Contents  on 14 March '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 14 March '19

Nine objects reported inside ten LD

Nine transient natural objects are reported to be less than ten lunar distances (LD) from our planet today. Nearest are risk-listed 2019 DJ1, outbound from 4.14 to 4.40 LD, and newly announced 2019 EF2, which comes its closest to Earth on this passage -- 4.48 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
0.8   LD March 22* 2019 EA2 22 m  8.3 from 9.4 LD yesterday - March 30 EPU +/- 9 mins.*, intruder, NHATS target, risk - DOU
1.59 LD March 11 2019 EW1 14 m  7.70 to 10.24 LD March 7 - 14 exits ten LD
4.04 LD March 12 2019 DJ1 15 m  4.14 to 4.40 LD March 2 - 23 NHATS target, risk
4.48 LD today 2019 EF2 24 m  4.48 LD March 10 - 19 NEW, Earth closest at 1902 UTC - MPEC, DOU
6.46 LD March 8 2019 EF1 20 m  9.42 to 10.46 LD March 3 - 14 NHATS target, exits ten LD
7.59 LD March 11 2019 DH 39 m  9.11 to 10.60 LD March 9 - 14 exits ten LD
7.7   LD yesterday* 2012 VZ19 26 m  7.8 to 8.3 LD March 9 - 16 EPU +/- 3.65 days*, NHATS target
8.52 LD March 18 2019 DH1 20 m  9.36 from 9.87 LD yesterday - March 23 NHATS target
9.02 LD March 16 2019 ES 30 m  9.25 from 9.72 LD yesterday - March 19 NHATS target
* EPU = Earth passage uncertainty

This report was generated at 1850 UTC with the discovery of passing 2019 EF2 (MPEC, DOU) and with follow-up in today's DOU MPEC for inbound risk-listed intruder 2019 EA2.

Approaching - sorted by 10-LD bubble entry date
9.69 LD March 27 2019 EN 203 m  42.47 from 45.87 LD March 26 - 27
3.9   LD April 4* 2016 GE1 16 m  47.5 from 49.9 LD March 31 - April 8 EPU +/- 4.90 days*



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 14 March '19

The MPC's NEO Confirmation Page has 11 listings

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

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.


<< DOU on 14 Mar. '19 >>  MPEC 2019-E95 - "12:06 UT" - Daily Orbit Update


MPEC 2019-E94 - "11:16 UT" - 2019 EF2


MPEC 2019-E93 - "10:44 UT" - 2016 GG216

Observers  on 14 March '19

A total of 32 observers appear in today's MPECs.

CodeObserver / observatory
C97Al-Fulaij Obs., 1 in MPEC 2019-E95 -- 18736
H21Astronomical Research Obs. Westfield in Illinois, 14 in MPEC 2019-E95 -- 2019 DU1, 2019 DF1, 2019 DE, 2019 CV, 2019 BP1, 2019 AN2, 2018 YD3, 2018 VY7, 2008 PW4, 2007 EF, 2005 GL, 2002 KJ3, 2000 WJ10, 1999 AJ39
T08ATLAS Mauna Loa in Hawaii, 4 in MPECs 2019-E94 & 2019-E95 -- 2019 EQ, 2019 EF2, 2019 CL2, 2019 BF4
C77Bernezzo Obs. in Italy, 1 in MPEC 2019-E94 -- 2019 EF2
160Castelmartini Obs. in Italy, 7 in MPEC 2019-E95 -- 2016 EO84, 512245, 459462, 417581, 410088, 275611, 152742
G58Chabot Obs. in northern California, 2 in MPEC 2019-E95 -- 2019 EQ1, 2009 BL71
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2019-E95 -- 2019 EC2
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2019-E95 -- 396593
J95Great Shefford Obs. in England, 1 in MPEC 2019-E94 -- 2019 EF2
511Haute Provence Obs. in Germany, 1 in MPEC 2019-E95 -- 2019 EF2
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2019-E94 -- 2019 EF2
K38M57 Obs. in Italy, 3 in MPECs 2019-E94 & 2019-E95 -- 2019 EF2, 2019 CL2, 2019 CD5
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2019-E95 -- 2014 QR295
568Mauna Kea in Hawaii, 1 in MPEC 2019-E93 -- 2016 GG216
J69North Obs. in England, 1 in MPEC 2019-E94 -- 2019 EF2
Z80Northolt Branch Obs. in England, 1 in MPEC 2019-E94 -- 2019 EF2
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2019-E93 & 2019-E95 -- 2017 RE110, 2016 GG216
K63Pascoli Obs. in Italy, 1 in MPEC 2019-E94 -- 2019 EF2
323Perth Obs. in Western Australia, 5 in MPEC 2019-E95 -- 2019 ED2, 2019 EC2, 2019 AP3, 163081, 141484
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2019-E94 -- 2019 EF2
L18QOS Obs., 1 in MPEC 2019-E94 -- 2019 EF2
L04ROASTERR-1 in Romania, 1 in MPEC 2019-E94 -- 2019 EF2
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2019-E94 -- 2019 EF2
C95SATINO-1 in France, 1 in MPEC 2019-E95 -- 2007 FE
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-E95 -- 2019 EC1
W88!program code "!" (10) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2019-E95 -- 2006 SK134
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2019-E93 & 2019-E95 -- 2019 ET1, 2019 EA2, 2019 DR, 2019 BT2, 2018 QT, 2016 GG216
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2019-E94 -- 2019 EF2
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2019-E95 -- 2019 ET1, 2019 EQ
K41Vegaquattro Obs. in Italy, 2 in MPECs 2019-E94 & 2019-E95 -- 2019 EF2, 2019 CD5
L01Visnjan Obs., 1 in MPEC 2019-E94 -- 2019 EF2
C51WISE in Earth polar orbit, 1 in MPEC 2019-E95 -- 2002 KJ4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 March '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 EA2JPL Sentry16502070-2118229.0853148e-05-4.92-5.100JPL: Computed at 07:56 today Pacific time based on 30 observations spanning 4.9822 days (2019-Mar-09.49609 to 2019-Mar-14.47826). Diameter approximately 0.022 km. from weighted mean H=25.90.
NEODyS16502065-2118491.53e-03-3.73-3.73-NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2019-03-09.497 to 2019-03-14.479."
2019 ET1JPL Sentry16502106-211521.1066e-07-7.35-7.560JPL: Computed at 07:43 today Pacific time based on 28 observations spanning 8.1369 days (2019-Mar-06.30025 to 2019-Mar-14.43711). Diameter approximately 0.034 km. from weighted mean H=25.00.
NEODyS16502106-211525.0e-06-5.69-5.740NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2019-03-06.301 to 2019-03-14.438."

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 March '19

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

1850Generated Traffic Report
1650Noted that JPL Sentry has updated its 2019 EA2 risk assessment - see above
Noted that NEODyS has updated its 2019 EA2 risk assessment - see above
Noted that JPL Sentry has updated its 2019 ET1 risk assessment - see above
Noted that NEODyS has updated its 2019 ET1 risk assessment - see above
Grabbed MPEC 2019-E93 - 2016 GG216 - see above
Grabbed MPEC 2019-E94 - 2019 EF2 - see above
Grabbed MPEC 2019-E95 - Daily Orbit Update - see above