Contents  on 12 June '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 June '19

Five objects reported inside ten LD

Five minor objects have been reported within ten lunar distances (LD) of our planet today. Of these, the closest are 2019 LL1, inbound from 7.48 to 6.34 LD, and 2019 KA3, outbound from 6.38 to 7.07 LD. It would be surprising if there are not others, considering the current 200-plus listings on the NEO Confirmation Page and the fact that no discoveries have been announced in the past week. (Even without official designations, however, these objects are being watched routinely for possible impact risks.)

Neighborhood Traffic - sorted by Earth passage distance, grouped by 2.41, 5.0 & 10.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
3.94 LD June 6 2019 KA3 8 m  6.38 to 7.07 LD May 26 - June 16 NHATS target
4.1   LD June 16* 2019 LU 33 m  7.5 from 9.0 LD yesterday - June 21 EPU +/- 10 mins.*
5.6   LD June 14* 2019 LL1 14 m  6.3 from 7.5 LD June 10 - 18 EPU +/- 6 mins.* - DOU
6.4   LD June 20* 2019 LB2 14 m  8.3 from 8.8 LD June 9 - 30 EPU +/- 13 mins.*, NHATS target
9.09 LD today 2019 LB 31 m  9.09 LD June 9 - 15 NHATS target, Earth closest at 1437 UTC
Approaching - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
9.7   LD June 23* 2019 LM1 24 m  22.1 from 23.9 LD June 21 - 24 EPU +/- 15 mins.*
7.63 LD June 24 441987 2010 NY65 170 m  34.63 from 37.53 LD June 22 - 26 radar target
5.2   LD June 29* 2019 LV1 25 m  24.2 from 25.6 LD June 23 - July 6 EPU +/- 2.58 hours*, NHATS target - DOU
* EPU = Earth passage uncertainty

This report was generated at 2050 UTC with today's first and second DOU MPECs. The two together have first follow-up for departed risk-listed 2019 LA2 (7.27 days added to 0.96-day discovery arc), restated observations for approaching 2019 LV1 and inbound 2019 LL1, and astrometry from March for distant 68216 2001 CV26 and from 2011 for 308635 2005 YU55.



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 approached Earth within ten LD since A/CC began these traffic reports twelve-plus years ago but is not currently coming 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 12 June '19

The MPC's NEO Confirmation Page has 197 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 197 objects listed. Of these, 26 were "one nighters." So far The Tracking News has counted a total of 203 listings on the NEOCP today.

New MPECs  on 12 June '19

Minor Planet Electronic Circulars

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


<< DOU on 12 June '19 >>  MPEC 2019-L89 - "17:04 UT" - Daily Orbit Update


<< DOU on 12 June '19 >>  MPEC 2019-L88 - "01:44 UT" - Daily Orbit Update

Observers  on 12 June '19

A total of 51 observers appear in today's MPECs.

CodeObserver / observatory
C97Al-Fulaij Obs., 9 in MPEC 2019-L88 -- 453778, 381906, 297300, 144898, 141525, 137170, 12538, 1685, 1620
J57Alto Turia Obs. in Spain, 1 in MPEC 2019-L88 -- 112221
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPEC 2019-L88 -- 528650, 141525
073Bucharest Obs. in Romania, 1 in MPEC 2019-L88 -- 141525
Z36Cancelada Obs., 1 in MPEC 2019-L88 -- 141525
160Castelmartini Obs. in Italy, 15 in MPEC 2019-L88 -- 2019 JX7, 68950, 522684, 453778, 387816, 304330, 257744, 184990, 162181, 144898, 142040, 141765, 12538, 112221, 5693
703Catalina Sky Survey (CSS) in Arizona, 16 in MPEC 2019-L89 -- 2019 JX7, 2019 GD3, 85989, 68950, 533671, 530531, 524268, 491567, 453778, 427643, 35107, 277142, 244670, 163696, 162181, 3103
V06Catalina Sky Survey Kuiper Telescope in Arizona, 1 in MPEC 2019-L88 -- 2019 LV1
309&Marco Micheli via Cerro Paranal in Chile, 1 in MPEC 2019-L89 -- 2018 XB4
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPEC 2019-L88 -- 2019 LS1, 2019 LR1, 2019 JC47
L05Dridri Obs. in Italy, 1 in MPEC 2019-L88 -- 453778
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 4 in MPECs 2019-L88 & 2019-L89 -- 2019 LZ1, 2019 LU1, 2019 LJ1, 2019 LA2
W46Foxfire Village Obs., 1 in MPEC 2019-L88 -- 68950
238Grorudalen Obs. in Norway, 4 in MPEC 2019-L88 -- 141525, 137170, 12538, 112221
134Groszschwabhausen Obs. in Germany, 1 in MPEC 2019-L88 -- 308635
240Herrenberg Obs. in Germany, 2 in MPEC 2019-L88 -- 88254, 144898
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2019-L88 -- 4581
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2019-L88 -- 112221
P931program code 1 via JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2019-L88 -- 184990
186Kitab Obs., 1 in MPEC 2019-L88 -- 68950
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 3 in MPEC 2019-L89 -- 2019 LE1, 2019 LA2, 2019 KQ5
168Kourovskaya Obs. in Russia, 3 in MPEC 2019-L88 -- 68216, 381677, 152931
Z43Landehen Obs., 1 in MPEC 2019-L88 -- 244670
Z22MASTER IAC Obs. in the Canary Islands, 2 in MPEC 2019-L88 -- 87025, 1685
W92MASTER OAFA Obs., 1 in MPEC 2019-L88 -- 396593
L52MASTER Tavrida, 1 in MPEC 2019-L88 -- 396593
108Montelupo Obs. in Italy, 1 in MPEC 2019-L88 -- 112221
K74Muensterschwarzach Obs. in Germany, 2 in MPEC 2019-L88 -- 152931, 141525
566NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2019-L88 -- 1566
0895N.V. Maigurova via Nikolaev Obs. in Ukraine, 1 in MPEC 2019-L88 -- 381677
C47Nonndorf Obs. in Austria, 1 in MPEC 2019-L88 -- 141525
Z80Northolt Branch Obs. in England, 8 in MPEC 2019-L88 -- 87025, 68950, 522684, 244670, 184990, 141525, 12538, 112221
C23Olmen Obs. in Belgium, 2 in MPEC 2019-L88 -- 68950, 137170
F51Pan-STARRS 1 (PS1) in Hawaii, 8 in MPEC 2019-L89 -- 2016 NH15, 2013 RX80, 364762, 23183, 206359, 189011, 159609, 5879
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2019-L88 -- 2019 LJ1
K63Pascoli Obs. in Italy, 2 in MPEC 2019-L88 -- 66253, 144898
K80Platanus Obs., 1 in MPEC 2019-L88 -- 66253
D29Purple Mtn. Obs. Xuyi Station in China, 2 in MPEC 2019-L88 -- 495222, 468910
L18QOS Obs., 2 in MPEC 2019-L88 -- 2019 JX7, 522684
C95SATINO-1 in France, 3 in MPECs 2019-L88 & 2019-L89 -- 2019 EE1, 2017 XD62, 2014 SZ303
0948program code 8 via Simeis Obs. in Ukraine, 1 in MPEC 2019-L88 -- 528159
G40"G. Gasparovic in Croatia via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-L88 -- 141525
G40'W.F. Cashwell in Nevada via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-L88 -- 244670
G40)program code ")" (18) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-L88 -- 528159
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2019-L88 & 2019-L89 -- 2019 LL1, 2019 KB4, 2012 HR69, 2000 EU70
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2019-L88 -- 2019 LZ1, 2019 LE1
I52Steward Obs. Mt. Lemmon Station in Arizona, 4 in MPECs 2019-L88 & 2019-L89 -- 2019 LW1, 2019 LN1, 2019 KB4, 2019 GJ19
A16Tentlingen Obs. in Switzerland, 1 in MPEC 2019-L88 -- 12538
B18Terskol Obs. in Russia, 1 in MPEC 2019-L88 -- 2008 KV2
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 5 in MPECs 2019-L88 & 2019-L89 -- 2019 LZ1, 2019 LU1, 2019 LJ1, 2019 LA2, 2018 XE5
L01Visnjan Obs., 1 in MPEC 2019-L88 -- 453778
C51WISE in Earth polar orbit, 4 in MPEC 2019-L88 -- 530531, 514041, 424089, 4957
I15Wishing Star Obs. in Rhode Island, 5 in MPECs 2019-L88 & 2019-L89 -- 2019 GD3, 66253, 297300, 244670, 137170
I41Zwicky Transient Facility (ZTF) in southern California, 14 in MPEC 2019-L88 -- 2018 JB3, 2017 YT5, 2012 PW, 2009 OB3, 68031, 441825, 376775, 355256, 326777, 304330, 173561, 162082, 153842, 112221
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 June '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 LA2NEODyS20352088-2117193.45e-06-6.43-6.740NEODyS: "Based on 35 optical observations (of which 2 are rejected as outliers) from 2019-06-04.234 to 2019-06-12.456."
JPL Sentry19152091-211672.7791236e-06-6.52-6.730JPL: Computed at 11:36 today Pacific time based on 33 observations spanning 8.2217 days (2019-Jun-04.23363 to 2019-Jun-12.45534). Diameter approximately 0.016 km. from weighted mean H=26.59.
2019 LZ1NEODyS1537208016.29e-10-6.14-6.140NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2019-05-31.171 to 2019-06-09.192."
2019 LU1JPL Sentry15372056-207084.65486e-06-4.30-4.360JPL: Computed at 00:38 today Pacific time based on 26 observations spanning 6.8508 days (2019-Jun-01.417911 to 2019-Jun-08.268733). Diameter approximately 0.050 km. from weighted mean H=24.17.
NEODyS15372056-2070146.05e-06-4.21-4.330NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2019-06-01.419 to 2019-06-08.270."
2019 LJ1JPL Sentry15372095-209513.220e-08-6.43-6.430JPL: Computed at 23:47 June 11th Pacific time based on 26 observations spanning 16.947 days (2019-May-25.383914 to 2019-Jun-11.330748). Diameter approximately 0.088 km. from weighted mean H=22.94.
NEODyS15372095-210838.68e-08-6.03-6.090NEODyS: "Based on 27 optical observations (of which 1 are rejected as outliers) from 2019-05-25.385 to 2019-06-11.332."
2018 XB4NEODyS2035R E M O V E D-
JPL Sentry1915R E M O V E DJPL: Risk listing removed at 1833 UTC today

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 June '19

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

2050Generated Traffic Report
2035Noted that NEODyS has removed 2018 XB4 as an impact risk - see above
Noted that NEODyS has updated its 2019 LA2 risk assessment - see above
1915Noted that JPL Sentry has removed 2018 XB4 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 LA2 risk assessment - see above
Grabbed MPEC 2019-L89 - Daily Orbit Update - see above
1537Noted that JPL Sentry has updated its 2019 LJ1 risk assessment - see above
Noted that NEODyS has updated its 2019 LJ1 risk assessment - see above
Noted that JPL Sentry has updated its 2019 LU1 risk assessment - see above
Noted that NEODyS has updated its 2019 LU1 risk assessment - see above
Noted that NEODyS has updated its 2019 LZ1 risk assessment - see above
0312Grabbed MPEC 2019-L88 - Daily Orbit Update - see above