Contents  on 28 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 28 September '18

Three objects reported inside ten LD

Three asteroidal objects are reported less than ten lunar distances (LD) from our planet today. All three are outbound, with the nearest, 2018 RQ1, moving away from 4.56 to 4.91 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
4.06 LD Sept. 24 2018 RQ1 51 m  4.56 to 4.91 LD Sept. 11 - Oct. 8 NHATS target
6.50 LD yesterday 2018 SS1 62 m  7.08 to 8.85 LD Sept. 24 - 29 DOU
6.79 LD yesterday 2018 SM1 90 m  6.82 to 7.05 LD Sept. 21 - Oct. 3 NHATS target - DOU

This report was generated at 2246 UTC with the recovery of distant 2007 TV18 in today's DOU MPEC along with follow-up for two active objects in the traffic table (above) and for five departed objects: 2018 SD1, 2018 RR5, 2018 RO5, 2018 QW1, and 2018 LQ2.



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 an object that has come within ten LD since A/CC began these traffic reports (2007) but is not presently 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 28 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, nine were "one nighters." So far The Tracking News has counted a total of 23 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 28 September '18

Minor Planet Electronic Circulars

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


<< DOU on 28 Sept. '18 >>  MPEC 2018-S67 - "12:03 UT" - Daily Orbit Update


MPEC 2018-S66 - "03:47 UT" - 2017 WV13

Observers  on 28 September '18

A total of 40 observers appear in today's MPECs.

CodeObserver / observatory
C97Al-Fulaij Obs., 12 in MPEC 2018-S67 -- 86324, 518635, 455594, 438429, 418929, 31345, 17274, 13553, 12711, 115052, 1627, 719
H21Astronomical Research Obs. Westfield in Illinois, 12 in MPEC 2018-S67 -- 2018 RX5, 2018 RW5, 2018 RS5, 2018 RO7, 2018 RC6, 2018 QU, 2018 QQ1, 2018 NR, 2018 NO1, 2001 QP181, 523595, 153951
T05ATLAS Haleakala in Hawaii, 5 in MPEC 2018-S67 -- 523788, 523641, 523628, 523619, 523603
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2018-S67 -- 523779
160Castelmartini Obs. in Italy, 20 in MPEC 2018-S67 -- 2018 SS1, 86324, 68950, 523788, 523779, 523631, 523619, 523604, 523603, 523587, 518635, 481394, 455594, 438429, 418929, 414960, 413260, 17274, 12711, 105140
703Catalina Sky Survey (CSS) in Arizona, 3 in MPEC 2018-S67 -- 523668, 523604, 523603
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2018-S67 -- 523670
151Eschenberg Obs. in Switzerland, 2 in MPEC 2018-S67 -- 523631, 523619
F652Lothar Kurtze in Germany via Faulkes Telescope North in Hawaii, 2 in MPEC 2018-S67 -- 2018 RW3, 2018 QT
K83Forti Obs., 1 in MPEC 2018-S67 -- 523788
J95Great Shefford Obs. in England, 3 in MPEC 2018-S67 -- 2018 SS1, 2018 SR1, 2018 SM1
238Grorudalen Obs. in Norway, 1 in MPEC 2018-S67 -- 523788
A17Guidestar Obs. in Germany, 5 in MPEC 2018-S67 -- 2018 SR1, 2018 SM1, 2018 RS1, 2018 LQ2, 523610
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 5 in MPEC 2018-S67 -- 2018 RY1, 2018 QT, 2018 OB1, 2018 EB, 2010 VD72
Z43Landehen Obs., 1 in MPEC 2018-S67 -- 2018 SS1
K38M57 Obs. in Italy, 1 in MPEC 2018-S67 -- 2018 SM1
B67Mirasteilas Obs. in Switzerland, 3 in MPEC 2018-S67 -- 523788, 523631, 523604
J69North Obs. in England, 1 in MPEC 2018-S67 -- 2018 SS1
Z80Northolt Branch Obs. in England, 1 in MPEC 2018-S67 -- 2018 SR1
G34Oberfrauendorf Obs. in Germany, 2 in MPEC 2018-S67 -- 2018 SR1, 523788
C23Olmen Obs. in Belgium, 1 in MPEC 2018-S67 -- 2011 UA
I41Palomar Transient Factory (PTF) in southern California, 12 in MPEC 2018-S67 -- 523788, 523670, 523631, 523592, 457260, 454177, 443923, 31210, 250697, 197588, 3691, 1943
F52Pan-STARRS 2 (PS2) in Hawaii, 2 in MPEC 2018-S67 -- 523664, 523595
A53Peschiera del Garda Obs. in Italy, 2 in MPEC 2018-S67 -- 2018 SM1, 2018 KE3
247roving observer, 1 in MPEC 2018-S67 -- 2018 SR1
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-S67 -- 523779
H36Sandlot Obs. in Kansas, 3 in MPEC 2018-S67 -- 2018 SK1, 2018 RC1, 2018 QV1
C95SATINO-1 in France, 3 in MPEC 2018-S67 -- 2018 SD1, 523619, 17274
0948program code 8 via Simeis Obs. in Ukraine, 1 in MPEC 2018-S67 -- 2018 SR1
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-S67 -- 2018 SS1
Y00SONEAR in Brazil, 1 in MPEC 2018-S67 -- 18109
587Sormano Obs. in Italy, 2 in MPEC 2018-S67 -- 2018 SM1, 2018 EB
691Spacewatch 0.9m telescope in Arizona, 20 in MPEC 2018-S67 -- 2018 SK1, 2018 RW7, 2018 RW1, 2018 RU3, 2018 RU1, 2018 RO2, 2018 RM2, 2018 QV1, 2018 PX7, 2018 PK22, 2018 NN, 2018 LQ2, 2018 KV, 2018 FY1, 2017 SN16, 2013 LB, 2010 AK, 2007 TV18, 2007 ML24, 2003 SQ15
291Spacewatch 1.8m telescope in Arizona, 13 in MPEC 2018-S67 -- 2018 RR5, 2018 RO5, 2018 RG7, 2018 RB, 2018 RA8, 2018 QT, 2018 FO3, 2018 ED4, 2017 NK, 2017 MU8, 2015 HR11, 2014 SM143, 2009 ST103
C36Starry Wanderer Obs. in Belarus, 1 in MPEC 2018-S67 -- 523788
I52Steward Obs. Mt. Lemmon Station in Arizona, 25 in MPEC 2018-S67 -- 2018 SS1, 2018 SK1, 2018 SD1, 2018 RZ2, 2018 RX7, 2018 RX, 2018 RW7, 2018 RW3, 2018 RU1, 2018 RT7, 2018 RS1, 2018 RQ5, 2018 RO5, 2018 RO2, 2018 RM2, 2018 RL6, 2018 RL2, 2018 RJ7, 2018 RA4, 2018 QW1, 2018 QV1, 2018 PS7, 2018 PK22, 2018 PE22, 2018 LO6
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPECs 2018-S66 & 2018-S67 -- 2018 GA4, 2018 EB, 2017 WV13, 2014 US
G33Wickede Obs. in Germany, 1 in MPEC 2018-S67 -- 523788
718Wiggins Obs. in Utah, 2 in MPEC 2018-S67 -- 2018 SR1, 2018 SM1
C51WISE in Earth polar orbit, 3 in MPEC 2018-S67 -- 2018 RW27, 37336, 180186
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 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 RY1JPL Sentry15302040-211131.105414e-07-6.55-6.590JPL: Computed at 07:45 today Pacific time based on 65 observations spanning 20.983 days (2018-Sep-07.13874 to 2018-Sep-28.12192). Diameter approximately 0.044 km. from weighted mean H=24.41.

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 28 September '18

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

2246Generated Traffic Report
1530Noted that JPL Sentry has updated its 2018 RY1 risk assessment - see above
Grabbed MPEC 2018-S67 - Daily Orbit Update - see above
0400Grabbed MPEC 2018-S66 - 2017 WV13 - see above