Contents  on 15 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 15 March '19

Seven objects reported inside ten LD

There are seven asteroidal objects reported inside ten lunar distances (LD) of Earth today. Nearest are risk-listed 2019 DJ1, headed away from 4.40 to 4.80 LD, and 2019 EF2, outbound from 4.50 to 5.04 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  7.1 from 8.3 LD March 13 - 30 EPU +/- 9 mins.*, intruder, NHATS target, risk
2.48 LD March 11 2019 EL2 18 m  5.25 to 6.60 LD March 5 - 18 NEW - MPEC
4.04 LD March 12 2019 DJ1 15 m  4.40 to 4.80 LD March 2 - 23 NHATS target, risk
4.48 LD yesterday 2019 EF2 24 m  4.50 to 5.04 LD March 10 - 19 NHATS target
7.7   LD March 13* 2012 VZ19 26 m  8.3 to 9.2 LD March 9 - 16 EPU +/- 3.65 days*, NHATS target
8.52 LD March 18 2019 DH1 20 m  8.96 from 9.36 LD March 13 - 23 NHATS target
9.02 LD tomorrow 2019 ES 30 m  9.03 from 9.25 LD March 13 - 19 NHATS target
* EPU = Earth passage uncertainty

This report was generated at 2110 UTC with the discoveries of approaching 2019 EK2 (MPEC) and outbound 2019 EL2 (MPEC). Today's DOU MPEC has follow-up for departed risk-listed objects 2019 DS1 and 2019 DP, along with astrometry from their respective discovery years for 2018 MG7, 2013 QR1 (14.93 days added to 9.36-day observing arc), and 2012 XJ134.

Approaching - sorted by 10-LD bubble entry date
4.7   LD March 23* 2019 EK2 10 m  14.8 from 16.6 LD March 18 - 28 NEW, EPU +/- 25 mins.* - MPEC
9.69 LD March 27 2019 EN 203 m  39.11 from 42.47 LD March 26 - 27
3.9   LD April 4* 2016 GE1 16 m  45.2 from 47.5 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 15 March '19

The MPC's NEO Confirmation Page has 22 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 22 objects listed. Of these, sixteen were "one nighters." So far The Tracking News has counted a total of 26 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 15 March '19

Minor Planet Electronic Circulars

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


MPEC 2019-E99 - "19:03 UT" - 2019 EL2


MPEC 2019-E98 - "18:55 UT" - 2019 EK2


<< DOU on 15 Mar. '19 >>  MPEC 2019-E97 - "12:11 UT" - Daily Orbit Update


MPEC 2019-E96 - "10:22 UT" - Comet P/2019 A4 (Panstarrs)

Observers  on 15 March '19

Eighteen observers appear in today's MPECs.

CodeObserver / observatory
C97Al-Fulaij Obs., 2 in MPEC 2019-E97 -- 2014 QR295, 18736
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPEC 2019-E97 -- 2019 EO, 2019 DX1, 2019 DS1, 2019 AH13, 2018 YS, 2016 FA4, 2000 WJ10
T08ATLAS Mauna Loa in Hawaii, 2 in MPECs 2019-E97 & 2019-E99 -- 2019 EL2, 483656
703Catalina Sky Survey in Arizona, 1 in MPEC 2019-E99 -- 2019 EL2
511Haute Provence Obs. in Germany, 1 in MPEC 2019-E99 -- 2019 EL2
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 8 in MPEC 2019-E97 -- 2019 DS1, 2019 DP, 2019 CC5, 2019 BP1, 2019 BC1, 2018 QT, 2010 JV34, 2007 AA9
W87LCO Cerro Tololo C in Chile, 1 in MPEC 2019-E97 -- 2019 CM4
568Mauna Kea in Hawaii, 1 in MPEC 2019-E98 -- 2019 EK2
V01Mountainville Obs. in Utah, 1 in MPEC 2019-E99 -- 2019 EL2
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2019-E96 -- P/2019 A4
F51Pan-STARRS 1 (PS1) in Hawaii, 27 in MPEC 2019-E97 -- 2018 WE3, 2018 RJ7, 2018 PK24, 2018 PH22, 2018 MW6, 2018 MG7, 2017 XL2, 2017 DN109, 2017 BF3, 2016 XW17, 2016 GX221, 2016 FC13, 2016 EL56, 2015 XK261, 2015 RA36, 2015 PU228, 2014 WD7, 2014 HE124, 2014 CM13, 2014 BX2, 2013 QR1, 2013 PV13, 2013 JR28, 2012 XJ134, 2010 UG7, 2010 LK34, 2009 XT6
C95SATINO-1 in France, 2 in MPECs 2019-E97 & 2019-E99 -- 2019 EL2, 2009 BL71
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-E97 -- 2019 EC1
W88!program code "!" (10) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2019-E97 -- 2006 SK134
291Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2019-E97 & 2019-E98 -- 2019 ET1, 2019 EK2, 2019 DS, 2015 FQ117
461SZTE Asteroid Program in Hungary, 1 in MPEC 2019-E96 -- P/2019 A4
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2019-E97 -- 2019 AN5, 2018 YJ2
L01Visnjan Obs., 2 in MPECs 2019-E98 & 2019-E99 -- 2019 EL2, 2019 EK2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 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 EA2NEODyS16002065-2118491.53e-03-3.73-3.730NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2019-03-09.497 to 2019-03-14.479."
2019 ET1JPL Sentry16002106-210611.796e-09-9.12-9.120JPL: Computed at 08:30 today Pacific time based on 31 observations spanning 9.0027 days (2019-Mar-06.30025 to 2019-Mar-15.30297). Diameter approximately 0.034 km. from weighted mean H=25.00.
NEODyS16002106-211521.46e-06-6.23-6.250NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2019-03-06.301 to 2019-03-15.304."
2019 DS1JPL Sentry16002069-2114280.00016887396-4.24-4.520JPL: Computed at 08:38 today Pacific time based on 89 observations spanning 15.028 days (2019-Feb-28.38268 to 2019-Mar-15.411). Diameter approximately 0.025 km. from weighted mean H=25.66.
NEODyS16002069-2115451.42e-04-4.33-4.590NEODyS: "Based on 89 optical observations (of which 0 are rejected as outliers) from 2019-02-28.383 to 2019-03-15.412."
2019 DG1NEODyS16002098-211841.5e-06-7.07-7.220NEODyS: "Based on 57 optical observations (of which 1 are rejected as outliers) from 2019-02-28.235 to 2019-03-09.628."
2019 DPJPL Sentry16002060-2118113.853502e-06-5.74-6.020JPL: Computed at 08:40 today Pacific time based on 188 observations spanning 16.850 days (2019-Feb-26.440595 to 2019-Mar-15.29068). Diameter approximately 0.034 km. from weighted mean H=24.97.
NEODyS16002048-2118305.8e-06-5.55-5.80NEODyS: "Based on 188 optical observations (of which 0 are rejected as outliers) from 2019-02-26.441 to 2019-03-15.291."
2019 CM4NEODyS1600211528.79e-10-8.40-8.550NEODyS: "Based on 152 optical observations (of which 0 are rejected as outliers) from 2019-02-08.398 to 2019-03-14.351."
2008 EM68JPL Sentry16002019-211610971.08647531e-05-5.57-6.250JPL: 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.

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 15 March '19

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

2110Generated Traffic Report
1908Grabbed MPEC 2019-E98 - 2019 EK2 - see above
Grabbed MPEC 2019-E99 - 2019 EL2 - see above
1600Noted that JPL Sentry has updated its 2008 EM68 risk assessment - see above
Noted that NEODyS has updated its 2019 CM4 risk assessment - see above
Noted that NEODyS has updated its 2019 DG1 risk assessment - see above
Noted that JPL Sentry has updated its 2019 DP risk assessment - see above
Noted that NEODyS has updated its 2019 DP risk assessment - see above
Noted that JPL Sentry has updated its 2019 DS1 risk assessment - see above
Noted that NEODyS has updated its 2019 DS1 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-E96 - Comet P/2019 A4 (Panstarrs) - see above
Grabbed MPEC 2019-E97 - Daily Orbit Update - see above