2008-10-04 Tracking News

Contents on 4 October '08

IAU Minor Planet Center
- NEOCP Activity -- seven listings: 2 new, 5 updated
- New MPECs -- seven MPECs
Observers -- 22 observing facilities
Impact Risk Monitoring -- five 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 4 October '08

The MPC's NEO Confirmation Page has 7 listings: 2 new, 5 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new and five updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of seventeen 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 4 October '08

Minor Planet Electronic Circulars

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

MPEC 2008-T38 time-stamped "06:09 UT" - Daily Orbit Update - see below
MPEC 2008-T39 time-stamped "15:59 UT" - 2006 HD2 - see below
MPEC 2008-T40 time-stamped "21:35 UT" - 2008 TB2 - see below
MPEC 2008-T41 time-stamped "21:37 UT" - 2008 TC2 - see below
MPEC 2008-T42 time-stamped "21:40 UT" - 2008 TD2 - see below
MPEC 2008-T43 time-stamped "21:42 UT" - 2008 TE2 - see below
MPEC 2008-T44 time-stamped "21:45 UT" - 2008 TF2

MPEC 2008-T44 - "21:45 UT" - 2008 TF2

K08T02F 2008 TF2 (small asteroid, Earth MOID=4.3 LD, H=25.1 ~32m) was discovered at 0318 UT on 4 Oct. by the Mt. Lemmon Survey (MLS), which observed it at Oct. 4.14-15p4, 4.25p4, and 4.37-38p4. The discovery was confirmed by Astronomical Research Obs. (ARO) (Oct. 4.25p2).

MPEC 2008-T43 - "21:42 UT" - 2008 TE2

K08T02E 2008 TE2 (small asteroid, Earth MOID=3.4 LD, H=27.3 ~12m) was discovered at 1114 UT on 3 Oct. by MLS, which observed it at Oct. 3.47-49p7 and 4.45p4. The discovery was confirmed by Great Shefford Obs. (Oct. 3.99p2). This object is now within ten lunar distances (LD) of Earth, reaching 5.0 LD on 1 Oct.

MPEC 2008-T42 - "21:40 UT" - 2008 TD2

K08T02D 2008 TD2 (H=21.4 ~178m) was discovered at 0928 UT on 3 Oct. by MLS, which observed it at Oct. 3.39-46p7 and 4.46-48p8. The discovery was confirmed by ARO (Oct. 4.42-43p3).

MPEC 2008-T41 - "21:37 UT" - 2008 TC2

K08T02C 2008 TC2 (small asteroid, Earth MOID=7.2 LD, H=22.7 ~98m) was discovered at 0839 UT on 3 Oct. by MLS, which observed it at Oct. 3.36-41p8 and 4.43-44p4. The discovery was confirmed by ARO (Oct. 4.38-39p3).

MPEC 2008-T40 - "21:35 UT" - 2008 TB2

K08T02B 2008 TB2 (small asteroid, H=24.6 ~41m) was discovered at 0601 UT on 3 Oct. by MLS, which observed it at Oct. 3.25-30p8, 3.35p4, and 4.25p4. The discovery was confirmed by Sandlot Obs. (Oct. 3.33-34p3), ARO (Oct. 3.34-35p4 & 4.16-17p3), Sabino Canyon Obs. (Oct. 3.38-39p3), Magdalena Ridge Obs. (MRO) (Oct. 3.40-41p5), Great Shefford Obs. (Oct. 3.89-92p5), Schiaparelli Obs. (Oct. 3.94p3), and Remanzacco Obs. (Oct. 4.81-82p2).

MPEC 2008-T39 - "15:59 UT" - 2006 HD2

K06H02D 2006 HD2 (H=20.9 ~224m) from MLS (Oct. 3.42-48p8 & 4.44-45p4)

<< DOU on 4 Oct. '08 >> MPEC 2008-T38 - "06:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K08T00E 2008 TE (small asteroid, arc=2 days, H=27.7 ~10m) from the Spacewatch 1.8m telescope (Oct. 3.24-25p3 at V=22.1)
K08S85E 2008 SE85 (arc=5 days, H=19.8 ~371m) from ARO (Oct. 3.30-31p4) and Spacewatch 1.8m (Oct. 3.39-40p3)
K08S82H 2008 SH82 (arc=7 days, H=21.1 ~204m) from ARO (Oct. 3.07-09p3) and Spacewatch 1.8m (Oct. 3.33-34p2)
K08S11V 2008 SV11 (Q=4.508 AU, arc=8 days, H=18.2 ~776m) from MRO (Oct. 3.34-35p3)
K08S07T 2008 ST7 (small asteroid, arc=9 days, H=24.1 ~51m) from ARO (Oct. 3.27-29p3) and Spacewatch 1.8m (Oct. 3.27-28p3)
Observations of recently (no longer) risk-listed objects
K08S00R 2008 SR (almost small, arc=12 days, H=21.8 ~148m) from ARO (Oct. 3.32-35p3)
K08S00O 2008 SO (arc=12 days, H=20.8 ~234m) from Spacewatch 1.8m (Oct. 3.42-43p3)
Observations of small asteroids (H>22.0)
K08T01E 2008 TE1 (arc=2 days, H=25.4 ~28m) from LINEAR (Oct. 3.27-32p5), ARO (Oct. 3.29-30p4), and Great Shefford Obs. (Oct. 3.85p1 & 3.96p2)
K08T01B 2008 TB1 (Q=4.368 AU, arc=1 day, H=22.2 ~123m) from ARO (Oct. 3.14-17p3 at V=21.8-22.1)
K08T00L 2008 TL (arc=2 days, H=27.5 ~11m) from Spacewatch 1.8m (Oct. 3.31-32p2)
K08T00C 2008 TC (arc=2 days, H=23.6 ~65m) from ARO (Oct. 3.10-12p3)
K08SF0Z 2008 SZ150 (arc=3 days, H=23.8 ~59m) from Dresden Obs. (Oct. 2.91-93p4)
K08S85D 2008 SD85 (arc=5 days, H=23.1 ~81m) from Spacewatch 1.8m (Oct. 3.18p3)
K08S00P 2008 SP (arc=12 days, H=23.2 ~78m) from Spacewatch 1.8m (Oct. 3.34-35p3)
K08R01K 2008 RK1 (Q=4.377 AU, arc=29 days, H=22.2 ~123m) from Spacewatch 1.8m (Oct. 3.41-42p3)
K08R01E 2008 RE1 (arc=31 days, H=23.0 ~85m) from LINEAR (Oct. 3.28-32p4)
K06T00D 2006 TD (arc=2 opp, H=22.4 ~112m) from the Siding Spring Survey (SSS) (Oct. 3.48-49p4 & 3.59-60p2)
Observations of other objects
K08S11W 2008 SW11 (arc=8 days, H=21.2 ~195m) from Spacewatch 1.8m (Oct. 3.29p3)
K08S07V 2008 SV7 (arc=9 days, H=21.4 ~178m) from ARO (Oct. 3.37-38p3)
K08S07Q 2008 SQ7 (arc=10 days, H=19.7 ~389m) from ARO (Oct. 3.39p3)
K08S01W 2008 SW1 (arc=10 days, H=21.7 ~155m) from ARO (Oct. 3.35-37p5)
K08S01R 2008 SR1 (arc=10 days, H=20.4 ~282m) from SSS (Oct. 3.52-55p2)
K08S01Q 2008 SQ1 (Q=4.682 AU, arc=2 opp, H=18.2 ~776m) from La Fecha Obs. (Oct. 4.07-09p2)
K08S01N 2008 SN1 (Q=4.027 AU, arc=13 days, H=19.6 ~407m) from ARO (Oct. 3.37-39p3)
K08S00Q 2008 SQ (arc=13 days, H=19.5 ~426m) from Rodeo Obs. (Sept. 22.40p3) and La Fecha Obs. (Oct. 4.11-15p3)
K08S00E 2008 SE (arc=13 days, H=19.1 ~513m) from Geisei Obs. (Sept. 27.66p3) and LINEAR (Oct. 3.27-32p5)
K08S00D 2008 SD (arc=14 days, H=19.4 ~446m) from SSS (Oct. 3.55-58p2)
K08R98G 2008 RG98 (arc=24 days, H=17.2 ~1.23 km) from Spacewatch 1.8m (Oct. 3.43-44p3)
K08R26T 2008 RT26 (arc=26 days, H=19.3 ~467m) from ARO (Oct. 3.40-41p3)
K08R00T 2008 RT (arc=32 days, H=19.7 ~389m) from ARO (Oct. 3.41-42p3)
K08Q00C 2008 QC (arc=45 days, H=20.6 ~257m) from ARO (Oct. 3.27-29p4)
K08O08X 2008 OX8 (arc=65 days, H=21.6 ~162m) from Spacewatch 1.8m (Oct. 3.12-13p3)
K08M01H 2008 MH1 (Q=4.263 AU, arc=97 days, H=18.5 ~676m) from ARO (Oct. 3.06-07p3)
K08M00Z 2008 MZ (Q=4.207 AU, arc=110 days, H=18.5 ~676m) from ARO (Oct. 3.42-43p3)
K08L16N 2008 LN16 (arc=115 days, H=19.9 ~355m) from Desert Moon Obs. (Oct. 3.15-22p3)
K08J07Z 2008 JZ7 (Q=4.382 AU, arc=148 days, H=18.6 ~645m) from program code 8 via Faulkes Telescope North (Sept. 29.28p2)
K06W02Z 2006 WZ2 (arc=3 opp, H=16.9 ~1.41 km) from La Fecha Obs. (Oct. 3.93-95p2)
K06SL7Z 2006 SZ217 (arc=3 opp, H=17.4 ~1.12 km) from La Fecha Obs. (Oct. 3.97-01p3)
K05S25N 2005 SN25 (arc=3 opp, H=19.8 ~371m) from Spacewatch 1.8m (Oct. 3.48p3 at V=22.5)
K03G00W 2003 GW (i=49.4°, arc=3 opp, H=16.8 ~1.48 km) from Dresden Obs. (Oct. 2.89-90p5)
K03F06Q 2003 FQ6 (arc=3 opp, H=20.8 ~234m) from the Catalina Sky Survey (CSS) (Oct. 2.28-30p4)
K01SH0D 2001 SD170 (arc=4 opp, H=18.1 ~812m) from Spacewatch 1.8m (Oct. 3.49-50p3)
K01S10G 2001 SG10 (arc=5 opp, H=20.3 ~295m) from the Spacewatch 0.9m telescope (Oct. 3.43-47p3)
G4400 164400 2005 GN59 from North Obs. (Oct. 3.85-87p5) and La Fecha Obs. (Oct. 3.88-90p3)
G2215 162215 1999 TL12 from CSS (Oct. 2.35-37p4)
F5140 155140 2005 UD from LINEAR (Oct. 3.28-33p5)
D8947 138947 2001 BA40 from Inastars Obs. (Oct. 3.75-76p8)
90403 90403 2003 YE45 from LINEAR (Oct. 3.15-20p5)
90075 90075 2002 VU94 from LINEAR (Oct. 3.33-38p5)
86829 86829 2000 GR146 from SSS (Oct. 3.71-73p4)
85770 85770 1998 UP1 from LINEAR (Oct. 3.34-39p5)
12538 12538 1998 OH from LINEAR (Oct. 3.22-27p5)
11398 11398 1998 YP11 from SSS (Oct. 3.49-51p4)
07888 7888 1993 UC from CSS (Oct. 2.24-27p4)
05131 5131 1990 BG from SSS (Oct. 3.65-69p4)
04183 4183 Cuno (1959 LM) from LINEAR (Oct. 3.28-32p5)
04179 4179 Toutatis (1989 AC) from Tucci Obs. (Sept. 30.91-92p3)
01865 1865 Cerberus (1971 UA) from LINEAR (Oct. 3.28-33p5)

Observers on 4 October '08

A total of 22 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 20 in MPECs 2008-T38, 2008-T40, 2008-T41, 2008-T42 & 2008-T44 -- 2008 TF2, 2008 TE1, 2008 TD2, 2008 TC2, 2008 TC, 2008 TB2, 2008 TB1, 2008 SW1, 2008 SV7, 2008 ST7, 2008 SR, 2008 SQ7, 2008 SN1, 2008 SH82, 2008 SE85, 2008 RT26, 2008 RT, 2008 QC, 2008 MZ, 2008 MH1
`703`	Catalina Sky Survey (CSS) in Arizona, 3 in MPEC 2008-T38 -- 2003 FQ6, 162215, 7888
`448`	Desert Moon Obs. in New Mexico, 1 in MPEC 2008-T38 -- 2008 LN16
`639`	Dresden Obs. in Germany, 2 in MPEC 2008-T38 -- 2008 SZ150, 2003 GW
`F658`	program code 8 via Faulkes Telescope North in Hawaii, 1 in MPEC 2008-T38 -- 2008 JZ7
`372`	Geisei Obs. in Japan, 1 in MPEC 2008-T38 -- 2008 SE
`J95`	Great Shefford Obs. in England, 3 in MPECs 2008-T38, 2008-T40 & 2008-T43 -- 2008 TE2, 2008 TE1, 2008 TB2
`B15`	Inastars Obs. in Germany, 1 in MPEC 2008-T38 -- 138947
`704`	LINEAR in New Mexico, 10 in MPEC 2008-T38 -- 2008 TE1, 2008 SE, 2008 RE1, 90403, 90075, 85770, 155140, 12538, 4183, 1865
`J34`	La Fecha Obs. in Spain, 5 in MPEC 2008-T38 -- 2008 SQ1, 2008 SQ, 2006 WZ2, 2006 SZ217, 164400
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2008-T38 & 2008-T40 -- 2008 TB2, 2008 SV11
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2008-T39, 2008-T40, 2008-T41, 2008-T42, 2008-T43 & 2008-T44 -- 2008 TF2, 2008 TE2, 2008 TD2, 2008 TC2, 2008 TB2, 2006 HD2
`J69`	North Obs. in England, 1 in MPEC 2008-T38 -- 164400
`473`	Remanzacco Obs. in Italy, 1 in MPEC 2008-T40 -- 2008 TB2
`H11`	Rodeo Obs., 1 in MPEC 2008-T38 -- 2008 SQ
`854`	Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-T40 -- 2008 TB2
`H36`	Sandlot Obs. in Kansas, 1 in MPEC 2008-T40 -- 2008 TB2
`204`	Schiaparelli Obs. in Italy, 1 in MPEC 2008-T40 -- 2008 TB2
`E12`	Siding Spring Survey (SSS) in New South Wales, 6 in MPEC 2008-T38 -- 2008 SR1, 2008 SD, 2006 TD, 86829, 11398, 5131
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-T38 -- 2001 SG10
`291`	Spacewatch 1.8m telescope in Arizona, 14 in MPEC 2008-T38 -- 2008 TL, 2008 TE, 2008 SW11, 2008 ST7, 2008 SP, 2008 SO, 2008 SH82, 2008 SE85, 2008 SD85, 2008 RK1, 2008 RG98, 2008 OX8, 2005 SN25, 2001 SD170
`J35`	Tucci Obs. in Spain, 1 in MPEC 2008-T38 -- 4179

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

Impact Risk Monitoring on 4 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 TE	NEODyS	1457	2023-2090	9	4.21e-05	-5.13	-5.13	0	NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2008/10/01.248 to 2008/10/03.247."
2008 TE	JPL Sentry	1456	2023-2047	3	4.4e-05	-5.12	-5.12	0	JPL: "Analysis based on 32 observations spanning 1.9987 days (2008-Oct-01.24709 to 2008-Oct-03.24577)." Diameter approximately 0.010 km. from mean, weighted H=27.7.

2008 SE85	JPL Sentry	1456	R E M O V E D						JPL: Risk listing removed at 0852 UTC.
2008 SE85	NEODyS	1456	R E M O V E D						-

2008 SH82	NEODyS	1457	2043-2081	4	7.32e-07	-4.45	-4.63	0	NEODyS: "Based on 35 optical observations (of which 0 are rejected as outliers) from 2008/09/26.214 to 2008/10/03.338."
2008 SH82	JPL Sentry	1456	2043-2081	4	8.3e-07	-4.34	-4.57	0	JPL: "Analysis based on 35 observations spanning 7.1247 days (2008-Sep-26.21299 to 2008-Oct-03.33769)." Diameter approximately 0.210 km. from mean, weighted H=21.1.

2008 SV11	NEODyS	1457	2072	1	2.04e-10	-6.37	-6.37	0	NEODyS: "Based on 78 optical observations (of which 0 are rejected as outliers) from 2008/09/25.263 to 2008/10/03.348."
2008 SV11	JPL Sentry	1456	2059-2084	5	3.5e-09	-5.16	-5.27	0	JPL: "Analysis based on 78 observations spanning 8.0851 days (2008-Sep-25.26245 to 2008-Oct-03.34757)." Diameter approximately 0.748 km. from mean, weighted H=18.3.

2008 ST7	NEODyS	1457	2068-2089	11	4.21e-06	-5.10	-5.43	0	NEODyS: "Based on 69 optical observations (of which 6 are rejected as outliers) from 2008/09/24.301 to 2008/10/03.287."
2008 ST7	JPL Sentry	1456	2073-2108	40	3.9e-05	-4.26	-4.88	0	JPL: "Analysis based on 63 observations spanning 8.9859 days (2008-Sep-24.29993 to 2008-Oct-03.28586)." Diameter approximately 0.052 km. from mean, weighted H=24.1.

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 4 October '08

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

2152	Grabbed MPEC 2008-T40 - 2008 TB2 - see above Grabbed MPEC 2008-T41 - 2008 TC2 - see above Grabbed MPEC 2008-T42 - 2008 TD2 - see above Grabbed MPEC 2008-T43 - 2008 TE2 - see above Grabbed MPEC 2008-T44 - 2008 TF2 - see above
1601	Grabbed MPEC 2008-T39 - 2006 HD2 - see above
1457	Noted that NEODyS has updated its 2008 SH82 risk assessment - see above Noted that NEODyS has updated its 2008 ST7 risk assessment - see above Noted that NEODyS has updated its 2008 SV11 risk assessment - see above Noted that NEODyS has updated its 2008 TE risk assessment - see above Grabbed MPEC 2008-T38 - Daily Orbit Update - see above
1456	Noted that JPL Sentry has removed 2008 SE85 as an impact risk - see above Noted that NEODyS has removed 2008 SE85 as an impact risk - see above Noted that JPL Sentry has updated its 2008 SH82 risk assessment - see above Noted that JPL Sentry has updated its 2008 ST7 risk assessment - see above Noted that JPL Sentry has updated its 2008 SV11 risk assessment - see above Noted that JPL Sentry has updated its 2008 TE risk assessment - see above

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