Contents on 29 December '08
- IAU Minor Planet Center
- NEOCP Activity -- five listings: 2 new, 3 updated
- New MPECs -- three MPECs
- Observers -- 25 observing facilities
- Impact Risk Monitoring -- one object
- 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 29 December '08
The MPC's NEO Confirmation Page has 5 listings: 2 new, 3 updated
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and three updated listings. Of these, three 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 29 December '08
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there have been three MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2008-Y61 time-stamped "07:07 UT" - Daily Orbit Update - see below
- MPEC 2008-Y62 time-stamped "19:11 UT" - 2008 YG26 - see below
- MPEC 2008-Y63 time-stamped "23:41 UT" - 2008 YM27
MPEC 2008-Y63 - "23:41 UT" - 2008 YM27
- K08Y27M 2008 YM27 (small asteroid, H=23.4 ~71m) was discovered at 0452 UT on 29 Dec. by LINEAR, which observed it at Dec. 29.20-25p5. The discovery was confirmed by Starkenburg Obs. (Dec. 29.93-94p3) and Remanzacco Obs. (Dec. 29.95-96p2).
MPEC 2008-Y62 - "19:11 UT" - 2008 YG26
- K08Y26G 2008 YG26 (H=21.3 ~186m) was discovered at 0402 UT on 29 Dec. by the Catalina Sky Survey (CSS), which observed it at Dec. 29.17-22p8. The discovery was confirmed by Magdalena Ridge Obs. (MRO) (Dec. 29.22-24p6), Sabino Canyon Obs. (Dec. 29.30-31p3), Starkenburg Obs. (Dec. 29.74-77p4), and Guidestar Obs. (Dec. 29.77-78p3).
<< DOU on 29 Dec. '08 >> MPEC 2008-Y61 - "07:07 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K08Y03C 2008 YC3 (small asteroid, arc=7 days, H=25.5 ~27m) from Great Shefford Obs. (Dec. 28.74p2) and MRO (Dec. 29.12-13p4)
- Observations of recently (no longer) risk-listed objects
- K08X02P 2008 XP2 (arc=23 days, H=18.5 ~676m) from Petit Jean Mtn. South Obs. (PJMSO) (Dec. 28.41-42p6)
- K08W63Q 2008 WQ63 (arc=36 days, H=20.1 ~323m) from Hamamatsu-Yuto Obs. (Dec. 27.78-80p7), PJMSO (Dec. 28.37-38p7), Rodeo Obs. (Dec. 28.46-47p5), and Desert Moon Obs. (Dec. 28.47-48p5)
- Observations of almost-small asteroids (21.7<H<=22.0)
- K08W00L 2008 WL (Q=4.485 AU, arc=40 days, H=21.8 ~148m) from Guidestar Obs. (Dec. 28.84-87p3)
- Observations of other objects
- K08Y03F 2008 YF3 (arc=8 days, H=21.2 ~195m) from Guidestar Obs. (Dec. 28.78-82p3)
- K08Y03E 2008 YE3 (arc=6 days, H=20.7 ~245m) from Desert Moon Obs. (Dec. 28.43-45p3)
- K08Y02K 2008 YK2 (arc=7 days, H=19.5 ~426m) from Lumezzane Obs. (Dec. 27.11-12p4) and Hamamatsu-Yuto Obs. (Dec. 27.71-72p3)
- K08Y00A 2008 YA (Q=4.854 AU, arc=12 days, H=17.8 ~933m) from the Siding Spring Survey (SSS) (Dec. 28.51p2)
- K08X02V 2008 XV2 (arc=23 days, H=20.3 ~295m) from Lumezzane Obs. (Dec. 27.08-09p3) and Naef Obs. (Dec. 28.81-83p2)
- K08X02E 2008 XE2 (arc=25 days, H=19.2 ~490m) from PJMSO (Dec. 28.33-34p6), Desert Moon Obs. (Dec. 28.39-41p5), and Mirasteilas Obs. (Dec. 28.00-01p3)
- K08X00P 2008 XP (arc=28 days, H=21.4 ~178m) from Linz Obs. (Dec. 28.83-84p2 & 28.96p2)
- K08W60L 2008 WL60 (arc=34 days, H=18.1 ~812m) from Hamamatsu-Yuto Obs. (Dec. 27.70-71p3)
- K08W02N 2008 WN2 (arc=64 days, H=20.8 ~234m) from Lumezzane Obs. (Dec. 26.93-94p3)
- K08V01B 2008 VB1 (arc=56 days, H=20.6 ~257m) from the Spacewatch 1.8m telescope (Dec. 29.26-27p3)
- K08U95C 2008 UC95 (arc=60 days, H=18.5 ~676m) from PJMSO (Dec. 28.36-37p6)
- K08U00C 2008 UC (arc=70 days, H=19.0 ~537m) from Lumezzane Obs. (Dec. 26.81-82p4) and Drebach Obs. (Dec. 28.73-74p3)
- K08T02Q 2008 TQ2 (arc=86 days, H=20.9 ~224m) from Desert Moon Obs. (Dec. 28.50-54p3)
- K08S82J 2008 SJ82 (arc=93 days, H=20.6 ~257m) from Spacewatch 1.8m (Dec. 29.20-21p3 at V=22.1)
- K08S82H 2008 SH82 (arc=94 days, H=21.3 ~186m) from Hamamatsu-Yuto Obs. (Dec. 27.58p1 & 27.64-66p2) and Drebach Obs. (Dec. 28.76-77p12)
- K08S01Q 2008 SQ1 (Q=4.682 AU, arc=2 opp, H=18.5 ~676m) from Drebach Obs. (Dec. 28.75p3)
- K08Q03T 2008 QT3 (arc=126 days, H=18.7 ~616m) from Drebach Obs. (Dec. 28.71-72p3) and Inastars Obs. (Dec. 28.78-79p5)
- K08M05B 2008 MB5 (arc=181 days, H=19.1 ~513m) from PJMSO (Dec. 28.38-39p7)
- K08E05V 2008 EV5 (arc=2 opp, H=20.1 ~323m) from S-Gravenwezel Obs. (Dec. 28.02-10p22) and PJMSO (Dec. 28.32-33p8)
- K07V08L 2007 VL8 (arc=2 opp, H=21.2 ~195m) from Naef Obs. (Dec. 28.76-78p2)
- K05B00C 2005 BC (arc=2 opp, H=18.0 ~851m) from PJMSO (Dec. 28.39-40p5)
- K04X60Y 2004 XY60 (q=0.130 AU, arc=4 opp, H=18.9 ~562m) from SSS (Dec. 28.55p2)
- K04L03V 2004 LV3 (arc=2 opp, H=18.8 ~589m) from Hamamatsu-Yuto Obs. (Dec. 28.39-40p3), Dresden Obs. (Dec. 28.82-83p6), and Thompsonville Obs. (Dec. 29.04-05p6)
- K04D02G 2004 DG2 (arc=5 opp, H=18.7 ~616m) from Inastars Obs. (Dec. 28.90p4)
- K02X90P 2002 XP90 (arc=3 opp, H=18.5 ~676m) from PJMSO (Dec. 28.42-43p5)
- K01W01T 2001 WT1 (arc=3 opp, H=19.7 ~389m) from Naef Obs. (Dec. 28.86-88p2)
- J99Y03F 1999 YF3 (arc=4 opp, H=18.3 ~741m) from Lumezzane Obs. (Dec. 26.83p3)
- J94A01W 1994 AW1 (arc=3 opp, H=17.6 ~1.02 km) from Inastars Obs. (Dec. 28.83p4)
- K0754 200754 2001 WA25 from Lumezzane Obs. (Dec. 27.02p4)
- G3683 163683 2002 YP2 from Herrenberg Obs. (Dec. 28.84-86p4) and Inastars Obs. (Dec. 28.00p3)
- G2900 162900 2001 HG31 from Thompsonville Obs. (Dec. 29.02-03p6)
- G2361 162361 2000 AF6 from Lumezzane Obs. (Dec. 27.04-05p4) and Inastars Obs. (Dec. 28.98p3)
- F3201 153201 2000 WO107 from Herrenberg Obs. (Dec. 28.87-89p7)
- E1765 141765 2002 MP3 from Naef Obs. (Dec. 28.90-94p3)
- D7805 137805 1999 YK5 from Inastars Obs. (Dec. 28.85-86p3)
- 89355 89355 2001 VS78 from Lumezzane Obs. (Dec. 27.01p4)
- 52762 52762 1998 MT24 from Lumezzane Obs. (Dec. 27.07p4)
- 36236 36236 1999 VV from Inastars Obs. (Dec. 28.87p3)
- 02368 2368 Beltrovata (1977 RA) from Lumezzane Obs. (Dec. 27.09-10p4)
- 01980 1980 Tezcatlipoca (1950 LA) from Thompsonville Obs. (Dec. 29.07-08p6)
- 01627 1627 Ivar (1929 SH) from Deep Sky Obs. (Dec. 27.80-81p6)
Observers on 29 December '08
A total of 25 observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| 703 | Catalina Sky Survey in Arizona, 1 in MPEC 2008-Y62 -- 2008 YG26 |
| B60 | Deep Sky Obs. in Germany, 1 in MPEC 2008-Y61 -- 1627 |
| 448 | Desert Moon Obs. in New Mexico, 4 in MPEC 2008-Y61 -- 2008 YE3, 2008 XE2, 2008 WQ63, 2008 TQ2 |
| 113 | Drebach Obs. in Germany, 4 in MPEC 2008-Y61 -- 2008 UC, 2008 SQ1, 2008 SH82, 2008 QT3 |
| 639 | Dresden Obs. in Germany, 1 in MPEC 2008-Y61 -- 2004 LV3 |
| J95 | Great Shefford Obs. in England, 1 in MPEC 2008-Y61 -- 2008 YC3 |
| A17 | Guidestar Obs. in Germany, 3 in MPECs 2008-Y61 & 2008-Y62 -- 2008 YG26, 2008 YF3, 2008 WL |
| 379 | Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2008-Y61 -- 2008 YK2, 2008 WQ63, 2008 WL60, 2008 SH82, 2004 LV3 |
| 240 | Herrenberg Obs. in Germany, 2 in MPEC 2008-Y61 -- 163683, 153201 |
| B15 | Inastars Obs. in Germany, 7 in MPEC 2008-Y61 -- 2008 QT3, 2004 DG2, 1994 AW1, 36236, 163683, 162361, 137805 |
| 704 | LINEAR in New Mexico, 1 in MPEC 2008-Y63 -- 2008 YM27 |
| 540 | Linz Obs. in Austria, 1 in MPEC 2008-Y61 -- 2008 XP |
| 130 | Lumezzane Obs. in Italy, 10 in MPEC 2008-Y61 -- 2008 YK2, 2008 XV2, 2008 WN2, 2008 UC, 1999 YF3, 89355, 52762, 200754, 162361, 2368 |
| H01 | Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2008-Y61 & 2008-Y62 -- 2008 YG26, 2008 YC3 |
| B67 | Mirasteilas Obs. in Switzerland, 1 in MPEC 2008-Y61 -- 2008 XE2 |
| A13 | Naef Obs. in Switzerland, 4 in MPEC 2008-Y61 -- 2008 XV2, 2007 VL8, 2001 WT1, 141765 |
| H45 | Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 8 in MPEC 2008-Y61 -- 2008 XP2, 2008 XE2, 2008 WQ63, 2008 UC95, 2008 MB5, 2008 EV5, 2005 BC, 2002 XP90 |
| 473 | Remanzacco Obs. in Italy, 1 in MPEC 2008-Y63 -- 2008 YM27 |
| H11 | Rodeo Obs. in New Mexico, 1 in MPEC 2008-Y61 -- 2008 WQ63 |
| 145 | S-Gravenwezel Obs. in Belgium, 1 in MPEC 2008-Y61 -- 2008 EV5 |
| 854 | Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-Y62 -- 2008 YG26 |
| E12 | Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2008-Y61 -- 2008 YA, 2004 XY60 |
| 291 | Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2008-Y61 -- 2008 VB1, 2008 SJ82 |
| 611 | Starkenburg Obs. in Germany, 2 in MPECs 2008-Y62 & 2008-Y63 -- 2008 YM27, 2008 YG26 |
| H53 | Thompsonville Obs. in Illinois, 3 in MPEC 2008-Y61 -- 2004 LV3, 162900, 1980 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 29 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 YC3 | JPL Sentry | 1528 | 2070-2107 | 28 | 2.7e-04 | -4.24 | -4.91 | 0 | JPL: "Analysis based on 21 observations spanning 6.8814 days (2008-Dec-22.25277 to 2008-Dec-29.13413)." Diameter approximately 0.027 km. from mean, weighted H=25.5. |
| NEODyS | 1528 | 2085-2090 | 11 | 4.97e-05 | -4.92 | -5.38 | 0 | NEODyS: "Based on 25 optical observations (of which 4 are rejected as outliers) from 2008/12/22.254 to 2008/12/29.135." | |
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 29 December '08
Times are UTC for when items were noted or added by The Tracking News.
| 2358 | Grabbed MPEC 2008-Y63 - 2008 YM27 - see above |
| 1958 | Grabbed MPEC 2008-Y62 - 2008 YG26 - see above |
| 1528 | Noted that JPL Sentry has updated its 2008 YC3 risk assessment - see above Noted that NEODyS has reposted 2008 YC3 as an impact risk - see above Grabbed MPEC 2008-Y61 - Daily Orbit Update - see above |
| 0525 | Noted that the NEOCP has become active |
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