Contents  on 14 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 14 January '20

Eleven objects reported inside ten LD

There are eleven asteroids reported inside ten lunar distances (LD) of Earth today. All are out beyond four 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  6.73 to 8.04 LD Jan. 2 - 16 NHATS target
3.71 LD Jan. 10 2019 YF4 14 m  4.38 to 4.74 LD Dec. 27 - Jan. 25 NHATS target
3.82 LD Jan. 12 2020 AB2 14 m  4.26 to 5.30 LD Jan. 7 - 18 NHATS target
4.76 LD Jan. 6 2020 AW 6 m  8.90 to 9.71 LD Dec. 27 - tomorrow NHATS target, risk
6.5   LD yesterday* 2020 AE1 11 m  6.6 to 6.7 LD Jan. 5 - 21 EPU +/- 1.28 hours*, NHATS target
6.85 LD Jan. 16 2019 YD3 21 m  6.97 from 7.26 LD Jan. 9 - 22 NHATS target - DOU
8.24 LD Jan. 16 2020 AZ1 16 m  8.29 from 8.44 LD Jan. 9 - 22 NHATS target
8.51 LD Jan. 12 2020 AO1 62 m  9.75 to 12.20 LD Jan. 11 - 14 exits ten LD, risk
9.08 LD Jan. 17 2020 AD1 19 m  9.53 from 9.89 LD yesterday - Jan. 22 NHATS target - DOU
9.31 LD today 2020 AO 46 m  9.31 LD yesterday - tomorrow Earth closest at 1812 UTC
9.93 LD yesterday 2020 AX2 27 m  9.97 to 10.21 LD Jan. 12 - 14 NHATS target, exits ten LD - DOU
* EPU = Earth passage uncertainty
Approaching
(none presently known or well calculated until mid-March, see list)

This report was generated at 2116 UTC with follow-up in today's DOU MPEC for inbound objects 2019 YD3 and risk-listed 2020 AD1, outbound 2020 AX2, six departed objects: 2020 AC1, 2019 YA4, 2019 YL, and including three risk-listed -- 2020 AY1, 2019 YW2, and 2019 YV1, and distant 2016 BC14, plus astrometry from October for 2019 UP8.



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. "Distant" is used here to describe an object under observation that has come within ten LD since A/CC began this traffic reporting (2007) but is not now so close. 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 14 January '20

The MPC's NEO Confirmation Page has 21 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 21 objects listed. Of these, fourteen were "one nighters." So far The Tracking News has counted a total of 25 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 14 January '20

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2020-A129 - "15:53 UT" - 2018 VM35


MPEC 2020-A128 - "15:49 UT" - 2018 VG18


MPEC 2020-A127 - "15:00 UT" - 2016 AJ8


MPEC 2020-A126 - "14:44 UT" - 2015 AC246


<< DOU on 14 January '20 >>  MPEC 2020-A125 - "12:01 UT" - Daily Orbit Update

Observers  on 14 January '20

A total of 21 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2020-A125 -- 2020 AP2
160Castelmartini Obs. in Italy, 9 in MPEC 2020-A125 -- 2019 SH6, 1996 AE2, 85628, 512245, 416591, 36284, 137924, 137120, 11066
470Ceccano Obs. in Italy, 1 in MPEC 2020-A125 -- 2020 AV2
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 14 in MPEC 2020-A125 -- 2020 AY2, 2019 YQ3, 2019 YO6, 2019 YM6, 2019 YG3, 2019 XY2, 2019 XC3, 2019 WU4, 2019 WR6, 2019 WG7, 2019 WG4, 2019 UC9, 2017 ME, 2015 JD1
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 12 in MPECs 2020-A125 & 2020-A126 -- 2020 AF2, 2020 AE3, 2020 AC1, 2019 YW2, 2019 YV1, 2019 YL4, 2019 YA2, 2019 WL4, 2019 UX7, 2019 QD6, 2015 XF261, 2015 AC246
304Las Campanas Obs. in Chile, 2 in MPECs 2020-A128 & 2020-A129 -- 2018 VM35, 2018 VG18
5685Scott Sheppard on Mauna Kea in Hawaii, 1 in MPEC 2020-A128 -- 2018 VG18
711McDonald Obs. in Texas, 1 in MPEC 2020-A125 -- 2019 UA11
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2020-A126 -- 2015 AC246
Z80Northolt Branch Obs. in England, 2 in MPEC 2020-A125 -- 2013 AW52, 18172
F52Pan-STARRS 2 (PS2) in Hawaii, 3 in MPECs 2020-A125 & 2020-A126 -- 2019 TJ4, 2015 AC246, 2005 XP66
K63Pascoli Obs. in Italy, 1 in MPEC 2020-A125 -- 214088
C95SATINO-1 in France, 1 in MPEC 2020-A125 -- 1996 AE2
W881Tony Evans in Portugal via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-A125 -- 504074
691Spacewatch 0.9m telescope in Arizona, 12 in MPEC 2020-A125 -- 2020 AQ1, 2019 YW2, 2019 YL, 2019 XJ3, 2019 WR6, 2019 VF6, 2019 UB11, 2019 OA5, 2019 MS3, 2016 AF193, 2015 BC92, 2011 UC292
291Spacewatch 1.8m telescope in Arizona, 12 in MPEC 2020-A125 -- 2020 AY1, 2020 AF2, 2020 AE3, 2019 YQ5, 2019 YP5, 2019 YL4, 2019 YA, 2019 XX, 2019 UO9, 2016 BC14, 2015 MW53, 2010 MU112
I52Steward Obs. Mt. Lemmon Station in Arizona, 22 in MPEC 2020-A125 -- 2020 AY2, 2020 AY1, 2020 AX2, 2020 AT, 2020 AE3, 2020 AD3, 2020 AD1, 2020 AA3, 2019 YW2, 2019 YV, 2019 YU5, 2019 YM6, 2019 YL4, 2019 YK4, 2019 YJ3, 2019 YH4, 2019 YD3, 2019 YA4, 2019 XC3, 2019 XA3, 2019 UP8, 2010 VH1
A16Tentlingen Obs. in Switzerland, 5 in MPEC 2020-A125 -- 214088, 11405, 106538, 6455, 2059
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-A127 -- 2016 AJ8
C51WISE in Earth polar orbit, 4 in MPEC 2020-A125 -- 2006 DY, 489486, 192563, 136993
I41Zwicky Transient Facility (ZTF) in southern California, 8 in MPEC 2020-A125 -- 2019 UO, 2019 QV5, 2017 AE5, 311044, 250577, 243025, 153842, 6455
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 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 AY1NEODyS1700210318.88e-08-7.50-7.50NEODyS: "Based on 86 optical observations (of which 1 are rejected as outliers) from 2020-01-05.242 to 2020-01-14.430."
2020 AC1JPL Sentry17002093-211773.8132e-06-7.48-8.010JPL: Computed at 06:13 today Pacific time based on 43 observations spanning 9.8722 days (2020-Jan-04.267512 to 2020-Jan-14.1397). Diameter approximately 0.007 km. from weighted mean H=28.41.
NEODyS17002093-2117177.3e-06-7.20-7.850NEODyS: "Based on 43 optical observations (of which 0 are rejected as outliers) from 2020-01-04.268 to 2020-01-14.141."
2019 YW2JPL Sentry17002113-211943.08356e-07-6.32-6.670JPL: Computed at 05:32 today Pacific time based on 116 observations spanning 20.791 days (2019-Dec-24.513641 to 2020-Jan-14.30453). Diameter approximately 0.054 km. from weighted mean H=24.00.
NEODyS17002106-211531.32e-07-6.68-6.780NEODyS: "Based on 118 optical observations (of which 4 are rejected as outliers) from 2019-12-24.514 to 2020-01-14.305."
2019 YA2NEODyS1700210114.46e-10-8.40-8.40NEODyS: "Based on 80 optical observations (of which 0 are rejected as outliers) from 2019-12-20.486 to 2020-01-14.279."
2019 YV1JPL Sentry17002089-211881.7403478e-05-5.24-5.290JPL: Computed at 05:38 today Pacific time based on 83 observations spanning 23.999 days (2019-Dec-21.11125 to 2020-Jan-14.11034). Diameter approximately 0.032 km. from weighted mean H=25.10.
NEODyS17002089-2118131.57e-05-5.29-5.350NEODyS: "Based on 83 optical observations (of which 0 are rejected as outliers) from 2019-12-21.112 to 2020-01-14.111."

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 14 January '20

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

2116Generated Traffic Report
1700Noted that NEODyS has updated its 2019 YA2 risk assessment - see above
Noted that JPL Sentry has updated its 2019 YV1 risk assessment - see above
Noted that NEODyS has updated its 2019 YV1 risk assessment - see above
Noted 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 updated its 2020 AC1 risk assessment - see above
Noted that NEODyS has updated its 2020 AC1 risk assessment - see above
Noted that NEODyS has updated its 2020 AY1 risk assessment - see above
Grabbed MPEC 2020-A125 - Daily Orbit Update - see above
Grabbed MPEC 2020-A126 - 2015 AC246 - see above
Grabbed MPEC 2020-A127 - 2016 AJ8 - see above
Grabbed MPEC 2020-A128 - 2018 VG18 - see above
Grabbed MPEC 2020-A129 - 2018 VM35 - see above