Contents  on 16 April '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 16 April '19

Eight objects reported inside ten LD

Eight asteroids are reported within ten lunar distances (LD) of our planet today. Nearest is risk-listed intruder 2019 GC6, which enters Earth's SOI as it wanders inward from 2.82 to 1.66 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
0.57 LD April 18 2019 GC6 17 m  1.66 from 2.82 LD April 10 - 26 intruder, NHATS target, enters Earth SOI, risk - DOU
1.70 LD April 11 2019 GV5 5 m  4.07 to 4.86 LD March 31 - April 23 NHATS target
1.72 LD April 13 2019 GN 14 m  7.95 to 10.57 LD April 9 - 16 exits ten LD
3.39 LD today 2019 GW20 11 m  3.39 LD April 13 - 19 Earth closest at 1026 UTC
3.86 LD April 11 2019 GE1 12 m  7.15 to 8.42 LD April 5 - 18 NHATS target
4.04 LD April 18 2019 FN2 62 m  5.03 from 6.23 LD April 13 - 24 NHATS target - DOU
4.69 LD April 27 2019 GF1 10 m  6.45 from 6.75 LD April 7 - May 19 NHATS target
5.48 LD April 11 2019 GP19 16 m  7.04 to 7.65 LD April 1 - 20 NHATS target - DOU

This report was generated at 1920 UTC with follow-up in today's DOU MPEC for approaching 2019 GM4, inbound objects 2019 FN2 and risk-listed intruder 2019 GC6, outbound 2019 GP19, departed objects 2019 GE, 2019 FY1, and risk-listed 2019 FT1, and distant objects 2012 XO134 and 68216 2001 CV26.

Approaching - sorted by 10-LD bubble entry date
9.09 LD April 23 2019 GM4 68 m  15.21 from 16.78 LD April 21 - 25 DOU
7.2   LD April 28* 2019 GX5 24 m  28.3 from 30.7 LD April 25 - May 1 EPU +/- 15 mins.*
6.1   LD May 17* 2019 GT1 35 m  26.6 from 27.4 LD May 8 - 26 EPU +/- 43 mins.*, NHATS target
* 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 objects that have come within ten LD since A/CC began this traffic reporting (2007) but are not currently 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 16 April '19

The MPC's NEO Confirmation Page has 42 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 42 objects listed. Of these, 20 were "one nighters."

New MPECs  on 16 April '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.


<< DOU on 16 Apr. '19 >>  MPEC 2019-H04 - "12:07 UT" - Daily Orbit Update


MPEC 2019-H03 - "02:43 UT" - 2018 TT1


MPEC 2019-H02 - "02:36 UT" - 2019 GT2


MPEC 2019-H01 - "02:31 UT" - 2016 VE2

Observers  on 16 April '19

A total of 41 observers appear in today's MPECs.

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 2 in MPEC 2019-H04 -- 163243, 3752
C97Al-Fulaij Obs., 12 in MPEC 2019-H04 -- 2019 GL4, 2019 CH, 2019 AP3, 381906, 367684, 144898, 137170, 12538, 7889, 5693, 3199, 1620
H21Astronomical Research Obs. Westfield in Illinois, 6 in MPEC 2019-H04 -- 2019 GT3, 2019 EU2, 2018 XU2, 2008 EY68, 341816, 276732
T05ATLAS Haleakala in Hawaii, 8 in MPEC 2019-H04 -- 2019 FN2, 441825, 163693, 141525, 6178, 5879, 5332, 3103
T08ATLAS Mauna Loa in Hawaii, 10 in MPEC 2019-H04 -- 2019 GM4, 2019 GC6, 2019 FY, 2019 AP3, 2014 HD177, 2012 XO134, 356285, 138325, 5189, 1685
K46Bamberg Obs. in Germany, 1 in MPEC 2019-H04 -- 1036
B88Bigmuskie Obs. in Italy, 1 in MPEC 2019-H04 -- 453778
K76BSA Obs., 1 in MPEC 2019-H04 -- 5189
703Catalina Sky Survey (CSS) in Arizona, 25 in MPEC 2019-H04 -- 2019 GD, 2019 GC6, 2019 FP2, 2019 EC2, 2018 TD4, 2016 GW221, 2014 QR295, 2012 CP2, 2009 DL1, 2001 TO48, 68216, 40267, 356285, 168378, 163696, 154988, 154035, 141525, 139622, 138325, 7480, 5879, 5332, 5189, 3103
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 13 in MPECs 2019-H03 & 2019-H04 -- 2019 GO, 2019 GN19, 2019 GE4, 2019 FA1, 2019 CE4, 2019 AV2, 2018 WJ1, 2018 TT1, 2018 PM28, 2015 MN66, 2014 QO296, 2013 UG9, 2009 OB3
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 20 in MPECs 2019-H01 & 2019-H04 -- 2019 GZ3, 2019 GY19, 2019 GT3, 2019 GR1, 2019 GO3, 2019 GN3, 2019 GM5, 2019 GL5, 2019 GG3, 2019 GE4, 2019 GE20, 2019 GC20, 2019 GC1, 2019 GB4, 2019 FV2, 2019 EU2, 2019 EP2, 2018 PM28, 2016 VE2, 2016 ON
Z99Clixby Obs. in England, 1 in MPEC 2019-H04 -- 9162
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2019-H04 -- 2019 GE
006Fabra Obs. in Spain, 3 in MPEC 2019-H04 -- 88254, 18736, 433
E89Geyserland Obs. in New Zealand, 2 in MPEC 2019-H04 -- 21088, 433
Q628N. Falla in England via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2019-H04 -- 141484
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 4 in MPECs 2019-H02 & 2019-H04 -- 2019 GT2, 2019 FY1, 2018 VX8, 2016 JJ24
246KLENOT in the Czech Republic, 1 in MPEC 2019-H04 -- 2016 GW221
Z43Landehen Obs., 1 in MPEC 2019-H04 -- 2019 GL4
W87LCO Cerro Tololo C in Chile, 1 in MPEC 2019-H04 -- 2019 GC6
K30Luscherz Obs. in Switzerland, 1 in MPEC 2019-H04 -- 2014 LJ21
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2019-H04 -- 1036
G96Mt. Lemmon Survey (MLS) in Arizona, 13 in MPEC 2019-H04 -- 2019 FH1, 2019 FA1, 2016 FF15, 2015 TT351, 2001 TO48, 1990 UP, 366470, 257838, 24761, 153814, 138325, 7480, 6050
K74Muensterschwarzach Obs. in Germany, 1 in MPEC 2019-H04 -- 2019 FN2
0895N.V. Maigurova via Nikolaev Obs. in Ukraine, 1 in MPEC 2019-H04 -- 2006 SK134
Z80Northolt Branch Obs. in England, 2 in MPEC 2019-H04 -- 2019 FY, 2014 LJ21
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2019-H04 -- 4581
F51Pan-STARRS 1 (PS1) in Hawaii, 11 in MPECs 2019-H02, 2019-H03 & 2019-H04 -- 2019 GZ6, 2019 GT2, 2019 FH1, 2018 TT1, 2018 TD4, 2015 QT9, 2015 FV118, 361538, 350523, 267759, 163696
K63Pascoli Obs. in Italy, 1 in MPEC 2019-H04 -- 144898
122Pises Obs. in France, 3 in MPEC 2019-H04 -- 2019 AP3, 5879, 5332
C95SATINO-1 in France, 2 in MPEC 2019-H04 -- 2019 BJ5, 2019 BF4
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-H04 -- 2019 FN2
Y00SONEAR in Brazil, 1 in MPEC 2019-H04 -- 18736
691Spacewatch 0.9m telescope in Arizona, 10 in MPEC 2019-H04 -- 2019 GP3, 2019 GJ5, 2019 GG1, 2019 GD3, 2019 ED2, 2018 XG5, 2018 VZ9, 2016 FF15, 2015 JD1, 2015 FV118
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2019-H04 -- 2019 GO, 2019 GD1
I52Steward Obs. Mt. Lemmon Station in Arizona, 28 in MPEC 2019-H04 -- 2019 GQ5, 2019 GQ19, 2019 GP20, 2019 GP2, 2019 GK19, 2019 GJ19, 2019 GH19, 2019 GF19, 2019 GD3, 2019 GD, 2019 GB6, 2019 GA6, 2019 FO1, 2019 FN2, 2019 FH1, 2019 FG1, 2019 EQ1, 2019 ED2, 2019 CH, 2019 CE, 2019 BJ5, 2019 BF4, 2019 AP3, 2018 YA3, 2018 XQ4, 2018 VM3, 2016 AU130, 2015 LJ24
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2019-H04 -- 2019 GJ, 2019 FT1
L01Visnjan Obs., 1 in MPEC 2019-H04 -- 2019 GP19
G33Wickede Obs. in Germany, 1 in MPEC 2019-H04 -- 433
C51WISE in Earth polar orbit, 5 in MPEC 2019-H04 -- 2010 JL33, 86667, 495615, 381677, 180186
I41Zwicky Transient Facility (ZTF) in southern California, 5 in MPEC 2019-H04 -- 2019 AP3, 2015 QT9, 441825, 435138, 159923
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 April '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 GC6JPL Sentry16352101-211431.419438e-06-7.06-7.140JPL: Computed at 08:21 today Pacific time based on 85 observations spanning 15.862 days (2019-Mar-31.33428 to 2019-Apr-16.196118). Diameter approximately 0.017 km. from weighted mean H=26.56.
NEODyS16352055-2118305.25e-06-6.46-6.90NEODyS: "Based on 85 optical observations (of which 0 are rejected as outliers) from 2019-03-31.335 to 2019-04-16.197."
2019 GD1JPL Sentry16352115-211511.580e-06-3.43-3.430JPL: Computed at 07:59 today Pacific time based on 52 observations spanning 12.845 days (2019-Apr-02.47647 to 2019-Apr-15.32175). Diameter approximately 0.310 km. from weighted mean H=20.19.
NEODyS1635211511.73e-06-3.40-3.40NEODyS: "Based on 52 optical observations (of which 0 are rejected as outliers) from 2019-04-02.477 to 2019-04-15.323."
2019 FT1JPL Sentry16352104-211329.745e-08-8.26-8.340JPL: Computed at 07:59 today Pacific time based on 43 observations spanning 11.226 days (2019-Mar-29.3156 to 2019-Apr-09.541473). Diameter approximately 0.014 km. from weighted mean H=26.98.
NEODyS16352104-211321.85e-06-7.01-7.040NEODyS: "Based on 44 optical observations (of which 1 are rejected as outliers) from 2019-03-29.316 to 2019-04-09.542."

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 16 April '19

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

1920Generated Traffic Report
1635Noted that JPL Sentry has updated its 2019 FT1 risk assessment - see above
Noted that NEODyS has updated its 2019 FT1 risk assessment - see above
Noted that JPL Sentry has updated its 2019 GC6 risk assessment - see above
Noted that NEODyS has updated its 2019 GC6 risk assessment - see above
Noted that JPL Sentry has updated its 2019 GD1 risk assessment - see above
Noted that NEODyS has updated its 2019 GD1 risk assessment - see above
Grabbed MPEC 2019-H04 - Daily Orbit Update - see above
0402Grabbed MPEC 2019-H01 - 2016 VE2 - see above
Grabbed MPEC 2019-H02 - 2019 GT2 - see above
Grabbed MPEC 2019-H03 - 2018 TT1 - see above