Contents  on 16 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 16 June '19

Four objects reported inside ten LD

Bulletin - 2233, updated 2353 UTC:  One new discovery of a close passer has been announced.

Earth passageI D~Size~Inside ten LDNotes
1.97 LD at 0529 UTC June 182019 LU417 m June 12 - 24MPEC


Four celestial objects have been reported inside ten lunar distances (LD) of our planet today. Nearest of these is 2019 LU, which comes its closest to Earth on this passage -- 4.14 LD. And, as noted in recent traffic reports, there are most likely other objects in the neighborhood as we wait for the return of Minor Planet Center's ability to announce new discoveries.

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  9.28 to 10.05 LD May 26 - today NHATS target, exits ten LD
4.14 LD today 2019 LU 32 m  4.14 LD June 11 - 21 Earth closest at 1147 UTC
5.59 LD June 14 2019 LL1 15 m  6.34 to 7.47 LD June 10 - 18
6.43 LD June 20 2019 LB2 14 m  6.81 from 7.10 LD June 9 - 30 NHATS target
Approaching - sorted by 10-LD bubble entry date
9.7   LD June 23* 2019 LM1 24 m  15.4 from 17.0 LD June 21 - 24 EPU +/- 15 mins.*
7.63 LD June 24 441987 2010 NY65 170 m  23.34 from 26.10 LD June 22 - 26 radar target
5.2   LD June 29* 2019 LV1 25 m  18.7 from 20.0 LD June 23 - July 6 EPU +/- 2.58 hours*, NHATS target
* EPU = Earth passage uncertainty

This report was generated at 1920 UTC with follow-up in today's DOU MPEC for 68347 2001 KB67, which flew by us at 9.50 LD a year ago May but isn't coming inside ten LD this time around.



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. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 16 June '19

The MPC's NEO Confirmation Page has 97 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 97 objects listed. Of these, seventeen were "one nighters." The Tracking News counted a total of 107 listings on the NEOCP on this day.

New MPECs  on 16 June '19

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there were nine MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2019-M09 - "22:19 UT" - 2019 LU4


MPEC 2019-M08 - "22:18 UT" - 2019 LT4


MPEC 2019-M07 - "22:18 UT" - 2019 LS4


MPEC 2019-M06 - "22:18 UT" - 2019 LR4


MPEC 2019-M05 - "22:17 UT" - 2019 LQ4


MPEC 2019-M04 - "22:09 UT" - 2019 KV6


MPEC 2019-M03 - "15:01 UT" - 2015 US81


<< DOU on 16 June '19 >>  MPEC 2019-M02 - "12:11 UT" - Daily Orbit Update


MPEC 2019-M01 - "00:06 UT" - 2019 LP4

Observers  on 16 June '19

A total of 38 observers appeared in this day's MPECs.

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2019-M02 -- 1866
H21Astronomical Research Obs. Westfield in Illinois, 4 in MPECs 2019-M01, 2019-M02, 2019-M07 & 2019-M09 -- 2019 LU4, 2019 LS4, 2019 LP4, 2019 JF7
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2019-M02 -- 2011 LH
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2019-M02 -- 2011 LH
073Bucharest Obs. in Romania, 3 in MPEC 2019-M02 -- 66391, 453778, 112221
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2019-M05 -- 2019 LQ4
160Castelmartini Obs. in Italy, 14 in MPEC 2019-M02 -- 2019 JX7, 2011 LH, 2006 KE, 66391, 495615, 491567, 455736, 35107, 326777, 257744, 159686, 143947, 137170, 6178
K87Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2019-M02 -- 2019 JX7
J27El Guijo Obs. in Spain, 4 in MPEC 2019-M02 -- 2019 JX7, 68950, 453778, 12538
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2019-M05 -- 2019 LQ4
734Farpoint Obs. in Kansas, 2 in MPECs 2019-M01 & 2019-M06 -- 2019 LR4, 2019 LP4
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2019-M09 -- 2019 LU4
K83Forti Obs., 1 in MPEC 2019-M02 -- 68950
K88GINOP-KHK in Hungary, 2 in MPECs 2019-M01 & 2019-M05 -- 2019 LQ4, 2019 LP4
J95Great Shefford Obs. in England, 2 in MPECs 2019-M05 & 2019-M09 -- 2019 LU4, 2019 LQ4
A17Guidestar Obs. in Germany, 1 in MPEC 2019-M02 -- 2019 JX7
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 2 in MPECs 2019-M06 & 2019-M08 -- 2019 LT4, 2019 LR4
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2019-M02 -- 257744
L52MASTER Tavrida, 1 in MPEC 2019-M02 -- 112221
K95MASTER-II Sutherland in South Africa, 3 in MPEC 2019-M02 -- 308242, 11066, 5131
474Mt. John Obs. in New Zealand, 1 in MPEC 2019-M05 -- 2019 LQ4
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2019-M04 -- 2019 KV6
Z80Northolt Branch Obs. in England, 2 in MPEC 2019-M02 -- 2019 JX7, 2011 HP
C23Olmen Obs. in Belgium, 1 in MPEC 2019-M02 -- 66391
F51Pan-STARRS 1 (PS1) in Hawaii, 12 in MPECs 2019-M01, 2019-M02, 2019-M04, 2019-M05, 2019-M06, 2019-M07, 2019-M08 & 2019-M09 -- 2019 LU4, 2019 LT4, 2019 LS4, 2019 LR4, 2019 LQ4, 2019 LP4, 2019 KV6, 2016 LX8, 2014 HO4, 53435, 278327, 189011
F52Pan-STARRS 2 (PS2) in Hawaii, 6 in MPECs 2019-M01, 2019-M04, 2019-M06, 2019-M07, 2019-M08 & 2019-M09 -- 2019 LU4, 2019 LT4, 2019 LS4, 2019 LR4, 2019 LP4, 2019 KV6
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2019-M05 -- 2019 LQ4
204Schiaparelli Obs. in Italy, 3 in MPEC 2019-M02 -- 2011 LH, 2006 KE, 533671
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-M02 -- 68347
G40-program code "-" (22) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-M02 -- 495615
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2019-M05 -- 2019 LQ4
291Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2019-M02, 2019-M05, 2019-M06 & 2019-M07 -- 2019 LS4, 2019 LR4, 2019 LQ4, 2019 LE1
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2019-M02 -- 418900
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2019-M01 & 2019-M09 -- 2019 LU4, 2019 LP4
I52Steward Obs. Mt. Lemmon Station in Arizona, 5 in MPECs 2019-M01, 2019-M02, 2019-M05, 2019-M06 & 2019-M09 -- 2019 LU4, 2019 LR4, 2019 LQ4, 2019 LP4, 2005 LW39
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2019-M03 -- 2015 US81
L01Visnjan Obs., 3 in MPECs 2019-M01, 2019-M05 & 2019-M09 -- 2019 LU4, 2019 LQ4, 2019 LP4
I15Wishing Star Obs. in Rhode Island, 4 in MPEC 2019-M02 -- 453778, 418900, 12538, 7889
I41Zwicky Transient Facility (ZTF) in southern California, 7 in MPECs 2019-M01 & 2019-M02 -- 2019 LP4, 87309, 495222, 418900, 242450, 164121, 10563
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 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 LR4JPL Sentry23592099-211361.55765e-05-5.30-5.450JPL: Computed at 16:29 today Pacific time based on 23 observations spanning 17.911 days (2019-May-27.3673 to 2019-Jun-14.27864). Diameter approximately 0.030 km. from weighted mean H=25.27.

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 June '19

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

2359Noted that JPL Sentry has posted 2019 LR4 as an impact risk - see above
2230Grabbed MPEC 2019-M04 - 2019 KV6 - see above
Grabbed MPEC 2019-M05 - 2019 LQ4 - see above
Grabbed MPEC 2019-M06 - 2019 LR4 - see above
Grabbed MPEC 2019-M07 - 2019 LS4 - see above
Grabbed MPEC 2019-M08 - 2019 LT4 - see above
Grabbed MPEC 2019-M09 - 2019 LU4 - see above
1920Generated Traffic Report
1605Grabbed MPEC 2019-M02 - Daily Orbit Update - see above
Grabbed MPEC 2019-M03 - 2015 US81 - see above
0017Grabbed MPEC 2019-M01 - 2019 LP4 - see above