Contents  on 6 February '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 6 February '19

Two objects reported inside ten LD

There are two asteroids reported within ten lunar distances (LD) of Earth today. 2019 BK4 comes its closest to our planet this time around -- 4.14 LD, and 2019 BR3 leaves our ten-LD traffic reporting "bubble," traveling from about 8.1 to 10.4 LD*.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41 & 5.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
1.6   LD Feb. 2* 2019 BR3 9 m  8.1 to 10.4 LD Jan. 29 - today EPU +/- 9 mins.*, NHATS target, exits ten LD
4.14 LD today 2019 BK4 13 m  4.14 LD Feb. 1 - 10 NHATS target, Earth closest at 0128 UTC
Approaching - sorted by 10-LD bubble entry date
7.3   LD Feb. 12* 2017 PV25 41 m  10.5 from 11.5 LD tomorrow - Feb. 17 EPU +/- 1.07 hours*, NHATS target
7.4   LD Feb. 25* 2019 CJ 24 m  22.0 from 23.1 LD Feb. 19 - March 3 EPU +/- 24 mins.*, note: based on
incomplete data, NHATS target - DOU
* EPU = Earth passage uncertainty

This report was generated at 2245 UTC with follow-up in today's DOU MPEC for departed objects 2019 AU and 2018 YK2. Also for approaching 2019 CJ, but JPL has not updated its orbit solution using the new data.

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 6 February '19

The MPC's NEO Confirmation Page has 107 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 107 objects listed. Of these, 52 were "one nighters." So far The Tracking News has counted a total of 114 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 6 February '19

Minor Planet Electronic Circulars

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

<< DOU on 6 Feb. '19 >>  MPEC 2019-C30 - "13:11 UT" - Daily Orbit Update

Observers  on 6 February '19

A total of 27 observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 16 in MPEC 2019-C30 -- 2019 AU, 2019 AT7, 2019 AP8, 2019 AO6, 2019 AM, 2018 YL, 2018 YK2, 2018 VS9, 2016 RP1, 2014 VK2, 2008 XW2, 2006 DT14, 344143, 277279, 225586, 138852
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2019-C30 -- 2012 BC124
C77Bernezzo Obs. in Italy, 1 in MPEC 2019-C30 -- 2013 CW32
160Castelmartini Obs. in Italy, 1 in MPEC 2019-C30 -- 2012 BC124
107Cavezzo Obs. in Italy, 1 in MPEC 2019-C30 -- 2012 BC124
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2019-C30 -- 153243
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPEC 2019-C30 -- 99942, 455184
E89Geyserland Obs. in New Zealand, 9 in MPEC 2019-C30 -- 90403, 21088, 18736, 163051, 154652, 7889, 6178, 4055, 433
203GiaGa Obs. in Italy, 1 in MPEC 2019-C30 -- 2012 BC124
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2019-C30 -- 2013 CW32
168Kourovskaya Obs. in Russia, 3 in MPEC 2019-C30 -- 455550, 3200, 2061
V37LCO McDonald Obs. in Texas, 2 in MPEC 2019-C30 -- 2019 BF1, 455176
568^R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2019-C30 -- 2019 CJ
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2019-C30 -- 2012 BC124
C47Nonndorf Obs. in Austria, 1 in MPEC 2019-C30 -- 2012 BC124
Z80Northolt Branch Obs. in England, 1 in MPEC 2019-C30 -- 2013 CW32
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2019-C30 -- 2012 BC124
A53Peschiera del Garda Obs. in Italy, 1 in MPEC 2019-C30 -- 2013 CW32
104San Marcello Pistoiese Obs. in Italy, 2 in MPEC 2019-C30 -- 2013 CW32, 2012 BC124
C95SATINO-1 in France, 1 in MPEC 2019-C30 -- 277473
204Schiaparelli Obs. in Italy, 7 in MPEC 2019-C30 -- 2019 AQ9, 2019 AP3, 2018 UZ, 2013 RV9, 2011 XE1, 2008 SW11, 2005 BG14
033Schwarzschild Obs. in Germany, 1 in MPEC 2019-C30 -- 2012 BC124
G40!M. Kumrucu-Lohmiller in Massachusetts via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-C30 -- 2019 AP3
G40'program code "'" (16) via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-C30 -- 2012 OP4
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2019-C30 -- 2012 BC124
954Teide Obs. in the Canary Islands, 2 in MPEC 2019-C30 -- 2019 AA9, 2004 XP14
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2019-C30 -- 2017 BK123
L01Visnjan Obs., 1 in MPEC 2019-C30 -- 2012 BC124
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 February '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.





Notes for Today's Latest Risk Assessments
2019 BE5NEODyS20302038-2090221.97e-05-4.42-4.510NEODyS: "Based on 68 optical observations (of which 0 are rejected as outliers) from 2019-01-31.325 to 2019-02-04.888."
2019 BB5NEODyS2030210911.96e-07-7.90-7.90NEODyS: "Based on 59 optical observations (of which 0 are rejected as outliers) from 2019-01-30.357 to 2019-02-04.917."

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 6 February '19

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

2245Generated Traffic Report
2030Noted that NEODyS has updated its 2019 BB5 risk assessment - see above
Noted that NEODyS has updated its 2019 BE5 risk assessment - see above
Grabbed MPEC 2019-C30 - Daily Orbit Update - see above