2020-01-11 Tracking News

Contents on 11 January '20

Traffic Report -- thirteen objects
Radar Astrometry -- one object
IAU Minor Planet Center
- NEOCP Activity -- 15 listings
- New MPECs -- three MPECs
Observers -- 21 observers
Impact Risk Monitoring -- two objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1076 risk-listed objects, 64 have had news in the last 31 days. Updated at 1721 UTC on 11 Jan.
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 11 January '20

Thirteen objects reported inside ten LD

Thirteen Solar-System small bodies are reported inside ten lunar distances (LD) of our home world today. Closest are 2020 AT1, outbound from 3.23 to 4.27 LD, and 2019 YF4, moving away from 3.73 to 3.86 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
2.47 LD Jan. 9	2020 AT1	11 m	3.23 to 4.27 LD	Jan. 2 - 16	NHATS target
3.27 LD Jan. 4	2019 YB4	15 m	9.51 to 10.82 LD	Dec. 28 - today	NHATS target, exits ten LD
3.71 LD yesterday	2019 YF4	14 m	3.73 to 3.86 LD	Dec. 27 - Jan. 25	NHATS target - DOU
3.8 LD tomorrow*	2020 AB2	14 m	4.2 from 5.2 LD	Jan. 7 - 18	EPU +/- 10 mins.*, NHATS target
4.13 LD Jan. 6	2020 AU1	17 m	8.12 to 9.35 LD	Dec. 30 - tomorrow
4.76 LD Jan. 6	2020 AW	6 m	6.69 to 7.38 LD	Dec. 27 - Jan. 15	NHATS target, risk

6.20 LD yesterday	2020 AL2	26 m	7.46 to 11.53 LD	Jan. 8 - 11	exits ten LD
6.33 LD today	2019 WC5	105 m	6.33 LD	Jan. 8 - 13	Earth closest at 0613 UTC - DOU
6.5 LD Jan. 13*	2020 AE1	11 m	6.7 from 7.0 LD	Jan. 5 - 21	EPU +/- 1.28 hours*, NHATS target
6.86 LD Jan. 16	2019 YD3	21 m	8.26 from 8.92 LD	Jan. 9 - 22	NHATS target
6.91 LD Jan. 8	2020 AR1	12 m	9.13 to 10.66 LD	Jan. 4 - 11	exits ten LD, risk
8.2 LD Jan. 16*	2020 AZ1	16 m	9.0 from 9.4 LD	Jan. 9 - 22	EPU +/- 5 mins.*, NHATS target
8.51 LD tomorrow	2020 AO1	62 m	9.09 from 11.13 LD	today - Jan. 14	enters ten LD, risk
* EPU = Earth passage uncertainty

This report was generated at 1954 UTC with follow-up in today's DOU MPEC for passing 2019 WC5, outbound radar target 2019 YF4, and departed 2020 AV1, plus, from August-September, astrometry for 2019 SE5, 2019 QD1, and radar targets 2019 SW5 and 2019 SU3. We also note radar observation from late December of risk-listed 2019 YX1.

Approaching - sorted by 10-LD bubble entry date
Earth passage	I D	~Size	Distance today	Inside ten LD	Notes
9.93 LD Jan. 13	2020 AX2	28 m	10.16 from 10.58 LD	tomorrow - Jan. 14	NHATS target
9.08 LD Jan. 17	2020 AD1	18 m	10.87 from 11.47 LD	Jan. 13 - 22	NHATS target
9.31 LD Jan. 14	2020 AO	46 m	15.24 from 18.90 LD	Jan. 13 - 15

Our new "Earth's Busy Neighborhood" presents improved and interactive traffic tables.

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.

Radar Astrometry on 11 January '20

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:

Data update noted at 1720 UTC when the database was dated 10 Jan.

2019 YX1 (close passer) from Arecibo (Dec. 26.49 velocity, 26.50 velocity, 26.50 range, 26.51 range & 26.53 range)

Photometry and some astrometry is needed for upcoming radar targets. See Arecibo and Goldstone schedules.

NEOCP Activity on 11 January '20

The MPC's NEO Confirmation Page has 15 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had fifteen objects listed. Of these, eight were "one nighters." So far The Tracking News has counted a total of seventeen 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 January '20

Minor Planet Electronic Circulars

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

MPEC 2020-A114 time-stamped "12:00 UT" - Daily Orbit Update - see below
MPEC 2020-A115 time-stamped "18:02 UT" - 2020 AD3 - see below
MPEC 2020-A116 time-stamped "18:13 UT" - 2020 AE3

MPEC 2020-A116 - "18:13 UT" - 2020 AE3

K20A03E 2020 AE3 (small asteroid, Earth MOID=1.8 LD, H=23.4 ~71m) was picked up at 1224 UT on 6 Jan. by the Mt. Lemmon Survey (MLS), observing it at Jan. 6.52-56p7 at G=20.9-22.1. This detection was confirmed by Visnjan Obs. (Jan. 7.09-12p5 & 11.12-14p3) and Magdalena Ridge Obs. (MRO) (Jan. 7.40-43p4).

MPEC 2020-A115 - "18:02 UT" - 2020 AD3

K20A03D 2020 AD3 (Earth MOID=6.1 LD, H=21.7 ~155m) was picked up at 0946 UT on 7 Jan. by the Catalina Sky Survey (CSS), observing it at Jan. 7.41-42p4. This detection was confirmed by MRO (Jan. 7.44-47p4), the Spacewatch 0.9m telescope (Jan. 7.53-56p3), Steward Obs. Mt. Lemmon Station (Jan. 7.53p4), Schiaparelli Obs. (Jan. 8.10-11p3 & 11.07-11p4), SATINO-1 (Jan. 8.14-15p2), LCO McDonald Obs. (Jan. 8.40p3), GiaGa Obs. (Jan. 10.99-02p3), Farra d'Isonzo Obs. (Jan. 11.01-02p3), and Visnjan Obs. (Jan. 11.11p4).

<< DOU on 11 January '20 >> MPEC 2020-A114 - "12:00 UT" - Daily Orbit Update

Observations of risk-listed objects
K11E04S 2011 ES4 (small asteroid, arc=4 days, H=25.4 ~28m, NHATS target) from Great Shefford Obs. (2011 March 4.89p2)
Observations of close-passing objects
K20A01V 2020 AV1 from Clixby Obs. (Jan. 6.89-90p2)
K19Y04F 2019 YF4 (arc=13 days, H=27.0 ~13m, NHATS target) from GiaGa Obs. (Jan. 10.94-96p3)
K19W05C 2019 WC5 (arc=44 days, H=22.5 ~107m) from Astronomical Research Obs. Westfield (Jan. 9.28p4)
K19S05W 2019 SW5 (arc=4 days, H=25.1 ~32m) from ARO Westfield (2019 Sept. 28.17p5)
K19S05E 2019 SE5 (arc=3 days, H=26.7 ~15m) from ARO Westfield (2019 Sept. 28.18p6)
K19S03U 2019 SU3 (NHATS target) from Foxfire Village Obs. (2019 Sept. 26.09p2)
K19Q01D 2019 QD1 from ARO Westfield (2019 Aug. 23.25-26p3)
Observation campaigns (NHATS targets, radar support)
K20A00E 2020 AE (arc=12 days, H=25.7 ~25m, NHATS) from Great Shefford Obs. (Jan. 10.76-78p2)
-- NHATS target table
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K19V03Y 2019 VY3 (arc=47 days, H=22.8 ~93m) from UH/Tholen NEO Follow-Up 2.24m Telescope (Dec. 4.20p1 at G=22.02)
K19Q01A 2019 QA1 (arc=14 days, H=25.2 ~31m) from ARO Westfield (2019 Aug. 23.15-16p4)
K19P01F 2019 PF1 (arc=4 days, H=24.3 ~47m) from ARO Westfield (2019 Aug. 7.32-33p3)
K19L00N 2019 LN (arc=13 days, H=22.7 ~98m) from ARO Westfield (2019 June 2.26-27p3)
K19V01X 2019 VX1 (arc=22 days, H=22.0 ~135m) from ARO Westfield (Nov. 3.06-07p3 at V=22.2-6)
Observations of other objects
K19X02W 2019 XW2 (arc=33 days, H=19.7 ~389m) from ARO Westfield (Jan. 9.17p3)
K19V04U 2019 VU4 (arc=52 days, H=19.9 ~355m) from ARO Westfield (Nov. 8.30-32p3 at V=21.8-22.2)
K19P03Q 2019 PQ3 (arc=136 days, H=19.4 ~446m) from ARO Westfield (Nov. 8.27-28p3)
K19P00R 2019 PR (q=0.268 AU, Q=5.134 AU, arc=4 days, H=19.6 ~407m) from ARO Westfield (2019 Aug. 5.39-40p4)
K19A03Q 2019 AQ3 from Berthelot Obs. (2019 Jan. 7.68-70p3)
K16X23O 2016 XO23 (arc=5 opp, H=20.7 ~245m) from GiaGa Obs. (Jan. 10.88-90p3)
K16U80T 2016 UT80 (arc=3 opp, H=19.0 ~537m) from Castelmartini Obs. (Jan. 8.87p3)
K14N64F 2014 NF64 (Q=4.904 AU, arc=5 opp, H=18.2 ~776m) from ARO Westfield (Jan. 9.12-13p4)
K13P02V 2013 PV2 (arc=3 opp, H=20.0 ~339m) from Castelmartini Obs. (Jan. 8.83-84p3)
K11V05R 2011 VR5 (arc=3 opp, H=18.0 ~851m) from WISE (Jan. 8.20p1, 8.46p1, 8.59p1, 8.65p1, 8.72p1, 8.85p1, 8.91p1, 9.18p1 & 9.31p1)
K11M05E 2011 ME5 (i=37.3°, arc=4 opp, H=19.5 ~426m) from SATINO-1 (Jan. 3.90-92p2)
K07VJ1C 2007 VC191 (arc=2 opp, H=21.0 ~214m) from ARO Westfield (2019 Oct. 28.27p2 at V=22.4)
j8745 458745 2011 QY37 from Castelmartini Obs. (Jan. 8.93p3)
h7316 437316 2013 OS3 from ARO Westfield (Jan. 9.20-21p7)
f6591 416591 2004 LC2 from Castelmartini Obs. (Jan. 9.19-20p3)
X3555 333555 2005 VY17 from ARO Westfield (Jan. 9.14p5)
R6397 276397 2002 XA40 from Castelmartini Obs. (Jan. 8.95p3)
K3015 203015 1999 YF3 from Castelmartini Obs. (Jan. 9.07p3)
G3696 163696 2003 EB50 from ARO Westfield (Jan. 9.16p6)
G3373 163373 2002 PZ39 from Castelmartini Obs. (Jan. 9.02-03p2)
E1052 141052 2001 XR1 from Castelmartini Obs. (Jan. 8.88p3)
D7924 137924 2000 BD19 from Castelmartini Obs. (Jan. 9.17p1)
D7199 137199 1999 KX4 from Castelmartini Obs. (Jan. 8.93-94p3)
D7120 137120 1999 BJ8 from Castelmartini Obs. (Jan. 9.12p3)
A6538 106538 2000 WK63 from ARO Westfield (Jan. 9.11-12p5)
A3067 103067 1999 XA143 from Castelmartini Obs. (Jan. 8.99p3) and ARO Westfield (Jan. 9.23p5)
90075 90075 2002 VU94 from Castelmartini Obs. (Jan. 9.03-04p3)
86326 86326 1999 WK13 from Castelmartini Obs. (Jan. 8.82p3) and ARO Westfield (Jan. 9.06p4)
85628 85628 1998 KV2 from Castelmartini Obs. (Jan. 9.20p3)
85236 85236 1993 KH from Ondrejov Obs. (Dec. 4.75p1, 4.79p1, 4.83p1, 4.88-92p2, 4.96-99p2, 29.92p1, 29.97p1, 30.03p1, 30.99p1, 31.04p1, 31.08p1, 31.13p1, 31.18p1, Jan. 1.72p1, 1.76p1, 1.80-88p3, 1.97-04p3, 2.09-13p2 & 2.23p1)
52768 52768 1998 OR2 from Castelmartini Obs. (Jan. 9.01-02p3)
36284 36284 2000 DM8 from Castelmartini Obs. (Jan. 9.10p3)
34613 34613 2000 UR13 from Castelmartini Obs. (Jan. 9.00-01p3)
30825 30825 1990 TG1 from Castelmartini Obs. (Jan. 8.94p3)
10115 10115 1992 SK from Castelmartini Obs. (Jan. 9.18p3)
05626 5626 1991 FE from Castelmartini Obs. (Jan. 9.05-06p3) and ARO Westfield (Jan. 9.26-27p3)
01627 1627 Ivar (1929 SH) from Castelmartini Obs. (Jan. 9.06-07p3)

Observers on 11 January '20

A total of 21 observers appear in today's MPECs.

Code	Observer / observatory
`251`	Arecibo in Puerto Rico, 1 in radar -- 2019 YX1
`H21`	Astronomical Research Obs. Westfield in Illinois, 21 in MPEC 2020-A114 -- 2019 XW2, 2019 WC5, 2019 VX1, 2019 VU4, 2019 SW5, 2019 SE5, 2019 QD1, 2019 QA1, 2019 PR, 2019 PQ3, 2019 PF1, 2019 LN, 2014 NF64, 2007 VC191, 86326, 437316, 333555, 163696, 106538, 103067, 5626
`L54`	Berthelot Obs., 1 in MPEC 2020-A114 -- 2019 AQ3
`160`	Castelmartini Obs. in Italy, 22 in MPEC 2020-A114 -- 2016 UT80, 2013 PV2, 90075, 86326, 85628, 52768, 458745, 416591, 36284, 34613, 30825, 276397, 203015, 163373, 141052, 137924, 137199, 137120, 103067, 10115, 5626, 1627
`703`	Catalina Sky Survey in Arizona, 1 in MPEC 2020-A115 -- 2020 AD3
`Z99`	Clixby Obs. in England, 1 in MPEC 2020-A114 -- 2020 AV1
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2020-A115 -- 2020 AD3
`W46`	Foxfire Village Obs., 1 in MPEC 2020-A114 -- 2019 SU3
`203`	GiaGa Obs. in Italy, 3 in MPECs 2020-A114 & 2020-A115 -- 2020 AD3, 2019 YF4, 2016 XO23
`J95`	Great Shefford Obs. in England, 2 in MPEC 2020-A114 -- 2020 AE, 2011 ES4
`V37`	LCO McDonald Obs. in Texas, 1 in MPEC 2020-A115 -- 2020 AD3
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2020-A115 & 2020-A116 -- 2020 AE3, 2020 AD3
`G96`	Mt. Lemmon Survey in Arizona, 1 in MPEC 2020-A116 -- 2020 AE3
`557`	Ondrejov Obs. in the Czech Republic, 1 in MPEC 2020-A114 -- 85236
`C95`	SATINO-1 in France, 2 in MPECs 2020-A114 & 2020-A115 -- 2020 AD3, 2011 ME5
`204`	Schiaparelli Obs. in Italy, 1 in MPEC 2020-A115 -- 2020 AD3
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2020-A115 -- 2020 AD3
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 1 in MPEC 2020-A115 -- 2020 AD3
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-A114 -- 2019 VY3
`L01`	Visnjan Obs., 2 in MPECs 2020-A115 & 2020-A116 -- 2020 AE3, 2020 AD3
`C51`	WISE in Earth polar orbit, 1 in MPEC 2020-A114 -- 2011 VR5

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

Impact Risk Monitoring on 11 January '20

**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 YX1	JPL Sentry	1720	R E M O V E D						JPL: Risk listing removed at 0730 UTC today

2011 ES4	JPL Sentry	1720	2031-2112	75	5.38789188e-05	-4.66	-5.12	0	JPL: Computed at 05:58 today Pacific time based on 44 observations spanning 4.0327 days (2011-Mar-02.19847 to 2011-Mar-06.23118). Diameter approximately 0.025 km. from weighted mean H=25.68.

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 January '20

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

1954	Generated Traffic Report
1900	Grabbed MPEC 2020-A115 - 2020 AD3 - see above Grabbed MPEC 2020-A116 - 2020 AE3 - see above
1720	Noted that JPL Sentry has updated its 2011 ES4 risk assessment - see above Noted that JPL Sentry has removed 2019 YX1 as an impact risk - see above Grabbed MPEC 2020-A114 - Daily Orbit Update - see above Noted Radar Astrometry database update - see above

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