Contents  on 23 October '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 October '18

Six objects reported inside ten LD

Bulletin - 1634, updated 2101 & 2333 UTC:  Five new discoveries of close passers have been announced. The two with their own MPECs were fully processed into NASA/JPL Horizons. Three belated discoveries announced in today's DOU MPEC were also added to Horizons but using Minor Planet Center orbit solutions without uncertainty ratings. New observations for five other close passers in the DOU was not processed into Horizons, and without that we cannot complete our daily traffic report, so there'll be no report today. We should be able to pick up the pieces tomorrow, but please note that, coincidentally, all A/CC news reporting will update less frequently for a few days, and there may be days without traffic reports. All object observations, however, will be caught and published.

Earth passageI D~Size~Inside ten LDNotes
~1.2 LD ~Sept. 192018 SV1334 m Sept. 13 - 24DOU
~1.7 LD ~Oct. 22018 TS68 m Sept. 26 - Oct. 8DOU
~2.0 LD ~Oct. 72018 TT63 m Sept. 28 - Oct. 16DOU
7.42 LD at 2130 UTC Nov. 42018 UY154 m Nov. 1 - 9MPEC
9.41 LD at 0507 UTC today2018 UC2135 m yesterday - Oct. 24MPEC



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.

NEOCP Activity  on 23 October '18

The MPC's NEO Confirmation Page has 20 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 20 objects listed. Of these, twelve 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 23 October '18

Minor Planet Electronic Circulars

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


MPEC 2018-U62 - "20:45 UT" - 2018 UC2


<< DOU on 23 Oct. '18 >>  MPEC 2018-U61 - "12:07 UT" - Daily Orbit Update


MPEC 2018-U60 - "10:36 UT" - 2018 UW1


MPEC 2018-U59 - "10:30 UT" - 2018 UY1


MPEC 2018-U58 - "10:27 UT" - 2018 UX1


MPEC 2018-U57 - "10:23 UT" - 2018 UV1

Observers  on 23 October '18

A total of 36 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 10 in MPECs 2018-U58, 2018-U59, 2018-U60, 2018-U61 & 2018-U62 -- 2018 UY1, 2018 UX1, 2018 UW1, 2018 US1, 2018 UM1, 2018 UE1, 2018 UC2, 2018 UA1, 2018 SR2, 2018 RL
T05ATLAS Haleakala in Hawaii, 17 in MPECs 2018-U61 & 2018-U62 -- 2018 UJ1, 2018 UH1, 2018 UC2, 2018 TS6, 2018 RJ7, 68216, 53789, 518463, 418929, 36284, 25916, 162687, 4954, 4953, 2100, 1627, 719
T08ATLAS Mauna Loa in Hawaii, 16 in MPECs 2018-U61 & 2018-U62 -- 2018 UC2, 2013 UG1, 2009 SV17, 88263, 86324, 65733, 523604, 468481, 457260, 455550, 450779, 443923, 414903, 17274, 12538, 3691
C77Bernezzo Obs. in Italy, 1 in MPEC 2018-U62 -- 2018 UC2
160Castelmartini Obs. in Italy, 9 in MPEC 2018-U61 -- 2018 RV5, 2018 PE22, 2018 NB, 2013 UG1, 65733, 54401, 523604, 349507, 16834
K51Celado Obs. in Italy, 3 in MPECs 2018-U58, 2018-U60 & 2018-U62 -- 2018 UX1, 2018 UW1, 2018 UC2
W84%program code "%" (14) via DECam in Chile, 1 in MPEC 2018-U61 -- 2016 JP38
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2018-U62 -- 2018 UC2
E89Geyserland Obs. in New Zealand, 1 in MPEC 2018-U61 -- 418929
J95Great Shefford Obs. in England, 4 in MPECs 2018-U58, 2018-U60, 2018-U61 & 2018-U62 -- 2018 UX1, 2018 UW1, 2018 US1, 2018 UC2
A17Guidestar Obs. in Germany, 2 in MPECs 2018-U60 & 2018-U62 -- 2018 UW1, 2018 UC2
U691Ernesto Guido in Italy via iTelescope Obs. Auberry in northern California, 1 in MPEC 2018-U62 -- 2018 UC2
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-U62 -- 2018 UC2
585Kiev Comet Station in Ukraine, 3 in MPECs 2018-U59, 2018-U60 & 2018-U62 -- 2018 UY1, 2018 UW1, 2018 UC2
K30Luscherz Obs. in Switzerland, 1 in MPEC 2018-U62 -- 2018 UC2
K38M57 Obs. in Italy, 3 in MPECs 2018-U59, 2018-U60 & 2018-U62 -- 2018 UY1, 2018 UW1, 2018 UC2
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2018-U57, 2018-U58, 2018-U60 & 2018-U62 -- 2018 UX1, 2018 UW1, 2018 UV1, 2018 UC2
932McCarthy Obs. in Connecticut, 1 in MPEC 2018-U62 -- 2018 UC2
118Modra Obs. in Slovakia, 1 in MPEC 2018-U61 -- 2018 SV13
108Montelupo Obs. in Italy, 1 in MPEC 2018-U62 -- 2018 UC2
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2018-U57, 2018-U58, 2018-U59, 2018-U60 & 2018-U61 -- 2018 UY1, 2018 UX1, 2018 UW1, 2018 UV1, 2018 TT6
C82Nastro Verde Obs. in Italy, 1 in MPEC 2018-U62 -- 2018 UC2
J69North Obs. in England, 1 in MPEC 2018-U62 -- 2018 UC2
Z80Northolt Branch Obs. in England, 1 in MPEC 2018-U62 -- 2018 UC2
C23Olmen Obs. in Belgium, 1 in MPEC 2018-U62 -- 2018 UC2
F52Pan-STARRS 2 (PS2) in Hawaii, 9 in MPECs 2018-U59 & 2018-U61 -- 2018 UY1, 2015 NU2, 2001 QA143, 514652, 457260, 413260, 381564, 159495, 2212
A48Povegliano Veronese Obs. in Italy, 2 in MPEC 2018-U61 -- 2018 TQ2, 2018 RL
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2018-U61 -- 2018 SV13
W25RMS Obs., 2 in MPECs 2018-U60 & 2018-U62 -- 2018 UW1, 2018 UC2
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2018-U62 -- 2018 UC2
C95SATINO-1 in France, 2 in MPECs 2018-U61 & 2018-U62 -- 2018 UC2, 2018 RL
204Schiaparelli Obs. in Italy, 4 in MPECs 2018-U58, 2018-U59, 2018-U60 & 2018-U62 -- 2018 UY1, 2018 UX1, 2018 UW1, 2018 UC2
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2018-U62 -- 2018 UC2
I52Steward Obs. Mt. Lemmon Station in Arizona, 6 in MPECs 2018-U57, 2018-U58, 2018-U59, 2018-U60 & 2018-U61 -- 2018 UY1, 2018 UX1, 2018 UW1, 2018 UV1, 2018 TT6, 2018 TS6
L01Visnjan Obs., 5 in MPECs 2018-U57, 2018-U58, 2018-U59, 2018-U60 & 2018-U62 -- 2018 UY1, 2018 UX1, 2018 UW1, 2018 UV1, 2018 UC2
718Wiggins Obs. in Utah, 1 in MPEC 2018-U62 -- 2018 UC2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 October '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 and NEODyS listings is 100 years, and both post impact solutions beyond that for some 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 UO1NEODyS1630206513.03e-10-10.37-10.370NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2018-10-20.392 to 2018-10-21.380."
2018 UM1NEODyS16302063-2117951.64e-05-4.36-4.970NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2018-10-19.146 to 2018-10-21.208."
2018 UHNEODyS16302059-211043.39e-07-5.79-5.870NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2018-10-17.338 to 2018-10-22.250."
2018 TJ6NEODyS16302064-2118242.86e-06-5.13-5.5-NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2018-10-15.516 to 2018-10-20.403."
2018 TZ4NEODyS1630R E M O V E D-
2018 TBNEODyS16302095-210328.45e-07-6.30-6.320NEODyS: "Based on 182 optical observations (of which 1 are rejected as outliers) from 2018-10-02.423 to 2018-10-21.501."
2010 KV21JPL Sentry18062021-2116172.3917e-08-3.14-3.320JPL: Computed at 11:01 today Pacific time based on 20 observations spanning 4.2997 days (2010-May-17.927225 to 2010-May-22.22691). Diameter approximately 1.200 km. from weighted mean H=17.25.
2008 UM1JPL Sentry18062021-207375.35401e-07-8.28-8.340JPL: Computed at 15:22 April 7th of 2017 Pacific time based on 9 observations spanning .03061 days (2008-Oct-22.39434 to 2008-Oct-22.42495). Diameter approximately 0.002 km. from weighted mean H=31.60.

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 October '18

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

2100Grabbed MPEC 2018-U62 - 2018 UC2 - see above
1806Noted that JPL Sentry has updated its 2008 UM1 risk assessment - see above
Noted that JPL Sentry has posted 2010 KV21 as an impact risk - see above
1634Generated Traffic Report
1630Noted that NEODyS has updated its 2018 TB risk assessment - see above
Noted that NEODyS has updated its 2018 TJ6 risk assessment - see above
Noted that NEODyS has removed 2018 TZ4 as an impact risk - see above
Noted that NEODyS has updated its 2018 UH risk assessment - see above
Noted that NEODyS has posted 2018 UM1 as an impact risk - see above
Noted that NEODyS has posted 2018 UO1 as an impact risk - see above
Grabbed MPEC 2018-U57 - 2018 UV1 - see above
Grabbed MPEC 2018-U58 - 2018 UX1 - see above
Grabbed MPEC 2018-U59 - 2018 UY1 - see above
Grabbed MPEC 2018-U60 - 2018 UW1 - see above
Grabbed MPEC 2018-U61 - Daily Orbit Update - see above