Contents on 9 June '17
- Traffic Report -- four objects
- IAU Minor Planet Center
- Observers -- nine observers
- Impact Risk Monitoring -- nothing to report
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 779 risk-listed objects, 37 have had news in the last 31 days. Updated at 1454 UTC on 9 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 9 June '17
Four objects reported inside ten LD
Four is today's count of asteroids passing through a "bubble" of space defined by ten lunar distances (LD) from Earth's center. Risk-listed 2017 LD is the nearest, outbound from 4.84 to 5.72 LD.
|Earth passage||I D||~Size||Distance Today||Notes|
|1.02 LD June 6||2017 KQ27||23 m||5.78 to 8.14 LD||risk|
|1.90 LD May 24||2017 KJ32||6 m||8.76 to 9.29 LD||risk|
|2.99 LD June 5||2017 LD||10 m||4.84 to 5.72 LD||risk|
|5.18 LD June 7||2017 LE||18 m||6.47 to 7.83 LD|
This report was generated at 1826 UTC with follow-up in today's DOU MPEC for departed radar targets 2017 CS and 418094 2007 WV4.
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 9 June '17
The MPC's NEO Confirmation Page has 16 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had sixteen objects listed. Of these, one was a "one nighter."
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 9 June '17
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
- K17C00S 2017 CS (Q=4.199 AU, arc=139 days, H=19.9 ~355m, radar support) from Landehen Obs. (June 4.92p1 & 4.98p1) and Castelmartini Obs. (June 7.99p3)
- f8094 418094 2007 WV4 (radar support) from Landehen Obs. (June 4.95-99p5), Castelmartini Obs. (June 8.83-84p3), and Tenagra II Obs. (June 9.23-24p3)
- Observation campaigns (NHATS targets, radar support)
- G3696 163696 2003 EB50 (radar) from Castelmartini Obs. (June 8.88p3)
- 11398 11398 1998 YP11 (radar) from Landehen Obs. (June 4.93-99p3), ATLAS Mauna Loa (June 8.44-49p4), and Castelmartini Obs. (June 8.82-83p3)
- 06063 6063 Jason (1984 KB) (radar) from Astronomical Research Obs. Westfield (June 8.12-13p5) and GiaGa Obs. (June 8.94-96p2)
- 02102 2102 Tantalus (1975 YA) (radar) from Castelmartini Obs. (June 7.99p3)
-- Planetary radar schedules: Arecibo & Goldstone
- Observations of small asteroids (H>22.0)
- K17L00G 2017 LG (arc=5 days, H=24.9 ~35m) from Tenagra II Obs. (June 8.42p3)
- Observations of other objects
- K17J03D 2017 JD3 (arc=13 days, H=21.7 ~155m) from UH/Tholen NEO Follow-Up 2.24m Telescope (May 27.24p2)
- K17H50Y 2017 HY50 (Q=4.372 AU, arc=39 days, H=20.0 ~339m) from GiaGa Obs. (June 8.89-92p2)
- K17G06Q 2017 GQ6 (arc=64 days, H=18.8 ~589m) from M57 Obs. (June 8.97-99p2)
- K11E78D 2011 ED78 (Q=5.329 AU, arc=2 opp, H=18.3 ~741m) from Castelmartini Obs. (June 8.90p3) and GiaGa Obs. (June 8.93-95p2)
- f6584 416584 2004 JB12 from Castelmartini Obs. (June 7.97-98p3) and Tenagra II Obs. (June 9.27-29p3)
- J0166 190166 2005 UP156 from ARO Westfield (June 8.18p5)
- E2561 142561 2002 TX68 from Castelmartini Obs. (June 7.98p3)
- E2040 142040 2002 QE15 from Castelmartini Obs. (June 7.97p3) and ARO Westfield (June 8.26-27p3)
- E1056 141056 2001 XV4 from ARO Westfield (June 8.32p3)
- D8846 138846 2000 VJ61 from Cordoba Obs. (June 8.04-05p3) and Tenagra II Obs. (June 9.28-29p9)
- A6589 106589 2000 WN107 from ARO Westfield (June 8.29-30p6) and Tenagra II Obs. (June 9.32-35p3)
- 86819 86819 2000 GK137 from Tenagra II Obs. (June 9.43-44p3)
- 66391 66391 1999 KW4 from ATLAS Mauna Loa (June 8.51-57p4) and Castelmartini Obs. (June 8.84-85p3)
Observers on 9 June '17
Nine observers appear in today's MPEC.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 5 in MPEC 2017-L55 -- 190166, 142040, 141056, 106589, 6063|
|T08||ATLAS Mauna Loa in Hawaii, 2 in MPEC 2017-L55 -- 66391, 11398|
|160||Castelmartini Obs. in Italy, 10 in MPEC 2017-L55 -- 2017 CS, 2011 ED78, 66391, 418094, 416584, 163696, 142561, 142040, 11398, 2102|
|822||Cordoba Obs. in Argentina, 1 in MPEC 2017-L55 -- 138846|
|203||GiaGa Obs. in Italy, 3 in MPEC 2017-L55 -- 2017 HY50, 2011 ED78, 6063|
|Z43||Landehen Obs., 3 in MPEC 2017-L55 -- 2017 CS, 418094, 11398|
|K38||M57 Obs. in Italy, 1 in MPEC 2017-L55 -- 2017 GQ6|
|926||Tenagra II Obs. in Arizona, 6 in MPEC 2017-L55 -- 2017 LG, 86819, 418094, 416584, 138846, 106589|
|T12||UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-L55 -- 2017 JD3|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 9 June '17
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.