Contents on 10 December '08
- IAU Minor Planet Center
- NEOCP Activity -- none
- New MPECs -- one MPEC
- Observers -- eight 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 10 December '08
The MPC's NEO Confirmation Page is currently empty
The NEOCP is currently empty and hasn't been noted by The Tracking News as being active yet today (checked at 2358 UTC). It was last noted active yesterday.
New MPECs on 10 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 10 Dec. '08 >> MPEC 2008-X71 - "07:09 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K08X02U 2008 XU2 (small asteroid, arc=4 days, H=25.5 ~27m) from Great Shefford Obs. (Dec. 10.02p1 & 10.11p1)
- K08X01C 2008 XC1 (small asteroid, arc=7 days, H=23.6 ~65m) from GiaGa Obs. (Dec. 8.89p1 & 8.95p1), the Siding Spring Survey (SSS) (Dec. 9.54p2 & 9.59p2), and Great Shefford Obs. (Dec. 9.98p3)
- Observations of recently (no longer) risk-listed objects
- K08X02B 2008 XB2 (small asteroid, arc=5 days, H=25.1 ~32m) from Lumezzane Obs. (Dec. 6.87p3)
- K08X01M 2008 XM1 (almost small, Q=4.156 AU, arc=5 days, H=22.0 ~135m) from GiaGa Obs. (Dec. 8.90-93p2)
- K08W59B 2008 WB59 (arc=16 days, H=19.4 ~446m) from Lumezzane Obs. (Dec. 7.03p4)
- K08W14D 2008 WD14 (small asteroid, arc=18 days, H=22.8 ~93m) from Sormano Obs. (Dec. 8.90-93p4)
- Observations of other objects
- K08X02A 2008 XA2 (arc=5 days, H=21.3 ~186m) from Lumezzane Obs. (Dec. 6.90p4)
- K08X00P 2008 XP (arc=9 days, H=21.4 ~178m) from Great Shefford Obs. (Dec. 9.99-00p2)
- K08W60L 2008 WL60 (arc=15 days, H=18.2 ~776m) from Lumezzane Obs. (Dec. 7.04p4)
- K08V04U 2008 VU4 (Q=4.211 AU, arc=32 days, H=17.6 ~1.02 km) from Lumezzane Obs. (Dec. 7.11-12p3)
- K08U07E 2008 UE7 (arc=44 days, H=20.4 ~282m) from Grove Creek Obs. (Dec. 5.69p6, 7.69-70p3 & 8.67-68p8), North Obs. (Dec. 6.89p3), and Skylive Obs. (Dec. 6.90p6)
- K08M00Z 2008 MZ (Q=4.207 AU, arc=175 days, H=18.6 ~645m) from Lumezzane Obs. (Dec. 7.02-03p4)
- K08E05V 2008 EV5 (arc=2 opp, H=19.9 ~355m) from SSS (Dec. 9.65p1)
- K05C25V 2005 CV25 (arc=3 opp, H=19.5 ~426m) from Great Shefford Obs. (Dec. 9.81-82p2)
- K04X60Y 2004 XY60 (q=0.130 AU, arc=4 opp, H=18.9 ~562m) from SSS (Dec. 9.55-56p2)
- K02V94Y 2002 VY94 (Q=5.375 AU, arc=2 opp, H=16.7 ~1.55 km) from Lumezzane Obs. (Dec. 6.85-86p4)
- K01L05M 2001 LM5 (arc=3 opp, H=19.3 ~467m) from Lumezzane Obs. (Dec. 6.78p4)
- J9801 199801 2007 AE12 from Lumezzane Obs. (Dec. 7.05-06p4)
- J4386 194386 2001 VG5 from Lumezzane Obs. (Dec. 7.04-05p4)
- G2900 162900 2001 HG31 from Lumezzane Obs. (Dec. 6.78-79p4) and GiaGa Obs. (Dec. 8.92p1 & 8.97p1)
- F3306 153306 2001 JL1 from Lumezzane Obs. (Dec. 6.91p2)
- D6923 136923 1998 JH2 from Lumezzane Obs. (Dec. 7.07-08p4)
- D6849 136849 1998 CS1 from Lumezzane Obs. (Dec. 7.10-11p4)
- 53430 53430 1999 TY16 from Lumezzane Obs. (Dec. 6.91p4)
- 08035 8035 1992 TB from SSS (Dec. 9.60-63p4)
- 01943 1943 Anteros (1973 EC) from SSS (Dec. 9.70-71p3)
Observers on 10 December '08
Eight observing facilities appear in today's MPEC.
| Code | Observer / observatory |
|---|---|
| 203 | GiaGa Obs. in Italy, 3 in MPEC 2008-X71 -- 2008 XM1, 2008 XC1, 162900 |
| J95 | Great Shefford Obs. in England, 4 in MPEC 2008-X71 -- 2008 XU2, 2008 XP, 2008 XC1, 2005 CV25 |
| E16 | Grove Creek Obs. in New South Wales, 1 in MPEC 2008-X71 -- 2008 UE7 |
| 130 | Lumezzane Obs. in Italy, 15 in MPEC 2008-X71 -- 2008 XB2, 2008 XA2, 2008 WL60, 2008 WB59, 2008 VU4, 2008 MZ, 2002 VY94, 2001 LM5, 53430, 199801, 194386, 162900, 153306, 136923, 136849 |
| J69 | North Obs. in England, 1 in MPEC 2008-X71 -- 2008 UE7 |
| E12 | Siding Spring Survey (SSS) in New South Wales, 5 in MPEC 2008-X71 -- 2008 XC1, 2008 EV5, 2004 XY60, 8035, 1943 |
| B40 | Skylive Obs. in Italy, 1 in MPEC 2008-X71 -- 2008 UE7 |
| 587 | Sormano Obs. in Italy, 1 in MPEC 2008-X71 -- 2008 WD14 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 10 December '08
| 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 XU2 | NEODyS | 1449 | 2039 | 1 | 1.28e-07 | -7.00 | -7.00 | 0 | NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2008/12/06.262 to 2008/12/10.111." |
| JPL Sentry | 1448 | 2039 | 1 | 1.3e-07 | -7.00 | -7.00 | 0 | JPL: "Analysis based on 29 observations spanning 3.8487 days (2008-Dec-06.2616 to 2008-Dec-10.11029)." Diameter approximately 0.026 km. from mean, weighted H=25.5. | |
| 2008 XC1 | NEODyS | 1449 | 2085-2088 | 2 | 5.91e-06 | -4.75 | -4.95 | 0 | NEODyS: "Based on 97 optical observations (of which 1 are rejected as outliers) from 2008/12/03.369 to 2008/12/09.981." |
| JPL Sentry | 1448 | 2085-2088 | 2 | 7.1e-06 | -4.67 | -4.88 | 0 | JPL: "Analysis based on 97 observations spanning 6.6124 days (2008-Dec-03.36799 to 2008-Dec-09.98036)." Diameter approximately 0.065 km. from mean, weighted H=23.6. | |
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 10 December '08
Times are UTC for when items were noted or added by The Tracking News.
| 1449 | Noted that NEODyS has updated its 2008 XC1 risk assessment - see above Noted that NEODyS has updated its 2008 XU2 risk assessment - see above Grabbed MPEC 2008-X71 - Daily Orbit Update - see above |
| 1448 | Noted that JPL Sentry has updated its 2008 XC1 risk assessment - see above Noted that JPL Sentry has updated its 2008 XU2 risk assessment - see above |
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