Contents  on 22 May '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 22 May '19

Three objects reported inside ten LD

Three small Solar-System bodies are known to be less than ten lunar distances (LD) from Earth today, all outbound and none of them closer than 4.14 LD.

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
2.48 LD May 20 2019 JL3 36 m  4.14 to 5.84 LD May 15 - 25
4.14 LD May 17 2012 KT12 19 m  5.69 to 6.32 LD May 7 - 27 NHATS target
6.09 LD May 17 2019 GT1 34 m  7.06 to 7.54 LD May 8 - 26 NHATS target

This report was generated at 2032 UTC with first follow-up for departed 2019 JD6 (9.42 days added to its 5.48-day discovery arc) in today's DOU MPEC along with continuing follow-up for dimming risk-listed 2019 JK.

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 22 May '19

The MPC's NEO Confirmation Page has 41 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 41 objects listed. Of these, four were "one nighters." So far The Tracking News has counted a total of 44 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 22 May '19

Minor Planet Electronic Circulars

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

<< DOU on 22 May '19 >>  MPEC 2019-K11 - "12:36 UT" - Daily Orbit Update

Observers  on 22 May '19

Ten observers appear in today's MPEC.

CodeObserver / observatory
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 11 in MPEC 2019-K11 -- 2019 JL1, 2019 JK1, 2019 JK, 2019 JF1, 2019 JC1, 2019 HO, 2019 GP5, 2019 GM19, 2019 GL19, 2019 GJ21, 2018 XV
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2019-K11 -- 1980
W92MASTER OAFA Obs., 1 in MPEC 2019-K11 -- 1980
J69North Obs. in England, 1 in MPEC 2019-K11 -- 2019 HC
Z80Northolt Branch Obs. in England, 4 in MPEC 2019-K11 -- 2019 HC, 2008 WX32, 244670, 112221
C95SATINO-1 in France, 2 in MPEC 2019-K11 -- 2016 KR3, 2016 GG135
204Schiaparelli Obs. in Italy, 3 in MPEC 2019-K11 -- 2017 HT3, 2002 JW15, 2002 GA
G403Tony Evans in Portugal via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-K11 -- 2018 XG5
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2019-K11 -- 2019 JD6
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2019-K11 -- 2019 JK
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 May '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 JKNEODyS2014205323.07e-07-7.61-7.730NEODyS: "Based on 47 optical observations (of which 0 are rejected as outliers) from 2019-05-01.396 to 2019-05-10.557."
JPL Sentry17202053-205322.8949e-07-7.62-7.740JPL: Computed at 09:29 today Pacific time based on 45 observations spanning 9.1602 days (2019-May-01.39563 to 2019-May-10.555811). Diameter approximately 0.009 km. from weighted mean H=27.97.

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 22 May '19

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

2032Generated Traffic Report
2014Noted that NEODyS has updated its 2019 JK risk assessment - see above
1720Noted that JPL Sentry has updated its 2019 JK risk assessment - see above
Grabbed MPEC 2019-K11 - Daily Orbit Update - see above