Contents on 14 August '19
- Traffic Report -- two objects
- IAU Minor Planet Center
- Observers -- fourteen observers
- Impact Risk Monitoring -- two objects
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 1054 risk-listed objects, 72 have had news in the last 31 days. Updated at 1530 UTC on 14 Aug.
- 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 August '19
Two objects reported inside ten LD
Today there are two asteroids known to be traveling just inside ten lunar distances (LD) of Earth. 2019 PJ comes in from 10.83 to 9.31 LD and 2019 PS1 leaves from 9.67 to 11.85 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|
|2.01 LD Aug. 9||2019 PS1||15 m||9.67 to 11.85 LD||Aug. 5 - today||exits ten LD|
|8.74 LD Aug. 16||2019 PJ||57 m||9.31 from 10.83 LD||today - Aug. 17||enters ten LD|
|2.7 LD Aug. 28*||2019 OU1||91 m||40.0 from 43.0 LD||Aug. 25 - 31||Earth passage uncertainty +/- 22 mins.* - DOU|
This report was generated at 1812 UTC with first follow-up in today's DOU MPEC for departed 2019 PO1, expanding it's observation arc from 17.30 hours to 3.04 days. This slow passer is calculated with some uncertainty to have remained within ten LD of our planet from June 25th to August 3rd and is suspected to be human space junk or lunar ejecta. The DOU also has follow up for approaching 2019 OU1.
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 August '19
The MPC's NEO Confirmation Page has 22 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 22 objects listed. Of these, four were "one nighters." So far The Tracking News has counted a total of 30 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 August '19
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2019-P99 time-stamped "12:02 UT" - Daily Orbit Update - see below
- MPEC 2019-P100 time-stamped "12:22 UT" - 2019 PQ2 - see below
- MPEC 2019-P101 time-stamped "12:27 UT" - 2019 PR2 - see below
- MPEC 2019-P102 time-stamped "12:34 UT" - 2019 PS2 - see below
- MPEC 2019-P103 time-stamped "20:26 UT" - 2019 PV2
MPEC 2019-P103 - "20:26 UT" - 2019 PV2
- K19P02V 2019 PV2 (small asteroid, H=25.1 ~32m) was picked up at 1400 UT on 12 Aug. by Pan-STARRS 1 (PS1), observing it at Aug. 12.58-61p4 at w=21.6-22.1. This detection was confirmed by R. Wainscoat on Mauna Kea (Aug. 13.39-40p3 & 14.51p3).
MPEC 2019-P102 - "12:34 UT" - 2019 PS2
- K19P02S 2019 PS2 (H=21.6 ~162m) was picked up at 1209 UT on 12 Aug. by PS1, observing it at Aug. 11.62p1 at G=22.1, 12.51-53p3 at i=20.9-21.7, 12.63p1 at G=22.0, 13.51-53p3 at G=21.5-8, and 13.63p1 at G=21.9. This detection was confirmed by R. Wainscoat/Mauna Kea (Aug. 13.52p3).
MPEC 2019-P101 - "12:27 UT" - 2019 PR2
- K19P02R 2019 PR2 (Q=11.601 AU, H=19.0 ~537m) was picked up at 1426 UT on 10 Aug. by PS1, observing it at Aug. 10.60-62p4. This detection was confirmed by Visnjan Obs. (Aug. 11.01-02p5 & 12.01-02p8), Astronomical Research Obs. Westfield (Aug. 11.31-32p3 & 14.39p3), and R. Wainscoat/Mauna Kea (Aug. 11.57p3).
MPEC 2019-P100 - "12:22 UT" - 2019 PQ2
- K19P02Q 2019 PQ2 (small asteroid, H=23.9 ~56m) was picked up at 1243 UT on 13 Aug. by PS1, observing it at Aug. 11.62p1, 12.53p1, and 13.53-55p3. This detection was confirmed by ARO Westfield (Aug. 14.33-34p3).
- Observations of risk-listed objects
- K19P01O 2019 PO1 (small asteroid, arc=3 days, H=27.6 ~10m, close passer, NHATS target) from the Spacewatch 1.8m telescope (Aug. 12.41p3) and UH/Tholen NEO Follow-Up CFH Telescope (Aug. 12.57p3)
- K19L04R 2019 LR4 (small asteroid, arc=78 days, H=25.2 ~31m) from Tholen CFHT (Aug. 13.60-61p3 at G=23.69-24.25)
- Observations of close-passing objects
- K19O01U 2019 OU1 (arc=18 days, H=22.8 ~93m) from SATINO-1 (Aug. 9.94-95p2)
- Observation campaigns (NHATS targets, radar support)
- K19N01C 2019 NC1 (arc=36 days, H=21.6 ~162m, NHATS) from SONEAR (July 20.19-21p3)
-- NHATS target table
- Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
- K19O02A 2019 OA2 (arc=18 days, H=23.4 ~71m) from ARO Westfield (Aug. 8.28-29p5)
- K19O01T 2019 OT1 (arc=13 days, H=23.7 ~62m) from ARO Westfield (Aug. 8.23-25p2)
- K19O01O 2019 OO1 (arc=12 days, H=23.6 ~65m) from ARO Westfield (Aug. 8.37-39p2)
- K19J06X 2019 JX6 (Q=4.370 AU, arc=92 days, H=22.2 ~123m) from ARO Westfield (Aug. 8.13-15p2)
- K19J06E 2019 JE6 (arc=93 days, H=22.2 ~123m) from the Zwicky Transient Facility (ZTF) (Aug. 10.35p1)
- K10P09K 2010 PK9 (q=0.221 AU, arc=4 opp, H=21.8 ~148m) from SONEAR (July 29.04-05p3)
- Observations of other objects
- K19P00A 2019 PA (Q=4.749 AU, arc=11 days, H=19.5 ~426m) from ZTF (Aug. 13.21p1 & 13.36-39p3)
- K19O02V 2019 OV2 (arc=70 days, H=20.4 ~282m) from ARO Westfield (Aug. 8.30-32p5)
- K19O01M 2019 OM1 (arc=40 days, H=21.4 ~178m) from program code "-" (22) via Slooh.com Canary Islands Obs. (Aug. 14.15-16p3)
- K19O01J 2019 OJ1 (arc=15 days, H=21.5 ~170m) from ARO Westfield (Aug. 8.19-21p5)
- K19N00V 2019 NV (arc=59 days, H=19.2 ~490m) from ZTF (Aug. 12.44-48p2)
- K19H00C 2019 HC (Q=4.142 AU, arc=115 days, H=17.3 ~1.17 km) from ARO Westfield (Aug. 8.16-19p5)
- K17Y05T 2017 YT5 (i=36.5°, arc=4 opp, H=19.0 ~537m) from Castelmartini Obs. (Aug. 10.83p3)
- K15H10B 2015 HB10 (arc=3 opp, H=18.2 ~776m) from Slooh.com Canary Islands Obs. (Aug. 13.20-23p3)
- K06Q23S 2006 QS23 (arc=5 opp, H=20.0 ~339m) from ZTF (Aug. 10.42-44p4)
- K05Q10S 2005 QS10 (arc=3 opp, H=18.8 ~589m) from NEAT's USAF Haleakala telescope (2005 Aug. 30.53-55p3)
- r2874 532874 2013 YZ13 from ZTF (Aug. 2.27p2)
- q8159 528159 2008 HS3 from ZTF (Aug. 8.32-36p4, 10.20p2 & 10.37-38p6)
- n2143 492143 2013 OE from ZTF (Aug. 10.40p1, 10.44p1 & 13.46-48p2)
- j5432 455432 2003 RP8 from SONEAR (July 13.33-35p3 & 22.99p3) and Landehen Obs. (Aug. 12.89-91p5)
- j0293 450293 2004 LV3 from PS1 (Aug. 13.33-35p3)
- Z5256 355256 2007 KN4 from Castelmartini Obs. (Aug. 10.84-85p3)
- L4088 214088 2004 JN13 from SONEAR (July 1.24p3)
- H3561 173561 2000 YV137 from Castelmartini Obs. (Aug. 10.82-83p3)
- G2273 162273 1999 VL12 from ZTF (Aug. 11.47-49p3 & 13.47-50p2)
- F4229 154229 2002 JN97 from SONEAR (July 20.17-19p3)
- 68950 68950 2002 QF15 from Castelmartini Obs. (Aug. 10.82p3)
- 18172 18172 2000 QL7 from ZTF (Aug. 11.46-50p5, 12.42p1 & 12.47p1)
- 12538 12538 1998 OH from Castelmartini Obs. (Aug. 10.84p3)
- 11500 11500 Tomaiyowit (1989 UR) from G. Gasparovic via Slooh.com Canary Islands Obs. (Aug. 12.95-98p3)
- 01866 1866 Sisyphus (1972 XA) from MASTER OAFA Obs. (Aug. 13.40-41p2)
Observers on 14 August '19
Fourteen observers appear in today's MPECs.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 9 in MPECs 2019-P99, 2019-P100 & 2019-P101 -- 2019 PR2, 2019 PQ2, 2019 OV2, 2019 OT1, 2019 OO1, 2019 OJ1, 2019 OA2, 2019 JX6, 2019 HC|
|160||Castelmartini Obs. in Italy, 5 in MPEC 2019-P99 -- 2017 YT5, 68950, 355256, 173561, 12538|
|Z43||Landehen Obs., 1 in MPEC 2019-P99 -- 455432|
|W92||MASTER OAFA Obs., 1 in MPEC 2019-P99 -- 1866|
|568^||R. Wainscoat on Mauna Kea in Hawaii, 3 in MPECs 2019-P101, 2019-P102 & 2019-P103 -- 2019 PV2, 2019 PS2, 2019 PR2|
|608||NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2019-P99 -- 2005 QS10|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2019-P99, 2019-P100, 2019-P101, 2019-P102 & 2019-P103 -- 2019 PV2, 2019 PS2, 2019 PR2, 2019 PQ2, 450293|
|C95||SATINO-1 in France, 1 in MPEC 2019-P99 -- 2019 OU1|
|G40||Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-P99 -- 2015 HB10|
|G40"||G. Gasparovic in Croatia via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-P99 -- 11500|
|G40-||program code "-" (22) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-P99 -- 2019 OM1|
|Y00||SONEAR in Brazil, 5 in MPEC 2019-P99 -- 2019 NC1, 2010 PK9, 455432, 214088, 154229|
|291||Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2019-P99 -- 2019 PO1|
|T14||UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 2 in MPEC 2019-P99 -- 2019 PO1, 2019 LR4|
|L01||Visnjan Obs., 1 in MPEC 2019-P101 -- 2019 PR2|
|I41||Zwicky Transient Facility (ZTF) in southern California, 9 in MPEC 2019-P99 -- 2019 PA, 2019 NV, 2019 JE6, 2006 QS23, 532874, 528159, 492143, 18172, 162273|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 14 August '19
Notes for Today's Latest Risk Assessments
|2019 PO1||JPL Sentry||1530||2059-2115||37||3.76564781e-05||-6.01||-6.21||0||JPL: Computed at 06:16 today Pacific time based on 17 observations spanning 3.0406 days (2019-Aug-09.53131 to 2019-Aug-12.571914). Diameter approximately 0.009 km. from weighted mean H=27.78.|
|NEODyS||1530||2066-2109||46||2.39e-06||-7.36||-8.18||0||NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2019-08-09.532 to 2019-08-12.573."|
|2019 LR4||JPL Sentry||1530||R E M O V E D||JPL: Risk listing removed at 1302 UTC today|
|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 August '19
Times are UTC for when items were noted or added by The Tracking News.
|2210||Grabbed MPEC 2019-P103 - 2019 PV2 - see above|
|1812||Generated Traffic Report|
|1530||Noted that JPL Sentry has removed 2019 LR4 as an impact risk - see above|
Noted that NEODyS has removed 2019 LR4 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 PO1 risk assessment - see above
Noted that NEODyS has updated its 2019 PO1 risk assessment - see above
Grabbed MPEC 2019-P99 - Daily Orbit Update - see above
Grabbed MPEC 2019-P100 - 2019 PQ2 - see above
Grabbed MPEC 2019-P101 - 2019 PR2 - see above
Grabbed MPEC 2019-P102 - 2019 PS2 - see above