Contents on 1 August '17
- Traffic Report -- two objects
- IAU Minor Planet Center
- Observers -- 31 observers
- Impact Risk Monitoring -- one object
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 789 risk-listed objects, 24 have had news in the last 31 days. Updated at 1530 UTC on 1 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 1 August '17
Two objects reported inside ten LD
Two Solar-System small bodies are reported moving within ten lunar distances (LD) of Earth today. Risk-listed 2017 OE7 is outbound from 7.17 to 8.02 LD and 2017 NB7 is inbound from 9.96 to 9.04 LD.
This report was generated at 1941 UTC with the discovery of already departed 2017 OZ19 (MPEC), which flew past us at 4.18 LD on July 17th, and with first follow-up for departed objects 2017 OP1 and 2017 NC in today's DOU MPEC along with continuing follow-up for risk-listed 2017 OM1 and astrometry from early July for 2017 NB.
Editor's note: We have had difficulty today with transferring files to this Web site, which was also apparently off line earlier.
Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting on transient natural objects that approach the actually significant 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 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 1 August '17
The MPC's NEO Confirmation Page has 80 listings
When last checked at 2355 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 80 objects listed. Of these, 47 were "one nighters." So far The Tracking News has counted a total of 98 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 1 August '17
Minor Planet Electronic Circulars
As of last check at 2355 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2017-P01 time-stamped "12:03 UT" - Daily Orbit Update - see below
- MPEC 2017-P02 time-stamped "13:59 UT" - 2017 OZ19 - see below
- MPEC 2017-P03 time-stamped "14:03 UT" - 2017 OA20 - see below
- MPEC 2017-P04 time-stamped "14:07 UT" - 2017 OB20 - see below
- MPEC 2017-P05 time-stamped "14:10 UT" - 2017 OC20 - see below
- MPEC 2017-P06 time-stamped "14:14 UT" - 2017 OD20 - see below
- MPEC 2017-P07 time-stamped "14:17 UT" - 2017 OE20
MPEC 2017-P07 - "14:17 UT" - 2017 OE20
- K17O20E 2017 OE20 (small asteroid, H=25.4 ~28m) was picked up at 1222 UT on 29 July by Pan-STARRS 1 (PS1), observing it at July 29.52-56p4. This detection was confirmed by Astronomical Research Obs. Westfield (July 30.34-37p3 & 31.30-31p3), Dave Balam via Plaskett 1.8m Telescope (July 31.40p3), and the Spacewatch 1.8m telescope (July 31.41-42p2).
MPEC 2017-P06 - "14:14 UT" - 2017 OD20
- K17O20D 2017 OD20 (small asteroid, H=22.2 ~123m) was picked up at 1058 UT on 27 July by PS1, observing it at July 27.46-49p3. This detection was confirmed by ARO Westfield (July 30.23-24p3), GINOP-KHK (Aug. 1.00-01p2), and Farpoint Obs. (Aug. 1.26-30p3).
MPEC 2017-P05 - "14:10 UT" - 2017 OC20
- K17O20C 2017 OC20 (small asteroid, H=24.0 ~54m) was picked up at 1213 UT on 26 July by PS1, observing it at July 26.51-55p2 and 30.49-53p3. This detection was confirmed by ARO Westfield (July 31.38-40p3).
MPEC 2017-P04 - "14:07 UT" - 2017 OB20
- K17O20B 2017 OB20 (small asteroid, Earth MOID=6.9 LD, H=25.9 ~22m) was picked up at 1335 UT on 25 July by PS1, observing it at July 25.57-60p3. This detection was confirmed by Marco Micheli on Mauna Kea (July 26.51p3) and ARO Westfield (July 31.36-38p3).
MPEC 2017-P03 - "14:03 UT" - 2017 OA20
- K17O20A 2017 OA20 (small asteroid, Q=4.002 AU, Earth MOID=7.2 LD, H=22.1 ~129m) was picked up at 1322 UT on 25 July by PS1, observing it at July 25.56-59p4. This detection was confirmed by LCOGT Cerro Tololo B (July 26.40p2), Micheli/Mauna Kea (July 26.50p3), LCOGT Sutherland A (July 26.98-99p3), and ARO Westfield (July 31.36-39p3).
MPEC 2017-P02 - "13:59 UT" - 2017 OZ19
- K17O19Z 2017 OZ19 (Earth MOID=3.3 LD, H=27.5 ~11m) was picked up at 1219 UT on 25 July by PS1, observing it at July 25.51-54p3. This detection was confirmed by Micheli/Mauna Kea (July 26.48p3) and ARO Westfield (July 31.28-31p3 at V=22.7-23.0).
- Observations of risk-listed objects
- K17O01M 2017 OM1 (small asteroid, arc=3 days, H=23.4 ~71m, close passer) from Schiaparelli Obs. (July 25.00-01p3)
- Observations of close-passing objects
- K17O01P 2017 OP1 (arc=6 days, H=25.9 ~22m) from Sertao de Itaparica Obs. (OASI) (July 30.09p3)
- K17N00C 2017 NC (arc=3 days, H=25.7 ~25m) from Schiaparelli Obs. (July 3.92-94p2)
- K17N00B 2017 NB (arc=3 days, H=24.9 ~35m) from Schiaparelli Obs. (July 3.95p5)
- Observation campaigns (NHATS targets, radar support)
- K05V01L 2005 VL1 (arc=2 opp, H=26.5 ~17m, NHATS) from UH/Tholen NEO Follow-Up 2.24m Telescope (Feb. 1.23p2 & 2.22p3)
- J0166 190166 2005 UP156 (radar) from Northolt Branch Obs. (July 30.94-95p10)
- 68950 68950 2002 QF15 (radar) from East Rome Obs. (July 31.88-89p3)
-- NHATS target table & ephemerides -- Planetary radar schedules: Arecibo & Goldstone
- Observations of small asteroids (H>22.0)
- K17O19R 2017 OR19 (arc=2 days, H=23.7 ~62m) from Squirrel Valley Obs. (July 31.21-23p3)
- K17O07H 2017 OH7 (Q=4.637 AU, arc=7 days, H=22.6 ~102m) from Tony Evans via Slooh.com Canary Islands Obs. (Aug. 1.02-04p3)
- K17O07F 2017 OF7 (arc=6 days, H=23.2 ~78m) from M. Kumrucu-Lohmiller via Slooh.com Canary Islands Obs. (July 31.06-07p3) and GiaGa Obs. (July 31.89p1 & 31.93p1)
- K17O01G 2017 OG1 (arc=9 days, H=23.2 ~78m) from Schiaparelli Obs. (July 24.91-92p3)
- K17M08T 2017 MT8 (arc=20 days, H=23.2 ~78m) from Schiaparelli Obs. (July 4.04-06p3)
- K17B06S 2017 BS6 (arc=183 days, H=23.1 ~81m) from Schiaparelli Obs. (July 27.98-99p2)
- Observations of other objects
- K17O18T 2017 OT18 (arc=4 days, H=19.0 ~537m) from Haute Provence Obs. (July 27.98-01p7)
- K17O01L 2017 OL1 (Q=4.002 AU, arc=11 days, H=21.7 ~155m) from Schiaparelli Obs. (July 24.90p5 & 27.97p5), Forti Obs. (July 28.88p6), Northolt Branch Obs. (July 30.99-01p9), ROASTERR-1 (July 31.86-87p3), Nonndorf Obs. (July 31.89-91p5), and North Obs. (July 31.91-92p3)
- K17O01D 2017 OD1 (arc=8 days, H=20.5 ~269m) from Schiaparelli Obs. (July 25.05-06p2)
- K17N05S 2017 NS5 (i=44.1°, arc=16 days, H=20.8 ~234m) from Schiaparelli Obs. (July 19.01p5)
- K17M07V 2017 MV7 (arc=7 days, H=20.2 ~309m) from Schiaparelli Obs. (July 4.01-02p3)
- K17M05C 2017 MC5 (arc=24 days, H=21.0 ~214m) from Schiaparelli Obs. (July 19.07-09p2)
- K17M03G 2017 MG3 (arc=27 days, H=21.5 ~170m) from Schiaparelli Obs. (July 3.97-99p3)
- K17M02Y 2017 MY2 (arc=35 days, H=21.0 ~214m) from Schiaparelli Obs. (July 19.04-06p3)
- K17G06Q 2017 GQ6 (arc=117 days, H=19.0 ~537m) from Northolt Branch Obs. (July 31.05-06p6)
- K16C32L 2016 CL32 (arc=2 opp, H=19.3 ~467m) from Schiaparelli Obs. (July 19.02-03p2)
- K11N00P 2011 NP (i=39.0°, arc=4 opp, H=20.0 ~339m) from Schiaparelli Obs. (July 18.99-00p3)
- K11C22C 2011 CC22 (arc=2 opp, H=21.0 ~214m) from Schiaparelli Obs. (July 27.92-95p3)
- K09V25Y 2009 VY25 (arc=2 opp, H=19.5 ~426m) from Homburg-Erbach Obs. (2016 Aug. 25.01-04p2)
- K09B00F 2009 BF (i=51.7°, arc=4 opp, H=18.7 ~616m) from Schiaparelli Obs. (July 24.93-94p2 & 27.95-96p3) and Northolt Branch Obs. (July 30.95-97p3)
- n6018 496018 2008 NU from Forti Obs. (July 28.89-90p4), Northolt Branch Obs. (July 31.02-03p9), and Picoto Obs. (July 31.92-98p3)
- n5959 495959 2007 ML6 from Schiaparelli Obs. (July 4.07-08p3)
- n4975 494975 2009 WO106 from Schiaparelli Obs. (July 18.96-97p3)
- l1241 471241 2011 BX18 from Homburg-Erbach Obs. (2016 Aug. 24.96-99p3)
- Y7813 347813 2002 NP1 from Homburg-Erbach Obs. (2016 Aug. 23.91-95p3 & 2016 Aug. 24.92-94p3)
- U4640 304640 2006 WW1 from GiaGa Obs. (July 31.90p1 & 31.95p1)
- E3992 143992 2004 AF from Forti Obs. (July 29.00-01p6)
- E1354 141354 2002 AJ29 from Homburg-Erbach Obs. (2016 May 6.03-04p3)
- D8925 138925 2001 AU43 from Kalamazoo Obs. (July 29.17-19p8), Northolt Branch Obs. (July 30.98p9), Transit Dreams Obs. (July 31.28-31p3), Oberfrauendorf Obs. (July 31.89-90p4), PASTIS Obs. (July 31.91p4), and Spirit Marsh Obs. (Aug. 1.15-16p3 & 1.26p3)
- D6818 136818 Selqet (1997 MW1) from GiaGa Obs. (July 31.92p1 & 31.96p1)
- A6589 106589 2000 WN107 from Squirrel Valley Obs. (July 31.10-13p4)
- 90075 90075 2002 VU94 from Transit Dreams Obs. (July 31.24-26p3) and ATLAS Mauna Loa (July 31.56-59p4)
- 66146 66146 1998 TU3 from Forti Obs. (July 29.08p3)
- 07350 7350 1993 VA from Homburg-Erbach Obs. (2016 May 6.85-88p3)
- 07336 7336 Saunders (1989 RS1) from Squirrel Valley Obs. (Aug. 1.14-17p4)
- 06053 6053 1993 BW3 from Forti Obs. (July 28.93-94p6) and Transit Dreams Obs. (July 31.23-26p3)
- 02329 2329 Orthos (1976 WA) from MASTER IAC Obs. (July 30.87p3)
- 01866 1866 Sisyphus (1972 XA) from Homburg-Erbach Obs. (2016 May 6.93-95p3)
Observers on 1 August '17
A total of 31 observers appear in today's MPECs.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 6 in MPECs 2017-P02, 2017-P03, 2017-P04, 2017-P05, 2017-P06 & 2017-P07 -- 2017 OZ19, 2017 OE20, 2017 OD20, 2017 OC20, 2017 OB20, 2017 OA20|
|T08||ATLAS Mauna Loa in Hawaii, 1 in MPEC 2017-P01 -- 90075|
|L00||East Rome Obs., 1 in MPEC 2017-P01 -- 68950|
|734||Farpoint Obs. in Kansas, 1 in MPEC 2017-P06 -- 2017 OD20|
|K83||Forti Obs., 5 in MPEC 2017-P01 -- 2017 OL1, 66146, 496018, 143992, 6053|
|203||GiaGa Obs. in Italy, 3 in MPEC 2017-P01 -- 2017 OF7, 304640, 136818|
|K88||GINOP-KHK in Hungary, 1 in MPEC 2017-P06 -- 2017 OD20|
|511||Haute Provence Obs. in Germany, 1 in MPEC 2017-P01 -- 2017 OT18|
|196||Homburg-Erbach Obs. in Germany, 6 in MPEC 2017-P01 -- 2009 VY25, 471241, 347813, 141354, 7350, 1866|
|W19||Kalamazoo Obs. in Michigan, 1 in MPEC 2017-P01 -- 138925|
|W86||LCOGT Cerro Tololo B in Chile, 1 in MPEC 2017-P03 -- 2017 OA20|
|K91||LCOGT Sutherland A in South Africa, 1 in MPEC 2017-P03 -- 2017 OA20|
|Z22||MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2017-P01 -- 2329|
|568_||Marco Micheli on Mauna Kea in Hawaii, 3 in MPECs 2017-P02, 2017-P03 & 2017-P04 -- 2017 OZ19, 2017 OB20, 2017 OA20|
|C47||Nonndorf Obs. in Austria, 1 in MPEC 2017-P01 -- 2017 OL1|
|J69||North Obs. in England, 1 in MPEC 2017-P01 -- 2017 OL1|
|Z80||Northolt Branch Obs. in England, 6 in MPEC 2017-P01 -- 2017 OL1, 2017 GQ6, 2009 BF, 496018, 190166, 138925|
|G34||Oberfrauendorf Obs. in Germany, 1 in MPEC 2017-P01 -- 138925|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 6 in MPECs 2017-P02, 2017-P03, 2017-P04, 2017-P05, 2017-P06 & 2017-P07 -- 2017 OZ19, 2017 OE20, 2017 OD20, 2017 OC20, 2017 OB20, 2017 OA20|
|K19||PASTIS Obs. in France, 1 in MPEC 2017-P01 -- 138925|
|Z38||Picoto Obs., 1 in MPEC 2017-P01 -- 496018|
|6581||Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2017-P07 -- 2017 OE20|
|L04||ROASTERR-1 in Romania, 1 in MPEC 2017-P01 -- 2017 OL1|
|204||Schiaparelli Obs. in Italy, 19 in MPEC 2017-P01 -- 2017 OM1, 2017 OL1, 2017 OG1, 2017 OD1, 2017 NS5, 2017 NC, 2017 NB, 2017 MY2, 2017 MV7, 2017 MT8, 2017 MG3, 2017 MC5, 2017 BS6, 2016 CL32, 2011 NP, 2011 CC22, 2009 BF, 495959, 494975|
|Y28||Sertao de Itaparica Obs. in Brazil, 1 in MPEC 2017-P01 -- 2017 OP1|
|G40!||M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-P01 -- 2017 OF7|
|G403||Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-P01 -- 2017 OH7|
|291||Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2017-P07 -- 2017 OE20|
|V78||Spirit Marsh Obs. in Minnesota, 1 in MPEC 2017-P01 -- 138925|
|W34||Squirrel Valley Obs. in North Carolina, 3 in MPEC 2017-P01 -- 2017 OR19, 106589, 7336|
|W33||Transit Dreams Obs., 3 in MPEC 2017-P01 -- 90075, 138925, 6053|
|T12||UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-P01 -- 2005 VL1|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 1 August '17
Notes for Today's Latest Risk Assessments
|2017 OM1||JPL Sentry||1530||2084-2113||5||2.1156158e-06||-4.95||-5.21||0||JPL: Computed at 08:10 today Pacific time based on 135 observations spanning 2.5921 days (2017-Jul-22.50692 to 2017-Jul-25.098999). Diameter approximately 0.073 km. from weighted mean H=23.33.|
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 1 August '17
Times are UTC for when items were noted or added by The Tracking News.
|1941||Generated Traffic Report|
|1530||Noted that JPL Sentry has updated its 2017 OM1 risk assessment - see above|
|1500||Grabbed MPEC 2017-P01 - Daily Orbit Update - see above|
Grabbed MPEC 2017-P02 - 2017 OZ19 - see above
Grabbed MPEC 2017-P03 - 2017 OA20 - see above
Grabbed MPEC 2017-P04 - 2017 OB20 - see above
Grabbed MPEC 2017-P05 - 2017 OC20 - see above
Grabbed MPEC 2017-P06 - 2017 OD20 - see above
Grabbed MPEC 2017-P07 - 2017 OE20 - see above