Contents on 10 August '19
- Traffic Report -- two objects
- IAU Minor Planet Center
- Observers -- nineteen observers
- Impact Risk Monitoring -- two objects
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 1063 risk-listed objects, 87 have had news in the last 31 days. Updated at 2110 UTC on 10 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 10 August '19
Two objects reported inside ten LD
Two asteroids are reported to be less than ten lunar distances (LD) from Earth today, with the closest, 2019 PT, headed out from 7.89 to 9.07 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|
|4.49 LD Aug. 5||2019 PT||22 m||7.89 to 9.07 LD||July 29 - tomorrow|
|8.31 LD Aug. 7||2019 PU||23 m||9.18 to 9.84 LD||Aug. 3 - 11|
|Approaching Traffic - sorted by 10-LD bubble entry date|
|8.7 LD Aug. 16*||2019 PJ||56 m||18.2 from 21.1 LD||Aug. 14 - 17||EPU +/- 30 mins.*|
|2.7 LD Aug. 28*||2019 OU1||89 m||52.5 from 55.6 LD||Aug. 25 - 31||EPU +/- 1.60 hours*|
|*EPU = Earth passage uncertainty|
This report was updated at 2135 UTC with the discovery of departed risk-listed 2019 PO1 (MPEC), which apparently was inside ten LD for all of July, passing our planet at about 7.3 LD around July 14th (+/-1.428 days uncertainty). Your first neighborhood flying rocks traffic report was generated at 1712 UTC with the discovery announced late yesterday of just departed 2019 PH1 (MPEC), which flew by us at 2.06 LD on August 7th.
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 10 August '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, 23 were "one nighters." So far The Tracking News has counted a total of 58 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 10 August '19
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there have been four MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2019-P74 time-stamped "03:00 UT" - 2019 PJ1 - see below
- MPEC 2019-P75 time-stamped "13:34 UT" - Daily Orbit Update - see below
- MPEC 2019-P76 time-stamped "19:19 UT" - 2019 PO1 - see below
- MPEC 2019-P77 time-stamped "19:35 UT" - 2019 PP1
MPEC 2019-P77 - "19:35 UT" - 2019 PP1
- K19P01P 2019 PP1 (small asteroid, H=22.2 ~123m) was picked up at 1127 UT on 8 Aug. by ATLAS Mauna Loa, observing it at Aug. 8.48-50p4 and 9.50-51p5. This detection was confirmed by El Gato Gris Obs. (Aug. 9.99-01p3), W.F. Cashwell via Slooh.com Chile Obs. (Aug. 10.14-17p2), and Auger Obs. (Aug. 10.36-38p6).
MPEC 2019-P76 - "19:19 UT" - 2019 PO1
- K19P01O 2019 PO1 (risk listed, Earth MOID=2.6 LD, H=27.6 ~10m, close passer) was picked up at 1245 UT on 9 Aug. by Pan-STARRS 1 (PS1), observing it at Aug. 9.53-56p4. This detection was confirmed by Visnjan Obs. (Aug. 9.95-97p4) and Astronomical Research Obs. Westfield (Aug. 10.24-25p3).
- Observations of risk-listed objects
- K19N07D 2019 ND7 (arc=13 days, H=21.4 ~178m) from ATLAS Haleakala (July 7.59-60p2)
- Observation campaigns (NHATS targets, radar support)
- K18R07Y 2018 RY7 (arc=2 opp, H=24.4 ~45m, NHATS) from SOAR (Aug. 9.43p5 at r=22.7-23.3)
- K15R02H 2015 RH2 (arc=3 opp, H=21.9 ~141m, NHATS) from Pan-STARRS 2 (PS2) (Aug. 8.48-52p4)
- 03200 3200 Phaethon (1983 TB) (radar) from Grorudalen Obs. (Aug. 9.00-03p3)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
- Observations of small asteroids (H>22.0)
- K19O03W 2019 OW3 (arc=11 days, H=22.1 ~129m) from San Marcello Pistoiese Obs. (Aug. 10.02-03p3)
- K19O00M 2019 OM (arc=69 days, H=22.6 ~102m) from San Marcello Pistoiese Obs. (Aug. 9.99-02p3)
- Observations of other objects
- K19O01J 2019 OJ1 (arc=15 days, H=21.5 ~170m) from SATINO-1 (Aug. 4.90-91p3) and Castelmartini Obs. (Aug. 9.94p3)
- K19G03D 2019 GD3 (arc=129 days, H=20.7 ~245m) from San Marcello Pistoiese Obs. (Aug. 10.04p3)
- K17Y05T 2017 YT5 (i=36.5°, arc=4 opp, H=19.0 ~537m) from Tentlingen Obs. (Aug. 8.89-91p3) and Castelmartini Obs. (Aug. 9.88p3)
- K07E00F 2007 EF (arc=4 opp, H=21.4 ~178m) from UH/Tholen NEO Follow-Up 2.24m Telescope (May 30.41-44p4)
- j5432 455432 2003 RP8 from Castelmartini Obs. (Aug. 9.93p3)
- Z5256 355256 2007 KN4 from Castelmartini Obs. (Aug. 9.91-92p3) and Squirrel Valley Obs. (Aug. 10.06-08p3)
- H3561 173561 2000 YV137 from Tentlingen Obs. (Aug. 8.84p1) and Castelmartini Obs. (Aug. 9.87p3)
- F3842 153842 2001 XT30 from Tentlingen Obs. (Aug. 9.05-08p5) and Cancelada Obs. (Aug. 9.88-90p3)
- D7170 137170 1999 HF1 from MASTER OAFA Obs. (Aug. 8.98-99p2)
- 90403 90403 2003 YE45 from Squirrel Valley Obs. (Aug. 10.10-13p3)
- 68950 68950 2002 QF15 from Castelmartini Obs. (Aug. 9.86-87p3)
- 27346 27346 2000 DN8 from Castelmartini Obs. (Aug. 9.92-93p3)
- 12538 12538 1998 OH from Castelmartini Obs. (Aug. 9.90-91p3)
MPEC 2019-P74 - "03:00 UT" - 2019 PJ1
- K19P01J 2019 PJ1 (H=20.0 ~339m) was picked up at 1138 UT on 8 Aug. by PS1, observing it at 2017 June 21.55-56p2 at G=22.8-23.8, 2017 July 26.41-45p4 at G=21.8-22.3, July 3.56-58p3 at G=21.9-22.6, 7.56-60p4 at G=22.0-22.5, and Aug. 8.49-53p4 at w=21.1-3. This detection was confirmed by Visnjan Obs. (Aug. 8.99-00p3 & 9.93-94p3) and PS2 (Aug. 9.43-47p4).
Observers on 10 August '19
Nineteen observers appear in today's MPECs.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2019-P76 -- 2019 PO1|
|T05||ATLAS Haleakala in Hawaii, 1 in MPEC 2019-P75 -- 2019 ND7|
|T08||ATLAS Mauna Loa in Hawaii, 1 in MPEC 2019-P77 -- 2019 PP1|
|I47||Auger Obs. in Argentina, 1 in MPEC 2019-P77 -- 2019 PP1|
|Z36||Cancelada Obs., 1 in MPEC 2019-P75 -- 153842|
|160||Castelmartini Obs. in Italy, 8 in MPEC 2019-P75 -- 2019 OJ1, 2017 YT5, 68950, 455432, 355256, 27346, 173561, 12538|
|I19||El Gato Gris Obs. in Argentina, 1 in MPEC 2019-P77 -- 2019 PP1|
|238||Grorudalen Obs. in Norway, 1 in MPEC 2019-P75 -- 3200|
|W92||MASTER OAFA Obs., 1 in MPEC 2019-P75 -- 137170|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2019-P74 & 2019-P76 -- 2019 PO1, 2019 PJ1|
|F52||Pan-STARRS 2 (PS2) in Hawaii, 2 in MPECs 2019-P74 & 2019-P75 -- 2019 PJ1, 2015 RH2|
|104||San Marcello Pistoiese Obs. in Italy, 3 in MPEC 2019-P75 -- 2019 OW3, 2019 OM, 2019 GD3|
|C95||SATINO-1 in France, 1 in MPEC 2019-P75 -- 2019 OJ1|
|W88!||W.F. Cashwell in Nevada via Slooh.com Chile Obs. in Chile, 1 in MPEC 2019-P77 -- 2019 PP1|
|I33||SOAR in Chile, 1 in MPEC 2019-P75 -- 2018 RY7|
|W34||Squirrel Valley Obs. in North Carolina, 2 in MPEC 2019-P75 -- 90403, 355256|
|A16||Tentlingen Obs. in Switzerland, 3 in MPEC 2019-P75 -- 2017 YT5, 173561, 153842|
|T12||UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2019-P75 -- 2007 EF|
|L01||Visnjan Obs., 2 in MPECs 2019-P74 & 2019-P76 -- 2019 PO1, 2019 PJ1|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 10 August '19
Notes for Today's Latest Risk Assessments
|2019 PO1||JPL Sentry||2108||2054-2104||11||5.729884e-07||-7.96||-8.25||0||JPL: Computed at 13:39 today Pacific time based on 11 observations spanning .72078 days (2019-Aug-09.53131 to 2019-Aug-10.252086). Diameter approximately 0.009 km. from weighted mean H=27.77.|
|2019 ND7||JPL Sentry||1700||2097-2117||20||3.176057e-06||-3.67||-4.38||0||JPL: Computed at 08:11 today Pacific time based on 34 observations spanning 12.871 days (2019-Jul-07.587668 to 2019-Jul-20.458285). Diameter approximately 0.180 km. from weighted mean H=21.42.|
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 10 August '19
Times are UTC for when items were noted or added by The Tracking News.
|2135||Updated Traffic Report|
|2108||Noted that JPL Sentry has posted 2019 PO1 as an impact risk - see above|
|2001||Grabbed MPEC 2019-P77 - 2019 PP1 - see above|
|1934||Grabbed MPEC 2019-P76 - 2019 PO1 - see above|
|1700||Noted that JPL Sentry has updated its 2019 ND7 risk assessment - see above|
|1500||Grabbed MPEC 2019-P75 - Daily Orbit Update - see above|
|0320||Grabbed MPEC 2019-P74 - 2019 PJ1 - see above|