2008-10-03 Tracking News

Contents on 3 October '08

IAU Minor Planet Center
- NEOCP Activity -- twelve listings: 2 new, 10 updated
- New MPECs -- seven MPECs
Observers -- 22 observing facilities
Impact Risk Monitoring -- six 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 3 October '08

The MPC's NEO Confirmation Page has 12 listings: 2 new, 10 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new and ten updated listings. Of these, seven were "one nighters." So far The Tracking News has counted a total of 22 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 3 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-T31 time-stamped "06:09 UT" - Daily Orbit Update - see below
MPEC 2008-T32 time-stamped "16:53 UT" - 2008 TZ - see below
MPEC 2008-T33 time-stamped "16:57 UT" - 2008 TA1 - see below
MPEC 2008-T34 time-stamped "17:01 UT" - 2008 TB1 - see below
MPEC 2008-T35 time-stamped "17:05 UT" - 2008 TC1 - see below
MPEC 2008-T36 time-stamped "17:08 UT" - 2008 TD1 - see below
MPEC 2008-T37 time-stamped "17:43 UT" - 2008 TE1

MPEC 2008-T37 - "17:43 UT" - 2008 TE1

K08T01E 2008 TE1 (small asteroid, Earth MOID=9.5 LD, H=25.4 ~28m) was discovered at 0706 UT on 2 Oct. by LINEAR, which observed it at Oct. 2.30-33p4. The discovery was confirmed by Great Shefford Obs. (Oct. 2.94-95p3), Sandlot Obs. (Oct. 3.37p3), Sabino Canyon Obs. (Oct. 3.40-41p3), and Magdalena Ridge Obs. (MRO) (Oct. 3.44-47p4).

MPEC 2008-T36 - "17:08 UT" - 2008 TD1

K08T01D 2008 TD1 (small asteroid, H=25.0 ~34m) was discovered at 0636 UT on 2 Oct. by the Mt. Lemmon Survey (MLS), which observed it at Oct. 2.28-30p4 at V=20.7-22.3, 2.34-37p4 at V=20.9-21.9, and 3.23-24p4 at V=21.7-21.8. The discovery was confirmed by the Spacewatch 1.8m telescope (Oct. 3.25-26p3) and MRO (Oct. 3.36-38p3).

MPEC 2008-T35 - "17:05 UT" - 2008 TC1

K08T01C 2008 TC1 (small asteroid, H=24.0 ~54m) was discovered at 0630 UT on 2 Oct. by MLS, which observed it at Oct. 2.27-29p4, 2.34-37p4, and 3.19-20p3. The discovery was confirmed by Spacewatch 1.8m (Oct. 3.23p3) and MRO (Oct. 3.30-31p3).

MPEC 2008-T34 - "17:01 UT" - 2008 TB1

K08T01B 2008 TB1 (small asteroid, Q=4.217 AU, H=22.2 ~123m) was discovered at 0544 UT on 2 Oct. by MLS, which observed it at Oct. 2.24-29p8 at V=21.2-22.4, 2.34-36p3 at V=21.7, and 3.18-19p4 at V=21.4-21.8. The discovery was confirmed by MRO (Oct. 3.27-29p3).

MPEC 2008-T33 - "16:57 UT" - 2008 TA1

K08T01A 2008 TA1 (H=18.5 ~676m) was discovered at 0459 UT on 2 Oct. by the Spacewatch 0.9m telescope, which observed it at Oct. 2.21-24p3. The discovery was confirmed by Spacewatch 1.8m (Oct. 2.29-30p3 & 3.20-21p3), Astronomical Research Obs. (ARO) (Oct. 2.32-33p3), MRO (Oct. 2.43-44p4), Inastars Obs. (Oct. 2.92p4), and MLS (Oct. 3.34-35p4).

MPEC 2008-T32 - "16:53 UT" - 2008 TZ

K08T00Z 2008 TZ (small asteroid, Earth MOID=1.4 LD, H=25.3 ~29m) was discovered at 0441 UT on 2 Oct. by Spacewatch 0.9m, which observed it at Oct. 2.20-23p3. The discovery was confirmed by Spacewatch 1.8m (Oct. 2.28-29p3 & 3.19p2), MRO (Oct. 2.29p4 & 3.41-43p10), ARO (Oct. 2.30-32p3), MLS (Oct. 3.34-35p4), Heath Rhoades via Table Mtn. Obs. (Oct. 3.34-35p3), and Sandlot Obs. (Oct. 3.35-36p3). This object will be coming within ten lunar distances (LD) of Earth, reaching 5.3 LD on 11 Oct.

<< DOU on 3 Oct. '08 >> MPEC 2008-T31 - "06:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K08T00E 2008 TE (small asteroid, arc=1 day, H=27.7 ~10m) from ARO (Oct. 2.16-17p3)
K08T00B 2008 TB (small asteroid, arc=1 day, H=25.4 ~28m) from ARO (Oct. 2.21p3)
K08S85E 2008 SE85 (arc=4 days, H=19.7 ~389m) from ARO (Oct. 2.36-37p4) and Spacewatch 1.8m (Oct. 2.39-40p3)
K08S82H 2008 SH82 (arc=6 days, H=21.1 ~204m) from ARO (Oct. 2.05p1) and Sandlot Obs. (Oct. 2.16p1)
K08S11V 2008 SV11 (Q=4.507 AU, arc=8 days, H=18.2 ~776m) from ARO (Oct. 2.23-24p3), Sandlot Obs. (Oct. 2.28p1), MRO (Oct. 2.30-31p3), and Spacewatch 1.8m (Oct. 3.14-15p3)
K08S07T 2008 ST7 (small asteroid, arc=8 days, H=24.0 ~54m) from Spacewatch 1.8m (Oct. 2.31p3) and ARO (Oct. 2.33-35p3)
Observations of recently (no longer) risk-listed objects
K08SE8J 2008 SJ148 (small asteroid, arc=3 days, H=24.3 ~47m) from ARO (Oct. 2.34-36p3) and Spacewatch 1.8m (Oct. 2.43-44p3)
K08S01U 2008 SU1 (arc=9 days, H=19.1 ~513m) from Schiaparelli Obs. (Sept. 23.94-95p2) and Desert Moon Obs. (Oct. 2.32-33p3)
K08S00O 2008 SO (arc=11 days, H=20.8 ~234m) from the Catalina Sky Survey (CSS) (Oct. 2.35-38p4)
K08R98M 2008 RM98 (Q=4.203 AU, arc=25 days, H=20.1 ~323m) from Spacewatch 1.8m (Oct. 2.36p3)
K08R01J 2008 RJ1 (arc=28 days, H=17.8 ~933m) from Spacewatch 1.8m (Oct. 2.38-39p3)
K08R01H 2008 RH1 (small asteroid, arc=28 days, H=22.6 ~102m) from Spacewatch 1.8m (Oct. 2.37-38p3)
Observations of small asteroids (H>22.0)
K08T00K 2008 TK (arc=1 day, H=23.2 ~78m) from LINEAR (Oct. 2.35-45p10)
K08T00G 2008 TG (arc=1 day, H=23.1 ~81m) from ARO (Oct. 2.25-27p3)
K08T00D 2008 TD (arc=1 day, H=25.4 ~28m) from ARO (Oct. 2.12-13p3)
K08S00S 2008 SS (arc=11 days, H=22.2 ~123m) from ARO (Oct. 2.12-13p4)
K08S00P 2008 SP (arc=11 days, H=23.2 ~78m) from Spacewatch 1.8m (Oct. 2.22-23p3)
K08R01K 2008 RK1 (Q=4.377 AU, arc=28 days, H=22.2 ~123m) from Spacewatch 1.8m (Oct. 2.33-34p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K08T00F 2008 TF (arc=1 day, H=21.8 ~148m) from ARO (Oct. 2.14-15p4)
Observations of other objects
K08SE8Y 2008 SY148 (arc=3 days, H=21.7 ~155m) from Tiki Obs. (Oct. 2.59-61p2)
K08S85C 2008 SC85 (arc=5 days, H=19.3 ~467m) from Desert Moon Obs. (Oct. 2.12-17p3)
K08S11W 2008 SW11 (arc=7 days, H=21.2 ~195m) from Spacewatch 1.8m (Oct. 2.45p2)
K08S07X 2008 SX7 (arc=11 days, H=18.4 ~708m) from ARO (Oct. 2.07-08p3), Desert Moon Obs. (Oct. 2.08-10p3), and MLS (Oct. 2.13-14p4)
K08S07R 2008 SR7 (arc=7 days, H=19.9 ~355m) from program code 8 via Faulkes Telescope North (Sept. 29.28p2)
K08S01R 2008 SR1 (arc=8 days, H=20.4 ~282m) from ARO (Oct. 1.25-26p4)
K08S01Q 2008 SQ1 (Q=4.682 AU, arc=2 opp, H=18.2 ~776m) from Schiaparelli Obs. (Sept. 23.92p2)
K08R98G 2008 RG98 (arc=23 days, H=17.2 ~1.23 km) from LINEAR (Oct. 2.23-28p4)
K08Q11S 2008 QS11 (arc=36 days, H=19.8 ~371m) from Oakley Southern Sky Obs. (OSSO) (Sept. 18.41-51p10) and LINEAR (Oct. 2.35-40p5)
K08Q03T 2008 QT3 (arc=38 days, H=18.5 ~676m) from ARO (Oct. 2.09-12p5)
K08Q00C 2008 QC (arc=44 days, H=20.6 ~257m) from MLS (Oct. 2.40-42p3)
K07Y00J 2007 YJ (arc=2 opp, H=21.7 ~155m) from Desert Moon Obs. (Oct. 2.36-39p3)
K04X44N 2004 XN44 (arc=2 opp, H=18.4 ~708m) from MLS (Oct. 2.27-30p4)
K04RP1M 2004 RM251 (Q=4.176 AU, arc=3 opp, H=17.7 ~977m) from Spacewatch 0.9m (Oct. 2.11-13p3)
K03R00M 2003 RM (Q=4.673 AU, arc=2 opp, H=19.7 ~389m) from Andrushivka Obs. (Sept. 28.78-81p3)
K02R25W 2002 RW25 (arc=3 opp, H=18.9 ~562m) from LINEAR (Oct. 2.41-46p5)
K01U16Z 2001 UZ16 (arc=3 opp, H=19.5 ~426m) from Ametlla del Valles Obs. (Oct. 1.90-91p4)
K01SR6G 2001 SG276 (arc=4 opp, H=17.7 ~977m) from LINEAR (Oct. 2.34-39p5)
K00Y29O 2000 YO29 (i=54.6°, arc=2 opp, H=17.4 ~1.12 km) from MLS (Oct. 2.09-15p8)
J0491 190491 2000 FJ10 from Desert Moon Obs. (Oct. 2.42-43p5)
I5851 185851 2000 DP107 from Urseanu Obs. (Oct. 1.84-86p3)
G2900 162900 2001 HG31 from LINEAR (Oct. 2.34-39p5)
G2510 162510 2000 QW69 from MLS (Oct. 2.18-20p4)
G2215 162215 1999 TL12 from LINEAR (Oct. 2.28-33p5) and CSS (Oct. 2.46-47p3)
G2186 162186 1999 OP3 from LINEAR (Oct. 2.22-27p5)
E0288 140288 2001 SN289 from MLS (Oct. 2.24-26p4)
D8947 138947 2001 BA40 from Herrenberg Obs. (Oct. 2.78-79p4)
D8847 138847 2000 VE62 from LINEAR (Oct. 2.23-28p5)
D7799 137799 1999 YB from LINEAR (Oct. 2.34-39p5)
A8906 108906 2001 PL9 from Spacewatch 0.9m (Oct. 2.11-13p3)
96315 96315 1997 AP10 from Spacewatch 0.9m (Oct. 2.49-50p2)
39572 39572 1993 DQ1 from Airali Obs. (Sept. 29.86-87p3)
11500 11500 1989 UR from LINEAR (Oct. 2.22-26p4)
05143 5143 Heracles (1991 VL) from LINEAR (Oct. 2.23-28p5)
02368 2368 Beltrovata (1977 RA) from Spacewatch 0.9m (Oct. 2.48-51p3)

Observers on 3 October '08

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

Code	Observer / observatory
`169`	Airali Obs. in Italy, 1 in MPEC 2008-T31 -- 39572
`B37`	Ametlla del Valles Obs. in Spain, 1 in MPEC 2008-T31 -- 2001 UZ16
`A50`	Andrushivka Obs. in the Ukraine, 1 in MPEC 2008-T31 -- 2003 RM
`H55`	Astronomical Research Obs. (ARO) in Illinois, 16 in MPECs 2008-T31, 2008-T32 & 2008-T33 -- 2008 TZ, 2008 TG, 2008 TF, 2008 TE, 2008 TD, 2008 TB, 2008 TA1, 2008 SX7, 2008 SV11, 2008 ST7, 2008 SS, 2008 SR1, 2008 SJ148, 2008 SH82, 2008 SE85, 2008 QT3
`703`	Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2008-T31 -- 2008 SO, 162215
`448`	Desert Moon Obs. in New Mexico, 5 in MPEC 2008-T31 -- 2008 SX7, 2008 SU1, 2008 SC85, 2007 YJ, 190491
`F658`	program code 8 via Faulkes Telescope North in Hawaii, 1 in MPEC 2008-T31 -- 2008 SR7
`J95`	Great Shefford Obs. in England, 1 in MPEC 2008-T37 -- 2008 TE1
`240`	Herrenberg Obs. in Germany, 1 in MPEC 2008-T31 -- 138947
`B15`	Inastars Obs. in Germany, 1 in MPEC 2008-T33 -- 2008 TA1
`704`	LINEAR in New Mexico, 13 in MPECs 2008-T31 & 2008-T37 -- 2008 TK, 2008 TE1, 2008 RG98, 2008 QS11, 2002 RW25, 2001 SG276, 162900, 162215, 162186, 138847, 137799, 11500, 5143
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 7 in MPECs 2008-T31, 2008-T32, 2008-T33, 2008-T34, 2008-T35, 2008-T36 & 2008-T37 -- 2008 TZ, 2008 TE1, 2008 TD1, 2008 TC1, 2008 TB1, 2008 TA1, 2008 SV11
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2008-T31, 2008-T32, 2008-T33, 2008-T34, 2008-T35 & 2008-T36 -- 2008 TZ, 2008 TD1, 2008 TC1, 2008 TB1, 2008 TA1, 2008 SX7, 2008 QC, 2004 XN44, 2000 YO29, 162510, 140288
`E09`	Oakley Southern Sky Obs. in New South Wales, 1 in MPEC 2008-T31 -- 2008 QS11
`854`	Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-T37 -- 2008 TE1
`H36`	Sandlot Obs. in Kansas, 4 in MPECs 2008-T31, 2008-T32 & 2008-T37 -- 2008 TZ, 2008 TE1, 2008 SV11, 2008 SH82
`204`	Schiaparelli Obs. in Italy, 2 in MPEC 2008-T31 -- 2008 SU1, 2008 SQ1
`691`	Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2008-T31, 2008-T32 & 2008-T33 -- 2008 TZ, 2008 TA1, 2004 RM251, 96315, 108906, 2368
`291`	Spacewatch 1.8m telescope in Arizona, 14 in MPECs 2008-T31, 2008-T32, 2008-T33, 2008-T35 & 2008-T36 -- 2008 TZ, 2008 TD1, 2008 TC1, 2008 TA1, 2008 SW11, 2008 SV11, 2008 ST7, 2008 SP, 2008 SJ148, 2008 SE85, 2008 RM98, 2008 RK1, 2008 RJ1, 2008 RH1
`6739`	Heath Rhoades via Table Mtn. Obs. in southern California, 1 in MPEC 2008-T32 -- 2008 TZ
`F85`	Tiki Obs. in Tahiti, 1 in MPEC 2008-T31 -- 2008 SY148
`A92`	Urseanu Obs. in Romania, 1 in MPEC 2008-T31 -- 185851

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

Impact Risk Monitoring on 3 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	1456	2023-2090	8	4.9e-05	-5.06	-5.06	0	NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2008/10/01.248 to 2008/10/02.332."
2008 TE	JPL Sentry	1455	2023-2096	14	5.5e-05	-5.02	-5.02	0	JPL: "Analysis based on 29 observations spanning 1.0846 days (2008-Oct-01.24709 to 2008-Oct-02.3317)." Diameter approximately 0.010 km. from mean, weighted H=27.7.

2008 TB	JPL Sentry	1455	R E M O V E D						JPL: Risk listing removed at 0931 UTC.

2008 SE85	NEODyS	1456	2027-2088	32	6.54e-08	-4.17	-4.53	0	NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2008/09/28.449 to 2008/10/02.400."
2008 SE85	JPL Sentry	1455	2027-2106	18	5.1e-08	-4.29	-4.65	0	JPL: "Analysis based on 33 observations spanning 3.9513 days (2008-Sep-28.44782 to 2008-Oct-02.39908)." Diameter approximately 0.400 km. from mean, weighted H=19.6.

2008 SH82	NEODyS	1456	2043-2081	5	9.44e-07	-4.25	-4.50	0	NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2008/09/26.214 to 2008/10/02.165."
2008 SH82	JPL Sentry	1455	2043-2081	6	1.1e-06	-4.13	-4.38	0	JPL: "Analysis based on 30 observations spanning 5.9515 days (2008-Sep-26.21299 to 2008-Oct-02.16454)." Diameter approximately 0.210 km. from mean, weighted H=21.1.

2008 SV11	NEODyS	1456	2047-2084	8	1.57e-09	-5.46	-5.68	0	NEODyS: "Based on 75 optical observations (of which 0 are rejected as outliers) from 2008/09/25.263 to 2008/10/03.151."
2008 SV11	JPL Sentry	1455	2026-2084	8	1.1e-08	-4.61	-4.84	0	JPL: "Analysis based on 75 observations spanning 7.8874 days (2008-Sep-25.26245 to 2008-Oct-03.14988)." Diameter approximately 0.750 km. from mean, weighted H=18.3.

2008 ST7	NEODyS	1456	2062-2089	11	4.2e-06	-5.09	-5.43	0	NEODyS: "Based on 63 optical observations (of which 6 are rejected as outliers) from 2008/09/24.301 to 2008/10/02.348."
2008 ST7	JPL Sentry	1455	2073-2108	43	4.0e-05	-4.25	-4.88	0	JPL: "Analysis based on 57 observations spanning 8.0468 days (2008-Sep-24.29993 to 2008-Oct-02.34678)." 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 3 October '08

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

1858	Grabbed MPEC 2008-T34 - 2008 TB1 - see above Grabbed MPEC 2008-T35 - 2008 TC1 - see above Grabbed MPEC 2008-T36 - 2008 TD1 - see above Grabbed MPEC 2008-T37 - 2008 TE1 - see above
1700	Grabbed MPEC 2008-T32 - 2008 TZ - see above Grabbed MPEC 2008-T33 - 2008 TA1 - see above
1456	Noted that NEODyS has updated its 2008 SE85 risk assessment - see above 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 Grabbed MPEC 2008-T31 - Daily Orbit Update - see above
1455	Noted that JPL Sentry has updated its 2008 SE85 risk assessment - 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 removed 2008 TB as an impact risk - see above Noted that JPL Sentry has updated its 2008 TE risk assessment - see above Noted that NEODyS has posted 2008 TE as an impact risk - see above

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