Contents  on 15 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 15 September '18

Twenty objects reported inside ten LD

Twenty asteroids are reported within ten lunar distances (LD) of our planet today. Nearest are 2018 RE5, which passes us at 1.48 LD and the Moon at 0.97 LD, then leaves Earth's sphere of gravitational influence (SOI), moving out to 3.26 LD, and 2018 RB6, which enters the SOI, coming in from 3.97 to 1.64 LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41, 5.0 & 10.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
0.13 LD Sept. 12 2018 RZ5 4 m  9.65 to 14.11 LD Sept. 10 - 15 intruder, exits ten LD
0.44 LD Sept. 8 2018 RW 3 m  9.04 to 10.38 LD Aug. 31 - today intruder, NHATS target, exits ten LD, risk
0.58 LD Sept. 9 2018 RC 36 m  6.27 to 7.40 LD Aug. 31 - Sept. 18 intruder, NHATS target - DOU
1.48 LD today 2018 RE5 11 m  1.48 LD Sept. 12 - 18 Moon buzzer, Moon closest 0.97 LD at
0344 UTC, Earth closest at 0346 UTC
1.52 LD tomorrow 2018 RB6 23 m  1.64 from 3.97 LD Sept. 12 - 19 enters Earth SOI - DOU
1.64 LD Sept. 12 2018 RT5 22 m  6.11 to 8.14 LD Sept. 7 - 16
1.84 LD Sept. 13 2018 RE3 13 m  3.84 to 5.97 LD Sept. 9 - 17 NHATS target
2.28 LD Sept. 9 2018 RD4 7 m  7.63 to 8.93 LD Sept. 2 - 16 NHATS target
2.40 LD Sept. 10 2018 RA1 18 m  9.36 to 11.56 LD Sept. 6 - 15 exits ten LD
2.41 LD Sept. 17 2018 RK6 9 m  3.16 from 4.23 LD Sept. 10 - 24 NHATS target - DOU
2.45 LD Sept. 11 2018 RB1 10 m  6.67 to 8.39 LD Sept. 6 - 16 NHATS target
3.22 LD Sept. 12 2018 RR4 13 m  5.86 to 7.60 LD Sept. 7 - 17
4.06 LD Sept. 24 2018 RQ1 52 m  7.36 from 7.94 LD Sept. 11 - Oct. 8 NHATS target, risk - DOU
4.39 LD Sept. 12 2018 RD5 23 m  6.07 to 7.15 LD Sept. 5 - 18 NHATS target - DOU
4.49 LD tomorrow 2018 RG5 14 m  4.72 from 5.57 LD Sept. 11 - 21 NHATS target - DOU
4.71 LD Sept. 12 2018 RA6 28 m  7.60 to 10.07 LD Sept. 9 - 15 exits ten LD
5.29 LD Sept. 9 2018 RO5 29 m  9.66 to 11.04 LD Sept. 4 - 15 NHATS target, exits ten LD - DOU
7.4   LD Sept. 9* 2018 RR5 20 m  9.8 to 10.6 LD Sept. 3 - 15 EPU +/- 5 mins.*, NHATS target, exits ten LD
8.00 LD tomorrow 2018 RA2 27 m  8.17 from 8.84 LD Sept. 13 - 19 NHATS target - DOU
9.74 LD today 2018 RQ2 89 m  9.74 LD yesterday - tomorrow Earth closest at 0814 UTC - DOU

This report was generated at 1940 UTC with follow-up in today's DOU MPEC for nine objects in the active traffic table above and for seven departed objects: 2018 RE and risk-listed objects 2018 RP5, 2018 RF5, 2018 RY3, 2018 RH3, 2018 QS, and intruder 2018 RJ3, as well as for two distant objects: 2007 VD12 and 450894 2008 BT18.

Approaching Traffic - sorted by 10-LD bubble entry date
8.50 LD Sept. 20 2017 SL16 23 m  11.00 from 11.96 LD Sept. 17 - 24 NHATS target
8.6   LD Sept. 22* 2018 RH6 11 m  12.6 from 13.6 LD Sept. 19 - 26 EPU +/- 11 mins.*, NHATS target
* EPU = Earth passage uncertainty



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. "Distant" is used here to describe objects that have approached Earth within ten LD since A/CC began these traffic reports eleven years ago but are not currently coming so close. 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 15 September '18

The MPC's NEO Confirmation Page has 43 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 43 objects listed. Of these, seventeen were "one nighters." So far The Tracking News has counted a total of 75 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 15 September '18

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been nineteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-R196 - "23:50 UT" - 2018 RO7


MPEC 2018-R195 - "23:45 UT" - 2018 RN7


MPEC 2018-R194 - "23:40 UT" - 2018 RM7


MPEC 2018-R193 - "23:32 UT" - 2018 RL7


MPEC 2018-R192 - "23:27 UT" - 2018 RK7


MPEC 2018-R191 - "23:23 UT" - 2018 RJ7


MPEC 2018-R190 - "23:18 UT" - 2018 RH7


MPEC 2018-R189 - "23:13 UT" - 2018 RG7


MPEC 2018-R188 - "23:08 UT" - 2018 RF7


MPEC 2018-R187 - "23:03 UT" - 2018 RE7


MPEC 2018-R186 - "22:58 UT" - 2018 RD7


MPEC 2018-R185 - "22:54 UT" - 2018 RC7


MPEC 2018-R184 - "22:49 UT" - 2018 RB7


MPEC 2018-R183 - "22:44 UT" - 2018 RA7


MPEC 2018-R182 - "22:39 UT" - 2018 RZ6


MPEC 2018-R181 - "22:33 UT" - 2018 RY6


MPEC 2018-R180 - "22:29 UT" - 2018 RX6


MPEC 2018-R179 - "22:21 UT" - 2018 RW6


<< DOU on 15 Sept. '18 >>  MPEC 2018-R178 - "12:04 UT" - Daily Orbit Update

Observers  on 15 September '18

A total of 34 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2018-R186 -- 2018 RD7
H21Astronomical Research Obs. Westfield in Illinois, 16 in MPECs 2018-R179, 2018-R180, 2018-R181, 2018-R182, 2018-R183, 2018-R185, 2018-R186, 2018-R188, 2018-R189, 2018-R190, 2018-R191, 2018-R192, 2018-R193, 2018-R194, 2018-R195 & 2018-R196 -- 2018 RZ6, 2018 RY6, 2018 RX6, 2018 RW6, 2018 RO7, 2018 RN7, 2018 RM7, 2018 RL7, 2018 RK7, 2018 RJ7, 2018 RH7, 2018 RG7, 2018 RF7, 2018 RD7, 2018 RC7, 2018 RA7
T05ATLAS Haleakala in Hawaii, 14 in MPEC 2018-R178 -- 2018 RW3, 2018 PJ22, 2018 NB, 2015 FP118, 2011 UA, 2009 SX1, 2004 QB17, 2002 PH80, 65733, 457260, 115052, 5143, 3691, 1865
T08ATLAS Mauna Loa in Hawaii, 9 in MPEC 2018-R178 -- 2018 MM8, 2018 GA5, 54789, 450894, 443923, 439313, 140333, 4596, 4401
160Castelmartini Obs. in Italy, 6 in MPEC 2018-R178 -- 2018 RP5, 2018 RF6, 2018 RA2, 86324, 518635, 438429
703Catalina Sky Survey (CSS) in Arizona, 16 in MPECs 2018-R178, 2018-R186, 2018-R187 & 2018-R196 -- 2018 RO7, 2018 RO5, 2018 RE7, 2018 RD7, 2015 FP118, 2010 VB72, 1999 RB32, 66008, 53789, 504800, 413563, 413260, 144332, 115052, 3691, 2061
V06Catalina Sky Survey Kuiper Telescope in Arizona, 1 in MPEC 2018-R178 -- 2016 QC84
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2018-R178 & 2018-R185 -- 2018 RC7, 2018 PQ9, 2018 GQ5
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2018-R186 -- 2018 RD7
K88GINOP-KHK in Hungary, 2 in MPECs 2018-R186 & 2018-R196 -- 2018 RO7, 2018 RD7
J95Great Shefford Obs. in England, 4 in MPECs 2018-R180, 2018-R186, 2018-R194 & 2018-R195 -- 2018 RX6, 2018 RN7, 2018 RM7, 2018 RD7
A17Guidestar Obs. in Germany, 1 in MPEC 2018-R196 -- 2018 RO7
Q63LCO Siding Spring A in New South Wales, 1 in MPEC 2018-R195 -- 2018 RN7
711McDonald Obs. in Texas, 7 in MPECs 2018-R179, 2018-R180, 2018-R181, 2018-R188, 2018-R189, 2018-R191 & 2018-R196 -- 2018 RY6, 2018 RX6, 2018 RW6, 2018 RO7, 2018 RJ7, 2018 RG7, 2018 RF7
474Mt. John Obs. in New Zealand, 7 in MPECs 2018-R178, 2018-R186 & 2018-R194 -- 2018 RZ1, 2018 RY1, 2018 RO2, 2018 RM7, 2018 RH3, 2018 RD7, 2018 RC2
G96Mt. Lemmon Survey (MLS) in Arizona, 47 in MPECs 2018-R178, 2018-R179, 2018-R180, 2018-R181, 2018-R182, 2018-R183, 2018-R184, 2018-R185, 2018-R188, 2018-R189, 2018-R190, 2018-R191, 2018-R192, 2018-R193, 2018-R194 & 2018-R195 -- 2018 RZ6, 2018 RY6, 2018 RY3, 2018 RX6, 2018 RX3, 2018 RX, 2018 RW6, 2018 RS5, 2018 RQ1, 2018 RO2, 2018 RN7, 2018 RM7, 2018 RL7, 2018 RK7, 2018 RJ7, 2018 RH7, 2018 RG7, 2018 RF7, 2018 RC7, 2018 RC2, 2018 RB7, 2018 RA7, 2018 PK22, 2018 KR2, 2015 VW1, 2014 SM143, 2013 RX80, 2008 RT26, 2008 PH9, 2006 TH7, 2003 RC2, 2003 ED50, 2001 OD3, 87311, 478574, 445775, 422977, 407338, 376788, 350988, 285838, 253106, 21277, 18109, 163250, 162687, 106589
I41Palomar Transient Factory (PTF) in southern California, 13 in MPEC 2018-R178 -- 2018 RL2, 2018 RD5, 2007 RX19, 2004 QB17, 68359, 470310, 454177, 442742, 422977, 413260, 350988, 18882, 153591
K63Pascoli Obs. in Italy, 3 in MPECs 2018-R178, 2018-R180 & 2018-R196 -- 2018 RX6, 2018 RO7, 2018 RK6
122Pises Obs. in France, 1 in MPEC 2018-R178 -- 2002 OS4
W98Polonia Obs. in Chile, 2 in MPEC 2018-R178 -- 2008 RT26, 17511
B04Saint-Barthelemy Obs. in Italy, 2 in MPECs 2018-R178 & 2018-R196 -- 2018 RO7, 2018 RK6
104San Marcello Pistoiese Obs. in Italy, 8 in MPECs 2018-R178, 2018-R180, 2018-R185, 2018-R186, 2018-R190, 2018-R194, 2018-R195 & 2018-R196 -- 2018 RX6, 2018 RO7, 2018 RN7, 2018 RM7, 2018 RK6, 2018 RH7, 2018 RD7, 2018 RC7
H36Sandlot Obs. in Kansas, 1 in MPEC 2018-R186 -- 2018 RD7
C95SATINO-1 in France, 1 in MPEC 2018-R178 -- 4183
033Schwarzschild Obs. in Germany, 6 in MPECs 2018-R178, 2018-R190, 2018-R191, 2018-R192 & 2018-R196 -- 2018 RO7, 2018 RK7, 2018 RJ7, 2018 RH7, 2018 RF6, 2018 RB6
691Spacewatch 0.9m telescope in Arizona, 8 in MPECs 2018-R178, 2018-R181 & 2018-R182 -- 2018 RZ6, 2018 RY6, 2018 RY3, 2018 PT21, 2018 JC3, 2014 SM143, 2007 VD12, 513358
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2018-R178 & 2018-R188 -- 2018 RY1, 2018 RT3, 2018 RJ3, 2018 RH3, 2018 RF7, 2018 RF5, 2018 RE, 2017 WG2, 2016 VS5
I52Steward Obs. Mt. Lemmon Station in Arizona, 43 in MPECs 2018-R178, 2018-R179, 2018-R180, 2018-R181, 2018-R182, 2018-R184, 2018-R185, 2018-R186, 2018-R187, 2018-R188, 2018-R189, 2018-R190, 2018-R191, 2018-R192, 2018-R193, 2018-R194, 2018-R195 & 2018-R196 -- 2018 RZ6, 2018 RZ2, 2018 RZ1, 2018 RY6, 2018 RY, 2018 RX6, 2018 RX3, 2018 RW6, 2018 RW3, 2018 RW1, 2018 RV3, 2018 RU1, 2018 RT3, 2018 RS3, 2018 RS1, 2018 RQ4, 2018 RQ2, 2018 RO7, 2018 RN7, 2018 RN4, 2018 RM7, 2018 RL7, 2018 RK7, 2018 RJ7, 2018 RH7, 2018 RH5, 2018 RH3, 2018 RG7, 2018 RG5, 2018 RF7, 2018 RF5, 2018 RE7, 2018 RD7, 2018 RD5, 2018 RC7, 2018 RC4, 2018 RB7, 2018 RB5, 2018 RB, 2018 RA5, 2018 RA4, 2018 QV1, 2016 RP1
A98Taurus-1 Obs. in Belarus, 1 in MPEC 2018-R178 -- 2015 FP118
926Tenagra II Obs. in Arizona, 3 in MPECs 2018-R179, 2018-R182 & 2018-R184 -- 2018 RZ6, 2018 RW6, 2018 RB7
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPEC 2018-R178 -- 2018 RC, 2018 QS, 2018 PB20, 2010 WZ8
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2018-R178 -- 2010 WZ8
718Wiggins Obs. in Utah, 1 in MPEC 2018-R178 -- 144332
C51WISE in Earth polar orbit, 1 in MPEC 2018-R178 -- 1627
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 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 RB7JPL Sentry23582093-209313.121e-07-4.92-4.920JPL: Computed at 16:56 today Pacific time based on 19 observations spanning 2.9720 days (2018-Sep-12.46817 to 2018-Sep-15.4402). Diameter approximately 0.180 km. from weighted mean H=21.42.
2018 RP5JPL Sentry16032109-210911.450e-08-8.60-8.600JPL: Computed at 08:51 today Pacific time based on 28 observations spanning 1.6998 days (2018-Sep-13.23362 to 2018-Sep-14.93342). Diameter approximately 0.020 km. from weighted mean H=26.16.
NEODyS1500210911.7e-08-8.56-8.560NEODyS: "Based on 24 optical observations (of which 1 are rejected as outliers) from 2018-09-13.234 to 2018-09-14.500."
2018 RF5JPL Sentry16032069-211533.16723e-06-7.00-7.140JPL: Computed at 08:48 today Pacific time based on 32 observations spanning 3.0952 days (2018-Sep-12.23986 to 2018-Sep-15.33503). Diameter approximately 0.011 km. from weighted mean H=27.41.
NEODyS15002069-211561.06e-05-6.40-6.770NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2018-09-12.241 to 2018-09-13.470."
2018 RQ4JPL Sentry16032084-211192.7728713e-06-6.82-7.360JPL: Computed at 08:51 today Pacific time based on 26 observations spanning 4.0317 days (2018-Sep-11.2811 to 2018-Sep-15.31279). Diameter approximately 0.015 km. from weighted mean H=26.81.
2018 RY3NEODyS1500R E M O V E D-
2018 RT3JPL Sentry1700R E M O V E DJPL: Risk listing removed at 1604 UTC today
2018 RJ3JPL Sentry17002070-207011.545e-06-7.28-7.280JPL: Computed at 09:12 today Pacific time based on 36 observations spanning 5.7837 days (2018-Sep-09.56735 to 2018-Sep-15.35105). Diameter approximately 0.009 km. from weighted mean H=27.78.
2018 RH3JPL Sentry1700R E M O V E DJPL: Risk listing removed at 1606 UTC today
NEODyS15002097-210861.72e-08-8.58-8.580NEODyS: "Based on 60 optical observations (of which 0 are rejected as outliers) from 2018-09-09.440 to 2018-09-14.186."
2018 RY1JPL Sentry16032040-2091101.451234e-07-6.40-6.480JPL: Computed at 08:54 today Pacific time based on 59 observations spanning 8.0257 days (2018-Sep-07.13874 to 2018-Sep-15.16439). Diameter approximately 0.045 km. from weighted mean H=24.39.
NEODyS15002040-2106204.76e-07-6.02-6.540NEODyS: "Based on 53 optical observations (of which 0 are rejected as outliers) from 2018-09-07.140 to 2018-09-14.210."
2018 RR1NEODyS15002080-2118331.16e-05-7.75-8.39n/aNEODyS: "Based on 30 optical observations (of which 1 are rejected as outliers) from 2018-09-07.394 to 2018-09-11.266."
2018 RQ1JPL Sentry16032117-211717.751e-08-7.19-7.190JPL: Computed at 08:42 today Pacific time based on 79 observations spanning 7.9987 days (2018-Sep-07.38051 to 2018-Sep-15.37921). Diameter approximately 0.052 km. from weighted mean H=24.07.
2018 QSJPL Sentry15302084-211631.97631e-06-6.52-6.590JPL: Computed at 08:27 today Pacific time based on 71 observations spanning 24.849 days (2018-Aug-18.47984 to 2018-Sep-12.329). Diameter approximately 0.019 km. from weighted mean H=26.23.

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 15 September '18

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

2358Noted that JPL Sentry has posted 2018 RB7 as an impact risk - see above
Grabbed MPEC 2018-R193 - 2018 RL7 - see above
Grabbed MPEC 2018-R194 - 2018 RM7 - see above
Grabbed MPEC 2018-R195 - 2018 RN7 - see above
Grabbed MPEC 2018-R196 - 2018 RO7 - see above
2330Grabbed MPEC 2018-R187 - 2018 RE7 - see above
Grabbed MPEC 2018-R188 - 2018 RF7 - see above
Grabbed MPEC 2018-R189 - 2018 RG7 - see above
Grabbed MPEC 2018-R190 - 2018 RH7 - see above
Grabbed MPEC 2018-R191 - 2018 RJ7 - see above
Grabbed MPEC 2018-R192 - 2018 RK7 - see above
2303Grabbed MPEC 2018-R179 - 2018 RW6 - see above
Grabbed MPEC 2018-R180 - 2018 RX6 - see above
Grabbed MPEC 2018-R181 - 2018 RY6 - see above
Grabbed MPEC 2018-R182 - 2018 RZ6 - see above
Grabbed MPEC 2018-R183 - 2018 RA7 - see above
Grabbed MPEC 2018-R184 - 2018 RB7 - see above
Grabbed MPEC 2018-R185 - 2018 RC7 - see above
Grabbed MPEC 2018-R186 - 2018 RD7 - see above
1940Generated Traffic Report
1700Noted that JPL Sentry has removed 2018 RH3 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 RJ3 risk assessment - see above
Noted that JPL Sentry has removed 2018 RT3 as an impact risk - see above
1603Noted that JPL Sentry has updated its 2018 RF5 risk assessment - see above
Noted that JPL Sentry has updated its 2018 RP5 risk assessment - see above
Noted that JPL Sentry has reposted 2018 RQ1 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 RQ4 risk assessment - see above
Noted that JPL Sentry has updated its 2018 RY1 risk assessment - see above
1530Noted that JPL Sentry has updated its 2018 QS risk assessment - see above
1500Noted that NEODyS has updated its 2018 RF5 risk assessment - see above
Noted that NEODyS has updated its 2018 RH3 risk assessment - see above
Noted that NEODyS has posted 2018 RP5 as an impact risk - see above
Noted that NEODyS has updated its 2018 RR1 risk assessment - see above
Noted that NEODyS has updated its 2018 RY1 risk assessment - see above
Noted that NEODyS has removed 2018 RY3 as an impact risk - see above
Grabbed MPEC 2018-R178 - Daily Orbit Update - see above