Contents  on 16 August '19

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 16 August '19

One object reported inside ten LD

There's one minor object reported within ten lunar distances (LD) of Earth today. 2019 PJ passes us at 8.74 LD.

Neighborhood Traffic
Earth passage I D ~Size Distance today  Inside ten LD Notes
8.74 LD today 2019 PJ 57 m  8.74 LD Aug. 14 - 17 Earth closest at 0018 UTC
Approaching Traffic
2.7   LD Aug. 28* 2019 OU1 91 m  33.9 from 36.9 LD Aug. 25 - 31 Earth passage uncertainty +/- 22 mins.*

This report was generated at 1920 UTC with follow-up in today's DOU MPEC for departed objects 2019 PU and 2019 PT, plus older follow-up for two risk-listed objects: from May for 2019 FE and from 2017 for 2017 SE33.

Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting about transient natural objects that approach our planet's 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 temporal 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 16 August '19

The MPC's NEO Confirmation Page has 12 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had twelve objects listed. Of these, four were "one nighters." So far The Tracking News has counted a total of fourteen 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 16 August '19

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been eight MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2019-Q08 - "22:46 UT" - Comet C/2017 K5 (Panstarrs)

MPEC 2019-Q07 - "19:27 UT" - 2019 PG3

<< DOU on 16 August '19 >>  MPEC 2019-Q06 - "12:02 UT" - Daily Orbit Update

MPEC 2019-Q05 - "03:43 UT" - Comet A/2019 G2

MPEC 2019-Q04 - "03:41 UT" - Comet A/2018 V3

MPEC 2019-Q03 - "03:41 UT" - Comet C/2018 V2 (Trujillo-Sheppard)

MPEC 2019-Q02 - "03:38 UT" - Comet A/2017 U7

MPEC 2019-Q01 - "00:14 UT" - 2019 PF3

Observers  on 16 August '19

A total of 28 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 9 in MPECs 2019-Q06 & 2019-Q07 -- 2019 PY, 2019 PG3, 2019 PG1, 2019 PC2, 2019 OQ1, 2019 NL6, 2019 KX3, 2019 HC, 366746
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2019-Q02 -- 2017 U7
T08ATLAS Mauna Loa in Hawaii, 2 in MPECs 2019-Q02 & 2019-Q08 -- 2017 U7, C/2017 K5
Q68Blue Mountains Obs. in New South Wales, 1 in MPEC 2019-Q02 -- 2017 U7
160Castelmartini Obs. in Italy, 17 in MPEC 2019-Q06 -- 2019 LW1, 2019 GD3, 2016 PD1, 2016 NL15, 85709, 68950, 503960, 424089, 355256, 27346, 248926, 243025, 18172, 12538, 3102, 2100, 2059
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2019-Q02 -- 2017 U7
W84%program code "%" (14) via DECam in Chile, 1 in MPEC 2019-Q06 -- 2017 SE33
203GiaGa Obs. in Italy, 3 in MPEC 2019-Q06 -- 2019 GD3, 2016 NL15, 2013 CK89
J95Great Shefford Obs. in England, 3 in MPEC 2019-Q06 -- 2019 PX, 2019 PU, 2019 PT
Q62iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2019-Q04 -- 2018 V3
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2019-Q02 & 2019-Q04 -- 2018 V3, 2017 U7
D95Kurihara Obs. in Japan, 1 in MPEC 2019-Q04 -- 2018 V3
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2019-Q06 -- 105140
568^R. Wainscoat on Mauna Kea in Hawaii, 3 in MPECs 2019-Q01, 2019-Q06 & 2019-Q07 -- 2019 PR2, 2019 PG3, 2019 PF3
568_Marco Micheli on Mauna Kea in Hawaii, 4 in MPECs 2019-Q02, 2019-Q03, 2019-Q04 & 2019-Q05 -- 2019 G2, 2018 V3, C/2018 V2, 2017 U7
474Mt. John Obs. in New Zealand, 1 in MPEC 2019-Q02 -- 2017 U7
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2019-Q07 -- 2019 PG3
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2019-Q01 & 2019-Q07 -- 2019 PG3, 2019 PF3
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2019-Q07 -- 2019 PG3
323Perth Obs. in Western Australia, 1 in MPEC 2019-Q04 -- 2018 V3
233San Vito Obs. in Italy, 2 in MPEC 2019-Q06 -- 455432, 105140
C95SATINO-1 in France, 1 in MPEC 2019-Q06 -- 2013 CK89
G40!M. Kumrucu-Lohmiller in Massachusetts via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-Q06 -- 2013 CK89
W884G. Gasparovic in Croatia via Chile Obs. in Chile, 1 in MPEC 2019-Q02 -- 2017 U7
461SZTE Asteroid Program in Hungary, 1 in MPEC 2019-Q08 -- C/2017 K5
A16Tentlingen Obs. in Switzerland, 1 in MPEC 2019-Q06 -- 355256
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2019-Q06 -- 2019 FE
L01Visnjan Obs., 1 in MPEC 2019-Q07 -- 2019 PG3
C51WISE in Earth polar orbit, 1 in MPEC 2019-Q04 -- 2018 V3
I41Zwicky Transient Facility (ZTF) in southern California, 5 in MPECs 2019-Q06 & 2019-Q08 -- 2019 LW1, C/2017 K5, 467475, 243025, 6047
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 August '19

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2359 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 and NEODyS listings is 100 years, and both post impact solutions beyond that for some 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
2019 FEJPL Sentry16002095-211834.9048e-06-5.20-5.240JPL: Computed at 06:03 today Pacific time based on 206 observations spanning 53.935 days (2019-Mar-17.563057 to 2019-May-10.498334). Diameter approximately 0.050 km. from weighted mean H=24.17.

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 16 August '19

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

2301Grabbed MPEC 2019-Q08 - Comet C/2017 K5 (Panstarrs) - see above
2135Grabbed MPEC 2019-Q07 - 2019 PG3 - see above
1920Generated Traffic Report
1600Noted that JPL Sentry has updated its 2019 FE risk assessment - see above
Grabbed MPEC 2019-Q06 - Daily Orbit Update - see above
0404Grabbed MPEC 2019-Q01 - 2019 PF3 - see above
Grabbed MPEC 2019-Q02 - Comet A/2017 U7 - see above
Grabbed MPEC 2019-Q03 - Comet C/2018 V2 (Trujillo-Sheppard) - see above
Grabbed MPEC 2019-Q04 - Comet A/2018 V3 - see above
Grabbed MPEC 2019-Q05 - Comet A/2019 G2 - see above