Contents on 20 March '08
- IAU Minor Planet Center
- NEOCP Activity -- two listings: 2 updated
- New MPECs -- three MPECs
- Observers -- nine observing facilities
- 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
- 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 20 March '08
The MPC's NEO Confirmation Page has 2 listings: 2 updated
When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two updated listings. Both of these were "one nighters." So far The Tracking News has counted a total of six 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 20 March '08
Minor Planet Electronic Circulars
As of last check at 2354 UTC, there have been three MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2008-F11 time-stamped "06:10 UT" - Daily Orbit Update - see below
- MPEC 2008-F12 time-stamped "11:23 UT" - 2008 EZ97 - see below
- MPEC 2008-F13 time-stamped "20:44 UT" - 2008 EN82
MPEC 2008-F13 - "20:44 UT" - 2008 EN82
- K08E82N 2008 EN82 (H=16.0 ~2.14 km, q=1.121 AU) from Purple Mtn. Obs. XuYi Station (March 2.64-69p4) and the Catalina Sky Survey (CSS) (March 4.30-31p4 & 12.30-32p4)
MPEC 2008-F12 - "11:23 UT" - 2008 EZ97
- K08E97Z 2008 EZ97 (risk-listed, H=17.7 ~977m) was discovered at 1232 UT on 15 March by the Mt. Lemmon Survey (MLS), which observed it at March 15.50-52p8. The discovery was confirmed by Magdalena Ridge Obs. (MRO) (March 19.42-45p4 & 20.40-41p3).
<< DOU on 20 Mar. '08 >> MPEC 2008-F11 - "06:10 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K08E69D 2008 ED69 (i=36.3°, Q=5.086 AU, arc=8 days, H=16.7 ~1.55 km) from MRO (March 19.40-41p5)
- K08E69C 2008 EC69 (Q=4.397 AU, arc=8 days, H=17.0 ~1.35 km) from MRO (March 19.38p5)
- K08E09A 2008 EA9 (small asteroid, arc=13 days, H=27.8 ~9m) from David Tholen's team on Mauna Kea (March 13.53p2) and MRO (March 19.41p2)
- K08E07R 2008 ER7 (arc=13 days, H=19.9 ~355m) from MRO (March 19.37p3)
- Observations of small asteroids (H>22.0)
- K08E07Q 2008 EQ7 (arc=13 days, H=22.5 ~107m) from Desert Moon Obs. (March 19.29-33p3)
- Observations of other objects
- K08E85M 2008 EM85 (arc=6 days, H=19.5 ~426m) from Great Shefford Obs. (March 19.94-95p3)
- K08E06O 2008 EO6 (arc=14 days, H=19.7 ~389m) from Desert Moon Obs. (March 19.24-27p3)
- K08E05Z 2008 EZ5 (arc=15 days, H=19.5 ~426m) from Desert Moon Obs. (March 19.45-47p2)
- K08CB8Z 2008 CZ118 (arc=36 days, H=18.4 ~708m) from Desert Moon Obs. (March 19.21-22p3)
- K08C00M 2008 CM (i=36.0°, arc=46 days, H=17.1 ~1.29 km) from Desert Moon Obs. (March 19.10-12p3)
- K08C00H 2008 CH (arc=40 days, H=20.2 ~309m) from Astronomical Research Obs. (ARO) (March 12.35-36p3)
- K07V07Y 2007 VY7 (arc=3 opp, H=19.5 ~426m) from LINEAR (March 19.34-38p4)
- K07V04Q 2007 VQ4 (arc=3 opp, H=15.8 ~2.34 km, q=1.271 AU) from Great Shefford Obs. (March 19.96p3)
- K06UL6M 2006 UM216 (Q=4.076 AU, arc=3 opp, H=16.0 ~2.14 km, q=1.288 AU)
- K02AC9J 2002 AJ129 (q=0.117 AU, arc=3 opp, H=18.5 ~676m) from Desert Moon Obs. (March 19.40-42p3)
- F4988 154988 2004 XN35 from Desert Moon Obs. (March 19.36-38p3)
- 85818 85818 1998 XM4 from Desert Moon Obs. (March 19.49-50p3)
- 53319 53319 1999 JM8 from LINEAR (March 19.33-38p5)
Observers on 20 March '08
Nine observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| H55 | Astronomical Research Obs. in Illinois, 1 in MPEC 2008-F11 -- 2008 CH |
| 703 | Catalina Sky Survey in Arizona, 1 in MPEC 2008-F13 -- 2008 EN82 |
| 448 | Desert Moon Obs. in New Mexico, 8 in MPEC 2008-F11 -- 2008 EZ5, 2008 EQ7, 2008 EO6, 2008 CZ118, 2008 CM, 2002 AJ129, 85818, 154988 |
| J95 | Great Shefford Obs. in England, 2 in MPEC 2008-F11 -- 2008 EM85, 2007 VQ4 |
| 704 | LINEAR in New Mexico, 2 in MPEC 2008-F11 -- 2007 VY7, 53319 |
| H01 | Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2008-F11 & 2008-F12 -- 2008 EZ97, 2008 ER7, 2008 ED69, 2008 EC69, 2008 EA9 |
| 5682 | David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-F11 -- 2008 EA9 |
| G96 | Mt. Lemmon Survey in Arizona, 1 in MPEC 2008-F12 -- 2008 EZ97 |
| D29 | Purple Mtn. Obs. XuYi Station in China, 1 in MPEC 2008-F13 -- 2008 EN82 |
Impact Risk Monitoring on 20 March '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 EZ97 | JPL Sentry | 1331 | 2088 | 1 | 1.4e-10 | -7.57 | -7.57 | 0 | JPL: "Analysis based on 15 observations spanning 4.9099 days (2008-Mar-15.49955 to 2008-Mar-20.40947)." Diameter approximately 0.440 km. from mean, weighted H=19.4. |
| 2008 ED69 | NEODyS | 1331 | R E M O V E D | ||||||
| 2008 EC69 | NEODyS | 1332 | 2049-2088 | 24 | 1.71e-07 | -3.00 | -3.13 | 0 | NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2008/03/11.497 to 2008/03/19.385." |
| JPL Sentry | 1331 | 2032-2105 | 18 | 2.0e-07 | -2.91 | -3.08 | 0 | JPL: "Analysis based on 42 observations spanning 7.8882 days (2008-Mar-11.49608 to 2008-Mar-19.38432)." Diameter approximately 1.300 km. from mean, weighted H=17.1. | |
| 2008 EA9 | NEODyS | 1332 | 2044-2090 | 23 | 3.41e-05 | -6.16 | -6.72 | 0 | NEODyS: "Based on 32 optical observations (of which 1 are rejected as outliers) from 2008/03/06.406 to 2008/03/19.415." |
| JPL Sentry | 1331 | 2068-2106 | 8 | 3.2e-05 | -6.21 | -6.70 | 0 | JPL: "Analysis based on 31 observations spanning 13.009 days (2008-Mar-06.40551 to 2008-Mar-19.41444)." Diameter approximately 0.010 km. from mean, weighted H=27.7. | |
| 2008 ER7 | NEODyS | 1332 | 2059-2090 | 6 | 1.31e-06 | -3.46 | -3.46 | 0 | NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2008/03/06.337 to 2008/03/19.375." |
| JPL Sentry | 1331 | 2063-2105 | 32 | 9.1e-06 | -2.66 | -3.03 | 0 | JPL: "Analysis based on 48 observations spanning 13.039 days (2008-Mar-06.33608 to 2008-Mar-19.37463)." Diameter approximately 0.336 km. from mean, weighted H=20.0. | |
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 20 March '08
Times are UTC for when items were noted or added by The Tracking News.
| 2247 | Grabbed MPEC 2008-F13 - 2008 EN82 - see above |
| 1332 | Noted that NEODyS has updated its 2008 EA9 risk assessment - see above Noted that NEODyS has updated its 2008 EC69 risk assessment - see above Noted that NEODyS has updated its 2008 ER7 risk assessment - see above |
| 1331 | Noted that JPL Sentry has updated its 2008 EA9 risk assessment - see above Noted that JPL Sentry has updated its 2008 EC69 risk assessment - see above Noted that NEODyS has removed 2008 ED69 as an impact risk - see above Noted that JPL Sentry has updated its 2008 ER7 risk assessment - see above Noted that JPL Sentry has posted 2008 EZ97 as an impact risk - see above Grabbed MPEC 2008-F11 - Daily Orbit Update - see above Grabbed MPEC 2008-F12 - 2008 EZ97 - see above |
Publisher information, privacy statement, and disclaimer.
This page is © Copyright 2008 Columbine, Inc. - All Rights Reserved
Any mentioned trademarks are the property of their respective owners.
Various tabular formats and data used on this page are acknowledged as belonging to JPL, MPC, NEODyS, and/or others.
Do NOT copy, mirror, or embed this page, but you are welcome to link to it, and you may embed the RSS news feed. All information here is subject to very frequent change during the day of news compilation. Individuals may make copies for their own private, non-commercial use. Please report broken links or other problems with this page to <webmaster@hohmanntransfer.com> (HTML 4.01 validation).
Important news updates are flagged by A/CC's RSS news feed (link).