Contents on 5 March '09
- IAU Minor Planet Center
- NEOCP Activity -- three listings: 3 updated
- New MPECs -- two MPECs
- Observers -- ten 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 5 March '09
The MPC's NEO Confirmation Page has 3 listings: 3 updated
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three updated listings. All of these 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 5 March '09
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2009-E39 time-stamped "07:08 UT" - Daily Orbit Update - see below
- MPEC 2009-E40 time-stamped "20:46 UT" - 2009 EW
MPEC 2009-E40 - "20:46 UT" - 2009 EW
- K09E00W 2009 EW (risk-listed, Earth MOID=0.9 LD, H=26.4 ~18m) from Great Shefford Obs. (March 5.84p5) This object is now within ten lunar distances (LD) of Earth, reaching 0.9 LD on 6 March (INTRUDER).
<< DOU on 5 Mar. '09 >> MPEC 2009-E39 - "07:08 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K09E00W 2009 EW (small asteroid, arc=3 days, H=26.4 ~18m) from Great Shefford Obs. (March 4.87p3)
- Observations of recently (no longer) risk-listed objects
- K09D47E 2009 DE47 (arc=4 days, H=18.5 ~676m) from Petit Jean Mtn. South Obs. (PJMSO) (March 4.45-46p7)
- K09D03R 2009 DR3 (arc=18 days, H=21.5 ~170m) from Cyclops Obs. (March 2.81-82p5) and PJMSO (March 4.36-37p7)
- K09D01A 2009 DA1 (small asteroid, Q=4.389 AU, arc=12 days, H=22.3 ~117m) from the Spacewatch 0.9m telescope (March 3.16-19p3)
- K09C02A 2009 CA2 (arc=27 days, H=18.7 ~616m) from program code "." (23) via La Palma (Feb. 12.21p8)
- Observations of small asteroids (H>22.0)
- K09E00A 2009 EA (arc=2 days, H=26.5 ~17m) from Spacewatch 0.9m (March 3.27-31p2) and Astronomical Research Obs. (ARO) (March 3.30p3)
- K09D46J 2009 DJ46 (arc=3 days, H=25.6 ~26m) from ARO (March 3.26p3)
- K09D45D 2009 DD45 (arc=5 days, H=25.7 ~25m) from Starkenburg Obs. (March 4.03-04p3) and Great Shefford Obs. (March 4.89-91p3)
- K09D04P 2009 DP4 (arc=12 days, H=23.0 ~85m) from Mt. John Obs. (March 4.51-52p4)
- Observations of other objects
- K09D45M 2009 DM45 from Taunus Obs. (March 3.89-91p18)
- K09D04Q 2009 DQ4 (arc=11 days, H=21.0 ~214m) from Cyclops Obs. (Feb. 28.96p5)
- K09B71A 2009 BA71 (arc=2 opp, H=20.7 ~245m) from PJMSO (March 4.38-39p6)
- K06K01T 2006 KT1 (arc=4 opp, H=16.6 ~1.62 km) from Spacewatch 0.9m (March 1.23-27p3)
- K05E94G 2005 EG94 (arc=3 opp, H=18.4 ~708m) from Spacewatch 0.9m (March 1.28-31p3)
- K05E00F 2005 EF (arc=2 opp, H=20.7 ~245m) from Spacewatch 0.9m (March 2.35-39p3)
- K04E09U 2004 EU9 (arc=3 opp, H=18.9 ~562m) from PJMSO (March 4.40-41p5)
- K04B11L 2004 BL11 (q=0.315 AU, arc=5 opp, H=19.3 ~467m) from Spacewatch 0.9m (March 3.49-52p3)
- J98Y04M 1998 YM4 (arc=3 opp, H=19.7 ~389m) from Spacewatch 0.9m (March 2.41-44p3)
- G2011 162011 1994 AB1 from Spacewatch 0.9m (March 1.45-48p3)
- D9622 139622 2001 QQ142 from Spacewatch 0.9m (March 1.49-51p3)
- D8325 138325 2000 GO82 from Spacewatch 0.9m (March 3.27-30p3)
- 99935 99935 2002 AV4 from Spacewatch 0.9m (March 2.35-38p3)
- 65706 65706 1992 NA from Spacewatch 0.9m (March 3.27-30p2)
- 18882 18882 1999 YN4 from the Siding Spring Survey (SSS) (March 4.59-61p3)
- 08566 8566 1996 EN from Spacewatch 0.9m (March 2.29p1)
Observers on 5 March '09
Ten observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| H55 | Astronomical Research Obs. (ARO) in Illinois, 2 in MPEC 2009-E39 -- 2009 EA, 2009 DJ46 |
| B84 | Cyclops Obs. in The Netherlands, 2 in MPEC 2009-E39 -- 2009 DR3, 2009 DQ4 |
| J95 | Great Shefford Obs. in England, 2 in MPECs 2009-E39 & 2009-E40 -- 2009 EW, 2009 DD45 |
| 950. | program code "." (23) via La Palma in the Canary Islands, 1 in MPEC 2009-E39 -- 2009 CA2 |
| 474 | Mt. John Obs. in New Zealand, 1 in MPEC 2009-E39 -- 2009 DP4 |
| H45 | Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 4 in MPEC 2009-E39 -- 2009 DR3, 2009 DE47, 2009 BA71, 2004 EU9 |
| E12 | Siding Spring Survey in New South Wales, 1 in MPEC 2009-E39 -- 18882 |
| 691 | Spacewatch 0.9m telescope in Arizona, 13 in MPEC 2009-E39 -- 2009 EA, 2009 DA1, 2006 KT1, 2005 EG94, 2005 EF, 2004 BL11, 1998 YM4, 99935, 65706, 162011, 139622, 138325, 8566 |
| 611 | Starkenburg Obs. in Germany, 1 in MPEC 2009-E39 -- 2009 DD45 |
| B01 | Taunus Obs. in Germany, 1 in MPEC 2009-E39 -- 2009 DM45 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 5 March '09
| 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 |
| 2009 EW | JPL Sentry | 2300 | 2064-2081 | 12 | 5.5e-06 | -6.00 | -6.41 | 0 | JPL #2 for the day: "Analysis based on 33 observations spanning 3.5481 days (2009-Mar-02.29194 to 2009-Mar-05.840076)." Diameter approximately 0.018 km. from mean, weighted H=26.3. |
| NEODyS | 1519 | 2064-2089 | 19 | 1.74e-05 | -5.51 | -5.61 | 0 | NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2009/03/02.293 to 2009/03/04.867." | |
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 5 March '09
Times are UTC for when items were noted or added by The Tracking News.
| 2300 | Noted that JPL Sentry has updated its 2009 EW risk assessment - see above |
| 2103 | Grabbed MPEC 2009-E40 - 2009 EW - see above |
| 1519 | Noted that NEODyS has updated its 2009 EW risk assessment - see above |
| 1518 | Noted that JPL Sentry has updated its 2009 EW risk assessment - see above Grabbed MPEC 2009-E39 - Daily Orbit Update - see above |
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