Contents on 2 March '18
- Traffic Report -- ten objects
- IAU Minor Planet Center
- Observers -- five observers
- Impact Risk Monitoring -- one object
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 913 risk-listed objects, 48 have had news in the last 31 days. Updated at 2325 UTC on 2 March.
- 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 2 March '18
Ten objects reported inside ten LD
Ten asteroids are known to be within ten lunar distances (LD) of Earth today. Nearest is intruder 2018 DV1, which began the day at 0.45 LD from Earth, passed us at 0.29 LD at 0553 LD, and will end the day just outside the Earth-Moon system at 1.09 LD.
|Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41, 5.0 & 10.0 LD boundaries|
|Earth passage||I D||~Size||Distance today||Inside ten LD||Notes|
|0.29 LD today||2018 DV1||7 m||0.29 LD||Feb. 22 - March 9||intruder today, NHATS target, Earth closest at 0553 UTC|
|0.74 LD Feb. 25||2018 DU||8 m||4.23 to 5.19 LD||Feb. 15 - March 7||intruder, NHATS target|
|2.29 LD Feb. 25||2018 DR||11 m||8.01 to 9.52 LD||Feb. 18 - tomorrow||NHATS target|
|3.76 LD March 7||2017 VR12||276 m||7.17 from 8.40 LD||Feb. 28 - March 13||radar/NHATS target|
|3.87 LD yesterday||2018 DW1||15 m||4.72 to 6.67 LD||Feb. 25 - March 4|
|4.18 LD Feb. 27||2018 DT||13 m||4.50 to 4.74 LD||Feb. 11 - March 15||NHATS target|
|5.09 LD today||2018 DU1||9 m||5.09 LD||Feb. 24 - March 8||NHATS target, Earth closest at 1137 UTC, risk|
|5.44 LD Feb. 27||2018 CU14||10 m||5.99 to 6.45 LD||Feb. 19 - March 8||NHATS target|
|6.66 LD Jan. 15||2018 AV2||6 m||9.87 to 10.01 LD||Nov. 10 - today||NHATS target, exits ten LD, natural? - DOU|
|9.27 LD tomorrow||2018 DC||39 m||9.36 from 9.78 LD||yesterday - March 5||NHATS target|
This report was generated at 1910 UTC with astrometry from February in today's DOU MPEC for 2018 AV2, which today leaves our ten-LD reporting zone, finishing an unusual traverse that began last November 10th.
|Approaching Traffic - sorted by 10-LD bubble entry date|
|Earth passage||I D||~Size||Distance today||Inside ten LD||Notes|
|6.9 LD March 10*||2015 DK200||26 m||14.7 from 16.3 LD||March 6 - 14||EPU +/- 23.45 hours*, NHATS target|
|9.1 LD March 27*||2018 DH1||208 m||83.4 from 87.1 LD||March 26 - 28||EPU +/- 8.45 hours*|
|* EPU = Earth passage uncertainty|
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 2 March '18
The MPC's NEO Confirmation Page has 34 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 34 objects listed. Of these, eight were "one nighters." So far The Tracking News has counted a total of 42 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 2 March '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
- K18A02V 2018 AV2 (arc=62 days, H=28.7 ~6m, NHATS target) from Pan-STARRS 1 (PS1) (Feb. 12.47-50p3)
- Observation campaigns (NHATS targets, radar support)
- K18C03Q 2018 CQ3 (arc=156 days, H=25.2 ~31m, NHATS) from PS1 (2017 Sept. 22.47-49p2 at G=22.2-5, 2017 Nov. 7.40p1 at G=22.1, 2017 Nov. 9.30-33p4 at G=21.7-22.3 & Jan. 8.27-31p3 at G=21.0-2)
- K17B29D 2017 BD29 (arc=2 opp, H=21.7 ~155m, NHATS) from UH/Tholen NEO Follow-Up 2.24m Telescope (Feb. 13.61p2 at G=22.51-56)
-- NHATS target table
- Observations of other objects
- k5166 465166 2007 EL from NEAT's GEODSS Haleakala telescope (1996 March 17.37-41p3 & 1996 March 20.44-48p3)
- R6033 276033 2002 AJ129 from M. Kumrucu-Lohmiller via Slooh.com Chile Obs. (Feb. 8.21-25p4)
- Q5196 265196 2004 BW58 from NEAT's USAF Haleakala telescope (2004 Jan. 19.59-61p3)
- E3992 143992 2004 AF from NEAT/Hawaii (1995 Dec. 25.61-65p3)
- 99248 99248 2001 KY66 from NEAT/Hawaii (2001 May 30.26-28p3)
Observers on 2 March '18
Five observers appear in today's MPEC.
|Code||Observer / observatory|
|566||NEAT's GEODSS Haleakala telescope in Hawaii, 2 in MPEC 2018-E03 -- 465166, 143992|
|608||NEAT's USAF Haleakala telescope in Hawaii, 2 in MPEC 2018-E03 -- 99248, 265196|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 2 in MPEC 2018-E03 -- 2018 CQ3, 2018 AV2|
|W885||M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2018-E03 -- 276033|
|T12||UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-E03 -- 2017 BD29|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 2 March '18
Notes for Today's Latest Risk Assessments
|2008 EK68||JPL Sentry||1900||2019-2117||243||3.2079547e-06||-7.65||-8.70||0||JPL: Computed at 23:08 April 6th of 2017 Pacific time based on 10 observations spanning .04006 days (2008-Mar-05.4406 to 2008-Mar-05.48066). Diameter approximately 0.004 km. from weighted mean H=29.76.|
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.