Contents on 24 February '10
- IAU Minor Planet Center
- NEOCP Activity -- six listings: 1 new, 5 updated
- New MPECs -- two MPECs
- Observers -- eleven 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
- 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 24 February '10
The MPC's NEO Confirmation Page has 6 listings: 1 new, 5 updated
When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and five updated listings. So far The Tracking News has counted a total of seven listings on the NEOCP at some point today.
To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.
New MPECs on 24 February '10
Minor Planet Electronic Circulars
As of last check at 2359 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2010-D76 time-stamped "07:23 UT" - Daily Orbit Update - see below
- MPEC 2010-D77 time-stamped "13:53 UT" - 2010 DK34
MPEC 2010-D77 - "13:53 UT" - 2010 DK34
- K10D34K 2010 DK34 (H=21.0 ~214m) was discovered at 0637 UT on 20 Feb. by WISE, which observed it at Feb. 20.28p1, 20.34p1, 20.54p1, 20.61p1, 20.67p1, 20.74p1, and 20.81p2. The discovery was confirmed by Sandlot Obs. (Feb. 23.42-45p4 & 24.43-47p3).
<< DOU on 24 Feb. '10 >> MPEC 2010-D76 - "07:23 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K10D01G 2010 DG1 (small asteroid, arc=7 days, H=24.5 ~43m) from the Spacewatch 1.8m telescope (Feb. 18.23-24p3 & 24.28p2)
- K10D00M 2010 DM (q=0.342 AU, arc=8 days, H=19.0 ~537m) from Spacewatch 1.8m (Feb. 24.24-25p2)
- Observations of recently (no longer) risk-listed objects
- K10D00P 2010 DP (i=36.6°, arc=3 days, H=18.5 ~676m) from the Mt. Lemmon Survey (MLS) (Feb. 19.49-50p4)
- Observations of small asteroids (H>22.0)
- K09U02D 2009 UD2 (arc=129 days, H=22.2 ~123m) from Hamamatsu-Yuto Obs. (Feb. 23.67-70p3)
- Observations of almost-small asteroids (21.7<H<=22.0)
- K10D01F 2010 DF1 (arc=6 days, H=21.8 ~148m) from Ovidiu Vaduvescu via La Palma (Feb. 23.15p4)
- Observations of other objects
- K10D01X 2010 DX1 (Q=4.412 AU, arc=4 days, H=21.4 ~178m) from Sandlot Obs. (Feb. 23.27-28p3)
- K10B03B 2010 BB3 (arc=31 days, H=20.3 ~295m) from MLS (Feb. 18.29-31p5)
- K10A00J 2010 AJ (Q=4.549 AU, arc=43 days, H=20.2 ~309m) from MLS (Feb. 18.20-21p5)
- K09X02C 2009 XC2 (Q=4.188 AU, arc=72 days, H=17.0 ~1.35 km) from Schiaparelli Obs. (Feb. 21.15-17p3)
- K09U03N 2009 UN3 (i=37.4°, arc=127 days, H=18.5 ~676m) from Hamamatsu-Yuto Obs. (Feb. 23.75-78p7)
- K09T10M 2009 TM10 (arc=153 days, H=19.4 ~446m) from MLS (Feb. 19.14-16p4)
- K09N00A 2009 NA (Q=4.129 AU, arc=234 days, H=17.5 ~1.07 km) from MLS (Feb. 20.25-26p4)
- K08E00E 2008 EE (arc=3 opp, H=19.8 ~371m) from Petit Jean Mtn. South Obs. (PJMSO) (Feb. 23.31-32p5) and Hamamatsu-Yuto Obs. (Feb. 23.62-65p5)
- K06W02Z 2006 WZ2 (arc=3 opp, H=16.9 ~1.41 km) from Betelgeuse Station (2009 Feb. 15.21-22p3)
- K06E01E 2006 EE1 (i=36.4°, arc=2 opp, H=19.8 ~371m) from Schiaparelli Obs. (Feb. 21.06-07p5) and Hamamatsu-Yuto Obs. (Feb. 23.70-74p7)
- K04T18B 2004 TB18 (arc=3 opp, H=17.7 ~977m) from WISE (Feb. 18.63p1, 18.76p1, 19.03p1, 19.16p1, 19.29p1, 19.42p1, 19.62p1, 19.69p2, 19.75p1, 19.82p1, 19.89p1, 20.02p1, 20.08p1, 20.15p2, 20.22p1, 20.28p1, 20.42p1, 20.55p1, 20.68p1, 20.81p1, 20.94p1 & 21.08p1)
- K02C58Y 2002 CY58 (arc=2 opp, H=21.0 ~214m) from the Spacewatch 0.9m telescope (Feb. 19.15-17p2)
- K01R11Z 2001 RZ11 (i=53.1°, arc=4 opp, H=16.3 ~1.86 km) from Spacewatch 0.9m (Feb. 20.17-21p2)
- K01P09T 2001 PT9 (arc=2 opp, H=20.8 ~234m) from Hamamatsu-Yuto Obs. (Feb. 23.55-61p6)
- K00CA1O 2000 CO101 (arc=2 opp, H=19.0 ~537m) from Hamamatsu-Yuto Obs. (Feb. 23.50-54p8)
- J99R32C 1999 RC32 (arc=4 opp, H=18.4 ~708m) from PJMSO (Feb. 23.34p2)
- J96B01A 1996 BA1 (arc=2 opp, H=20.7 ~245m) from Kanab Obs. (Feb. 23.28-31p2)
- G2385 162385 2000 BM19 from Betelgeuse Sta. (2009 Feb. 15.23p2)
- E3651 143651 2003 QO104 from Betelgeuse Sta. (2009 Feb. 15.19p3)
- 68350 68350 2001 MK3 from Betelgeuse Sta. (2009 Feb. 15.19-20p3)
- 52768 52768 1998 OR2 from Betelgeuse Sta. (2009 Feb. 15.17p3)
Observers on 24 February '10
Eleven observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| B75 | Betelgeuse Station in Italy, 5 in MPEC 2010-D76 -- 2006 WZ2, 68350, 52768, 162385, 143651 |
| 379 | Hamamatsu-Yuto Obs. in Japan, 6 in MPEC 2010-D76 -- 2009 UN3, 2009 UD2, 2008 EE, 2006 EE1, 2001 PT9, 2000 CO101 |
| 682 | Kanab Obs. in Utah, 1 in MPEC 2010-D76 -- 1996 BA1 |
| 950. | Ovidiu Vaduvescu via La Palma in the Canary Islands, 1 in MPEC 2010-D76 -- 2010 DF1 |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 5 in MPEC 2010-D76 -- 2010 DP, 2010 BB3, 2010 AJ, 2009 TM10, 2009 NA |
| H45 | Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2010-D76 -- 2008 EE, 1999 RC32 |
| H36 | Sandlot Obs. in Kansas, 2 in MPECs 2010-D76 & 2010-D77 -- 2010 DX1, 2010 DK34 |
| 204 | Schiaparelli Obs. in Italy, 2 in MPEC 2010-D76 -- 2009 XC2, 2006 EE1 |
| 691 | Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2010-D76 -- 2002 CY58, 2001 RZ11 |
| 291 | Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2010-D76 -- 2010 DM, 2010 DG1 |
| C51 | WISE in Earth polar orbit, 2 in MPECs 2010-D76 & 2010-D77 -- 2010 DK34, 2004 TB18 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 24 February '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 DG1 | JPL Sentry | 1500 | 2050 | 1 | 1.8e-09 | -8.19 | -8.19 | 0 | JPL: "Analysis based on 33 observations spanning 7.0698 days (2010-Feb-17.2105 to 2010-Feb-24.28031)." Diameter approximately 0.044 km. from mean, weighted H=24.4. |
| NEODyS | 1500 | 2050 | 1 | 8.47e-11 | -9.50 | -9.50 | 0 | NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2010/02/17.211 to 2010/02/24.281." | |
| 2010 DM | JPL Sentry | 1500 | R E M O V E D | JPL: Risk listing removed at 1054 UTC. | |||||
| NEODyS | 1500 | R E M O V E D | - | ||||||
| 2010 CL19 | JPL Sentry | 2201 | 2019-2108 | 40 | 1.4e-06 | -2.01 | -2.39 | 0 | JPL: "Analysis based on 32 observations spanning 4.0113 days (2010-Feb-13.09558 to 2010-Feb-17.10688)." Diameter approximately 0.967 km. from mean, weighted H=17.7. |
| 2005 YU55 | NEODyS | 2103 | 2043-2109 | 95 | 4.13e-04 | -2.16 | -2.51 | 1 | NEODyS: "Based on 46 optical observations (of which 0 are rejected as outliers) from 2005/12/24.299 to 2010/02/20.542. NOTE: The Virtual Impactors in 2103/11/10.386 and 2103/11/10.488 ... are rated as Torino Scale 1." |
| JPL Sentry | 2000 | 2043-2109 | 53 | 9.5e-04 | -1.79 | -1.90 | 1 | JPL: "Analysis based on 46 observations spanning 1519.2 days (2005-Dec-24.29832 to 2010-Feb-20.541105)." Diameter approximately 0.140 km. from mean, weighted H=22.0. | |
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 24 February '10
Times are UTC for when items were noted or added by The Tracking News.
| 2201 | Noted that JPL Sentry has posted 2010 CL19 as an impact risk - see above |
| 2103 | Noted that NEODyS has updated its 2005 YU55 risk assessment - see above |
| 2000 | Noted that JPL Sentry has updated its 2005 YU55 risk assessment - see above |
| 1500 | Noted that JPL Sentry has updated its 2010 DG1 risk assessment - see above Noted that NEODyS has updated its 2010 DG1 risk assessment - see above Noted that JPL Sentry has removed 2010 DM as an impact risk - see above Noted that NEODyS has removed 2010 DM as an impact risk - see above Grabbed MPEC 2010-D76 - Daily Orbit Update - see above Grabbed MPEC 2010-D77 - 2010 DK34 - see above |
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