Contents  on 13 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 13 January '20

Twelve objects reported inside ten LD

There are twelve minor objects reported inside ten lunar distances (LD) of our planet today. The two nearest are 2020 AB2, heading out from 3.82 to 4.26 LD, and 2019 YF4, outbound from 4.07 to 4.38 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  5.46 to 6.73 LD Jan. 2 - 16 NHATS target
3.71 LD Jan. 10 2019 YF4 14 m  4.07 to 4.38 LD Dec. 27 - Jan. 25 NHATS target
3.82 LD yesterday 2020 AB2 14 m  3.82 to 4.26 LD Jan. 7 - 18 NHATS target - DOU
4.76 LD Jan. 6 2020 AW 6 m  8.13 to 8.90 LD Dec. 27 - Jan. 15 NHATS target, risk
6.33 LD Jan. 11 2019 WC5 105 m  8.11 to 10.19 LD Jan. 8 - 13 exits ten LD
6.5   LD today* 2020 AE1 11 m  6.5 LD Jan. 5 - 21 EPU +/- 1.28 hours*, NHATS target,
Earth closest at 1349 UTC
6.85 LD Jan. 16 2019 YD3 21 m  7.26 from 7.69 LD Jan. 9 - 22 NHATS target - DOU
8.24 LD Jan. 16 2020 AZ1 16 m  8.44 from 8.68 LD Jan. 9 - 22 NHATS target - DOU
8.51 LD yesterday 2020 AO1 62 m  8.54 to 9.75 LD Jan. 11 - 14 risk
9.08 LD Jan. 17 2020 AD1 18 m  9.89 from 10.34 LD today - Jan. 22 NHATS target, enters ten LD
9.31 LD tomorrow 2020 AO 46 m  9.89 from 12.08 LD today - Jan. 15 enters ten LD
9.93 LD today 2020 AX2 28 m  9.93 LD yesterday - tomorrow NHATS target, Earth closest at 0957 UTC
* EPU = Earth passage uncertainty
Approaching - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
(none presently known or well calculated until mid-March, see list)

This report was generated at 1916 UTC with follow-up in today's DOU MPEC for inbound objects 2020 AZ1 and 2019 YD3, outbound 2020 AB2, and departed risk-listed 2020 AY1.

For more information, see our new "Earth's Busy Neighborhood" page with its improved traffic reporting.



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 13 January '20

The MPC's NEO Confirmation Page has 7 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seven objects listed. Of these, four 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 13 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-A124 - "15:01 UT" - 2015 CW13


<< DOU on 13 January '20 >>  MPEC 2020-A123 - "12:01 UT" - Daily Orbit Update


MPEC 2020-A122 - "02:01 UT" - 2019 YD2

Observers  on 13 January '20

Eighteen observers appear in today's MPECs.

CodeObserver / observatory
160Castelmartini Obs. in Italy, 15 in MPEC 2020-A123 -- 2019 YK4, 2019 YD3, 2019 XW2, 2019 XG1, 2014 NF64, 52768, 458745, 409342, 311044, 30825, 243025, 214088, 203015, 137199, 13651
470Ceccano Obs. in Italy, 1 in MPEC 2020-A123 -- 2020 AV2
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 29 in MPEC 2020-A123 -- 2020 AZ1, 2019 YZ3, 2019 YV3, 2019 YQ5, 2019 YN6, 2019 YM3, 2019 YL6, 2019 YL1, 2019 YG1, 2019 YE2, 2019 YD1, 2019 YC4, 2019 YC, 2019 XZ2, 2019 XP3, 2019 XG3, 2019 XF1, 2019 XB2, 2019 WZ, 2019 WR3, 2019 WP3, 2019 WB6, 2019 UJ2, 2019 UJ15, 2019 UG7, 2019 UG5, 2019 UA14, 2019 RD, 2019 NE1
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2020-A123 -- 276397
J95Great Shefford Obs. in England, 4 in MPEC 2020-A123 -- 2020 AY1, 2020 AB2, 2019 YH, 2012 BU61
695Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2020-A123 -- 2020 AV2
130Lumezzane Obs. in Italy, 2 in MPEC 2020-A123 -- 2020 AV2, 25330
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2020-A122 -- 2019 YD2
K74Muensterschwarzach Obs. in Germany, 2 in MPEC 2020-A123 -- 437316, 18172
C82Nastro Verde Obs. in Italy, 1 in MPEC 2020-A123 -- 2020 AV2
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2020-A123 -- 2004 BF85
J69North Obs. in England, 1 in MPEC 2020-A123 -- 437316
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2020-A123 -- 437316
C95SATINO-1 in France, 1 in MPEC 2020-A123 -- 2014 YU43
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2020-A122 -- 2019 YD2
W34Squirrel Valley Obs. in North Carolina, 2 in MPEC 2020-A123 -- 437316, 333555
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-A124 -- 2015 CW13
I41Zwicky Transient Facility (ZTF) in southern California, 4 in MPEC 2020-A123 -- 85236, 333555, 243025, 137064
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 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
2020 AY1JPL Sentry1630R E M O V E DJPL: Risk listing removed at 1347 UTC today
NEODyS1630210319.19e-08-7.48-7.480NEODyS: "Based on 80 optical observations (of which 1 are rejected as outliers) from 2020-01-05.242 to 2020-01-12.992."
2019 YX1NEODyS0100R E M O V E D-
2015 TC25JPL Sentry2001R E M O V E DJPL: Risk listing removed at 1939 UTC today

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 13 January '20

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

2001Noted that JPL Sentry has removed 2015 TC25 as an impact risk - see above
1916Generated Traffic Report
1630Noted that JPL Sentry has removed 2020 AY1 as an impact risk - see above
Noted that NEODyS has updated its 2020 AY1 risk assessment - see above
Grabbed MPEC 2020-A123 - Daily Orbit Update - see above
Grabbed MPEC 2020-A124 - 2015 CW13 - see above
0203Grabbed MPEC 2020-A122 - 2019 YD2 - see above
0100Noted that NEODyS has removed 2019 YX1 as an impact risk - see above