2009-01-09 Tracking News

Contents on 9 January '09

IAU Minor Planet Center
- NEOCP Activity -- one listing: 1 updated
- New MPECs -- seven MPECs
Observers -- 46 observing facilities
Impact Risk Monitoring -- three objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Earth's Busy Neighborhood Traffic Report
Ephemerides for risk-rated and nearby objects
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 9 January '09

The MPC's NEO Confirmation Page has 1 listing: 1 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one updated listing. So far The Tracking News has counted a total of two objects listed on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs on 9 January '09

Minor Planet Electronic Circulars

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

MPEC 2009-A49 time-stamped "07:12 UT" - Daily Orbit Update - see below
MPEC 2009-A50 time-stamped "13:08 UT" - 2005 UF1 - see below
MPEC 2009-A51 time-stamped "15:41 UT" - Comet C/2008 X3 (LINEAR) - see below
MPEC 2009-A52 time-stamped "15:46 UT" - Comet C/2008 Y1 (Boattini) - see below
MPEC 2009-A53 time-stamped "15:50 UT" - Comet P/2008 Y2 (Gibbs) - see below
MPEC 2009-A54 time-stamped "15:57 UT" - Comet P/2008 Y3 (McNaught) - see below
MPEC 2009-A55 time-stamped "16:04 UT" - Observations of Comets

MPEC 2009-A55 - "16:04 UT" - Observations of Comets

PK08X040 P/2008 X4 from Yatsuka Obs. (Jan. 7.88p3) and RAS Obs. Mayhill (Jan. 8.54-55p2)
PK08X010 P/2008 X1 (Hill) from Kiev Comet Station (Jan. 5.86-87p3) and Table Mtn. Obs. (Jan. 7.35-36p4)
CK08T020 C/2008 T2 (Cardinal) from Lumezzane Obs. (Dec. 31.09p4), Aravaca Obs. (Jan. 6.89-90p3), and CAST Obs. (Jan. 8.77p1)
CK08S030 C/2008 S3 (Boattini) from the Catalina Sky Survey (CSS) (Jan. 2.20-23p4 & 3.23-26p4)
PK08S010 P/2008 S1 (McNaught) from Mt. John Obs. (Dec. 26.42-43p2) and Schiaparelli Obs. (Jan. 2.75-78p2)
CK08E010 C/2008 E1 (Catalina) from Lumezzane Obs. (Dec. 31.03-04p4), Farm Cove Obs. (Jan. 7.40p3), and Moriyama Obs. (Jan. 7.68-69p2)
CK07S020 C/2007 S2 (Lemmon) from Sandlot Obs. (Jan. 1.34-36p3), Kambah Obs. (Jan. 5.70-71p2), and the Spacewatch 1.8m telescope (Jan. 7.47-50p3)
CK07Q030 C/2007 Q3 (Siding Spring) from Mt. John Obs. (Dec. 26.54-55p3), North Ryde Obs. (Dec. 31.47-48p2, Jan. 4.48-49p2 & 5.45-46p2), Kambah Obs. (Jan. 5.57p2), Farm Cove Obs. (Jan. 7.37p3), and Auckland Obs. (Jan. 8.38p3)
CK07N030 C/2007 N3 (Lulin) from Lulin Minor Bodies Tracking (LIMIT) (Jan. 5.89p1), La Dehesilla Obs. (Jan. 7.26p2), Yatsuka Obs. (Jan. 7.86-87p3), and RAS Mayhill (Jan. 8.53p2)
CK07M020 C/2007 M2 (Catalina) from North Ryde Obs. (Jan. 4.67-69p2 & 5.66-68p2)
CK06W030 C/2006 W3 (Christensen) from Ageo Obs. (Dec. 20.44p3), Los Altos de Arguineguin Obs. (Jan. 5.81p3), Hamamatsu-Yuto Obs. (Jan. 6.38p3), and CAST Obs. (Jan. 8.77p1)
CK06U060 C/2006 U6 (Spacewatch) from Ageo Obs. (Dec. 30.83p2) and Mt. John Obs. (Jan. 4.58-59p3)
CK06Q010 C/2006 Q1 (McNaught) from La Dehesilla Obs. (Jan. 7.25p3) and Yatsuka Obs. (Jan. 7.86p3)
CK06O02F C/2006 OF2 (Broughton) from Gieres Obs. (Jan. 4.93p1), Guadarrama Obs. (Jan. 4.97p2), Carmelita Obs. (Jan. 5.91p3), Los Altos de Arguineguin Obs. (Jan. 6.00-01p3), Hamamatsu-Yuto Obs. (Jan. 6.49-50p3), Aravaca Obs. (Jan. 6.91p3), La Dehesilla Obs. (Jan. 6.00-01p3), Montcabre Obs. (Jan. 7.88-89p3), and CAST Obs. (Jan. 8.78p1)
CK06K040 C/2006 K4 (NEAT) from North Ryde Obs. (Dec. 31.59-63p2) and Farm Cove Obs. (Jan. 4.38-41p3 & 7.40-41p3)
CK06E010 C/2006 E1 (McNaught) from Mt. John Obs. (Dec. 26.52-53p2 & Jan. 4.52p2)
CK05L030 C/2005 L3 (McNaught) from La Dehesilla Obs. (Jan. 7.23-24p3) and Yatsuka Obs. (Jan. 7.85-86p3)
0209P 209P/LINEAR from Malaga Obs. (Jan. 7.00-04p4), La Dehesilla Obs. (Jan. 7.13-15p3), LINEAR (Jan. 7.36-41p3), and Petit Jean Mtn. South Obs. (PJMSO) (Jan. 9.32-34p6)
0206P 206P/Barnard-Boattini from Mt. John Obs. (Dec. 26.49-50p6 & Jan. 4.47-48p2)
0205P 205P/Giacobini from Schiaparelli Obs. (Jan. 2.77p1 & 2.83p1), LINEAR (Jan. 7.07-13p5), and Nazaret Obs. (Jan. 7.81-82p4)
0204P 204P/LINEAR-NEAT from Stixendorf Obs. (Dec. 31.07p3), La Dehesilla Obs. (Jan. 7.04p1), and the Spacewatch 0.9m telescope (Jan. 8.39-43p3)
0195P 195P/Hill from Kambah Obs. (Jan. 5.59-60p2) and Moriyama Obs. (Jan. 7.71-72p2)
0193P 193P/LINEAR-NEAT from Schiaparelli Obs. (Dec. 19.84p1, 19.94p1 & Jan. 3.01p1)
0144P 144P/Kushida from Gieres Obs. (Jan. 4.91p1), Los Altos de Arguineguin Obs. (Jan. 5.91p3), and CAST Obs. (Jan. 8.78p1)
0116P 116P/Wild 4 from Stixendorf Obs. (Dec. 31.10-11p3), Kambah Obs. (Jan. 5.66p2), and La Dehesilla Obs. (Jan. 7.08-09p3)
0094P 94P/Russell 4 from Schiaparelli Obs. (Dec. 19.84p1, Jan. 2.87p1 & 2.99p1)
0077P 77P/Longmore from La Dehesilla Obs. (Jan. 7.12p2) and PJMSO (Jan. 9.41-42p6)
0074P 74P/Smirnova-Chernykh from Stixendorf Obs. (Dec. 31.08-09p3), La Dehesilla Obs. (Jan. 7.06-07p3), and PJMSO (Jan. 9.30-32p6)
0067P 67P/Churyumov-Gerasimenko from Ageo Obs. (Dec. 30.43-44p3), Schiaparelli Obs. (Jan. 2.74-76p3), Nazaret Obs. (Jan. 5.83p3 & 7.79-81p4), Auckland Obs. (Jan. 8.40-41p3), and CAST Obs. (Jan. 8.76p1)
0065P 65P/Gunn from La Dehesilla Obs. (Jan. 7.19-20p3) and PJMSO (Jan. 9.39-41p6)
0047P 47P/Ashbrook-Jackson from Ageo Obs. (Dec. 23.38-39p3) and Altamira Obs. (Dec. 25.83-85p4)
0029P 29P/Schwassmann-Wachmann 1 from Remanzacco Obs. (Dec. 21.97p1), Stixendorf Obs. (Dec. 31.05-06p4), Vallauris Obs. (Jan. 4.92p1), Gieres Obs. (Jan. 4.95p1), Alginet Obs. (Jan. 4.98p3), Guadarrama Obs. (Jan. 4.98-99p2), Wormhout Obs. (Jan. 5.91p1), Los Altos de Arguineguin Obs. (Jan. 6.02-03p3), Aravaca Obs. (Jan. 6.88-89p3 & 7.85-86p3), La Dehesilla Obs. (Jan. 7.01-02p3), Malaga Obs. (Jan. 7.06-08p3), Montcabre Obs. (Jan. 7.91p3), Nazaret Obs. (Jan. 7.94-95p4), El Guijo Obs. (Jan. 7.98-00p3), CAST Obs. (Jan. 8.81p1), and Kiev Comet Station (Jan. 8.83-84p6)
0022P 22P/Kopff from Altamira Obs. (Jan. 3.26-27p3) and La Dehesilla Obs. (Jan. 7.22-23p3)
0019P 19P/Borrelly from Altamira Obs. (Jan. 5.23-25p3), Wormhout Obs. (Jan. 6.16p1), La Dehesilla Obs. (Jan. 7.20-21p3), and PJMSO (Jan. 9.42-44p6)
0017P 17P/Holmes from Paus Obs. (Dec. 18.03p1), Los Altos de Arguineguin Obs. (Jan. 6.04-05p3), and La Dehesilla Obs. (Jan. 7.10-11p2)
0006P 6P/D'Arrest from Ageo Obs. (Dec. 21.46p3) and Schiaparelli Obs. (Jan. 2.77p1 & 2.82p1)

MPEC 2009-A54 - "15:57 UT" - Comet P/2008 Y3 (McNaught)

PK08Y030 P/2008 Y3 (McNaught) (i=38.8°, q=4.434 AU, Q=11.618 AU, TP=2009 Jan. 11.93664 TT) from LIMIT (2007 Dec. 18.76-78p3), the Mt. Lemmon Survey (MLS) (2007 Dec. 31.23-24p4), and Table Mtn. Obs. (Jan. 8.33-34p4)

MPEC 2009-A53 - "15:50 UT" - Comet P/2008 Y2 (Gibbs)

PK08Y020 P/2008 Y2 (Gibbs) (q=1.638 AU, Q=5.542 AU, TP=2009 Jan. 22.4338 TT) from Table Mtn. Obs. (Jan. 7.42-43p4), Moriyama Obs. (Jan. 7.76-77p2), Kiev Comet Station (Jan. 8.00-01p3), and PJMSO (Jan. 9.29-30p7)

MPEC 2009-A52 - "15:46 UT" - Comet C/2008 Y1 (Boattini)

CK08Y010 C/2008 Y1 (Boattini) (i=9.0°, q=1.416 AU, TP=2009 Feb. 16.671 TT) from PJMSO (Jan. 8.03-04p6 & 9.03-05p9)

MPEC 2009-A51 - "15:41 UT" - Comet C/2008 X3 (LINEAR)

CK08X030 C/2008 X3 (LINEAR) (i=66.5°, q=1.902 AU, Q=84.247 AU, TP=2008 Oct. 10.5633 TT) from Ageo Obs. (Jan. 2.82p3), La Dehesilla Obs. (Jan. 7.17-18p2), Table Mtn. Obs. (Jan. 7.50-51p4), LINEAR (Jan. 8.41-45p3), and PJMSO (Jan. 9.37-38p4)

MPEC 2009-A50 - "13:08 UT" - 2005 UF1

K05U01F 2005 UF1 (H=20.5 ~269m) from David Tholen's team on Mauna Kea (2008 Oct. 21.24p1 at R=23.3 & 2008 Oct. 22.25p1 at R=23.7)

<< DOU on 9 Jan. '09 >> MPEC 2009-A49 - "07:12 UT" - Daily Orbit Update

Observations of risk-listed objects
K09A00V 2009 AV (i=45.9°, arc=6 days, H=17.9 ~891m) from Spacewatch 1.8m (Jan. 8.52-53p3)
K08Y29F 2008 YF29 (small asteroid, arc=9 days, H=24.1 ~51m) from Spacewatch 1.8m (Jan. 8.34p1)
Observations of recently (no longer) risk-listed objects
K08Y30U 2008 YU30 (small asteroid, arc=8 days, H=23.2 ~78m) from Desert Moon Obs. (Jan. 8.44p1)
K08Y29A 2008 YA29 (small asteroid, arc=9 days, H=24.8 ~37m) from Spacewatch 1.8m (Jan. 8.37-38p3)
Observations of other objects
K09A15L 2009 AL15 (arc=1 day, H=21.3 ~186m) from Astronomical Research Obs. (ARO) (Jan. 8.32-33p3)
K09A15K 2009 AK15 (arc=2 days, H=19.4 ~446m) from the Siding Spring Survey (SSS) (Jan. 8.52p1 & 8.71p5)
K09A00T 2009 AT (Q=7.070 AU, arc=6 days, H=21.0 ~214m) from Desert Moon Obs. (Jan. 8.28-32p3)
K09A00N 2009 AN (arc=7 days, H=20.5 ~269m) from Spacewatch 0.9m (Jan. 7.36-40p3) and Desert Moon Obs. (Jan. 8.35-40p3)
K08Y30E 2008 YE30 (Q=4.099 AU, arc=17 days, H=21.1 ~204m) from Spacewatch 1.8m (Jan. 8.35-36p3)
K08Y27S 2008 YS27 (arc=10 days, H=21.2 ~195m) from Spacewatch 1.8m (Jan. 8.49-50p3)
K08CB6H 2008 CH116 (q=0.273 AU, arc=2 opp, H=19.0 ~537m) from Desert Moon Obs. (Jan. 8.52-54p2)
K06U63C 2006 UC63 (arc=2 opp, H=19.8 ~371m) from Desert Moon Obs. (Jan. 8.17-24p3)
K01P01D 2001 PD1 (arc=3 opp, H=18.2 ~776m) from Spacewatch 1.8m (Jan. 8.38-41p3 at V=21.9-22.3)
K00E26L 2000 EL26 (arc=5 opp, H=18.6 ~645m) from Spacewatch 1.8m (Jan. 8.54p3 at V=22.5)
J98W30T 1998 WT30 (arc=4 opp, H=19.8 ~371m) from Spacewatch 0.9m (Jan. 8.52-54p3)
J4386 194386 2001 VG5 from Thompsonville Obs. (Jan. 9.08-10p6)
H5706 175706 1996 FG3 from Spacewatch 1.8m (Jan. 8.51-52p3)
G2900 162900 2001 HG31 from Thompsonville Obs. (Jan. 9.06-07p6)
G1989 161989 Cacus (1978 CA) from SSS (Jan. 8.74-75p4)
F9923 159923 2004 YJ32 from Spacewatch 0.9m (Jan. 8.45-50p3)
F9368 159368 1979 QB from Spacewatch 0.9m (Jan. 8.45-49p3)
F5334 155334 2006 DZ169 from Spacewatch 0.9m (Jan. 8.52-55p3)
F2931 152931 2000 EA107 from LINEAR (Jan. 8.43-47p5)
E2348 142348 2002 RX211 from program code "\" (26) via RAS Obs. Mayhill (Jan. 8.44-45p2)
68350 68350 2001 MK3 from Desert Moon Obs. (Jan. 8.49-50p5)
35107 35107 1991 VH from Starkenburg Obs. (Jan. 8.85p3)
19764 19764 2000 NF5 from Spacewatch 0.9m (Jan. 8.42-43p2)
05332 5332 Davidaguilar (1990 DA) from Thompsonville Obs. (Jan. 9.03-04p6)
04957 4957 Brucemurray (1990 XJ) from SSS (Jan. 8.60-62p3)
04179 4179 Toutatis (1989 AC) from Starkenburg Obs. (Jan. 8.86-87p3)
01980 1980 Tezcatlipoca (1950 LA) from Thompsonville Obs. (Jan. 9.01-02p5)
01627 1627 Ivar (1929 SH) from Thompsonville Obs. (Jan. 9.04-06p6)

Observers on 9 January '09

A total of 46 observing facilities appear in today's MPECs.

Code	Observer / observatory
`349`	Ageo Obs. in Japan, 6 in MPECs 2009-A51 & 2009-A55 -- C/2008 X3, C/2006 W3, C/2006 U6, 67P, 47P, 6P
`J97`	Alginet Obs. in Spain, 1 in MPEC 2009-A55 -- 29P
`J24`	Altamira Obs. in Spain, 3 in MPEC 2009-A55 -- 47P, 22P, 19P
`J20`	Aravaca Obs., 3 in MPEC 2009-A55 -- C/2008 T2, C/2006 OF2, 29P
`H55`	Astronomical Research Obs. in Illinois, 1 in MPEC 2009-A49 -- 2009 AL15
`467`	Auckland Obs. in New Zealand, 2 in MPEC 2009-A55 -- C/2007 Q3, 67P
`235`	CAST Obs. in Italy, 6 in MPEC 2009-A55 -- C/2008 T2, C/2006 W3, C/2006 OF2, 144P, 67P, 29P
`B20`	Carmelita Obs. in Spain, 1 in MPEC 2009-A55 -- C/2006 OF2
`703`	Catalina Sky Survey in Arizona, 1 in MPEC 2009-A55 -- C/2008 S3
`448`	Desert Moon Obs. in New Mexico, 6 in MPEC 2009-A49 -- 2009 AT, 2009 AN, 2008 YU30, 2008 CH116, 2006 UC63, 68350
`J27`	El Guijo Obs. in Spain, 1 in MPEC 2009-A55 -- 29P
`E85`	Farm Cove Obs. in New Zealand, 3 in MPEC 2009-A55 -- C/2008 E1, C/2007 Q3, C/2006 K4
`B83`	Gieres Obs., 3 in MPEC 2009-A55 -- C/2006 OF2, 144P, 29P
`458`	Guadarrama Obs. in Spain, 2 in MPEC 2009-A55 -- C/2006 OF2, 29P
`379`	Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2009-A55 -- C/2006 W3, C/2006 OF2
`415`	Kambah Obs. in the Australian Capital Territory, 4 in MPEC 2009-A55 -- C/2007 S2, C/2007 Q3, 195P, 116P
`585`	Kiev Comet Station in the Ukraine, 3 in MPECs 2009-A53 & 2009-A55 -- P/2008 Y2, P/2008 X1, 29P
`704`	LINEAR in New Mexico, 4 in MPECs 2009-A49, 2009-A51 & 2009-A55 -- C/2008 X3, 152931, 209P, 205P
`212`	La Dehesilla Obs. in Spain, 15 in MPECs 2009-A51 & 2009-A55 -- C/2008 X3, C/2007 N3, C/2006 Q1, C/2006 OF2, C/2005 L3, 209P, 204P, 116P, 77P, 74P, 65P, 29P, 22P, 19P, 17P
`J55`	Los Altos de Arguineguin Obs. in the Canary Islands, 5 in MPEC 2009-A55 -- C/2006 W3, C/2006 OF2, 144P, 29P, 17P
`D35`	Lulin Minor Bodies Tracking (LIMIT) in Taiwan, 2 in MPECs 2009-A54 & 2009-A55 -- P/2008 Y3, C/2007 N3
`130`	Lumezzane Obs. in Italy, 2 in MPEC 2009-A55 -- C/2008 T2, C/2008 E1
`J40`	Malaga Obs. in Spain, 2 in MPEC 2009-A55 -- 209P, 29P
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2009-A50 -- 2005 UF1
`213`	Montcabre Obs. in Spain, 2 in MPEC 2009-A55 -- C/2006 OF2, 29P
`900`	Moriyama Obs. in Japan, 3 in MPECs 2009-A53 & 2009-A55 -- P/2008 Y2, C/2008 E1, 195P
`474`	Mt. John Obs. in New Zealand, 5 in MPEC 2009-A55 -- P/2008 S1, C/2007 Q3, C/2006 U6, C/2006 E1, 206P
`G96`	Mt. Lemmon Survey in Arizona, 1 in MPEC 2009-A54 -- P/2008 Y3
`J47`	Nazaret Obs. in Spain, 3 in MPEC 2009-A55 -- 205P, 67P, 29P
`423`	North Ryde Obs. in New South Wales, 3 in MPEC 2009-A55 -- C/2007 Q3, C/2007 M2, C/2006 K4
`B49`	Paus Obs. in Spain, 1 in MPEC 2009-A55 -- 17P
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 8 in MPECs 2009-A51, 2009-A52, 2009-A53 & 2009-A55 -- P/2008 Y2, C/2008 Y1, C/2008 X3, 209P, 77P, 74P, 65P, 19P
`H06`	RAS Obs. Mayhill in New Mexico, 2 in MPEC 2009-A55 -- P/2008 X4, C/2007 N3
`H06\`	program code "\" (26) via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-A49 -- 142348
`473`	Remanzacco Obs. in Italy, 1 in MPEC 2009-A55 -- 29P
`H36`	Sandlot Obs. in Kansas, 1 in MPEC 2009-A55 -- C/2007 S2
`204`	Schiaparelli Obs. in Italy, 6 in MPEC 2009-A55 -- P/2008 S1, 205P, 193P, 94P, 67P, 6P
`E12`	Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2009-A49 -- 2009 AK15, 161989, 4957
`691`	Spacewatch 0.9m telescope in Arizona, 7 in MPECs 2009-A49 & 2009-A55 -- 2009 AN, 1998 WT30, 19764, 159923, 159368, 155334, 204P
`291`	Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2009-A49 & 2009-A55 -- 2009 AV, 2008 YS27, 2008 YF29, 2008 YE30, 2008 YA29, C/2007 S2, 2001 PD1, 2000 EL26, 175706
`611`	Starkenburg Obs. in Germany, 2 in MPEC 2009-A49 -- 35107, 4179
`A71`	Stixendorf Obs. in Austria, 4 in MPEC 2009-A55 -- 204P, 116P, 74P, 29P
`673`	Table Mtn. Obs. in southern California, 4 in MPECs 2009-A51, 2009-A53, 2009-A54 & 2009-A55 -- P/2008 Y3, P/2008 Y2, C/2008 X3, P/2008 X1
`H53`	Thompsonville Obs. in Illinois, 5 in MPEC 2009-A49 -- 194386, 162900, 5332, 1980, 1627
`B51`	Vallauris Obs. in France, 1 in MPEC 2009-A55 -- 29P
`A11`	Wormhout Obs. in France, 2 in MPEC 2009-A55 -- 29P, 19P
`367`	Yatsuka Obs. in Japan, 4 in MPEC 2009-A55 -- P/2008 X4, C/2007 N3, C/2006 Q1, C/2005 L3

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

Impact Risk Monitoring on 9 January '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.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
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 AM15	NEODyS	1535	2013-2089	17	1.38e-07	-2.70	-3.13	0	NEODyS: "Based on 8 optical observations (of which 0 are rejected as outliers) from 2009/01/06.619 to 2009/01/08.715."

2009 AV	JPL Sentry	1535	R E M O V E D						JPL: Risk listing removed at 1051 UTC.
2009 AV	NEODyS	1535	R E M O V E D						-

2008 YF29	NEODyS	1535	2090	1	1.87e-07	-6.62	-6.62	0	NEODyS: "Based on 46 optical observations (of which 0 are rejected as outliers) from 2008/12/30.250 to 2009/01/08.344."

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 9 January '09

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

1620	Grabbed MPEC 2009-A51 - Comet C/2008 X3 (LINEAR) - see above Grabbed MPEC 2009-A52 - Comet C/2008 Y1 (Boattini) - see above Grabbed MPEC 2009-A53 - Comet P/2008 Y2 (Gibbs) - see above Grabbed MPEC 2009-A54 - Comet P/2008 Y3 (McNaught) - see above Grabbed MPEC 2009-A55 - Observations of Comets - see above
1535	Noted that NEODyS has updated its 2008 YF29 risk assessment - see above Noted that NEODyS has posted 2009 AM15 as an impact risk - see above Noted that JPL Sentry has removed 2009 AV as an impact risk - see above Noted that NEODyS has removed 2009 AV as an impact risk - see above Grabbed MPEC 2009-A49 - Daily Orbit Update - see above Grabbed MPEC 2009-A50 - 2005 UF1 - see above

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