Contents  on 17 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 17 March '19

Eight objects reported inside ten LD

Eight Solar-System small bodies are known to be within ten lunar distances (LD) of Earth today. Nearest are two risk-listed objects. Intruder 2019 EA2 is inbound from 5.96 to 4.82 LD and 2019 DJ1 is outbound from 5.30 to 5.89 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
0.80 LD March 22 2019 EA2 23 m  4.82 from 5.96 LD March 13 - 30 intruder, NHATS target, risk - DOU
0.86 LD March 13 2019 EN2 10 m  6.66 to 8.83 LD March 9 - 18 NEW, intruder - MPEC
2.48 LD March 11 2019 EL2 18 m  8.00 to 9.43 LD March 5 - 18 NHATS target
4.04 LD March 12 2019 DJ1 15 m  5.30 to 5.89 LD March 2 - 23 NHATS target, risk
4.48 LD March 14 2019 EF2 24 m  6.14 to 7.56 LD March 10 - 19 NHATS target
7.61 LD March 20 2019 ES2 23 m  8.51 from 9.31 LD yesterday - March 24 NEW - MPEC
8.52 LD tomorrow 2019 DH1 20 m  8.54 from 8.68 LD March 13 - 23 NHATS target
9.01 LD yesterday 2019 ES 30 m  9.08 to 9.39 LD March 13 - 19 NHATS target - DOU

This report was generated at 2054 UTC with four discoveries: approaching 2019 ER2 (MPEC), inbound 2019 ES2 (MPEC), outbound intruder 2019 EN2 (MPEC), and departed 2019 EO2 (MPEC), which went by us at 7.07 LD on March 12th. Today's DOU MPEC has follow-up for approaching 2019 EK2 and 2019 EN, inbound risk-listed intruder 2019 EA2, outbound 2019 ES, four departed objects 2019 EU1, 2019 EM1, and including risk-listed 2019 ED and 2019 DG1, and distant 68216 2001 CV26, plus astrometry from December for risk-listed 2018 VC.

Approaching - sorted by 10-LD bubble entry date
4.7   LD March 23* 2019 EK2 10 m  11.4 from 13.1 LD tomorrow - March 28 EPU +/- 10 mins.*, NHATS target - DOU
8.88 LD March 25 2019 ER2 22 m  11.81 from 12.56 LD March 20 - 29 NEW - MPEC
9.69 LD March 27 2019 EN 200 m  32.47 from 35.77 LD March 26 - 27 DOU
3.9   LD April 4* 2016 GE1 16 m  40.7 from 42.9 LD March 31 - April 8 EPU +/- 4.90 days*
* EPU = Earth passage uncertainty



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 that has come within ten LD since A/CC began these traffic reports (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 17 March '19

The MPC's NEO Confirmation Page has 23 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 23 objects listed. Of these, thirteen were "one nighters." So far The Tracking News has counted a total of 32 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 17 March '19

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been fourteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2019-F18 - "19:40 UT" - 2019 EQ2


MPEC 2019-F17 - "18:35 UT" - 2019 ET2


MPEC 2019-F16 - "18:30 UT" - 2019 ES2


MPEC 2019-F15 - "18:24 UT" - 2019 ER2


MPEC 2019-F14 - "17:35 UT" - 2018 LP2


MPEC 2019-F13 - "17:31 UT" - 2018 BO1


MPEC 2019-F12 - "17:23 UT" - 2018 NP1


MPEC 2019-F11 - "17:19 UT" - 2018 JP1


MPEC 2019-F10 - "17:15 UT" - 2016 JE


MPEC 2019-F09 - "17:11 UT" - 2014 QO434


<< DOU on 17 Mar. '19 >>  MPEC 2019-F08 - "12:14 UT" - Daily Orbit Update


MPEC 2019-F07 - "11:28 UT" - 2019 EO2


MPEC 2019-F06 - "11:21 UT" - 2019 EP2


MPEC 2019-F05 - "11:10 UT" - 2019 EN2

Observers  on 17 March '19

A total of 34 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 13 in MPECs 2019-F05, 2019-F06, 2019-F07, 2019-F08, 2019-F15, 2019-F16, 2019-F17 & 2019-F18 -- 2019 ET2, 2019 ES2, 2019 ER2, 2019 EQ2, 2019 EP2, 2019 EO2, 2019 EN2, 2019 EA2, 2019 DO1, 2019 CV, 2015 KN120, 2010 PM58, 159467
T08ATLAS Mauna Loa in Hawaii, 2 in MPECs 2019-F06 & 2019-F07 -- 2019 EP2, 2019 EO2
I47Auger Obs. in Argentina, 1 in MPEC 2019-F07 -- 2019 EO2
B88Bigmuskie Obs. in Italy, 1 in MPEC 2019-F08 -- 68216
703Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2019-F07, 2019-F17 & 2019-F18 -- 2019 ET2, 2019 EQ2, 2019 EO2
595Farra d'Isonzo Obs. in Italy, 3 in MPECs 2019-F05, 2019-F06 & 2019-F07 -- 2019 EP2, 2019 EO2, 2019 EN2
X31Galilei Obs., 1 in MPEC 2019-F07 -- 2019 EO2
E89Geyserland Obs. in New Zealand, 2 in MPEC 2019-F08 -- 3122, 1917
J95Great Shefford Obs. in England, 8 in MPECs 2019-F05, 2019-F06, 2019-F08, 2019-F16, 2019-F17 & 2019-F18 -- 2019 ET2, 2019 ET1, 2019 ES2, 2019 ES, 2019 EQ2, 2019 EP2, 2019 EN2, 2019 EA2
511Haute Provence Obs. in Germany, 3 in MPECs 2019-F05, 2019-F06 & 2019-F07 -- 2019 EP2, 2019 EO2, 2019 EN2
I89'Steven M. Tilley in Louisiana via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2019-F08 -- 2019 EA2
Q67JBL Obs., 1 in MPEC 2019-F07 -- 2019 EO2
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 5 in MPEC 2019-F08 -- 2019 ED, 2019 EA2, 2019 DG1, 2019 CH1, 2019 CE4
W86LCO Cerro Tololo B in Chile, 1 in MPEC 2019-F08 -- 2008 HS3
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2019-F08 -- 2019 EA2
Z22MASTER IAC Obs. in the Canary Islands, 3 in MPEC 2019-F08 -- 163000, 136635, 1036
V01Mountainville Obs. in Utah, 5 in MPECs 2019-F05, 2019-F06, 2019-F08 & 2019-F18 -- 2019 EQ2, 2019 EP2, 2019 EN2, 2019 CL2, 2019 CD5
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2019-F15 & 2019-F16 -- 2019 ES2, 2019 ER2
F51Pan-STARRS 1 (PS1) in Hawaii, 39 in MPECs 2019-F08, 2019-F09, 2019-F10, 2019-F11, 2019-F12, 2019-F13 & 2019-F14 -- 2018 NP1, 2018 NC, 2018 MR5, 2018 LP2, 2018 LL2, 2018 JP1, 2018 DZ1, 2018 CW13, 2018 BT6, 2018 BO1, 2018 AD4, 2017 WJ2, 2017 VV, 2017 TK1, 2017 PR25, 2017 GP6, 2017 GM4, 2017 ER13, 2016 TZ17, 2016 SJ1, 2016 OK1, 2016 LN1, 2016 JE, 2016 EF28, 2016 CC30, 2015 XU168, 2015 MW53, 2015 KB19, 2015 FL, 2014 QO434, 2013 JN7, 2013 JM14, 2012 VO6, 2012 VL6, 2011 YE6, 2011 HP, 2010 FC81, 2008 HS3, 2001 FR128
323Perth Obs. in Western Australia, 1 in MPEC 2019-F08 -- 2019 EC2
L04ROASTERR-1 in Romania, 1 in MPEC 2019-F07 -- 2019 EO2
H36Sandlot Obs. in Kansas, 3 in MPECs 2019-F06, 2019-F15 & 2019-F18 -- 2019 ER2, 2019 EQ2, 2019 EP2
C95SATINO-1 in France, 5 in MPECs 2019-F05, 2019-F06, 2019-F07, 2019-F08 & 2019-F18 -- 2019 EQ2, 2019 EP2, 2019 EO2, 2019 EN2, 2006 SK134
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-F08 -- 2019 EA2
G40'program code "'" (16) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-F06 -- 2019 EP2
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-F08 -- 2019 CH
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-F07 -- 2019 EO2
587Sormano Obs. in Italy, 2 in MPECs 2019-F05 & 2019-F07 -- 2019 EO2, 2019 EN2
691Spacewatch 0.9m telescope in Arizona, 10 in MPEC 2019-F08 -- 2019 EN, 2019 ED2, 2019 CW5, 2019 CN4, 2018 TD4, 2017 EV2, 2015 VY150, 2014 HS178, 2014 EQ49, 2012 CP2
291Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2019-F08 -- 2019 DN, 2019 CS, 2019 BJ2, 2017 KU34, 2014 QX266, 1998 FF14
W34Squirrel Valley Obs. in North Carolina, 2 in MPECs 2019-F06 & 2019-F08 -- 2019 EP2, 267759
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2019-F06 & 2019-F18 -- 2019 EQ2, 2019 EP2
I52Steward Obs. Mt. Lemmon Station in Arizona, 45 in MPECs 2019-F05, 2019-F06, 2019-F07, 2019-F08, 2019-F15, 2019-F16, 2019-F17 & 2019-F18 -- 2019 EU1, 2019 ET2, 2019 ET1, 2019 ES2, 2019 ES1, 2019 ER2, 2019 EQ2, 2019 EQ1, 2019 EP2, 2019 EO2, 2019 EN2, 2019 EN, 2019 EM1, 2019 EK2, 2019 EJ, 2019 EC2, 2019 EC1, 2019 EA2, 2019 DS, 2019 DR1, 2019 DP1, 2019 DN, 2019 CW5, 2019 CS, 2019 CO5, 2019 CN4, 2019 CH, 2019 CD5, 2019 CD2, 2019 BP4, 2019 BJ5, 2019 BJ2, 2019 BF4, 2019 AW11, 2018 YB1, 2018 YA3, 2018 XY2, 2018 XT2, 2018 XC2, 2018 VW6, 2018 TD4, 2018 RX, 2016 EL158, 2015 TT351, 2015 SA17
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2019-F08 -- 2018 VC
L01Visnjan Obs., 7 in MPECs 2019-F05, 2019-F06, 2019-F07, 2019-F15, 2019-F16, 2019-F17 & 2019-F18 -- 2019 ET2, 2019 ES2, 2019 ER2, 2019 EQ2, 2019 EP2, 2019 EO2, 2019 EN2
718Wiggins Obs. in Utah, 1 in MPEC 2019-F08 -- 2019 CD5
I41Zwicky Transient Facility (ZTF) in southern California, 2 in MPECs 2019-F05 & 2019-F08 -- 2019 EN2, 2014 QR295
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 March '19

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2359 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 Sentry17202097-211676.667123e-05-5.05-5.130JPL: Computed at 08:52 today Pacific time based on 69 observations spanning 7.8965 days (2019-Mar-09.49609 to 2019-Mar-17.39261). Diameter approximately 0.023 km. from weighted mean H=25.85.
NEODyS17202057-2118161.51e-03-3.71-3.710NEODyS: "Based on 69 optical observations (of which 0 are rejected as outliers) from 2019-03-09.497 to 2019-03-17.393."
2019 ET1JPL Sentry1720R E M O V E DJPL: Risk listing removed at 1547 UTC today
NEODyS1720211511.07e-09-9.37-9.370NEODyS: "Based on 38 optical observations (of which 1 are rejected as outliers) from 2019-03-06.301 to 2019-03-17.305."
2019 EDNEODyS1720210617.41e-08-8.52-8.520NEODyS: "Based on 65 optical observations (of which 0 are rejected as outliers) from 2019-03-01.196 to 2019-03-17.245."
2019 DG1JPL Sentry1720R E M O V E DJPL: Risk listing removed at 1531 UTC today
NEODyS17202113-211831.92e-06-6.96-6.990NEODyS: "Based on 59 optical observations (of which 1 are rejected as outliers) from 2019-02-28.235 to 2019-03-16.501."
2018 VCJPL Sentry17202109-211555.44606e-06-6.36-6.450JPL: Computed at 08:24 today Pacific time based on 143 observations spanning 36.008 days (2018-Nov-01.24873 to 2018-Dec-07.257089). Diameter approximately 0.019 km. from weighted mean H=26.29.
NEODyS17202108-2118151.36e-05-5.97-6.220NEODyS: "Based on 143 optical observations (of which 0 are rejected as outliers) from 2018-11-01.250 to 2018-12-07.258."

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 17 March '19

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

2054Generated Traffic Report
2003Grabbed MPEC 2019-F18 - 2019 EQ2 - see above
1900Grabbed MPEC 2019-F17 - 2019 ET2 - see above
1832Grabbed MPEC 2019-F15 - 2019 ER2 - see above
Grabbed MPEC 2019-F16 - 2019 ES2 - see above
1800Grabbed MPEC 2019-F11 - 2018 JP1 - see above
Grabbed MPEC 2019-F12 - 2018 NP1 - see above
Grabbed MPEC 2019-F13 - 2018 BO1 - see above
Grabbed MPEC 2019-F14 - 2018 LP2 - see above
1720Noted that JPL Sentry has updated its 2018 VC risk assessment - see above
Noted that NEODyS has updated its 2018 VC risk assessment - see above
Noted that JPL Sentry has removed 2019 DG1 as an impact risk - see above
Noted that NEODyS has updated its 2019 DG1 risk assessment - see above
Noted 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 NEODyS has updated its 2019 ED risk assessment - see above
Noted that JPL Sentry has removed 2019 ET1 as an impact risk - see above
Noted that NEODyS has updated its 2019 ET1 risk assessment - see above
Grabbed MPEC 2019-F05 - 2019 EN2 - see above
Grabbed MPEC 2019-F06 - 2019 EP2 - see above
Grabbed MPEC 2019-F07 - 2019 EO2 - see above
Grabbed MPEC 2019-F08 - Daily Orbit Update - see above
Grabbed MPEC 2019-F09 - 2014 QO434 - see above
Grabbed MPEC 2019-F10 - 2016 JE - see above