Contents on 17 May '19
- Traffic Report -- ten objects
- IAU Minor Planet Center
- Observers -- one observer
- Impact Risk Monitoring -- one object
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 1041 risk-listed objects, 25 have had news in the last 31 days. Updated at 1631 UTC on 17 May.
- 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 17 May '19
Ten objects reported inside ten LD
There are ten minor objects reported inside ten lunar distances (LD) of our home world today. The closest are risk-listed intruder 2019 JH7, which exits Earth's sphere of gravitational influence as it travels outward from 2.06 to 4.10 LD, and 2012 KT12, which comes its closest to Earth this time around -- 4.14 LD.
|Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41, 5.0 & 10.0 LD boundaries|
|0.19 LD yesterday||2019 JH7||4 m||2.06 to 4.10 LD||May 11 - 20||intruder, NHATS target, exits Earth SOI, risk|
|2.34 LD May 13||2019 JW5||12 m||8.16 to 10.66 LD||May 10 - 17||exits ten LD|
|2.48 LD May 20||2019 JL3||36 m||5.18 from 6.97 LD||May 15 - 25|
|3.15 LD May 13||2019 JK3||15 m||8.02 to 10.26 LD||May 9 - 17||exits ten LD|
|4.14 LD today||2012 KT12||19 m||4.14 LD||May 7 - 27||NHATS target, Earth closest at 1440 UTC|
|4.43 LD yesterday||2019 JN5||27 m||5.31 to 7.36 LD||May 12 - 19|
|4.69 LD April 27||2019 GF1||10 m||9.15 to 9.51 LD||April 7 - May 19||NHATS target|
|5.56 LD today||2019 JG1||16 m||5.56 LD||May 12 - 21||NHATS target, Earth closest at 0154 UTC|
|6.09 LD today||2019 GT1||34 m||6.09 LD||May 8 - 26||NHATS target, Earth closest at 2338 UTC|
|7.04 LD May 15||2019 JN2||25 m||7.61 to 8.30 LD||May 10 - 19||NHATS target|
This report was generated at 1720 UTC.
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 17 May '19
The MPC's NEO Confirmation Page has 48 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 48 objects listed. Of these, seven were "one nighters." So far The Tracking News has counted a total of 53 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 17 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.
- Observations of risk-listed objects
- K06Q89V 2006 QV89 (small asteroid, arc=10 days, H=25.5 ~27m, NHATS target) from Great Shefford Obs. (2006 Aug. 29.93-94p3)
Observers on 17 May '19
One observer appears in today's MPEC.
|Code||Observer / observatory|
|J95||Great Shefford Obs. in England, 1 in MPEC 2019-K04 -- 2006 QV89|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 17 May '19
Notes for Today's Latest Risk Assessments
|2006 QV89||JPL Sentry||1630||2019-2117||15||0.000169674383||-1.93||-1.93||0||JPL: Computed at 09:10 today Pacific time based on 69 observations spanning 9.8617 days (2006-Aug-29.30747 to 2006-Sep-08.16918) including radar (1 Doppler).. Diameter approximately 0.029 km. from weighted mean H=25.32.|
|NEODyS||1630||2019-2117||20||1.06e-04||-3.74||-3.75||0||NEODyS: "Based on 70 optical observations (of which 0 are rejected as outliers) from 2006-08-29.308 to 2006-09-08.170."|
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 17 May '19
Times are UTC for when items were noted or added by The Tracking News.
|1720||Generated Traffic Report|
|1630||Noted that JPL Sentry has updated its 2006 QV89 risk assessment - see above|
Noted that NEODyS has updated its 2006 QV89 risk assessment - see above
|1600||Grabbed MPEC 2019-K04 - Daily Orbit Update - see above|