This image from 10:59pm EST on March 5th (0359 UTC) comes from a network of all-sky cameras that caught this fireball for the University of Western Ontario Physics and Astronomy Department. It's expected that one or more meteorites survived in the Parry Sound area from this event. See more info. Credit: UWO.
Contents on 7 March '08
- IAU Minor Planet Center
- NEOCP Activity -- twelve listings: 4 new, 8 updated
- New MPECs -- seven MPECs
- Observers -- seventeen observing facilities
- Impact Risk Monitoring -- six 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 7 March '08
The MPC's NEO Confirmation Page has 12 listings: 4 new, 8 updated
When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and eight updated listings. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 21 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 7 March '08
Minor Planet Electronic Circulars
As of last check at 2355 UTC, there have been seven MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2008-E59 time-stamped "07:08 UT" - Daily Orbit Update - see below
- MPEC 2008-E60 time-stamped "18:42 UT" - 2008 EM7 - see below
- MPEC 2008-E61 time-stamped "18:46 UT" - 2008 EN7 - see below
- MPEC 2008-E62 time-stamped "19:17 UT" - 2008 EO7 - see below
- MPEC 2008-E63 time-stamped "19:28 UT" - 2008 EP7 - see below
- MPEC 2008-E64 time-stamped "19:34 UT" - 2008 EQ7 - see below
- MPEC 2008-E65 time-stamped "20:06 UT" - 2008 ER7
MPEC 2008-E65 - "20:06 UT" - 2008 ER7
- K08E07R 2008 ER7 (risk-listed, Earth MOID=0.5 LD, H=20.4 ~282m) was discovered at 0803 UT on 6 March by the Spacewatch 0.9m telescope, which observed it at March 6.34-37p3. The discovery was confirmed by KLENOT (March 6.97-98p6), the Mt. Lemmon Survey (MLS) (March 7.33-35p4), and the Spacewatch 1.8m telescope (March 7.38-39p2).
MPEC 2008-E64 - "19:34 UT" - 2008 EQ7
- K08E07Q 2008 EQ7 (small asteroid, H=22.7 ~98m) was discovered at 0745 UT on 6 March by the Catalina Sky Survey (CSS), which observed it at March 6.32-42p7 and 6.47-48p4. The discovery was confirmed by KLENOT (March 6.99-00p6), Modra Obs. (March 7.15-16p3), Grasslands Obs. (March 7.28p2), and MLS (March 7.33-35p4).
MPEC 2008-E63 - "19:28 UT" - 2008 EP7
- K08E07P 2008 EP7 (small asteroid, H=23.6 ~65m) was discovered at 0737 UT on 6 March by MLS, which observed it at March 6.32-37p8 and 7.31-32p4. The discovery was confirmed by KLENOT (March 6.88-90p5) and Grasslands Obs. (March 7.26-27p2).
MPEC 2008-E62 - "19:17 UT" - 2008 EO7
- K08E07O 2008 EO7 (H=20.8 ~234m) was discovered at 0710 UT on 6 March by Spacewatch 0.9m, which observed it at March 6.30-33p3. The discovery was confirmed by MLS (March 7.33-35p4 at V=21.1-22.1) and Spacewatch 1.8m (March 7.36-38p2).
MPEC 2008-E61 - "18:46 UT" - 2008 EN7
- K08E07N 2008 EN7 (H=20.5 ~269m) was discovered at 0704 UT on 6 March by CSS, which observed it at March 6.29-32p4, 6.37-39p4, and 6.47-48p4. The discovery was confirmed by KLENOT (March 6.00p6), Grasslands Obs. (March 7.29p2), and MLS (March 7.33-35p4).
MPEC 2008-E60 - "18:42 UT" - 2008 EM7
- K08E07M 2008 EM7 (risk-listed, Earth MOID=7.2 LD, H=21.6 ~162m) was discovered at 0611 UT on 6 March by MLS, which observed it at March 6.26-28p4, 6.35-37p4, and 7.31-35p8. The discovery was confirmed by KLENOT (March 6.90-91p3) and Spacewatch 1.8m (March 7.34-35p3).
<< DOU on 7 Mar. '08 >> MPEC 2008-E59 - "07:08 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K08E05V 2008 EV5 (arc=2 days, H=20.0 ~339m) from MLS (March 6.19-20p4)
- K08E05E 2008 EE5 (i=45.0°, arc=2 days, H=19.1 ~513m) from MLS (March 6.18-20p4)
- K08A04F 2008 AF4 (arc=55 days, H=19.7 ~389m) from CSS (March 4.27-29p4)
- Observations of recently (no longer) risk-listed objects
- K08E01K 2008 EK1 (i=39.2°, arc=3 days, H=20.3 ~295m) from Silver Spring Obs. (March 6.16-19p3), Spacewatch 1.8m (March 6.19-20p3), Mt. John Obs. (March 6.43p4), and KLENOT (March 6.88p6)
- K08E00S 2008 ES (arc=3 days, H=18.2 ~776m) from MLS (March 5.41-43p4)
- K08D05K 2008 DK5 (arc=7 days, H=21.0 ~214m) from Spacewatch 0.9m (March 6.34-38p3)
- K08D05G 2008 DG5 (arc=7 days, H=19.6 ~407m) from CSS (March 6.24-26p4)
- K08D00J 2008 DJ (arc=11 days, H=20.5 ~269m) from KLENOT (March 6.87p6)
- K08D00E 2008 DE (arc=21 days, H=19.4 ~446m) from Silver Spring Obs. (March 3.19p1, 3.26p1 & 3.32p1)
- K08C21Z 2008 CZ21 (arc=25 days, H=20.3 ~295m) from Spacewatch 0.9m (March 4.12-15p3)
- K08B18T 2008 BT18 (arc=34 days, H=18.3 ~741m) from CSS (March 5.12-14p4)
- Observations of small asteroids (H>22.0)
- K08E00M 2008 EM (arc=5 days, H=24.3 ~47m) from MLS (March 6.20-22p4)
- K08A33L 2008 AL33 (arc=51 days, H=22.7 ~98m) from Spacewatch 0.9m (March 6.17p1)
- K03T01M 2003 TM1 (arc=2 opp, H=22.1 ~129m) from CSS (March 6.17-18p4)
- Observations of other objects
- K08E06O 2008 EO6 (arc=1 day, H=19.7 ~389m) from Astronomical Research Obs. (ARO) (March 6.26-27p3) and Junk Bond Obs. (March 6.45-50p3)
- K08E06N 2008 EN6 (arc=1 day, H=19.1 ~513m) from ARO (March 6.20-22p3)
- K08E05Y 2008 EY5 (q=0.235 AU, arc=2 days, H=20.1 ~323m) from the Siding Spring Survey (SSS) (March 6.47p4)
- K08E01J 2008 EJ1 (i=38.7°, arc=4 days, H=15.8 ~2.34 km, q=0.984 AU) from SSS (March 6.65p1)
- K08E00J 2008 EJ (i=38.6°, arc=6 days, H=20.2 ~309m) from KLENOT (March 6.95p7)
- K08D23H 2008 DH23 (arc=6 days, H=19.6 ~407m) from Spacewatch 1.8m (March 6.34-36p3)
- K08D05L 2008 DL5 (arc=7 days, H=21.7 ~155m) from Spacewatch 1.8m (March 6.31p3) and Mt. John Obs. (March 6.55p3)
- K08D00W 2008 DW (arc=9 days, H=21.6 ~162m) from Spacewatch 1.8m (March 6.33p3)
- K08CH5C 2008 CC175 (arc=21 days, H=21.4 ~178m) from MLS (March 6.53p3)
- K08CB6M 2008 CM116 (arc=23 days, H=17.5 ~1.07 km) from MLS (March 4.36-38p4 at V=21.5-22.1)
- K08CB6J 2008 CJ116 (arc=25 days, H=19.3 ~467m) from Spacewatch 0.9m (March 6.17-20p3)
- K08C01N 2008 CN1 (arc=33 days, H=20.6 ~257m) from Dresden Obs. (March 5.86-87p3) and Herrenberg Obs. (March 6.84p5)
- K08C01L 2008 CL1 (arc=32 days, H=19.5 ~426m) from Dresden Obs. (March 5.91-92p7)
- K07VI3R 2007 VR183 (Q=4.353 AU, arc=172 days, H=17.4 ~1.12 km) from SSS (March 4.44-46p4)
- K07T08G 2007 TG8 (Q=4.306 AU, arc=175 days, H=18.6 ~645m) from MLS (March 6.23-25p4)
- K07E88P 2007 EP88 (q=0.096 AU, arc=2 opp, H=18.5 ~676m) from Mt. John Obs. (March 6.56-58p3)
- K06D62U 2006 DU62 (arc=3 opp, H=18.0 ~851m) from Dresden Obs. (March 5.88-90p4)
- K06BE8A 2006 BA148 (arc=2 opp, H=18.4 ~708m) from Spacewatch 0.9m (March 6.11-15p2)
- K06B55G 2006 BG55 (arc=3 opp, H=18.2 ~776m) from CSS (March 4.32-34p4)
- K05G21P 2005 GP21 (arc=2 opp, H=19.9 ~355m) from MLS (March 6.47-48p4 at V=21.5-22.6)
- K05E00A 2005 EA (arc=2 opp, H=21.0 ~214m) from Naef Obs. (March 5.89p1 & 5.94-95p2)
- K04F32N 2004 FN32 (arc=4 opp, H=18.9 ~562m) from Spacewatch 1.8m (March 6.47-49p2)
- K03E50D 2003 ED50 (arc=3 opp, H=20.8 ~234m) from Spacewatch 1.8m (March 6.17-18p2)
- K03D14C 2003 DC14 (Q=4.510 AU, arc=3 opp, H=16.4 ~1.78 km) from Pla D'Arguines Obs. (March 7.02p4)
- K02T66D 2002 TD66 (arc=4 opp, H=20.3 ~295m) from Atlante Obs. (March 6.95p3)
- K02C26F 2002 CF26 (arc=5 opp, H=17.2 ~1.23 km) from MLS (March 6.23-25p4)
- K00X44K 2000 XK44 (arc=3 opp, H=18.6 ~645m) from Pla D'Arguines Obs. (March 7.02-03p3)
- K00R12N 2000 RN12 (arc=2 opp, H=20.1 ~323m) from MLS (March 6.33-35p4 at V=21.2-22.3)
- J99S05O 1999 SO5 (arc=2 opp, H=20.8 ~234m) from SSS (March 6.48-51p3)
- G4222 164222 2004 RN9 from CSS (March 6.29-31p4) and MLS (March 6.44-46p4)
- G3696 163696 2003 EB50 from CSS (March 4.11-13p4)
- G3249 163249 2002 GT from CSS (March 4.24-26p4)
- G2038 162038 1996 DH from CSS (March 4.20-23p4)
- F4020 154020 2002 CA10 from MLS (March 6.35-37p4 at V=21.0-22.5)
- 53319 53319 1999 JM8 from CSS (March 4.50-52p4)
- 35107 35107 1991 VH from CSS (March 4.49-52p4)
- 09162 9162 1987 OA from Spacewatch 0.9m (March 6.40-44p3)
- 05587 5587 1990 SB from CSS (March 6.19-21p4)
- 03552 3552 Don Quixote (1983 SA) from MLS (March 6.26-28p4)
- 01685 1685 Toro (1948 OA) from CSS (March 6.15-16p4)
- 01036 1036 Ganymed (1924 TD) from Atlante Obs. (March 6.85-86p3)
Observers on 7 March '08
Seventeen observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| H55 | Astronomical Research Obs. (ARO) in Illinois, 2 in MPEC 2008-E59 -- 2008 EO6, 2008 EN6 |
| J51 | Atlante Obs. in the Canary Islands, 2 in MPEC 2008-E59 -- 2002 TD66, 1036 |
| 703 | Catalina Sky Survey (CSS) in Arizona, 15 in MPECs 2008-E59, 2008-E61 & 2008-E64 -- 2008 EQ7, 2008 EN7, 2008 DG5, 2008 BT18, 2008 AF4, 2006 BG55, 2003 TM1, 53319, 35107, 164222, 163696, 163249, 162038, 5587, 1685 |
| 639 | Dresden Obs. in Germany, 3 in MPEC 2008-E59 -- 2008 CN1, 2008 CL1, 2006 DU62 |
| 651 | Grasslands Obs. in Arizona, 3 in MPECs 2008-E61, 2008-E63 & 2008-E64 -- 2008 EQ7, 2008 EP7, 2008 EN7 |
| 240 | Herrenberg Obs. in Germany, 1 in MPEC 2008-E59 -- 2008 CN1 |
| 701 | Junk Bond Obs. in Arizona, 1 in MPEC 2008-E59 -- 2008 EO6 |
| 246 | KLENOT in the Czech Republic, 8 in MPECs 2008-E59, 2008-E60, 2008-E61, 2008-E63, 2008-E64 & 2008-E65 -- 2008 ER7, 2008 EQ7, 2008 EP7, 2008 EN7, 2008 EM7, 2008 EK1, 2008 EJ, 2008 DJ |
| 118 | Modra Obs. in Slovakia, 1 in MPEC 2008-E64 -- 2008 EQ7 |
| 474 | Mt. John Obs. in New Zealand, 3 in MPEC 2008-E59 -- 2008 EK1, 2008 DL5, 2007 EP88 |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 19 in MPECs 2008-E59, 2008-E60, 2008-E61, 2008-E62, 2008-E63, 2008-E64 & 2008-E65 -- 2008 EV5, 2008 ES, 2008 ER7, 2008 EQ7, 2008 EP7, 2008 EO7, 2008 EN7, 2008 EM7, 2008 EM, 2008 EE5, 2008 CM116, 2008 CC175, 2007 TG8, 2005 GP21, 2002 CF26, 2000 RN12, 164222, 154020, 3552 |
| A13 | Naef Obs. in Switzerland, 1 in MPEC 2008-E59 -- 2005 EA |
| 941 | Pla D'Arguines Obs. in Spain, 2 in MPEC 2008-E59 -- 2003 DC14, 2000 XK44 |
| E12 | Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2008-E59 -- 2008 EY5, 2008 EJ1, 2007 VR183, 1999 SO5 |
| H85 | Silver Spring Obs. in Maryland, 2 in MPEC 2008-E59 -- 2008 EK1, 2008 DE |
| 691 | Spacewatch 0.9m telescope in Arizona, 8 in MPECs 2008-E59, 2008-E62 & 2008-E65 -- 2008 ER7, 2008 EO7, 2008 DK5, 2008 CZ21, 2008 CJ116, 2008 AL33, 2006 BA148, 9162 |
| 291 | Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2008-E59, 2008-E60, 2008-E62 & 2008-E65 -- 2008 ER7, 2008 EO7, 2008 EM7, 2008 EK1, 2008 DW, 2008 DL5, 2008 DH23, 2004 FN32, 2003 ED50 |
Impact Risk Monitoring on 7 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 ER7 | JPL Sentry | 2259 | 2011-2054 | 109 | 9.5e-07 | -2.66 | -3.12 | 0 | JPL: "Analysis based on 15 observations spanning 1.0499 days (2008-Mar-06.33608 to 2008-Mar-07.38598)." Diameter approximately 0.366 km. from mean, weighted H=19.9. |
| 2008 EM7 | JPL Sentry | 2201 | 2014-2107 | 146 | 6.3e-07 | -4.06 | -4.59 | 0 | JPL: "Analysis based on 22 observations spanning 1.0957 days (2008-Mar-06.25767 to 2008-Mar-07.35332)." Diameter approximately 0.170 km. from mean, weighted H=21.5. |
| 2008 EL6 | NEODyS | 1538 | 2082-2090 | 2 | 1.21e-08 | -5.80 | -5.80 | 0 | NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2008/03/05.109 to 2008/03/06.529." |
| 2008 EV5 | JPL Sentry | 1538 | 2022-2103 | 16 | 2.6e-08 | -5.37 | -5.96 | 0 | JPL: "Analysis based on 21 observations spanning 1.9851 days (2008-Mar-04.21432 to 2008-Mar-06.19939)." Diameter approximately 0.325 km. from mean, weighted H=20.1. |
| NEODyS | 1538 | R E M O V E D | |||||||
| 2008 EE5 | JPL Sentry | 1538 | 2037-2039 | 3 | 1.1e-09 | -5.55 | -5.89 | 0 | JPL: "Analysis based on 19 observations spanning 2.0236 days (2008-Mar-04.17185 to 2008-Mar-06.19547)." Diameter approximately 0.540 km. from mean, weighted H=19.0. |
| NEODyS | 1538 | R E M O V E D | |||||||
| 2008 AF4 | JPL Sentry | 1756 | 2078-2100 | 8 | 4.3e-05 | -2.04 | -2.15 | 1 | JPL: "Analysis based on 570 observations spanning 55.459 days (2008-Jan-10.39652 to 2008-Mar-05.85535)." Diameter approximately 0.390 km. from mean, weighted H=19.7. |
| NEODyS | 1538 | 2078-2089 | 3 | 3.25e-05 | -2.15 | -2.15 | 1 | NEODyS: "Based on 574 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/03/05.856. NOTE: The Virtual Impactor in 2089/01/09.478 ... is rated as Torino Scale 1." | |
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 7 March '08
Times are UTC for when items were noted or added by The Tracking News.
| 2259 | Noted that JPL Sentry has posted 2008 ER7 as an impact risk - see above |
| 2201 | Noted that JPL Sentry has posted 2008 EM7 as an impact risk - see above |
| 2030 | Grabbed MPEC 2008-E65 - 2008 ER7 - see above |
| 1958 | Grabbed MPEC 2008-E61 - 2008 EN7 - see above Grabbed MPEC 2008-E62 - 2008 EO7 - see above Grabbed MPEC 2008-E63 - 2008 EP7 - see above Grabbed MPEC 2008-E64 - 2008 EQ7 - see above |
| 1859 | Grabbed MPEC 2008-E60 - 2008 EM7 - see above |
| 1756 | Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above |
| 1539 | Grabbed MPEC 2008-E59 - Daily Orbit Update - see above |
| 1538 | Noted that NEODyS has updated its 2008 AF4 risk assessment - see above Noted that JPL Sentry has updated its 2008 EE5 risk assessment - see above Noted that NEODyS has removed 2008 EE5 as an impact risk - see above Noted that NEODyS has posted 2008 EL6 as an impact risk - see above Noted that JPL Sentry has updated its 2008 EV5 risk assessment - see above Noted that NEODyS has removed 2008 EV5 as an impact risk - see above |
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