Contents on 20 May '19
- Traffic Report -- five objects
- IAU Minor Planet Center
- Observers -- four observers
- Impact Risk Monitoring -- three objects
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 1041 risk-listed objects, 26 have had news in the last 31 days. Updated at 2302 UTC on 20 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 20 May '19
Five objects reported inside ten LD
There are five minor planets reported within ten lunar distances (LD) of our home world today. Nearest is 2019 JL3, which comes its closest to Earth this time around, reaching 2.48 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|
|0.19 LD May 16||2019 JH7||4 m||8.19 to 10.24 LD||May 11 - 20||intruder, NHATS target, exits ten LD, risk|
|2.48 LD today||2019 JL3||36 m||2.48 LD||May 15 - 25||Earth closest at 0732 UTC - DOU|
|4.14 LD May 17||2012 KT12||19 m||4.65 to 5.12 LD||May 7 - 27||NHATS target|
|5.56 LD May 17||2019 JG1||16 m||7.67 to 9.02 LD||May 12 - 21||NHATS target|
|6.09 LD May 17||2019 GT1||34 m||6.35 to 6.65 LD||May 8 - 26||NHATS target|
This report was generated at 1810 UTC with follow-up in today's DOU MPEC for outbound 2019 JL3 and for departed risk-listed objects 2019 JO1 (first follow-up, 6.25 days added to 1.95-day discovery arc) and 2019 GS19, .
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 20 May '19
The MPC's NEO Confirmation Page has 43 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 43 objects listed. Of these, one was a "one nighter." So far The Tracking News has counted a total of 44 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 '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
- K19J01O 2019 JO1 (small asteroid, arc=8 days, H=27.2 ~12m, close passer) from UH/Tholen NEO Follow-Up 2.24m Telescope (May 10.52p1 at G=23.72)
- K19G19S 2019 GS19 (small asteroid, arc=29 days, H=25.6 ~26m, close passer) from Tholen 2.24m (May 10.46p1 at G=23.24)
- Observations of close-passing objects
- K19J03L 2019 JL3 (arc=9 days, H=24.9 ~35m) from Castelmartini Obs. (May 16.91p3)
- Observations of other objects
- K19H00C 2019 HC (Q=4.140 AU, arc=30 days, H=17.4 ~1.12 km) from Castelmartini Obs. (May 16.92p3)
- K15Q03O 2015 QO3 (q=0.331 AU, Q=4.185 AU, arc=3 opp, H=19.4 ~446m) from SATINO-1 (May 11.85-88p4)
- F3814 153814 2001 WN5 from Geyserland Obs. (May 19.44-45p2)
- E1593 141593 2002 HK12 from Geyserland Obs. (May 19.42-43p2)
- 05693 5693 1993 EA from Geyserland Obs. (May 19.39-41p2)
Observers on 20 May '19
Four observers appear in today's MPEC.
|Code||Observer / observatory|
|160||Castelmartini Obs. in Italy, 2 in MPEC 2019-K09 -- 2019 JL3, 2019 HC|
|E89||Geyserland Obs. in New Zealand, 3 in MPEC 2019-K09 -- 153814, 141593, 5693|
|C95||SATINO-1 in France, 1 in MPEC 2019-K09 -- 2015 QO3|
|T12||UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2019-K09 -- 2019 JO1, 2019 GS19|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 20 May '19
Notes for Today's Latest Risk Assessments
|2019 JO1||JPL Sentry||1600||2044-2052||6||3.3883107e-05||-5.17||-5.20||0||JPL: Computed at 08:08 today Pacific time based on 23 observations spanning 8.1949 days (2019-May-02.32636 to 2019-May-10.521282). Diameter approximately 0.012 km. from weighted mean H=27.25.|
|NEODyS||1600||2044-2053||8||1.36e-06||-6.58||-6.61||0||NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2019-05-02.327 to 2019-05-10.522."|
|2019 GS19||JPL Sentry||1600||2102-2102||1||9.455e-08||-7.49||-7.49||0||JPL: Computed at 07:59 today Pacific time based on 62 observations spanning 29.075 days (2019-Apr-11.38728 to 2019-May-10.461894). Diameter approximately 0.025 km. from weighted mean H=25.64.|
|NEODyS||1600||2069-2102||3||2.84e-07||-6.95||-7.06||0||NEODyS: "Based on 64 optical observations (of which 5 are rejected as outliers) from 2019-04-11.388 to 2019-05-10.463."|
|2006 QV89||JPL Sentry||2300||2019-2117||15||0.000154262101||-1.91||-1.91||0||JPL: Computed at 15:10 today Pacific time based on 62 observations spanning 9.8617 days (2006-Aug-29.30747 to 2006-Sep-08.16918) including radar (1 Doppler).. Diameter approximately 0.030 km. from weighted mean H=25.23.|
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 20 May '19
Times are UTC for when items were noted or added by The Tracking News.
|2300||Noted that JPL Sentry has updated its 2006 QV89 risk assessment - see above|
|1810||Generated Traffic Report|
|1600||Noted that JPL Sentry has updated its 2019 GS19 risk assessment - see above|
Noted that NEODyS has updated its 2019 GS19 risk assessment - see above
Noted that JPL Sentry has updated its 2019 JO1 risk assessment - see above
Noted that NEODyS has updated its 2019 JO1 risk assessment - see above
Grabbed MPEC 2019-K09 - Daily Orbit Update - see above