Contents on 30 November '08
- IAU Minor Planet Center
- NEOCP Activity -- eleven listings: 1 new, 10 updated
- New MPECs -- two MPECs
- Observers -- ten observing facilities
- Impact Risk Monitoring -- four 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 30 November '08
The MPC's NEO Confirmation Page has 11 listings: 1 new, 10 updated
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and ten updated listings. Of these, eight were "one nighters."
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 30 November '08
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there have been two MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2008-W84 time-stamped "07:09 UT" - Daily Orbit Update - see below
- MPEC 2008-W85 time-stamped "15:44 UT" - 2005 XM4
MPEC 2008-W85 - "15:44 UT" - 2005 XM4
- K05X04M 2005 XM4 (H=19.6 ~407m) from the Siding Spring Survey (SSS) (Nov. 29.63-66p4 & 30.63p5)
<< DOU on 30 Nov. '08 >> MPEC 2008-W84 - "07:09 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K08W32W 2008 WW32 (arc=9 days, H=21.3 ~186m) from the Spacewatch 1.8m telescope (Nov. 30.11-12p3)
- K08W13Z 2008 WZ13 (arc=10 days, H=18.7 ~616m) from Spacewatch 1.8m (Nov. 30.19-20p3)
- K08W13Y 2008 WY13 (Q=4.199 AU, arc=10 days, H=21.6 ~162m) from Spacewatch 1.8m (Nov. 30.17p3)
- K08W02O 2008 WO2 (small asteroid, arc=2 days, H=29.8 ~4m) from Astronomical Research Obs. (ARO) (Nov. 22.11-14p3 at V=22.0-22.2)
- Observations of recently (no longer) risk-listed objects
- K08W59B 2008 WB59 (arc=6 days, H=19.4 ~446m) from Guidestar Obs. (Nov. 29.78-80p3)
- K08W32X 2008 WX32 (arc=9 days, H=19.0 ~537m) from Spacewatch 1.8m (Nov. 30.18-19p3)
- K08W32K 2008 WK32 (arc=9 days, H=19.5 ~426m) from Spacewatch 1.8m (Nov. 30.20-21p3)
- K08W01P 2008 WP1 (arc=7 days, H=20.4 ~282m) from ARO (Nov. 22.04-05p3)
- K08W00L 2008 WL (almost small, Q=4.493 AU, arc=9 days, H=21.8 ~148m) from ARO (Nov. 22.26p2)
- K08W00C 2008 WC (small asteroid, arc=8 days, H=26.5 ~17m) from ARO (Nov. 22.17p4)
- K08V01B 2008 VB1 (arc=27 days, H=20.6 ~257m) from Spacewatch 1.8m (Nov. 30.23-24p3)
- K04X03K 2004 XK3 (small asteroid, arc=2 opp, H=24.4 ~45m) from ARO (Nov. 22.19p4)
- Observations of small asteroids (H>22.0)
- K08W62T 2008 WT62 (arc=6 days, H=22.8 ~93m) from Spacewatch 1.8m (Nov. 30.12-13p3)
- K08W62S 2008 WS62 (arc=6 days, H=25.2 ~31m) from the Mt. Lemmon Survey (MLS) (Nov. 30.17-18p4)
- K08W14G 2008 WG14 (arc=7 days, H=24.7 ~39m) from ARO (Nov. 22.16-17p3)
- K08W14F 2008 WF14 (arc=9 days, H=24.9 ~35m) from ARO (Nov. 22.21-22p2) and Spacewatch 1.8m (Nov. 30.22p2)
- K08W02Q 2008 WQ2 (arc=2 days, H=24.3 ~47m) from ARO (Nov. 22.06-07p4)
- K08W00K 2008 WK (arc=9 days, H=23.2 ~78m) from ARO (Nov. 22.23-24p6)
- K08W00D 2008 WD (arc=7 days, H=25.9 ~22m) from ARO (Nov. 22.21p5)
- K08V03U 2008 VU3 (Q=4.027 AU, arc=23 days, H=23.4 ~71m) from ARO (Nov. 22.18-19p3)
- K08U99T 2008 UT99 (arc=31 days, H=24.4 ~45m) from Spacewatch 1.8m (Nov. 30.24-25p3)
- Observations of almost-small asteroids (21.7<H<=22.0)
- K08U03N 2008 UN3 (arc=29 days, H=22.0 ~135m) from ARO (Nov. 22.02p2)
- Observations of other objects
- K08W64L 2008 WL64 (i=41.7°, q=0.368 AU, arc=6 days, H=18.6 ~645m) from Guidestar Obs. (Nov. 29.73-77p3)
- K08W60H 2008 WH60 (arc=7 days, H=20.7 ~245m) from Winer Obs. (Nov. 30.16-19p3)
- K08W01Q 2008 WQ1 (arc=6 days, H=21.6 ~162m) from ARO (Nov. 22.03-04p5)
- K08W00N 2008 WN (arc=8 days, H=18.9 ~562m) from ARO (Nov. 22.20p3 & 26.17-19p4)
- K08V14K 2008 VK14 (arc=19 days, H=19.2 ~490m) from ARO (Nov. 22.27p4)
- K08V00F 2008 VF (arc=26 days, H=19.5 ~426m) from ARO (Nov. 26.34-35p4)
- K08U95C 2008 UC95 (arc=27 days, H=18.4 ~708m) from Desert Moon Obs. (Nov. 24.37-38p4)
- K08U91V 2008 UV91 (arc=33 days, H=20.0 ~339m) from Spacewatch 1.8m (Nov. 30.10-11p2)
- K08U90K 2008 UK90 (arc=34 days, H=18.8 ~589m) from Spacewatch 1.8m (Nov. 30.26-27p3)
- K08U07E 2008 UE7 (arc=35 days, H=20.5 ~269m) from ARO (Nov. 26.15-16p5), Iluro Obs. (Nov. 29.08p2), and Dresden Obs. (Nov. 29.91-93p4)
- K08U01U 2008 UU1 (arc=39 days, H=20.0 ~339m) from Spacewatch 1.8m (Nov. 30.15-16p3)
- K08TF7K 2008 TK157 (arc=65 days, H=20.5 ~269m) from Goodricke-Pigott Obs. (Nov. 24.16-19p2)
- K08R98M 2008 RM98 (Q=4.198 AU, arc=84 days, H=20.2 ~309m) from Spacewatch 1.8m (Nov. 30.09-10p3)
- K08O09B 2008 OB9 (Q=5.652 AU, arc=124 days, H=17.4 ~1.12 km) from Spacewatch 1.8m (Nov. 30.08p3)
- K08M00Z 2008 MZ (Q=4.207 AU, arc=165 days, H=18.6 ~645m) from ARO (Nov. 26.20-21p3)
- K08K05Z 2008 KZ5 (arc=177 days, H=20.0 ~339m) from ARO (Nov. 22.07-09p3)
- K06SL7Z 2006 SZ217 (arc=3 opp, H=17.3 ~1.17 km) from Iluro Obs. (Nov. 29.10p3)
- K05T51Z 2005 TZ51 (arc=3 opp, H=17.9 ~891m) from Dresden Obs. (Nov. 29.88-90p5)
- E2348 142348 2002 RX211 from Iluro Obs. (Nov. 29.13p2)
Observers on 30 November '08
Ten observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| H55 | Astronomical Research Obs. (ARO) in Illinois, 19 in MPEC 2008-W84 -- 2008 WQ2, 2008 WQ1, 2008 WP1, 2008 WO2, 2008 WN, 2008 WL, 2008 WK, 2008 WG14, 2008 WF14, 2008 WD, 2008 WC, 2008 VU3, 2008 VK14, 2008 VF, 2008 UN3, 2008 UE7, 2008 MZ, 2008 KZ5, 2004 XK3 |
| 448 | Desert Moon Obs. in New Mexico, 1 in MPEC 2008-W84 -- 2008 UC95 |
| 639 | Dresden Obs. in Germany, 2 in MPEC 2008-W84 -- 2008 UE7, 2005 TZ51 |
| 683 | Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-W84 -- 2008 TK157 |
| A17 | Guidestar Obs. in Germany, 2 in MPEC 2008-W84 -- 2008 WL64, 2008 WB59 |
| B19 | Iluro Obs. in Spain, 3 in MPEC 2008-W84 -- 2008 UE7, 2006 SZ217, 142348 |
| G96 | Mt. Lemmon Survey in Arizona, 1 in MPEC 2008-W84 -- 2008 WS62 |
| E12 | Siding Spring Survey in New South Wales, 1 in MPEC 2008-W85 -- 2005 XM4 |
| 291 | Spacewatch 1.8m telescope in Arizona, 14 in MPEC 2008-W84 -- 2008 WZ13, 2008 WY13, 2008 WX32, 2008 WW32, 2008 WT62, 2008 WK32, 2008 WF14, 2008 VB1, 2008 UV91, 2008 UU1, 2008 UT99, 2008 UK90, 2008 RM98, 2008 OB9 |
| 648 | Winer Obs. in Arizona, 1 in MPEC 2008-W84 -- 2008 WH60 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 30 November '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 WW32 | NEODyS | 1544 | R E M O V E D | - | |||||
| 2008 WZ13 | NEODyS | 1545 | 2023-2090 | 23 | 1.3e-06 | -2.74 | -3.18 | 0 | NEODyS: "Based on 40 optical observations (of which 0 are rejected as outliers) from 2008/11/20.276 to 2008/11/30.200." |
| JPL Sentry | 1544 | 2023-2108 | 54 | 1.4e-06 | -2.74 | -3.14 | 0 | JPL: "Analysis based on 40 observations spanning 9.9233 days (2008-Nov-20.27557 to 2008-Nov-30.19891)." Diameter approximately 0.583 km. from mean, weighted H=18.8. | |
| 2008 WY13 | JPL Sentry | 1544 | 2103 | 1 | 2.8e-09 | -6.85 | -6.85 | 0 | JPL: "Analysis based on 29 observations spanning 9.9001 days (2008-Nov-20.27393 to 2008-Nov-30.17406)." Diameter approximately 0.170 km. from mean, weighted H=21.6. |
| NEODyS | 1544 | R E M O V E D | - | ||||||
| 2008 WO2 | NEODyS | 1545 | 2065-2088 | 3 | 1.43e-06 | -8.38 | -8.42 | 0 | NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2008/11/20.219 to 2008/11/22.142." |
| JPL Sentry | 1544 | 2065-2096 | 9 | 6.0e-05 | -6.91 | -7.22 | 0 | JPL: "Analysis based on 27 observations spanning 1.9233 days (2008-Nov-20.21777 to 2008-Nov-22.14106)." Diameter approximately 0.004 km. from mean, weighted H=29.8. | |
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 30 November '08
Times are UTC for when items were noted or added by The Tracking News.
| 1658 | Grabbed MPEC 2008-W85 - 2005 XM4 - see above |
| 1545 | Noted that NEODyS has updated its 2008 WO2 risk assessment - see above Noted that NEODyS has updated its 2008 WZ13 risk assessment - see above |
| 1544 | Noted that JPL Sentry has updated its 2008 WO2 risk assessment - see above Noted that NEODyS has removed 2008 WW32 as an impact risk - see above Noted that JPL Sentry has updated its 2008 WY13 risk assessment - see above Noted that NEODyS has removed 2008 WY13 as an impact risk - see above Noted that JPL Sentry has updated its 2008 WZ13 risk assessment - see above Grabbed MPEC 2008-W84 - Daily Orbit Update - see above Noted that the NEOCP has become active |
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