Contents  on 14 June '19

Asteroid/Comet Connection (A/CC) Resources:

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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 14 June '19

Five objects reported inside ten LD

Five asteroidal objects have been reported inside ten lunar distances (LD) of our home world today. Nearest of these is 2019 LU, which is inbound from 6.09 to 4.92 LD. There are likely other close-passers not yet announced by the Minor Planet Center due to a major service interruption.

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  7.79 to 8.53 LD May 26 - June 16 NHATS target - DOU
4.1   LD June 16* 2019 LU 33 m  4.9 from 6.1 LD June 11 - 21 EPU +/- 10 mins.* - DOU, DOU
5.6   LD today* 2019 LL1 14 m  5.6 LD June 10 - 18 EPU +/- 6 mins.* (old data),
Earth closest at 1205 UTC - DOU
6.4   LD June 20* 2019 LB2 14 m  7.4 from 7.8 LD June 9 - 30 EPU +/- 13 mins.*, NHATS target
9.09 LD June 12 2019 LB 31 m  9.29 to 9.66 LD June 9 - 15 NHATS target - DOU
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  18.6 from 20.3 LD June 21 - 24 EPU +/- 15 mins.*
7.63 LD June 24 441987 2010 NY65 170 m  28.91 from 31.75 LD June 22 - 26 radar target
5.2   LD June 29* 2019 LV1 25 m  21.4 from 22.8 LD June 23 - July 6 EPU +/- 2.58 hours*, NHATS target
* EPU = Earth passage uncertainty

This report was generated at 2305 UTC to report on DOU MPECs issued yesterday and today. Yesterday's has follow-up for inbound 2019 LU, passing 2019 LL1, outbound objects 2019 LB and 2019 KA3, and departed objects 2019 KN2 and risk-listed 2019 LA2, plus astrometry from May for 2019 JK3, 2019 JV1, 2019 JG1, 2019 JM, and 2012 KT12. (At last check JPL Horizons had not yet updated with the new data for 2019 LA2 and 2019 LL1.) Today's DOU has follow-up for inbound 2019 LU and departed 2019 JU5.
        The MPC Status Page extended yesterday's statement to include, "We are working as quickly as possible to re-establish the remaining MPEC processes under linux rather than VMS. This includes MPECs designating new objects." And today the page explained that "We are now beta-testing the designation of non-NEO and NEO objects currently on the NEOCP. We anticipate that the release of MPECs for NEOs currently on the NEOCP will take place over the course of June 14th and June 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. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 14 June '19

The MPC's NEO Confirmation Page has 200 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 200 objects listed. Of these, 27 were "one nighters." So far The Tracking News has counted a total of 212 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 14 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 14 June '19 >>  MPEC 2019-L98 - "13:41 UT" - Daily Orbit Update

MPEC 2019-L97 - "03:40 UT" - 2010 NA

Observers  on 14 June '19

Twelve observers appear in today's MPECs.

CodeObserver / observatory
T05ATLAS Haleakala in Hawaii, 2 in MPEC 2019-L98 -- 2019 LU, 2008 LW16
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2019-L97 & 2019-L98 -- 2014 EA49, 2010 NA
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 3 in MPEC 2019-L98 -- 2019 LZ1, 2019 AV2, 2014 EA49
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2019-L97 & 2019-L98 -- 2019 EQ1, 2010 NA
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2019-L97 & 2019-L98 -- 2019 LT, 2019 JW2, 2016 NW22, 2013 LG16, 2010 NA
F52Pan-STARRS 2 (PS2) in Hawaii, 9 in MPEC 2019-L98 -- 2019 LS, 2019 KR, 2019 KP, 2019 JX7, 2019 JU5, 2018 XG5, 2014 HO4, 2014 EA49, 497025
L04ROASTERR-1 in Romania, 3 in MPEC 2019-L98 -- 2019 LU, 2019 JX7, 2019 HC
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2019-L97 -- 2010 NA
G40,program code "," (21) via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-L98 -- 2019 GD3
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2019-L97 -- 2010 NA
I52Steward Obs. Mt. Lemmon Station in Arizona, 5 in MPECs 2019-L97 & 2019-L98 -- 2019 LX1, 2019 LT, 2019 JW2, 2019 EQ1, 2010 NA
L01Visnjan Obs., 1 in MPEC 2019-L97 -- 2010 NA
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 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.





Notes for Today's Latest Risk Assessments
2019 LA2NEODyS15022073-2117214.09e-06-6.31-6.790NEODyS: "Based on 29 optical observations (of which 2 are rejected as outliers) from 2019-06-04.234 to 2019-06-05.191."
2019 LZ1NEODyS1530R E M O V E D-

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 14 June '19

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

2305Generated Traffic Report
1530Noted that NEODyS has removed 2019 LZ1 as an impact risk - see above
1502Noted that NEODyS has updated its 2019 LA2 risk assessment - see above
Grabbed MPEC 2019-L98 - Daily Orbit Update - see above
0531Grabbed MPEC 2019-L97 - 2010 NA - see above