Contents  on 11 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 11 August '19

Three objects reported inside ten LD

Today there are three minor planets reported passing within ten lunar distances (LD) of our planet. The nearest is newly announced 2019 PS1, which moves away from 3.48 to 5.43 LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41, 5.0 & 10.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
2.01 LD Aug. 9 2019 PS1 15 m  3.48 to 5.43 LD Aug. 5 - 14 NEW - MPEC
4.49 LD Aug. 5 2019 PT 22 m  9.07 to 10.30 LD July 29 - today exits ten LD
8.31 LD Aug. 7 2019 PU 24 m  9.84 to 10.63 LD Aug. 3 - 11 exits ten LD - DOU
Approaching Traffic - sorted by 10-LD bubble entry date
8.7   LD Aug. 16* 2019 PJ 56 m  15.5 from 18.2 LD Aug. 14 - 17 EPU +/- 30 mins.*
2.7   LD Aug. 28* 2019 OU1 90 m  49.3 from 52.4 LD Aug. 25 - 31 EPU +/- 41 mins.* - DOU
*EPU = Earth passage uncertainty

This report was generated at 1850 UTC with the discovery of outbound 2019 PS1 (MPEC) and with follow-up in today's DOU MPEC for approaching 2019 OU1, outbound 2019 PU, and departed objects 2019 PH1 and 2019 PC1.



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 11 August '19

The MPC's NEO Confirmation Page has 41 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 41 objects listed. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 51 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 11 August '19

Minor Planet Electronic Circulars

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


MPEC 2019-P85 - "22:26 UT" - 2006 QV89


MPEC 2019-P84 - "14:39 UT" - 2019 PW1


MPEC 2019-P83 - "14:29 UT" - 2019 PV1


<< DOU on 11 August '19 >>  MPEC 2019-P82 - "12:00 UT" - Daily Orbit Update


MPEC 2019-P81 - "03:58 UT" - 2019 PT1


MPEC 2019-P80 - "03:51 UT" - 2019 PS1


MPEC 2019-P79 - "03:25 UT" - 2019 PR1


MPEC 2019-P78 - "03:17 UT" - 2019 PQ1

Observers  on 11 August '19

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
A44Altschwendt Obs. in Austria, 1 in MPEC 2019-P82 -- 2019 PU
E23Arcadia Obs. in New South Wales, 1 in MPEC 2019-P82 -- 2019 PC1
H21Astronomical Research Obs. Westfield in Illinois, 10 in MPECs 2019-P79, 2019-P81, 2019-P82, 2019-P83 & 2019-P84 -- 2019 PW1, 2019 PV1, 2019 PT1, 2019 PR1, 2019 OQ1, 2019 NL6, 2019 MY3, 2019 KX3, 2003 FF5, 171839
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2019-P82 -- 2019 PU
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2019-P85 -- 2006 QV89
160Castelmartini Obs. in Italy, 13 in MPECs 2019-P80 & 2019-P82 -- 2019 PS1, 2019 OM, 2019 GD3, 2016 NL15, 85709, 429733, 243025, 18172, 5626, 3102, 2100, 2059, 1865
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2019-P82 -- 2019 OZ1
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2019-P83 -- 2019 PV1
595Farra d'Isonzo Obs. in Italy, 3 in MPECs 2019-P80 & 2019-P82 -- 2019 PS1, 2019 PH1, 2019 OM
K83Forti Obs., 2 in MPEC 2019-P82 -- 455432, 2059
L34Galhassin Robotic Telescope, 1 in MPEC 2019-P80 -- 2019 PS1
J95Great Shefford Obs. in England, 4 in MPECs 2019-P78, 2019-P80 & 2019-P82 -- 2019 PS1, 2019 PQ1, 2019 PK, 2019 OA2
A17Guidestar Obs. in Germany, 3 in MPEC 2019-P82 -- 2016 UD101, 2016 NL15, 2013 CK89
K93LCO Sutherland C in South Africa, 1 in MPEC 2019-P82 -- 2019 OU1
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2019-P82 -- 137170
V39MPC code V39, 1 in MPEC 2019-P82 -- 355256
Z80Northolt Branch Obs. in England, 1 in MPEC 2019-P80 -- 2019 PS1
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2019-P80 -- 2019 PS1
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPECs 2019-P78, 2019-P79, 2019-P81, 2019-P82, 2019-P83 & 2019-P84 -- 2019 PW1, 2019 PV1, 2019 PT1, 2019 PR1, 2019 PQ1, 2017 YF5
K19PASTIS Obs. in France, 1 in MPEC 2019-P82 -- 2019 PU
104San Marcello Pistoiese Obs. in Italy, 7 in MPECs 2019-P78, 2019-P79, 2019-P80, 2019-P82 & 2019-P83 -- 2019 PV1, 2019 PS1, 2019 PR1, 2019 PQ1, 2019 MK2, 2019 LW1, 2016 NL15
H36Sandlot Obs. in Kansas, 1 in MPEC 2019-P83 -- 2019 PV1
C95SATINO-1 in France, 3 in MPECs 2019-P80 & 2019-P82 -- 2019 PS1, 2019 PH1, 2016 NL15
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-P82 -- 2015 HB10
G40'W.F. Cashwell in Nevada via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-P82 -- 2016 NL15
W34Squirrel Valley Obs. in North Carolina, 2 in MPEC 2019-P82 -- 429733, 2059
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2019-P82 -- 2019 PU
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2019-P85 -- 2006 QV89
L01Visnjan Obs., 5 in MPECs 2019-P78, 2019-P79, 2019-P80, 2019-P81 & 2019-P83 -- 2019 PV1, 2019 PT1, 2019 PS1, 2019 PR1, 2019 PQ1
I41Zwicky Transient Facility (ZTF) in southern California, 7 in MPECs 2019-P80 & 2019-P82 -- 2019 PS1, 2019 PA, 2016 NL15, 2006 MA, 293054, 162273, 887
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 11 August '19

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 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.
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
2019 PO1NEODyS15302056-2114533.82e-06-6.99-7.420NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2019-08-09.532 to 2019-08-10.253."
2019 ND7NEODyS15302092-2117445.7e-06-3.42-4.180NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2019-07-07.588 to 2019-07-20.459."
2006 QV89JPL Sentry2358R E M O V E DJPL: Risk listing removed at 2349 UTC today

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 11 August '19

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

2358Noted that JPL Sentry has removed 2006 QV89 as an impact risk - see above
2306Grabbed MPEC 2019-P85 - 2006 QV89 - see above
1850Generated Traffic Report
1530Noted that NEODyS has updated its 2019 ND7 risk assessment - see above
Noted that NEODyS has posted 2019 PO1 as an impact risk - see above
Grabbed MPEC 2019-P82 - Daily Orbit Update - see above
Grabbed MPEC 2019-P83 - 2019 PV1 - see above
Grabbed MPEC 2019-P84 - 2019 PW1 - see above
0431Grabbed MPEC 2019-P78 - 2019 PQ1 - see above
Grabbed MPEC 2019-P79 - 2019 PR1 - see above
Grabbed MPEC 2019-P80 - 2019 PS1 - see above
Grabbed MPEC 2019-P81 - 2019 PT1 - see above