Contents  on 20 May '17

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 20 May '17

One object reported inside ten LD

Today just one asteroidal object is reported traveling within ten lunar distances (LD) of Earth. 2017 HU49 outbound from 6.43 to 6.64 LD. Next up, radar target 2017 CS comes inside ten LD on May 26th.

This report was generated at 1853 UTC with follow-up in today's DOU MPEC for 2017 CS.



Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting on transient natural objects that approach the actually significant 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 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 20 May '17

The MPC's NEO Confirmation Page has 71 listings

When last checked at 2323 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 71 objects listed. Of these, 22 were "one nighters." So far The Tracking News has counted a total of 74 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 20 May '17

Minor Planet Electronic Circulars

As of last check at 2323 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 20 May '17 >>  MPEC 2017-K15 - "12:03 UT" - Daily Orbit Update

Observers  on 20 May '17

Nineteen observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 17 in MPEC 2017-K15 -- 2017 JW1, 2017 JU1, 2017 JN2, 2017 HY50, 2017 HV3, 2017 HN3, 2017 HK1, 2017 GQ5, 2017 GB8, 2017 FW64, 2017 FM128, 2017 FJ90, 2016 MK1, 2016 AH193, 2011 GL44, 162452, 138404
T05ATLAS Haleakala in Hawaii, 12 in MPEC 2017-K15 -- 2016 LJ49, 2005 GL9, 475665, 474179, 405427, 39796, 260141, 190166, 175189, 100926, 5653, 5604
T08ATLAS Mauna Loa in Hawaii, 5 in MPEC 2017-K15 -- 456651, 222073, 163696, 154144, 11398
160Castelmartini Obs. in Italy, 15 in MPEC 2017-K15 -- 2011 ED78, 2005 GL9, 68950, 66391, 475665, 416584, 222073, 190166, 163696, 142561, 137170, 100926, 7888, 2102, 1917
703Catalina Sky Survey (CSS) in Arizona, 8 in MPEC 2017-K15 -- 54789, 456651, 222073, 154144, 142561, 136582, 3103, 2329
G58Chabot Obs. in northern California, 2 in MPEC 2017-K15 -- 2017 JU1, 2017 JD3
W92MASTER OAFA Obs., 2 in MPEC 2017-K15 -- 2014 KF91, 136923
K95MASTER-II Sutherland in South Africa, 2 in MPEC 2017-K15 -- 2014 KF91, 1980
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPEC 2017-K15 -- 2017 FD65, 2016 YU10, 2013 CL118, 85275, 66400, 491007, 154144, 138155, 10636
J69North Obs. in England, 1 in MPEC 2017-K15 -- 2016 LJ49
Z80Northolt Branch Obs. in England, 1 in MPEC 2017-K15 -- 2005 GL9
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2017-K15 -- 2005 MO13
F51Pan-STARRS 1 (PS1) in Hawaii, 10 in MPEC 2017-K15 -- 2017 JB, 2017 GU6, 2014 KF91, 2004 JR, 490791, 480934, 222073, 220124, 136923, 3908
K14Sencelles Obs. in Spain, 1 in MPEC 2017-K15 -- 2017 CS
W77Skyledge Obs., 1 in MPEC 2017-K15 -- 4503
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-K15 -- 2017 HY50
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2017-K15 -- 467460
I52Steward Obs. Mt. Lemmon Station in Arizona, 4 in MPEC 2017-K15 -- 2017 JB, 2017 HY50, 2017 HN3, 2016 LJ49
926Tenagra II Obs. in Arizona, 3 in MPEC 2017-K15 -- 2016 JH12, 416584, 142561
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 May '17

At last check (NEODyS at 2323 UTC) there was no risk monitoring news to report yet today. Visit the CRT to view activity in the last four weeks and our ephemerides page for a complete list of risk-rated objects under current observation or having recent news.

Chronology  on 20 May '17

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

1853Generated Traffic Report
1632Grabbed MPEC 2017-K15 - Daily Orbit Update - see above