2008-10-21 Tracking News

Contents on 21 October '08

IAU Minor Planet Center
- NEOCP Activity -- six listings: 6 updated
- New MPECs -- five MPECs
Observers -- 23 observing facilities
Impact Risk Monitoring -- two 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 21 October '08

The MPC's NEO Confirmation Page has 6 listings: 6 updated

When last checked at 2359 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had six updated listings. All of these were "one nighters." So far The Tracking News has counted a total of nine 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 21 October '08

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been five MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-U28 time-stamped "06:11 UT" - Daily Orbit Update - see below
MPEC 2008-U29 time-stamped "15:37 UT" - Comet P/2008 U1 (McMillan) - see below
MPEC 2008-U30 time-stamped "15:57 UT" - 2008 UQ - see below
MPEC 2008-U31 time-stamped "16:01 UT" - 2008 UR - see below
MPEC 2008-U32 time-stamped "17:34 UT" - 2008 US

MPEC 2008-U32 - "17:34 UT" - 2008 US

K08U00S 2008 US (small asteroid, Earth MOID=0.0 LD, H=31.6 ~2m) was discovered at 0942 UT on 21 Oct. by the Mt. Lemmon Survey (MLS), which observed it at Oct. 21.35-44p15. This object is now within ten lunar distances (LD) of Earth, reaching 0.1 LD on 21 Oct. (INTRUDER).

MPEC 2008-U31 - "16:01 UT" - 2008 UR

K08U00R 2008 UR (small asteroid, Earth MOID=7.7 LD, H=27.0 ~13m) was discovered at 0824 UT on 20 Oct. by MLS, which observed it at Oct. 20.35-37p4, 20.43-44p8, and 21.31p4. The discovery was confirmed by Sabino Canyon Obs. (Oct. 21.37-38p3). This object will be coming within ten lunar distances (LD) of Earth, reaching 8.6 LD on 28 Oct.

MPEC 2008-U30 - "15:57 UT" - 2008 UQ

K08U00Q 2008 UQ (H=21.7 ~155m) was discovered at 0613 UT on 20 Oct. by MLS, which observed it at Oct. 20.26-31p8, 20.40-41p4, and 21.30-31p4. The discovery was confirmed by the Spacewatch 1.8m telescope (Oct. 21.35-36p3).

MPEC 2008-U29 - "15:37 UT" - Comet P/2008 U1 (McMillan)

PK08U010 P/2008 U1 (McMillan) (q=2.524 AU, Q=5.562 AU, TP=2008 May 12.8317 TT) from the Spacewatch 0.9m telescope (Sept. 20.36-39p3, Oct. 6.33-36p3 & 10.33-36p3), Spacewatch 1.8m (Oct. 19.20-24p3), and MLS (Oct. 20.37-39p4)

<< DOU on 21 Oct. '08 >> MPEC 2008-U28 - "06:11 UT" - Daily Orbit Update

Observations of risk-listed objects
K08S07T 2008 ST7 (small asteroid, arc=26 days, H=24.1 ~51m) from Astronomical Research Obs. (ARO) (Oct. 20.15-19p3 at V=22.5-7)
Observations of recently (no longer) risk-listed objects
K08T25V 2008 TV25 (arc=11 days, H=19.9 ~355m) from Desert Moon Obs. (Oct. 20.45-46p3)
K08T10P 2008 TP10 (small asteroid, arc=12 days, H=22.5 ~107m) from ARO (Oct. 20.22-26p4 at V=22.2-4) and Spacewatch 1.8m (Oct. 20.25-26p3 at V=21.6-22.1)
K08T04C 2008 TC4 (q=0.348 AU, arc=14 days, H=21.5 ~170m) from Eschenberg Obs. (Oct. 20.74p7)
K08S82H 2008 SH82 (arc=24 days, H=21.0 ~214m) from ARO (Oct. 20.02-03p3) and Desert Moon Obs. (Oct. 20.08p1 & 20.12-14p2)
Observations of small asteroids (H>22.0)
K08U00F 2008 UF (arc=0 days, H=26.2 ~19m) from ARO (Oct. 20.34p3)
K08U00B 2008 UB (i=36.5°, arc=1 day, H=22.2 ~123m) from Schiaparelli Obs. (Oct. 20.05p1 & 20.10p1), ARO (Oct. 20.09-10p3), and Desert Moon Obs. (Oct. 20.28-32p3)
K08T26T 2008 TT26 (arc=12 days, H=23.6 ~65m) from Stammersdorf Obs. (Oct. 20.80-82p5)
K08T00G 2008 TG (arc=19 days, H=23.0 ~85m) from Spacewatch 1.8m (Oct. 20.23-24p3)
Observations of other objects
K08TF7K 2008 TK157 (arc=28 days, H=20.6 ~257m) from Alter Satzberg Obs. (Oct. 20.92-93p3)
K08TF7J 2008 TJ157 (Q=4.340 AU, arc=4 days, H=21.2 ~195m) from the Catalina Sky Survey (CSS) (Oct. 6.36-38p4)
K08T26V 2008 TV26 from Thierry Pauwels via Uccle Obs. (Oct. 20.03-07p3)
K08T10M 2008 TM10 (arc=3 days, H=19.3 ~467m) from Schiaparelli Obs. (Oct. 9.80-81p5)
K08T04F 2008 TF4 (arc=14 days, H=19.3 ~467m) from Desert Moon Obs. (Oct. 20.25-27p5) and Guidestar Obs. (Oct. 20.78-79p3)
K08T02R 2008 TR2 (arc=15 days, H=19.9 ~355m) from Desert Moon Obs. (Oct. 20.42-43p3)
K08T01A 2008 TA1 (arc=18 days, H=18.7 ~616m) from Desert Moon Obs. (Oct. 20.19-23p3)
K08SO5X 2008 SX245 (arc=21 days, H=17.9 ~891m) from ARO (Oct. 20.37-38p3)
K08S11W 2008 SW11 (arc=24 days, H=21.2 ~195m) from Spacewatch 1.8m (Oct. 18.22-23p3)
K08S01O 2008 SO1 (Q=4.608 AU, arc=28 days, H=19.4 ~446m) from ARO (Oct. 20.38p1)
K08S00E 2008 SE (arc=30 days, H=19.3 ~467m) from Hamamatsu-Yuto Obs. (Oct. 20.65-67p5 & 20.73-76p2)
K08R24Q 2008 RQ24 (arc=46 days, H=20.8 ~234m) from Mirasteilas Obs. (Oct. 20.91-92p3)
K08Q11S 2008 QS11 (arc=42 days, H=19.9 ~355m) from Oakley Southern Sky Obs. (OSSO) (Sept. 26.47-59p15, 27.48-59p15, 28.50-59p15, 28.76-78p3, 29.52-78p28 & 30.55-59p10)
K08M01H 2008 MH1 (Q=4.263 AU, arc=113 days, H=18.4 ~708m) from Lumezzane Obs. (Oct. 19.75-76p4)
K08J07Z 2008 JZ7 (Q=4.382 AU, arc=168 days, H=18.6 ~645m) from Schiaparelli Obs. (Oct. 9.95p2 & 10.05p2)
K06V14B 2006 VB14 (arc=2 opp, H=18.7 ~616m) from Desert Moon Obs. (Oct. 20.49-51p2)
K04T11U 2004 TU11 (arc=2 opp, H=21.2 ~195m) from Spacewatch 1.8m (Oct. 20.27p3)
K04B86E 2004 BE86 (arc=2 opp, H=20.9 ~224m) from Spacewatch 1.8m (Oct. 20.28-29p3)
K03E01H 2003 EH1 (i=70.8°, Q=5.061 AU, arc=3 opp, H=16.4 ~1.78 km) from David Tholen's team on Mauna Kea (April 22.60-61p5, 25.62p2 & May 20.61p3)
K02X04H 2002 XH4 (arc=4 opp, H=19.3 ~467m) from Desert Moon Obs. (Oct. 20.37-39p2)
K02S41S 2002 SS41 (i=63.7°, arc=3 opp, H=17.3 ~1.17 km) from Schiaparelli Obs. (Oct. 9.92-93p2 & 10.03-04p3)
K01U04Y 2001 UY4 (q=0.309 AU, arc=5 opp, H=18.2 ~776m) from Schiaparelli Obs. (Oct. 20.04-05p3)
K01T01W 2001 TW1 (arc=5 opp, H=19.1 ~513m) from Schiaparelli Obs. (Oct. 20.03p3 & 20.08-09p2)
K01T00C 2001 TC (arc=2 opp, H=20.6 ~257m) from MLS (Oct. 20.17-18p4)
K01S10G 2001 SG10 (arc=5 opp, H=20.3 ~295m) from Eschenberg Obs. (Oct. 20.84p5)
J98V00O 1998 VO (arc=4 opp, H=20.4 ~282m) from Drebach Obs. (Oct. 20.72-73p4)
J98S70J 1998 SJ70 (arc=3 opp, H=18.4 ~708m) from Lumezzane Obs. (Oct. 19.88-89p4)
J94A01W 1994 AW1 (arc=3 opp, H=17.5 ~1.07 km) from Lumezzane Obs. (Oct. 19.73-74p4)
J0166 190166 2005 UP156 from Spacewatch 0.9m (Oct. 20.25-29p3)
J0135 190135 2005 QE30 from Goodricke-Pigott Obs. (Oct. 19.10-13p3)
I5851 185851 2000 DP107 from Eschenberg Obs. (Oct. 20.73p3)
G2186 162186 1999 OP3 from Mirasteilas Obs. (Oct. 20.81-82p3)
F5140 155140 2005 UD from Mirasteilas Obs. (Oct. 20.97-98p3)
F2685 152685 1998 MZ from MLS (Oct. 20.22-23p4)
D7032 137032 1998 UO1 from Hamamatsu-Yuto Obs. (Oct. 20.45-49p3) and Siegen Obs. (Oct. 20.88p3)
54071 54071 2000 GQ146 from Lumezzane Obs. (Oct. 19.95-96p4)
39572 39572 1993 DQ1 from Schiaparelli Obs. (Oct. 19.91-93p2)
16960 16960 1998 QS52 from Schiaparelli Obs. (Oct. 19.87p5)
05143 5143 Heracles (1991 VL) from Crni Vrh Obs. (Oct. 19.99-01p4)
03200 3200 Phaethon (1983 TB) from Eschenberg Obs. (Oct. 20.85-86p7)
01865 1865 Cerberus (1971 UA) from Schiaparelli Obs. (Oct. 19.95p1 & 19.00p1)
01620 1620 Geographos (1951 RA) from Bolzaneto Obs. (Oct. 19.81-84p6) and Eschenberg Obs. (Oct. 20.72p6)

Observers on 21 October '08

A total of 23 observing facilities appear in today's MPECs.

Code	Observer / observatory
`B03`	Alter Satzberg Obs. in Austria, 1 in MPEC 2008-U28 -- 2008 TK157
`H55`	Astronomical Research Obs. (ARO) in Illinois, 7 in MPEC 2008-U28 -- 2008 UF, 2008 UB, 2008 TP10, 2008 SX245, 2008 ST7, 2008 SO1, 2008 SH82
`A88`	Bolzaneto Obs. in Italy, 1 in MPEC 2008-U28 -- 1620
`703`	Catalina Sky Survey in Arizona, 1 in MPEC 2008-U28 -- 2008 TJ157
`106`	Crni Vrh Obs. in Slovenia, 1 in MPEC 2008-U28 -- 5143
`448`	Desert Moon Obs. in New Mexico, 8 in MPEC 2008-U28 -- 2008 UB, 2008 TV25, 2008 TR2, 2008 TF4, 2008 TA1, 2008 SH82, 2006 VB14, 2002 XH4
`113`	Drebach Obs. in Germany, 1 in MPEC 2008-U28 -- 1998 VO
`151`	Eschenberg Obs. in Switzerland, 5 in MPEC 2008-U28 -- 2008 TC4, 2001 SG10, 185851, 3200, 1620
`683`	Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-U28 -- 190135
`A17`	Guidestar Obs. in Germany, 1 in MPEC 2008-U28 -- 2008 TF4
`379`	Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2008-U28 -- 2008 SE, 137032
`130`	Lumezzane Obs. in Italy, 4 in MPEC 2008-U28 -- 2008 MH1, 1998 SJ70, 1994 AW1, 54071
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-U28 -- 2003 EH1
`B67`	Mirasteilas Obs. in Switzerland, 3 in MPEC 2008-U28 -- 2008 RQ24, 162186, 155140
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2008-U28, 2008-U29, 2008-U30, 2008-U31 & 2008-U32 -- 2008 US, 2008 UR, 2008 UQ, P/2008 U1, 2001 TC, 152685
`E09`	Oakley Southern Sky Obs. in New South Wales, 1 in MPEC 2008-U28 -- 2008 QS11
`854`	Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-U31 -- 2008 UR
`204`	Schiaparelli Obs. in Italy, 9 in MPEC 2008-U28 -- 2008 UB, 2008 TM10, 2008 JZ7, 2002 SS41, 2001 UY4, 2001 TW1, 39572, 16960, 1865
`510`	Siegen Obs. in Germany, 1 in MPEC 2008-U28 -- 137032
`691`	Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2008-U28 & 2008-U29 -- P/2008 U1, 190166
`291`	Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2008-U28, 2008-U29 & 2008-U30 -- 2008 UQ, P/2008 U1, 2008 TP10, 2008 TG, 2008 SW11, 2004 TU11, 2004 BE86
`A97`	Stammersdorf Obs. in Austria, 1 in MPEC 2008-U28 -- 2008 TT26
`0122`	Thierry Pauwels via Uccle Obs. in Belgium, 1 in MPEC 2008-U28 -- 2008 TV26

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

Impact Risk Monitoring on 21 October '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2359 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 UC	NEODyS	1423	2014-2079	13	2.02e-08	-4.27	-4.67	0	NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2008/10/19.548 to 2008/10/20.404."

2008 ST7	JPL Sentry	1423	2073-2108	27	5.1e-05	-4.21	-4.46	0	JPL: "Analysis based on 102 observations spanning 25.894 days (2008-Sep-24.29993 to 2008-Oct-20.19412)." Diameter approximately 0.051 km. from mean, weighted H=24.1.
2008 ST7	NEODyS	1423	2074-2089	4	1.88e-07	-6.51	-6.66	0	NEODyS: "Based on 108 optical observations (of which 6 are rejected as outliers) from 2008/09/24.301 to 2008/10/20.195."

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 21 October '08

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

1801	Grabbed MPEC 2008-U32 - 2008 US - see above
1629	Grabbed MPEC 2008-U29 - Comet P/2008 U1 (McMillan) - see above Grabbed MPEC 2008-U30 - 2008 UQ - see above Grabbed MPEC 2008-U31 - 2008 UR - see above
1423	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 NEODyS has posted 2008 UC as an impact risk - see above Grabbed MPEC 2008-U28 - Daily Orbit Update - see above

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