Contents  on 17 January '20

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 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

Observers  on 17 January '20

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

CodeObserver / observatory
H21Astronomical 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
Z36Cancelada Obs., 1 in MPEC 2020-B04 -- 248926
160Castelmartini 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
J04ESA 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
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2020-B04 -- 2020 AL3
203GiaGa Obs. in Italy, 4 in MPEC 2020-B04 -- 2020 AQ1, 2020 AM3, 2012 TO139, 2011 CT4
A17Guidestar Obs. in Germany, 4 in MPEC 2020-B04 -- 2019 BO1, 2015 BC92, 2014 YW34, 2004 BT58
246KLENOT in the Czech Republic, 3 in MPEC 2020-B04 -- 2020 AQ1, 2020 AD3, 2019 YD3
K38M57 Obs. in Italy, 4 in MPEC 2020-B04 -- 2020 AQ1, 2020 AD3, 2019 XW2, 2017 AE5
L52MASTER Tavrida, 1 in MPEC 2020-B04 -- 106589
B67Mirasteilas Obs. in Switzerland, 3 in MPEC 2020-B04 -- 2019 XG1, 2017 AE5, 2014 NF64
V01Mountainville Obs. in Utah, 1 in MPEC 2020-B04 -- 2020 AQ3
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2020-B04 -- 2004 GB2
C53NEOSSat in Earth orbit, 1 in MPEC 2020-B04 -- 2020 AV2
0895N.V. Maigurova via Nikolaev Obs. in Ukraine, 7 in MPEC 2020-B04 -- 2019 UG11, 2019 GT3, 2015 JD1, 99248, 2100, 2059, 1620
Z80Northolt Branch Obs. in England, 1 in MPEC 2020-B04 -- 2020 AN3
C23Olmen Obs. in Belgium, 2 in MPEC 2020-B04 -- 52768, 437316
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2020-B04 -- 2016 UT80
L18QOS Obs., 1 in MPEC 2020-B04 -- 162004
K61Rokycany Obs. in the Czech Republic, 4 in MPEC 2020-B04 -- 2020 AQ1, 2020 AO3, 2020 AN3, 2020 AD3
C95SATINO-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
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-B04 -- 2017 AE5
587Sormano Obs. in Italy, 3 in MPEC 2020-B04 -- 2020 AN3, 2017 AE5, 2012 TO139
691Spacewatch 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
291Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2020-B04 -- 2019 YP3, 2019 UX13, 2019 OO, 2019 NY2, 2016 EZ157
A16Tentlingen Obs. in Switzerland, 3 in MPEC 2020-B04 -- 36236, 137925, 11405
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2020-B04 -- 2019 UN8, 2008 XP
G33Wickede Obs. in Germany, 1 in MPEC 2020-B04 -- 437316
C51WISE 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 AN3JPL Sentry16402106-210612.041e-06-3.52-3.520JPL: 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 YP3JPL Sentry16402103-210315.666e-09-8.95-8.950JPL: 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 YW2JPL Sentry16402113-211921.4519e-07-6.63-6.770JPL: 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 WG2JPL Sentry16402093-2119510.000125139534-4.06-4.530JPL: 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 UN8JPL Sentry16402101-210534.8359e-07-8.57-8.940JPL: 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 BK14JPL Sentry16402021-21176665.33044401e-05-5.77-6.890JPL: 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.

2015Generated Traffic Report
1640Noted 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