2008-12-30 Tracking News

Contents on 30 December '08

Radar Astrometry -- three objects
IAU Minor Planet Center
- NEOCP Activity -- two listings: 1 new, 1 updated
- New MPECs -- fifteen MPECs
Observers -- 32 observing facilities
Impact Risk Monitoring -- seven 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.

Radar Astrometry on 30 December '08

Radar observation of three objects

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

Data update noted at 2210 UTC when the database was dated 30 Dec.

2008 UE7 from Arecibo (Dec. 15.39 velocity & 15.46 range)
2004 XL14 from Arecibo (Dec. 17.41 range, 18.40 velocity, 18.44 velocity & 18.44 range)
2004 LV3 from Arecibo (Dec. 26.86 velocity, 26.87 range, 26.94 range, 29.94 velocity & 29.95 range)

NEOCP Activity on 30 December '08

The MPC's NEO Confirmation Page has 2 listings: 1 new, 1 updated

When last checked at 2259 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and one updated listing. Both of these were "one nighters." The Tracking News counted a total of fifteen objects listed on the NEOCP at some point on this day.

New MPECs on 30 December '08

Minor Planet Electronic Circulars

There were fifteen MPECs issued this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-Y64 time-stamped "00:13 UT" - 2008 YN27 - see below
MPEC 2008-Y65 time-stamped "00:16 UT" - 2008 YO27 - see below
MPEC 2008-Y66 time-stamped "07:07 UT" - Daily Orbit Update - see below
MPEC 2008-Y67 time-stamped "15:03 UT" - 2008 YQ27 - see below
MPEC 2008-Y68 time-stamped "15:06 UT" - 2008 YR27 - see below
MPEC 2008-Y69 time-stamped "15:09 UT" - 2008 YS27 - see below
MPEC 2008-Y70 time-stamped "17:44 UT" - 2008 YZ28 - see below
MPEC 2008-Y71 time-stamped "19:06 UT" - 2008 YA29 - see below
MPEC 2008-Y72 time-stamped "19:08 UT" - 2008 YB29 - see below
MPEC 2008-Y73 time-stamped "19:12 UT" - 2008 YC29 - see below
MPEC 2008-Y74 time-stamped "19:57 UT" - 2004 XA192, 2006 UO321 - see below
MPEC 2008-Y75 time-stamped "20:57 UT" - 2008 YE29 - see below
MPEC 2008-Y76 time-stamped "21:00 UT" - 2008 YF29 - see below
MPEC 2008-Y77 time-stamped "21:04 UT" - 2008 YG29 - see below
MPEC 2008-Y78 time-stamped "21:44 UT" - 2008 YD29

MPEC 2008-Y78 - "21:44 UT" - 2008 YD29

K08Y29D 2008 YD29 (borderline-small, Q=5.190 AU, H=21.9 ~141m) was discovered at 0152 UT on 30 Dec. by the Spacewatch 0.9m telescope, which observed it at Dec. 30.08-11p3. The discovery was confirmed by the Spacewatch 1.8m telescope (Dec. 30.14-15p3 & 30.32-33p3), Sandlot Obs. (Dec. 30.15-17p3), Magdalena Ridge Obs. (MRO) (Dec. 30.19-22p5), and Great Shefford Obs. (Dec. 30.83-86p3).

MPEC 2008-Y77 - "21:04 UT" - 2008 YG29

K08Y29G 2008 YG29 (small asteroid, H=24.0 ~54m) was discovered at 0609 UT on 30 Dec. by the Mt. Lemmon Survey (MLS), which observed it at Dec. 30.26-28p4 and 30.39-41p3. The discovery was confirmed by Sabino Canyon Obs. (Dec. 30.34-35p3) and MRO (Dec. 30.35-36p5).

MPEC 2008-Y76 - "21:00 UT" - 2008 YF29

K08Y29F 2008 YF29 (risk-listed, Q=4.203 AU, Earth MOID=1.9 LD, H=24.0 ~54m) was discovered at 0558 UT on 30 Dec. by the Catalina Sky Survey (CSS), which observed it at Dec. 30.25-27p4 and 30.33p5. The discovery was confirmed by Sabino Canyon Obs. (Dec. 30.32-33p3), MRO (Dec. 30.33-34p4), Farra d'Isonzo Obs. (Dec. 30.80-82p2), and Starkenburg Obs. (Dec. 30.81-82p3). This object will be coming within ten lunar distances (LD) of Earth, reaching 9.6 LD on 11 Jan.

MPEC 2008-Y75 - "20:57 UT" - 2008 YE29

K08Y29E 2008 YE29 (risk-listed, H=20.1 ~323m) was discovered at 0524 UT on 30 Dec. by CSS, which observed it at Dec. 30.23-24p4. The discovery was confirmed by MRO (Dec. 30.28-30p4), Sabino Canyon Obs. (Dec. 30.30-31p3), E. Guido via RAS Obs. Mayhill (Dec. 30.36-39p3), Drebach Obs. (Dec. 30.73-75p3), Starkenburg Obs. (Dec. 30.78-79p3), and Guidestar Obs. (Dec. 30.83-85p3).

MPEC 2008-Y74 - "19:57 UT" - 2004 XA192, 2006 UO321

K06UW1O 2006 UO321 (KBO, q=40.663 AU, Q=46.925 AU, H=6.7 ~155 km) from Cerro Tololo Inter-American Obs. (CTIO) (2005 Aug. 9.18p1 at R=22.6, 2005 Aug. 10.17p1 & 2005 Aug. 10.30p1) and Kitt Peak Natl. Obs. (KPNO) (Dec. 21.15p1 at r=22.6, 22.11p1 at r=22.5 & 22.19p1 at r=22.7)
K04XJ2A 2004 XA192 (i=38.1°, q=35.433 AU, Q=58.289 AU, H=3.6 ~645 km) from NEAT's Mt. Palomar telescope (2005 Nov. 5.44p1 & 2005 Nov. 5.50p1) and KPNO (Dec. 21.37p1, 21.43p1 & 22.37p1)

MPEC 2008-Y73 - "19:12 UT" - 2008 YC29

K08Y29C 2008 YC29 (small asteroid, Earth MOID=2.9 LD, H=25.2 ~31m) was discovered at 1008 UT on 30 Dec. by CSS, which observed it at Dec. 30.42-47p7 and 30.56p4. The discovery was confirmed by MRO (Dec. 30.46-47p5) and Sabino Canyon Obs. (Dec. 30.49p2). This object is now within ten lunar distances (LD) of Earth, reaching 3.4 LD on 1 Jan.

MPEC 2008-Y72 - "19:08 UT" - 2008 YB29

K08Y29B 2008 YB29 (risk-listed, Q=4.053 AU, Earth MOID=7.3 LD, H=25.7 ~25m) was discovered at 0918 UT on 30 Dec. by CSS, which observed it at Dec. 30.39-44p8 and 30.56p4. The discovery was confirmed by MRO (Dec. 30.44-45p6) and Sabino Canyon Obs. (Dec. 30.48p2). This object is now within ten lunar distances (LD) of Earth, reaching 8.5 LD on 30 Dec.

MPEC 2008-Y71 - "19:06 UT" - 2008 YA29

K08Y29A 2008 YA29 (risk-listed, H=24.7 ~39m) was discovered at 0658 UT on 30 Dec. by MLS, which observed it at Dec. 30.29-32p4 and 30.37-41p4. The discovery was confirmed by MRO (Dec. 30.37-39p5) and Spacewatch 1.8m (Dec. 30.39p3).

MPEC 2008-Y70 - "17:44 UT" - 2008 YZ28

K08Y28Z 2008 YZ28 (Q=4.677 AU, H=19.9 ~355m) was discovered at 0343 UT on 30 Dec. by MLS, which observed it at Dec. 30.15-24p8. The discovery was confirmed by Sabino Canyon Obs. (Dec. 30.22-23p3), MRO (Dec. 30.23p4), and Drebach Obs. (Dec. 30.71-72p3).

MPEC 2008-Y69 - "15:09 UT" - 2008 YS27

K08Y27S 2008 YS27 (Earth MOID=8.2 LD, H=21.1 ~204m) was discovered at 1129 UT on 29 Dec. by MLS, which observed it at Dec. 29.48-54p8 and 30.51-54p4. The discovery was confirmed by CSS (Dec. 29.56p4), Great Shefford Obs. (Dec. 30.09-11p3), MRO (Dec. 30.42-44p4), and Sabino Canyon Obs. (Dec. 30.50p2).

MPEC 2008-Y68 - "15:06 UT" - 2008 YR27

K08Y27R 2008 YR27 (H=18.1 ~812m) was discovered at 0640 UT on 29 Dec. by MLS, which observed it at Dec. 7.37-38p4 at V=21.0-22.4, 29.28-35p8 at V=19.9-20.3, and 30.26-28p4 at V=20.0-20.4. The discovery was confirmed by MRO (Dec. 29.38-40p4 & 30.39-41p4), Spacewatch 1.8m (Dec. 29.43-44p3), Sandlot Obs. (Dec. 29.43-45p3), Guidestar Obs. (Dec. 29.84-89p3), Naef Obs. (Dec. 29.93-95p2), Great Shefford Obs. (Dec. 30.02-08p4), Astronomical Research Obs. (ARO) (Dec. 30.24-25p3), and Sabino Canyon Obs. (Dec. 30.37-38p3).

MPEC 2008-Y67 - "15:03 UT" - 2008 YQ27

K08Y27Q 2008 YQ27 (small asteroid, Earth MOID=0.1 LD, H=22.5 ~107m) was discovered at 0149 UT on 28 Dec. by LINEAR, which observed it at Dec. 28.08-13p5. The discovery was confirmed by Remanzacco Obs. (Dec. 29.81p2), Sandlot Obs. (Dec. 30.12p3), MRO (Dec. 30.14-15p6), and Sabino Canyon Obs. (Dec. 30.19p4).

<< DOU on 30 Dec. '08 >> MPEC 2008-Y66 - "07:07 UT" - Daily Orbit Update

Observations of risk-listed objects
K08Y03C 2008 YC3 (small asteroid, arc=7 days, H=25.4 ~28m) from ARO (Dec. 29.11-12p3)
K08X02U 2008 XU2 (small asteroid, arc=23 days, H=25.5 ~27m) from MRO (Dec. 29.15-16p2 at R=22.5-6 & 29.21p1 at R=22.7)
K08W94Y 2008 WY94 (small asteroid, arc=30 days, H=25.6 ~26m) from MRO (Dec. 29.50-51p2 at R=22.7-23.2)
Observations of recently (no longer) risk-listed objects
K08Y03J 2008 YJ3 (arc=8 days, H=20.2 ~309m) from ARO (Dec. 29.16-17p3) and Spacewatch 1.8m (Dec. 30.26-27p3)
K08Y02N 2008 YN2 (small asteroid, arc=8 days, H=26.3 ~19m) from ARO (Dec. 29.09-11p3 at V=21.9-22.1)
K08X02Q 2008 XQ2 (arc=25 days, H=19.9 ~355m) from Great Shefford Obs. (Dec. 30.16-17p3)
K08X02O 2008 XO2 (arc=24 days, H=18.6 ~645m) from Spacewatch 1.8m (Dec. 29.27-28p3 at V=21.9-22.3)
K08X00N 2008 XN (arc=27 days, H=21.4 ~178m) from Desert Moon Obs. (Dec. 29.26-32p3)
K08W64M 2008 WM64 (arc=35 days, H=20.5 ~269m) from Spacewatch 1.8m (Dec. 29.45-46p3)
K08W13Z 2008 WZ13 (arc=40 days, H=18.6 ~645m) from Spacewatch 1.8m (Dec. 30.23-25p3)
Observations of small asteroids (H>22.0)
K08Y02P 2008 YP2 (arc=9 days, H=23.3 ~74m) from Spacewatch 1.8m (Dec. 30.15-16p3)
K08Y02M 2008 YM2 (arc=8 days, H=24.0 ~54m) from ARO (Dec. 29.16-17p3)
K08W14D 2008 WD14 (arc=38 days, H=22.9 ~89m) from ARO (Dec. 29.23-25p3)
K07U01Y 2007 UY1 (arc=2 opp, H=22.8 ~93m) from Naef Obs. (Dec. 29.90-94p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K08Y03G 2008 YG3 (Q=4.006 AU, arc=7 days, H=22.0 ~135m) from ARO (Dec. 29.20-21p3)
Observations of other objects
K08Y26G 2008 YG26 (arc=1 day, H=21.4 ~178m) from Great Shefford Obs. (Dec. 29.75-76p3) and Farra d'Isonzo Obs. (Dec. 29.75-78p3)
K08Y03E 2008 YE3 (arc=7 days, H=20.8 ~234m) from Petit Jean Mtn. South Obs. (PJMSO) (Dec. 29.34-35p7)
K08Y02K 2008 YK2 (arc=9 days, H=19.5 ~426m) from Hormersdorf Obs. (Dec. 28.97p4) and Hamamatsu-Yuto Obs. (Dec. 29.71-74p4)
K08X02V 2008 XV2 (arc=23 days, H=20.3 ~295m) from LINEAR (Dec. 29.27-32p4)
K08X02E 2008 XE2 (arc=25 days, H=19.2 ~490m) from PJMSO (Dec. 29.32p6)
K08X01B 2008 XB1 (arc=26 days, H=20.9 ~224m) from ARO (Dec. 29.13p4) and MLS (Dec. 29.17-20p4)
K08X00M 2008 XM (q=0.111 AU, arc=28 days, H=19.8 ~371m) from Spacewatch 1.8m (Dec. 30.18-19p3 at V=22.1)
K08W94Z 2008 WZ94 (q=0.345 AU, arc=30 days, H=20.1 ~323m) from ARO (Dec. 29.09-10p3) and Spacewatch 1.8m (Dec. 30.17-18p3)
K08W63Q 2008 WQ63 (arc=37 days, H=20.1 ~323m) from PJMSO (Dec. 29.31p7) and Hamamatsu-Yuto Obs. (Dec. 29.77-78p4)
K08W60L 2008 WL60 (arc=36 days, H=18.2 ~776m) from Hamamatsu-Yuto Obs. (Dec. 29.67-69p6) and Madonna di Dossobuono Obs. (Dec. 29.95p3)
K08W60H 2008 WH60 (arc=36 days, H=20.8 ~234m) from ARO (Dec. 29.14-15p3)
K08V14K 2008 VK14 (arc=51 days, H=19.3 ~467m) from PJMSO (Dec. 29.27-28p6) and Madonna di Dossobuono Obs. (Dec. 29.87-88p3)
K08V04U 2008 VU4 (Q=4.210 AU, arc=52 days, H=17.6 ~1.02 km) from PJMSO (Dec. 29.26-27p6)
K08U95C 2008 UC95 (arc=61 days, H=18.5 ~676m) from PJMSO (Dec. 29.33p6)
K08U07E 2008 UE7 (arc=60 days, H=20.4 ~282m) from Marana Obs. (Dec. 7.92p5)
K08U05W 2008 UW5 (arc=64 days, H=18.1 ~812m) from ARO (Dec. 29.03-06p3)
K08TG6N 2008 TN166 (Q=5.003 AU, arc=26 days, H=13.9 ~5.62 km, q=1.223 AU) from MLS (Oct. 7.33-37p4 discovery & Oct. 26.25-26p4) and CSS (Nov. 2.30-32p4)
K08T04F 2008 TF4 (arc=84 days, H=19.3 ~467m) from ARO (Dec. 29.05-08p3 at V=22.1-2)
K08S85C 2008 SC85 (arc=93 days, H=19.4 ~446m) from ARO (Dec. 29.06-08p3)
K08S82J 2008 SJ82 (arc=93 days, H=20.6 ~257m) from ARO (Dec. 29.12-15p3 at V=21.9-22.1)
K08S82H 2008 SH82 (arc=95 days, H=21.3 ~186m) from ARO (Dec. 29.17p3), PJMSO (Dec. 29.25-26p9), Hamamatsu-Yuto Obs. (Dec. 29.65-66p3), and Madonna di Dossobuono Obs. (Dec. 29.86-87p3)
K08S01Q 2008 SQ1 (Q=4.682 AU, arc=2 opp, H=18.5 ~676m) from PJMSO (Dec. 29.25p6), Madonna di Dossobuono Obs. (Dec. 29.85-86p3), and Fiamene Obs. (Dec. 29.86p4)
K08S00E 2008 SE (arc=100 days, H=19.4 ~446m) from ARO (Dec. 29.18-19p3)
K08R26T 2008 RT26 (arc=114 days, H=19.4 ~446m) from Fiamene Obs. (Dec. 29.93-94p3)
K08M01N 2008 MN1 (i=37.2°, arc=183 days, H=20.1 ~323m) from ARO (Dec. 29.22-23p3)
K08M00Z 2008 MZ (Q=4.207 AU, arc=197 days, H=18.6 ~645m) from Fiamene Obs. (Dec. 29.87-88p2)
K08E05V 2008 EV5 (arc=2 opp, H=20.1 ~323m) from PJMSO (Dec. 29.28-29p7)
K07Y00Z 2007 YZ (arc=2 opp, H=19.6 ~407m) from LINEAR (Dec. 28.14-19p5) and CSS (Dec. 29.14-16p4)
K06SL7Z 2006 SZ217 (arc=3 opp, H=17.4 ~1.12 km) from the Siding Spring Survey (SSS) (Dec. 29.52-55p4)
K05V05O 2005 VO5 (arc=2 opp, H=19.8 ~371m) from Spacewatch 1.8m (Dec. 30.21p3)
K05T51Z 2005 TZ51 (arc=3 opp, H=17.9 ~891m) from Fiamene Obs. (Dec. 29.89-90p4)
K05N01J 2005 NJ1 (arc=4 opp, H=18.7 ~616m) from CSS (Dec. 29.49-51p4)
K05B00C 2005 BC (arc=2 opp, H=18.0 ~851m) from PJMSO (Dec. 29.36p5) and Hamamatsu-Yuto Obs. (Dec. 29.81-85p7)
K04L03V 2004 LV3 (arc=2 opp, H=18.8 ~589m) from Hamamatsu-Yuto Obs. (Dec. 29.51-54p8) and Thompsonville Obs. (Dec. 30.05-06p6)
K04K00T 2004 KT (i=43.7°, arc=2 opp, H=18.0 ~851m) from Desert Moon Obs. (Dec. 29.07-10p2 & 29.15p1)
K03Y01X 2003 YX1 (arc=2 opp, H=20.9 ~224m) from Spacewatch 1.8m (Dec. 29.36-37p3) and Desert Moon Obs. (Dec. 29.48-53p3)
K03Y01O 2003 YO1 (arc=4 opp, H=19.5 ~426m) from CSS (Dec. 29.23-25p4)
K03X22B 2003 XB22 (arc=3 opp, H=19.2 ~490m) from LINEAR (Dec. 28.33-38p4)
K01F09X 2001 FX9 (arc=4 opp, H=18.6 ~645m) from CSS (Dec. 29.32-34p4)
K00QD0J 2000 QJ130 (arc=3 opp, H=19.4 ~446m) from ARO (Dec. 29.18-21p3 at V=21.8-22.1)
K00O00M 2000 OM (arc=3 opp, H=18.6 ~645m) from CSS (Dec. 29.17-19p4)
K00E70W 2000 EW70 (arc=2 opp, H=21.2 ~195m) from Desert Moon Obs. (Dec. 29.37-44p3)
J9801 199801 2007 AE12 from LINEAR (Dec. 29.23-25p3)
J4386 194386 2001 VG5 from LINEAR (Dec. 28.20-25p5 & 29.19-24p5) and Thompsonville Obs. (Dec. 30.14-15p6)
I6844 186844 2004 GA1 from Spacewatch 0.9m (Dec. 29.13-17p3)
G3014 163014 2001 UA5 from LINEAR (Dec. 29.07-12p5)
G2900 162900 2001 HG31 from Thompsonville Obs. (Dec. 30.12-13p6)
G2361 162361 2000 AF6 from LINEAR (Dec. 28.26-32p5)
F9923 159923 2004 YJ32 from Spacewatch 0.9m (Dec. 29.47-51p3)
F3814 153814 2001 WN5 from Spacewatch 0.9m (Dec. 29.18-22p3) and LINEAR (Dec. 29.28-30p3)
F3220 153220 2000 YN29 from Spacewatch 0.9m (Dec. 29.08-11p3)
E2348 142348 2002 RX211 from Spacewatch 1.8m (Dec. 29.22p3)
E1052 141052 2001 XR1 from Mirasteilas Obs. (Dec. 30.01-02p2)
D7805 137805 1999 YK5 from Marana Obs. (Dec. 20.91p5)
D6849 136849 1998 CS1 from LINEAR (Dec. 28.32-38p10)
99935 99935 2002 AV4 from MLS (Dec. 29.48-51p4)
96315 96315 1997 AP10 from Spacewatch 0.9m (Dec. 29.29-33p3)
89355 89355 2001 VS78 from LINEAR (Dec. 28.27-32p5)
85236 85236 1993 KH from Deep Sky Obs. (Dec. 28.85-88p6)
22099 22099 2000 EX106 from CSS (Dec. 29.25-27p4)
19356 19356 1997 GH3 from LINEAR (Dec. 29.48-52p4)
18106 18106 Blume (2000 NX3) from Spacewatch 0.9m (Dec. 29.30-34p3)
16834 16834 1997 WU22 from CSS (Dec. 29.35-37p4)
14402 14402 1991 DB from CSS (Dec. 29.44-46p4)
08567 8567 1996 HW1 from Thompsonville Obs. (Dec. 30.08-10p6)
07358 7358 Oze (1995 YA3) from LINEAR (Dec. 29.27-32p5)
06569 6569 Ondaatje (1993 MO) from LINEAR (Dec. 29.25-30p5)
06053 6053 1993 BW3 from SSS (Dec. 29.69-73p3)
04183 4183 Cuno (1959 LM) from LINEAR (Dec. 29.08-13p5)
04179 4179 Toutatis (1989 AC) from Thompsonville Obs. (Dec. 30.18-19p6)
03360 3360 Syrinx (1981 VA) from LINEAR (Dec. 29.13-18p5)
03200 3200 Phaethon (1983 TB) from Deep Sky Obs. (Dec. 28.80-82p6)
03122 3122 Florence (1981 ET3) from LINEAR (Dec. 29.38-43p5)
03102 3102 Krok (1981 QA) from Spacewatch 0.9m (Dec. 29.53-56p3)
02368 2368 Beltrovata (1977 RA) from Spacewatch 0.9m (Dec. 29.30-34p3)
01627 1627 Ivar (1929 SH) from CSS (Dec. 29.13-16p4) and Thompsonville Obs. (Dec. 30.16-17p6)
01221 1221 Amor (1932 EA1) from CSS (Dec. 29.20-22p4)

MPEC 2008-Y65 - "00:16 UT" - 2008 YO27

K08Y27O 2008 YO27 (i=38.6°, H=20.3 ~295m) was discovered at 0604 UT on 29 Dec. by LINEAR, which observed it at Dec. 29.25-30p4. The discovery was confirmed by Great Shefford Obs. (Dec. 29.99p3).

MPEC 2008-Y64 - "00:13 UT" - 2008 YN27

K08Y27N 2008 YN27 (H=21.5 ~170m) was discovered at 0511 UT on 29 Dec. by LINEAR, which observed it at Dec. 29.22-24p3. The discovery was confirmed by Great Shefford Obs. (Dec. 29.99p4).

Observers on 30 December '08

A total of 32 observing facilities appeared in this day's MPECs.

Code	Observer / observatory
`251`	Arecibo in Puerto Rico, 3 in radar -- 2008 UE7, 2004 XL14, 2004 LV3
`H55`	Astronomical Research Obs. (ARO) in Illinois, 18 in MPECs 2008-Y66 & 2008-Y68 -- 2008 YR27, 2008 YN2, 2008 YM2, 2008 YJ3, 2008 YG3, 2008 YC3, 2008 XB1, 2008 WZ94, 2008 WH60, 2008 WD14, 2008 UW5, 2008 TF4, 2008 SJ82, 2008 SH82, 2008 SE, 2008 SC85, 2008 MN1, 2000 QJ130
`703`	Catalina Sky Survey (CSS) in Arizona, 16 in MPECs 2008-Y66, 2008-Y69, 2008-Y72, 2008-Y73, 2008-Y75 & 2008-Y76 -- 2008 YS27, 2008 YF29, 2008 YE29, 2008 YC29, 2008 YB29, 2008 TN166, 2007 YZ, 2005 NJ1, 2003 YO1, 2001 FX9, 2000 OM, 22099, 16834, 14402, 1627, 1221
`807`	Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2008-Y74 -- 2006 UO321
`B60`	Deep Sky Obs. in Germany, 2 in MPEC 2008-Y66 -- 85236, 3200
`448`	Desert Moon Obs. in New Mexico, 4 in MPEC 2008-Y66 -- 2008 XN, 2004 KT, 2003 YX1, 2000 EW70
`113`	Drebach Obs. in Germany, 2 in MPECs 2008-Y70 & 2008-Y75 -- 2008 YZ28, 2008 YE29
`595`	Farra d'Isonzo Obs. in Italy, 2 in MPECs 2008-Y66 & 2008-Y76 -- 2008 YG26, 2008 YF29
`B23`	Fiamene Obs. in Italy, 4 in MPEC 2008-Y66 -- 2008 SQ1, 2008 RT26, 2008 MZ, 2005 TZ51
`J95`	Great Shefford Obs. in England, 7 in MPECs 2008-Y64, 2008-Y65, 2008-Y66, 2008-Y68, 2008-Y69 & 2008-Y78 -- 2008 YS27, 2008 YR27, 2008 YO27, 2008 YN27, 2008 YG26, 2008 YD29, 2008 XQ2
`A17`	Guidestar Obs. in Germany, 2 in MPECs 2008-Y68 & 2008-Y75 -- 2008 YR27, 2008 YE29
`379`	Hamamatsu-Yuto Obs. in Japan, 6 in MPEC 2008-Y66 -- 2008 YK2, 2008 WQ63, 2008 WL60, 2008 SH82, 2005 BC, 2004 LV3
`A35`	Hormersdorf Obs. in Germany, 1 in MPEC 2008-Y66 -- 2008 YK2
`695`	Kitt Peak Natl. Obs. (KPNO) in Arizona, 2 in MPEC 2008-Y74 -- 2006 UO321, 2004 XA192
`704`	LINEAR in New Mexico, 19 in MPECs 2008-Y64, 2008-Y65, 2008-Y66 & 2008-Y67 -- 2008 YQ27, 2008 YO27, 2008 YN27, 2008 XV2, 2007 YZ, 2003 XB22, 89355, 199801, 194386, 19356, 163014, 162361, 153814, 136849, 7358, 6569, 4183, 3360, 3122
`560`	Madonna di Dossobuono Obs. in Italy, 4 in MPEC 2008-Y66 -- 2008 WL60, 2008 VK14, 2008 SQ1, 2008 SH82
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 13 in MPECs 2008-Y66, 2008-Y67, 2008-Y68, 2008-Y69, 2008-Y70, 2008-Y71, 2008-Y72, 2008-Y73, 2008-Y75, 2008-Y76, 2008-Y77 & 2008-Y78 -- 2008 YZ28, 2008 YS27, 2008 YR27, 2008 YQ27, 2008 YG29, 2008 YF29, 2008 YE29, 2008 YD29, 2008 YC29, 2008 YB29, 2008 YA29, 2008 XU2, 2008 WY94
`B79`	Marana Obs., 2 in MPEC 2008-Y66 -- 2008 UE7, 137805
`B67`	Mirasteilas Obs. in Switzerland, 1 in MPEC 2008-Y66 -- 141052
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2008-Y66, 2008-Y68, 2008-Y69, 2008-Y70, 2008-Y71 & 2008-Y77 -- 2008 YZ28, 2008 YS27, 2008 YR27, 2008 YG29, 2008 YA29, 2008 XB1, 2008 TN166, 99935
`644`	NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2008-Y74 -- 2004 XA192
`A13`	Naef Obs. in Switzerland, 2 in MPECs 2008-Y66 & 2008-Y68 -- 2008 YR27, 2007 UY1
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 10 in MPEC 2008-Y66 -- 2008 YE3, 2008 XE2, 2008 WQ63, 2008 VU4, 2008 VK14, 2008 UC95, 2008 SQ1, 2008 SH82, 2008 EV5, 2005 BC
`H06%`	E. Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2008-Y75 -- 2008 YE29
`473`	Remanzacco Obs. in Italy, 1 in MPEC 2008-Y67 -- 2008 YQ27
`854`	Sabino Canyon Obs. in Arizona, 9 in MPECs 2008-Y67, 2008-Y68, 2008-Y69, 2008-Y70, 2008-Y72, 2008-Y73, 2008-Y75, 2008-Y76 & 2008-Y77 -- 2008 YZ28, 2008 YS27, 2008 YR27, 2008 YQ27, 2008 YG29, 2008 YF29, 2008 YE29, 2008 YC29, 2008 YB29
`H36`	Sandlot Obs. in Kansas, 3 in MPECs 2008-Y67, 2008-Y68 & 2008-Y78 -- 2008 YR27, 2008 YQ27, 2008 YD29
`E12`	Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2008-Y66 -- 2006 SZ217, 6053
`691`	Spacewatch 0.9m telescope in Arizona, 9 in MPECs 2008-Y66 & 2008-Y78 -- 2008 YD29, 96315, 186844, 18106, 159923, 153814, 153220, 3102, 2368
`291`	Spacewatch 1.8m telescope in Arizona, 13 in MPECs 2008-Y66, 2008-Y68, 2008-Y71 & 2008-Y78 -- 2008 YR27, 2008 YP2, 2008 YJ3, 2008 YD29, 2008 YA29, 2008 XO2, 2008 XM, 2008 WZ94, 2008 WZ13, 2008 WM64, 2005 VO5, 2003 YX1, 142348
`611`	Starkenburg Obs. in Germany, 2 in MPECs 2008-Y75 & 2008-Y76 -- 2008 YF29, 2008 YE29
`H53`	Thompsonville Obs. in Illinois, 6 in MPEC 2008-Y66 -- 2004 LV3, 194386, 162900, 8567, 4179, 1627

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

Impact Risk Monitoring on 30 December '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2259 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

2008 YF29	JPL Sentry	0001	2013-2108	163	2.0e-06	-5.06	-5.87	0	"Analysis based on 21 observations spanning .56969 days (2008-Dec-30.24924 to 2008-Dec-30.81893)." Diameter approximately 0.054 km. from mean, weighted H=24.0.

2008 YE29	JPL Sentry	0001	2014-2108	129	1.7e-07	-4.15	-5.14	0	"Analysis based on 23 observations spanning .62659 days (2008-Dec-30.22562 to 2008-Dec-30.85221)." Diameter approximately 0.340 km. from mean, weighted H=20.0.

2008 YB29	JPL Sentry	2210	2021-2101	9	1.0e-06	-6.55	-6.86	0	JPL: "Analysis based on 19 observations spanning .16832 days (2008-Dec-30.38794 to 2008-Dec-30.55626)." Diameter approximately 0.025 km. from mean, weighted H=25.7.

2008 YA29	JPL Sentry	2210	2027-2106	19	1.8e-08	-7.63	-8.43	0	JPL: "Analysis based on 16 observations spanning .12116 days (2008-Dec-30.29053 to 2008-Dec-30.41169)." Diameter approximately 0.040 km. from mean, weighted H=24.7.

2008 YC3	JPL Sentry	1529	2070-2107	26	2.0e-04	-4.34	-4.90	0	JPL: "Analysis based on 24 observations spanning 6.8814 days (2008-Dec-22.25277 to 2008-Dec-29.13413)." Diameter approximately 0.027 km. from mean, weighted H=25.5.
2008 YC3	NEODyS	1529	2085-2090	12	6.32e-05	-4.80	-5.26	0	NEODyS: "Based on 28 optical observations (of which 4 are rejected as outliers) from 2008/12/22.254 to 2008/12/29.135."

2008 XU2	JPL Sentry	1529	2039	1	3.5e-07	-6.57	-6.57	0	JPL: "Analysis based on 34 observations spanning 22.945 days (2008-Dec-06.2616 to 2008-Dec-29.20676)." Diameter approximately 0.026 km. from mean, weighted H=25.5.
2008 XU2	NEODyS	1529	2039	1	3.38e-07	-6.58	-6.58	0	NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2008/12/06.262 to 2008/12/29.208."

2008 WY94	JPL Sentry	1529	R E M O V E D						JPL: Risk listing removed at 0951 UTC.
2008 WY94	NEODyS	1529	R E M O V E D						-

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 30 December '08

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

2359	Noted that JPL Sentry has posted 2008 YE29 as an impact risk - see above Noted that JPL Sentry has posted 2008 YF29 as an impact risk - see above
2211	Grabbed MPEC 2008-Y74 - 2004 XA192, 2006 UO321 - see above Grabbed MPEC 2008-Y75 - 2008 YE29 - see above Grabbed MPEC 2008-Y76 - 2008 YF29 - see above Grabbed MPEC 2008-Y77 - 2008 YG29 - see above Grabbed MPEC 2008-Y78 - 2008 YD29 - see above
2210	Noted that JPL Sentry has posted 2008 YA29 as an impact risk - see above Noted that JPL Sentry has posted 2008 YB29 as an impact risk - see above Noted Radar Astrometry database update - see above
1959	Grabbed MPEC 2008-Y71 - 2008 YA29 - see above Grabbed MPEC 2008-Y72 - 2008 YB29 - see above Grabbed MPEC 2008-Y73 - 2008 YC29 - see above
1759	Grabbed MPEC 2008-Y70 - 2008 YZ28 - see above
1529	Noted that JPL Sentry has removed 2008 WY94 as an impact risk - see above Noted that NEODyS has removed 2008 WY94 as an impact risk - see above Noted that JPL Sentry has updated its 2008 XU2 risk assessment - see above Noted that NEODyS has reposted 2008 XU2 as an impact risk - see above Noted that JPL Sentry has updated its 2008 YC3 risk assessment - see above Noted that NEODyS has updated its 2008 YC3 risk assessment - see above Grabbed MPEC 2008-Y66 - Daily Orbit Update - see above Grabbed MPEC 2008-Y67 - 2008 YQ27 - see above Grabbed MPEC 2008-Y68 - 2008 YR27 - see above Grabbed MPEC 2008-Y69 - 2008 YS27 - see above
0028	Grabbed MPEC 2008-Y64 - 2008 YN27 - see above Grabbed MPEC 2008-Y65 - 2008 YO27 - see above

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