Contents  on 3 January '19

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 3 January '19

Nine objects reported inside ten LD

There are nine small celestial objects reported traveling within ten lunar distances (LD) of Earth today. Closest is newly announced risk-listed 2019 AB, which enters our planet's sphere of gravitational influence, flying in from 3.53 to 1.77 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
0.51 LD Dec. 28 2018 YO2 4 m  5.06 to 5.92 LD Dec. 16 - Jan. 8 intruder, NHATS target, risk
1.43 LD tomorrow 2019 AB 19 m  1.77 from 3.53 LD Dec. 30 - Jan. 8 NEW, Moon buzzer, enters Earth SOI, risk - MPEC
3.0   LD Jan. 10* 2019 AD 10 m  8.5 from 9.7 LD yesterday - Jan. 18 NEW, EPU +/- 1.15 hours* - MPEC
3.92 LD Dec. 2 2018 TG6 12 m  9.52 to 9.75 LD Oct. 30 - Jan. 5 NHATS target
4.77 LD Dec. 30 2018 YY2 20 m  9.64 to 11.70 LD Dec. 26 - today NEW, exits ten LD - MPEC
6.41 LD Dec. 31 2018 YM2 40 m  9.86 to 11.90 LD Dec. 28 - today exits ten LD
7.3   LD Jan. 9* 2013 YM2 19 m  9.1 from 9.7 LD yesterday - Jan. 16 EPU +/- 3.75 days*, NHATS target
7.8   LD Jan. 6* 2018 XO4 30 m  8.3 from 8.6 LD Dec. 30 - Jan. 13 EPU +/- 17 mins.*, NHATS target
9.05 LD Jan. 5 2018 YR2 17 m  9.17 from 9.43 LD Jan. 1 - 8 NHATS target
* EPU = Earth passage uncertainty

This report was updated at 2220 UTC with three discoveries, all of them in the active traffic table above. Your first neighborhood asteroid traffic report was generated at 1810 UTC with first follow-up in today's DOU MPEC for approaching risk-listed 2018 YQ2.

Approaching - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
5.60 LD Jan. 12 2018 YU2 17 m  10.12 from 11.02 LD tomorrow - Jan. 20 NHATS target
7.47 LD Jan. 10 2018 YQ2 20 m  10.67 from 11.62 LD tomorrow - Jan. 15 NHATS target, risk - DOU



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 3 January '19

The MPC's NEO Confirmation Page has 101 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 101 objects listed. Of these, 74 were "one nighters." So far The Tracking News has counted a total of 112 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 3 January '19

Minor Planet Electronic Circulars

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


MPEC 2019-A30 - "22:55 UT" - 2004 VB61


MPEC 2019-A29 - "20:12 UT" - 2019 AC


MPEC 2019-A28 - "20:07 UT" - 2018 YY2


MPEC 2019-A27 - "20:04 UT" - 2019 AB


MPEC 2019-A26 - "20:01 UT" - 2018 YA3


MPEC 2019-A25 - "19:56 UT" - 2018 YZ2


MPEC 2019-A24 - "19:53 UT" - 2019 AD


MPEC 2019-A23 - "19:17 UT" - 2018 YB3


<< DOU on 3 Jan. '19 >>  MPEC 2019-A22 - "13:06 UT" - Daily Orbit Update


MPEC 2019-A21 - "11:42 UT" - 2018 AG2

Observers  on 3 January '19

A total of 28 observers appear in today's MPECs.

CodeObserver / observatory
T05ATLAS Haleakala in Hawaii, 2 in MPEC 2019-A22 -- 523811, 2340
T08ATLAS Mauna Loa in Hawaii, 3 in MPEC 2019-A22 -- 2018 WR1, 2018 TC3, 2007 YU56
160Castelmartini Obs. in Italy, 12 in MPECs 2019-A22 & 2019-A27 -- 2019 AB, 2018 XV, 2012 MM11, 2009 SV17, 2005 YY36, 90403, 163051, 141053, 137084, 7358, 6178, 5131
734Farpoint Obs. in Kansas, 2 in MPECs 2019-A23 & 2019-A24 -- 2019 AD, 2018 YB3
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2019-A27 -- 2019 AB
K88GINOP-KHK in Hungary, 1 in MPEC 2019-A26 -- 2018 YA3
J95Great Shefford Obs. in England, 3 in MPECs 2019-A25, 2019-A26 & 2019-A27 -- 2019 AB, 2018 YZ2, 2018 YA3
A17Guidestar Obs. in Germany, 2 in MPECs 2019-A22 & 2019-A27 -- 2019 AB, 2018 VB9
568^R. Wainscoat on Mauna Kea in Hawaii, 2 in MPEC 2019-A22 -- 2018 YW2, 2018 XE20
C57MPC code C57, 3 in MPEC 2019-A22 -- 2018 NU3, 2018 KE3, 89959
474Mt. John Obs. in New Zealand, 1 in MPEC 2019-A27 -- 2019 AB
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2019-A21, 2019-A23, 2019-A25 & 2019-A26 -- 2018 YZ2, 2018 YB3, 2018 YA3, 2018 AG2
K74Muensterschwarzach Obs. in Germany, 3 in MPEC 2019-A22 -- 2004 XP14, 1627, 433
I41Palomar Transient Factory in southern California, 1 in MPEC 2019-A28 -- 2018 YY2
F51Pan-STARRS 1 (PS1) in Hawaii, 14 in MPECs 2019-A21, 2019-A22, 2019-A23, 2019-A24, 2019-A25, 2019-A26, 2019-A27, 2019-A28, 2019-A29 & 2019-A30 -- 2019 AD, 2019 AC, 2019 AB, 2018 YZ2, 2018 YY2, 2018 YB3, 2018 YA3, 2018 VB9, 2018 AG2, 2016 RH18, 2009 CR5, 2004 VB61, 2002 XC91, 141053
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2019-A29 -- 2019 AC
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2019-A27 -- 2019 AB
C95SATINO-1 in France, 1 in MPEC 2019-A22 -- 5797
204Schiaparelli Obs. in Italy, 8 in MPEC 2019-A22 -- 2018 YJ2, 2018 YJ, 2018 XV, 2018 VL7, 2009 SV17, 2007 YQ56, 2005 YY36, 2004 XP14
033Schwarzschild Obs. in Germany, 3 in MPECs 2019-A25, 2019-A26 & 2019-A29 -- 2019 AC, 2018 YZ2, 2018 YA3
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-A22 -- 2018 XT2
G40'program code "'" (16) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-A22 -- 329390
W881Tony Evans in Portugal via Slooh.com Chile Obs. in Chile, 1 in MPEC 2019-A22 -- 2018 XV
587Sormano Obs. in Italy, 1 in MPEC 2019-A27 -- 2019 AB
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2019-A22 & 2019-A29 -- 2019 AC, 2018 YQ2, 2018 YF2, 2018 XV5, 2018 VT3, 2018 UY
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 3 in MPEC 2019-A22 -- 2018 YQ2, 2018 XG5, 2018 XB4
L01Visnjan Obs., 6 in MPECs 2019-A23, 2019-A24, 2019-A25, 2019-A26, 2019-A27 & 2019-A28 -- 2019 AD, 2019 AB, 2018 YZ2, 2018 YY2, 2018 YB3, 2018 YA3
718Wiggins Obs. in Utah, 1 in MPEC 2019-A22 -- 2018 XR
C51WISE in Earth polar orbit, 2 in MPEC 2019-A22 -- 2018 TC3, 88263
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 3 January '19

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
2019 ABJPL Sentry21302073-211353.0463194e-06-6.43-6.500JPL: Computed at 13:29 today Pacific time based on 35 observations spanning 2.4841 days (2019-Jan-01.27133 to 2019-Jan-03.755386). Diameter approximately 0.019 km. from weighted mean H=26.29.
2018 YW2JPL Sentry16402050-208131.9257e-06-5.31-5.710JPL: Computed at 07:39 today Pacific time based on 13 observations spanning 2.0914 days (2018-Dec-31.52399 to 2019-Jan-02.615415). Diameter approximately 0.055 km. from weighted mean H=23.95.
NEODyS16402046-209361.33e-06-5.42-5.570NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2018-12-31.525 to 2019-01-02.616."
2018 YQ2JPL Sentry16402077-211765.306556e-07-7.24-7.460JPL: Computed at 07:47 today Pacific time based on 27 observations spanning 3.1952 days (2018-Dec-31.16339 to 2019-Jan-03.35856). Diameter approximately 0.020 km. from weighted mean H=26.14.
NEODyS16402080-211561.47e-07-7.79-8.00NEODyS: "Based on 28 optical observations (of which 1 are rejected as outliers) from 2018-12-31.159 to 2019-01-03.359."
2018 XG5JPL Sentry16402083-208326.61709e-07-3.98-3.980JPL: Computed at 07:34 today Pacific time based on 39 observations spanning 20.928 days (2018-Dec-13.39431 to 2019-Jan-03.322021). Diameter approximately 0.300 km. from weighted mean H=20.28.
NEODyS1640208313.79e-08-5.23-5.230NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2018-12-13.395 to 2019-01-03.323."
2018 XB4JPL Sentry16402052-2118447.4468764e-05-3.94-4.090JPL: Computed at 07:45 today Pacific time based on 38 observations spanning 20.969 days (2018-Dec-13.34358 to 2019-Jan-03.312813). Diameter approximately 0.054 km. from weighted mean H=23.99.
NEODyS16402052-2118667.67e-05-3.95-4.1-NEODyS: "Based on 38 optical observations (of which 0 are rejected as outliers) from 2018-12-13.344 to 2019-01-03.314."

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 3 January '19

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

2300Grabbed MPEC 2019-A30 - 2004 VB61 - see above
2220Updated Traffic Report
2130Noted that JPL Sentry has posted 2019 AB as an impact risk - see above
2035Grabbed MPEC 2019-A26 - 2018 YA3 - see above
Grabbed MPEC 2019-A27 - 2019 AB - see above
Grabbed MPEC 2019-A28 - 2018 YY2 - see above
Grabbed MPEC 2019-A29 - 2019 AC - see above
2001Grabbed MPEC 2019-A24 - 2019 AD - see above
Grabbed MPEC 2019-A25 - 2018 YZ2 - see above
1938Grabbed MPEC 2019-A23 - 2018 YB3 - see above
1640Noted that JPL Sentry has updated its 2018 XB4 risk assessment - see above
Noted that NEODyS has updated its 2018 XB4 risk assessment - see above
Noted that JPL Sentry has updated its 2018 XG5 risk assessment - see above
Noted that NEODyS has updated its 2018 XG5 risk assessment - see above
Noted that JPL Sentry has updated its 2018 YQ2 risk assessment - see above
Noted that NEODyS has updated its 2018 YQ2 risk assessment - see above
Noted that JPL Sentry has updated its 2018 YW2 risk assessment - see above
Noted that NEODyS has updated its 2018 YW2 risk assessment - see above
Grabbed MPEC 2019-A21 - 2018 AG2 - see above
Grabbed MPEC 2019-A22 - Daily Orbit Update - see above