above
1544Noted that NEODyS has updated its 2015 KE risk assessment - see above
Noted that JPL Sentry has updated its 2016 JB29 risk assessment - see above
Noted that NEODyS has updated its 2016 JB29 risk assessment - see above
Noted that JPL Sentry has updated its 2016 NL39 risk assessment - see above
Noted that NEODyS has updated its 2016 NL39 risk assessment - see above
Grabbed MPEC 2016-O409 - Daily Orbit Update - see above