Contents  on 12 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 12 August '19

One object reported inside ten LD

One transient natural object is known to be inside ten lunar distances (LD) of Earth today. 2019 PS1 recedes from 5.43 to 7.52 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  5.43 to 7.52 LD Aug. 5 - 14 DOU
Approaching Traffic - sorted by 10-LD bubble entry date
8.7   LD Aug. 16* 2019 PJ 56 m  13.0 from 15.5 LD Aug. 14 - 17 EPU +/- 30 mins.*
2.7   LD Aug. 28* 2019 OU1 90 m  46.1 from 49.2 LD Aug. 25 - 31 EPU +/- 22 mins.* - DOU
*EPU = Earth passage uncertainty

This report was generated at 1811 UTC with follow-up in today's DOU MPEC for outbound 2019 PS1 and approaching 2019 OU1.



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 12 August '19

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 50 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 August '19

Minor Planet Electronic Circulars

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


MPEC 2019-P95 - "22:34 UT" - 2019 PM2


MPEC 2019-P94 - "20:14 UT" - 2019 PK2


MPEC 2019-P93 - "16:32 UT" - 2017 SJ20


MPEC 2019-P92 - "16:31 UT" - 2015 SV2


MPEC 2019-P91 - "15:39 UT" - 2019 OF5


MPEC 2019-P90 - "12:23 UT" - 2019 PE2


<< DOU on 12 August '19 >>  MPEC 2019-P89 - "12:01 UT" - Daily Orbit Update


MPEC 2019-P88 - "04:14 UT" - 2019 PD2


MPEC 2019-P87 - "04:09 UT" - 2019 PC2


MPEC 2019-P86 - "03:59 UT" - 2019 PB2

Observers  on 12 August '19

Nineteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPECs 2019-P86, 2019-P87, 2019-P88 & 2019-P89 -- 2019 PS1, 2019 PQ1, 2019 PD2, 2019 PC2, 2019 PB2
T05ATLAS Haleakala in Hawaii, 36 in MPEC 2019-P89 -- 89830, 65733, 526825, 516154, 458732, 442243, 424089, 42286, 405212, 401857, 355256, 354030, 340666, 326777, 294739, 293054, 250614, 248926, 243025, 237805, 18172, 173561, 162269, 159454, 152754, 143637, 12538, 112221, 105140, 5786, 5626, 3753, 3102, 2100, 2059, 1865
T08ATLAS Mauna Loa in Hawaii, 25 in MPEC 2019-P89 -- 90403, 89830, 89355, 85709, 52750, 523972, 516154, 450160, 447903, 434786, 429733, 424089, 354030, 294739, 293054, 248926, 243025, 231134, 163051, 153842, 152754, 7482, 3753, 2059, 1865
160Castelmartini Obs. in Italy, 9 in MPEC 2019-P89 -- 2019 GD3, 2017 YT5, 455432, 429733, 355256, 27346, 173561, 12538, 2059
595Farra d'Isonzo Obs. in Italy, 3 in MPEC 2019-P89 -- 2019 PK, 2019 OU1, 2014 QK433
K88GINOP-KHK in Hungary, 1 in MPEC 2019-P90 -- 2019 PE2
568^R. Wainscoat on Mauna Kea in Hawaii, 3 in MPECs 2019-P86, 2019-P90 & 2019-P95 -- 2019 PM2, 2019 PE2, 2019 PB2
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2019-P93 -- 2017 SJ20
F51Pan-STARRS 1 (PS1) in Hawaii, 33 in MPECs 2019-P86, 2019-P87, 2019-P88, 2019-P89, 2019-P90, 2019-P91, 2019-P92, 2019-P93, 2019-P94 & 2019-P95 -- 2019 PM2, 2019 PK2, 2019 PE2, 2019 PD2, 2019 PC2, 2019 PB2, 2019 OF5, 2019 NZ2, 2017 SJ20, 2016 WD10, 2015 SV2, 2015 RD2, 2006 QV89, 503960, 471487, 470951, 461912, 450293, 441058, 378610, 340666, 326777, 307161, 303262, 220839, 162162, 143637, 142555, 138859, 6047, 4503, 3102, 2201
F52Pan-STARRS 2 (PS2) in Hawaii, 14 in MPECs 2019-P89, 2019-P94 & 2019-P95 -- 2019 PM2, 2019 PK2, 85713, 516986, 482798, 481984, 470951, 413820, 292165, 276397, 275677, 209924, 162181, 6455
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2019-P88 -- 2019 PD2
H36Sandlot Obs. in Kansas, 1 in MPEC 2019-P88 -- 2019 PD2
C95SATINO-1 in France, 1 in MPEC 2019-P89 -- 2016 PD1
291Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2019-P88 & 2019-P89 -- 2019 PD2, 2019 OU1, 2017 AM4, 2014 QO296
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2019-P89 -- 455432
A16Tentlingen Obs. in Switzerland, 3 in MPEC 2019-P89 -- 52750, 455432, 293054
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 4 in MPEC 2019-P89 -- 2019 PG, 2019 OV3, 2019 OU3, 2019 OR1
L01Visnjan Obs., 4 in MPECs 2019-P86, 2019-P87, 2019-P88 & 2019-P95 -- 2019 PM2, 2019 PD2, 2019 PC2, 2019 PB2
I41Zwicky Transient Facility (ZTF) in southern California, 4 in MPEC 2019-P89 -- 2019 NV, 90403, 85839, 243025
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 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 PGJPL Sentry15302084-2119114.0592504e-05-4.93-4.970JPL: Computed at 06:05 today Pacific time based on 16 observations spanning 7.0308 days (2019-Aug-04.39459 to 2019-Aug-11.425373). Diameter approximately 0.026 km. from weighted mean H=25.58.
NEODyS15302084-2118223.48e-05-4.99-5.040NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2019-08-04.395 to 2019-08-07.215."
2019 OF5JPL Sentry18012049-205249.7665e-09-8.13-8.360JPL: Computed at 10:05 today Pacific time based on 6 observations spanning 2.0193 days (2019-Jul-26.281469 to 2019-Jul-28.30076). Diameter approximately 0.031 km. from weighted mean H=25.22.
2019 OV3JPL Sentry15302105-210512.274e-08-7.40-7.400JPL: Computed at 06:11 today Pacific time based on 29 observations spanning 15.911 days (2019-Jul-26.532225 to 2019-Aug-11.442914). Diameter approximately 0.053 km. from weighted mean H=24.03.
NEODyS1530210513.31e-08-7.27-7.270NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2019-07-26.533 to 2019-08-11.444."
2019 OU3JPL Sentry1530R E M O V E DJPL: Risk listing removed at 1302 UTC today
NEODyS1530R E M O V E D-
2019 OR1JPL Sentry1530R E M O V E DJPL: Risk listing removed at 1309 UTC today
NEODyS1530R E M O V E D-
2006 QV89NEODyS1530R E M O V E D-

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 August '19

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

2318Grabbed MPEC 2019-P95 - 2019 PM2 - see above
2221Grabbed MPEC 2019-P94 - 2019 PK2 - see above
1811Generated Traffic Report
1801Noted that JPL Sentry has posted 2019 OF5 as an impact risk - see above
Grabbed MPEC 2019-P93 - 2017 SJ20 - see above
1632Grabbed MPEC 2019-P91 - 2019 OF5 - see above
Grabbed MPEC 2019-P92 - 2015 SV2 - see above
1530Noted that NEODyS has removed 2006 QV89 as an impact risk - see above
Noted that JPL Sentry has removed 2019 OR1 as an impact risk - see above
Noted that NEODyS has removed 2019 OR1 as an impact risk - see above
Noted that JPL Sentry has removed 2019 OU3 as an impact risk - see above
Noted that NEODyS has removed 2019 OU3 as an impact risk - see above
Noted that JPL Sentry has posted 2019 OV3 as an impact risk - see above
Noted that NEODyS has updated its 2019 OV3 risk assessment - see above
Noted that JPL Sentry has updated its 2019 PG risk assessment - see above
Noted that NEODyS has updated its 2019 PG risk assessment - see above
Grabbed MPEC 2019-P89 - Daily Orbit Update - see above
Grabbed MPEC 2019-P90 - 2019 PE2 - see above
0432Grabbed MPEC 2019-P87 - 2019 PC2 - see above
Grabbed MPEC 2019-P88 - 2019 PD2 - see above
0401Grabbed MPEC 2019-P86 - 2019 PB2 - see above