Contents  on 16 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 16 January '20

Nine objects reported inside ten LD

There are nine small celestial objects reported to be within ten lunar distances (LD) of Earth today. All of them are out beyond five 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  9.38 to 10.73 LD Jan. 2 - 16 NHATS target, exits ten LD
3.71 LD Jan. 10 2019 YF4 14 m  5.16 to 5.62 LD Dec. 27 - Jan. 25 NHATS target
3.82 LD Jan. 12 2020 AB2 14 m  6.66 to 8.18 LD Jan. 7 - 18 NHATS target
6.04 LD tomorrow 2020 AL3 20 m  6.04 from 6.74 LD Jan. 14 - 19 DOU
6.5   LD Jan. 13* 2020 AE1 11 m  6.9 to 7.3 LD Jan. 5 - 21 EPU +/- 1.28 hours*, NHATS target
6.85 LD today 2019 YD3 21 m  6.85 LD Jan. 9 - 22 NHATS target, Earth closest at 0434 UTC - DOU
7.92 LD tomorrow 2020 AN3 288 m  7.93 from 8.93 LD yesterday - Jan. 18 risk - DOU
8.24 LD today 2020 AZ1 16 m  8.24 LD Jan. 9 - 22 NHATS target, Earth closest at 0057 UTC
9.08 LD tomorrow 2020 AD1 19 m  9.13 from 9.28 LD Jan. 13 - 22 NHATS target
Approaching - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
7.44 LD Jan. 19 2020 AM3 34 m  11.61 from 14.84 LD tomorrow - Jan. 20 DOU
8.3   LD Jan. 25* 2020 AK3 22 m  15.4 from 16.8 LD Jan. 21 - 28 EPU +/- 30 mins.*, NHATS target - DOU
* EPU = Earth passage uncertainty

This report was generated at 1910 UTC with the discovery of already departed 2020 AP3 (MPEC), which flew past at about 6.5 LD on January 1st (uncertainty +/- 9.27 hours), and with follow-up in today's DOU MPEC for approaching objects 2020 AM3 and 2020 AK3, inbound 2020 AL3 and risk-listed 2020 AN3 (including prediscovery positions from November-December), passing 2019 YD3, and departed 2020 AH3 and risk-listed 2019 YW2.

You may have noticed that our new "Earth's Busy Neighborhood" page often gives a traffic count different from the report you are reading here. That's because the report here gives an all-up count for the day while the new report 1) gives a count in the hour stated and 2) sometimes has newer information.



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 16 January '20

The MPC's NEO Confirmation Page has 8 listings

When last checked at 2330 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eight objects listed. Of these, four were "one nighters." So far The Tracking News has counted a total of eleven 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 16 January '20

Minor Planet Electronic Circulars

As of last check at 2330 UTC, there have been three MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 16 January '20 >>  MPEC 2020-B03 - "12:02 UT" - Daily Orbit Update


MPEC 2020-B02 - "01:51 UT" - 2020 AQ3


MPEC 2020-B01 - "01:47 UT" - 2020 AP3

Observers  on 16 January '20

A total of 20 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 16 in MPEC 2020-B03 -- 2019 YD3, 2019 XW2, 2019 UB11, 2016 XO23, 2014 NF64, 2013 AW52, 2012 BD124, 2004 BT58, 52768, 437316, 329340, 162825, 138013, 11405, 103067, 5626
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2020-B03 -- 2020 AV2
160Castelmartini Obs. in Italy, 6 in MPEC 2020-B03 -- 2008 LW16, 340666, 311044, 25916, 13651, 9400
Z99Clixby Obs. in England, 7 in MPEC 2020-B03 -- 2020 AQ3, 2020 AQ1, 2020 AH3, 2020 AH1, 2019 XG1, 2019 SH6, 2018 BP
E89Geyserland Obs. in New Zealand, 2 in MPEC 2020-B03 -- 137925, 106538
J95Great Shefford Obs. in England, 3 in MPECs 2020-B02 & 2020-B03 -- 2020 AQ3, 2020 AO3, 2020 AK3
695^Spacewatch via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2020-B03 -- 2019 YP5
246KLENOT in the Czech Republic, 4 in MPEC 2020-B03 -- 2020 AM3, 2020 AL3, 2012 TO139, 3102
Z43Landehen Obs., 1 in MPEC 2020-B03 -- 2020 AN3
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2020-B01 & 2020-B02 -- 2020 AQ3, 2020 AP3
B67Mirasteilas Obs. in Switzerland, 5 in MPEC 2020-B03 -- 2019 YK4, 2019 XW2, 2019 QV5, 2019 PR2, 2001 YM4
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2020-B01, 2020-B02 & 2020-B03 -- 2020 AQ3, 2020 AP3, 2020 AN3
C53NEOSSat in Earth orbit, 1 in MPEC 2020-B03 -- 2020 AV2
C95SATINO-1 in France, 2 in MPEC 2020-B03 -- 2015 BC92, 99942
204Schiaparelli Obs. in Italy, 11 in MPEC 2020-B03 -- 2020 AX, 2019 YA, 2019 XW2, 2019 WR6, 2019 WH6, 2019 SH6, 2019 BO1, 2012 BU61, 2010 AE30, 2004 BT58, 348595
G40%program code "%" (14) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-B03 -- 2020 AV2
G40-program code "-" (22) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-B03 -- 2020 AD3
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2020-B03 -- 2019 YW2
I52Steward Obs. Mt. Lemmon Station in Arizona, 2 in MPECs 2020-B01 & 2020-B02 -- 2020 AQ3, 2020 AP3
A16Tentlingen Obs. in Switzerland, 6 in MPEC 2020-B03 -- 2014 NF64, 214088, 13651, 111253, 106589, 9400
I41Zwicky Transient Facility (ZTF) in southern California, 4 in MPEC 2020-B03 -- 68950, 443103, 141079, 1943
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 January '20

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2330 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 Sentry16302106-210615.123e-06-3.14-3.140JPL: Computed at 05:29 today Pacific time based on 102 observations spanning 67.676 days (2019-Nov-09.147003 to 2020-Jan-15.82326). Diameter approximately 0.290 km. from weighted mean H=20.35.
NEODyS1630210611.41e-05-2.71-2.710NEODyS: "Based on 111 optical observations (of which 3 are rejected as outliers) from 2019-11-09.148 to 2020-01-15.824."
2019 YW2JPL Sentry16302119-211926.165e-08-7.02-7.150JPL: Computed at 05:31 today Pacific time based on 118 observations spanning 21.927 days (2019-Dec-24.513641 to 2020-Jan-15.44075). Diameter approximately 0.054 km. from weighted mean H=24.00.
NEODyS16302113-211531.47e-07-6.64-6.730NEODyS: "Based on 120 optical observations (of which 4 are rejected as outliers) from 2019-12-24.514 to 2020-01-15.442."

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 16 January '20

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

1910Generated Traffic Report
1630Noted that JPL Sentry has updated its 2019 YW2 risk assessment - see above
Noted that NEODyS has updated its 2019 YW2 risk assessment - see above
Noted that JPL Sentry has posted 2020 AN3 as an impact risk - see above
Noted that NEODyS has posted 2020 AN3 as an impact risk - see above
Grabbed MPEC 2020-B03 - Daily Orbit Update - see above
0500Grabbed MPEC 2020-B01 - 2020 AP3 - see above
Grabbed MPEC 2020-B02 - 2020 AQ3 - see above