Contents  on 18 October '12

Asteroid/Comet Connection (A/CC) Resources:

The latest A/CC news is available via framed access, RSS news feed RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.

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. And use the all-up news archive to access news from any time since A/CC began in early 2002. To keep track of what's new each day, watch the Chronology section.

Traffic Report  on 18 October '12

Seven objects reported inside ten LD

Seven objects are reported to be inside ten lunar distances (LD) of Earth today. Newly announced risk-listed 2012 UE enters Earth's Hill sphere, moving from 4.53 to 2.26 LD, and 2012 TQ146 exits Earth's Hill sphere, moving from 3.71 to 5.19 LD. Out further, 2012 TE79 is outbound from 5.75 to 6.31 LD, newly announced 2012 UF from 6.64 to 7.00 LD, and intruder 2012 TC4 (risk-listed radar target) from 8.52 to 10.00 LD. And 2012 TD79 comes its closest to Earth on this passage, reaching 7.19 LD at 2350 UTC, while 2012 TP231 is inbound from 9.00 to 7.82 LD

Coming our way next, newly announced 2012 UW9 is calculated with some uncertainty to arrive inside ten LD on October 27th, and returning 2010 JK1 arrives on November 22nd.

This report was updated at 1928 UTC with new discoveries 2012 UW9 (MPEC) and already departed 2012 UU9 (MPEC) and 2012 UT9 (MPEC), plus follow-up in today's DOU MPEC for 2012 UF, 2012 TD79, 2012 TP20, and 2012 TC4, as well as the recovery of 2012 SR56.

Today's first traffic report was generated at 0424 UTC with four new discoveries that were announced yesterday: 2012 UF (MPEC), 2012 UE (MPEC), and the already departed 2012 TU231 (MPEC) and 2012 TQ231 (MPEC).


Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) is estimated to extend out to around 3.89 LD. Object distances are interpreted by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

Radar Astrometry  on 18 October '12

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 2144 UTC when the database was dated 18 Oct.

NEOCP Activity  on 18 October '12

The MPC's NEO Confirmation Page has 62 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 62 objects listed. Of these, 44 were "one nighters." So far The Tracking News has counted a total of 86 listings on the NEOCP today.

New MPECs  on 18 October '12

Minor Planet Electronic Circulars

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


MPEC 2012-U42 - "22:20 UT" - 2012 TP274


MPEC 2012-U41 - "19:53 UT" - Comet P/2012 TK8 (Tenagra)


MPEC 2012-U40 - "19:11 UT" - Comet P/2012 T7 (Vorobjov)


MPEC 2012-U39 - "19:04 UT" - Comet C/2012 T6 (Kowalski)


MPEC 2012-U38 - "18:51 UT" - Comet C/2012 T5 (Bressi)


MPEC 2012-U37 - "16:31 UT" - 2012 UY9


MPEC 2012-U36 - "16:28 UT" - 2012 UX9


MPEC 2012-U35 - "16:25 UT" - 2012 UW9


MPEC 2012-U34 - "16:22 UT" - 2012 UV9


MPEC 2012-U33 - "16:12 UT" - 2012 UU9


MPEC 2012-U32 - "16:08 UT" - 2012 UT9


MPEC 2012-U31 - "16:04 UT" - 2012 US9


MPEC 2012-U30 - "16:01 UT" - 2012 TB259


MPEC 2012-U29 - "14:04 UT" - 2012 TA259


<< DOU on 18 Oct. '12 >>  MPEC 2012-U28 - "06:07 UT" - Daily Orbit Update


MPEC 2012-U27 - "01:00 UT" - 2012 TT256


MPEC 2012-U26 - "00:37 UT" - 2002 UZ30

Observers  on 18 October '12

A total of 52 observers appear in today's MPECs.

CodeObserver / observatory
H17Angel Peaks Obs. in Colorado, 1 in MPEC 2012-U38 -- C/2012 T5
H21Astronomical Research Obs. Westfield in Illinois, 17 in MPECs 2012-U26, 2012-U28, 2012-U38, 2012-U40 & 2012-U42 -- 2012 TZ79, 2012 TZ52, 2012 TT5, 2012 TS5, 2012 TS, 2012 TP274, 2012 TP20, 2012 TP139, 2012 TO139, P/2012 T7, C/2012 T5, 2012 SY2, 2012 SX20, 2012 RW16, 2012 RO15, 2012 PZ19, 2002 UZ30
300Bisei Spaceguard Center in Japan, 1 in MPEC 2012-U38 -- C/2012 T5
B96Brixiis Obs. in Belgium, 1 in MPEC 2012-U38 -- C/2012 T5
703Catalina Sky Survey (CSS) in Arizona, 19 in MPECs 2012-U28, 2012-U33 & 2012-U39 -- 2012 UU9, 2012 TS5, 2012 TM139, C/2012 T6, 2012 JS11, 2012 HO15, 2009 BD2, 2008 XE2, 2008 HV4, 2007 HZ, 2005 GQ21, 2002 UA31, 2002 TY68, 1999 HA2, 303262, 276397, 17182, 137044, 4587
470Ceccano Obs. in Italy, 2 in MPECs 2012-U38 & 2012-U40 -- P/2012 T7, C/2012 T5
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 21 in MPECs 2012-U27, 2012-U28, 2012-U29, 2012-U30, 2012-U32, 2012-U33, 2012-U34, 2012-U39 & 2012-U42 -- 2012 UV9, 2012 UU9, 2012 UT9, 2012 TT256, 2012 TS, 2012 TR139, 2012 TP274, 2012 TK123, 2012 TJ79, 2012 TH79, 2012 TB259, 2012 TA259, C/2012 T6, 2012 SK8, 2012 SK50, 2012 SG32, 2012 SD22, 2012 RG3, 2012 QJ45, 2012 QJ2, 2012 PG5
G58Chabot Obs. in northern California, 1 in MPEC 2012-U31 -- 2012 US9
822Cordoba Obs. in Argentina, 1 in MPEC 2012-U32 -- 2012 UT9
958Dax Obs. in France, 1 in MPEC 2012-U38 -- C/2012 T5
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2012-U28 -- 2012 TR20
113Drebach Obs. in Germany, 3 in MPECs 2012-U38, 2012-U39 & 2012-U40 -- P/2012 T7, C/2012 T6, C/2012 T5
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 8 in MPECs 2012-U27, 2012-U28 & 2012-U38 -- 2012 TY52, 2012 TU, 2012 TT256, 2012 TS78, 2012 TO139, 2012 TM20, 2012 TC43, C/2012 T5
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2012-U42 -- 2012 TP274
F65$Ernesto Guido in Italy via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-U40 -- P/2012 T7
F657Paul Roche in Wales via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-U38 -- C/2012 T5
E102Ernesto Guido in Italy via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-U39 -- C/2012 T6
E104program code 4 via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-U40 -- P/2012 T7
E109program code 9 via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-U28 -- 29075
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 214869
651Grasslands Obs. in Arizona, 1 in MPEC 2012-U29 -- 2012 TA259
J95Great Shefford Obs. in England, 1 in MPEC 2012-U42 -- 2012 TP274
D00ISON-Kislovodsk Obs., 2 in MPECs 2012-U28 & 2012-U40 -- P/2012 T7, 67399
C32Ka-Dar Obs. TAU Station in Russia, 1 in MPEC 2012-U40 -- P/2012 T7
704LINEAR in New Mexico, 62 in MPECs 2012-U28, 2012-U38 & 2012-U39 -- 2012 UF, 2012 TZ52, 2012 TX78, 2012 TT231, 2012 TS5, 2012 TS, 2012 TG53, 2012 TD79, C/2012 T6, C/2012 T5, 2012 SQ56, 2012 RV16, 2012 QO10, 2012 QF49, 2012 QB17, 2012 JS11, 2012 HJ1, 2009 SB15, 2007 TR65, 2007 RT19, 2006 WN1, 2005 UC, 2005 JU1, 2004 TL19, 2002 UA31, 2002 RC118, 2001 SG262, 1998 SE36, 99907, 88263, 68548, 330825, 329669, 326732, 303262, 276397, 265962, 237442, 192642, 17182, 163899, 162911, 162900, 162011, 155340, 155334, 153306, 144411, 136993, 12538, 11054, 5731, 5646, 5587, 5143, 4660, 4487, 3908, 3838, 3360, 3200, 1620
C01Lohrmann Obs. in Germany, 3 in MPEC 2012-U28 -- 52387, 163732, 105140
C41MASTER-II Obs. Kislovodsk in Russia, 1 in MPEC 2012-U28 -- 5646
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2012-U26, 2012-U31, 2012-U38 & 2012-U42 -- 2012 US9, 2012 TP274, C/2012 T5, 2002 UZ30
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPEC 2012-U28 -- 2012 TY52, 2012 TS78, 2012 TO139
932McCarthy Obs. in Connecticut, 1 in MPEC 2012-U28 -- 2012 TT231
G84Mt. Lemmon SkyCenter in Arizona, 1 in MPEC 2012-U40 -- P/2012 T7
G96Mt. Lemmon Survey (MLS) in Arizona, 24 in MPECs 2012-U26, 2012-U28, 2012-U30, 2012-U31, 2012-U34, 2012-U35, 2012-U36, 2012-U37, 2012-U38, 2012-U39, 2012-U40, 2012-U41 & 2012-U42 -- 2012 UY9, 2012 UX9, 2012 UW9, 2012 UV9, 2012 US9, 2012 TQ256, 2012 TP274, 2012 TL20, P/2012 TK8, 2012 TJ79, 2012 TB259, P/2012 T7, C/2012 T6, C/2012 T5, 2012 QX17, 2012 QQ10, 2007 TR65, 2003 FT3, 2002 XG4, 2002 UZ30, 34613, 237442, 155340, 154555
0892Oleksandr V. Shulga via Nikolaev Obs. in the Ukraine, 21 in MPEC 2012-U28 -- 2012 TG53, 2012 TC4, 2012 RV16, 2012 QF49, 2012 QE50, 2012 QB17, 2012 JS11, 2005 ST1, 2005 JU1, 2005 GQ21, 2002 UA31, 2002 TY68, 334412, 330825, 329520, 276397, 214869, 162911, 143649, 136993, 4179
583Odessa-Mayaki Obs. in the Ukraine, 3 in MPEC 2012-U28 -- 2012 QE50, 136993, 4179
C23Olmen Obs. in Belgium, 1 in MPEC 2012-U38 -- C/2012 T5
J43Oukaimeden Obs. in Morocco, 3 in MPEC 2012-U28 -- 2004 TL19, 96536, 277127
F51Pan-STARRS 1 (PS1) in Hawaii, 16 in MPECs 2012-U26, 2012-U28 & 2012-U41 -- 2012 TL20, P/2012 TK8, 2012 QQ10, 2012 LE11, 2008 XE2, 2008 EZ97, 2003 FT3, 2002 UZ30, 330825, 329275, 17188, 153306, 141052, 5731, 5646, 3288
A53Peschiera del Garda Obs. in Italy, 4 in MPEC 2012-U28 -- 2012 RV16, 2012 QF49, 2012 QB17, 2012 JS11
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPEC 2012-U28 -- 2012 TP139, 2012 TG53, 2012 QF49, 2012 LE11, 2012 JS11, 2005 JU1, 214869
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-U38 -- C/2012 T5
H06*Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-U38 -- C/2012 T5
H06`Erik Bryssinck in Belgium via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-U40 -- P/2012 T7
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 3 in MPECs 2012-U38, 2012-U39 & 2012-U40 -- P/2012 T7, C/2012 T6, C/2012 T5
461SZTE Asteroid Program in Hungary, 1 in MPEC 2012-U28 -- 2012 TC4
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2012-U36 -- 2012 UX9
H36Sandlot Obs. in Kansas, 3 in MPECs 2012-U31, 2012-U38 & 2012-U42 -- 2012 US9, 2012 TP274, C/2012 T5
204Schiaparelli Obs. in Italy, 3 in MPECs 2012-U38, 2012-U40 & 2012-U42 -- 2012 TP274, P/2012 T7, C/2012 T5
E12Siding Spring Survey (SSS) in New South Wales, 6 in MPECs 2012-U27, 2012-U29, 2012-U30, 2012-U32, 2012-U33 & 2012-U34 -- 2012 UV9, 2012 UU9, 2012 UT9, 2012 TT256, 2012 TB259, 2012 TA259
510Siegen Obs. in Germany, 1 in MPEC 2012-U28 -- 136993
G68Sierra Stars Obs. in northern California, 1 in MPEC 2012-U40 -- P/2012 T7
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2012-U28 & 2012-U38 -- C/2012 T5, 3288
291Spacewatch 1.8m telescope in Arizona, 19 in MPECs 2012-U26, 2012-U28, 2012-U31, 2012-U36 & 2012-U38 -- 2012 UX9, 2012 US9, 2012 TY52, 2012 TT, 2012 TS78, 2012 TP139, 2012 TN20, 2012 TK79, 2012 TJ146, 2012 TH53, 2012 TF53, C/2012 T5, 2012 SY20, 2012 SV20, 2012 SR56, 2012 SC22, 2012 RH3, 2002 UZ30, 3753
926Tenagra II Obs. in Arizona, 3 in MPECs 2012-U28 & 2012-U41 -- P/2012 TK8, 2008 XE2, 8034
A48Verona Obs. in Italy, 2 in MPEC 2012-U28 -- 2012 RV16, 2012 QB17
G56Walnut Creek Obs. in northern California, 1 in MPEC 2012-U28 -- 2012 TZ52
I42Westport Obs. in Massachusetts, 3 in MPEC 2012-U28 -- 2012 QY14, 2012 QB17, 333889
718Wiggins Obs. in Utah, 2 in MPEC 2012-U28 -- 2012 TG53, 2012 SA59
I15Wishing Star Obs. in Rhode Island, 7 in MPEC 2012-U28 -- 2012 SA59, 2012 RV16, 2012 QY14, 2012 QB17, 219071, 141851, 137032
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 18 October '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2341 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 JPL NEO Program 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
2012 UY9JPL Sentry19402022-21121411.8e-05-4.54-4.850JPL: "Analysis based on 11 observations spanning .98492 days (2012-Oct-17.27145 to 2012-Oct-18.25637)." Diameter approximately 0.045 km. from mean, weighted H=24.4.
2012 UENEODyS16002051-205859.59e-07-7.53-7.580NEODyS: "Based on 18 optical observations (of which 1 are rejected as outliers) from 2012-10-16.254 to 2012-10-17.286."
2012 TO139JPL Sentry16002034-208631.4e-08-4.67-4.690JPL: "Analysis based on 40 observations spanning 6.1835 days (2012-Oct-11.25361 to 2012-Oct-17.437066)." Diameter approximately 0.360 km. from mean, weighted H=19.9.
NEODyS16002086-208615.16e-11-7.48-7.480NEODyS: "Based on 40 optical observations (of which 0 are rejected as outliers) from 2012-10-11.254 to 2012-10-17.438."
2012 TS78JPL Sentry16002026-209853.0e-08-3.66-3.700JPL: "Analysis based on 46 observations spanning 9.1769 days (2012-Oct-08.20071 to 2012-Oct-17.3776)." Diameter approximately 0.700 km. from mean, weighted H=18.4.
NEODyS1600R E M O V E D-
2012 TP20JPL Sentry16002069-209835.5e-07-7.86-8.100JPL: "Analysis based on 23 observations spanning 8.0991 days (2012-Oct-08.19843 to 2012-Oct-16.297488)." Diameter approximately 0.009 km. from mean, weighted H=27.8.
NEODyS16002064-207925.23e-07-7.86-8.070NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2012-10-08.199 to 2012-10-16.298."
2012 TC4JPL Sentry16002020-2112592.3e-05-5.45-6.350JPL: "Analysis based on 301 observations spanning 7.2807 days (2012-Oct-04.467673 to 2012-Oct-11.74842)." Diameter approximately 0.015 km. from mean, weighted H=26.7.
NEODyS16002020-2098273.72e-06-6.25-7.020NEODyS: "Based on 301 optical observations (of which 2 are rejected as outliers) from 2012-10-04.468 to 2012-10-11.749."

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

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 18 October '12

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

2322Grabbed MPEC 2012-U42 - 2012 TP274 - see above
2144Noted Radar Astrometry database update - see above
2143Grabbed MPEC 2012-U41 - Comet P/2012 TK8 (Tenagra) - see above
1940Noted that JPL Sentry has posted 2012 UY9 as an impact risk - see above
Grabbed MPEC 2012-U38 - Comet C/2012 T5 (Bressi) - see above
Grabbed MPEC 2012-U39 - Comet C/2012 T6 (Kowalski) - see above
Grabbed MPEC 2012-U40 - Comet P/2012 T7 (Vorobjov) - see above
1928Updated Traffic Report
1707Grabbed MPEC 2012-U30 - 2012 TB259 - see above
Grabbed MPEC 2012-U31 - 2012 US9 - see above
Grabbed MPEC 2012-U32 - 2012 UT9 - see above
Grabbed MPEC 2012-U33 - 2012 UU9 - see above
Grabbed MPEC 2012-U34 - 2012 UV9 - see above
Grabbed MPEC 2012-U35 - 2012 UW9 - see above
Grabbed MPEC 2012-U36 - 2012 UX9 - see above
Grabbed MPEC 2012-U37 - 2012 UY9 - see above
1600Noted that JPL Sentry has updated its 2012 TC4 risk assessment - see above
Noted that NEODyS has updated its 2012 TC4 risk assessment - see above
Noted that JPL Sentry has updated its 2012 TO139 risk assessment - see above
Noted that NEODyS has updated its 2012 TO139 risk assessment - see above
Noted that JPL Sentry has updated its 2012 TP20 risk assessment - see above
Noted that NEODyS has reposted 2012 TP20 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 TS78 risk assessment - see above
Noted that NEODyS has removed 2012 TS78 as an impact risk - see above
Noted that NEODyS has posted 2012 UE as an impact risk - see above
Grabbed MPEC 2012-U28 - Daily Orbit Update - see above
Grabbed MPEC 2012-U29 - 2012 TA259 - see above
0146Grabbed MPEC 2012-U26 - 2002 UZ30 - see above
Grabbed MPEC 2012-U27 - 2012 TT256 - see above