2019-09-01 Tracking News

Contents on 1 September '19

Traffic Report -- four objects
IAU Minor Planet Center
- NEOCP Activity -- 75 listings
- New MPECs -- seven MPECs
Observers -- 23 observers
Impact Risk Monitoring -- two objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1049 risk-listed objects, 24 have had news in the last 31 days. Updated at 1600 UTC on 1 Sept.
Ephemerides for risk-listed objects & close passers
News archive (old) & news image catalog (discontinued)
Object Links - mainly for radar targets & close passers (mostly discontinued)
Observing Campaigns (old)

The latest A/CC news is available via framed access, 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 1 September '19

Four objects reported inside ten LD

There are four asteroidal objects known to be traveling within ten lunar distances (LD) of our planet today. None of them are closer than five LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 2.41, 5.0 & 10.0 LD boundaries
Earth passage	I D	~Size	Distance today	Inside ten LD	Notes
4.61 LD Aug. 30	2019 QU4	37 m	5.02 to 6.02 LD	Aug. 26 - Sept. 4	NHATS target - DOU

5.65 LD tomorrow	2019 QA5	20 m	5.65 from 6.52 LD	Aug. 30 - Sept. 4
5.65 LD Aug. 30	2019 QR3	13 m	7.09 to 8.86 LD	Aug. 27 - tomorrow	risk
5.88 LD Aug. 31	2019 QD4	22 m	5.90 to 8.05 LD	Aug. 30 - tomorrow

Approaching Traffic - sorted by 10-LD bubble entry date
2.5 LD Sept. 10*	2019 QY4	9 m	14.3 from 16.0 LD	Sept. 4 - 15	*Earth passage uncertainty +/- 1.33 hours, NHATS target
9.69 LD Sept. 9	2019 QZ3	37 m	15.86 from 17.24 LD	Sept. 7 - 10	NHATS target

This report was generated at 1955 UTC with follow-up in today's DOU MPEC for outbound 2019 QU4 and for departed risk-listed objects 2019 QE and 2019 PO1.

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 1 September '19

The MPC's NEO Confirmation Page has 75 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 75 objects listed. Of these, 35 were "one nighters." So far The Tracking News has counted a total of 92 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 1 September '19

Minor Planet Electronic Circulars

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

MPEC 2019-R01 time-stamped "04:12 UT" - 2019 QO6 - see below
MPEC 2019-R02 time-stamped "12:05 UT" - Daily Orbit Update - see below
MPEC 2019-R03 time-stamped "12:37 UT" - 2019 QQ6 - see below
MPEC 2019-R04 time-stamped "12:40 UT" - 2019 QR6 - see below
MPEC 2019-R05 time-stamped "12:44 UT" - 2019 QS6 - see below
MPEC 2019-R06 time-stamped "12:52 UT" - 2019 QT6 - see below
MPEC 2019-R07 time-stamped "22:02 UT" - 2019 QB7

MPEC 2019-R07 - "22:02 UT" - 2019 QB7

K19Q07B 2019 QB7 (small asteroid, H=24.5 ~43m) was picked up at 0852 UT on 28 Aug. by Pan-STARRS 1 (PS1), observing it at Aug. 28.37-40p4 at w=21.9-22.3. This detection was confirmed by Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Aug. 29.13-14p3 at G=22.1-2 & Sept. 1.11-13p3 at G=21.9-22.2) and R. Wainscoat on Mauna Kea (Aug. 29.31-32p2 at G=22.13-17).

MPEC 2019-R06 - "12:52 UT" - 2019 QT6

K19Q06T 2019 QT6 (small asteroid, Earth MOID=9.0 LD, H=25.1 ~32m) was picked up at 0909 UT on 30 Aug. by the Mt. Lemmon Survey (MLS), observing it at Aug. 30.38-40p4 and Sept. 1.43p4. This detection was confirmed by Steward Obs. Mt. Lemmon Station (Aug. 30.49p3 at G=21.2-22.4).

MPEC 2019-R05 - "12:44 UT" - 2019 QS6

K19Q06S 2019 QS6 (small asteroid, H=26.0 ~21m) was picked up at 0913 UT on 30 Aug. by MLS, observing it at Aug. 30.38-40p4 and Sept. 1.42-43p3. This detection was confirmed by Steward Mt. Lemmon Sta. (Aug. 30.47-48p4).

MPEC 2019-R04 - "12:40 UT" - 2019 QR6

K19Q06R 2019 QR6 (Q=9.230 AU, H=20.0 ~339m) was picked up at 0939 UT on 30 Aug. by MLS, observing it at Aug. 30.40-42p4 and 30.49p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Aug. 30.48-49p4 & Sept. 1.44-45p3), St. Pardon de Conques Obs. (Aug. 31.03-05p3), Visnjan Obs. (Aug. 31.07-08p4), Farpoint Obs. (Aug. 31.28-29p4), and Sandlot Obs. (Aug. 31.28-31p3).

MPEC 2019-R03 - "12:37 UT" - 2019 QQ6

K19Q06Q 2019 QQ6 (small asteroid, Earth MOID=5.8 LD, H=25.3 ~29m) was picked up at 0519 UT on 30 Aug. by MLS, observing it at Aug. 30.22-24p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Aug. 30.39p4), St. Pardon de Conques Obs. (Aug. 30.91-93p2), Visnjan Obs. (Aug. 31.83-84p3), Great Shefford Obs. (Aug. 31.85-87p2), and Sandlot Obs. (Sept. 1.19-21p3).

<< DOU on 1 September '19 >> MPEC 2019-R02 - "12:05 UT" - Daily Orbit Update

Observations of risk-listed objects
K19Q00E 2019 QE (close passer) from the Spacewatch 1.8m telescope (Sept. 1.45-47p3)
K19P01O 2019 PO1 (small asteroid, arc=22 days, H=27.8 ~9m, close passer, NHATS target) from UH/Tholen NEO Follow-Up 2.24m Telescope (Aug. 31.41p3 at G=22.38-51)
Observations of close-passing objects
K19Q04U 2019 QU4 (arc=3 days, H=24.8 ~37m, NHATS target) from Castelmartini Obs. (Aug. 30.87p3), Landehen Obs. (Aug. 30.97-98p4 & 31.03p1), and Great Shefford Obs. (Aug. 31.84p4)
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K19Q05Y 2019 QY5 (arc=2 days, H=25.8 ~23m) from Northolt Branch Obs. (Aug. 30.94-96p3)
K19Q04V 2019 QV4 (arc=2 days, H=24.4 ~45m) from Castelmartini Obs. (Aug. 30.92-93p3)
K19Q04L 2019 QL4 (arc=4 days, H=23.2 ~78m) from PS1 (Aug. 31.26p1 & 31.30-42p8)
K19P02B 2019 PB2 (arc=22 days, H=23.3 ~74m) from Astronomical Research Obs. Westfield (Aug. 10.24-26p3)
K19P01P 2019 PP1 (arc=23 days, H=22.2 ~123m) from Northolt Branch Obs. (Aug. 30.99-00p3)
K19O03B 2019 OB3 (arc=14 days, H=24.1 ~51m) from ARO Westfield (Aug. 11.32-35p3 at V=22.2-3)
K19O00G 2019 OG (arc=29 days, H=22.4 ~112m) from ARO Westfield (Aug. 11.29-31p8)
K06S06E 2006 SE6 (arc=2 opp, H=22.9 ~89m) from ATLAS Haleakala (Aug. 31.48-50p4)
K19Q00G 2019 QG (arc=20 days, H=21.8 ~148m) from ARO Westfield (Aug. 28.12-13p3)
K19P02M 2019 PM2 (arc=56 days, H=21.9 ~141m) from ARO Westfield (Aug. 11.22-25p2)
K10V75W 2010 VW75 (Q=4.360 AU, arc=2 opp, H=21.8 ~148m) from Castelmartini Obs. (Aug. 30.94-95p3) and Oberfrauendorf Obs. (Aug. 31.82-85p5)
Observations of other objects
K19Q00K 2019 QK (i=38.2°, q=0.302 AU, arc=9 days, H=20.9 ~224m) from ARO Westfield (Aug. 28.14-18p3)
K19P03A 2019 PA3 (Q=4.272 AU, arc=22 days, H=21.1 ~204m) from Steward Mt. Lemmon Sta. (Sept. 1.45-47p4)
K19P00A 2019 PA (Q=4.755 AU, arc=29 days, H=19.5 ~426m) from ARO Westfield (Aug. 28.19-21p5) and the Zwicky Transient Facility (ZTF) (Aug. 29.28p1, 31.29p1 & 31.34-37p4)
K19O04Q 2019 OQ4 (arc=35 days, H=20.8 ~234m) from Steward Mt. Lemmon Sta. (Sept. 1.47-48p4)
K19O03Y 2019 OY3 (i=48.7°, arc=30 days, H=19.8 ~371m) from ARO Westfield (Aug. 28.09-11p3)
K19O02P 2019 OP2 (arc=59 days, H=21.0 ~214m) from ARO Westfield (Aug. 28.22-24p3)
K19M03V 2019 MV3 (arc=54 days, H=20.2 ~309m) from SATINO-1 (Aug. 23.08-09p3)
K19G03D 2019 GD3 (arc=148 days, H=20.7 ~245m) from ARO Westfield (Aug. 19.16p5)
K17B92E 2017 BE92 (i=40.8°, arc=2 opp, H=20.0 ~339m) from ARO Westfield (Aug. 11.38-40p3 at V=21.8-22.2)
K16N15L 2016 NL15 (arc=2 opp, H=20.4 ~282m) from Landehen Obs. (Aug. 31.01-03p5) and Northolt Branch Obs. (Aug. 31.92p3)
K15Y10L 2015 YL10 (arc=3 opp, H=19.5 ~426m) from ZTF (Aug. 31.32p2 & 31.43p1)
K15R35Z 2015 RZ35 (Q=4.231 AU, arc=3 opp, H=18.8 ~589m) from ZTF (Aug. 28.37-41p4)
K14Qh3K 2014 QK433 (i=39.2°, Q=4.783 AU, arc=2 opp, H=18.4 ~708m) from Castelmartini Obs. (Aug. 30.85-86p3)
K13C89K 2013 CK89 (arc=4 opp, H=18.1 ~812m) from Landehen Obs. (Aug. 31.00-02p5)
K10K00H 2010 KH (Q=4.285 AU, arc=3 opp, H=19.4 ~446m) from WISE (Aug. 29.05p1, 29.18p1, 29.32p1, 29.38p1, 29.45p1 & 29.51p1)
K06M00A 2006 MA (Q=4.051 AU, arc=3 opp, H=19.0 ~537m) from ZTF (Aug. 31.27-30p2)
q3972 523972 1999 CW8 from ZTF (Aug. 31.17-22p8)
k7475 467475 2006 RG7 from ZTF (Aug. 31.39-41p3)
g9733 429733 2011 LX10 from Castelmartini Obs. (Aug. 30.88-89p3)
e8869 408869 2001 SD348 from ZTF (Aug. 28.22p1 & 29.21p1)
b8610 378610 2008 FT6 from ZTF (Aug. 28.38-40p2 & 31.38-40p2)
a9264 369264 2009 MS from ZTF (Aug. 30.47-51p4)
a7525 367525 2009 QZ6 from ZTF (Aug. 31.25-28p2)
W6777 326777 2003 SV222 from Landehen Obs. (Aug. 30.96-99p5)
O3025 243025 2006 UM216 from ARO Westfield (Aug. 19.37p6) and ZTF (Aug. 31.47p2)
G3760 163760 2003 OR14 from Castelmartini Obs. (Aug. 30.91p3)
A5140 105140 2000 NL10 from Castelmartini Obs. (Aug. 30.84p3)
85490 85490 1997 SE5 from ZTF (Aug. 28.49-51p2 & 31.48-51p2)
18172 18172 2000 QL7 from ARO Westfield (Aug. 19.34-35p6)
12538 12538 1998 OH from Castelmartini Obs. (Aug. 30.85p3)
05786 5786 Talos (1991 RC) from Castelmartini Obs. (Aug. 30.89-90p3)
02100 2100 Ra-Shalom (1978 RA) from ARO Westfield (Aug. 19.32-33p6)
02059 2059 Baboquivari (1963 UA) from Castelmartini Obs. (Aug. 30.90-91p3)
01865 1865 Cerberus (1971 UA) from ARO Westfield (Aug. 19.21-22p5) and Castelmartini Obs. (Aug. 30.89p3)

MPEC 2019-R01 - "04:12 UT" - 2019 QO6

K19Q06O 2019 QO6 (small asteroid, H=22.3 ~117m) was picked up at 0854 UT on 28 Aug. by MLS, observing it at Aug. 28.37-39p4 and 28.45p4. This detection was confirmed by ESA Optical Ground Station (ESA OGS) (Aug. 29.03-04p3), ARO Westfield (Aug. 29.31-32p3), Sandlot Obs. (Aug. 29.34-36p3), Visnjan Obs. (Aug. 30.02p3), and Farra d'Isonzo Obs. (Sept. 1.05-08p3).

Observers on 1 September '19

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

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 16 in MPECs 2019-R01 & 2019-R02 -- 2019 QO6, 2019 QK, 2019 QG, 2019 PM2, 2019 PB2, 2019 PA, 2019 OY3, 2019 OP2, 2019 OG, 2019 OB3, 2019 GD3, 2017 BE92, 243025, 18172, 2100, 1865
`T05`	ATLAS Haleakala in Hawaii, 1 in MPEC 2019-R02 -- 2006 SE6
`160`	Castelmartini Obs. in Italy, 11 in MPEC 2019-R02 -- 2019 QV4, 2019 QU4, 2014 QK433, 2010 VW75, 429733, 163760, 12538, 105140, 5786, 2059, 1865
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2019-R07 -- 2019 QB7
`J04`	ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2019-R01 -- 2019 QO6
`734`	Farpoint Obs. in Kansas, 1 in MPEC 2019-R04 -- 2019 QR6
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2019-R01 -- 2019 QO6
`J95`	Great Shefford Obs. in England, 2 in MPECs 2019-R02 & 2019-R03 -- 2019 QU4, 2019 QQ6
`Z43`	Landehen Obs., 4 in MPEC 2019-R02 -- 2019 QU4, 2016 NL15, 2013 CK89, 326777
`568^`	R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2019-R07 -- 2019 QB7
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2019-R01, 2019-R03, 2019-R04, 2019-R05 & 2019-R06 -- 2019 QT6, 2019 QS6, 2019 QR6, 2019 QQ6, 2019 QO6
`Z80`	Northolt Branch Obs. in England, 3 in MPEC 2019-R02 -- 2019 QY5, 2019 PP1, 2016 NL15
`G34`	Oberfrauendorf Obs. in Germany, 1 in MPEC 2019-R02 -- 2010 VW75
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2019-R02 & 2019-R07 -- 2019 QL4, 2019 QB7
`H36`	Sandlot Obs. in Kansas, 3 in MPECs 2019-R01, 2019-R03 & 2019-R04 -- 2019 QR6, 2019 QQ6, 2019 QO6
`C95`	SATINO-1 in France, 1 in MPEC 2019-R02 -- 2019 MV3
`291`	Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2019-R02 -- 2019 QE
`I93`	St. Pardon de Conques Obs. in France, 2 in MPECs 2019-R03 & 2019-R04 -- 2019 QR6, 2019 QQ6
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 6 in MPECs 2019-R02, 2019-R03, 2019-R04, 2019-R05 & 2019-R06 -- 2019 QT6, 2019 QS6, 2019 QR6, 2019 QQ6, 2019 PA3, 2019 OQ4
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2019-R02 -- 2019 PO1
`L01`	Visnjan Obs., 3 in MPECs 2019-R01, 2019-R03 & 2019-R04 -- 2019 QR6, 2019 QQ6, 2019 QO6
`C51`	WISE in Earth polar orbit, 1 in MPEC 2019-R02 -- 2010 KH
`I41`	Zwicky Transient Facility (ZTF) in southern California, 12 in MPEC 2019-R02 -- 2019 PA, 2015 YL10, 2015 RZ35, 2006 MA, 85490, 523972, 467475, 408869, 378610, 369264, 367525, 243025

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 1 September '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 QE	JPL Sentry	1600	2113-2113	1	7.590e-07	-7.48	-7.48	0	JPL: Computed at 06:31 today Pacific time based on 70 observations spanning 12.175 days (2019-Aug-20.29309 to 2019-Sep-01.46815). Diameter approximately 0.013 km. from weighted mean H=27.04.

2019 PO1	JPL Sentry	1600	2071-2109	20	4.741768e-05	-6.16	-6.72	0	JPL: Computed at 06:41 today Pacific time based on 42 observations spanning 21.882 days (2019-Aug-09.53131 to 2019-Aug-31.412976). Diameter approximately 0.008 km. from weighted mean H=28.05.
2019 PO1	NEODyS	1600	2077-2117	68	5.45e-05	-6.18	-6.81	0	NEODyS: "Based on 44 optical observations (of which 2 are rejected as outliers) from 2019-08-09.532 to 2019-08-31.414."

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 1 September '19

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

2236	Grabbed MPEC 2019-R07 - 2019 QB7 - see above
1955	Generated Traffic Report
1600	Noted that JPL Sentry has updated its 2019 PO1 risk assessment - see above Noted that NEODyS has updated its 2019 PO1 risk assessment - see above Noted that JPL Sentry has updated its 2019 QE risk assessment - see above Grabbed MPEC 2019-R02 - Daily Orbit Update - see above Grabbed MPEC 2019-R03 - 2019 QQ6 - see above Grabbed MPEC 2019-R04 - 2019 QR6 - see above Grabbed MPEC 2019-R05 - 2019 QS6 - see above Grabbed MPEC 2019-R06 - 2019 QT6 - see above
0540	Grabbed MPEC 2019-R01 - 2019 QO6 - see above

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