2020-01-17 Tracking News

Contents on 17 January '20

Traffic Report -- nine objects
IAU Minor Planet Center
- NEOCP Activity -- eleven listings
- New MPECs -- one MPEC
Observers -- 30 observers
Impact Risk Monitoring -- six objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1075 risk-listed objects, 66 have had news in the last 31 days. Updated at 1641 UTC on 17 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 17 January '20

Nine objects reported inside ten LD

There are nine transient natural objects reported as being less than ten lunar distances (LD) from our planet today. The nearest, 2019 YF4, moves out from 5.62 to 6.10 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
3.71 LD Jan. 10	2019 YF4	14 m	5.62 to 6.10 LD	Dec. 27 - Jan. 25	NHATS target
3.82 LD Jan. 12	2020 AB2	14 m	8.18 to 9.79 LD	Jan. 7 - 18	NHATS target

6.04 LD today	2020 AL3	20 m	6.04 LD	Jan. 14 - 19	Earth closest at 0135 UTC - DOU
6.5 LD Jan. 13*	2020 AE1	11 m	7.3 to 7.7 LD	Jan. 5 - 21	EPU +/- 1.28 hours*, NHATS target
6.85 LD yesterday	2019 YD3	21 m	6.91 to 7.13 LD	Jan. 9 - 22	NHATS target - DOU
7.44 LD Jan. 19	2020 AM3	34 m	8.95 from 11.61 LD	today - Jan. 20	enters ten LD - DOU
7.92 LD today	2020 AN3	293 m	7.92 LD	Jan. 15 - 18	Earth closest at 0134 UTC, risk - DOU
8.24 LD yesterday	2020 AZ1	16 m	8.28 to 8.42 LD	Jan. 9 - 22	NHATS target
9.08 LD today	2020 AD1	19 m	9.08 LD	Jan. 13 - 22	NHATS target, Earth closest at 2114 UTC

Approaching
Earth passage	I D	~Size	Distance today	Inside ten LD	Notes
8.3 LD Jan. 25*	2020 AK3	22 m	14.1 from 15.4 LD	Jan. 21 - 28	EPU +/- 30 mins.*, NHATS target
* EPU = Earth passage uncertainty

This report was generated at 2015 UTC with follow-up in today's DOU MPEC for inbound 2020 AM3, passing objects 2020 AL3 and risk-listed 2020 AN3, outbound 2019 YD3, and four departed risk-listed objects: 2020 AY1, 2019 YP3, 2019 YW2, and intruder 2019 WG2, plus observations from October of intruders 2019 UG11 and risk-listed 2019 UN8 (first follow-up, 3.24 days added to 1.01-day discovery arc).

See our new "Earth's Busy Neighborhood" page for more traffic info.

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 17 January '20

The MPC's NEO Confirmation Page has 11 listings

When last checked at 2331 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eleven objects listed. Of these, eight were "one nighters." So far The Tracking News has counted a total of thirteen 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 17 January '20

Minor Planet Electronic Circulars

As of last check at 2331 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 17 January '20 >> MPEC 2020-B04 - "12:03 UT" - Daily Orbit Update

Observations of risk-listed objects
K20A03N 2020 AN3 (arc=69 days, H=20.4 ~282m, close passer) from Northolt Branch Obs. (Jan. 15.81-82p3), Rokycany Obs. (Jan. 16.70p7), Sormano Obs. (Jan. 16.84p4), and ESA Optical Ground Station (ESA OGS) (Jan. 16.87p3)
K20A01Y 2020 AY1 (small asteroid, arc=12 days, H=25.1 ~32m, close passer, NHATS target) from ESA OGS (Jan. 16.96p6)
K19Y03P 2019 YP3 (small asteroid, arc=21 days, H=25.7 ~25m, close passer) from the Spacewatch 1.8m telescope (Jan. 17.30-33p2 at R=22.5-23.8)
K19Y02W 2019 YW2 (small asteroid, arc=24 days, H=24.1 ~51m, close passer) from ESA OGS (Jan. 16.99-00p3) and the Spacewatch 0.9m telescope (Jan. 17.28-30p3)
K19W02G 2019 WG2 (small asteroid, arc=53 days, H=24.8 ~37m, close passer) from Marco Micheli via Cerro Paranal (Jan. 16.09-10p3 at G=24.2-8)
K19U08N 2019 UN8 (small asteroid, Q=4.444 AU, arc=4 days, H=29.7 ~4m, close passer) from UH/Tholen NEO Follow-Up 2.24m Telescope (2019 Oct. 29.50p1 at G=24.16)
Observations of close-passing objects
K20A03M 2020 AM3 (arc=15 days, H=25.0 ~34m) from GiaGa Obs. (Jan. 16.98-00p2)
K20A03L 2020 AL3 (arc=2 days, H=26.2 ~19m) from Farra d'Isonzo Obs. (Jan. 14.84-85p3)
K19Y03D 2019 YD3 (arc=24 days, H=26.0 ~21m, NHATS target) from Astronomical Research Obs. Westfield (Jan. 14.24p5) and KLENOT (Jan. 16.94p8)
K19U11G 2019 UG11 (arc=11 days, H=26.8 ~15m, NHATS target) from N.V. Maigurova via Nikolaev Obs. (2019 Oct. 31.90-94p9)
Observation campaigns (NHATS targets, radar support)
K20A03O 2020 AO3 (arc=2 days, H=24.6 ~41m, NHATS) from Rokycany Obs. (Jan. 16.80-81p3)
K19Y01D 2019 YD1 (arc=28 days, H=25.1 ~32m, NHATS) from Spacewatch 0.9m (Jan. 17.25-26p3)
K19P00Y 2019 PY (arc=175 days, H=25.3 ~29m, NHATS) from ESA OGS (Jan. 16.95-96p2)
K17A05E 2017 AE5 (arc=5 opp, H=22.3 ~117m, NHATS) from Tony Evans via Slooh.com Canary Islands Obs. (Jan. 16.04-07p2), Sormano Obs. (Jan. 16.80-81p3), M57 Obs. (Jan. 16.94-98p4), and Mirasteilas Obs. (Jan. 16.96-97p4)
K11UT2C 2011 UC292 (arc=2 opp, H=22.8 ~93m, NHATS) from Spacewatch 0.9m (Jan. 17.33-35p2)
-- NHATS target table
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K20A03Q 2020 AQ3 (arc=2 days, H=23.6 ~65m) from Mountainville Obs. (Jan. 16.35p1, 16.40p1 & 16.46p1)
K20A01Q 2020 AQ1 (arc=14 days, H=22.2 ~123m) from Rokycany Obs. (Jan. 16.83p4), GiaGa Obs. (Jan. 16.94-95p3), KLENOT (Jan. 16.94p9), and M57 Obs. (Jan. 17.01-03p6)
K19W05E 2019 WE5 (arc=50 days, H=23.0 ~85m) from Spacewatch 0.9m (Jan. 17.35-37p3)
K19O00W 2019 OW (arc=176 days, H=23.3 ~74m) from ESA OGS (Jan. 16.91-93p3)
K04B58T 2004 BT58 (arc=3 opp, H=22.1 ~129m) from ARO Westfield (Jan. 14.27p4) and Guidestar Obs. (Jan. 16.88-90p3)
K19O03A 2019 OA3 (arc=175 days, H=21.8 ~148m) from ESA OGS (Jan. 17.02p3)
K15B92C 2015 BC92 (arc=2 opp, H=21.8 ~148m) from Guidestar Obs. (Jan. 16.79-81p3)
Observations of other objects
K20A03D 2020 AD3 (arc=10 days, H=21.6 ~162m) from Rokycany Obs. (Jan. 16.82p4), KLENOT (Jan. 16.93p9), and M57 Obs. (Jan. 17.05-07p6)
K20A02V 2020 AV2 from NEOSSat (Jan. 15.98p2) and ESA OGS (Jan. 16.82p3)
K19Y04K 2019 YK4 (arc=18 days, H=20.4 ~282m) from ARO Westfield (Jan. 14.23p5)
K19X02W 2019 XW2 (arc=40 days, H=19.7 ~389m) from ARO Westfield (Jan. 14.18p4), M57 Obs. (Jan. 16.85p1 & 16.90-92p3), and program code "-" (22) via Slooh.com Canary Islands Obs. (Jan. 16.91-93p3)
K19X01G 2019 XG1 (Q=4.163 AU, arc=2 opp, H=19.0 ~537m) from Mirasteilas Obs. (Jan. 16.94-95p3)
K19W06R 2019 WR6 (arc=49 days, H=21.5 ~170m) from Spacewatch 0.9m (Jan. 17.21-22p3)
K19V06F 2019 VF6 (arc=84 days, H=21.1 ~204m) from Spacewatch 0.9m (Jan. 17.13-14p3)
K19U13X 2019 UX13 (arc=80 days, H=21.4 ~178m) from Spacewatch 1.8m (Jan. 17.24-27p3 at R=22.5)
K19U11B 2019 UB11 (Q=4.595 AU, arc=163 days, H=20.6 ~257m) from ARO Westfield (Jan. 14.15p3) and Spacewatch 0.9m (Jan. 17.23-24p2)
K19O00O 2019 OO (arc=2 opp, H=21.3 ~186m) from Spacewatch 1.8m (Jan. 17.41-42p3)
K19N02Y 2019 NY2 (arc=253 days, H=21.2 ~195m) from Spacewatch 1.8m (Jan. 17.17-21p3 at R=22.9-23.3)
K19J01H 2019 JH1 (arc=3 opp, H=19.4 ~446m) from ESA OGS (Jan. 16.87-88p3)
K19G03T 2019 GT3 from Maigurova/Nikolaev Obs. (2019 Sept. 9.78-80p5)
K19B01O 2019 BO1 (arc=2 opp, H=19.6 ~407m) from Guidestar Obs. (Jan. 16.84-87p3)
K16X23O 2016 XO23 (arc=5 opp, H=20.8 ~234m) from ARO Westfield (Jan. 14.16p4)
K16W01E 2016 WE1 (arc=3 opp, H=19.5 ~426m) from ARO Westfield (Jan. 14.20-21p3)
K16U80T 2016 UT80 (arc=3 opp, H=19.0 ~537m) from Oukaimeden Obs. (Jan. 16.86-88p4)
K16L09E 2016 LE9 (arc=6 opp, H=17.8 ~933m) from WISE (Jan. 14.31p1, 14.51p1, 14.64p1, 14.71p1, 14.77p1 & 15.03p2)
K16EF7Z 2016 EZ157 (Q=4.289 AU, arc=2 opp, H=18.6 ~645m) from Spacewatch 1.8m (Jan. 17.36-39p2 at R=22.2-5)
K15J01D 2015 JD1 (arc=2 opp, H=20.6 ~257m) from Maigurova/Nikolaev Obs. (2019 Oct. 31.69-70p4)
K15D53Y 2015 DY53 (arc=2 opp, H=21.4 ~178m) from SATINO-1 (Jan. 9.13-15p2)
K14Y34W 2014 YW34 (arc=3 opp, H=21.7 ~155m) from Guidestar Obs. (Jan. 16.91-94p3)
K14N64F 2014 NF64 (Q=4.904 AU, arc=5 opp, H=18.2 ~776m) from ARO Westfield (Jan. 14.18p4) and Mirasteilas Obs. (Jan. 16.88-89p3)
K13A52W 2013 AW52 (arc=5 opp, H=20.0 ~339m) from ARO Westfield (Jan. 14.19p3)
K12TD9O 2012 TO139 (q=0.272 AU, Q=4.605 AU, arc=5 opp, H=19.7 ~389m) from Sormano Obs. (Jan. 16.78p3) and GiaGa Obs. (Jan. 16.88-91p3)
K12BC4D 2012 BD124 (arc=4 opp, H=19.2 ~490m) from ARO Westfield (Jan. 14.21-22p4)
K11C04T 2011 CT4 (arc=3 opp, H=20.7 ~245m) from GiaGa Obs. (Jan. 17.03-06p3)
K08X00P 2008 XP (arc=2 opp, H=21.1 ~204m) from Tholen 2.24m (Nov. 27.60p2 at G=22.09-31)
K06WC9F 2006 WF129 (Q=4.051 AU, arc=3 opp, H=19.0 ~537m) from Spacewatch 0.9m (Jan. 17.31p2)
K04G02B 2004 GB2 (arc=45 days, H=21.0 ~214m) from NEAT's USAF Haleakala telescope (2004 April 8.47-49p3)
j8745 458745 2011 QY37 from Castelmartini Obs. (Jan. 6.94p3)
h7316 437316 2013 OS3 from Olmen Obs. (Jan. 6.82-83p3, 10.74-81p8, 15.82-91p11 & 16.00-02p3), ARO Westfield (Jan. 14.33-34p4), and Wickede Obs. (Jan. 16.78-80p15)
f6591 416591 2004 LC2 from Castelmartini Obs. (Jan. 7.14-15p3)
e9342 409342 2004 XM35 from Castelmartini Obs. (Jan. 6.93-94p3)
W9340 329340 2001 LM5 from ARO Westfield (Jan. 14.23-24p4)
R6397 276397 2002 XA40 from Castelmartini Obs. (Jan. 6.96-97p3)
O8926 248926 2006 WZ2 from Cancelada Obs. (Jan. 16.81-85p6)
L4088 214088 2004 JN13 from Castelmartini Obs. (Jan. 6.97-98p3)
K3015 203015 1999 YF3 from Castelmartini Obs. (Jan. 7.07p3)
G3373 163373 2002 PZ39 from Castelmartini Obs. (Jan. 7.04p3)
G2825 162825 2001 BO61 from ARO Westfield (Jan. 14.29-30p3)
G2004 162004 1991 VE from QOS Obs. (Jan. 14.89p1)
D8013 138013 2000 CN101 from ARO Westfield (Jan. 14.27-28p4)
D7925 137925 2000 BJ19 from Tentlingen Obs. (Jan. 15.88-90p4)
D7924 137924 2000 BD19 from Castelmartini Obs. (Jan. 7.13p3)
D7199 137199 1999 KX4 from Castelmartini Obs. (Jan. 6.95p3)
D7120 137120 1999 BJ8 from Castelmartini Obs. (Jan. 7.11p3)
A6589 106589 2000 WN107 from MASTER Tavrida (Jan. 15.77p1)
A3067 103067 1999 XA143 from Castelmartini Obs. (Jan. 7.01p3) and ARO Westfield (Jan. 14.29-30p6)
99248 99248 2001 KY66 from Maigurova/Nikolaev Obs. (Nov. 1.09-11p10)
96744 96744 1999 OW3 from WISE (Jan. 13.99p1, 14.13p1, 14.26p1, 14.39p1 & 14.52p1)
90075 90075 2002 VU94 from Castelmartini Obs. (Jan. 7.05p3)
85628 85628 1998 KV2 from Castelmartini Obs. (Jan. 7.15-16p3)
52768 52768 1998 OR2 from Castelmartini Obs. (Jan. 7.03p3), ARO Westfield (Jan. 14.33p4), and Olmen Obs. (Jan. 15.85-86p3 & 16.91-94p4)
36236 36236 1999 VV from Tentlingen Obs. (Jan. 15.80-86p4)
34613 34613 2000 UR13 from Castelmartini Obs. (Jan. 7.02p3)
30825 30825 1990 TG1 from Castelmartini Obs. (Jan. 6.95-96p3)
11405 11405 1999 CV3 from ARO Westfield (Jan. 14.21-22p4) and Tentlingen Obs. (Jan. 15.93-96p3)
10115 10115 1992 SK from Castelmartini Obs. (Jan. 7.14p3)
05626 5626 1991 FE from ARO Westfield (Jan. 14.31-32p5)
02100 2100 Ra-Shalom (1978 RA) from Maigurova/Nikolaev Obs. (2019 Aug. 24.03-05p7)
02059 2059 Baboquivari (1963 UA) from Maigurova/Nikolaev Obs. (2019 Sept. 9.81-82p8)
01620 1620 Geographos (1951 RA) from Maigurova/Nikolaev Obs. (2019 Sept. 9.76-78p9 & 2019 Oct. 31.70-72p8)

Observers on 17 January '20

A total of 30 observers appear in today's MPEC.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 18 in MPEC 2020-B04 -- 2019 YK4, 2019 YD3, 2019 XW2, 2019 UB11, 2016 XO23, 2016 WE1, 2014 NF64, 2013 AW52, 2012 BD124, 2004 BT58, 52768, 437316, 329340, 162825, 138013, 11405, 103067, 5626
`Z36`	Cancelada Obs., 1 in MPEC 2020-B04 -- 248926
`160`	Castelmartini Obs. in Italy, 17 in MPEC 2020-B04 -- 90075, 85628, 52768, 458745, 416591, 409342, 34613, 30825, 276397, 214088, 203015, 163373, 137924, 137199, 137120, 103067, 10115
`309&`	Marco Micheli via Cerro Paranal in Chile, 1 in MPEC 2020-B04 -- 2019 WG2
`J04`	ESA Optical Ground Station (ESA OGS) in the Canary Islands, 8 in MPEC 2020-B04 -- 2020 AY1, 2020 AV2, 2020 AN3, 2019 YW2, 2019 PY, 2019 OW, 2019 OA3, 2019 JH1
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2020-B04 -- 2020 AL3
`203`	GiaGa Obs. in Italy, 4 in MPEC 2020-B04 -- 2020 AQ1, 2020 AM3, 2012 TO139, 2011 CT4
`A17`	Guidestar Obs. in Germany, 4 in MPEC 2020-B04 -- 2019 BO1, 2015 BC92, 2014 YW34, 2004 BT58
`246`	KLENOT in the Czech Republic, 3 in MPEC 2020-B04 -- 2020 AQ1, 2020 AD3, 2019 YD3
`K38`	M57 Obs. in Italy, 4 in MPEC 2020-B04 -- 2020 AQ1, 2020 AD3, 2019 XW2, 2017 AE5
`L52`	MASTER Tavrida, 1 in MPEC 2020-B04 -- 106589
`B67`	Mirasteilas Obs. in Switzerland, 3 in MPEC 2020-B04 -- 2019 XG1, 2017 AE5, 2014 NF64
`V01`	Mountainville Obs. in Utah, 1 in MPEC 2020-B04 -- 2020 AQ3
`608`	NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2020-B04 -- 2004 GB2
`C53`	NEOSSat in Earth orbit, 1 in MPEC 2020-B04 -- 2020 AV2
`0895`	N.V. Maigurova via Nikolaev Obs. in Ukraine, 7 in MPEC 2020-B04 -- 2019 UG11, 2019 GT3, 2015 JD1, 99248, 2100, 2059, 1620
`Z80`	Northolt Branch Obs. in England, 1 in MPEC 2020-B04 -- 2020 AN3
`C23`	Olmen Obs. in Belgium, 2 in MPEC 2020-B04 -- 52768, 437316
`J43`	Oukaimeden Obs. in Morocco, 1 in MPEC 2020-B04 -- 2016 UT80
`L18`	QOS Obs., 1 in MPEC 2020-B04 -- 162004
`K61`	Rokycany Obs. in the Czech Republic, 4 in MPEC 2020-B04 -- 2020 AQ1, 2020 AO3, 2020 AN3, 2020 AD3
`C95`	SATINO-1 in France, 1 in MPEC 2020-B04 -- 2015 DY53
`G40-`	program code "-" (22) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-B04 -- 2019 XW2
`G403`	Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-B04 -- 2017 AE5
`587`	Sormano Obs. in Italy, 3 in MPEC 2020-B04 -- 2020 AN3, 2017 AE5, 2012 TO139
`691`	Spacewatch 0.9m telescope in Arizona, 8 in MPEC 2020-B04 -- 2019 YW2, 2019 YD1, 2019 WR6, 2019 WE5, 2019 VF6, 2019 UB11, 2011 UC292, 2006 WF129
`291`	Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2020-B04 -- 2019 YP3, 2019 UX13, 2019 OO, 2019 NY2, 2016 EZ157
`A16`	Tentlingen Obs. in Switzerland, 3 in MPEC 2020-B04 -- 36236, 137925, 11405
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2020-B04 -- 2019 UN8, 2008 XP
`G33`	Wickede Obs. in Germany, 1 in MPEC 2020-B04 -- 437316
`C51`	WISE in Earth polar orbit, 2 in MPEC 2020-B04 -- 2016 LE9, 96744

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

Impact Risk Monitoring on 17 January '20

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS at 2331 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

2020 AN3	JPL Sentry	1640	2106-2106	1	2.041e-06	-3.52	-3.52	0	JPL: Computed at 05:32 today Pacific time based on 119 observations spanning 68.726 days (2019-Nov-09.147003 to 2020-Jan-16.873117). Diameter approximately 0.290 km. from weighted mean H=20.32.

2019 YP3	JPL Sentry	1640	2103-2103	1	5.666e-09	-8.95	-8.95	0	JPL: Computed at 05:31 today Pacific time based on 54 observations spanning 20.794 days (2019-Dec-27.53345 to 2020-Jan-17.32701). Diameter approximately 0.023 km. from weighted mean H=25.89.

2019 YW2	JPL Sentry	1640	2113-2119	2	1.4519e-07	-6.63	-6.77	0	JPL: Computed at 05:34 today Pacific time based on 124 observations spanning 23.786 days (2019-Dec-24.513641 to 2020-Jan-17.29966). Diameter approximately 0.054 km. from weighted mean H=24.01.

2019 WG2	JPL Sentry	1640	2093-2119	51	0.000125139534	-4.06	-4.53	0	JPL: Computed at 05:41 today Pacific time based on 44 observations spanning 52.609 days (2019-Nov-24.495057 to 2020-Jan-16.10374). Diameter approximately 0.035 km. from weighted mean H=24.92.

2019 UN8	JPL Sentry	1640	2101-2105	3	4.8359e-07	-8.57	-8.94	0	JPL: Computed at 05:31 today Pacific time based on 17 observations spanning 4.2547 days (2019-Oct-25.24937 to 2019-Oct-29.504096). Diameter approximately 0.004 km. from weighted mean H=29.70.

2012 BK14	JPL Sentry	1640	2021-2117	666	5.33044401e-05	-5.77	-6.89	0	JPL: Computed at 12:45 April 7th of 2017 Pacific time based on 11 observations spanning .14854 days (2012-Jan-21.317 to 2012-Jan-21.46554). Diameter approximately 0.009 km. from weighted mean H=27.98.

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 17 January '20

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

2015

Generated Traffic Report

1640

Noted that JPL Sentry has updated its 2012 BK14 risk assessment - see above
Noted that JPL Sentry has updated its 2019 UN8 risk assessment - see above
Noted that JPL Sentry has updated its 2019 WG2 risk assessment - see above
Noted that JPL Sentry has updated its 2019 YP3 risk assessment - see above
Noted that JPL Sentry has updated its 2019 YW2 risk assessment - see above
Noted that JPL Sentry has updated its 2020 AN3 risk assessment - see above
Grabbed MPEC 2020-B04 - Daily Orbit Update - see above

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