Contents on 25 August '18
- Traffic Report -- four objects
- IAU Minor Planet Center
- Observers -- thirteen observers
- Impact Risk Monitoring -- three objects
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 954 risk-listed objects, 24 have had news in the last 31 days. Updated at 2027 UTC on 25 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 25 August '18
Four objects reported inside ten LD
There are four Solar-System small bodies reported inside ten lunar distances (LD) of Earth today. Nearest is risk-listed 2018 QE, which is outbound from 5.59 to 6.46 LD.
|Neighborhood Traffic - sorted by Earth passage distance, grouped by 5.0 & 10.0 LD boundaries|
|Earth passage||I D||~Size||Distance today||Inside ten LD||Notes|
|2.80 LD Aug. 20||2018 QE||9 m||5.59 to 6.46 LD||Aug. 10 - 29||NHATS target, risk|
|4.22 LD Aug. 29||1998 SD9||49 m||9.00 from 11.18 LD||today - Sept. 2||enters ten LD, radar target|
|7.80 LD Aug. 23||2018 PU23||8 m||7.81 to 7.83 LD||Aug. 7 - Sept. 13||NHATS target, risk|
|9.36 LD Aug. 27||2018 LQ2||37 m||9.38 from 9.41 LD||Aug. 17 - Sept. 6||NHATS target|
This report was generated at 2010 UTC with the discovery of departed risk-listed 2018 QJ1 (MPEC), which flew past us at roughly 8.2 LD on August 5th, and with follow-up in today's DOU MPEC for departed 2018 QZ plus photometry from early July for risk-listed 2018 NJ.
<< Reading: It has been announced that NASA's OSIRIS-REx spacecraft has photographed its destination, risk-listed 101955 Bennu (1999 RQ36).
Waseda University has a news item about finding silica mineral quartz in an Antarctic meteorite, for the first time providing "direct evidence of silica condensation within the solar protoplanetary disk and coming a step closer to understanding solar formation and evolution."
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 25 August '18
The MPC's NEO Confirmation Page has 23 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 23 objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of 31 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 25 August '18
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 2018-Q68 time-stamped "12:04 UT" - Daily Orbit Update - see below
- MPEC 2018-Q69 time-stamped "13:52 UT" - 2001 PU9 - see below
- MPEC 2018-Q70 time-stamped "17:57 UT" - 2018 QH1 - see below
- MPEC 2018-Q71 time-stamped "18:01 UT" - 2018 QJ1
MPEC 2018-Q71 - "18:01 UT" - 2018 QJ1
- K18Q01J 2018 QJ1 (risk listed, Earth MOID=6.0 LD, H=25.0 ~34m, close passer) was picked up at 1239 UT on 21 Aug. by Pan-STARRS 1 (PS1), observing it at Aug. 21.53-56p4. This detection was confirmed by Visnjan Obs. (Aug. 22.03-04p3) and Astronomical Research Obs. Westfield (Aug. 23.32-34p3 at V=22.0-22.2).
MPEC 2018-Q70 - "17:57 UT" - 2018 QH1
- K18Q01H 2018 QH1 (small asteroid, H=25.4 ~28m) was picked up at 1228 UT on 21 Aug. by PS1, observing it at Aug. 21.52-55p3. This detection was confirmed by Visnjan Obs. (Aug. 22.02p3 & 24.07p2), San Marcello Pistoiese Obs. (Aug. 23.96-98p3), and Great Shefford Obs. (Aug. 24.11-12p3 & 24.99-02p3).
MPEC 2018-Q69 - "13:52 UT" - 2001 PU9
- K01P09U 2001 PU9 (H=19.3 ~467m) from WISE (Aug. 22.15p1, 22.28p1, 22.35p1, 22.48p1, 22.54p1, 22.94p1, 23.00p2, 23.13p1, 23.26p1, 23.53p1 & 23.66p1)
- Observations of risk-listed objects
- K18Q00T 2018 QT (arc=6 days, H=20.6 ~257m) from Great Shefford Obs. (Aug. 25.05p2)
- K18N00J 2018 NJ (small asteroid, arc=36 days, H=27.9 ~9m, close passer, NHATS target) from Schiaparelli Obs. (July 6.91-95p3)
- Observations of close-passing objects
- K18Q00Z 2018 QZ (arc=5 days, H=24.1 ~51m) from Great Shefford Obs. (Aug. 24.93-97p3)
- Observation campaigns (NHATS targets, radar support)
- K04R10X 2004 RX10 (arc=4 opp, H=21.3 ~186m, NHATS) from Schiaparelli Obs. (July 7.95-97p2)
-- NHATS target table
- Observations of small asteroids (H>22.0)
- K18Q01F 2018 QF1 (arc=3 days, H=23.4 ~71m) from Great Shefford Obs. (Aug. 25.03-04p4)
- K18Q00W 2018 QW (arc=6 days, H=23.1 ~81m) from Great Shefford Obs. (Aug. 25.07-08p2)
- K18N00A 2018 NA (arc=36 days, H=23.1 ~81m) from Schiaparelli Obs. (July 6.96-98p3)
- K16N23F 2016 NF23 (arc=2 opp, H=22.9 ~89m) from Northolt Branch Obs. (Aug. 24.05-06p5)
- Observations of other objects
- K18Q01E 2018 QE1 (arc=4 days, H=18.4 ~708m) from WISE (Aug. 20.58p2, 20.64p1, 20.71p1, 20.77p1, 20.84p1, 20.90p1, 20.97p1, 21.03p1, 21.16p1, 21.30p1, 21.36p1, 21.43p1, 21.82p1, 21.95p1, 22.08p1, 22.21p1 & 22.34p1)
- K18N04N 2018 NN4 (Q=4.220 AU, arc=38 days, H=18.3 ~741m) from Castelmartini Obs. (Aug. 17.87p3)
- K18N00B 2018 NB (arc=2 opp, H=19.3 ~467m) from Schiaparelli Obs. (July 7.02p5)
- K18L05P 2018 LP5 (arc=55 days, H=20.8 ~234m) from Schiaparelli Obs. (July 8.02-04p2)
- K15R82B 2015 RB82 (arc=2 opp, H=20.1 ~323m) from Schiaparelli Obs. (July 7.01p2)
- K15O00H 2015 OH (arc=2 opp, H=19.9 ~355m) from Castelmartini Obs. (Aug. 17.89-90p3)
- K15MA1Q 2015 MQ101 (arc=2 opp, H=19.8 ~371m) from Schiaparelli Obs. (July 7.92-94p3)
- K15A16X 2015 AX16 (arc=4 opp, H=18.0 ~851m) from the Palomar Transient Factory (PTF) (Aug. 24.46-49p4)
- K14N03E 2014 NE3 (arc=2 opp, H=20.1 ~323m) from Schiaparelli Obs. (July 7.06p2)
- K11G62A 2011 GA62 (arc=4 opp, H=18.9 ~562m) from Schiaparelli Obs. (July 7.03p3)
- K07N01L 2007 NL1 (arc=2 opp, H=21.4 ~178m) from Schiaparelli Obs. (July 7.99p2)
- K05R00B 2005 RB (arc=3 opp, H=20.2 ~309m) from SATINO-1 (Aug. 22.96p3)
- K02O04S 2002 OS4 (arc=5 opp, H=18.3 ~741m) from Castelmartini Obs. (Aug. 17.91-92p3)
- h8429 438429 2006 WN1 from Castelmartini Obs. (Aug. 17.92-93p3)
- S3729 283729 2002 UX from Castelmartini Obs. (Aug. 17.87-88p3)
- P0162 250162 2002 TY57 from PTF (Aug. 24.46-50p4)
- 88263 88263 2001 KQ1 from WISE (Aug. 20.51p1, 20.77p1, 21.03p2 & 21.16p1)
- 86324 86324 1999 WA2 from Castelmartini Obs. (Aug. 17.88-89p3)
- 18882 18882 1999 YN4 from Castelmartini Obs. (Aug. 17.91p3)
- 17274 17274 2000 LC16 from Northolt Branch Obs. (Aug. 24.03-04p7)
- 16960 16960 1998 QS52 from MASTER-II Kislovodsk (Aug. 25.01-02p3)
- 13553 13553 Masaakikoyama (1992 JE) from Kalamazoo Obs. (Aug. 23.15-16p6)
- 09856 9856 1991 EE from WISE (Aug. 21.10p1, 21.23p1, 21.36p1, 21.49p1, 21.56p1, 21.82p1, 21.95p1 & 22.08p1)
- 00719 719 Albert (1911 MT) from Castelmartini Obs. (Aug. 17.86p3)
Observers on 25 August '18
Thirteen observers appear in today's MPECs.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2018-Q71 -- 2018 QJ1|
|160||Castelmartini Obs. in Italy, 8 in MPEC 2018-Q68 -- 2018 NN4, 2015 OH, 2002 OS4, 86324, 438429, 283729, 18882, 719|
|J95||Great Shefford Obs. in England, 5 in MPECs 2018-Q68 & 2018-Q70 -- 2018 QZ, 2018 QW, 2018 QT, 2018 QH1, 2018 QF1|
|W19||Kalamazoo Obs. in Michigan, 1 in MPEC 2018-Q68 -- 13553|
|C41||MASTER-II Kislovodsk in Russia, 1 in MPEC 2018-Q68 -- 16960|
|Z80||Northolt Branch Obs. in England, 2 in MPEC 2018-Q68 -- 2016 NF23, 17274|
|I41||Palomar Transient Factory (PTF) in southern California, 2 in MPEC 2018-Q68 -- 2015 AX16, 250162|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2018-Q70 & 2018-Q71 -- 2018 QJ1, 2018 QH1|
|104||San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-Q70 -- 2018 QH1|
|C95||SATINO-1 in France, 1 in MPEC 2018-Q68 -- 2005 RB|
|204||Schiaparelli Obs. in Italy, 10 in MPEC 2018-Q68 -- 2018 NJ, 2018 NB, 2018 NA, 2018 LP5, 2015 RB82, 2015 MQ101, 2014 NE3, 2011 GA62, 2007 NL1, 2004 RX10|
|L01||Visnjan Obs., 2 in MPECs 2018-Q70 & 2018-Q71 -- 2018 QJ1, 2018 QH1|
|C51||WISE in Earth polar orbit, 4 in MPECs 2018-Q68 & 2018-Q69 -- 2018 QE1, 2001 PU9, 88263, 9856|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 25 August '18
Notes for Today's Latest Risk Assessments
|2018 QJ1||JPL Sentry||1944||2100-2100||1||2.255e-09||-9.08||-9.08||0||JPL: Computed at 11:57 today Pacific time based on 10 observations spanning 1.8112 days (2018-Aug-21.52737 to 2018-Aug-23.338565). Diameter approximately 0.029 km. from weighted mean H=25.33.|
|2018 QT||JPL Sentry||1530||R E M O V E D||JPL: Risk listing removed at 1435 UTC today|
|NEODyS||1530||R E M O V E D||-|
|2018 NJ||JPL Sentry||1530||2083-2116||17||0.00158414857||-4.45||-4.45||0||JPL: Computed at 07:36 today Pacific time based on 38 observations spanning 36.078 days (2018-Jul-05.27485 to 2018-Aug-10.352776). Diameter approximately 0.009 km. from weighted mean H=27.82.|
|NEODyS||1530||2083-2118||43||2.5e-03||-4.27||-4.87||-||NEODyS: "Based on 38 optical observations (of which 1 are rejected as outliers) from 2018-07-05.276 to 2018-08-10.354."|
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 25 August '18
Times are UTC for when items were noted or added by The Tracking News.
|2010||Generated Traffic Report|
|1944||Noted that JPL Sentry has posted 2018 QJ1 as an impact risk - see above|
|1824||Grabbed MPEC 2018-Q71 - 2018 QJ1 - see above|
|1801||Grabbed MPEC 2018-Q70 - 2018 QH1 - see above|
|1530||Noted that JPL Sentry has updated its 2018 NJ risk assessment - see above|
Noted that NEODyS has updated its 2018 NJ risk assessment - see above
Noted that JPL Sentry has removed 2018 QT as an impact risk - see above
Noted that NEODyS has removed 2018 QT as an impact risk - see above
Grabbed MPEC 2018-Q68 - Daily Orbit Update - see above
Grabbed MPEC 2018-Q69 - 2001 PU9 - see above