2009-10-23 Tracking News

Contents on 23 October '09

IAU Minor Planet Center
- NEOCP Activity -- seven listings: 1 new, 6 updated
- New MPECs -- five MPECs
Observers -- 23 observing facilities
Impact Risk Monitoring -- four objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Earth's Busy Neighborhood Traffic Report
Ephemerides for risk-rated and nearby objects
News image catalog
Old & new CRT Archive
Old News Archive & Small Objects Archive

The latest A/CC news is available via framed access, 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.

NEOCP Activity on 23 October '09

The MPC's NEO Confirmation Page has 7 listings: 1 new, 6 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and six updated listings. Of these, five were "one nighters." So far The Tracking News has counted a total of thirteen listings on the NEOCP at some point 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 '09

Minor Planet Electronic Circulars

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

MPEC 2009-U68 time-stamped "02:52 UT" - 2009 HW77 - see below
MPEC 2009-U69 time-stamped "06:12 UT" - Daily Orbit Update - see below
MPEC 2009-U70 time-stamped "16:56 UT" - 2009 UX17 - see below
MPEC 2009-U71 time-stamped "17:05 UT" - 2009 UY17 - see below
MPEC 2009-U72 time-stamped "17:13 UT" - 2009 UZ17

MPEC 2009-U72 - "17:13 UT" - 2009 UZ17

K09U17Z 2009 UZ17 was discovered at 1420 UT on 22 Oct. by the Siding Spring Survey (SSS), which observed it at Oct. 22.60-62p4, 22.66-67p3, 22.76p1, and 23.46p2. The discovery was confirmed by Grove Creek Obs. (Oct. 22.71-74p4) and Faulkes Telescope South (Oct. 23.65-66p6).

MPEC 2009-U71 - "17:05 UT" - 2009 UY17

K09U17Y 2009 UY17 was discovered at 1341 UT on 22 Oct. by SSS, which observed it at Oct. 22.57p2, 22.62p2, and 23.40-41p2. The discovery was confirmed by Faulkes South (Oct. 23.65p4).

MPEC 2009-U70 - "16:56 UT" - 2009 UX17

K09U17X 2009 UX17 was discovered at 0838 UT on 22 Oct. by the Catalina Sky Survey (CSS), which observed it at Oct. 22.36-44p7. The discovery was confirmed by Tzec Maun Obs. Mayhill (Oct. 22.48-49p3), Remanzacco Obs. (Oct. 22.96p2), Great Shefford Obs. (Oct. 23.04-05p3), Sabino Canyon Obs. (Oct. 23.32-33p3), the Mt. Lemmon Survey (MLS) (Oct. 23.34-36p4), Tenagra II Obs. (Oct. 23.35p3), the Spacewatch 1.8m telescope (Oct. 23.40-41p3), and Richard Miles via Faulkes Telescope North (Oct. 23.46p5).

<< DOU on 23 Oct. '09 >> MPEC 2009-U69 - "06:12 UT" - Daily Orbit Update

Observations of risk-listed objects
K09U14K 2009 UK14 (small asteroid, arc=1 day, H=25.8 ~23m) from Miles/Faulkes North (Oct. 22.57p1), Great Shefford Obs. (Oct. 23.12p2), and Spacewatch 1.8m (Oct. 23.15-16p3)
K09U03N 2009 UN3 (i=37.4°, arc=3 days, H=17.7 ~977m) from SSS (Oct. 22.59p1)
K09U02F 2009 UF2 (small asteroid, Q=4.731 AU, arc=5 days, H=24.3 ~47m) from Spacewatch 1.8m (Oct. 22.23-24p3 at V=22.8 & 23.14-15p3)
K09T00U 2009 TU (small asteroid, arc=8 days, H=27.3 ~12m) from David Tholen's team on Mauna Kea (Oct. 18.46p2 at R=22.2)
Observations of recently (no longer) risk-listed objects
K09U02D 2009 UD2 (small asteroid, arc=4 days, H=22.2 ~123m) from Spacewatch 1.8m (Oct. 22.25-26p3)
K09U00E 2009 UE (small asteroid, arc=6 days, H=25.2 ~31m) from Tenagra II Obs. (Oct. 22.51p2)
K09U00D 2009 UD (small asteroid, arc=6 days, H=27.2 ~12m) from Schiaparelli Obs. (Oct. 16.95-96p5)
K09T10G 2009 TG10 (i=41.7°, arc=7 days, H=17.3 ~1.17 km) from Tenagra II Obs. (Oct. 22.35-36p3)
K09T08O 2009 TO8 (small asteroid, arc=7 days, H=26.1 ~20m) from Tenagra II Obs. (Oct. 22.44p2)
K09T03B 2009 TB3 (arc=10 days, H=21.0 ~214m) from Spacewatch 1.8m (Oct. 22.41-43p3)
Observations of small asteroids (H>22.0)
K09U05R 2009 UR5 (arc=1 day, H=25.6 ~26m) from Tenagra II Obs. (Oct. 22.42-43p3)
K09U05J 2009 UJ5 (arc=2 days, H=25.3 ~29m) from Spacewatch 1.8m (Oct. 22.41-43p3) and Tenagra II Obs. (Oct. 22.43-44p3)
K09U01U 2009 UU1 (arc=5 days, H=24.8 ~37m) from Great Shefford Obs. (Oct. 22.90p3)
K09U01O 2009 UO1 (arc=5 days, H=24.4 ~45m) from MLS (Oct. 22.41-44p4)
K09U01N 2009 UN1 (arc=5 days, H=25.3 ~29m) from Tenagra II Obs. (Oct. 22.41-42p3)
K09U00J 2009 UJ (Q=4.241 AU, arc=7 days, H=26.1 ~20m) from Schiaparelli Obs. (Oct. 17.95-96p3) and Great Shefford Obs. (Oct. 23.07-08p3)
K09U00F 2009 UF (arc=2 days, H=22.6 ~102m) from Schiaparelli Obs. (Oct. 16.86-87p2)
K09T08N 2009 TN8 (arc=6 days, H=24.2 ~49m) from Schiaparelli Obs. (Oct. 16.82-84p3)
K09T08L 2009 TL8 (arc=8 days, H=22.1 ~129m) from Guidestar Obs. (Oct. 22.76-78p3)
K09T00K 2009 TK (arc=14 days, H=22.1 ~129m) from SSS (Oct. 22.57p2)
Observations of almost-small asteroids (21.7<H<=22.0)
K09U00Q 2009 UQ (arc=3 days, H=21.8 ~148m) from Schiaparelli Obs. (Oct. 17.83-84p3)
Observations of other objects
K09U03M 2009 UM3 (Q=4.280 AU, arc=3 days, H=17.7 ~977m) from LINEAR (Oct. 22.39-45p4)
K09U02E 2009 UE2 (arc=5 days, H=19.6 ~407m) from Spacewatch 1.8m (Oct. 23.12p3)
K09U00N 2009 UN (Q=4.645 AU, arc=6 days, H=21.3 ~186m) from Spacewatch 1.8m (Oct. 22.52-53p3)
K09U00M 2009 UM (arc=6 days, H=20.6 ~257m) from Spacewatch 1.8m (Oct. 22.50-51p3)
K09T12K 2009 TK12 (arc=7 days, H=20.3 ~295m) from Schiaparelli Obs. (Oct. 17.97-98p2 & 18.06p1) and Konigsleiten Obs. (Oct. 19.00-01p3)
K09T08K 2009 TK8 (arc=6 days, H=20.1 ~323m) from Schiaparelli Obs. (Oct. 17.07-08p5)
K09T04L 2009 TL4 (arc=8 days, H=21.6 ~162m) from CSS (Oct. 22.25-27p4)
K09T01A 2009 TA1 (arc=21 days, H=20.1 ~323m) from program code 1 via the Liverpool Telescope (Oct. 15.92p4)
K09SH2Q 2009 SQ172 (arc=24 days, H=18.3 ~741m) from SSS (Oct. 22.58p2)
K09S19U 2009 SU19 (q=0.209 AU, arc=34 days, H=17.9 ~891m) from Spacewatch 1.8m (Oct. 22.08-09p3)
K09R01D 2009 RD1 (arc=41 days, H=20.5 ~269m) from CSS (Oct. 22.25-27p4)
K09K03C 2009 KC3 (Q=5.447 AU, arc=170 days, H=18.0 ~851m) from Cyclops Obs. (Oct. 14.80-81p3 & 14.85-86p3)
K09H21D 2009 HD21 (Q=4.673 AU, arc=2 opp, H=18.3 ~741m) from SSS (Oct. 22.40p2)
K02R25Q 2002 RQ25 (arc=4 opp, H=20.4 ~282m) from MLS (Oct. 22.19-21p4)
J99T05E 1999 TE5 (arc=2 opp, H=20.5 ~269m) from MLS (Oct. 22.12-23p15) and SSS (Oct. 22.45p1)
L8017 218017 2001 XV266 from LINEAR (Oct. 22.33-38p5)
L2546 212546 2006 SV19 from SSS (Oct. 22.53-56p4)
G4121 164121 2003 YT1 from Goodricke-Pigott Obs. (Oct. 21.48-49p2)
G2998 162998 2001 SK162 from Konigsleiten Obs. (Oct. 19.94-95p6)
G2168 162168 1999 GT6 from MLS (Oct. 22.41-44p4)
F9402 159402 1999 AP10 from Eridanus Obs. (Oct. 20.86-87p3)
F5334 155334 2006 DZ169 from SSS (Oct. 22.43p1)
D8877 138877 2000 XG47 from MLS (Oct. 22.32-35p4)
D6617 136617 1994 CC from Konigsleiten Obs. (Oct. 19.97-98p6)
54660 54660 2000 UJ1 from Guidestar Obs. (Oct. 22.83-85p3)
35396 35396 1997 XF11 from LINEAR (Oct. 22.40-45p5)
05626 5626 1991 FE from MLS (Oct. 22.10-12p4)
03552 3552 Don Quixote (1983 SA) from SSS (Oct. 22.47-50p4)
03361 3361 Orpheus (1982 HR) from Konigsleiten Obs. (Oct. 20.02-03p6) and LINEAR (Oct. 22.21-26p5)
03200 3200 Phaethon (1983 TB) from Cyclops Obs. (Oct. 14.87-91p6)
02100 2100 Ra-Shalom (1978 RA) from SSS (Oct. 22.41-44p3)
01863 1863 Antinous (1948 EA) from SSS (Oct. 22.48-50p2)

MPEC 2009-U68 - "02:52 UT" - 2009 HW77

K09H77W 2009 HW77 from MLS (2008 March 10.43-46p4 & May 25.25-28p4), the Spacewatch 0.9m telescope (2008 March 27.25-28p3, 2008 April 1.25-28p3 & 2008 April 4.24-29p3), and Baldone Obs. (May 1.91-94p2)

Observers on 23 October '09

A total of 23 observing facilities appear in today's MPECs.

Code	Observer / observatory
`069`	Baldone Obs. in Latvia, 1 in MPEC 2009-U68 -- 2009 HW77
`703`	Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2009-U69 & 2009-U70 -- 2009 UX17, 2009 TL4, 2009 RD1
`B84`	Cyclops Obs. in The Netherlands, 2 in MPEC 2009-U69 -- 2009 KC3, 3200
`A27`	Eridanus Obs. in Germany, 1 in MPEC 2009-U69 -- 159402
`F656`	Richard Miles in England via Faulkes Telescope North in Hawaii, 2 in MPECs 2009-U69 & 2009-U70 -- 2009 UX17, 2009 UK14
`E10`	Faulkes Telescope South in New South Wales, 2 in MPECs 2009-U71 & 2009-U72 -- 2009 UZ17, 2009 UY17
`683`	Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2009-U69 -- 164121
`J95`	Great Shefford Obs. in England, 4 in MPECs 2009-U69 & 2009-U70 -- 2009 UX17, 2009 UU1, 2009 UK14, 2009 UJ
`E16`	Grove Creek Obs. in New South Wales, 1 in MPEC 2009-U72 -- 2009 UZ17
`A17`	Guidestar Obs. in Germany, 2 in MPEC 2009-U69 -- 2009 TL8, 54660
`C05`	Konigsleiten Obs. in Austria, 4 in MPEC 2009-U69 -- 2009 TK12, 162998, 136617, 3361
`704`	LINEAR in New Mexico, 4 in MPEC 2009-U69 -- 2009 UM3, 35396, 218017, 3361
`J131`	program code 1 via the Liverpool Telescope in the Canary Islands, 1 in MPEC 2009-U69 -- 2009 TA1
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2009-U69 -- 2009 TU
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2009-U68, 2009-U69 & 2009-U70 -- 2009 UX17, 2009 UO1, 2009 HW77, 2002 RQ25, 1999 TE5, 162168, 138877, 5626
`473`	Remanzacco Obs. in Italy, 1 in MPEC 2009-U70 -- 2009 UX17
`854`	Sabino Canyon Obs. in Arizona, 1 in MPEC 2009-U70 -- 2009 UX17
`204`	Schiaparelli Obs. in Italy, 7 in MPEC 2009-U69 -- 2009 UQ, 2009 UJ, 2009 UF, 2009 UD, 2009 TN8, 2009 TK8, 2009 TK12
`E12`	Siding Spring Survey (SSS) in New South Wales, 12 in MPECs 2009-U69, 2009-U71 & 2009-U72 -- 2009 UZ17, 2009 UY17, 2009 UN3, 2009 TK, 2009 SQ172, 2009 HD21, 1999 TE5, 212546, 155334, 3552, 2100, 1863
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2009-U68 -- 2009 HW77
`291`	Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2009-U69 & 2009-U70 -- 2009 UX17, 2009 UN, 2009 UM, 2009 UK14, 2009 UJ5, 2009 UF2, 2009 UE2, 2009 UD2, 2009 TB3, 2009 SU19
`926`	Tenagra II Obs. in Arizona, 7 in MPECs 2009-U69 & 2009-U70 -- 2009 UX17, 2009 UR5, 2009 UN1, 2009 UJ5, 2009 UE, 2009 TO8, 2009 TG10
`H10`	Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2009-U70 -- 2009 UX17

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 23 October '09

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL 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. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) 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

2009 UK14	JPL Sentry	1315	R E M O V E D						JPL: Risk listing removed at 1031 UTC.

2009 UN3	JPL Sentry	1315	2026-2108	71	1.1e-07	-3.19	-4.06	0	JPL: "Analysis based on 14 observations spanning 2.9909 days (2009-Oct-19.59856 to 2009-Oct-22.58941)." Diameter approximately 0.919 km. from mean, weighted H=17.8.
2009 UN3	NEODyS	1315	2013-2090	149	2.94e-07	-2.54	-2.99	0	NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2009/10/19.599 to 2009/10/22.590."

2009 UF2	JPL Sentry	1315	R E M O V E D						JPL: Risk listing removed at 1029 UTC.
2009 UF2	NEODyS	1315	R E M O V E D						-

2009 TU	JPL Sentry	1315	2086-2095	5	2.2e-05	-5.87	-6.32	0	JPL: "Analysis based on 57 observations spanning 8.2739 days (2009-Oct-10.18978 to 2009-Oct-18.463635)." Diameter approximately 0.011 km. from mean, weighted H=27.4.
2009 TU	NEODyS	1315	2086	3	2.15e-05	-5.88	-6.32	0	NEODyS: "Based on 58 optical observations (of which 1 are rejected as outliers) from 2009/10/10.191 to 2009/10/18.464."

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 23 October '09

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

1802	Grabbed MPEC 2009-U72 - 2009 UZ17 - see above
1712	Grabbed MPEC 2009-U70 - 2009 UX17 - see above Grabbed MPEC 2009-U71 - 2009 UY17 - see above
1315	Noted that JPL Sentry has updated its 2009 TU risk assessment - see above Noted that NEODyS has updated its 2009 TU risk assessment - see above Noted that JPL Sentry has removed 2009 UF2 as an impact risk - see above Noted that NEODyS has removed 2009 UF2 as an impact risk - see above Noted that JPL Sentry has removed 2009 UK14 as an impact risk - see above Noted that JPL Sentry has updated its 2009 UN3 risk assessment - see above Noted that NEODyS has updated its 2009 UN3 risk assessment - see above Grabbed MPEC 2009-U69 - Daily Orbit Update - see above
0407	Grabbed MPEC 2009-U68 - 2009 HW77 - see above

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