Contents on 17 February '08
- IAU Minor Planet Center
- NEOCP Activity -- one listing: 1 updated
- New MPECs -- one MPEC
- Observers -- fifteen observing facilities
- Impact Risk Monitoring -- three 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 17 February '08
The MPC's NEO Confirmation Page has 1 listing: 1 updated
When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one updated listing. This was a "one nighter."
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 17 February '08
Minor Planet Electronic Circulars
As of last check at 2354 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
<< DOU on 17 Feb. '08 >> MPEC 2008-D05 - "07:09 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K08CB9G 2008 CG119 (i=41.0°, arc=3 days, H=19.0 ~537m) from the Siding Spring Survey (SSS) (Feb. 16.45p1)
- K08C74M 2008 CM74 (small asteroid, arc=7 days, H=28.1 ~8m) from Schiaparelli Obs. (Feb. 15.20p1)
- K08A04F 2008 AF4 (arc=38 days, H=19.7 ~389m) from Peschiera del Garda Obs. (Feb. 8.91-93p3 & 9.93-95p3), Madonna di Dossobuono Obs. (Feb. 16.98p3), KLENOT (Feb. 16.99-00p6), Klet Obs. (Feb. 16.00-01p5), and Great Shefford Obs. (Feb. 17.11-12p3)
- Observations of recently (no longer) risk-listed objects
- K08C22E 2008 CE22 (small asteroid, arc=7 days, H=26.4 ~18m) from Astronomical Research Obs. (ARO) (Feb. 14.16-19p3)
- K08C22D 2008 CD22 (almost small, arc=8 days, H=21.9 ~141m) from ARO (Feb. 14.12p3), Balzaretto Obs. (Feb. 15.90-92p2), KLENOT (Feb. 16.98p6), and Klet Obs. (Feb. 17.02p6)
- K08C22B 2008 CB22 (arc=9 days, H=19.7 ~389m) from Guidestar Obs. (Feb. 17.13-15p3)
- K08C20M 2008 CM20 (arc=9 days, H=21.0 ~214m) from Great Shefford Obs. (Feb. 16.82-88p3)
- Observations of small asteroids (H>22.0)
- K08CH5B 2008 CB175 (arc=3 days, H=25.5 ~27m) from ARO (Feb. 16.29-30p3) and Great Shefford Obs. (Feb. 16.99-02p3)
- K08CB9K 2008 CK119 (arc=4 days, H=24.5 ~43m) from Farra d'Isonzo Obs. (Feb. 16.88-91p2)
- K08CB6P 2008 CP116 (arc=64 days, H=22.9 ~89m) from KLENOT (Feb. 16.98-99p6)
- K08CB6K 2008 CK116 (arc=4 days, H=23.4 ~71m) from ARO (Feb. 14.03-05p3)
- K08C21Y 2008 CY21 (arc=6 days, H=24.9 ~35m) from ARO (Feb. 14.13-14p3)
- K03W25P 2003 WP25 (arc=5 opp, H=24.3 ~47m) from Great Shefford Obs. (Feb. 16.92-97p3)
- Observations of almost-small asteroids (21.7<H<=22.0)
- K08C06C 2008 CC6 (q=0.284 AU, arc=10 days, H=22.0 ~135m) from Inastars Obs. (Feb. 16.91-92p4), Klet Obs. (Feb. 17.03p7), and KLENOT (Feb. 17.04-05p7)
- Observations of other objects
- K08CH5C 2008 CC175 (arc=3 days, H=21.5 ~170m) from ARO (Feb. 16.35-36p3) and Great Shefford Obs. (Feb. 17.04-09p3)
- K08CB8Z 2008 CZ118 (arc=5 days, H=18.3 ~741m) from Guidestar Obs. (Feb. 17.10-12p3)
- K08CB6R 2008 CR116 (arc=6 days, H=20.4 ~282m) from KLENOT (Feb. 17.01p6) and Klet Obs. (Feb. 17.05p7)
- K08CB6O 2008 CO116 (arc=3 days, H=21.2 ~195m) from ARO (Feb. 14.02-03p2)
- K08C01N 2008 CN1 (arc=15 days, H=20.5 ~269m) from Stammersdorf Obs. (Feb. 16.92-94p6), Madonna di Dossobuono Obs. (Feb. 16.94p3), KLENOT (Feb. 17.01-02p4), Peschiera del Garda Obs. (Feb. 17.02p10), and Klet Obs. (Feb. 17.04p7)
- K08C01L 2008 CL1 (arc=15 days, H=19.2 ~490m) from Klet Obs. (Feb. 17.06-07p7)
- K08B02U 2008 BU2 (i=38.4°, q=0.360 AU, arc=26 days, H=18.5 ~676m) from ARO (Feb. 14.09-11p3)
- K08A33J 2008 AJ33 (Q=5.436 AU, arc=31 days, H=20.0 ~339m) from ARO (Feb. 14.03-06p3 at V=22.1)
- K07W55F 2007 WF55 (arc=75 days, H=19.1 ~513m) from ARO (Feb. 14.10-11p3)
- K07W03V 2007 WV3 (arc=88 days, H=19.7 ~389m) from ARO (Feb. 14.08-10p3)
- K07T08G 2007 TG8 (Q=4.305 AU, arc=157 days, H=18.6 ~645m) from Peschiera del Garda Obs. (Feb. 17.04-05p3)
- K05T45U 2005 TU45 (arc=3 opp, H=17.0 ~1.35 km) from Peschiera del Garda Obs. (Feb. 5.90-91p3, 8.88-90p3 & 11.82-86p4)
- K05E70K 2005 EK70 (arc=4 opp, H=17.5 ~1.07 km) from North Obs. (Feb. 16.90p5)
- K04S20B 2004 SB20 (arc=2 opp, H=18.5 ~676m) from Guidestar Obs. (Feb. 17.17-18p3)
- K03G00W 2003 GW (i=49.4°, arc=3 opp, H=16.7 ~1.55 km) from SSS (Feb. 16.64-69p4)
- K00DA7P 2000 DP107 (arc=4 opp, H=18.2 ~776m) from KLENOT (Feb. 17.02-03p7)
- H3689 173689 2001 PK9 from SSS (Feb. 16.65-70p4)
- F3591 153591 2001 SN263 from Balzaretto Obs. (Feb. 15.88p6), Stammersdorf Obs. (Feb. 16.83-85p6 & 16.90p1), and North Obs. (Feb. 16.88p3)
- 68359 68359 2001 OZ13 from Bocholt Obs. (Feb. 15.75-77p3)
- 40267 40267 1999 GJ4 from Bocholt Obs. (Feb. 15.93-97p4)
- 04450 4450 Pan (1987 SY) from North Obs. (Feb. 16.86-87p5)
- 01620 1620 Geographos (1951 RA) from Madonna di Dossobuono Obs. (Feb. 16.95p3)
Observers on 17 February '08
Fifteen observing facilities appear in today's MPEC.
| Code | Observer / observatory |
|---|---|
| H55 | Astronomical Research Obs. (ARO) in Illinois, 11 in MPEC 2008-D05 -- 2008 CY21, 2008 CO116, 2008 CK116, 2008 CE22, 2008 CD22, 2008 CC175, 2008 CB175, 2008 BU2, 2008 AJ33, 2007 WV3, 2007 WF55 |
| A81 | Balzaretto Obs. in Italy, 2 in MPEC 2008-D05 -- 2008 CD22, 153591 |
| B48 | Bocholt Obs. in Germany, 2 in MPEC 2008-D05 -- 68359, 40267 |
| 595 | Farra d'Isonzo Obs. in Italy, 1 in MPEC 2008-D05 -- 2008 CK119 |
| J95 | Great Shefford Obs. in England, 5 in MPEC 2008-D05 -- 2008 CM20, 2008 CC175, 2008 CB175, 2008 AF4, 2003 WP25 |
| A17 | Guidestar Obs. in Germany, 3 in MPEC 2008-D05 -- 2008 CZ118, 2008 CB22, 2004 SB20 |
| B15 | Inastars Obs. in Germany, 1 in MPEC 2008-D05 -- 2008 CC6 |
| 246 | KLENOT in the Czech Republic, 7 in MPEC 2008-D05 -- 2008 CR116, 2008 CP116, 2008 CN1, 2008 CD22, 2008 CC6, 2008 AF4, 2000 DP107 |
| 046 | Klet Obs. in the Czech Republic, 6 in MPEC 2008-D05 -- 2008 CR116, 2008 CN1, 2008 CL1, 2008 CD22, 2008 CC6, 2008 AF4 |
| 560 | Madonna di Dossobuono Obs. in Italy, 3 in MPEC 2008-D05 -- 2008 CN1, 2008 AF4, 1620 |
| J69 | North Obs. in England, 3 in MPEC 2008-D05 -- 2005 EK70, 153591, 4450 |
| A53 | Peschiera del Garda Obs. in Italy, 4 in MPEC 2008-D05 -- 2008 CN1, 2008 AF4, 2007 TG8, 2005 TU45 |
| 204 | Schiaparelli Obs. in Italy, 1 in MPEC 2008-D05 -- 2008 CM74 |
| E12 | Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2008-D05 -- 2008 CG119, 2003 GW, 173689 |
| A97 | Stammersdorf Obs. in Austria, 2 in MPEC 2008-D05 -- 2008 CN1, 153591 |
Impact Risk Monitoring on 17 February '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 CG119 | NEODyS | 1525 | R E M O V E D | ||||||
| 2008 CM74 | JPL Sentry | 1525 | 2079-2100 | 7 | 1.8e-06 | -7.67 | -7.99 | 0 | JPL: "Analysis based on 17 observations spanning 6.8352 days (2008-Feb-08.36778 to 2008-Feb-15.20297)." Diameter approximately 0.008 km. from mean, weighted H=28.0. |
| NEODyS | 1525 | 2069-2081 | 2 | 1.71e-08 | -9.55 | -9.67 | 0 | NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2008/02/08.369 to 2008/02/15.204." | |
| 2008 AF4 | JPL Sentry | 1525 | 2078-2101 | 26 | 1.9e-05 | -2.41 | -2.68 | 0 | JPL: "Analysis based on 534 observations spanning 37.725 days (2008-Jan-10.39652 to 2008-Feb-17.12131)." Diameter approximately 0.390 km. from mean, weighted H=19.7. |
| NEODyS | 1525 | 2078-2090 | 10 | 1.2e-05 | -2.59 | -2.68 | 0 | NEODyS: "Based on 538 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/02/17.122." | |
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 17 February '08
Times are UTC for when items were noted or added by The Tracking News.
| 1525 | Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above Noted that NEODyS has updated its 2008 AF4 risk assessment - see above Noted that NEODyS has removed 2008 CG119 as an impact risk - see above Noted that JPL Sentry has updated its 2008 CM74 risk assessment - see above Noted that NEODyS has updated its 2008 CM74 risk assessment - see above Grabbed MPEC 2008-D05 - Daily Orbit Update - see above |
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