2008-10-22 Tracking News

Contents on 22 October '08

IAU Minor Planet Center
- NEOCP Activity -- four listings: 1 new, 3 updated
- New MPECs -- seven MPECs
Observers -- seventeen observing facilities
Impact Risk Monitoring -- three 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 22 October '08

The MPC's NEO Confirmation Page has 4 listings: 1 new, 3 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and three updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of eleven 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 22 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-U33 time-stamped "01:33 UT" - 2008 UU - see below
MPEC 2008-U34 time-stamped "01:36 UT" - 2008 UV - see below
MPEC 2008-U35 time-stamped "02:09 UT" - 2008 UX - see below
MPEC 2008-U36 time-stamped "06:11 UT" - Daily Orbit Update - see below
MPEC 2008-U37 time-stamped "19:24 UT" - 2008 UD1 - see below
MPEC 2008-U38 time-stamped "19:27 UT" - 2008 UE1 - see below
MPEC 2008-U39 time-stamped "19:29 UT" - 2008 UF1

MPEC 2008-U39 - "19:29 UT" - 2008 UF1

K08U01F 2008 UF1 (risk-listed, Earth MOID=3.7 LD, H=26.0 ~21m) was discovered at 0819 UT on 22 Oct. by the Mt. Lemmon Survey (MLS), which observed it at Oct. 22.32-35p8 and 22.39-46p15. This object was within ten lunar distances (LD) of Earth, reaching 6.5 LD on 21 Oct.

MPEC 2008-U38 - "19:27 UT" - 2008 UE1

K08U01E 2008 UE1 (small asteroid, H=23.9 ~56m) was discovered at 0827 UT on 21 Oct. by MLS, which observed it at Oct. 21.35-40p8 at V=20.3-22.1 and 22.23-24p4 at V=21.8-22.3. The discovery was confirmed by the Spacewatch 1.8m telescope (Oct. 22.35-36p3).

MPEC 2008-U37 - "19:24 UT" - 2008 UD1

K08U01D 2008 UD1 (H=18.5 ~676m) was discovered at 0656 UT on 21 Oct. by MLS, which observed it at Oct. 21.29-30p3, 21.35-36p2, 22.23p3, and 22.29-30p2. The discovery was confirmed by Spacewatch 1.8m (Oct. 22.29p3 at V=21.8-22.6).

<< DOU on 22 Oct. '08 >> MPEC 2008-U36 - "06:11 UT" - Daily Orbit Update

Observations of risk-listed objects
K08U00C 2008 UC from the Siding Spring Survey (SSS) (Oct. 20.56p1)
Observations of recently (no longer) risk-listed objects
K08T27D 2008 TD27 (arc=11 days, H=20.0 ~339m) from Spacewatch 1.8m (Oct. 21.33-34p3)
K08T25V 2008 TV25 (arc=11 days, H=20.0 ~339m) from Faulkes Telescope South (Oct. 20.63-64p4)
K08T04C 2008 TC4 (q=0.348 AU, arc=15 days, H=21.5 ~170m) from Petit Jean Mtn. South Obs. (PJMSO) (Oct. 21.16-18p6)
K08T03Z 2008 TZ3 (arc=15 days, H=20.3 ~295m) from Astronomical Research Obs. (ARO) (Oct. 20.15-20p4) and Spacewatch 1.8m (Oct. 21.31-32p3)
K08T02D 2008 TD2 (arc=17 days, H=21.5 ~170m) from ARO (Oct. 20.28-29p3)
Observations of small asteroids (H>22.0)
K08T26T 2008 TT26 (arc=12 days, H=23.6 ~65m) from Stammersdorf Obs. (Oct. 20.83-87p5), PJMSO (Oct. 21.29p8), Vallemare di Borbona Obs. (Oct. 21.79-81p2 & 21.92-97p3), and Great Shefford Obs. (Oct. 22.15p3)
K08T09Y 2008 TY9 (arc=13 days, H=24.9 ~35m) from ARO (Oct. 20.24p3)
K08T03Y 2008 TY3 (arc=15 days, H=24.1 ~51m) from Spacewatch 1.8m (Oct. 21.41-42p3)
K08T03X 2008 TX3 (arc=14 days, H=24.9 ~35m) from ARO (Oct. 20.22-23p6)
K08SF0U 2008 SU150 (arc=21 days, H=22.8 ~93m) from ARO (Oct. 20.05-07p2 at V=22.1-2)
K08S01Z 2008 SZ1 (arc=27 days, H=24.6 ~41m) from ARO (Oct. 20.31-34p3 at V=21.9-22.1)
K08Q11W 2008 QW11 (arc=56 days, H=23.3 ~74m) from Spacewatch 1.8m (Oct. 21.47-48p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K08S01W 2008 SW1 (arc=28 days, H=21.9 ~141m) from ARO (Oct. 20.30-32p2) and Spacewatch 1.8m (Oct. 21.45-46p3)
Observations of other objects
K08T26V 2008 TV26 (q=2.020 AU, arc=12 days, H=17.7 ~977m) from Altschwendt Obs. (Oct. 18.96-99p3 & 20.93-96p3) and Wildberg Obs. (Oct. 19.88-89p3 & 20.83-87p4)
K08T04F 2008 TF4 (arc=14 days, H=19.4 ~446m) from ARO (Oct. 20.11p4)
K08T02R 2008 TR2 (arc=15 days, H=19.9 ~355m) from ARO (Oct. 20.28-29p6)
K08SP1S 2008 SS251 (arc=26 days, H=21.0 ~214m) from Great Shefford Obs. (Oct. 22.16-17p2)
K08S07Q 2008 SQ7 (arc=27 days, H=19.9 ~355m) from ARO (Oct. 20.39-40p3)
K08S07P 2008 SP7 (Q=4.200 AU, arc=27 days, H=19.0 ~537m) from ARO (Oct. 20.39-40p3)
K08S01Q 2008 SQ1 (Q=4.682 AU, arc=2 opp, H=18.3 ~741m) from PJMSO (Oct. 21.27-28p6)
K08S00Q 2008 SQ (arc=30 days, H=19.5 ~426m) from PJMSO (Oct. 21.30-32p6)
K08R01J 2008 RJ1 (arc=47 days, H=17.9 ~891m) from ARO (Oct. 20.09-11p3) and Spacewatch 1.8m (Oct. 21.29-30p3)
K08P03L 2008 PL3 (arc=78 days, H=19.4 ~446m) from PJMSO (Oct. 21.23p3)
K07Y00J 2007 YJ (arc=2 opp, H=21.7 ~155m) from the Spacewatch 0.9m telescope (Oct. 17.22-30p3 & 18.13-15p2)
K05T15R 2005 TR15 (arc=2 opp, H=18.6 ~645m) from Spacewatch 0.9m (Oct. 17.25-32p3, 18.17p1 & 18.22p1)
K04T11U 2004 TU11 (arc=2 opp, H=21.2 ~195m) from Spacewatch 1.8m (Oct. 21.44p3)
K03SH0G 2003 SG170 (i=36.9°, arc=4 opp, H=17.7 ~977m) from Spacewatch 0.9m (Oct. 21.10-13p3)
K01U16Z 2001 UZ16 (arc=3 opp, H=19.4 ~446m) from PJMSO (Oct. 21.13-14p6)
K01T01W 2001 TW1 (arc=5 opp, H=19.1 ~513m) from Crni Vrh Obs. (Oct. 21.01-04p4)
K01T00C 2001 TC (arc=2 opp, H=20.6 ~257m) from MLS (Oct. 21.17-19p4)
K01SR6G 2001 SG276 (arc=4 opp, H=17.7 ~977m) from Spacewatch 0.9m (Oct. 21.27-31p3)
K00Y29O 2000 YO29 (i=54.6°, arc=2 opp, H=17.5 ~1.07 km) from MLS (Oct. 21.10-12p4)
K00J03Q 2000 JQ3 (arc=3 opp, H=18.2 ~776m) from MLS (Oct. 21.29-30p4)
J94A01W 1994 AW1 (arc=3 opp, H=17.5 ~1.07 km) from PJMSO (Oct. 21.12-13p5)
G2825 162825 2001 BO61 from MLS (Oct. 21.31-32p4)
G2215 162215 1999 TL12 from Spacewatch 0.9m (Oct. 18.13-16p2)
F9923 159923 2004 YJ32 from Spacewatch 0.9m (Oct. 17.50-51p2)
F5110 155110 2005 TB from Spacewatch 0.9m (Oct. 21.44-47p3)
54071 54071 2000 GQ146 from MLS (Oct. 21.31-32p4)
39572 39572 1993 DQ1 from PJMSO (Oct. 21.14-15p5)
16960 16960 1998 QS52 from Mt. Tuffley Obs. (Oct. 21.77-78p3)
11500 11500 1989 UR from Timberlake Obs. (Oct. 21.03-06p2)
09856 9856 1991 EE from Goodricke-Pigott Obs. (Oct. 20.34-37p3)
04183 4183 Cuno (1959 LM) from Crni Vrh Obs. (Oct. 20.93-96p4) and MLS (Oct. 21.25-27p4)
02212 2212 Hephaistos (1978 SB) from Spacewatch 0.9m (Oct. 21.38-42p3)

MPEC 2008-U35 - "02:09 UT" - 2008 UX

K08U00X 2008 UX (q=0.217 AU, H=20.6 ~257m) was discovered at 0755 UT on 21 Oct. by MLS, which observed it at Oct. 21.33-40p12. The discovery was confirmed by Sabino Canyon Obs. (Oct. 21.41-42p3) and Great Shefford Obs. (Oct. 22.05-07p3).

MPEC 2008-U34 - "01:36 UT" - 2008 UV

K08U00V 2008 UV (small asteroid, H=24.9 ~35m) was discovered at 0942 UT on 21 Oct. by MLS, which observed it at Oct. 21.35-44p20 and 21.48p3. The discovery was confirmed by Great Shefford Obs. (Oct. 21.91-93p3).

MPEC 2008-U33 - "01:33 UT" - 2008 UU

K08U00U 2008 UU (small asteroid, Q=4.320 AU, H=24.7 ~39m) was discovered at 0828 UT on 21 Oct. by MLS, which observed it at Oct. 21.35-43p10. The discovery was confirmed by Great Shefford Obs. (Oct. 21.00-02p3).

Observers on 22 October '08

Seventeen observing facilities appear in today's MPECs.

Code	Observer / observatory
`A44`	Altschwendt Obs. in Austria, 1 in MPEC 2008-U36 -- 2008 TV26
`H55`	Astronomical Research Obs. (ARO) in Illinois, 12 in MPEC 2008-U36 -- 2008 TZ3, 2008 TY9, 2008 TX3, 2008 TR2, 2008 TF4, 2008 TD2, 2008 SZ1, 2008 SW1, 2008 SU150, 2008 SQ7, 2008 SP7, 2008 RJ1
`106`	Crni Vrh Obs. in Slovenia, 2 in MPEC 2008-U36 -- 2001 TW1, 4183
`E10`	Faulkes Telescope South in New South Wales, 1 in MPEC 2008-U36 -- 2008 TV25
`683`	Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-U36 -- 9856
`J95`	Great Shefford Obs. in England, 5 in MPECs 2008-U33, 2008-U34, 2008-U35 & 2008-U36 -- 2008 UX, 2008 UV, 2008 UU, 2008 TT26, 2008 SS251
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2008-U33, 2008-U34, 2008-U35, 2008-U36, 2008-U37, 2008-U38 & 2008-U39 -- 2008 UX, 2008 UV, 2008 UU, 2008 UF1, 2008 UE1, 2008 UD1, 2001 TC, 2000 YO29, 2000 JQ3, 54071, 162825, 4183
`J93`	Mt. Tuffley Obs. in England, 1 in MPEC 2008-U36 -- 16960
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 8 in MPEC 2008-U36 -- 2008 TT26, 2008 TC4, 2008 SQ1, 2008 SQ, 2008 PL3, 2001 UZ16, 1994 AW1, 39572
`854`	Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-U35 -- 2008 UX
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2008-U36 -- 2008 UC
`691`	Spacewatch 0.9m telescope in Arizona, 8 in MPEC 2008-U36 -- 2007 YJ, 2005 TR15, 2003 SG170, 2001 SG276, 162215, 159923, 155110, 2212
`291`	Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2008-U36, 2008-U37 & 2008-U38 -- 2008 UE1, 2008 UD1, 2008 TZ3, 2008 TY3, 2008 TD27, 2008 SW1, 2008 RJ1, 2008 QW11, 2004 TU11
`A97`	Stammersdorf Obs. in Austria, 1 in MPEC 2008-U36 -- 2008 TT26
`H83`	Timberlake Obs. in Virginia, 1 in MPEC 2008-U36 -- 11500
`A55`	Vallemare di Borbona Obs. in Italy, 1 in MPEC 2008-U36 -- 2008 TT26
`198`	Wildberg Obs. in Germany, 1 in MPEC 2008-U36 -- 2008 TV26

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

Impact Risk Monitoring on 22 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 UF1	JPL Sentry	2123	2050-2078	2	4.6e-08	-7.48	-7.65	0	JPL: "Analysis based on 23 observations spanning .13242 days (2008-Oct-22.32334 to 2008-Oct-22.45576)." Diameter approximately 0.023 km. from mean, weighted H=25.8.

2008 US	NEODyS	1454	2010-2080	55	2.32e-05	-6.53	-6.83	0	NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/10/21.355 to 2008/10/21.436."

2008 UC	JPL Sentry	1454	2038-2105	14	1.3e-08	-5.05	-5.57	0	JPL: "Analysis based on 13 observations spanning 1.0124 days (2008-Oct-19.54688 to 2008-Oct-20.55929)." Diameter approximately 0.570 km. from mean, weighted H=18.8.
2008 UC	NEODyS	1454	2021-2088	12	5.24e-09	-5.20	-5.77	0	NEODyS: "Based on 13 optical observations (of which 1 are rejected as outliers) from 2008/10/19.548 to 2008/10/20.560."

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 22 October '08

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

2123	Noted that JPL Sentry has posted 2008 UF1 as an impact risk - see above Grabbed MPEC 2008-U37 - 2008 UD1 - see above Grabbed MPEC 2008-U38 - 2008 UE1 - see above Grabbed MPEC 2008-U39 - 2008 UF1 - see above
1454	Noted that JPL Sentry has updated its 2008 UC risk assessment - see above Noted that NEODyS has updated its 2008 UC risk assessment - see above Noted that NEODyS has posted 2008 US as an impact risk - see above Grabbed MPEC 2008-U36 - Daily Orbit Update - see above
0259	Grabbed MPEC 2008-U35 - 2008 UX - see above
0200	Grabbed MPEC 2008-U33 - 2008 UU - see above Grabbed MPEC 2008-U34 - 2008 UV - see above

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