2010-10-29 Tracking News

Contents on 29 October '10

IAU Minor Planet Center
- NEOCP Activity -- nine listings: 2 new, 7 updated
- New MPECs -- nine MPECs
Observers -- 38 observing facilities
Impact Risk Monitoring -- seven objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Of 351 risk-listed objects, 41 have had news in the last 31 days. Updated at 1711 UTC on 29 Oct.
Earth's Busy Neighborhood Traffic Report
Four objects are known to be within ten LD of Earth today. Updated at 2042 UTC on 29 Oct.
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 29 October '10

The MPC's NEO Confirmation Page has 9 listings: 2 new, 7 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and seven updated listings. Of these, one was a "one nighter." So far The Tracking News has counted a total of eighteen 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 29 October '10

Minor Planet Electronic Circulars

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

MPEC 2010-U49 time-stamped "02:10 UT" - Comet P/2010 U2 (Hill) - see below
MPEC 2010-U50 time-stamped "06:10 UT" - Daily Orbit Update - see below
MPEC 2010-U51 time-stamped "13:50 UT" - 2010 UE7 - see below
MPEC 2010-U52 time-stamped "14:04 UT" - 2010 UF7 - see below
MPEC 2010-U53 time-stamped "15:36 UT" - Comet C/2010 R1 (LINEAR) - see below
MPEC 2010-U54 time-stamped "16:46 UT" - Comet P/2010 R2 (La Sagra) - see below
MPEC 2010-U55 time-stamped "17:21 UT" - Comet C/2010 S1 (LINEAR) - see below
MPEC 2010-U56 time-stamped "20:07 UT" - 2010 UG7 - see below
MPEC 2010-U57 time-stamped "20:54 UT" - 2010 UH7

MPEC 2010-U57 - "20:54 UT" - 2010 UH7

K10U07H 2010 UH7 (Q=4.917 AU, H=18.9 ~562m) from the Catalina Sky Survey (CSS) (Oct. 28.08-09p4), the Mt. Lemmon Survey (MLS) (Oct. 28.15p4), Astronomical Research Obs. Westfield (Oct. 28.17-18p2), the Spacewatch 1.8m telescope (Oct. 28.19p2 & 29.10-11p3), Sabino Canyon Obs. (Oct. 28.23-24p2), Schiaparelli Obs. (Oct. 28.83-84p3), Sandlot Obs. (Oct. 29.07p2), and Gaisberg Obs. (Oct. 29.80-81p3)

MPEC 2010-U56 - "20:07 UT" - 2010 UG7

K10U07G 2010 UG7 (Q=4.100 AU, Earth MOID=8.8 LD, H=21.4 ~178m) from MLS (Oct. 28.15-21p11), Sabino Canyon Obs. (Oct. 28.21-22p2), Schiaparelli Obs. (Oct. 28.78-79p2), Sandlot Obs. (Oct. 29.04-05p2), ARO Westfield (Oct. 29.16-17p3), and Gaisberg Obs. (Oct. 29.79p3)

MPEC 2010-U55 - "17:21 UT" - Comet C/2010 S1 (LINEAR)

CK10S010 C/2010 S1 (LINEAR) (i=125.3°, q=5.906 AU, TP=2013 May 19.9579 TT) from Remanzacco Obs. (Oct. 5.13-14p2), Kiev Comet Station (Oct. 13.94-95p3 & 28.90-93p7), Malaga Obs. (Oct. 24.90p3), ISON-NM Obs. (Oct. 26.42-45p3), and CAST Obs. (Oct. 28.81-82p2)

MPEC 2010-U54 - "16:46 UT" - Comet P/2010 R2 (La Sagra)

PK10R020 P/2010 R2 (La Sagra) (q=2.623 AU, TP=2010 June 25.70982 TT) from Kiev Comet Station (Oct. 13.84-85p8 & 28.84-86p6), Castelmartini Obs. (Oct. 20.86-87p3 & 22.87-88p3), Montcabre Obs. (Oct. 24.83-88p3), Nazaret Obs. (Oct. 25.89-90p3, 26.85-86p3 & 27.89-90p3), and CAST Obs. (Oct. 28.80p2)

MPEC 2010-U53 - "15:36 UT" - Comet C/2010 R1 (LINEAR)

CK10R010 C/2010 R1 (LINEAR) (i=156.9°, q=5.638 AU, TP=2012 May 18.123 TT) from Kiev Comet Station (Oct. 13.73-74p2) and Castelmartini Obs. (Oct. 20.75p1)

MPEC 2010-U52 - "14:04 UT" - 2010 UF7

K10U07F 2010 UF7 (H=19.2 ~490m) from MLS (Oct. 19.23-25p4, 28.29-31p4 & 29.24p4), Schiaparelli Obs. (Oct. 28.96-98p2), Remanzacco Obs. (Oct. 28.99p2), ARO Westfield (Oct. 29.24-25p2), and Sandlot Obs. (Oct. 29.25-27p3)

MPEC 2010-U51 - "13:50 UT" - 2010 UE7

K10U07E 2010 UE7 (H=19.1 ~513m) from the Siding Spring Survey (SSS) (Oct. 27.66-70p4, 28.52-53p2 & 29.51-53p2), Schiaparelli Obs. (Oct. 28.15-16p2), Sabino Canyon Obs. (Oct. 28.29-30p3), Ernesto Guido via RAS Obs. Mayhill (Oct. 28.30-31p2), Sandlot Obs. (Oct. 28.40-42p3), Los Molinos Obs. (Oct. 29.14-15p16), and ARO Westfield (Oct. 29.38-39p3)

<< DOU on 29 Oct. '10 >> MPEC 2010-U50 - "06:10 UT" - Daily Orbit Update

Observations of risk-listed objects
K10U06X 2010 UX6 (small asteroid, Q=4.074 AU, arc=1 day, H=23.0 ~85m) from LINEAR (Oct. 28.20-25p5)
K10TE9U 2010 TU149 (q=0.379 AU, Q=4.029 AU, arc=16 days, H=20.6 ~257m) from Schiaparelli Obs. (Oct. 28.17p5 & 29.18-19p3)
K10T54W 2010 TW54 (small asteroid, arc=5 days, H=27.6 ~10m) from ESA Optical Ground Station (ESA OGS) (Oct. 16.19-21p3)
Observations of recently (no longer) risk-listed objects
K10T19G 2010 TG19 (small asteroid, arc=15 days, H=23.9 ~56m) from Peschiera del Garda Obs. (Oct. 21.79-80p7)
K10S16Z 2010 SZ16 (i=42.3°, Q=4.298 AU, arc=26 days, H=20.2 ~309m) from David Tholen's team on Mauna Kea (Oct. 22.65p1)
F3814 153814 2001 WN5 from Castelmartini Obs. (Oct. 21.85p3)
Observations of small asteroids (H>22.0)
K10U00P 2010 UP (arc=9 days, H=24.6 ~41m) from LINEAR (Oct. 28.40-45p4)
K10U00O 2010 UO (arc=8 days, H=26.3 ~19m) from ARO Westfield (Oct. 27.31-33p3)
K10T54R 2010 TR54 (arc=18 days, H=24.5 ~43m) from Spacewatch 1.8m (Oct. 28.38-39p3)
K10S15K 2010 SK15 (arc=29 days, H=22.8 ~93m) from ARO Westfield (Oct. 28.25-26p3)
K10R03S 2010 RS3 (arc=56 days, H=22.6 ~102m) from Spacewatch 1.8m (Oct. 28.33-34p3 at V=22.0-22.3)
Observations of almost-small asteroids (21.7<H<=22.0)
K10U07B 2010 UB7 (arc=1 day, H=21.9 ~141m) from Schiaparelli Obs. (Oct. 28.92-93p2)
K10U00M 2010 UM (arc=10 days, H=22.0 ~135m) from ARO Westfield (Oct. 27.34-36p3)
Observations of other objects
K10U00D 2010 UD (arc=12 days, H=21.1 ~204m) from ARO Westfield (Oct. 27.12-13p4 & 28.20-21p4), Madonna di Dossobuono Obs. (Oct. 27.85-86p4), and Verona Obs. (Oct. 28.88-89p4)
K10TG8X 2010 TX168 (arc=18 days, H=19.8 ~371m) from Castelmartini Obs. (Oct. 21.92p3), CSS (Oct. 28.25-28p4), and Peschiera del Garda Obs. (Oct. 28.94-96p4)
K10TG7J 2010 TJ167 (arc=14 days, H=21.1 ~204m) from Spacewatch 1.8m (Oct. 28.27-28p2)
K10TE9V 2010 TV149 (arc=14 days, H=18.5 ~676m) from LINEAR (Oct. 27.27-31p4 & 28.27-31p4) and ARO Westfield (Oct. 28.22-24p5)
K10T55C 2010 TC55 (Q=4.596 AU, arc=16 days, H=20.1 ~323m) from MPC code C34 (Oct. 27.93-99p4), CSS (Oct. 28.17-18p3), and ARO Westfield (Oct. 28.22-23p7)
K10T54Z 2010 TZ54 (arc=16 days, H=19.1 ~513m) from ARO Westfield (Oct. 27.24-27p3)
K10T54Y 2010 TY54 (arc=17 days, H=21.5 ~170m) from ARO Westfield (Oct. 28.27-28p3)
K10T54N 2010 TN54 (arc=2 opp, H=19.1 ~513m) from ARO Westfield (Oct. 27.26-27p3)
K10T54F 2010 TF54 (Q=5.517 AU, arc=20 days, H=19.7 ~389m) from ARO Westfield (Oct. 27.10-12p4) and Verona Obs. (Oct. 28.86-87p4)
K10T47C 2010 TC47 (arc=21 days, H=20.4 ~282m) from CSS (Oct. 28.17-19p4) and Desert Moon Obs. (Oct. 28.32-33p3)
K10T07J 2010 TJ7 (arc=23 days, H=19.7 ~389m) from Peschiera del Garda Obs. (Oct. 28.87-90p4) and Atlante Obs. (Oct. 28.90-92p3)
K10S13L 2010 SL13 (arc=39 days, H=19.3 ~467m) from ARO Westfield (Oct. 27.14-16p3 & 28.07-09p3)
K10S13D 2010 SD13 (Q=4.299 AU, arc=31 days, H=18.8 ~589m) from ARO Westfield (Oct. 28.07-08p3)
K10RE7A 2010 RA147 (arc=44 days, H=19.4 ~446m) from La Sagra Obs. (Oct. 27.77-79p3) and CSS (Oct. 28.14-16p4)
K10P10M 2010 PM10 (arc=83 days, H=19.7 ~389m) from Castelmartini Obs. (Oct. 21.87-88p3), La Sagra Obs. (Oct. 27.94-97p3), and ARO Westfield (Oct. 28.24-26p4)
K10M01F 2010 MF1 (arc=132 days, H=19.7 ~389m) from Spacewatch 1.8m (Oct. 28.36-37p3)
K10L63Y 2010 LY63 (arc=4 opp, H=17.9 ~891m) from Castelmartini Obs. (Oct. 21.85-86p3)
K10J88G 2010 JG88 (arc=167 days, H=19.4 ~446m) from Spacewatch 1.8m (Oct. 28.44-45p3)
K10H80Q 2010 HQ80 (arc=2 opp, H=20.0 ~339m) from Spacewatch 1.8m (Oct. 28.25-26p3)
K10F92O 2010 FO92 (arc=222 days, H=20.0 ~339m) from Spacewatch 1.8m (Oct. 28.20-21p3)
K07VI9G 2007 VG189 (arc=2 opp, H=19.5 ~426m) from Castelmartini Obs. (Oct. 21.86p3)
K07R17U 2007 RU17 (q=0.351 AU, arc=2 opp, H=18.1 ~812m) from Peschiera del Garda Obs. (Oct. 28.81-83p7) and Atlante Obs. (Oct. 28.86-87p3)
K04V60T 2004 VT60 (i=43.5°, arc=4 opp, H=17.6 ~1.02 km) from CSS (Oct. 28.41-43p4)
K04F04U 2004 FU4 (arc=3 opp, H=18.5 ~676m) from CSS (Oct. 28.47-49p4)
K03U11V 2003 UV11 (q=0.344 AU, arc=4 opp, H=19.4 ~446m) from Castelmartini Obs. (Oct. 21.93p3), North Obs. (Oct. 27.86-88p10), CSS (Oct. 28.19-22p4), Guido/RAS Mayhill (Oct. 28.32-33p4), and Betelgeuse Station (Oct. 28.88p12)
K03T07X 2003 TX7 (i=38.7°, arc=4 opp, H=19.3 ~467m) from CSS (Oct. 28.23-25p4)
K03H32Q 2003 HQ32 (arc=6 opp, H=17.9 ~891m) from CSS (Oct. 28.19-22p4)
K02G09M 2002 GM9 (arc=5 opp, H=18.6 ~645m) from the Spacewatch 0.9m telescope (Oct. 28.26-30p3)
K01W01T 2001 WT1 (arc=5 opp, H=20.0 ~339m) from CSS (Oct. 28.29-31p4)
O9595 249595 1997 GH28 from CSS (Oct. 28.13-16p4)
L6115 216115 2006 SU19 from CSS (Oct. 28.35-37p4)
J9145 199145 2005 YY128 from CSS (Oct. 28.19-22p4)
G9352 169352 2001 UY16 from LINEAR (Oct. 27.16-20p4 & 28.13-18p5)
G8378 168378 1997 ET30 from La Sagra Obs. (Oct. 27.89-92p3), CSS (Oct. 28.26-28p4), and the SZTE Asteroid Program (Oct. 28.91-92p2)
F4007 154007 2002 BY from MLS (Oct. 28.33-34p4)
E3381 143381 2003 BC21 from Castelmartini Obs. (Oct. 21.83p3) and Atlante Obs. (Oct. 28.88-89p3)
D7062 137062 1998 WM from CSS (Oct. 28.28-30p4)
D7032 137032 1998 UO1 from Castelmartini Obs. (Oct. 21.80p3)
65679 65679 1989 UQ from CSS (Oct. 28.22-24p4)
25916 25916 2001 CP44 from LINEAR (Oct. 28.27-32p5)
17182 17182 1999 VU from MLS (Oct. 28.16-17p4)
16657 16657 1993 UB from SSS (Oct. 28.41-44p4)
12923 12923 Zephyr (1999 GK4) from LINEAR (Oct. 28.14-19p5)
11405 11405 1999 CV3 from LINEAR (Oct. 28.45-50p4)
07336 7336 Saunders (1989 RS1) from LINEAR (Oct. 28.21-26p5)
05869 5869 Tanith (1988 VN4) from Schiaparelli Obs. (Oct. 29.02-04p5)
05011 5011 Ptah (6743 P-L) from LINEAR (Oct. 28.09-11p3)
04688 4688 1980 WF from CSS (Oct. 28.19-21p3)
04401 4401 Aditi (1985 TB) from Desert Moon Obs. (Oct. 28.52p2)
01864 1864 Daedalus (1971 FA) from CSS (Oct. 28.50-52p4)

MPEC 2010-U49 - "02:10 UT" - Comet P/2010 U2 (Hill)

PK10U020 P/2010 U2 (Hill) (q=2.553 AU, Q=6.000 AU, TP=2010 Nov. 9.1448 TT) from Faulkes Telescope North (Oct. 18.52-53p2), Sant Celoni Obs. (Oct. 18.88-90p2), Cielo Profundo Obs. (Oct. 19.01-05p3), Montcabre Obs. (Oct. 19.88-91p3), CAST Obs. (Oct. 21.85p2 & 28.84-85p2), Ka-Dar Obs. TAU Station (Oct. 27.87-88p3), and Purple Mtn. Obs. Xuyi Station (Oct. 28.45-47p2 & 28.56-58p2)

Observers on 29 October '10

A total of 38 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 17 in MPECs 2010-U50, 2010-U51, 2010-U52, 2010-U56 & 2010-U57 -- 2010 UO, 2010 UM, 2010 UH7, 2010 UG7, 2010 UF7, 2010 UE7, 2010 UD, 2010 TZ54, 2010 TY54, 2010 TV149, 2010 TN54, 2010 TF54, 2010 TC55, 2010 SL13, 2010 SK15, 2010 SD13, 2010 PM10
`J51`	Atlante Obs. in the Canary Islands, 3 in MPEC 2010-U50 -- 2010 TJ7, 2007 RU17, 143381
`B75`	Betelgeuse Station in Italy, 1 in MPEC 2010-U50 -- 2003 UV11
`235`	CAST Obs. in Italy, 3 in MPECs 2010-U49, 2010-U54 & 2010-U55 -- P/2010 U2, C/2010 S1, P/2010 R2
`160`	Castelmartini Obs. in Italy, 10 in MPECs 2010-U50, 2010-U53 & 2010-U54 -- 2010 TX168, P/2010 R2, C/2010 R1, 2010 PM10, 2010 LY63, 2007 VG189, 2003 UV11, 153814, 143381, 137032
`703`	Catalina Sky Survey (CSS) in Arizona, 19 in MPECs 2010-U50 & 2010-U57 -- 2010 UH7, 2010 TX168, 2010 TC55, 2010 TC47, 2010 RA147, 2004 VT60, 2004 FU4, 2003 UV11, 2003 TX7, 2003 HQ32, 2001 WT1, 65679, 249595, 216115, 199145, 168378, 137062, 4688, 1864
`J01`	Cielo Profundo Obs. in Spain, 1 in MPEC 2010-U49 -- P/2010 U2
`448`	Desert Moon Obs. in New Mexico, 2 in MPEC 2010-U50 -- 2010 TC47, 4401
`J04`	ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2010-U50 -- 2010 TW54
`F65`	Faulkes Telescope North in Hawaii, 1 in MPEC 2010-U49 -- P/2010 U2
`B21`	Gaisberg Obs. in Austria, 2 in MPECs 2010-U56 & 2010-U57 -- 2010 UH7, 2010 UG7
`H15`	ISON-NM Obs. in New Mexico, 1 in MPEC 2010-U55 -- C/2010 S1
`C32`	Ka-Dar Obs. TAU Station in Russia, 1 in MPEC 2010-U49 -- P/2010 U2
`585`	Kiev Comet Station in the Ukraine, 3 in MPECs 2010-U53, 2010-U54 & 2010-U55 -- C/2010 S1, P/2010 R2, C/2010 R1
`704`	LINEAR in New Mexico, 9 in MPEC 2010-U50 -- 2010 UX6, 2010 UP, 2010 TV149, 25916, 169352, 12923, 11405, 7336, 5011
`J75`	La Sagra Obs. in Spain, 3 in MPEC 2010-U50 -- 2010 RA147, 2010 PM10, 168378
`844`	Los Molinos Obs. in Uruguay, 1 in MPEC 2010-U51 -- 2010 UE7
`C34`	MPC code C34, 1 in MPEC 2010-U50 -- 2010 TC55
`560`	Madonna di Dossobuono Obs. in Italy, 1 in MPEC 2010-U50 -- 2010 UD
`J40`	Malaga Obs. in Spain, 1 in MPEC 2010-U55 -- C/2010 S1
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-U50 -- 2010 SZ16
`213`	Montcabre Obs. in Spain, 2 in MPECs 2010-U49 & 2010-U54 -- P/2010 U2, P/2010 R2
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2010-U50, 2010-U52, 2010-U56 & 2010-U57 -- 2010 UH7, 2010 UG7, 2010 UF7, 17182, 154007
`J47`	Nazaret Obs. in Spain, 1 in MPEC 2010-U54 -- P/2010 R2
`J69`	North Obs. in England, 1 in MPEC 2010-U50 -- 2003 UV11
`A53`	Peschiera del Garda Obs. in Italy, 4 in MPEC 2010-U50 -- 2010 TX168, 2010 TJ7, 2010 TG19, 2007 RU17
`D29`	Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2010-U49 -- P/2010 U2
`H06%`	Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 2 in MPECs 2010-U50 & 2010-U51 -- 2010 UE7, 2003 UV11
`473`	Remanzacco Obs. in Italy, 2 in MPECs 2010-U52 & 2010-U55 -- 2010 UF7, C/2010 S1
`461`	SZTE Asteroid Program in Hungary, 1 in MPEC 2010-U50 -- 168378
`854`	Sabino Canyon Obs. in Arizona, 3 in MPECs 2010-U51, 2010-U56 & 2010-U57 -- 2010 UH7, 2010 UG7, 2010 UE7
`H36`	Sandlot Obs. in Kansas, 4 in MPECs 2010-U51, 2010-U52, 2010-U56 & 2010-U57 -- 2010 UH7, 2010 UG7, 2010 UF7, 2010 UE7
`B70`	Sant Celoni Obs. in Spain, 1 in MPEC 2010-U49 -- P/2010 U2
`204`	Schiaparelli Obs. in Italy, 7 in MPECs 2010-U50, 2010-U51, 2010-U52, 2010-U56 & 2010-U57 -- 2010 UH7, 2010 UG7, 2010 UF7, 2010 UE7, 2010 UB7, 2010 TU149, 5869
`E12`	Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2010-U50 & 2010-U51 -- 2010 UE7, 16657
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2010-U50 -- 2002 GM9
`291`	Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2010-U50 & 2010-U57 -- 2010 UH7, 2010 TR54, 2010 TJ167, 2010 RS3, 2010 MF1, 2010 JG88, 2010 HQ80, 2010 FO92
`A48`	Verona Obs. in Italy, 2 in MPEC 2010-U50 -- 2010 UD, 2010 TF54

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

Impact Risk Monitoring on 29 October '10

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2359 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 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

2010 UC7	JPL Sentry	0122	2092-2109	33	1.9e-05	-4.78	-5.16	0	JPL: "Analysis based on 27 observations spanning .45990 days (2010-Oct-28.43616 to 2010-Oct-28.89606)." Diameter approximately 0.040 km. from mean, weighted H=24.7.

2010 UA7	NEODyS	1710	2052-2086	2	4.27e-10	-8.77	-9.02	0	NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2010/10/28.266 to 2010/10/28.904."
2010 UA7	JPL Sentry	0122	2086-2103	3	4.4e-09	-7.69	-7.80	0	JPL: "Analysis based on 11 observations spanning .63829 days (2010-Oct-28.26478 to 2010-Oct-28.90307)." Diameter approximately 0.081 km. from mean, weighted H=23.1.

2010 UZ6	NEODyS	1710	2061	1	8.01e-09	-8.90	-8.90	0	NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2010/10/28.217 to 2010/10/28.858."
2010 UZ6	JPL Sentry	0122	2061	1	3.5e-08	-8.22	-8.22	0	JPL: "Analysis based on 16 observations spanning .64092 days (2010-Oct-28.21653 to 2010-Oct-28.85745)." Diameter approximately 0.018 km. from mean, weighted H=26.4.

2010 UY6	JPL Sentry	0122	2108	1	1.0e-10	-7.83	-7.83	0	JPL: "Analysis based on 30 observations spanning 5.0626 days (2010-Oct-22.96674 to 2010-Oct-28.02934)." Diameter approximately 0.330 km. from mean, weighted H=20.1.

2010 UX6	JPL Sentry	1710	2079	2	8.1e-07	-5.33	-5.34	0	JPL: "Analysis based on 50 observations spanning 1.0800 days (2010-Oct-27.77604 to 2010-Oct-28.85604)." Diameter approximately 0.085 km. from mean, weighted H=23.0.
2010 UX6	NEODyS	1710	2079	1	8.21e-07	-5.33	-5.33	0	NEODyS: "Based on 50 optical observations (of which 0 are rejected as outliers) from 2010/10/27.777 to 2010/10/28.857."

2010 TU149	NEODyS	1710	R E M O V E D						-

2010 TW54	JPL Sentry	1710	2074-2107	14	3.0e-05	-6.14	-6.17	0	JPL: "Analysis based on 70 observations spanning 4.9304 days (2010-Oct-11.34885 to 2010-Oct-16.27929)." Diameter approximately 0.010 km. from mean, weighted H=27.5.
2010 TW54	NEODyS	1710	2081-2088	4	1.68e-06	-7.31	-7.33	0	NEODyS: "Based on 70 optical observations (of which 0 are rejected as outliers) from 2010/10/11.350 to 2010/10/16.280."

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 29 October '10

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

2124	Grabbed MPEC 2010-U56 - 2010 UG7 - see above Grabbed MPEC 2010-U57 - 2010 UH7 - see above
1825	Grabbed MPEC 2010-U55 - Comet C/2010 S1 (LINEAR) - see above
1710	Noted that NEODyS has removed 2010 TU149 as an impact risk - see above Noted that JPL Sentry has updated its 2010 TW54 risk assessment - see above Noted that NEODyS has updated its 2010 TW54 risk assessment - see above Noted that NEODyS has posted 2010 UA7 as an impact risk - see above Noted that JPL Sentry has updated its 2010 UX6 risk assessment - see above Noted that NEODyS has posted 2010 UX6 as an impact risk - see above Noted that NEODyS has posted 2010 UZ6 as an impact risk - see above Grabbed MPEC 2010-U50 - Daily Orbit Update - see above Grabbed MPEC 2010-U51 - 2010 UE7 - see above Grabbed MPEC 2010-U52 - 2010 UF7 - see above Grabbed MPEC 2010-U53 - Comet C/2010 R1 (LINEAR) - see above Grabbed MPEC 2010-U54 - Comet P/2010 R2 (La Sagra) - see above
0223	Grabbed MPEC 2010-U49 - Comet P/2010 U2 (Hill) - see above
0122	Noted that JPL Sentry has posted 2010 UA7 as an impact risk - see above Noted that JPL Sentry has posted 2010 UC7 as an impact risk - see above Noted that JPL Sentry has posted 2010 UY6 as an impact risk - see above Noted that JPL Sentry has posted 2010 UZ6 as an impact risk - see above

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