2008-10-07 Tracking News

SpaceWeather.com is reporting from the University of Western Ontario that a Kenyan infrasound array picked up a 1.1- to 2.1-kiloton explosion over northeastern Africa at 0243 UTC today. JPL reported yesterday that "an atmospheric impact" was very likely to occur over northern Sudan by newly discovered tiny asteroid 2008 TC3 (see discovery MPEC yesterday). This A/CC graphic shows 2008 TC3 two and three-quarter hours before the event in a geocentric view, although, due its closeness to Earth, 2008 TC3's place in the sky would have appeared very differently depending on ones actual geographic location. We have news links here.

Contents on 7 October '08

IAU Minor Planet Center
- NEOCP Activity -- two listings: 2 updated
- New MPECs -- eighteen MPECs
Observers -- 35 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
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 7 October '08

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

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

New MPECs on 7 October '08

Minor Planet Electronic Circulars

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

MPEC 2008-T69 time-stamped "00:00 UT" - 2008 TC3 - see below
MPEC 2008-T70 time-stamped "00:28 UT" - 2008 TC3 - see below
MPEC 2008-T71 time-stamped "01:09 UT" - 2008 TC3 - see below
MPEC 2008-T72 time-stamped "01:23 UT" - 2008 TC3 - see below
MPEC 2008-T73 time-stamped "01:44 UT" - 2008 TC3 - see below
MPEC 2008-T74 time-stamped "02:00 UT" - 2008 TC3 - see below
MPEC 2008-T75 time-stamped "06:10 UT" - Daily Orbit Update - see below
MPEC 2008-T76 time-stamped "12:39 UT" - 2004 TU11 - see below
MPEC 2008-T77 time-stamped "21:35 UT" - 2008 TX3 - see below
MPEC 2008-T78 time-stamped "21:38 UT" - 2008 TY3 - see below
MPEC 2008-T79 time-stamped "21:46 UT" - 2008 TZ3 - see below
MPEC 2008-T80 time-stamped "21:50 UT" - 2008 TA4 - see below
MPEC 2008-T81 time-stamped "21:54 UT" - 2008 TB4 - see below
MPEC 2008-T82 time-stamped "21:57 UT" - 2008 TC4 - see below
MPEC 2008-T83 time-stamped "21:59 UT" - 2008 TD4 - see below
MPEC 2008-T84 time-stamped "22:12 UT" - 2008 SO218 - see below
MPEC 2008-T85 time-stamped "22:22 UT" - 2008 TE4 - see below
MPEC 2008-T86 time-stamped "22:24 UT" - 2008 TF4

MPEC 2008-T86 - "22:24 UT" - 2008 TF4

K08T04F 2008 TF4 (H=18.9 ~562m) was discovered at 0640 UT on 7 Oct. by LINEAR, which observed it at Oct. 7.28-33p5. The discovery was confirmed by Great Shefford Obs. (Oct. 7.91p3).

MPEC 2008-T85 - "22:22 UT" - 2008 TE4

K08T04E 2008 TE4 (small asteroid, Earth MOID=6.0 LD, H=23.9 ~56m) was discovered at 0508 UT on 7 Oct. by LINEAR, which observed it at Oct. 7.21-26p5. The discovery was confirmed by the Catalina Sky Survey (CSS) (Oct. 7.14-15p2) and Great Shefford Obs. (Oct. 7.86-90p4).

MPEC 2008-T84 - "22:12 UT" - 2008 SO218

K08SL8O 2008 SO218 (i=170.3°, q=3.535 AU, Q=12.108 AU, H=12.7 ~9.77 km) was discovered at 1021 UT on 30 Sept. by the Mt. Lemmon Survey (MLS), which observed it at Sept. 30.43-45p4, Oct. 1.44-45p4, and 3.36-37p4. The discovery was confirmed by Astronomical Research Obs. (ARO) (Oct. 1.34-35p3, 4.40-41p3 & 6.41p1), LINEAR (Oct. 1.35-39p3), Cordell-Lorenz Obs. (Oct. 1.36-39p3, 2.42-43p3 & 4.40-43p3), Junk Bond Obs. (Oct. 1.43-50p4), Dave Balam via Plaskett 1.8m Telescope (Oct. 1.45-46p3), Jim Young via Table Mtn. Obs. (Oct. 1.48-49p4, 6.44-46p4 & 7.49-51p4), CSS (Oct. 1.49-50p4), Tiki Obs. (Oct. 1.59-61p2), Sandlot Obs. (Oct. 2.41-42p3 & 3.45p3), Desert Moon Obs. (Oct. 2.45-47p3), the Spacewatch 1.8m telescope (Oct. 3.46-47p3 & 7.51-52p3), Mt. John Obs. (Oct. 5.62p3), Vallemare di Borbona Obs. (Oct. 6.03-05p6), Schiaparelli Obs. (Oct. 6.04p1 & 6.13p1), and Magdalena Ridge Obs. (MRO) (Oct. 7.50-51p4).

MPEC 2008-T83 - "21:59 UT" - 2008 TD4

K08T04D 2008 TD4 (H=19.6 ~407m) was discovered at 0654 UT on 7 Oct. by CSS, which observed it at Oct. 7.29-33p7. The discovery was confirmed by Sabino Canyon Obs. (Oct. 7.34-35p3), Young/Table Mtn. (Oct. 7.39-41p4), Engelhardt Obs. Zelenchukskaya Station (Oct. 7.68-69p5), and Great Shefford Obs. (Oct. 7.83-84p3).

MPEC 2008-T82 - "21:57 UT" - 2008 TC4

K08T04C 2008 TC4 (q=0.349 AU, Earth MOID=2.0 LD, H=21.1 ~204m) was discovered at 0639 UT on 7 Oct. by LINEAR, which observed it at Oct. 7.28-33p5. The discovery was confirmed by Great Shefford Obs. (Oct. 7.84-85p3).

MPEC 2008-T81 - "21:54 UT" - 2008 TB4

K08T04B 2008 TB4 (i=41.7°, H=20.9 ~224m) was discovered at 0348 UT on 7 Oct. by CSS, which observed it at Oct. 7.16-17p3 and 7.22p4. The discovery was confirmed by Sabino Canyon Obs. (Oct. 7.25p4) and Great Shefford Obs. (Oct. 7.81-82p3).

MPEC 2008-T80 - "21:50 UT" - 2008 TA4

K08T04A 2008 TA4 (small asteroid, Earth MOID=4.9 LD, H=24.8 ~37m) was discovered at 1603 UT on 6 Oct. by the Siding Spring Survey (SSS), which observed it at Oct. 6.67-70p4, 6.76-77p2, and 7.65-68p3. This object will be coming within ten lunar distances (LD) of Earth, reaching 7.0 LD on 11 Oct.

MPEC 2008-T79 - "21:46 UT" - 2008 TZ3

K08T03Z 2008 TZ3 (H=20.5 ~269m) was discovered at 0759 UT on 6 Oct. by MLS, which observed it at Oct. 6.33-37p4, 6.42-46p4, and 7.30-33p4. The discovery was confirmed by Spacewatch 1.8m (Oct. 7.33-34p3).

MPEC 2008-T78 - "21:38 UT" - 2008 TY3

K08T03Y 2008 TY3 (small asteroid, H=24.1 ~51m) was discovered at 0748 UT on 6 Oct. by MLS, which observed it at Oct. 6.33-36p4, 6.42-46p4, and 7.30-32p4. The discovery was confirmed by Spacewatch 1.8m (Oct. 7.31-32p3) and Young/Table Mtn. (Oct. 7.32-35p4).

MPEC 2008-T77 - "21:35 UT" - 2008 TX3

K08T03X 2008 TX3 (small asteroid, Earth MOID=8.8 LD, H=24.9 ~35m) was discovered at 0605 UT on 6 Oct. by the Spacewatch 0.9m telescope, which observed it at Oct. 6.25-29p3. The discovery was confirmed by Sabino Canyon Obs. (Oct. 6.36-37p3), Young/Table Mtn. (Oct. 6.37-39p4 & 7.36-38p4), and Spacewatch 1.8m (Oct. 7.21-22p3). This object will be coming within ten lunar distances (LD) of Earth, reaching 10.0 LD on 31 Oct.

MPEC 2008-T76 - "12:39 UT" - 2004 TU11

K04T11U 2004 TU11 (H=21.2 ~195m) from Spacewatch 0.9m (Sept. 23.40-44p3 & Oct. 6.42-46p3), Spacewatch 1.8m (Oct. 7.23-24p3), Sabino Canyon Obs. (Oct. 7.35-37p3), and Young/Table Mtn. (Oct. 7.45-47p4)

<< DOU on 7 Oct. '08 >> MPEC 2008-T75 - "06:10 UT" - Daily Orbit Update

Observations of risk-listed objects
K08T03C 2008 TC3 (small asteroid, arc=1 day, H=30.4 ~3m) from McCarthy Obs. (Oct. 7.01-02p4) and Remanzacco Obs. (Oct. 7.02p1)
K08T02D 2008 TD2 (arc=3 days, H=21.4 ~178m) from ARO (Oct. 6.36-38p2)
K08T02C 2008 TC2 (small asteroid, arc=3 days, H=22.9 ~89m) from ARO (Oct. 6.33-35p3)
K08S82H 2008 SH82 (arc=10 days, H=21.1 ~204m) from ARO (Oct. 6.06-08p3)
K08S07T 2008 ST7 (small asteroid, arc=12 days, H=24.1 ~51m) from ARO (Oct. 6.24-27p3) and Spacewatch 1.8m (Oct. 6.42-44p3)
Observations of recently (no longer) risk-listed objects
K08S01U 2008 SU1 (arc=13 days, H=19.0 ~537m) from LINEAR (Oct. 6.24-26p3)
K08S00O 2008 SO (arc=15 days, H=20.8 ~234m) from ARO (Oct. 6.17-18p3)
K08R01J 2008 RJ1 (arc=32 days, H=17.8 ~933m) from Spacewatch 1.8m (Oct. 6.40-41p3)
K08R01H 2008 RH1 (small asteroid, arc=32 days, H=22.6 ~102m) from Spacewatch 1.8m (Oct. 6.38-39p3)
Observations of small asteroids (H>22.0)
K08T02B 2008 TB2 (arc=3 days, H=24.6 ~41m) from ARO (Oct. 6.24p4)
K08T00Z 2008 TZ (arc=4 days, H=25.4 ~28m) from ARO (Oct. 6.14p4) and Faulkes Telescope South (Oct. 6.59-60p15)
K08T00A 2008 TA (arc=5 days, H=23.7 ~62m) from ARO (Oct. 6.08-11p3)
K08SF0Z 2008 SZ150 (arc=6 days, H=23.8 ~59m) from Schiaparelli Obs. (Oct. 5.98-99p3) and ARO (Oct. 6.19-20p4)
K08SF0Y 2008 SY150 (arc=6 days, H=24.5 ~43m) from ARO (Oct. 6.07-08p3)
K08S85D 2008 SD85 (arc=8 days, H=23.2 ~78m) from ARO (Oct. 6.09-11p3)
K08S08F 2008 SF8 (Q=4.479 AU, arc=11 days, H=23.7 ~62m) from ARO (Oct. 6.12-13p3)
K08R01K 2008 RK1 (Q=4.379 AU, arc=32 days, H=22.2 ~123m) from Spacewatch 1.8m (Oct. 6.45-48p3)
K08R01E 2008 RE1 (arc=34 days, H=23.0 ~85m) from ARO (Oct. 6.27-29p4) and LINEAR (Oct. 6.28-33p5)
Observations of almost-small asteroids (21.7<H<=22.0)
K08T00F 2008 TF (arc=5 days, H=21.8 ~148m) from ARO (Oct. 6.06p4)
Observations of other objects
K08T02R 2008 TR2 (arc=1 day, H=19.7 ~389m) from ARO (Oct. 6.32-33p3)
K08S07V 2008 SV7 (arc=12 days, H=21.5 ~170m) from ARO (Oct. 6.32-34p3)
K08S07Q 2008 SQ7 (arc=13 days, H=19.7 ~389m) from ARO (Oct. 6.37-38p3)
K08S07P 2008 SP7 (Q=4.202 AU, arc=13 days, H=19.0 ~537m) from ARO (Oct. 6.31-32p3)
K08S01W 2008 SW1 (arc=13 days, H=21.7 ~155m) from ARO (Oct. 6.29-30p3)
K08S01R 2008 SR1 (arc=13 days, H=20.4 ~282m) from ARO (Oct. 6.17-19p5)
K08S01Q 2008 SQ1 (Q=4.682 AU, arc=2 opp, H=18.2 ~776m) from LINEAR (Oct. 6.22-27p5)
K08S01N 2008 SN1 (Q=4.024 AU, arc=16 days, H=19.6 ~407m) from CSS (Oct. 6.41-44p4)
K08S00Q 2008 SQ (arc=15 days, H=19.5 ~426m) from Schiaparelli Obs. (Oct. 4.01p1 & 4.07-10p2), Crni Vrh Obs. (Oct. 5.95-98p4), and ARO (Oct. 6.30-31p5)
K08S00E 2008 SE (arc=16 days, H=19.2 ~490m) from LINEAR (Oct. 6.28-33p4) and ARO (Oct. 6.29-30p4)
K08R24Y 2008 RY24 (arc=3 opp, H=17.8 ~933m) from ARO (Oct. 6.03-05p3)
K08R24Q 2008 RQ24 (arc=31 days, H=20.7 ~245m) from ARO (Oct. 6.22-23p3)
K08R00T 2008 RT (arc=32 days, H=19.7 ~389m) from Ametlla del Valles Obs. (Oct. 4.03-05p3)
K08Q11S 2008 QS11 (arc=38 days, H=19.9 ~355m) from Ametlla del Valles Obs. (Oct. 4.04-05p6) and Schiaparelli Obs. (Oct. 4.13p5)
K08Q03T 2008 QT3 (arc=42 days, H=18.5 ~676m) from ARO (Oct. 6.03-05p3)
K08Q00Z 2008 QZ (arc=45 days, H=20.4 ~282m) from ARO (Oct. 6.25-26p5)
K08Q00Y 2008 QY (arc=2 opp, H=18.6 ~645m) from Ametlla del Valles Obs. (Oct. 4.06p2)
K08Q00C 2008 QC (arc=47 days, H=20.6 ~257m) from ARO (Oct. 6.21-23p4)
K08M00Z 2008 MZ (Q=4.207 AU, arc=111 days, H=18.5 ~676m) from Schiaparelli Obs. (Oct. 4.13-14p3)
K06S19U 2006 SU19 (arc=3 opp, H=19.1 ~513m) from Spacewatch 0.9m (Oct. 6.21-25p3)
K06G00Z 2006 GZ (arc=2 opp, H=19.4 ~446m) from LINEAR (Oct. 6.35-38p4)
K04T19L 2004 TL19 (arc=2 opp, H=20.7 ~245m) from CSS (Oct. 6.27-28p3)
K03U03L 2003 UL3 (Q=4.035 AU, arc=3 opp, H=18.0 ~851m) from David Tholen's team on Mauna Kea (Aug. 13.44-46p3 at R=22.9-23.3 & Sept. 16.35-37p11 at R=23.3)
K03G00W 2003 GW (i=49.4°, arc=3 opp, H=16.8 ~1.48 km) from CSS (Oct. 6.16-18p3)
K02S41S 2002 SS41 (i=63.7°, arc=3 opp, H=17.2 ~1.23 km) from MLS (Oct. 6.28-31p3)
K01U16Z 2001 UZ16 (arc=3 opp, H=19.5 ~426m) from Ametlla del Valles Obs. (Oct. 6.83-84p3)
J94A01W 1994 AW1 (arc=3 opp, H=17.5 ~1.07 km) from CSS (Oct. 6.14-15p4)
J0491 190491 2000 FJ10 from Schiaparelli Obs. (Oct. 4.01p1 & 4.07-10p2)
J0135 190135 2005 QE30 from Schiaparelli Obs. (Oct. 5.98-02p3) and El Guijo Obs. (Oct. 6.89-90p2)
I9700 189700 2001 TA45 from CSS (Oct. 6.21-23p4)
I5851 185851 2000 DP107 from Schiaparelli Obs. (Oct. 4.01p1 & 4.07-10p2) and LINEAR (Oct. 6.28-33p10)
G2900 162900 2001 HG31 from Schiaparelli Obs. (Oct. 4.01p1 & 4.09-11p2)
G2215 162215 1999 TL12 from Spacewatch 0.9m (Oct. 6.16-19p3)
D8947 138947 2001 BA40 from Ametlla del Valles Obs. (Oct. 6.83-85p5)
D7032 137032 1998 UO1 from Schiaparelli Obs. (Oct. 5.98-02p3)
96744 96744 1999 OW3 from MLS (Oct. 6.38-41p4)
85774 85774 1998 UT18 from CSS (Oct. 6.48-50p4)
85770 85770 1998 UP1 from LINEAR (Oct. 6.34-38p4)
39572 39572 1993 DQ1 from CSS (Oct. 6.16-18p4)
07358 7358 Oze (1995 YA3) from Ametlla del Valles Obs. (Oct. 4.13p3)
05332 5332 1990 DA from SSS (Oct. 6.70-74p4)
03200 3200 Phaethon (1983 TB) from Ametlla del Valles Obs. (Oct. 4.06-07p2 & 4.12p1)
02212 2212 Hephaistos (1978 SB) from LINEAR (Oct. 6.34-39p5) and CSS (Oct. 6.45-47p4)
02201 2201 Oljato (1947 XC) from Ametlla del Valles Obs. (Oct. 4.12-13p3)
01916 1916 Boreas (1953 RA) from Ametlla del Valles Obs. (Oct. 4.06-08p4)
01620 1620 Geographos (1951 RA) from El Guijo Obs. (Oct. 6.93-94p3)

MPEC 2008-T74 - "02:00 UT" - 2008 TC3

K08T03C 2008 TC3 (risk-listed, Earth MOID=0.0 LD, H=30.4 ~3m) from Remanzacco Obs. (Oct. 7.05-06p7) This object is now within ten lunar distances (LD) of Earth, reaching 0.0 LD on 7 Oct. (INTRUDER).

MPEC 2008-T73 - "01:44 UT" - 2008 TC3

K08T03C 2008 TC3 (risk-listed, Earth MOID=0.0 LD, H=30.4 ~3m) from La Sagra Obs. (Oct. 7.04p11) and Chante-Perdrix Obs. (Oct. 7.06p7) This object is now within ten lunar distances (LD) of Earth, reaching 0.0 LD on 7 Oct. (INTRUDER).

MPEC 2008-T72 - "01:23 UT" - 2008 TC3

K08T03C 2008 TC3 (risk-listed, Earth MOID=0.0 LD, H=30.4 ~3m) from Posadas Obs. (Oct. 7.03p5), Remanzacco Obs. (Oct. 7.03-04p5), Chante-Perdrix Obs. (Oct. 7.04p8), and Starkenburg Obs. (Oct. 7.04p1) This object is now within ten lunar distances (LD) of Earth, reaching 0.0 LD on 7 Oct. (INTRUDER).

MPEC 2008-T71 - "01:09 UT" - 2008 TC3

K08T03C 2008 TC3 (risk-listed, Earth MOID=0.0 LD, H=30.4 ~3m) from Remanzacco Obs. (Oct. 6.99-02p11), Posadas Obs. (Oct. 7.00-01p4), La Sagra Obs. (Oct. 7.01-03p13), Albigneux Obs. (Oct. 7.02-03p5), and Chante-Perdrix Obs. (Oct. 7.03p8) This object is now within ten lunar distances (LD) of Earth, reaching 0.0 LD on 7 Oct. (INTRUDER).

MPEC 2008-T70 - "00:28 UT" - 2008 TC3

K08T03C 2008 TC3 (risk-listed, Earth MOID=0.0 LD, H=30.4 ~3m) from Great Shefford Obs. (Oct. 6.99p1), Nazaret Obs. (Oct. 6.99p5), La Sagra Obs. (Oct. 6.99-01p13), Montcabre Obs. (Oct. 7.00-01p4), Albigneux Obs. (Oct. 7.00-01p5), and Chante-Perdrix Obs. (Oct. 7.00-01p9) This object is now within ten lunar distances (LD) of Earth, reaching 0.0 LD on 7 Oct. (INTRUDER).

MPEC 2008-T69 - "00:00 UT" - 2008 TC3

K08T03C 2008 TC3 (risk-listed, Earth MOID=0.0 LD, H=30.4 ~3m) from Great Shefford Obs. (Oct. 6.96-98p6), Zelenchukskaya Sta. (Oct. 6.97p4), Remanzacco Obs. (Oct. 6.97-98p3), Nazaret Obs. (Oct. 6.98-99p17), Montcabre Obs. (Oct. 6.98-99p5), Chante-Perdrix Obs. (Oct. 6.99p11), and Albigneux Obs. (Oct. 6.99p3) This object is now within ten lunar distances (LD) of Earth, reaching 0.0 LD on 7 Oct. (INTRUDER).

Observers on 7 October '08

A total of 35 observing facilities appear in today's MPECs.

Code	Observer / observatory
`A86`	Albigneux Obs. in France, 1 in MPECs 2008-T69, 2008-T70 & 2008-T71 -- 2008 TC3
`B37`	Ametlla del Valles Obs. in Spain, 9 in MPEC 2008-T75 -- 2008 RT, 2008 QY, 2008 QS11, 2001 UZ16, 138947, 7358, 3200, 2201, 1916
`H55`	Astronomical Research Obs. (ARO) in Illinois, 28 in MPECs 2008-T75 & 2008-T84 -- 2008 TZ, 2008 TR2, 2008 TF, 2008 TD2, 2008 TC2, 2008 TB2, 2008 TA, 2008 SZ150, 2008 SY150, 2008 SW1, 2008 SV7, 2008 ST7, 2008 SR1, 2008 SQ7, 2008 SQ, 2008 SP7, 2008 SO218, 2008 SO, 2008 SH82, 2008 SF8, 2008 SE, 2008 SD85, 2008 RY24, 2008 RQ24, 2008 RE1, 2008 QZ, 2008 QT3, 2008 QC
`703`	Catalina Sky Survey (CSS) in Arizona, 12 in MPECs 2008-T75, 2008-T81, 2008-T83, 2008-T84 & 2008-T85 -- 2008 TE4, 2008 TD4, 2008 TB4, 2008 SO218, 2008 SN1, 2004 TL19, 2003 GW, 1994 AW1, 85774, 39572, 189700, 2212
`A77`	Chante-Perdrix Obs. in France, 1 in MPECs 2008-T69, 2008-T70, 2008-T71, 2008-T72 & 2008-T73 -- 2008 TC3
`850`	Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2008-T84 -- 2008 SO218
`106`	Crni Vrh Obs. in Slovenia, 1 in MPEC 2008-T75 -- 2008 SQ
`448`	Desert Moon Obs. in New Mexico, 1 in MPEC 2008-T84 -- 2008 SO218
`J27`	El Guijo Obs. in Spain, 2 in MPEC 2008-T75 -- 190135, 1620
`114`	Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 2 in MPECs 2008-T69 & 2008-T83 -- 2008 TD4, 2008 TC3
`E10`	Faulkes Telescope South in New South Wales, 1 in MPEC 2008-T75 -- 2008 TZ
`J95`	Great Shefford Obs. in England, 6 in MPECs 2008-T69, 2008-T70, 2008-T81, 2008-T82, 2008-T83, 2008-T85 & 2008-T86 -- 2008 TF4, 2008 TE4, 2008 TD4, 2008 TC4, 2008 TC3, 2008 TB4
`701`	Junk Bond Obs. in Arizona, 1 in MPEC 2008-T84 -- 2008 SO218
`704`	LINEAR in New Mexico, 12 in MPECs 2008-T75, 2008-T82, 2008-T84, 2008-T85 & 2008-T86 -- 2008 TF4, 2008 TE4, 2008 TC4, 2008 SU1, 2008 SQ1, 2008 SO218, 2008 SE, 2008 RE1, 2006 GZ, 85770, 185851, 2212
`J75`	La Sagra Obs. in Spain, 1 in MPECs 2008-T70, 2008-T71 & 2008-T73 -- 2008 TC3
`H01`	Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2008-T84 -- 2008 SO218
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-T75 -- 2003 UL3
`932`	McCarthy Obs. in Connecticut, 1 in MPEC 2008-T75 -- 2008 TC3
`213`	Montcabre Obs. in Spain, 1 in MPECs 2008-T69 & 2008-T70 -- 2008 TC3
`474`	Mt. John Obs. in New Zealand, 1 in MPEC 2008-T84 -- 2008 SO218
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2008-T75, 2008-T78, 2008-T79 & 2008-T84 -- 2008 TZ3, 2008 TY3, 2008 SO218, 2002 SS41, 96744
`J47`	Nazaret Obs. in Spain, 1 in MPECs 2008-T69 & 2008-T70 -- 2008 TC3
`6581`	Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2008-T84 -- 2008 SO218
`J53`	Posadas Obs. in Spain, 1 in MPECs 2008-T71 & 2008-T72 -- 2008 TC3
`473`	Remanzacco Obs. in Italy, 1 in MPECs 2008-T69, 2008-T71, 2008-T72, 2008-T74 & 2008-T75 -- 2008 TC3
`854`	Sabino Canyon Obs. in Arizona, 4 in MPECs 2008-T76, 2008-T77, 2008-T81 & 2008-T83 -- 2008 TX3, 2008 TD4, 2008 TB4, 2004 TU11
`H36`	Sandlot Obs. in Kansas, 1 in MPEC 2008-T84 -- 2008 SO218
`204`	Schiaparelli Obs. in Italy, 10 in MPECs 2008-T75 & 2008-T84 -- 2008 SZ150, 2008 SQ, 2008 SO218, 2008 QS11, 2008 MZ, 190491, 190135, 185851, 162900, 137032
`E12`	Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2008-T75 & 2008-T80 -- 2008 TA4, 5332
`691`	Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2008-T75, 2008-T76 & 2008-T77 -- 2008 TX3, 2006 SU19, 2004 TU11, 162215
`291`	Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2008-T75, 2008-T76, 2008-T77, 2008-T78, 2008-T79 & 2008-T84 -- 2008 TZ3, 2008 TY3, 2008 TX3, 2008 ST7, 2008 SO218, 2008 RK1, 2008 RJ1, 2008 RH1, 2004 TU11
`611`	Starkenburg Obs. in Germany, 1 in MPEC 2008-T72 -- 2008 TC3
`6735`	Jim Young via Table Mtn. Obs. in southern California, 5 in MPECs 2008-T76, 2008-T77, 2008-T78, 2008-T83 & 2008-T84 -- 2008 TY3, 2008 TX3, 2008 TD4, 2008 SO218, 2004 TU11
`F85`	Tiki Obs. in Tahiti, 1 in MPEC 2008-T84 -- 2008 SO218
`A55`	Vallemare di Borbona Obs. in Italy, 1 in MPEC 2008-T84 -- 2008 SO218

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

Impact Risk Monitoring on 7 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 TD2	JPL Sentry	1455	R E M O V E D						JPL: Risk listing removed at 0852 UTC.
2008 TD2	NEODyS	1455	R E M O V E D						-

2008 TC2	JPL Sentry	1455	R E M O V E D						JPL: Risk listing removed at 0855 UTC.
2008 TC2	NEODyS	1455	R E M O V E D						-

2008 SH82	JPL Sentry	1455	2043-2081	2	6.6e-07	-4.52	-4.52	0	JPL: "Analysis based on 41 observations spanning 9.8636 days (2008-Sep-26.21299 to 2008-Oct-06.0766)." Diameter approximately 0.210 km. from mean, weighted H=21.0.
2008 SH82	NEODyS	1455	2043-2081	2	5.99e-07	-4.60	-4.60	0	NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2008/09/26.214 to 2008/10/06.077."

2008 ST7	JPL Sentry	1455	2073-2107	39	4.6e-05	-4.22	-4.71	0	JPL: "Analysis based on 75 observations spanning 12.145 days (2008-Sep-24.29993 to 2008-Oct-06.44473)." Diameter approximately 0.051 km. from mean, weighted H=24.1.
2008 ST7	NEODyS	1455	2073-2089	7	2.47e-06	-5.34	-5.65	0	NEODyS: "Based on 81 optical observations (of which 6 are rejected as outliers) from 2008/09/24.301 to 2008/10/06.445."

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 7 October '08

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

2305	Grabbed MPEC 2008-T77 - 2008 TX3 - see above Grabbed MPEC 2008-T78 - 2008 TY3 - see above Grabbed MPEC 2008-T79 - 2008 TZ3 - see above Grabbed MPEC 2008-T80 - 2008 TA4 - see above Grabbed MPEC 2008-T81 - 2008 TB4 - see above Grabbed MPEC 2008-T82 - 2008 TC4 - see above Grabbed MPEC 2008-T83 - 2008 TD4 - see above Grabbed MPEC 2008-T84 - 2008 SO218 - see above Grabbed MPEC 2008-T85 - 2008 TE4 - see above Grabbed MPEC 2008-T86 - 2008 TF4 - see above
1455	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 ST7 risk assessment - see above Noted that NEODyS has updated its 2008 ST7 risk assessment - see above Noted that JPL Sentry has removed 2008 TC2 as an impact risk - see above Noted that NEODyS has removed 2008 TC2 as an impact risk - see above Noted that JPL Sentry has removed 2008 TD2 as an impact risk - see above Noted that NEODyS has removed 2008 TD2 as an impact risk - see above Grabbed MPEC 2008-T75 - Daily Orbit Update - see above Grabbed MPEC 2008-T76 - 2004 TU11 - see above
0213	Grabbed MPEC 2008-T73 - 2008 TC3 - see above Grabbed MPEC 2008-T74 - 2008 TC3 - see above
0144	Grabbed MPEC 2008-T71 - 2008 TC3 - see above Grabbed MPEC 2008-T72 - 2008 TC3 - see above
0058	Grabbed MPEC 2008-T70 - 2008 TC3 - see above
0026	Grabbed MPEC 2008-T69 - 2008 TC3 - see above

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