Contents on 14 June '19
- Traffic Report -- five objects
- IAU Minor Planet Center
- Observers -- twelve observers
- Impact Risk Monitoring -- two objects
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 1054 risk-listed objects, 34 have had news in the last 31 days. Updated at 1530 UTC on 14 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 14 June '19
Five objects reported inside ten LD
Five asteroidal objects have been reported inside ten lunar distances (LD) of our home world today. Nearest of these is 2019 LU, which is inbound from 6.09 to 4.92 LD. There are likely other close-passers not yet announced by the Minor Planet Center due to a major service interruption.
|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|
|3.94 LD June 6||2019 KA3||8 m||7.79 to 8.53 LD||May 26 - June 16||NHATS target - DOU|
|4.1 LD June 16*||2019 LU||33 m||4.9 from 6.1 LD||June 11 - 21||EPU +/- 10 mins.* - DOU, DOU|
|5.6 LD today*||2019 LL1||14 m||5.6 LD||June 10 - 18|| EPU +/- 6 mins.* (old data), |
Earth closest at 1205 UTC - DOU
|6.4 LD June 20*||2019 LB2||14 m||7.4 from 7.8 LD||June 9 - 30||EPU +/- 13 mins.*, NHATS target|
|9.09 LD June 12||2019 LB||31 m||9.29 to 9.66 LD||June 9 - 15||NHATS target - DOU|
|Approaching - sorted by 10-LD bubble entry date|
|Earth passage||I D||~Size||Distance today||Inside ten LD||Notes|
|9.7 LD June 23*||2019 LM1||24 m||18.6 from 20.3 LD||June 21 - 24||EPU +/- 15 mins.*|
|7.63 LD June 24||441987 2010 NY65||170 m||28.91 from 31.75 LD||June 22 - 26||radar target|
|5.2 LD June 29*||2019 LV1||25 m||21.4 from 22.8 LD||June 23 - July 6||EPU +/- 2.58 hours*, NHATS target|
|* EPU = Earth passage uncertainty|
This report was generated at 2305 UTC to report on DOU MPECs issued yesterday and today. Yesterday's has follow-up for inbound 2019 LU, passing 2019 LL1, outbound objects 2019 LB and 2019 KA3, and departed objects 2019 KN2 and risk-listed 2019 LA2, plus astrometry from May for 2019 JK3, 2019 JV1, 2019 JG1, 2019 JM, and 2012 KT12. (At last check JPL Horizons had not yet updated with the new data for 2019 LA2 and 2019 LL1.) Today's DOU has follow-up for inbound 2019 LU and departed 2019 JU5.
The MPC Status Page extended yesterday's statement to include, "We are working as quickly as possible to re-establish the remaining MPEC processes under linux rather than VMS. This includes MPECs designating new objects." And today the page explained that "We are now beta-testing the designation of non-NEO and NEO objects currently on the NEOCP. We anticipate that the release of MPECs for NEOs currently on the NEOCP will take place over the course of June 14th and June 15th."
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 14 June '19
The MPC's NEO Confirmation Page has 200 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 200 objects listed. Of these, 27 were "one nighters." So far The Tracking News has counted a total of 212 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 14 June '19
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2019-L97 time-stamped "03:40 UT" - 2010 NA - see below
- MPEC 2019-L98 time-stamped "13:41 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K19L01Z 2019 LZ1 (q=0.164 AU, Q=4.423 AU, arc=14 days, H=19.8 ~371m) from Spacewatch via Kitt Peak Natl. Obs. (KPNO) (June 14.16p3)
- Observations of close-passing objects
- K19L00U 2019 LU (arc=34 days, H=25.0 ~34m) from ATLAS Haleakala (June 13.38-41p6) and ROASTERR-1 (June 13.90p2)
- K19J05U 2019 JU5 (arc=30 days, H=24.0 ~54m, NHATS target) from Pan-STARRS 2 (PS2) (June 8.38-41p3)
- Observation campaigns (NHATS targets, radar support)
- K19L01X 2019 LX1 (arc=11 days, H=24.5 ~43m, NHATS) from Steward Obs. Mt. Lemmon Station (June 14.42-43p4)
-- NHATS target table
- Observations of small asteroids (H>22.0)
- K19L00T 2019 LT (Q=4.388 AU, arc=14 days, H=23.4 ~71m) from Pan-STARRS 1 (PS1) (June 9.44-48p2) and Steward Mt. Lemmon Sta. (June 14.23-24p4)
- K19L00S 2019 LS (arc=8 days, H=23.9 ~56m) from PS2 (June 8.38-41p2)
- K19K00R 2019 KR (arc=14 days, H=23.9 ~56m) from PS2 (June 8.39-42p3)
- Observations of other objects
- K19K00P 2019 KP (Q=4.102 AU, arc=3 opp, H=19.8 ~371m) from PS2 (June 8.39-42p3)
- K19J07X 2019 JX7 (arc=31 days, H=21.5 ~170m) from PS2 (June 8.43-47p4) and ROASTERR-1 (June 13.89p2)
- K19J02W 2019 JW2 (arc=39 days, H=21.5 ~170m) from PS1 (June 9.42-44p3) and Steward Mt. Lemmon Sta. (June 14.35-36p3 at G=22.5)
- K19H00C 2019 HC (Q=4.140 AU, arc=58 days, H=17.3 ~1.17 km) from ROASTERR-1 (June 13.88-91p2)
- K19G03D 2019 GD3 (arc=70 days, H=20.8 ~234m) from program code "," (21) via Slooh.com Canary Islands Obs. (June 12.09p2)
- K19E01Q 2019 EQ1 (arc=101 days, H=20.9 ~224m) from the Mt. Lemmon Survey (MLS) (June 8.16-18p4) and Steward Mt. Lemmon Sta. (June 14.29-30p2)
- K19A02V 2019 AV2 (Q=4.051 AU, arc=162 days, H=21.2 ~195m) from Spacewatch/KPNO (June 14.33-34p3)
- K18X05G 2018 XG5 (arc=177 days, H=20.2 ~309m) from PS2 (June 8.43-47p4)
- K16N22W 2016 NW22 (arc=4 opp, H=20.9 ~224m) from PS1 (June 8.37-40p4)
- K14H04O 2014 HO4 (arc=3 opp, H=19.3 ~467m) from PS2 (June 8.33-36p3)
- K14E49A 2014 EA49 (q=0.257 AU, arc=3 opp, H=20.0 ~339m) from PS2 (May 31.42-45p3 & June 7.32-36p3), Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (June 8.07-08p3 & 9.17-18p2), and Spacewatch/KPNO (June 12.33p2)
- K13L16G 2013 LG16 (arc=3 opp, H=19.3 ~467m) from PS1 (June 8.37-39p3)
- K08L16W 2008 LW16 (arc=2 opp, H=19.9 ~355m) from ATLAS Haleakala (June 8.56-58p4)
- n7025 497025 2003 QW30 from PS2 (June 8.53-55p3)
MPEC 2019-L97 - "03:40 UT" - 2010 NA
- K10N00A 2010 NA (H=20.6 ~257m) from PS1 (2013 Feb. 12.37-39p2, June 7.44p1 & 11.49-52p3), MLS (June 6.34-35p4), Steward Mt. Lemmon Sta. (June 6.42p4, 7.26p4, 8.24-25p4, 9.28p4, 11.30-31p4, 12.25-26p3 & 13.27p4), Holmes/CTIO (June 8.26p3), Visnjan Obs. (June 8.94-95p3), San Marcello Pistoiese Obs. (June 9.06p2), and the Spacewatch 0.9m telescope (June 10.28-29p3)
Observers on 14 June '19
Twelve observers appear in today's MPECs.
|Code||Observer / observatory|
|T05||ATLAS Haleakala in Hawaii, 2 in MPEC 2019-L98 -- 2019 LU, 2008 LW16|
|807|||Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2019-L97 & 2019-L98 -- 2014 EA49, 2010 NA|
|695^||Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 3 in MPEC 2019-L98 -- 2019 LZ1, 2019 AV2, 2014 EA49|
|G96||Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2019-L97 & 2019-L98 -- 2019 EQ1, 2010 NA|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2019-L97 & 2019-L98 -- 2019 LT, 2019 JW2, 2016 NW22, 2013 LG16, 2010 NA|
|F52||Pan-STARRS 2 (PS2) in Hawaii, 9 in MPEC 2019-L98 -- 2019 LS, 2019 KR, 2019 KP, 2019 JX7, 2019 JU5, 2018 XG5, 2014 HO4, 2014 EA49, 497025|
|L04||ROASTERR-1 in Romania, 3 in MPEC 2019-L98 -- 2019 LU, 2019 JX7, 2019 HC|
|104||San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2019-L97 -- 2010 NA|
|G40,||program code "," (21) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-L98 -- 2019 GD3|
|691||Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2019-L97 -- 2010 NA|
|I52||Steward Obs. Mt. Lemmon Station in Arizona, 5 in MPECs 2019-L97 & 2019-L98 -- 2019 LX1, 2019 LT, 2019 JW2, 2019 EQ1, 2010 NA|
|L01||Visnjan Obs., 1 in MPEC 2019-L97 -- 2010 NA|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 14 June '19
Notes for Today's Latest Risk Assessments
|2019 LA2||NEODyS||1502||2073-2117||21||4.09e-06||-6.31||-6.79||0||NEODyS: "Based on 29 optical observations (of which 2 are rejected as outliers) from 2019-06-04.234 to 2019-06-05.191."|
|2019 LZ1||NEODyS||1530||R E M O V E D||-|
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 14 June '19
Times are UTC for when items were noted or added by The Tracking News.
|2305||Generated Traffic Report|
|1530||Noted that NEODyS has removed 2019 LZ1 as an impact risk - see above|
|1502||Noted that NEODyS has updated its 2019 LA2 risk assessment - see above|
Grabbed MPEC 2019-L98 - Daily Orbit Update - see above
|0531||Grabbed MPEC 2019-L97 - 2010 NA - see above|