2008-10-09 Tracking News

Contents on 9 October '08

Radar Astrometry -- one object
IAU Minor Planet Center
- NEOCP Activity -- twelve listings: 1 new, 11 updated
- New MPECs -- ten MPECs
Observers -- 24 observing facilities
Impact Risk Monitoring -- eight 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 9 October '08

Radar observation of one object

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

Data addition noted at 2200 UTC when the database was dated 9 Oct.

164400 2005 GN59 from Goldstone DSS-14 70m antenna (Oct. 7.53 velocity, 9.53 velocity & 9.55 range) - see links

NEOCP Activity on 9 October '08

The MPC's NEO Confirmation Page has 12 listings: 1 new, 11 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and eleven updated listings. Of these, ten were "one nighters." So far The Tracking News has counted a total of 23 objects listed on the NEOCP at some point today.

New MPECs on 9 October '08

Minor Planet Electronic Circulars

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

MPEC 2008-T101 time-stamped "00:35 UT" - 2008 TN9 - see below
MPEC 2008-T102 time-stamped "04:26 UT" - 2008 TX9 - see below
MPEC 2008-T103 time-stamped "04:48 UT" - 2008 TY9 - see below
MPEC 2008-T104 time-stamped "06:10 UT" - Daily Orbit Update - see below
MPEC 2008-T105 time-stamped "16:24 UT" - 2008 TM10 - see below
MPEC 2008-T106 time-stamped "16:31 UT" - 2008 TO10 - see below
MPEC 2008-T107 time-stamped "16:35 UT" - 2008 TP10 - see below
MPEC 2008-T108 time-stamped "16:40 UT" - 2008 TQ10 - see below
MPEC 2008-T109 time-stamped "16:43 UT" - 2008 TR10 - see below
MPEC 2008-T110 time-stamped "16:47 UT" - 2008 TS10

MPEC 2008-T110 - "16:47 UT" - 2008 TS10

K08T10S 2008 TS10 (risk-listed, Earth MOID=1.1 LD, H=28.8 ~6m) was discovered at 0840 UT on 8 Oct. by the Mt. Lemmon Survey (MLS), which observed it at Oct. 8.36-41p8 at V=19.6-22.6 and 9.38-40p4 at V=21.2-22.5. The discovery was confirmed by Magdalena Ridge Obs. (MRO) (Oct. 9.47p3). This object is now within ten lunar distances (LD) of Earth, reaching 4.2 LD on 1 Oct.

MPEC 2008-T109 - "16:43 UT" - 2008 TR10

K08T10R 2008 TR10 (risk-listed, H=20.5 ~269m) was discovered at 0839 UT on 8 Oct. by MLS, which observed it at Oct. 8.36-41p12 and 9.33-34p4. The discovery was confirmed by Great Shefford Obs. (Oct. 9.01-02p2), Astronomical Research Obs. (ARO) (Oct. 9.20-21p3), MRO (Oct. 9.40-42p3), and the Spacewatch 1.8m telescope (Oct. 9.43-44p3).

MPEC 2008-T108 - "16:40 UT" - 2008 TQ10

K08T10Q 2008 TQ10 (H=20.6 ~257m) was discovered at 0838 UT on 8 Oct. by MLS, which observed it at Oct. 8.36-41p12 and 9.33-34p4. The discovery was confirmed by Great Shefford Obs. (Oct. 9.01-02p2), ARO (Oct. 9.16-18p3), MRO (Oct. 9.37-38p4), and Spacewatch 1.8m (Oct. 9.44-45p3).

MPEC 2008-T107 - "16:35 UT" - 2008 TP10

K08T10P 2008 TP10 (risk-listed, Earth MOID=2.4 LD, H=22.5 ~107m) was discovered at 0802 UT on 8 Oct. by MLS, which observed it at Oct. 8.34-39p8 at V=21.8-22.8 and 9.40-41p4 at V=21.6-22.4. The discovery was confirmed by MRO (Oct. 8.48-49p2 & 9.39-41p3) and ARO (Oct. 9.24-27p3 at V=22.2-3).

MPEC 2008-T106 - "16:31 UT" - 2008 TO10

K08T10O 2008 TO10 (Q=4.676 AU, H=19.0 ~537m) was discovered at 0653 UT on 8 Oct. by LINEAR, which observed it at Oct. 8.29-33p4. The discovery was confirmed by Great Shefford Obs. (Oct. 9.11-12p3), Sabino Canyon Obs. (Oct. 9.27p2), Jim Young via Table Mtn. Obs. (Oct. 9.28-30p2 & 9.45-46p2), ARO (Oct. 9.31-32p2), and Sandlot Obs. (Oct. 9.35-37p4).

MPEC 2008-T105 - "16:24 UT" - 2008 TM10

K08T10M 2008 TM10 (H=19.3 ~467m) was discovered at 0246 UT on 8 Oct. by LINEAR, which observed it at Oct. 8.12-14p3. The discovery was confirmed by MLS (Oct. 9.16-18p8) and Moriyama Obs. (Oct. 9.44-46p4).

<< DOU on 9 Oct. '08 >> MPEC 2008-T104 - "06:10 UT" - Daily Orbit Update

Observations of risk-listed objects
K08T04C 2008 TC4 (q=0.357 AU, arc=1 day, H=21.2 ~195m) from LINEAR (Oct. 8.28-33p5)
K08T03Z 2008 TZ3 (arc=2 days, H=20.2 ~309m) from Spacewatch 1.8m (Oct. 8.47-48p3)
K08S82H 2008 SH82 (arc=12 days, H=21.1 ~204m) from Spacewatch 1.8m (Oct. 8.09-11p3)
K08S07T 2008 ST7 (small asteroid, arc=14 days, H=24.1 ~51m) from ARO (Sept. 29.28-30p3) and Spacewatch 1.8m (Oct. 8.45-46p3)
K08S00T 2008 ST (small asteroid, arc=7 days, H=27.1 ~13m) from ARO (Sept. 25.04-05p3)
Observations of recently (no longer) risk-listed objects
K08S82J 2008 SJ82 (arc=12 days, H=20.8 ~234m) from the Siding Spring Survey (SSS) (Oct. 8.74p1)
K08S11V 2008 SV11 (Q=4.506 AU, arc=13 days, H=18.2 ~776m) from MLS (Oct. 8.16-17p4)
K08S00R 2008 SR (almost small, arc=12 days, H=21.8 ~148m) from ARO (Sept. 25.34-35p2)
K08S00O 2008 SO (arc=17 days, H=20.9 ~224m) from ARO (Sept. 25.27-28p3), the Catalina Sky Survey (CSS) (Oct. 8.28-30p4), and Spacewatch 1.8m (Oct. 8.35-36p3)
Observations of small asteroids (H>22.0)
K08T04E 2008 TE4 (arc=1 day, H=23.9 ~56m) from LINEAR (Oct. 8.16-20p4)
K08T04A 2008 TA4 (arc=2 days, H=24.9 ~35m) from SSS (Oct. 8.60p2)
K08T00Z 2008 TZ (arc=6 days, H=25.4 ~28m) from CSS (Oct. 8.25-27p3)
K08T00G 2008 TG (arc=7 days, H=23.1 ~81m) from Spacewatch 1.8m (Oct. 8.37-38p3)
K08T00A 2008 TA (arc=7 days, H=23.7 ~62m) from MLS (Oct. 8.18-20p4)
K08S01T 2008 ST1 (arc=4 days, H=27.2 ~12m) from ARO (Sept. 25.37-38p3)
K08Q11W 2008 QW11 (arc=42 days, H=23.3 ~74m) from ARO (Sept. 29.35-41p5)
Observations of almost-small asteroids (21.7<H<=22.0)
K08S01W 2008 SW1 (arc=13 days, H=21.8 ~148m) from ARO (Sept. 29.28-29p3)
Observations of other objects
K08T04F 2008 TF4 (arc=2 days, H=18.9 ~562m) from LINEAR (Oct. 8.28-33p5)
K08T04D 2008 TD4 (arc=1 day, H=19.6 ~407m) from LINEAR (Oct. 8.22-27p5)
K08T01A 2008 TA1 (arc=6 days, H=18.6 ~645m) from CSS (Oct. 8.35-38p4)
K08S85C 2008 SC85 (arc=11 days, H=19.3 ~467m) from Desert Moon Obs. (Oct. 8.15-20p3)
K08S11W 2008 SW11 (arc=13 days, H=21.2 ~195m) from the Spacewatch 0.9m telescope (Oct. 8.28-32p3)
K08S07V 2008 SV7 (arc=12 days, H=21.6 ~162m) from ARO (Sept. 29.32-33p3)
K08S07Q 2008 SQ7 (arc=13 days, H=19.7 ~389m) from ARO (Sept. 29.37p2)
K08S07P 2008 SP7 (Q=4.198 AU, arc=16 days, H=19.0 ~537m) from ARO (Sept. 29.30-31p4), MLS (Oct. 7.38-40p3), and Mirasteilas Obs. (Oct. 9.03-05p3)
K08S01R 2008 SR1 (arc=15 days, H=20.4 ~282m) from SSS (Oct. 8.62-66p4)
K08S01Q 2008 SQ1 (Q=4.682 AU, arc=2 opp, H=18.2 ~776m) from Capannoli Obs. (Oct. 8.87-88p2)
K08S01O 2008 SO1 (Q=4.707 AU, arc=3 days, H=19.4 ~446m) from ARO (Sept. 25.43-44p3)
K08S00Q 2008 SQ (arc=16 days, H=19.5 ~426m) from ARO (Sept. 29.31-32p3)
K08S00E 2008 SE (arc=19 days, H=19.2 ~490m) from ARO (Sept. 29.31-32p3), Hamamatsu-Yuto Obs. (Oct. 8.58-62p5), Mirasteilas Obs. (Oct. 8.91-93p3), and Capannoli Obs. (Oct. 8.99-00p2)
K08R98G 2008 RG98 (arc=29 days, H=17.2 ~1.23 km) from Spacewatch 1.8m (Oct. 8.34p3)
K08R26T 2008 RT26 (arc=26 days, H=19.3 ~467m) from ARO (Sept. 29.39-41p3)
K08R24Z 2008 RZ24 (arc=31 days, H=20.1 ~323m) from ARO (Sept. 23.38-40p3) and Desert Moon Obs. (Oct. 8.40-46p3)
K08R24Y 2008 RY24 (arc=3 opp, H=17.8 ~933m) from ARO (Sept. 25.06-07p4)
K08R24R 2008 RR24 (arc=26 days, H=21.2 ~195m) from ARO (Sept. 23.09-10p3)
K08R24Q 2008 RQ24 (arc=32 days, H=20.7 ~245m) from Spacewatch 0.9m (Oct. 7.22-25p3)
K08R00T 2008 RT (arc=32 days, H=19.7 ~389m) from ARO (Sept. 29.42-43p4)
K08Q11S 2008 QS11 (arc=42 days, H=19.9 ~355m) from CSS (Oct. 8.49-51p4) and MLS (Oct. 8.52p4)
K08Q03U 2008 QU3 (arc=34 days, H=20.5 ~269m) from ARO (Sept. 23.07-08p3)
K08Q00Y 2008 QY (arc=2 opp, H=18.6 ~645m) from ARO (Sept. 22.37-38p3)
K08Q00C 2008 QC (arc=50 days, H=20.6 ~257m) from CSS (Oct. 8.28-30p4) and Spacewatch 1.8m (Oct. 8.35-36p3)
K08P03L 2008 PL3 (arc=65 days, H=19.3 ~467m) from MLS (Oct. 8.14-15p4)
K08O08X 2008 OX8 (arc=65 days, H=21.6 ~162m) from ARO (Sept. 22.18-20p2)
K08N00U 2008 NU (Q=4.202 AU, arc=98 days, H=17.6 ~1.02 km) from CSS (Oct. 6.24-26p4)
K08M01R 2008 MR1 (arc=3 opp, H=18.4 ~708m) from LINEAR (Oct. 8.29-34p5)
K08J07Z 2008 JZ7 (Q=4.382 AU, arc=155 days, H=18.6 ~645m) from ARO (Sept. 23.18p1) and CSS (Oct. 7.14-16p4)
K08H03O 2008 HO3 (Q=4.800 AU, arc=162 days, H=18.0 ~851m) from Desert Moon Obs. (Oct. 8.08-11p2)
K08D05J 2008 DJ5 (arc=2 opp, H=19.9 ~355m) from MLS (Oct. 8.46-48p4)
K05T51Z 2005 TZ51 (arc=3 opp, H=17.9 ~891m) from CSS (Oct. 7.13-15p4) and LINEAR (Oct. 8.22-27p5)
K05T15R 2005 TR15 (arc=2 opp, H=18.6 ~645m) from MLS (Oct. 8.23-25p4)
K05B02E 2005 BE2 (arc=3 opp, H=18.3 ~741m) from ARO (Sept. 23.41p1)
K04S56B 2004 SB56 (arc=2 opp, H=19.2 ~490m) from LINEAR (Oct. 8.12-14p3)
K03G00W 2003 GW (i=49.4°, arc=3 opp, H=16.8 ~1.48 km) from Hamamatsu-Yuto Obs. (Oct. 1.49-50p4, 8.46-47p2 & 8.55p1)
K02S41S 2002 SS41 (i=63.7°, arc=3 opp, H=17.3 ~1.17 km) from CSS (Oct. 8.24-27p4)
K01V76B 2001 VB76 (arc=3 opp, H=20.4 ~282m) from ARO (Sept. 25.29-31p2 at V=22.0-22.1)
K01SR6G 2001 SG276 (arc=4 opp, H=17.7 ~977m) from CSS (Oct. 7.41-43p4)
K01S10G 2001 SG10 (arc=5 opp, H=20.3 ~295m) from Spacewatch 0.9m (Oct. 8.44-48p3)
K01C42K 2001 CK42 (arc=4 opp, H=20.0 ~339m) from Spacewatch 0.9m (Oct. 7.27-31p3)
K00F01L 2000 FL1 (i=43.6°, Q=4.178 AU, arc=2 opp, H=15.3 ~2.95 km, q=1.291 AU) from Desert Moon Obs. (Oct. 8.49-51p5)
J98S70J 1998 SJ70 (arc=3 opp, H=18.4 ~708m) from CSS (Oct. 8.32-34p4)
J0208 190208 2006 AQ from David Tholen's team on Mauna Kea (Sept. 16.38p2)
J0119 190119 2004 VA64 from LINEAR (Oct. 8.29-34p5)
I5851 185851 2000 DP107 from Taurus-1 Obs. (Oct. 7.85-86p6), Raheny Obs. (Oct. 8.92p2 & 8.98p2), and Mt. Tuffley Obs. (Oct. 8.96-97p3)
G8044 168044 2005 SG from LINEAR (Oct. 8.36-46p9)
G4400 164400 2005 GN59 from Urseanu Obs. (Oct. 3.86p3)
G2900 162900 2001 HG31 from CSS (Oct. 7.41-43p4)
G2215 162215 1999 TL12 from Spacewatch 0.9m (Oct. 8.16-20p3) and Spacewatch 1.8m (Oct. 8.37p3)
F3306 153306 2001 JL1 from CSS (Oct. 6.45-47p4) and Mirasteilas Obs. (Oct. 8.98-00p3)
E4901 144901 2004 WG1 from CSS (Oct. 8.39-41p4)
E1851 141851 2002 PM6 from CSS (Oct. 7.13-15p4) and LINEAR (Oct. 8.21-27p4)
E0288 140288 2001 SN289 from MLS (Oct. 8.16-17p4)
D7799 137799 1999 YB from CSS (Oct. 7.41-43p4)
D7032 137032 1998 UO1 from Urseanu Obs. (Oct. 3.92-93p4), Taurus-1 Obs. (Oct. 7.91-92p7), LINEAR (Oct. 8.21-27p5), and Raheny Obs. (Oct. 8.95-96p5)
18882 18882 1999 YN4 from LINEAR (Oct. 8.42-47p4)
17511 17511 1992 QN from LINEAR (Oct. 8.41-46p4)
16960 16960 1998 QS52 from Taurus-1 Obs. (Oct. 7.97-98p6), North Obs. (Oct. 8.90-91p4), and Mt. Tuffley Obs. (Oct. 8.94-95p3)
11405 11405 1999 CV3 from SSS (Oct. 8.68-72p3)
08567 8567 1996 HW1 from Mt. Tuffley Obs. (Oct. 8.92p3)
07358 7358 Oze (1995 YA3) from Mirasteilas Obs. (Oct. 9.01-02p3)
07335 7335 1989 JA from Mirasteilas Obs. (Oct. 9.09-11p3)
04183 4183 Cuno (1959 LM) from CSS (Oct. 6.36-38p4 & 7.35-37p4) and MLS (Oct. 8.31-32p4)
04179 4179 Toutatis (1989 AC) from Hamamatsu-Yuto Obs. (Oct. 8.39-43p5)
01980 1980 Tezcatlipoca (1950 LA) from MLS (Oct. 8.11-12p4)
01865 1865 Cerberus (1971 UA) from CSS (Oct. 6.38-40p4)
01627 1627 Ivar (1929 SH) from Mt. Tuffley Obs. (Oct. 8.93p3)
01620 1620 Geographos (1951 RA) from Taurus-1 Obs. (Oct. 7.83-84p6) and Mt. Tuffley Obs. (Oct. 8.91p3)

MPEC 2008-T103 - "04:48 UT" - 2008 TY9

K08T09Y 2008 TY9 (small asteroid, H=25.0 ~34m) was discovered at 0518 UT on 8 Oct. by LINEAR, which observed it at Oct. 8.22-27p4. The discovery was confirmed by Great Shefford Obs. (Oct. 9.09-10p5) and Sabino Canyon Obs. (Oct. 9.17p3).

MPEC 2008-T102 - "04:26 UT" - 2008 TX9

K08T09X 2008 TX9 (small asteroid, Earth MOID=6.6 LD, H=26.3 ~19m) was discovered at 0838 UT on 8 Oct. by MLS, which observed it at Oct. 8.36-41p7. The discovery was confirmed by MRO (Oct. 8.45-46p3) and Great Shefford Obs. (Oct. 9.04-05p2).

MPEC 2008-T101 - "00:35 UT" - 2008 TN9

K08T09N 2008 TN9 (small asteroid, Earth MOID=0.6 LD, H=27.8 ~9m) was discovered at 0646 UT on 8 Oct. by MLS, which observed it at Oct. 8.28-30p4 and 8.36-37p4. The discovery was confirmed by MRO (Oct. 8.41-42p4) and Great Shefford Obs. (Oct. 8.96-98p3). This object was within ten lunar distances (LD) of Earth, reaching 1.0 LD on 4 Oct.

Observers on 9 October '08

A total of 24 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 28 in MPECs 2008-T104, 2008-T106, 2008-T107, 2008-T108 & 2008-T109 -- 2008 TR10, 2008 TQ10, 2008 TP10, 2008 TO10, 2008 SW1, 2008 SV7, 2008 ST7, 2008 ST1, 2008 ST, 2008 SR, 2008 SQ7, 2008 SQ, 2008 SP7, 2008 SO1, 2008 SO, 2008 SE, 2008 RZ24, 2008 RY24, 2008 RT26, 2008 RT, 2008 RR24, 2008 QY, 2008 QW11, 2008 QU3, 2008 OX8, 2008 JZ7, 2005 BE2, 2001 VB76
`B09`	Capannoli Obs. in Italy, 2 in MPEC 2008-T104 -- 2008 SQ1, 2008 SE
`703`	Catalina Sky Survey (CSS) in Arizona, 18 in MPEC 2008-T104 -- 2008 TZ, 2008 TA1, 2008 SO, 2008 QS11, 2008 QC, 2008 NU, 2008 JZ7, 2005 TZ51, 2002 SS41, 2001 SG276, 1998 SJ70, 162900, 153306, 144901, 141851, 137799, 4183, 1865
`448`	Desert Moon Obs. in New Mexico, 4 in MPEC 2008-T104 -- 2008 SC85, 2008 RZ24, 2008 HO3, 2000 FL1
`253`	Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 164400
`J95`	Great Shefford Obs. in England, 6 in MPECs 2008-T101, 2008-T102, 2008-T103, 2008-T106, 2008-T108 & 2008-T109 -- 2008 TY9, 2008 TX9, 2008 TR10, 2008 TQ10, 2008 TO10, 2008 TN9
`379`	Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2008-T104 -- 2008 SE, 2003 GW, 4179
`704`	LINEAR in New Mexico, 16 in MPECs 2008-T103, 2008-T104, 2008-T105 & 2008-T106 -- 2008 TY9, 2008 TO10, 2008 TM10, 2008 TF4, 2008 TE4, 2008 TD4, 2008 TC4, 2008 MR1, 2005 TZ51, 2004 SB56, 190119, 18882, 17511, 168044, 141851, 137032
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPECs 2008-T101, 2008-T102, 2008-T107, 2008-T108, 2008-T109 & 2008-T110 -- 2008 TX9, 2008 TS10, 2008 TR10, 2008 TQ10, 2008 TP10, 2008 TN9
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-T104 -- 190208
`B67`	Mirasteilas Obs. in Switzerland, 5 in MPEC 2008-T104 -- 2008 SP7, 2008 SE, 153306, 7358, 7335
`900`	Moriyama Obs. in Japan, 1 in MPEC 2008-T105 -- 2008 TM10
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 17 in MPECs 2008-T101, 2008-T102, 2008-T104, 2008-T105, 2008-T107, 2008-T108, 2008-T109 & 2008-T110 -- 2008 TX9, 2008 TS10, 2008 TR10, 2008 TQ10, 2008 TP10, 2008 TN9, 2008 TM10, 2008 TA, 2008 SV11, 2008 SP7, 2008 QS11, 2008 PL3, 2008 DJ5, 2005 TR15, 140288, 4183, 1980
`J93`	Mt. Tuffley Obs. in England, 5 in MPEC 2008-T104 -- 185851, 16960, 8567, 1627, 1620
`J69`	North Obs. in England, 1 in MPEC 2008-T104 -- 16960
`J41`	Raheny Obs. in Ireland, 2 in MPEC 2008-T104 -- 185851, 137032
`854`	Sabino Canyon Obs. in Arizona, 2 in MPECs 2008-T103 & 2008-T106 -- 2008 TY9, 2008 TO10
`H36`	Sandlot Obs. in Kansas, 1 in MPEC 2008-T106 -- 2008 TO10
`E12`	Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2008-T104 -- 2008 TA4, 2008 SR1, 2008 SJ82, 11405
`691`	Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2008-T104 -- 2008 SW11, 2008 RQ24, 2001 SG10, 2001 CK42, 162215
`291`	Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2008-T104, 2008-T108 & 2008-T109 -- 2008 TZ3, 2008 TR10, 2008 TQ10, 2008 TG, 2008 ST7, 2008 SO, 2008 SH82, 2008 RG98, 2008 QC, 162215
`6735`	Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-T106 -- 2008 TO10
`A98`	Taurus-1 Obs. in Belarus, 4 in MPEC 2008-T104 -- 185851, 16960, 137032, 1620
`A92`	Urseanu Obs. in Romania, 2 in MPEC 2008-T104 -- 164400, 137032

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

Impact Risk Monitoring on 9 October '08

**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

2008 TS10	JPL Sentry	2045	2040-2103	54	2.1e-05	-6.88	-7.58	0	JPL: "Analysis based on 15 observations spanning 1.1091 days (2008-Oct-08.36174 to 2008-Oct-09.47079)." Diameter approximately 0.006 km. from mean, weighted H=28.7.

2008 TR10	JPL Sentry	2045	2015-2097	35	1.7e-08	-5.36	-6.13	0	JPL: "Analysis based on 27 observations spanning 1.0788 days (2008-Oct-08.36066 to 2008-Oct-09.43949)." Diameter approximately 0.270 km. from mean, weighted H=20.5.

2008 TP10	JPL Sentry	2045	2085-2093	2	3.0e-10	-8.24	-8.45	0	JPL: "Analysis based on 20 observations spanning 1.0747 days (2008-Oct-08.33519 to 2008-Oct-09.40987)." Diameter approximately 0.116 km. from mean, weighted H=22.3.

2008 TC4	JPL Sentry	1454	R E M O V E D						JPL: Risk listing removed at 1112 UTC.

2008 TZ3	JPL Sentry	1454	2012-2108	101	1.4e-06	-2.85	-3.34	0	JPL: "Analysis based on 18 observations spanning 2.1431 days (2008-Oct-06.33267 to 2008-Oct-08.47578)." Diameter approximately 0.305 km. from mean, weighted H=20.2.
2008 TZ3	NEODyS	1454	2012-2089	18	5.28e-07	-3.11	-3.52	0	NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2008/10/06.333 to 2008/10/08.477."

2008 SH82	JPL Sentry	1454	2081	1	1.8e-07	-5.09	-5.09	0	JPL: "Analysis based on 44 observations spanning 11.893 days (2008-Sep-26.21299 to 2008-Oct-08.1063)." Diameter approximately 0.210 km. from mean, weighted H=21.0.
2008 SH82	NEODyS	1454	2081	1	1.35e-07	-5.25	-5.25	0	NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2008/09/26.214 to 2008/10/08.107."

2008 ST7	JPL Sentry	1454	2073-2108	38	4.8e-05	-4.22	-4.62	0	JPL: "Analysis based on 91 observations spanning 14.161 days (2008-Sep-24.29993 to 2008-Oct-08.46109)." Diameter approximately 0.051 km. from mean, weighted H=24.1.
2008 ST7	NEODyS	1454	2062-2089	12	1.84e-06	-5.47	-5.76	0	NEODyS: "Based on 97 optical observations (of which 6 are rejected as outliers) from 2008/09/24.301 to 2008/10/08.462."

2008 ST	JPL Sentry	1454	2047	1	1.0e-08	-9.11	-9.11	0	JPL: "Analysis based on 44 observations spanning 7.1120 days (2008-Sep-22.16113 to 2008-Sep-29.27316)." Diameter approximately 0.013 km. from mean, weighted H=27.1.

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 October '08

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

2200	Noted Radar Astrometry database addition - see above
2045	Noted that JPL Sentry has posted 2008 TP10 as an impact risk - see above Noted that JPL Sentry has posted 2008 TR10 as an impact risk - see above Noted that JPL Sentry has posted 2008 TS10 as an impact risk - see above
1701	Grabbed MPEC 2008-T105 - 2008 TM10 - see above Grabbed MPEC 2008-T106 - 2008 TO10 - see above Grabbed MPEC 2008-T107 - 2008 TP10 - see above Grabbed MPEC 2008-T108 - 2008 TQ10 - see above Grabbed MPEC 2008-T109 - 2008 TR10 - see above Grabbed MPEC 2008-T110 - 2008 TS10 - see above
1454	Noted that JPL Sentry has updated its 2008 SH82 risk assessment - see above Noted that NEODyS has updated its 2008 SH82 risk assessment - see above Noted that JPL Sentry has updated its 2008 ST risk assessment - see above Noted that JPL Sentry has updated its 2008 ST7 risk assessment - see above Noted that NEODyS has updated its 2008 ST7 risk assessment - see above Noted that JPL Sentry has removed 2008 TC4 as an impact risk - see above Noted that JPL Sentry has updated its 2008 TZ3 risk assessment - see above Noted that NEODyS has updated its 2008 TZ3 risk assessment - see above Grabbed MPEC 2008-T104 - Daily Orbit Update - see above
0520	Grabbed MPEC 2008-T103 - 2008 TY9 - see above
0431	Grabbed MPEC 2008-T102 - 2008 TX9 - see above
0058	Grabbed MPEC 2008-T101 - 2008 TN9 - see above

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