Contents  on 17 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 17 June '19

Four objects reported inside ten LD

Four asteroids are reported less than ten lunar distances (LD) from Earth today. Nearest is newly announced 2019 LU4, which enters our planet's sphere of gravitational influence as it comes in from 2.98 to 2.01 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
1.97 LD tomorrow 2019 LU4 17 m  2.01 from 2.98 LD June 12 - 23 NEW, NHATS target, Moon closest
2.40 LD at 1530 UTC - MPEC
4.14 LD yesterday 2019 LU 32 m  4.23 to 4.94 LD June 11 - 21 DOU
5.59 LD June 14 2019 LL1 15 m  7.47 to 8.91 LD June 10 - 18
6.43 LD June 20 2019 LB2 14 m  6.61 from 6.81 LD June 9 - 30 NHATS target
Approaching - sorted by 10-LD bubble entry date
9.7   LD June 23* 2019 LM1 24 m  13.9 from 15.4 LD June 21 - 24 EPU +/- 15 mins.*
7.63 LD June 24 441987 2010 NY65 170 m  20.62 from 23.34 LD June 22 - 26 radar target
5.2   LD June 29* 2019 LV1 25 m  17.3 from 18.7 LD June 23 - July 6 EPU +/- 2.58 hours*, NHATS target
* EPU = Earth passage uncertainty

This report was generated at 1950 UTC with the discovery posted late yesterday of 2019 LU4 (MPEC), and with the announcement today of four objects that have already departed: 2019 LV4 (MPEC), which went by at 8.21 LD on June 8th, 2019 LZ4 (MPEC), which passed us at 1.36 LD and the Moon at 0.73 LD on June 7th, and two intruders. 2019 LY4 (MPEC) flew past at 0.22 LD on June 6th and the Moon at 0.63 LD on the 5th, while risk-listed 2019 LW4 (MPEC) zipped by the Earth and Moon at 0.65 and 0.64 LD respectively on June 8th. Today's DOU MPEC has follow-up for outbound 2019 LU.



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 17 June '19

The MPC's NEO Confirmation Page has 84 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 84 objects listed. Of these, thirteen were "one nighters." So far The Tracking News has counted a total of 98 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 17 June '19

Minor Planet Electronic Circulars

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


MPEC 2019-M20 - "17:56 UT" - 2019 LC5


MPEC 2019-M19 - "16:42 UT" - 2019 LB5


MPEC 2019-M18 - "16:42 UT" - 2019 LA5


MPEC 2019-M17 - "16:41 UT" - 2019 KW6


MPEC 2019-M16 - "16:21 UT" - 2016 FJ39


<< DOU on 17 June '19 >>  MPEC 2019-M15 - "11:52 UT" - Daily Orbit Update


MPEC 2019-M14 - "11:14 UT" - 2019 LZ4


MPEC 2019-M13 - "11:13 UT" - 2019 LY4


MPEC 2019-M12 - "11:13 UT" - 2019 LX4


MPEC 2019-M11 - "11:13 UT" - 2019 LW4


MPEC 2019-M10 - "11:11 UT" - 2019 LV4

Observers  on 17 June '19

A total of 53 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2019-M14 -- 2019 LZ4
H21Astronomical Research Obs. Westfield in Illinois, 6 in MPECs 2019-M11, 2019-M13, 2019-M14, 2019-M18, 2019-M19 & 2019-M20 -- 2019 LZ4, 2019 LY4, 2019 LW4, 2019 LC5, 2019 LB5, 2019 LA5
T08ATLAS Mauna Loa in Hawaii, 18 in MPECs 2019-M14 & 2019-M15 -- 2019 LZ4, 2008 LW16, 455736, 429733, 355256, 326777, 318411, 18736, 163696, 163051, 153814, 141593, 7482, 5626, 3102, 2059, 1036, 433
I47Auger Obs. in Argentina, 1 in MPEC 2019-M14 -- 2019 LZ4
C77Bernezzo Obs. in Italy, 1 in MPEC 2019-M14 -- 2019 LZ4
Z84Calar Alto Schmidt in Spain, 2 in MPECs 2019-M10 & 2019-M20 -- 2019 LV4, 2019 LC5
160Castelmartini Obs. in Italy, 3 in MPECs 2019-M14 & 2019-M15 -- 2019 LZ4, 2019 LU, 2019 JX7
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2019-M17 -- 2019 KW6
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2019-M14 -- 2019 LZ4
N55Corona Borealis Obs. in Tibet, 1 in MPEC 2019-M14 -- 2019 LZ4
958Dax Obs. in France, 1 in MPEC 2019-M11 -- 2019 LW4
K87Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2019-M10 -- 2019 LV4
L29Drebach-South Obs., 1 in MPEC 2019-M14 -- 2019 LZ4
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 3 in MPECs 2019-M10, 2019-M13 & 2019-M17 -- 2019 LY4, 2019 LV4, 2019 KW6
734Farpoint Obs. in Kansas, 2 in MPECs 2019-M14 & 2019-M18 -- 2019 LZ4, 2019 LA5
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2019-M11 & 2019-M14 -- 2019 LZ4, 2019 LW4
L19Felsina AAB Obs., 1 in MPEC 2019-M14 -- 2019 LZ4
157Frasso Sabino Obs. in Italy, 1 in MPEC 2019-M14 -- 2019 LZ4
L34Galhassin Robotic Telescope, 1 in MPEC 2019-M11 -- 2019 LW4
X31Galilei Obs., 1 in MPEC 2019-M14 -- 2019 LZ4
K88GINOP-KHK in Hungary, 3 in MPECs 2019-M11, 2019-M14 & 2019-M19 -- 2019 LZ4, 2019 LW4, 2019 LB5
E94Gisborne Obs. in New Zealand, 1 in MPEC 2019-M14 -- 2019 LZ4
J95Great Shefford Obs. in England, 3 in MPECs 2019-M10, 2019-M14 & 2019-M18 -- 2019 LZ4, 2019 LV4, 2019 LA5
A17Guidestar Obs. in Germany, 1 in MPEC 2019-M14 -- 2019 LZ4
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2019-M14 -- 2019 LZ4
H06%Ernesto Guido in Italy via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2019-M14 -- 2019 LZ4
1861program code 1 via Kitab Obs., 1 in MPEC 2019-M14 -- 2019 LZ4
695^Spacewatch via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2019-M13 -- 2019 LY4
246KLENOT in the Czech Republic, 1 in MPEC 2019-M10 -- 2019 LV4
K38M57 Obs. in Italy, 1 in MPEC 2019-M14 -- 2019 LZ4
568^R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2019-M17 -- 2019 KW6
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2019-M10 -- 2019 LV4
C82Nastro Verde Obs. in Italy, 1 in MPEC 2019-M14 -- 2019 LZ4
J69North Obs. in England, 1 in MPEC 2019-M14 -- 2019 LZ4
Z80Northolt Branch Obs. in England, 1 in MPEC 2019-M14 -- 2019 LZ4
F51Pan-STARRS 1 (PS1) in Hawaii, 7 in MPECs 2019-M10, 2019-M12, 2019-M13, 2019-M17, 2019-M18, 2019-M19 & 2019-M20 -- 2019 LY4, 2019 LX4, 2019 LV4, 2019 LC5, 2019 LB5, 2019 LA5, 2019 KW6
F52Pan-STARRS 2 (PS2) in Hawaii, 6 in MPECs 2019-M10, 2019-M11, 2019-M12, 2019-M13, 2019-M19 & 2019-M20 -- 2019 LY4, 2019 LX4, 2019 LW4, 2019 LV4, 2019 LC5, 2019 LB5
K63Pascoli Obs. in Italy, 1 in MPEC 2019-M14 -- 2019 LZ4
L18QOS Obs., 1 in MPEC 2019-M14 -- 2019 LZ4
104San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2019-M10, 2019-M11 & 2019-M14 -- 2019 LZ4, 2019 LW4, 2019 LV4
C95SATINO-1 in France, 3 in MPECs 2019-M11, 2019-M14 & 2019-M15 -- 2019 LZ4, 2019 LW4, 2019 FH
204Schiaparelli Obs. in Italy, 1 in MPEC 2019-M14 -- 2019 LZ4
G40*program code "*" (19) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-M14 -- 2019 LZ4
G40-program code "-" (22) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-M14 -- 2019 LZ4
Y00SONEAR in Brazil, 1 in MPEC 2019-M14 -- 2019 LZ4
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2019-M12 & 2019-M20 -- 2019 LX4, 2019 LC5
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2019-M17 & 2019-M20 -- 2019 LC5, 2019 KW6
L39Spica Obs., 1 in MPEC 2019-M14 -- 2019 LZ4
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2019-M11 -- 2019 LW4
I52Steward Obs. Mt. Lemmon Station in Arizona, 8 in MPECs 2019-M10, 2019-M11, 2019-M13, 2019-M14, 2019-M17, 2019-M18, 2019-M19 & 2019-M20 -- 2019 LZ4, 2019 LY4, 2019 LW4, 2019 LV4, 2019 LC5, 2019 LB5, 2019 LA5, 2019 KW6
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2019-M16 -- 2016 FJ39
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2019-M14 -- 2019 LZ4
L01Visnjan Obs., 7 in MPECs 2019-M10, 2019-M11, 2019-M13, 2019-M14, 2019-M18, 2019-M19 & 2019-M20 -- 2019 LZ4, 2019 LY4, 2019 LW4, 2019 LV4, 2019 LC5, 2019 LB5, 2019 LA5
718Wiggins Obs. in Utah, 1 in MPEC 2019-M14 -- 2019 LZ4
I41Zwicky Transient Facility (ZTF) in southern California, 3 in MPECs 2019-M11, 2019-M13 & 2019-M14 -- 2019 LZ4, 2019 LY4, 2019 LW4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 June '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 LW4JPL Sentry15352083-2115380.0010444883964-4.28-4.320JPL: Computed at 05:42 today Pacific time based on 64 observations spanning 7.7692 days (2019-May-31.53752 to 2019-Jun-08.306767). Diameter approximately 0.012 km. from weighted mean H=27.28.
NEODyS15352083-2117601.46e-04-5.15-5.20NEODyS: "Based on 64 optical observations (of which 3 are rejected as outliers) from 2019-05-31.538 to 2019-06-08.308."
2019 LR4NEODyS15352099-2117124.54e-06-5.83-6.110NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2019-05-27.368 to 2019-06-14.279."

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 17 June '19

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

1950Generated Traffic Report
1800Grabbed MPEC 2019-M16 - 2016 FJ39 - see above
Grabbed MPEC 2019-M17 - 2019 KW6 - see above
Grabbed MPEC 2019-M18 - 2019 LA5 - see above
Grabbed MPEC 2019-M19 - 2019 LB5 - see above
Grabbed MPEC 2019-M20 - 2019 LC5 - see above
1535Noted that NEODyS has posted 2019 LR4 as an impact risk - see above
Noted that JPL Sentry has posted 2019 LW4 as an impact risk - see above
Noted that NEODyS has posted 2019 LW4 as an impact risk - see above
1534Grabbed MPEC 2019-M10 - 2019 LV4 - see above
Grabbed MPEC 2019-M11 - 2019 LW4 - see above
Grabbed MPEC 2019-M12 - 2019 LX4 - see above
Grabbed MPEC 2019-M13 - 2019 LY4 - see above
Grabbed MPEC 2019-M14 - 2019 LZ4 - see above
Grabbed MPEC 2019-M15 - Daily Orbit Update - see above