2008-12-09 Tracking News

Contents on 9 December '08

IAU Minor Planet Center
- NEOCP Activity -- none
- New MPECs -- one MPEC
Observers -- nineteen 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 9 December '08

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There were two listings noted earlier today.

New MPECs on 9 December '08

Minor Planet Electronic Circulars

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

<< DOU on 9 Dec. '08 >> MPEC 2008-X70 - "07:11 UT" - Daily Orbit Update

Observations of risk-listed objects
K08X01C 2008 XC1 (small asteroid, arc=6 days, H=23.6 ~65m) from San Marcello Pistoiese Obs. (Dec. 7.79-80p4), Stia Obs. (Dec. 7.82-83p3), GiaGa Obs. (Dec. 7.94-98p3), Petit Jean Mtn. South Obs. (PJMSO) (Dec. 8.36-37p7), Tradate Obs. (Dec. 8.90-92p2), Verona Obs. (Dec. 8.92-93p4), Madonna di Dossobuono Obs. (Dec. 8.94p3), and Mirasteilas Obs. (Dec. 8.98-99p4)
K08W94Y 2008 WY94 (small asteroid, arc=7 days, H=25.6 ~26m) from Great Shefford Obs. (Dec. 6.72-75p3)
Observations of recently (no longer) risk-listed objects
K08X02B 2008 XB2 (small asteroid, arc=5 days, H=25.1 ~32m) from Astronomical Research Obs. (ARO) (Dec. 7.16-17p6) and Madonna di Dossobuono Obs. (Dec. 8.87-88p3)
K08X01M 2008 XM1 (almost small, Q=4.156 AU, arc=5 days, H=22.0 ~135m) from Stia Obs. (Dec. 7.71-72p3), Balzaretto Obs. (Dec. 7.80-81p3), GiaGa Obs. (Dec. 7.93p1, 8.01p1 & 8.07p1), and Inastars Obs. (Dec. 9.03p3)
K08X00N 2008 XN (arc=6 days, H=21.2 ~195m) from the Mt. Lemmon Survey (MLS) (Dec. 8.14-16p4)
K08W59B 2008 WB59 (arc=16 days, H=19.4 ~446m) from Tradate Obs. (Dec. 8.78-79p2), Inastars Obs. (Dec. 8.86p4), and Verona Obs. (Dec. 8.95-96p4)
Observations of small asteroids (H>22.0)
K08X02C 2008 XC2 (arc=4 days, H=23.4 ~71m) from ARO (Dec. 7.35p5)
K08X01K 2008 XK1 (arc=4 days, H=23.6 ~65m) from ARO (Dec. 7.23-24p3)
K08X00S 2008 XS (arc=5 days, H=27.1 ~13m) from ARO (Dec. 7.25-26p3)
K08W61M 2008 WM61 (arc=13 days, H=26.7 ~15m) from ARO (Dec. 7.41-43p3)
K08W00K 2008 WK (arc=18 days, H=23.2 ~78m) from ARO (Dec. 7.42-43p6)
Observations of almost-small asteroids (21.7<H<=22.0)
K08UK1Z 2008 UZ201 (arc=41 days, H=21.8 ~148m) from MLS (Dec. 5.23-25p4 at V=20.7-22.1)
Observations of other objects
K08X02E 2008 XE2 (Q=4.160 AU, arc=3 days, H=19.0 ~537m) from ARO (Dec. 7.34-35p6)
K08X02A 2008 XA2 (arc=5 days, H=21.3 ~186m) from Madonna di Dossobuono Obs. (Dec. 8.86-87p3)
K08X01B 2008 XB1 (arc=5 days, H=20.9 ~224m) from Balzaretto Obs. (Dec. 7.83-85p2)
K08X00J 2008 XJ (Q=4.294 AU, arc=6 days, H=21.1 ~204m) from ARO (Dec. 7.28-30p3)
K08W61K 2008 WK61 (arc=16 days, H=20.7 ~245m) from ARO (Dec. 7.47p4)
K08W60L 2008 WL60 (arc=15 days, H=18.2 ~776m) from ARO (Dec. 7.35-36p5), Stia Obs. (Dec. 7.77-78p2), and PJMSO (Dec. 8.40p6)
K08W32M 2008 WM32 (i=39.1°, arc=16 days, H=19.8 ~371m) from ARO (Dec. 7.40p2)
K08W14C 2008 WC14 (Q=5.110 AU, arc=17 days, H=20.1 ~323m) from ARO (Dec. 7.49-50p3)
K08V14K 2008 VK14 (arc=30 days, H=19.3 ~467m) from ARO (Dec. 7.36-37p5) and PJMSO (Dec. 8.39p6)
K08V04U 2008 VU4 (Q=4.212 AU, arc=32 days, H=17.5 ~1.07 km) from Madonna di Dossobuono Obs. (Dec. 8.93p3) and Inastars Obs. (Dec. 9.00-01p3)
K08U07E 2008 UE7 (arc=44 days, H=20.4 ~282m) from ARO (Dec. 7.37p6), GiaGa Obs. (Dec. 8.05-06p2), PJMSO (Dec. 8.41-42p7), and Verona Obs. (Dec. 8.88-89p4)
K08S07V 2008 SV7 (arc=72 days, H=21.6 ~162m) from the Catalina Sky Survey (CSS) (Dec. 2.36-38p4) and ARO (Dec. 7.38p5)
K08S07P 2008 SP7 (Q=4.200 AU, arc=76 days, H=18.9 ~562m) from Madonna di Dossobuono Obs. (Dec. 8.88-89p3)
K08S01Q 2008 SQ1 (Q=4.682 AU, arc=2 opp, H=18.4 ~708m) from Madonna di Dossobuono Obs. (Dec. 8.85p3)
K08R26T 2008 RT26 (arc=90 days, H=19.4 ~446m) from MLS (Dec. 5.31-33p4)
K08M01N 2008 MN1 (i=37.2°, arc=162 days, H=20.1 ~323m) from the Siding Spring Survey (SSS) (Dec. 8.66-67p3)
K08M00Z 2008 MZ (Q=4.207 AU, arc=175 days, H=18.6 ~645m) from the Spacewatch 0.9m telescope (Dec. 6.30-35p3)
K08J14P 2008 JP14 (arc=2 opp, H=19.4 ~446m) from ARO (Dec. 7.31-33p3 at V=21.8-22.1)
K08E05V 2008 EV5 (arc=2 opp, H=19.9 ~355m) from SSS (Dec. 8.67p2 & 8.73-74p2)
K06V14B 2006 VB14 (arc=2 opp, H=18.6 ~645m) from ARO (Dec. 7.43p6)
K05X08H 2005 XH8 (arc=4 opp, H=18.0 ~851m) from ARO (Dec. 7.44-45p6)
K05T51Z 2005 TZ51 (arc=3 opp, H=17.9 ~891m) from San Vito Obs. (Dec. 8.86-87p3)
K04X14L 2004 XL14 (arc=3 opp, H=21.2 ~195m) from ARO (Dec. 7.46-47p6)
K01W25A 2001 WA25 (arc=4 opp, H=18.6 ~645m) from ARO (Dec. 7.43-44p6) and Mirasteilas Obs. (Dec. 8.95-97p3)
K01O84E 2001 OE84 (arc=3 opp, H=17.9 ~891m) from ARO (Dec. 7.47-48p4)
K01L05M 2001 LM5 (arc=3 opp, H=19.3 ~467m) from Madonna di Dossobuono Obs. (Dec. 8.85-86p3)
J99A10Q 1999 AQ10 (arc=4 opp, H=20.3 ~295m) from ARO (Dec. 7.49p3)
J9801 199801 2007 AE12 from Naef Obs. (Dec. 8.85-90p3)
J4386 194386 2001 VG5 from Crni Vrh Obs. (Dec. 7.96-99p4)
G2900 162900 2001 HG31 from GiaGa Obs. (Dec. 7.98-00p2)
D6849 136849 1998 CS1 from Naef Obs. (Dec. 8.93-95p2)
68350 68350 2001 MK3 from ARO (Dec. 7.50p6)
07358 7358 Oze (1995 YA3) from Naef Obs. (Dec. 8.92-94p2)
04257 4257 Ubasti (1987 QA) from SSS (Dec. 8.44-45p4)
01620 1620 Geographos (1951 RA) from San Vito Obs. (Dec. 8.87-88p3)

Observers on 9 December '08

Nineteen observing facilities appear in today's MPEC.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 23 in MPEC 2008-X70 -- 2008 XS, 2008 XK1, 2008 XJ, 2008 XE2, 2008 XC2, 2008 XB2, 2008 WM61, 2008 WM32, 2008 WL60, 2008 WK61, 2008 WK, 2008 WC14, 2008 VK14, 2008 UE7, 2008 SV7, 2008 JP14, 2006 VB14, 2005 XH8, 2004 XL14, 2001 WA25, 2001 OE84, 1999 AQ10, 68350
`A81`	Balzaretto Obs. in Italy, 2 in MPEC 2008-X70 -- 2008 XM1, 2008 XB1
`703`	Catalina Sky Survey in Arizona, 1 in MPEC 2008-X70 -- 2008 SV7
`106`	Crni Vrh Obs. in Slovenia, 1 in MPEC 2008-X70 -- 194386
`203`	GiaGa Obs. in Italy, 4 in MPEC 2008-X70 -- 2008 XM1, 2008 XC1, 2008 UE7, 162900
`J95`	Great Shefford Obs. in England, 1 in MPEC 2008-X70 -- 2008 WY94
`B15`	Inastars Obs. in Germany, 3 in MPEC 2008-X70 -- 2008 XM1, 2008 WB59, 2008 VU4
`560`	Madonna di Dossobuono Obs. in Italy, 7 in MPEC 2008-X70 -- 2008 XC1, 2008 XB2, 2008 XA2, 2008 VU4, 2008 SQ1, 2008 SP7, 2001 LM5
`B67`	Mirasteilas Obs. in Switzerland, 2 in MPEC 2008-X70 -- 2008 XC1, 2001 WA25
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2008-X70 -- 2008 XN, 2008 UZ201, 2008 RT26
`A13`	Naef Obs. in Switzerland, 3 in MPEC 2008-X70 -- 199801, 136849, 7358
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 4 in MPEC 2008-X70 -- 2008 XC1, 2008 WL60, 2008 VK14, 2008 UE7
`104`	San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2008-X70 -- 2008 XC1
`233`	San Vito Obs. in Italy, 2 in MPEC 2008-X70 -- 2005 TZ51, 1620
`E12`	Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2008-X70 -- 2008 MN1, 2008 EV5, 4257
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-X70 -- 2008 MZ
`A78`	Stia Obs. in Italy, 3 in MPEC 2008-X70 -- 2008 XM1, 2008 XC1, 2008 WL60
`B39`	Tradate Obs. in Italy, 2 in MPEC 2008-X70 -- 2008 XC1, 2008 WB59
`A48`	Verona Obs. in Italy, 3 in MPEC 2008-X70 -- 2008 XC1, 2008 WB59, 2008 UE7

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

Impact Risk Monitoring on 9 December '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 XC1	JPL Sentry	1422	2085-2088	2	4.0e-06	-4.91	-5.20	0	JPL: "Analysis based on 88 observations spanning 5.6254 days (2008-Dec-03.36799 to 2008-Dec-08.99337)." Diameter approximately 0.065 km. from mean, weighted H=23.6.
2008 XC1	NEODyS	1422	2085-2088	2	4.0e-06	-4.91	-5.20	0	NEODyS: "Based on 88 optical observations (of which 0 are rejected as outliers) from 2008/12/03.369 to 2008/12/08.994."

2008 WY94	JPL Sentry	1422	2052-2076	31	3.0e-04	-4.11	-4.16	0	JPL: "Analysis based on 30 observations spanning 7.2084 days (2008-Nov-29.54021 to 2008-Dec-06.748633)." Diameter approximately 0.025 km. from mean, weighted H=25.6.
2008 WY94	NEODyS	1422	2061-2089	38	1.9e-04	-4.32	-4.43	0	NEODyS: "Based on 32 optical observations (of which 3 are rejected as outliers) from 2008/11/29.541 to 2008/12/06.749."

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 9 December '08

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

1544	Noted that the NEOCP has become empty
1422	Noted that JPL Sentry has updated its 2008 WY94 risk assessment - see above Noted that NEODyS has updated its 2008 WY94 risk assessment - see above Noted that JPL Sentry has updated its 2008 XC1 risk assessment - see above Noted that NEODyS has updated its 2008 XC1 risk assessment - see above Grabbed MPEC 2008-X70 - Daily Orbit Update - see above

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