Contents  on 12 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 12 March '19

Six objects reported inside ten LD

There are six asteroids reported to be less than ten lunar distances (LD) from our home planet today. Nearest is 2019 EW1, which travels outward from 2.85 to 5.19 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
1.59 LD yesterday 2019 EW1 14 m  2.85 to 5.19 LD March 7 - 14
2.04 LD March 8 2019 EU 25 m  9.04 to 11.34 LD March 4 - today exits ten LD
2.72 LD March 6 2019 EU1 26 m  9.31 to 10.82 LD Feb. 28 - today exits ten LD
6.46 LD March 8 2019 EF1 20 m  7.66 to 8.48 LD March 3 - 14 NHATS target
7.59 LD yesterday 2019 DH 39 m  7.59 to 8.04 LD March 9 - 14 DOU
7.7   LD tomorrow* 2012 VZ19 26 m  7.7 from 8.0 LD March 9 - 16 EPU +/- 3.65 days*, NHATS target
* EPU = Earth passage uncertainty

This report was generated at 1820 UTC with follow-up in today's DOU MPEC for approaching 2019 EN, outbound 2019 DH, and departed objects 2019 EH, 2015 EG, and risk-listed 2019 ED1.

Approaching - sorted by 10-LD bubble entry date
0.8   LD March 22* 2019 EA2 22 m  10.5 from 11.7 LD tomorrow - March 30 EPU +/- 3.73 hours*, intruder, NHATS target, risk
9.02 LD March 16 2019 ES 30 m  10.41 from 11.28 LD tomorrow - March 19 NHATS target
8.52 LD March 18 2019 DH1 20 m  10.48 from 11.18 LD tomorrow - March 23 NHATS target
9.69 LD March 27 2019 EN 203 m  49.29 from 52.73 LD March 26 - 27 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 12 March '19

The MPC's NEO Confirmation Page has 14 listings

When last checked at 2333 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had fourteen objects listed. Of these, nine were "one nighters." So far The Tracking News has counted a total of 27 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 12 March '19

Minor Planet Electronic Circulars

As of last check at 2333 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2019-E91 - "21:51 UT" - 2016 KA1


MPEC 2019-E90 - "21:47 UT" - 2016 FE12


MPEC 2019-E89 - "21:44 UT" - 2016 EL56


MPEC 2019-E88 - "21:21 UT" - 2019 EC2


MPEC 2019-E87 - "21:09 UT" - 2019 ED2


<< DOU on 12 Mar. '19 >>  MPEC 2019-E86 - "13:05 UT" - Daily Orbit Update

Observers  on 12 March '19

A total of 31 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2019-E88 -- 2019 EC2
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2019-E86 -- 2017 FE101
T08ATLAS Mauna Loa in Hawaii, 2 in MPECs 2019-E87 & 2019-E88 -- 2019 ED2, 2019 EC2
160Castelmartini Obs. in Italy, 9 in MPEC 2019-E86 -- 2013 LH16, 2009 SV17, 90403, 512245, 382825, 18736, 7358, 6178, 5131
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 18 in MPECs 2019-E86, 2019-E87, 2019-E88, 2019-E89, 2019-E90 & 2019-E91 -- 2019 EH, 2019 EG, 2019 ED2, 2019 ED1, 2019 EC2, 2019 DZ, 2019 DP1, 2019 CT, 2019 CC3, 2019 BH5, 2018 XG5, 2018 UZ, 2018 RV5, 2016 RR33, 2016 KA1, 2016 FE12, 2016 EL56, 2016 ED157
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPECs 2019-E87 & 2019-E88 -- 2019 ED2, 2019 EC2
J95Great Shefford Obs. in England, 1 in MPEC 2019-E88 -- 2019 EC2
Q62iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2019-E88 -- 2019 EC2
P93JAXA Space Tracking & Communications Center (JAXA STCC) in Japan, 3 in MPECs 2019-E86 & 2019-E88 -- 2019 EC2, 154652, 143643
585Kiev Comet Station in Ukraine, 1 in MPEC 2019-E88 -- 2019 EC2
W85LCO Cerro Tololo A in Chile, 1 in MPEC 2019-E86 -- 2019 EN
W86LCO Cerro Tololo B in Chile, 1 in MPEC 2019-E86 -- 2019 EN
W87LCO Cerro Tololo C in Chile, 1 in MPEC 2019-E86 -- 2019 EN
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2019-E86 -- 2015 EG
Z80Northolt Branch Obs. in England, 2 in MPEC 2019-E86 -- 2019 CL2, 2019 CD5
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2019-E86 -- 2007 CK26
K63Pascoli Obs. in Italy, 1 in MPEC 2019-E88 -- 2019 EC2
323Perth Obs. in Western Australia, 2 in MPEC 2019-E86 -- 18736, 433
D29Purple Mtn. Obs. Xuyi Station in China, 3 in MPEC 2019-E86 -- 2017 ER22, 2008 GP20, 38086
L18QOS Obs., 9 in MPEC 2019-E86 -- 2019 DN, 2019 DH, 2019 CM4, 2019 CL2, 2019 CD5, 2019 AP3, 2016 EO84, 2015 EG, 2014 QR295
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2019-E88 -- 2019 EC2
C95SATINO-1 in France, 2 in MPECs 2019-E86 & 2019-E88 -- 2019 EC2, 2006 OH15
204Schiaparelli Obs. in Italy, 1 in MPEC 2019-E88 -- 2019 EC2
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-E86 -- 2009 BL71
G40,program code "," (21) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-E86 -- 2019 DN
587Sormano Obs. in Italy, 1 in MPEC 2019-E88 -- 2019 EC2
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2019-E88 -- 2019 EC2
I52Steward Obs. Mt. Lemmon Station in Arizona, 1 in MPEC 2019-E88 -- 2019 EC2
C57TESS in Earth orbit, 2 in MPEC 2019-E86 -- 250697, 4953
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2019-E86 -- 1998 FF14, 455184
L01Visnjan Obs., 1 in MPEC 2019-E88 -- 2019 EC2
C51WISE in Earth polar orbit, 3 in MPEC 2019-E86 -- 2002 KJ4, 394130, 234145
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 March '19

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2333 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 ED1JPL Sentry16302070-2103161.79741e-05-6.16-6.810JPL: Computed at 08:39 today Pacific time based on 41 observations spanning 5.0470 days (2019-Mar-05.23495 to 2019-Mar-10.28191). Diameter approximately 0.011 km. from weighted mean H=27.51.
NEODyS16302070-2114291.53e-05-6.24-6.780NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2019-03-05.236 to 2019-03-10.283."
2019 CM4NEODyS16302115-211735.31e-09-7.62-7.660NEODyS: "Based on 146 optical observations (of which 0 are rejected as outliers) from 2019-02-08.398 to 2019-03-10.157."
2008 EM68JPL Sentry16302019-211610991.09564001e-05-5.56-6.250JPL: Computed at 00:27 April 7th of 2017 Pacific time based on 12 observations spanning .11019 days (2008-Mar-08.25164 to 2008-Mar-08.36183). Diameter approximately 0.010 km. from weighted mean H=27.72.
NEODyS16302019-21154361.93e-06-6.61-7.310NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2008-03-08.252 to 2008-03-08.363."

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 12 March '19

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

2202Grabbed MPEC 2019-E87 - 2019 ED2 - see above
Grabbed MPEC 2019-E88 - 2019 EC2 - see above
Grabbed MPEC 2019-E89 - 2016 EL56 - see above
Grabbed MPEC 2019-E90 - 2016 FE12 - see above
Grabbed MPEC 2019-E91 - 2016 KA1 - see above
1820Generated Traffic Report
1630Noted that JPL Sentry has updated its 2008 EM68 risk assessment - see above
Noted that NEODyS has updated its 2008 EM68 risk assessment - see above
Noted that NEODyS has updated its 2019 CM4 risk assessment - see above
Noted that JPL Sentry has updated its 2019 ED1 risk assessment - see above
Noted that NEODyS has updated its 2019 ED1 risk assessment - see above
Grabbed MPEC 2019-E86 - Daily Orbit Update - see above