Contents on 22 May '19
- Traffic Report -- three objects
- IAU Minor Planet Center
- Observers -- ten observers
- Impact Risk Monitoring -- one object
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 2014 UTC on 22 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 22 May '19
Three objects reported inside ten LD
Three small Solar-System bodies are known to be less than ten lunar distances (LD) from Earth today, all outbound and none of them closer than 4.14 LD.
|Neighborhood Traffic - sorted by Earth passage distance, grouped by 2.41, 5.0 & 10.0 LD boundaries|
|Earth passage||I D||~Size||Distance today||Inside ten LD||Notes|
|2.48 LD May 20||2019 JL3||36 m||4.14 to 5.84 LD||May 15 - 25|
|4.14 LD May 17||2012 KT12||19 m||5.69 to 6.32 LD||May 7 - 27||NHATS target|
|6.09 LD May 17||2019 GT1||34 m||7.06 to 7.54 LD||May 8 - 26||NHATS target|
This report was generated at 2032 UTC with first follow-up for departed 2019 JD6 (9.42 days added to its 5.48-day discovery arc) in today's DOU MPEC along with continuing follow-up for dimming risk-listed 2019 JK.
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 22 May '19
The MPC's NEO Confirmation Page has 41 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 41 objects listed. Of these, four were "one nighters." 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 22 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
- K19J00K 2019 JK (small asteroid, arc=9 days, H=28.0 ~9m, close passer) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (May 5.26-29p3 at G=22.6-7) and UH/Tholen NEO Follow-Up 2.24m Telescope (May 10.56p1 at G=24.62)
- Observations of recently (no longer) risk-listed objects
- K19J01L 2019 JL1 (small asteroid, arc=19 days, H=22.5 ~107m) from Holmes/CTIO (May 21.11-12p3)
- Observations of close-passing objects
- K19J06D 2019 JD6 (arc=15 days, H=24.6 ~41m, NHATS target) from the Spacewatch 0.9m telescope (May 22.44-46p3)
- Observation campaigns (NHATS targets, radar support)
- K19J01F 2019 JF1 (arc=13 days, H=23.8 ~59m, NHATS) from Holmes/CTIO (May 14.25-26p3)
- K19G05P 2019 GP5 (arc=39 days, H=24.7 ~39m, NHATS) from Holmes/CTIO (May 14.17-18p3)
-- NHATS target table
- Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
- K19J01C 2019 JC1 (Q=4.109 AU, arc=13 days, H=24.6 ~41m) from Holmes/CTIO (May 14.28-29p3 at V=22.0-22.1)
- K19H00O 2019 HO (arc=21 days, H=23.9 ~56m) from Holmes/CTIO (May 14.15-16p3)
- K19G21J 2019 GJ21 (arc=30 days, H=23.9 ~56m) from Holmes/CTIO (May 14.24-26p3)
- K17H03T 2017 HT3 (arc=2 opp, H=22.3 ~117m) from Schiaparelli Obs. (May 1.02-03p2)
- K19G19L 2019 GL19 (arc=42 days, H=22.0 ~135m) from Holmes/CTIO (May 14.23p2)
- Observations of other objects
- K19J01K 2019 JK1 (arc=19 days, H=20.0 ~339m) from Holmes/CTIO (May 21.09-10p3)
- K19H00C 2019 HC (Q=4.140 AU, arc=35 days, H=17.4 ~1.12 km) from Northolt Branch Obs. (May 20.96-97p7) and North Obs. (May 21.94-95p2)
- K19G19M 2019 GM19 (arc=35 days, H=21.2 ~195m) from Holmes/CTIO (May 14.19-21p3 at V=22.0-22.1)
- K18X05G 2018 XG5 (arc=160 days, H=20.1 ~323m) from Tony Evans via Slooh.com Canary Islands Obs. (May 22.09-12p3)
- K18X00V 2018 XV (arc=2 opp, H=19.9 ~355m) from Holmes/CTIO (May 5.31-33p3)
- K16K03R 2016 KR3 (arc=2 opp, H=21.0 ~214m) from SATINO-1 (April 29.83-84p3)
- K16GD5G 2016 GG135 (arc=2 opp, H=20.7 ~245m) from SATINO-1 (April 30.91-93p3)
- K08W32X 2008 WX32 (arc=3 opp, H=19.3 ~467m) from Northolt Branch Obs. (May 20.99p3)
- K02J15W 2002 JW15 (arc=8 opp, H=20.4 ~282m) from Schiaparelli Obs. (April 30.99p5)
- K02G00A 2002 GA (arc=3 opp, H=20.4 ~282m) from Schiaparelli Obs. (April 30.96-97p5)
- O4670 244670 2003 KN18 from Northolt Branch Obs. (May 20.94-95p4)
- B2221 112221 2002 KH4 from Northolt Branch Obs. (May 20.98-99p6)
- 01980 1980 Tezcatlipoca (1950 LA) from MASTER IAC Obs. (May 20.89p2) and MASTER OAFA Obs. (May 21.07-09p3)
Observers on 22 May '19
Ten observers appear in today's MPEC.
|Code||Observer / observatory|
|807|||Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 11 in MPEC 2019-K11 -- 2019 JL1, 2019 JK1, 2019 JK, 2019 JF1, 2019 JC1, 2019 HO, 2019 GP5, 2019 GM19, 2019 GL19, 2019 GJ21, 2018 XV|
|Z22||MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2019-K11 -- 1980|
|W92||MASTER OAFA Obs., 1 in MPEC 2019-K11 -- 1980|
|J69||North Obs. in England, 1 in MPEC 2019-K11 -- 2019 HC|
|Z80||Northolt Branch Obs. in England, 4 in MPEC 2019-K11 -- 2019 HC, 2008 WX32, 244670, 112221|
|C95||SATINO-1 in France, 2 in MPEC 2019-K11 -- 2016 KR3, 2016 GG135|
|204||Schiaparelli Obs. in Italy, 3 in MPEC 2019-K11 -- 2017 HT3, 2002 JW15, 2002 GA|
|G403||Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-K11 -- 2018 XG5|
|691||Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2019-K11 -- 2019 JD6|
|T12||UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2019-K11 -- 2019 JK|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 22 May '19
Notes for Today's Latest Risk Assessments
|2019 JK||NEODyS||2014||2053||2||3.07e-07||-7.61||-7.73||0||NEODyS: "Based on 47 optical observations (of which 0 are rejected as outliers) from 2019-05-01.396 to 2019-05-10.557."|
|JPL Sentry||1720||2053-2053||2||2.8949e-07||-7.62||-7.74||0||JPL: Computed at 09:29 today Pacific time based on 45 observations spanning 9.1602 days (2019-May-01.39563 to 2019-May-10.555811). Diameter approximately 0.009 km. from weighted mean H=27.97.|
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 22 May '19
Times are UTC for when items were noted or added by The Tracking News.
|2032||Generated Traffic Report|
|2014||Noted that NEODyS has updated its 2019 JK risk assessment - see above|
|1720||Noted that JPL Sentry has updated its 2019 JK risk assessment - see above|
Grabbed MPEC 2019-K11 - Daily Orbit Update - see above