Contents  on 29 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 29 August '19

Five objects reported inside ten LD

There are five asteroids reported less than ten lunar distances (LD) from Earth today. 2019 OU1 is the nearest, heading out from 3.14 to 5.28 LD, while newly announced 2019 QU4 comes in from 5.90 to 4.95 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
1.7   LD Aug. 24* 2019 QU3 6 m  6.7 to 8.2 LD Aug. 17 - 31 EPU +/- 27 mins.*, NHATS target, risk
2.68 LD yesterday 2019 OU1 97 m  3.14 to 5.28 LD Aug. 25 - 31 DOU
4.61 LD tomorrow 2019 QU4 37 m  4.95 from 5.90 LD Aug. 26 - Sept. 4 NEW - MPEC
5.49 LD yesterday 2019 QS 37 m  6.62 to 10.34 LD Aug. 26 - 29 exits ten LD, risk
5.67 LD tomorrow 2019 QR3 13 m  5.73 from 6.60 LD Aug. 27 - Sept. 2 risk - DOU
Approaching Traffic - sorted by 10-LD bubble entry date
5.88 LD Aug. 31 2019 QD4 22 m  11.31 from 15.86 LD tomorrow - Sept. 2 NEW - MPEC
9.7   LD Sept. 9* 2019 QZ3 36 m  20.1 from 21.7 LD Sept. 7 - 10 EPU +/- 5 mins.*, NHATS target
* EPU = Earth passage uncertainty

This report was updated at 2310 UTC with the discovery of inbound 2019 QU4 (MPEC). Your first local flying rock traffic report was generated at 1910 UTC with the discovery of approaching 2019 QD4 (MPEC) and with follow-up in today's DOU MPEC for inbound risk-listed 2019 QR3, outbound 2019 OU1, and three departed objects: 2019 QP2, risk-listed 2019 QF, and risk-listed intruder 2019 QB1.



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. "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 29 August '19

The MPC's NEO Confirmation Page has 94 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 94 objects listed. Of these, 41 were "one nighters." So far The Tracking News has counted a total of 125 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 29 August '19

Minor Planet Electronic Circulars

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


MPEC 2019-Q121 - "20:39 UT" - 2019 QX4


MPEC 2019-Q120 - "20:35 UT" - 2019 QW4


MPEC 2019-Q119 - "20:32 UT" - 2019 QV4


MPEC 2019-Q118 - "20:25 UT" - 2019 QU4


MPEC 2019-Q117 - "15:37 UT" - 2019 QT4


MPEC 2019-Q116 - "13:53 UT" - 2019 QL4


MPEC 2019-Q115 - "13:49 UT" - 2019 QK4


MPEC 2019-Q114 - "13:46 UT" - 2019 QJ4


MPEC 2019-Q113 - "13:43 UT" - 2019 QH4


MPEC 2019-Q112 - "13:04 UT" - 2019 QE4


MPEC 2019-Q111 - "12:59 UT" - 2018 AG12


MPEC 2019-Q110 - "12:54 UT" - 2019 QD4


MPEC 2019-Q109 - "12:52 UT" - 2019 QC4


<< DOU on 29 August '19 >>  MPEC 2019-Q108 - "12:02 UT" - Daily Orbit Update

Observers  on 29 August '19

A total of 41 observers appear in today's MPECs.

CodeObserver / observatory
A44Altschwendt Obs. in Austria, 4 in MPECs 2019-Q116, 2019-Q118, 2019-Q119 & 2019-Q120 -- 2019 QW4, 2019 QV4, 2019 QU4, 2019 QL4
E23Arcadia Obs. in New South Wales, 2 in MPECs 2019-Q114 & 2019-Q116 -- 2019 QL4, 2019 QJ4
H21Astronomical Research Obs. Westfield in Illinois, 17 in MPECs 2019-Q108, 2019-Q109, 2019-Q110, 2019-Q111, 2019-Q112, 2019-Q113, 2019-Q115, 2019-Q116, 2019-Q117, 2019-Q118, 2019-Q119, 2019-Q120 & 2019-Q121 -- 2019 QX4, 2019 QW4, 2019 QV4, 2019 QV1, 2019 QU4, 2019 QU, 2019 QT4, 2019 QL4, 2019 QK4, 2019 QK, 2019 QH4, 2019 QE4, 2019 QD4, 2019 QC4, 2019 PG1, 2019 HC, 2018 AG12
T08ATLAS Mauna Loa in Hawaii, 4 in MPECs 2019-Q114, 2019-Q116, 2019-Q119 & 2019-Q120 -- 2019 QW4, 2019 QV4, 2019 QL4, 2019 QJ4
Z84Calar Alto Schmidt in Spain, 4 in MPECs 2019-Q108, 2019-Q114, 2019-Q116 & 2019-Q117 -- 2019 QT4, 2019 QL4, 2019 QJ4, 2006 SE6
160Castelmartini Obs. in Italy, 1 in MPEC 2019-Q118 -- 2019 QU4
703Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2019-Q109, 2019-Q114, 2019-Q116 & 2019-Q117 -- 2019 QT4, 2019 QL4, 2019 QJ4, 2019 QC4
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 9 in MPEC 2019-Q108 -- 2019 QW, 2019 QV, 2019 QT2, 2019 QT, 2019 QP2, 2019 OU3, 2019 OJ1, 2019 NP3, 2019 ME2
850Cordell-Lorenz Obs. in Tennessee, 4 in MPECs 2019-Q109, 2019-Q116, 2019-Q118 & 2019-Q119 -- 2019 QV4, 2019 QU4, 2019 QL4, 2019 QC4
W84!program code "!" (10) via DECam in Chile, 1 in MPEC 2019-Q121 -- 2019 QX4
L29Drebach-South Obs., 5 in MPECs 2019-Q114, 2019-Q116, 2019-Q118, 2019-Q119 & 2019-Q120 -- 2019 QW4, 2019 QV4, 2019 QU4, 2019 QL4, 2019 QJ4
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 7 in MPECs 2019-Q108, 2019-Q109, 2019-Q110, 2019-Q111, 2019-Q112, 2019-Q117 & 2019-Q119 -- 2019 QV4, 2019 QT4, 2019 QE4, 2019 QD4, 2019 QC4, 2018 AG12, 2005 QQ87
734Farpoint Obs. in Kansas, 1 in MPEC 2019-Q120 -- 2019 QW4
W46Foxfire Village Obs., 1 in MPEC 2019-Q108 -- 2001 RW17
E89Geyserland Obs. in New Zealand, 3 in MPEC 2019-Q108 -- 89355, 153842, 3122
J95Great Shefford Obs. in England, 7 in MPECs 2019-Q108, 2019-Q109, 2019-Q110, 2019-Q118, 2019-Q119 & 2019-Q120 -- 2019 QW4, 2019 QV4, 2019 QU4, 2019 QR3, 2019 QD4, 2019 QC4, 18172
A17Guidestar Obs. in Germany, 1 in MPEC 2019-Q118 -- 2019 QU4
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2019-Q118 -- 2019 QU4
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 2 in MPEC 2019-Q108 -- 2019 PR2, 2019 OU1
Q66JAXA Janess-G in New South Wales, 1 in MPEC 2019-Q118 -- 2019 QU4
585Kiev Comet Station in Ukraine, 1 in MPEC 2019-Q119 -- 2019 QV4
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2019-Q112 & 2019-Q114 -- 2019 QJ4, 2019 QE4
568^R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2019-Q121 -- 2019 QX4
G96Mt. Lemmon Survey (MLS) in Arizona, 23 in MPECs 2019-Q108, 2019-Q110, 2019-Q111, 2019-Q112, 2019-Q113 & 2019-Q115 -- 2019 QK4, 2019 QH4, 2019 QE4, 2019 QD4, 2019 LE5, 2019 HC, 2019 GP2, 2018 AG12, 2015 YL10, 2014 TY33, 2012 PW, 481394, 467475, 450160, 448818, 448628, 441825, 306462, 26663, 23187, 171839, 3553, 1865
G34Oberfrauendorf Obs. in Germany, 2 in MPECs 2019-Q118 & 2019-Q119 -- 2019 QV4, 2019 QU4
F51Pan-STARRS 1 (PS1) in Hawaii, 20 in MPECs 2019-Q108, 2019-Q118, 2019-Q120 & 2019-Q121 -- 2019 QX4, 2019 QW4, 2019 QU4, 2019 OU3, 2017 OW67, 2015 OL35, 2010 VL1, 2001 TY44, 2000 SZ44, 516984, 477491, 42286, 401857, 331471, 280136, 240320, 17181, 164120, 163760, 4660
F52Pan-STARRS 2 (PS2) in Hawaii, 6 in MPEC 2019-Q108 -- 2017 XD62, 2014 HH192, 458745, 455432, 340666, 326742
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2019-Q108 -- 2019 QP3
L18QOS Obs., 4 in MPECs 2019-Q108 & 2019-Q118 -- 2019 QU4, 2016 PD1, 2016 NL15, 2010 VW75
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2019-Q118 -- 2019 QU4
H36Sandlot Obs. in Kansas, 2 in MPECs 2019-Q111 & 2019-Q120 -- 2019 QW4, 2018 AG12
C95SATINO-1 in France, 1 in MPEC 2019-Q108 -- 2012 HR69
587Sormano Obs. in Italy, 2 in MPECs 2019-Q118 & 2019-Q119 -- 2019 QV4, 2019 QU4
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2019-Q108 -- 2019 PD3, 2006 RJ1
291Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2019-Q108 & 2019-Q112 -- 2019 QF, 2019 QE4, 2019 PT1, 2019 OJ
W34Squirrel Valley Obs. in North Carolina, 2 in MPECs 2019-Q116 & 2019-Q119 -- 2019 QV4, 2019 QL4
I93St. Pardon de Conques Obs. in France, 5 in MPECs 2019-Q114, 2019-Q116, 2019-Q118, 2019-Q119 & 2019-Q120 -- 2019 QW4, 2019 QV4, 2019 QU4, 2019 QL4, 2019 QJ4
I52Steward Obs. Mt. Lemmon Station in Arizona, 7 in MPECs 2019-Q109, 2019-Q110, 2019-Q111, 2019-Q112, 2019-Q114, 2019-Q116 & 2019-Q117 -- 2019 QT4, 2019 QL4, 2019 QJ4, 2019 QE4, 2019 QD4, 2019 QC4, 2018 AG12
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPECs 2019-Q108 & 2019-Q112 -- 2019 QE4, 2019 QB1
L01Visnjan Obs., 3 in MPECs 2019-Q114, 2019-Q116 & 2019-Q119 -- 2019 QV4, 2019 QL4, 2019 QJ4
I41Zwicky Transient Facility (ZTF) in southern California, 14 in MPEC 2019-Q108 -- 2019 PA, 2015 YL10, 2015 QT9, 2009 QB36, 526825, 408869, 367525, 355256, 340666, 293054, 163051, 162082, 142563, 887
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 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 QR3JPL Sentry15302078-2088159.9020678e-05-5.13-5.340JPL: Computed at 06:13 today Pacific time based on 17 observations spanning 1.7923 days (2019-Aug-27.27806 to 2019-Aug-29.070318). Diameter approximately 0.013 km. from weighted mean H=27.11.
NEODyS15302074-2089469.52e-05-5.16-5.390NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2019-08-27.279 to 2019-08-29.071."
2019 QB1JPL Sentry15302032-205321.8442e-07-7.51-7.720JPL: Computed at 06:11 today Pacific time based on 30 observations spanning 5.9471 days (2019-Aug-22.52336 to 2019-Aug-28.470456). Diameter approximately 0.011 km. from weighted mean H=27.40.
NEODyS15302032-209553.96e-07-7.17-7.590NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2019-08-22.524 to 2019-08-28.471."
2019 QFJPL Sentry15302069-210232.74187e-07-8.01-8.260JPL: Computed at 06:09 today Pacific time based on 25 observations spanning 7.1154 days (2019-Aug-21.23858 to 2019-Aug-28.35397). Diameter approximately 0.009 km. from weighted mean H=27.89.
NEODyS15302069-210264.96e-07-7.83-8.450NEODyS: "Based on 25 optical observations (of which 1 are rejected as outliers) from 2019-08-21.239 to 2019-08-28.355."

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 29 August '19

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

2310Updated Traffic Report
2132Grabbed MPEC 2019-Q118 - 2019 QU4 - see above
Grabbed MPEC 2019-Q119 - 2019 QV4 - see above
Grabbed MPEC 2019-Q120 - 2019 QW4 - see above
Grabbed MPEC 2019-Q121 - 2019 QX4 - see above
1600Grabbed MPEC 2019-Q117 - 2019 QT4 - see above
1530Noted that JPL Sentry has updated its 2019 QB1 risk assessment - see above
Noted that NEODyS has updated its 2019 QB1 risk assessment - see above
Noted that JPL Sentry has updated its 2019 QF risk assessment - see above
Noted that NEODyS has updated its 2019 QF risk assessment - see above
Noted that JPL Sentry has updated its 2019 QR3 risk assessment - see above
Noted that NEODyS has updated its 2019 QR3 risk assessment - see above
Grabbed MPEC 2019-Q108 - Daily Orbit Update - see above
Grabbed MPEC 2019-Q109 - 2019 QC4 - see above
Grabbed MPEC 2019-Q110 - 2019 QD4 - see above
Grabbed MPEC 2019-Q111 - 2018 AG12 - see above
Grabbed MPEC 2019-Q112 - 2019 QE4 - see above
Grabbed MPEC 2019-Q113 - 2019 QH4 - see above
Grabbed MPEC 2019-Q114 - 2019 QJ4 - see above
Grabbed MPEC 2019-Q115 - 2019 QK4 - see above
Grabbed MPEC 2019-Q116 - 2019 QL4 - see above