Contents  on 4 September '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 4 September '18

Three objects reported inside ten LD

Three transient natural objects are reported within ten lunar distances (LD) of Earth today. Closest is outbound 2018 RA, which moves away from 5.06 to 6.36 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
3.03 LD Sept. 1 2018 RA 15 m  5.06 to 6.36 LD Aug. 26 - Sept. 7 DOU
7.80 LD Aug. 23 2018 PU23 8 m  8.58 to 8.71 LD Aug. 7 - Sept. 13 NHATS target, risk
9.36 LD Aug. 27 2018 LQ2 37 m  9.71 to 9.82 LD Aug. 17 - Sept. 6 NHATS target - DOU
Approaching Traffic
8.50 LD Sept. 20 2017 SL16 23 m  24.08 from 25.40 LD Sept. 17 - 24 NHATS target

This report was generated at 1823 UTC with the discovery of already departed 2018 QW1 (MPEC), which passed us at 9.09 LD on August 30th, and with follow-up in today's DOU MPEC for outbound objects 2018 RA and 2018 LQ2, and for departed objects 2018 QZ, 2018 QS, 2018 PP9, and 1998 SD9.



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 4 September '18

The MPC's NEO Confirmation Page has 19 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had nineteen objects listed. Of these, thirteen were "one nighters." The Tracking News counted a total of 22 listings on the NEOCP on this day.

New MPECs  on 4 September '18

Minor Planet Electronic Circulars

There were five MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-R15 - "23:58 UT" - 2018 RC


MPEC 2018-R14 - "17:04 UT" - Comet 46P/Wirtanen


<< DOU on 4 Sept. '18 >>  MPEC 2018-R13 - "12:05 UT" - Daily Orbit Update


MPEC 2018-R12 - "10:20 UT" - 2018 RB


MPEC 2018-R11 - "10:16 UT" - 2018 QW1

Observers  on 4 September '18

A total of 70 observers appeared in this day's MPECs.

CodeObserver / observatory
L2729PREMOTE Obs., 1 in MPEC 2018-R14 -- 46P
349Ageo Obs. in Japan, 1 in MPEC 2018-R14 -- 46P
C97Al-Fulaij Obs., 4 in MPEC 2018-R13 -- 2015 FP118, 144332, 1627, 719
H21Astronomical Research Obs. Westfield in Illinois, 25 in MPECs 2018-R12, 2018-R13 & 2018-R15 -- 2018 RC, 2018 RB, 2018 RA, 2018 QZ, 2018 QV1, 2018 QU1, 2018 QS, 2018 PP9, 2018 PL9, 2018 PK24, 2018 PK10, 2018 PJ9, 2018 PJ22, 2018 PH9, 2018 NR, 2018 NO4, 2018 NN, 2018 NB, 2018 ME7, 2018 LQ2, 2014 SD324, 2013 YB38, 97725, 495102, 277958
T05ATLAS Haleakala in Hawaii, 5 in MPECs 2018-R11, 2018-R12, 2018-R13 & 2018-R14 -- 2018 RB, 2018 QW1, 455550, 144332, 46P
T08ATLAS Mauna Loa in Hawaii, 28 in MPECs 2018-R11, 2018-R13, 2018-R14 & 2018-R15 -- 2018 RC, 2018 QW1, 2018 QU1, 2018 MM8, 2018 LZ5, 2015 RJ83, 2013 EP41, 2011 UA, 2008 RT26, 2007 RX19, 86324, 438429, 31345, 267729, 253062, 250697, 21277, 18109, 17511, 17274, 17182, 162168, 140039, 13553, 6456, 5786, 719, 46P
C77Bernezzo Obs. in Italy, 1 in MPEC 2018-R15 -- 2018 RC
V03Big Water Obs. in Utah, 1 in MPEC 2018-R12 -- 2018 RB
Q68Blue Mountains Obs. in New South Wales, 1 in MPEC 2018-R14 -- 46P
B96Brixiis Obs. in Belgium, 1 in MPEC 2018-R14 -- 46P
215Buchloe Obs. in Germany, 1 in MPEC 2018-R14 -- 46P
W96Campo Catino Austral Obs. in Chile, 1 in MPEC 2018-R14 -- 46P
160Castelmartini Obs. in Italy, 11 in MPEC 2018-R13 -- 2018 NB, 2018 MM8, 2018 GA5, 2012 UV27, 1999 VQ11, 65996, 65706, 141527, 9856, 6456, 3552
703Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2018-R12, 2018-R13 & 2018-R15 -- 2018 RC, 2018 RB, 136849
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 12 in MPEC 2018-R13 -- 2018 PU10, 2018 PT7, 2018 PP23, 2018 PM9, 2018 PM23, 2018 PL20, 2018 PJ21, 2018 NT1, 2018 LM5, 2018 LG5, 2018 LB1, 2018 ED4
A77Chante-Perdrix Obs. in France, 1 in MPEC 2018-R14 -- 46P
970Chelmsford Obs. in England, 1 in MPEC 2018-R13 -- 2015 FP118
J01Cielo Profundo Obs. in Spain, 1 in MPEC 2018-R14 -- 46P
850Cordell-Lorenz Obs. in Tennessee, 2 in MPECs 2018-R11 & 2018-R12 -- 2018 RB, 2018 QW1
113Drebach Obs. in Germany, 1 in MPEC 2018-R15 -- 2018 RC
K02Eastwood Obs. in England, 1 in MPEC 2018-R14 -- 46P
K77EHB01 Obs., 1 in MPEC 2018-R14 -- 46P
J27El Guijo Obs. in Spain, 3 in MPECs 2018-R12 & 2018-R13 -- 2018 RB, 2013 EP41, 115052
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2018-R12 -- 2018 RB
F652Lothar Kurtze in Germany via Faulkes Telescope North in Hawaii, 1 in MPEC 2018-R14 -- 46P
E10*program code "*" (19) via Faulkes Telescope South in New South Wales, 1 in MPEC 2018-R14 -- 46P
E94Gisborne Obs. in New Zealand, 1 in MPEC 2018-R14 -- 46P
J95Great Shefford Obs. in England, 2 in MPECs 2018-R12 & 2018-R13 -- 2018 RB, 2018 RA
A17Guidestar Obs. in Germany, 1 in MPEC 2018-R12 -- 2018 RB
B15Inastars Obs. in Germany, 1 in MPEC 2018-R12 -- 2018 RB
U69"M. Suzuki in Japan via iTelescope Obs. Auberry in northern California, 1 in MPEC 2018-R15 -- 2018 RC
H06#M. Suzuki in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-R11 -- 2018 QW1
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-R12 -- 2018 RB
P93JAXA Space Tracking & Communications Center (JAXA STCC) in Japan, 2 in MPECs 2018-R12 & 2018-R15 -- 2018 RC, 2018 RB
585Kiev Comet Station in Ukraine, 2 in MPECs 2018-R12 & 2018-R14 -- 2018 RB, 46P
168Kourovskaya Obs. in Russia, 8 in MPEC 2018-R13 -- 2018 PL10, 2018 NB, 2015 QM3, 86878, 438429, 162168, 13553, 2061
809La Silla in Chile, 1 in MPEC 2018-R14 -- 46P
Z43Landehen Obs., 1 in MPEC 2018-R13 -- 1998 SD9
D35Lulin Minor Bodies Tracking in Taiwan, 1 in MPEC 2018-R14 -- 46P
C10Maisoncelles Obs. in France, 1 in MPEC 2018-R14 -- 46P
474Mt. John Obs. in New Zealand, 1 in MPEC 2018-R15 -- 2018 RC
K74Muensterschwarzach Obs. in Germany, 1 in MPEC 2018-R14 -- 46P
J69North Obs. in England, 1 in MPEC 2018-R15 -- 2018 RC
Z80Northolt Branch Obs. in England, 2 in MPEC 2018-R13 -- 2018 LQ2, 2015 FP118
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2018-R15 -- 2018 RC
I41Palomar Transient Factory (PTF) in southern California, 2 in MPEC 2018-R13 -- 283729, 20790
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2018-R14 -- 46P
K63Pascoli Obs. in Italy, 1 in MPEC 2018-R12 -- 2018 RB
323Perth Obs. in Western Australia, 1 in MPEC 2018-R14 -- 46P
A48Povegliano Veronese Obs. in Italy, 1 in MPEC 2018-R13 -- 2011 GA62
L04ROASTERR-1 in Romania, 4 in MPEC 2018-R13 -- 2018 QU1, 2018 LQ2, 2015 FP118, 115052
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2018-R12, 2018-R13 & 2018-R14 -- 2018 RB, 2018 QU1, 2005 RB, 46P
H36Sandlot Obs. in Kansas, 2 in MPECs 2018-R12 & 2018-R13 -- 2018 RB, 2018 PK24
C95SATINO-1 in France, 2 in MPECs 2018-R12 & 2018-R13 -- 2018 RB, 2001 SK276
204Schiaparelli Obs. in Italy, 1 in MPEC 2018-R12 -- 2018 RB
Q11Shinshiro Obs., 1 in MPEC 2018-R14 -- 46P
G40'program code "'" (16) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-R14 -- 46P
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPECs 2018-R12 & 2018-R14 -- 2018 RB, 46P
W88!program code "!" (10) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2018-R14 -- 46P
W88%program code "%" (14) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2018-R14 -- 46P
W883B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 1 in MPEC 2018-R14 -- 46P
587Sormano Obs. in Italy, 1 in MPEC 2018-R15 -- 2018 RC
L06Sormano2 Obs. in Italy, 1 in MPEC 2018-R14 -- 46P
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2018-R13 -- 2018 QT
291Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2018-R13 -- 2018 QQ, 2018 PZ23, 2018 PR23, 2018 FS3, 2013 PA7, 1999 FP19
W34Squirrel Valley Obs. in North Carolina, 3 in MPECs 2018-R11, 2018-R12 & 2018-R13 -- 2018 RB, 2018 QW1, 414960
I52Steward Obs. Mt. Lemmon Station in Arizona, 34 in MPECs 2018-R11, 2018-R12 & 2018-R13 -- 2018 RB, 2018 QY, 2018 QW1, 2018 QV1, 2018 QU1, 2018 QT1, 2018 QT, 2018 QP1, 2018 QO1, 2018 QE1, 2018 PX7, 2018 PS7, 2018 PS23, 2018 PM23, 2018 PK24, 2018 PK22, 2018 PK21, 2018 PJ9, 2018 PJ22, 2018 PH9, 2018 PE22, 2018 PA20, 2018 OB1, 2018 NN, 2018 MS6, 2018 MR8, 2018 LZ5, 2018 KV, 2018 KR2, 2018 FN4, 2017 WC29, 2014 GF50, 2013 PA7, 2007 VM243
A71Stixendorf Obs. in Austria, 1 in MPEC 2018-R14 -- 46P
Q38Swan Hill Obs., 1 in MPEC 2018-R14 -- 46P
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2018-R14 -- 46P
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2018-R14 -- 46P
L01Visnjan Obs., 3 in MPECs 2018-R12, 2018-R14 & 2018-R15 -- 2018 RC, 2018 RB, 46P
718Wiggins Obs. in Utah, 3 in MPECs 2018-R11, 2018-R13 & 2018-R15 -- 2018 RC, 2018 QW1, 144332
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 4 September '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2358 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 QSJPL Sentry15312084-211631.26353e-06-6.70-6.780JPL: Computed at 07:56 today Pacific time based on 56 observations spanning 15.799 days (2018-Aug-18.47984 to 2018-Sep-03.279282). Diameter approximately 0.020 km. from weighted mean H=26.19.

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 4 September '18

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

0017 9/5Grabbed MPEC 2018-R15 - 2018 RC - see above
1823Generated Traffic Report
1732Grabbed MPEC 2018-R14 - Comet 46P/Wirtanen - see above
1531Noted that JPL Sentry has updated its 2018 QS risk assessment - see above
Grabbed MPEC 2018-R11 - 2018 QW1 - see above
Grabbed MPEC 2018-R12 - 2018 RB - see above
Grabbed MPEC 2018-R13 - Daily Orbit Update - see above