Contents on 1 June '18
- Traffic Report -- one object
- IAU Minor Planet Center
- Observers -- fourteen observers
- Impact Risk Monitoring -- nothing to report
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 934 risk-listed objects, 48 have had news in the last 31 days. Updated at 1602 UTC on 1 June.
- Ephemerides for risk-listed objects & close passers
- News archive (old) & news image catalog (discontinued)
- Object Links - mainly for radar targets & close passers (mostly discontinued)
- Observing Campaigns (old)
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 1 June '18
One object reported inside ten LD
One asteroidal object is known to be less than ten lunar distances (LD) from our planet today. 2018 KN2 heads out from 7.44 to 8.60 LD.
|Earth passage||I D||~Size||Distance today||Inside ten LD||Notes|
|6.10 LD May 29||2018 KN2||27 m||7.44 to 8.60 LD||May 25 - June 3|
|Approaching (sorted by 10-LD bubble entry date)|
|5.56 LD June 10||2018 EJ4||186 m||13.44 from 14.71 LD||June 4 - 16||radar/NHATS target - DOU|
|8.96 LD June 11||2015 DP155||162 m||12.76 from 13.47 LD||June 6 - 15||NHATS target|
This report was generated at 1725 UTC with follow-up in today's DOU MPEC for approaching 2018 EJ4.
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 1 June '18
The MPC's NEO Confirmation Page has 4 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four objects listed. Of these, one was a "one nighter." So far The Tracking News has counted a total of six 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 1 June '18
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.
- Observations of close-passing objects
- K18E04J 2018 EJ4 (arc=80 days, H=21.3 ~186m, NHATS target, radar support) from ATLAS Mauna Loa (May 31.43-47p4), Bernezzo Obs. (May 31.89-90p3), and M57 Obs. (May 31.96-99p3)
- Observation campaigns (NHATS targets, radar support)
- 05604 5604 1992 FE (radar) from ATLAS Haleakala (May 31.30-32p4)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
- Observations of small asteroids (H>22.0)
- K18H03U 2018 HU3 (arc=1 day, H=28.1 ~8m) from the Mt. Lemmon Survey (MLS) (April 23.22-24p4 first detection), Magdalena Ridge Obs. (MRO) (April 23.28-30p4), and Steward Obs. Mt. Lemmon Station (April 23.34p4 & 24.17p4)
- K18H01Q 2018 HQ1 (arc=32 days, H=24.4 ~45m) from UH/Tholen NEO Follow-Up 2.24m Telescope (May 23.56-57p5)
- K18G04A 2018 GA4 (arc=40 days, H=23.1 ~81m) from Astronomical Research Obs. Westfield (May 23.31-34p3 at V=22.3-8)
- K16L49J 2016 LJ49 (arc=3 opp, H=22.2 ~123m) from the Spacewatch 1.8m telescope (June 1.21-22p3)
- Observations of other objects
- K18K01M 2018 KM1 (q=0.356 AU, arc=7 days, H=20.8 ~234m) from Harlingten Research Obs. (May 25.15p3)
- K18J03K 2018 JK3 (i=43.2°, arc=13 days, H=21.7 ~155m) from Harlingten Research Obs. (May 25.13-14p3)
- K18E04D 2018 ED4 (Q=4.307 AU, arc=83 days, H=19.4 ~446m) from Spacewatch 1.8m (June 1.16-17p2 at R=22.1)
- K17U45E 2017 UE45 (Q=4.731 AU, arc=2 opp, H=18.8 ~589m) from Spacewatch 1.8m (June 1.19-20p2)
- K15X55P 2015 XP55 (i=42.2°, arc=2 opp, H=21.6 ~162m) from ARO Westfield (May 23.22p1 at V=22.4 & 23.27p2 at V=22.2)
- p8507 518507 2006 EE1 from ARO Westfield (May 23.27-31p3 at V=22.1-4)
- p3497 513497 2009 HB82 from ATLAS Haleakala (May 31.31-34p4)
- n4999 494999 2010 JU39 from Pan-STARRS 1 (PS1) (May 31.38-42p3)
- l5967 475967 2007 JF22 from ATLAS Haleakala (May 31.35-39p8)
- e5212 405212 2003 QC10 from ATLAS Haleakala (May 31.29-31p4)
- G4121 164121 2003 YT1 from ATLAS Haleakala (May 31.31-33p4)
- G3243 163243 2002 FB3 from ATLAS Mauna Loa (May 31.25-27p5)
- G2168 162168 1999 GT6 from ATLAS Haleakala (May 31.52-55p4)
- 66391 66391 1999 KW4 from Grorudalen Obs. (May 29.96-97p3 & 30.93-94p3), ATLAS Mauna Loa (May 31.50-52p4), and West Park Obs. (May 31.92-97p4)
- 36183 36183 1999 TX16 from ATLAS Haleakala (May 31.42-46p5)
- 25916 25916 2001 CP44 from ATLAS Haleakala (May 31.50-53p4)
- 15745 15745 Yuliya (1991 PM5) from ATLAS Mauna Loa (May 31.49-53p4)
- 01685 1685 Toro (1948 OA) from ATLAS Haleakala (May 31.40-44p7)
- 01627 1627 Ivar (1929 SH) from ATLAS Mauna Loa (May 31.42-45p4)
- 01036 1036 Ganymed (1924 TD) from ATLAS Haleakala (May 31.34-36p7)
Observers on 1 June '18
Fourteen observers appear in today's MPEC.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 3 in MPEC 2018-L01 -- 2018 GA4, 2015 XP55, 518507|
|T05||ATLAS Haleakala in Hawaii, 10 in MPEC 2018-L01 -- 513497, 475967, 405212, 36183, 25916, 164121, 162168, 5604, 1685, 1036|
|T08||ATLAS Mauna Loa in Hawaii, 5 in MPEC 2018-L01 -- 2018 EJ4, 66391, 163243, 15745, 1627|
|C77||Bernezzo Obs. in Italy, 1 in MPEC 2018-L01 -- 2018 EJ4|
|238||Grorudalen Obs. in Norway, 1 in MPEC 2018-L01 -- 66391|
|G48||Harlingten Research Obs. in New Mexico, 2 in MPEC 2018-L01 -- 2018 KM1, 2018 JK3|
|K38||M57 Obs. in Italy, 1 in MPEC 2018-L01 -- 2018 EJ4|
|H01||Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2018-L01 -- 2018 HU3|
|G96||Mt. Lemmon Survey in Arizona, 1 in MPEC 2018-L01 -- 2018 HU3|
|F51||Pan-STARRS 1 in Hawaii, 1 in MPEC 2018-L01 -- 494999|
|291||Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2018-L01 -- 2018 ED4, 2017 UE45, 2016 LJ49|
|I52||Steward Obs. Mt. Lemmon Station in Arizona, 1 in MPEC 2018-L01 -- 2018 HU3|
|T12||UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-L01 -- 2018 HQ1|
|Z92||West Park Obs. in England, 1 in MPEC 2018-L01 -- 66391|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 1 June '18
At last check (NEODyS at 2358 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.