Contents  on 23 August '18

Asteroid/Comet Connection (A/CC) Resources:

The latest A/CC news is available via framed access, RSS news feed RSS news feed, or redirection.

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 23 August '18

Four objects reported inside ten LD

There are four small celestial objects reported to be less than ten lunar distances (LD) from our home world today. Closest is risk-listed NHATS target 2018 QE, which is outbound from 3.99 to 4.76 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  3.99 to 4.76 LD Aug. 10 - 29 NHATS target, risk
6.21 LD Aug. 9 2018 PN22 11 m  9.73 to 10.16 LD July 25 - today NHATS target, exits ten LD
7.80 LD today 2018 PU23 8 m  7.80 LD Aug. 7 - Sept. 13 NHATS target, Earth closest at 2052 UTC, risk
9.36 LD Aug. 27 2018 LQ2 37 m  9.45 from 9.50 LD Aug. 17 - Sept. 6 NHATS target
Approaching Traffic
4.22 LD Aug. 29 1998 SD9 49 m  13.45 from 15.75 LD Aug. 25 - Sept. 2 radar target

This report was generated at 1920 UTC with first follow-up in today's DOU MPEC for departed 2018 QX.


<< Reading:  The SETI Insitute has an article about a large effort to observe 134340 Pluto by stellar occultation, in particular trying to study the atmosphere of that dwarf planet and Kuiper belt member. A new white paper proposes a mission to orbit the Pluto system. Speaking of Kuiper belt objects, a recent science paper (PDF) by David Jewitt endeavors to sort out the zoology of Solar-System small bodies that live out beyond Neptune. And this is probably a good place to note that a science paper back in April reported on "an abundance of contact binaries" in the Plutino population (KBOs with Pluto-like orbits).



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 23 August '18

The MPC's NEO Confirmation Page has 29 listings

When last checked at 2331 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 29 objects listed. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 34 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 23 August '18

Minor Planet Electronic Circulars

As of last check at 2331 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-Q66 - "15:34 UT" - 2018 QF1


<< DOU on 23 Aug. '18 >>  MPEC 2018-Q65 - "12:08 UT" - Daily Orbit Update


MPEC 2018-Q64 - "06:16 UT" - Comet C/2018 N2 (ASASSN)


MPEC 2018-Q63 - "05:53 UT" - Comet P/2018 L5 (Leonard)


MPEC 2018-Q62 - "05:17 UT" - Comet C/2017 S3 (Panstarrs)

Observers  on 23 August '18

A total of 71 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2018-Q62 -- C/2017 S3
K40Altdorf Obs. in Germany, 1 in MPEC 2018-Q62 -- C/2017 S3
H21Astronomical Research Obs. Westfield in Illinois, 6 in MPECs 2018-Q65 & 2018-Q66 -- 2018 QX, 2018 QW, 2018 QT, 2018 QF1, 2018 QA1, 2018 PS24
T05ATLAS Haleakala in Hawaii, 3 in MPECs 2018-Q65 & 2018-Q66 -- 2018 QF1, 16834, 3552
C86Blanes Obs. in Spain, 1 in MPEC 2018-Q62 -- C/2017 S3
Q68Blue Mountains Obs. in New South Wales, 1 in MPEC 2018-Q64 -- C/2018 N2
B96Brixiis Obs. in Belgium, 1 in MPEC 2018-Q62 -- C/2017 S3
215Buchloe Obs. in Germany, 2 in MPECs 2018-Q62 & 2018-Q63 -- P/2018 L5, C/2017 S3
W96Campo Catino Austral Obs. in Chile, 1 in MPEC 2018-Q64 -- C/2018 N2
160Castelmartini Obs. in Italy, 9 in MPEC 2018-Q65 -- 2018 PW7, 2018 PL10, 2018 NB, 2018 MM8, 2016 NF23, 2015 AX16, 1999 VQ11, 162168, 3552
A77Chante-Perdrix Obs. in France, 1 in MPEC 2018-Q62 -- C/2017 S3
970Chelmsford Obs. in England, 1 in MPEC 2018-Q62 -- C/2017 S3
J01Cielo Profundo Obs. in Spain, 1 in MPEC 2018-Q62 -- C/2017 S3
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2018-Q66 -- 2018 QF1
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2018-Q66 -- 2018 QF1
L05Dridri Obs. in Italy, 1 in MPEC 2018-Q62 -- C/2017 S3
K02Eastwood Obs. in England, 1 in MPEC 2018-Q62 -- C/2017 S3
K77EHB01 Obs., 1 in MPEC 2018-Q62 -- C/2017 S3
006Fabra Obs. in Spain, 2 in MPEC 2018-Q65 -- 17274, 1627
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2018-Q66 -- 2018 QF1
K83Forti Obs., 1 in MPEC 2018-Q62 -- C/2017 S3
K97Freconrupt Obs., 1 in MPEC 2018-Q62 -- C/2017 S3
K88GINOP-KHK in Hungary, 1 in MPEC 2018-Q66 -- 2018 QF1
J95Great Shefford Obs. in England, 2 in MPECs 2018-Q62 & 2018-Q66 -- 2018 QF1, C/2017 S3
238Grorudalen Obs. in Norway, 1 in MPEC 2018-Q62 -- C/2017 S3
A17Guidestar Obs. in Germany, 6 in MPECs 2018-Q65 & 2018-Q66 -- 2018 QF1, 2016 NF23, 2013 EP41, 65996, 65706, 350988
C43Hoyerswerda Obs. in Germany, 2 in MPECs 2018-Q62 & 2018-Q66 -- 2018 QF1, C/2017 S3
048Hradec Kralove Obs. in the Czech Republic, 1 in MPEC 2018-Q62 -- C/2017 S3
987Isle of Man Obs. on the Isle of Man, 1 in MPEC 2018-Q62 -- C/2017 S3
U69&program code "&" (15) via iTelescope Obs. Auberry in northern California, 1 in MPEC 2018-Q62 -- C/2017 S3
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-Q62 -- C/2017 S3
H06#M. Suzuki in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-Q62 -- C/2017 S3
I892program code 2 via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2018-Q62 -- C/2017 S3
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-Q64 -- C/2018 N2
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-Q65 -- 2018 QA1
L12Koksijde Obs., 1 in MPEC 2018-Q62 -- C/2017 S3
J87La Canada Obs. in Spain, 1 in MPEC 2018-Q62 -- C/2017 S3
D35Lulin Minor Bodies Tracking in Taiwan, 1 in MPEC 2018-Q62 -- C/2017 S3
C10Maisoncelles Obs. in France, 1 in MPEC 2018-Q62 -- C/2017 S3
L51MARGO in Ukraine, 1 in MPEC 2018-Q62 -- C/2017 S3
C41MASTER-II Kislovodsk in Russia, 2 in MPEC 2018-Q65 -- 503960, 2061
118Modra Obs. in Slovakia, 1 in MPEC 2018-Q66 -- 2018 QF1
213Montcabre Obs. in Spain, 1 in MPEC 2018-Q62 -- C/2017 S3
K74Muensterschwarzach Obs. in Germany, 2 in MPECs 2018-Q65 & 2018-Q66 -- 2018 QF1, 2011 UA
D81Nagano Obs. in Japan, 1 in MPEC 2018-Q62 -- C/2017 S3
C47Nonndorf Obs. in Austria, 2 in MPECs 2018-Q62 & 2018-Q66 -- 2018 QF1, C/2017 S3
Z80Northolt Branch Obs. in England, 3 in MPECs 2018-Q62 & 2018-Q65 -- 2018 KE3, C/2017 S3, 2016 NF23
C23Olmen Obs. in Belgium, 3 in MPECs 2018-Q62 & 2018-Q65 -- 2018 NB, C/2017 S3, 2061
B69Owls & Ravens Obs. in Germany, 1 in MPEC 2018-Q62 -- C/2017 S3
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPECs 2018-Q63 & 2018-Q65 -- P/2018 L5, 2013 EP41, 2011 GA62, 65996, 418929, 11500
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2018-Q63 -- P/2018 L5
323Perth Obs. in Western Australia, 1 in MPEC 2018-Q64 -- C/2018 N2
K80Platanus Obs., 1 in MPEC 2018-Q66 -- 2018 QF1
D29Purple Mtn. Obs. Xuyi Station in China, 14 in MPEC 2018-Q65 -- 2014 PG51, 2013 EP41, 2012 UV27, 2005 RB, 68950, 418929, 418896, 344756, 163818, 141851, 138847, 137427, 13553, 11500
L04ROASTERR-1 in Romania, 1 in MPEC 2018-Q62 -- C/2017 S3
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-Q62 -- C/2017 S3
H36Sandlot Obs. in Kansas, 1 in MPEC 2018-Q66 -- 2018 QF1
C95SATINO-1 in France, 3 in MPECs 2018-Q62, 2018-Q65 & 2018-Q66 -- 2018 QF1, C/2017 S3, 68950
K14Sencelles Obs. in Spain, 1 in MPEC 2018-Q62 -- C/2017 S3
G40'program code "'" (16) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-Q65 -- 2018 QA1
G40(program code "(" (17) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-Q62 -- C/2017 S3
G402program code 2 via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-Q62 -- C/2017 S3
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-Q62 -- C/2017 S3
W883B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 1 in MPEC 2018-Q64 -- C/2018 N2
Y00SONEAR in Brazil, 2 in MPECs 2018-Q64 & 2018-Q65 -- C/2018 N2, 89959
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2018-Q66 -- 2018 QF1
A71Stixendorf Obs. in Austria, 2 in MPECs 2018-Q62 & 2018-Q63 -- P/2018 L5, C/2017 S3
Q38Swan Hill Obs., 1 in MPEC 2018-Q64 -- C/2018 N2
461SZTE Asteroid Program in Hungary, 1 in MPEC 2018-Q63 -- P/2018 L5
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2018-Q62 -- C/2017 S3
A98Taurus-1 Obs. in Belarus, 1 in MPEC 2018-Q62 -- C/2017 S3
B18Terskol Obs. in Russia, 1 in MPEC 2018-Q62 -- C/2017 S3
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-Q65 -- 2005 QQ87
L01Visnjan Obs., 1 in MPEC 2018-Q66 -- 2018 QF1
I15Wishing Star Obs. in Rhode Island, 4 in MPEC 2018-Q65 -- 2001 SC170, 455550, 436771, 17274
367Yatsuka Obs. in Japan, 1 in MPEC 2018-Q62 -- C/2017 S3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 August '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2331 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the NASA/JPL Sentry and NEODyS CLOMON2 risk pages.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2018 QTJPL Sentry15002109-211631.5957e-08-5.91-6.250JPL: Computed at 07:39 today Pacific time based on 25 observations spanning 3.7604 days (2018-Aug-18.5649 to 2018-Aug-22.32534). Diameter approximately 0.262 km. from weighted mean H=20.54.
NEODyS1500210912.99e-10-7.59-7.590NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2018-08-18.566 to 2018-08-22.326."

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale (next 100 years)

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 23 August '18

Times are UTC for when items were noted or added by The Tracking News.

1920Generated Traffic Report
1730Grabbed MPEC 2018-Q66 - 2018 QF1 - see above
1500Noted that JPL Sentry has updated its 2018 QT risk assessment - see above
Noted that NEODyS has updated its 2018 QT risk assessment - see above
Grabbed MPEC 2018-Q62 - Comet C/2017 S3 (Panstarrs) - see above
Grabbed MPEC 2018-Q63 - Comet P/2018 L5 (Leonard) - see above
Grabbed MPEC 2018-Q64 - Comet C/2018 N2 (ASASSN) - see above
Grabbed MPEC 2018-Q65 - Daily Orbit Update - see above