The Geminid meteor shower, which peaks overnight tomorrow, is associated with 3200 Phaethon. This activity might be explained by heating from the rocky object's close approaches to the Sun, and Science@NASA reports that an unexpected brightening was observed in June 2009 when Phaethon was observed at perihelion using STEREO coronagraph imagery (path shown above, credit NASA, Jewitt, and Li). See more info here.
Contents on 12 December '10
- IAU Minor Planet Center
- NEOCP Activity -- eight listings: 4 new, 4 updated
- New MPECs -- seven MPECs
- Observers -- 26 observers
- Impact Risk Monitoring -- five objects
- Chronology
Resources:
- Consolidated Risk Tables - the CRT page
- Earth's Busy Neighborhood Traffic Report
- Ephemerides for risk-rated and nearby objects
- News image catalog
- 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 12 December '10
The MPC's NEO Confirmation Page has 8 listings: 4 new, 4 updated
When last checked at 2300 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and four updated listings. Of these, five were "one nighters." The Tracking News counted a total of sixteen listings on the NEOCP at some point on this day.
New MPECs on 12 December '10
Minor Planet Electronic Circulars
There were seven MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2010-X95 time-stamped "07:09 UT" - Daily Orbit Update - see below
- MPEC 2010-X96 time-stamped "11:51 UT" - 2010 XL56 - see below
- MPEC 2010-X97 time-stamped "11:59 UT" - 2010 XM56 - see below
- MPEC 2010-X98 time-stamped "12:04 UT" - 2010 XN56 - see below
- MPEC 2010-X99 time-stamped "12:08 UT" - 2010 XO56 - see below
- MPEC 2010-X100 time-stamped "12:27 UT" - 2010 XP56 - see below
- MPEC 2010-X101 time-stamped "23:42 UT" - Comet C/2010 X1 (Elenin)
MPEC 2010-X101 - "23:42 UT" - Comet C/2010 X1 (Elenin)
- CK10X010 C/2010 X1 (Elenin) (i=1.5°, q=5.152 AU, TP=2010 Apr. 1.80995 TT) from ISON-NM Obs. (Dec. 10.42-46p4), Majdanak Obs. (Dec. 10.99-00p4 & 11.98-99p3), Engelhardt Obs. Zelenchukskaya Station (Dec. 11.10-13p6), Tzec Maun Obs. Mayhill (Dec. 11.52-53p2 & 12.43-44p2), Malina River Obs. (Dec. 12.17-19p3), Schiaparelli Obs. (Dec. 12.19-20p2), Magdalena Ridge Obs. (MRO) (Dec. 12.47-49p4), and H. Sato via RAS Obs. Mayhill (Dec. 12.51p3)
MPEC 2010-X100 - "12:27 UT" - 2010 XP56
- K10X56P 2010 XP56 (small asteroid, H=23.3 ~74m) from the Mt. Lemmon Survey (MLS) (Dec. 11.32-34p4 & 11.42-43p4) and MRO (Dec. 12.29-32p4)
MPEC 2010-X99 - "12:08 UT" - 2010 XO56
- K10X56O 2010 XO56 (risk-listed, i=39.8°, H=20.3 ~295m) from LINEAR (Dec. 11.47-51p4), Schiaparelli Obs. (Dec. 12.01-03p3), Malina River Obs. (Dec. 12.07-08p3), Great Shefford Obs. (Dec. 12.21-22p3), and MRO (Dec. 12.45-47p4)
MPEC 2010-X98 - "12:04 UT" - 2010 XN56
- K10X56N 2010 XN56 (small asteroid, H=24.5 ~43m) from MLS (Dec. 10.38-47p7 & 12.44-45p4) and MRO (Dec. 10.45-48p5)
MPEC 2010-X97 - "11:59 UT" - 2010 XM56
- K10X56M 2010 XM56 (small asteroid, Earth MOID=0.0 LD, H=24.9 ~35m) from LINEAR (Dec. 10.27-32p4), MLS (Dec. 11.36-38p3), Schiaparelli Obs. (Dec. 11.96-97p3), the Spacewatch 1.8m telescope (Dec. 12.33p3), and MRO (Dec. 12.38-40p4) This object will be coming within ten lunar distances (LD) of Earth, reaching 5.8 LD on 19 Dec.
MPEC 2010-X96 - "11:51 UT" - 2010 XL56
- K10X56L 2010 XL56 (H=21.2 ~195m) from MLS (Dec. 10.15-18p3), Spacewatch 1.8m (Dec. 12.06-07p3), and MRO (Dec. 12.24-27p4)
<< DOU on 12 Dec. '10 >> MPEC 2010-X95 - "07:09 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K10X25C 2010 XC25 (arc=3 days, H=20.5 ~269m) from Spacewatch 1.8m (Dec. 11.43-44p3)
- K10X00U 2010 XU (small asteroid, arc=11 days, H=25.3 ~29m) from Spacewatch 1.8m (Dec. 11.31-32p3 & 12.09-10p3 at V=21.4-22.1)
- K10X00N 2010 XN (small asteroid, arc=10 days, H=24.5 ~43m) from MLS (Dec. 11.23-25p4) and Spacewatch 1.8m (Dec. 11.33p2)
- K10W09C 2010 WC9 (small asteroid, arc=10 days, H=23.5 ~68m) from David Tholen's team on Mauna Kea (Dec. 7.23p3)
- Observations of recently (no longer) risk-listed objects
- K10X25D 2010 XD25 (arc=3 days, H=20.7 ~245m) from Spacewatch 1.8m (Dec. 11.45-46p3)
- K10X11C 2010 XC11 (q=0.383 AU, Q=4.547 AU, arc=8 days, H=18.4 ~708m) from Astronomical Research Obs. Westfield (Dec. 8.26-28p3)
- K10W09D 2010 WD9 from ARO Westfield (Dec. 8.47-49p4)
- K10W09A 2010 WA9 (small asteroid, arc=11 days, H=25.6 ~26m) from Castelmartini Obs. (Dec. 10.94p3)
- K10W08Z 2010 WZ8 (arc=12 days, H=20.4 ~282m) from ARO Westfield (Dec. 8.49-50p5) and Spacewatch 1.8m (Dec. 11.51-52p3)
- K10W08T 2010 WT8 (arc=15 days, H=21.5 ~170m) from Spacewatch 1.8m (Dec. 12.13-14p3 at V=22.4-8)
- F3814 153814 2001 WN5 from LINEAR (Dec. 11.07-12p5)
- Observations of small asteroids (H>22.0)
- K10X25G 2010 XG25 (arc=2 days, H=24.9 ~35m) from Spacewatch 1.8m (Dec. 11.40-41p3)
- K10X24A 2010 XA24 (arc=5 days, H=24.8 ~37m) from Sormano Obs. (Dec. 11.96-97p3) and Great Shefford Obs. (Dec. 12.12-13p4)
- K10X11J 2010 XJ11 (arc=6 days, H=23.9 ~56m) from ARO Westfield (Dec. 9.15-17p5), MLS (Dec. 11.26-28p4), and Spacewatch 1.8m (Dec. 11.28-31p3)
- K10X11E 2010 XE11 (arc=8 days, H=22.9 ~89m) from ARO Westfield (Dec. 8.31-32p6), Sormano Obs. (Dec. 11.86-87p3), and Peschiera del Garda Obs. (Dec. 11.93-95p4)
- K10X10T 2010 XT10 (arc=7 days, H=26.5 ~17m) from ARO Westfield (Dec. 8.23-24p4) and the Catalina Sky Survey (CSS) (Dec. 11.26-27p4)
- K10X10R 2010 XR10 (arc=9 days, H=23.5 ~68m) from Spacewatch 1.8m (Dec. 11.39p3)
- K10X00Y 2010 XY (arc=7 days, H=24.3 ~47m) from ARO Westfield (Dec. 8.25-26p4)
- K10X00M 2010 XM (arc=11 days, H=24.5 ~43m) from Spacewatch 1.8m (Dec. 11.34-35p3 at V=21.6-22.1 & 12.18-19p3 at V=22.3)
- K10W08U 2010 WU8 (arc=14 days, H=24.2 ~49m) from Spacewatch 1.8m (Dec. 12.17-18p3)
- K10W07R 2010 WR7 (arc=13 days, H=23.4 ~71m) from ARO Westfield (Dec. 8.19-20p3)
- K10W00T 2010 WT (arc=16 days, H=23.4 ~71m) from Spacewatch 1.8m (Dec. 11.42p3 at V=21.3-22.2 & 12.20-21p3 at V=21.5-22.0)
- K10V00O 2010 VO (arc=36 days, H=23.9 ~56m) from Tholen team/Mauna Kea (Dec. 7.24p3 at R=22.8-23.5)
- K10U06X 2010 UX6 (Q=4.063 AU, arc=32 days, H=23.0 ~85m) from Verona Obs. (Nov. 10.97p4)
- Observations of other objects
- K10X45R 2010 XR45 from LINEAR (Dec. 10.14-18p4)
- K10X11G 2010 XG11 from ARO Westfield (Dec. 8.21-23p3)
- K10X10O 2010 XO10 (arc=9 days, H=20.2 ~309m) from ARO Westfield (Dec. 8.35-36p5), CSS (Dec. 11.29-30p3), Sormano Obs. (Dec. 11.95p3), and Peschiera del Garda Obs. (Dec. 11.98-00p3)
- K10X03J 2010 XJ3 (arc=9 days, H=21.3 ~186m) from GiaGa Obs. (Dec. 11.94p1 & 12.03p1)
- K10X03G 2010 XG3 (arc=9 days, H=21.7 ~155m) from ARO Westfield (Dec. 8.30-31p4) and Castelmartini Obs. (Dec. 10.98-99p3)
- K10X00Z 2010 XZ (Q=4.698 AU, arc=10 days, H=20.3 ~295m) from Spacewatch 1.8m (Dec. 11.37-38p3 & 12.11-12p3)
- K10W08P 2010 WP8 (arc=2 opp, H=18.2 ~776m) from Castelmartini Obs. (Dec. 10.90-91p3)
- K10W07Q 2010 WQ7 (arc=15 days, H=18.1 ~812m) from GiaGa Obs. (Dec. 11.92p1 & 11.96p1)
- K10W00L 2010 WL (arc=22 days, H=20.0 ~339m) from ARO Westfield (Dec. 8.36-38p5)
- K10W00J 2010 WJ (arc=24 days, H=18.2 ~776m) from LINEAR (Dec. 11.32-36p4)
- K10W00H 2010 WH (arc=22 days, H=19.2 ~490m) from ARO Westfield (Dec. 8.33-34p3)
- K10VJ0Y 2010 VY190 (arc=208 days, H=19.2 ~490m) from LINEAR (Dec. 11.13-18p5)
- K10V01L 2010 VL1 (Q=4.287 AU, arc=38 days, H=20.4 ~282m) from CSS (Dec. 11.32-35p4)
- K10T47C 2010 TC47 (arc=65 days, H=20.4 ~282m) from LINEAR (Dec. 11.19-24p5)
- K10NB7W 2010 NW117 (arc=2 opp, H=18.1 ~812m) from WISE (Dec. 8.23p1, 8.37p1, 8.50p1, 8.63p1, 8.76p1, 8.90p1, 9.03p1, 9.16p1, 9.29p1, 9.42p1, 9.56p1, 9.95p1 & 10.09p1)
- K10M01F 2010 MF1 (arc=177 days, H=19.7 ~389m) from Spacewatch 1.8m (Dec. 12.08p3 at V=21.8-22.1)
- K10L86F 2010 LF86 (arc=183 days, H=17.2 ~1.23 km) from Castelmartini Obs. (Dec. 10.85p3) and Peschiera del Garda Obs. (Dec. 11.83-88p3)
- K10K00H 2010 KH (Q=4.283 AU, arc=210 days, H=19.8 ~371m) from Spacewatch 1.8m (Dec. 12.25-26p3)
- K10J33L 2010 JL33 (Q=4.634 AU, arc=4 opp, H=17.9 ~891m) from Madonna di Dossobuono Obs. (Dec. 11.74-75p4), Starry Wanderer Obs. (Dec. 11.76-77p10), Verona Obs. (Dec. 11.77p4), and Peschiera del Garda Obs. (Dec. 11.78-80p8)
- K08A28T 2008 AT28 (arc=2 opp, H=18.5 ~676m) from WISE (Dec. 6.11p2, 6.25p1, 6.51p1, 6.64p1, 7.04p2, 7.17p1, 7.30p1, 7.44p1, 7.57p1, 7.70p1, 8.10p1, 8.23p1, 8.36p1, 8.50p1 & 8.63p1)
- K07E88M 2007 EM88 (arc=3 opp, H=19.4 ~446m) from CSS (Dec. 11.40-42p4)
- K06W02Y 2006 WY2 (arc=5 opp, H=18.5 ~676m) from CSS (Dec. 11.36-39p4)
- K06V14B 2006 VB14 (arc=3 opp, H=18.5 ~676m) from Mataro Obs. (Dec. 10.89p4), CSS (Dec. 11.25-27p4), Peschiera del Garda Obs. (Dec. 11.89-90p7), and Starry Wanderer Obs. (Dec. 12.11p4)
- K06G02W 2006 GW2 (arc=3 opp, H=20.3 ~295m) from Spacewatch 1.8m (Dec. 11.50-51p3)
- K04B01W 2004 BW1 (arc=2 opp, H=18.9 ~562m) from CSS (Dec. 11.40-42p4)
- K03SM2V 2003 SV222 (arc=4 opp, H=17.6 ~1.02 km) from MLS (Dec. 11.29-31p4)
- K02B00N 2002 BN (arc=3 opp, H=20.4 ~282m) from Spacewatch 1.8m (Dec. 11.49-50p3)
- K01X01F 2001 XF1 (arc=6 opp, H=19.2 ~490m) from LINEAR (Dec. 11.22-25p3)
- K00A93Z 2000 AZ93 (arc=4 opp, H=20.6 ~257m) from Spacewatch 1.8m (Dec. 11.48p3) and LINEAR (Dec. 11.48-50p3)
- P6670 256670 2007 XT58 from MLS (Dec. 11.44-46p3)
- O9595 249595 1997 GH28 from LINEAR (Dec. 11.06-11p4)
- O8590 248590 2006 CS from WISE (Dec. 8.95p1, 9.02p1, 9.08p2 & 9.15p1)
- L0012 210012 2006 KT1 from LINEAR (Dec. 11.26-30p3)
- H0086 170086 2002 XR14 from LINEAR (Dec. 11.40-45p4)
- G2781 162781 2000 XL44 from CSS (Dec. 11.44-46p4)
- E3381 143381 2003 BC21 from LINEAR (Dec. 11.06-11p10)
- E1498 141498 2002 EZ16 from GiaGa Obs. (Dec. 11.93p1 & 11.97p1)
- D7052 137052 1998 VO33 from CSS (Dec. 11.44-46p4)
- 53426 53426 1999 SL5 from Naef Obs. (Dec. 11.80-82p2)
- 23183 23183 2000 OY21 from WISE (Dec. 6.16p1, 6.49p1, 6.55p1, 6.62p1, 6.75p1, 6.82p2, 6.88p1, 7.02p1 & 7.15p1)
- 10165 10165 1995 BL2 from WISE (Dec. 7.98p1, 8.24p1, 8.38p1, 8.51p1, 8.77p1, 8.84p1, 8.90p1, 8.97p1, 9.04p1, 9.17p1 & 9.30p2)
- 06569 6569 Ondaatje (1993 MO) from CSS (Dec. 11.32-35p4)
- 05869 5869 Tanith (1988 VN4) from Starhoo Obs. (Nov. 28.11-16p6)
- 04688 4688 1980 WF from LINEAR (Dec. 11.12-17p5)
- 03838 3838 Epona (1986 WA) from LINEAR (Dec. 11.12-17p5)
Observers on 12 December '10
A total of 26 observers appeared in this day's MPECs.
| Code | Observer / observatory |
|---|---|
| H21 | Astronomical Research Obs. Westfield in Illinois, 13 in MPEC 2010-X95 -- 2010 XY, 2010 XT10, 2010 XO10, 2010 XJ11, 2010 XG3, 2010 XG11, 2010 XE11, 2010 XC11, 2010 WZ8, 2010 WR7, 2010 WL, 2010 WH, 2010 WD9 |
| 160 | Castelmartini Obs. in Italy, 4 in MPEC 2010-X95 -- 2010 XG3, 2010 WP8, 2010 WA9, 2010 LF86 |
| 703 | Catalina Sky Survey (CSS) in Arizona, 10 in MPEC 2010-X95 -- 2010 XT10, 2010 XO10, 2010 VL1, 2007 EM88, 2006 WY2, 2006 VB14, 2004 BW1, 162781, 137052, 6569 |
| 114 | Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2010-X101 -- C/2010 X1 |
| 203 | GiaGa Obs. in Italy, 3 in MPEC 2010-X95 -- 2010 XJ3, 2010 WQ7, 141498 |
| J95 | Great Shefford Obs. in England, 2 in MPECs 2010-X95 & 2010-X99 -- 2010 XO56, 2010 XA24 |
| H15 | ISON-NM Obs. in New Mexico, 1 in MPEC 2010-X101 -- C/2010 X1 |
| 704 | LINEAR in New Mexico, 15 in MPECs 2010-X95, 2010-X97 & 2010-X99 -- 2010 XR45, 2010 XO56, 2010 XM56, 2010 WJ, 2010 VY190, 2010 TC47, 2001 XF1, 2000 AZ93, 249595, 210012, 170086, 153814, 143381, 4688, 3838 |
| 560 | Madonna di Dossobuono Obs. in Italy, 1 in MPEC 2010-X95 -- 2010 JL33 |
| H01 | Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPECs 2010-X96, 2010-X97, 2010-X98, 2010-X99, 2010-X100 & 2010-X101 -- 2010 XP56, 2010 XO56, 2010 XN56, 2010 XM56, 2010 XL56, C/2010 X1 |
| 188 | Majdanak Obs. in Uzbekistan, 1 in MPEC 2010-X101 -- C/2010 X1 |
| B90 | Malina River Obs. in Italy, 2 in MPECs 2010-X99 & 2010-X101 -- 2010 XO56, C/2010 X1 |
| A06 | Mataro Obs. in Spain, 1 in MPEC 2010-X95 -- 2006 VB14 |
| 5682 | David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2010-X95 -- 2010 WC9, 2010 VO |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2010-X95, 2010-X96, 2010-X97, 2010-X98 & 2010-X100 -- 2010 XP56, 2010 XN56, 2010 XN, 2010 XM56, 2010 XL56, 2010 XJ11, 2003 SV222, 256670 |
| A13 | Naef Obs. in Switzerland, 1 in MPEC 2010-X95 -- 53426 |
| A53 | Peschiera del Garda Obs. in Italy, 5 in MPEC 2010-X95 -- 2010 XO10, 2010 XE11, 2010 LF86, 2010 JL33, 2006 VB14 |
| H06| | H. Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2010-X101 -- C/2010 X1 |
| 204 | Schiaparelli Obs. in Italy, 3 in MPECs 2010-X97, 2010-X99 & 2010-X101 -- 2010 XO56, 2010 XM56, C/2010 X1 |
| 587 | Sormano Obs. in Italy, 3 in MPEC 2010-X95 -- 2010 XO10, 2010 XE11, 2010 XA24 |
| 291 | Spacewatch 1.8m telescope in Arizona, 20 in MPECs 2010-X95, 2010-X96 & 2010-X97 -- 2010 XZ, 2010 XU, 2010 XR10, 2010 XN, 2010 XM56, 2010 XM, 2010 XL56, 2010 XJ11, 2010 XG25, 2010 XD25, 2010 XC25, 2010 WZ8, 2010 WU8, 2010 WT8, 2010 WT, 2010 MF1, 2010 KH, 2006 GW2, 2002 BN, 2000 AZ93 |
| I28 | Starhoo Obs. in Massachusetts, 1 in MPEC 2010-X95 -- 5869 |
| C36 | Starry Wanderer Obs., 2 in MPEC 2010-X95 -- 2010 JL33, 2006 VB14 |
| H10 | Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2010-X101 -- C/2010 X1 |
| A48 | Verona Obs. in Italy, 2 in MPEC 2010-X95 -- 2010 UX6, 2010 JL33 |
| C51 | WISE in Earth polar orbit, 5 in MPEC 2010-X95 -- 2010 NW117, 2008 AT28, 248590, 23183, 10165 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 12 December '10
| 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 |
| 2010 XO56 | JPL Sentry | 1727 | 2027-2105 | 28 | 9.0e-08 | -4.38 | -4.58 | 0 | JPL: "Analysis based on 17 observations spanning 1.0032 days (2010-Dec-11.46753 to 2010-Dec-12.47072)." Diameter approximately 0.280 km. from mean, weighted H=20.4. |
| 2010 XC25 | JPL Sentry | 1727 | 2024-2109 | 67 | 2.0e-05 | -2.16 | -2.73 | 0 | JPL: "Analysis based on 28 observations spanning 3.0663 days (2010-Dec-08.37716 to 2010-Dec-11.44347)." Diameter approximately 0.269 km. from mean, weighted H=20.5. |
| NEODyS | 1727 | 2024-2090 | 59 | 1.67e-05 | -2.23 | -2.76 | 0 | NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2010-12-08.378 to 2010-12-11.444." | |
| 2010 XU | JPL Sentry | 1727 | 2088-2092 | 2 | 1.5e-09 | -9.35 | -9.52 | 0 | JPL: "Analysis based on 64 observations spanning 10.999 days (2010-Dec-01.09924 to 2010-Dec-12.09809)." Diameter approximately 0.029 km. from mean, weighted H=25.3. |
| NEODyS | 1727 | 2072-2088 | 2 | 2.54e-10 | -10.12 | -10.15 | 0 | NEODyS: "Based on 64 optical observations (of which 0 are rejected as outliers) from 2010-12-01.100 to 2010-12-12.099." | |
| 2010 XN | JPL Sentry | 1727 | 2078 | 2 | 1.0e-09 | -8.95 | -9.20 | 0 | JPL: "Analysis based on 29 observations spanning 10.023 days (2010-Dec-01.30772 to 2010-Dec-11.33026)." Diameter approximately 0.042 km. from mean, weighted H=24.5. |
| 2010 WC9 | JPL Sentry | 1727 | 2027-2109 | 21 | 4.5e-06 | -4.28 | -4.35 | 0 | JPL: "Analysis based on 33 observations spanning 10.033 days (2010-Nov-30.08059 to 2010-Dec-10.11346)." Diameter approximately 0.069 km. from mean, weighted H=23.5. |
| NEODyS | 1727 | 2027-2087 | 21 | 3.92e-06 | -4.30 | -4.36 | 0 | NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2010-11-30.081 to 2010-12-10.114." | |
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 12 December '10
Times are UTC for when items were noted or added by The Tracking News.
| 0101 12/13 | Grabbed MPEC 2010-X101 - Comet C/2010 X1 (Elenin) - see above |
| 1727 | Noted that JPL Sentry has updated its 2010 WC9 risk assessment - see above Noted that NEODyS has updated its 2010 WC9 risk assessment - see above Noted that JPL Sentry has updated its 2010 XC25 risk assessment - see above Noted that NEODyS has updated its 2010 XC25 risk assessment - see above Noted that JPL Sentry has reposted 2010 XN as an impact risk - see above Noted that JPL Sentry has posted 2010 XO56 as an impact risk - see above Noted that JPL Sentry has updated its 2010 XU risk assessment - see above Noted that NEODyS has updated its 2010 XU risk assessment - see above Grabbed MPEC 2010-X95 - Daily Orbit Update - see above Grabbed MPEC 2010-X96 - 2010 XL56 - see above Grabbed MPEC 2010-X97 - 2010 XM56 - see above Grabbed MPEC 2010-X98 - 2010 XN56 - see above Grabbed MPEC 2010-X99 - 2010 XO56 - see above Grabbed MPEC 2010-X100 - 2010 XP56 - see above |
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