Contents  on 12 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 12 January '20

Eleven objects reported inside ten LD

There are eleven asteroidal objects reported to be less than ten lunar distances (LD) from Earth today. Nearest are 2020 AB2, which comes its closest to our planet this time around -- 3.81 LD at 2236 UTC, and 2019 YF4, outbound from 3.86 to 4.07 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  4.27 to 5.46 LD Jan. 2 - 16 NHATS target
3.71 LD Jan. 10 2019 YF4 14 m  3.86 to 4.07 LD Dec. 27 - Jan. 25 NHATS target - DOU
3.8   LD today* 2020 AB2 14 m  3.8 LD Jan. 7 - 18 EPU +/- 10 mins.*, NHATS target,
Earth closest at 2236 UTC
4.13 LD Jan. 6 2020 AU1 17 m  9.35 to 10.62 LD Dec. 30 - today exits ten LD
4.76 LD Jan. 6 2020 AW 6 m  7.38 to 8.13 LD Dec. 27 - Jan. 15 NHATS target, risk
6.33 LD yesterday 2019 WC5 105 m  6.69 to 8.11 LD Jan. 8 - 13
6.5   LD tomorrow* 2020 AE1 11 m  6.6 from 6.7 LD Jan. 5 - 21 EPU +/- 1.28 hours*, NHATS target
6.85 LD Jan. 16 2019 YD3 21 m  7.69 from 8.25 LD Jan. 9 - 22 NHATS target - DOU
8.2   LD Jan. 16* 2020 AZ1 16 m  8.7 from 9.0 LD Jan. 9 - 22 EPU +/- 5 mins.*, NHATS target
8.51 LD today 2020 AO1 62 m  8.51 LD yesterday - Jan. 14 Earth closest at 1917 UTC, risk
9.93 LD tomorrow 2020 AX2 28 m  9.95 from 10.16 LD today - Jan. 14 NHATS target, enters ten LD
Approaching - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
9.08 LD Jan. 17 2020 AD1 18 m  10.34 from 10.87 LD tomorrow - Jan. 22 NHATS target
9.31 LD Jan. 14 2020 AO 46 m  12.08 from 15.24 LD tomorrow - Jan. 15
* EPU = Earth passage uncertainty

This report was generated at 2025 UTC with follow-up in today's DOU MPEC for inbound 2019 YD3 and outbound 2019 YF4, plus astrometry from September for 2019 SW5 and 2019 SE5

We will soon discontinue this daily traffic reporting feature in The Tracking News and refer everyone to our new "Earth's Busy Neighborhood" page, which debuted January 1st with improved traffic reporting and has continued to evolve.



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 12 January '20

The MPC's NEO Confirmation Page has 12 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had twelve objects listed. Of these, nine 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 12 January '20

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2020-A121 - "23:52 UT" - Comet P/2019 X2 (Pan-STARRS)


MPEC 2020-A120 - "23:29 UT" - A/2019 Y5


MPEC 2020-A119 - "23:24 UT" - A/2020 A1


MPEC 2020-A118 - "22:39 UT" - 2020 AF3


<< DOU on 12 January '20 >>  MPEC 2020-A117 - "12:01 UT" - Daily Orbit Update

Observers  on 12 January '20

A total of 26 observers appear in today's MPECs.

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2020-A117 -- 5626
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPEC 2020-A117 -- 2020 AN, 2019 YF4, 2019 YA6, 2019 XF3, 2019 SW5, 2019 SE5, 412976
160Castelmartini Obs. in Italy, 6 in MPEC 2020-A117 -- 2013 PV2, 2008 LW16, 99248, 86326, 338347, 106538
V06Catalina Sky Survey Kuiper Telescope in Arizona, 1 in MPEC 2020-A118 -- 2020 AF3
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2020-A119 & 2020-A120 -- 2020 A1, 2019 Y5
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2020-A117 -- 2019 YD3
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2020-A120 & 2020-A121 -- 2019 Y5, P/2019 X2
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2020-A118 -- 2020 AF3
C10Maisoncelles Obs. in France, 1 in MPEC 2020-A121 -- P/2019 X2
474Mt. John Obs. in New Zealand, 1 in MPEC 2020-A120 -- 2019 Y5
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2020-A118 -- 2020 AF3
K74Muensterschwarzach Obs. in Germany, 2 in MPEC 2020-A117 -- 2016 XO23, 1866
644NEAT's Mt. Palomar telescope in southern California, 2 in MPEC 2020-A117 -- 2002 AZ1, 2001 SA170
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2020-A117 -- 2006 QJ65
Z80Northolt Branch Obs. in England, 3 in MPEC 2020-A117 -- 2014 NF64, 437316, 333555
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPECs 2020-A117, 2020-A120 & 2020-A121 -- 2019 Y5, P/2019 X2, 2002 KK3
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2020-A121 -- P/2019 X2
C95SATINO-1 in France, 1 in MPEC 2020-A117 -- 1996 AE2
204Schiaparelli Obs. in Italy, 3 in MPECs 2020-A117 & 2020-A121 -- 2020 AV2, P/2019 X2, 2008 LW16
Q11Shinshiro Obs., 1 in MPEC 2020-A121 -- P/2019 X2
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2020-A119 & 2020-A121 -- 2020 A1, P/2019 X2
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2020-A119 & 2020-A120 -- 2020 A1, 2019 Y5
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-A117 -- 2019 RU2
L01Visnjan Obs., 1 in MPEC 2020-A121 -- P/2019 X2
C51WISE in Earth polar orbit, 1 in MPEC 2020-A119 -- 2020 A1
I41Zwicky Transient Facility (ZTF) in southern California, 5 in MPEC 2020-A117 -- 2019 YD2, 416231, 248926, 137099, 3200
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 January '20

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2359 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
2011 ES4NEODyS04442031-21151336.27e-05-4.70-5.140NEODyS: "Based on 47 optical observations (of which 3 are rejected as outliers) from 2011-03-02.199 to 2011-03-06.236."
2010 DG77JPL Sentry19052021-21175667.383039e-06-4.84-6.270JPL: Computed at 09:40 April 7th of 2017 Pacific time based on 10 observations spanning .59543 days (2010-Feb-19.17573 to 2010-Feb-19.77116). Diameter approximately 0.044 km. from weighted mean H=24.47.

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 12 January '20

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

2359Grabbed MPEC 2020-A121 - Comet P/2019 X2 (Pan-STARRS) - see above
2332Grabbed MPEC 2020-A119 - A/2020 A1 - see above
Grabbed MPEC 2020-A120 - A/2019 Y5 - see above
2300Grabbed MPEC 2020-A118 - 2020 AF3 - see above
2025Generated Traffic Report
1905Noted that JPL Sentry has updated its 2010 DG77 risk assessment - see above
1630Grabbed MPEC 2020-A117 - Daily Orbit Update - see above
0444Noted that NEODyS has updated its 2011 ES4 risk assessment - see above