Contents  on 12 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 12 April '19

Eighteen objects reported inside ten LD

Based on JPL Horizons data from three days ago, there are eighteen asteroids flying within ten lunar distances (LD) of Earth today. See the DOU MPEC below for new observations of risk-listed and other close passers. This report was generated at 2110 UTC. [Due to problems in acquiring data, there was no traffic report on this day. The previous and next regular traffic reports were posted on April 9th and April 15th.]



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 April '19

The MPC's NEO Confirmation Page has 113 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 113 objects listed. Of these, 55 were "one nighters." So far The Tracking News has counted a total of 130 listings on the NEOCP today.

New MPECs  on 12 April '19

Minor Planet Electronic Circulars

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


<< DOU on 12 Apr. '19 >>  MPEC 2019-G153 - "12:07 UT" - Daily Orbit Update

Observers  on 12 April '19

A total of 20 observers appear in today's MPEC.

CodeObserver / observatory
T05ATLAS Haleakala in Hawaii, 18 in MPEC 2019-G153 -- 88254, 86667, 85236, 523603, 458198, 453778, 308127, 267729, 238063, 18736, 168378, 163051, 163000, 144898, 9162, 5693, 4581, 1917
T08ATLAS Mauna Loa in Hawaii, 18 in MPEC 2019-G153 -- 2019 GM4, 2019 AP3, 2009 DL1, 2005 YY36, 89959, 88254, 86667, 85236, 523641, 394130, 358453, 238063, 230599, 18736, 163000, 5693, 4581, 4401
K46Bamberg Obs. in Germany, 2 in MPEC 2019-G153 -- 1036, 433
C77Bernezzo Obs. in Italy, 1 in MPEC 2019-G153 -- 2019 FB2
X74Campo dos Amarais Obs., 1 in MPEC 2019-G153 -- 3199
703Catalina Sky Survey (CSS) in Arizona, 36 in MPEC 2019-G153 -- 2019 FN2, 2018 RX, 2006 SK134, 2001 FR128, 96631, 89959, 88254, 86667, 85236, 523603, 459451, 453778, 358453, 356285, 348776, 307918, 267759, 267729, 257838, 238063, 211871, 18736, 178871, 168378, 162433, 152931, 144898, 138325, 138095, 136635, 11054, 9162, 4401, 1917, 1036, 433
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 12 in MPEC 2019-G153 -- 2019 GT1, 2019 GH4, 2019 GF3, 2019 GE4, 2019 GD3, 2019 GB4, 2019 FE1, 2019 ES1, 2019 EP2, 2019 CT1, 2019 CE5, 2016 LU10
W84%program code "%" (14) via DECam in Chile, 1 in MPEC 2019-G153 -- 2014 JU79
203GiaGa Obs. in Italy, 1 in MPEC 2019-G153 -- 2019 FB2
G96Mt. Lemmon Survey (MLS) in Arizona, 32 in MPEC 2019-G153 -- 2019 FD1, 2018 VG8, 2018 RW7, 2017 UO6, 2015 FZ344, 65803, 523619, 495222, 459451, 381906, 367684, 364877, 361532, 356285, 32906, 318450, 281365, 277810, 211871, 187040, 168378, 163412, 162273, 159857, 141531, 9162, 8567, 7474, 6050, 5797, 2368, 1036
K74Muensterschwarzach Obs. in Germany, 1 in MPEC 2019-G153 -- 2019 GL4
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2019-G153 -- 2018 RX
F51Pan-STARRS 1 (PS1) in Hawaii, 8 in MPEC 2019-G153 -- 85236, 52381, 523623, 499496, 385843, 376775, 159923, 5693
D29Purple Mtn. Obs. Xuyi Station in China, 2 in MPEC 2019-G153 -- 2019 CN4, 144898
C95SATINO-1 in France, 2 in MPEC 2019-G153 -- 2019 FB2, 2018 XU6
204Schiaparelli Obs. in Italy, 36 in MPEC 2019-G153 -- 2019 FZ, 2019 FX, 2019 FR, 2019 FO, 2019 FL, 2019 FJ1, 2019 FB1, 2019 FA1, 2019 EV2, 2019 EU1, 2019 EP2, 2019 EN, 2019 EC2, 2019 EC1, 2019 EA2, 2019 DR1, 2019 DL1, 2019 DJ1, 2019 DH1, 2019 DH, 2019 CN4, 2019 CH, 2019 CD5, 2019 BF4, 2019 AP3, 2018 TD4, 2018 DA1, 2014 QR295, 2013 PF67, 2012 BN11, 2009 BL71, 2006 SK134, 2005 FC3, 2000 FP10, 523641, 178871
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2019-G153 -- 2019 GR, 2019 FC3
I52Steward Obs. Mt. Lemmon Station in Arizona, 1 in MPEC 2019-G153 -- 2019 FB3
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2019-G153 -- 2019 GT3
I41Zwicky Transient Facility (ZTF) in southern California, 3 in MPEC 2019-G153 -- 2019 EQ1, 2016 JG18, 7889
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 April '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 GJ5JPL Sentry2208R E M O V E DJPL #3 for the day: Risk listing removed at 1617 UTC April 11th
2019 GF3JPL Sentry1625R E M O V E DJPL: Risk listing removed at 1539 UTC today
NEODyS1625209316.51e-10-8.41-8.410NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2019-04-04.351 to 2019-04-11.052."
2019 FB1JPL Sentry16252113-211723.143e-06-7.22-7.380JPL: Computed at 08:30 today Pacific time based on 81 observations spanning 2.5646 days (2019-Mar-28.42768 to 2019-Mar-30.992243). Diameter approximately 0.010 km. from weighted mean H=27.74.
2019 DJ1JPL Sentry1625R E M O V E DJPL: Risk listing removed at 1524 UTC today
NEODyS1625210812.06e-07-8.00-8.00NEODyS: "Based on 83 optical observations (of which 0 are rejected as outliers) from 2018-02-12.515 to 2019-03-12.880."
2014 JU79JPL Sentry1625R E M O V E DJPL: Risk listing removed at 1507 UTC today
NEODyS16252041-204528.18e-10-8.01-8.080NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2014-05-04.425 to 2014-05-06.381."

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 April '19

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

2208Noted that JPL Sentry has removed 2019 GJ5 as an impact risk - see above
2110Generated Traffic Report
1801Noted that JPL Sentry has reposted 2019 GJ5 as an impact risk - see above
1702Noted that JPL Sentry has removed 2019 GJ5 as an impact risk - see above
1625Noted that JPL Sentry has removed 2014 JU79 as an impact risk - see above
Noted that NEODyS has updated its 2014 JU79 risk assessment - see above
Noted that JPL Sentry has removed 2019 DJ1 as an impact risk - see above
Noted that NEODyS has updated its 2019 DJ1 risk assessment - see above
Noted that JPL Sentry has updated its 2019 FB1 risk assessment - see above
Noted that JPL Sentry has removed 2019 GF3 as an impact risk - see above
Noted that NEODyS has updated its 2019 GF3 risk assessment - see above
Grabbed MPEC 2019-G153 - Daily Orbit Update - see above