Tiny 2008 EF32 came from sunward and flew through the Earth-Moon system, passing the Moon Sunday at one-quarter lunar distance (LD) and whipping past Earth yesterday at a distance presently calculated at 0.17 LD. Estimated to be roughly four meters wide, it was first noticed at 0838 UTC this morning by the Mt. Lemmon Survey. See today's MPEC 2008-E91 below and more details. This A/CC illustration depicts the sky at 0000 UTC yesterday.
Contents on 11 March '08
- IAU Minor Planet Center
- NEOCP Activity -- 25 listings: 17 new, 8 updated
- New MPECs -- eleven MPECs
- Observers -- 21 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
- 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 11 March '08
The MPC's NEO Confirmation Page has 25 listings: 17 new, 8 updated
When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had seventeen new and eight updated listings. Of these, 21 were "one nighters." So far The Tracking News has counted a total of 40 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 11 March '08
Minor Planet Electronic Circulars
As of last check at 2354 UTC, there have been eleven MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2008-E87 time-stamped "06:09 UT" - Daily Orbit Update - see below
- MPEC 2008-E88 time-stamped "16:43 UT" - 2008 EA32 - see below
- MPEC 2008-E89 time-stamped "16:47 UT" - 2008 EB32 - see below
- MPEC 2008-E90 time-stamped "16:53 UT" - 2008 EC32 - see below
- MPEC 2008-E91 time-stamped "16:58 UT" - 2008 EF32 - see below
- MPEC 2008-E92 time-stamped "17:05 UT" - 2008 EG32 - see below
- MPEC 2008-E93 time-stamped "22:10 UT" - 2007 UQ13 - see below
- MPEC 2008-E94 time-stamped "23:06 UT" - 2008 EJ68 - see below
- MPEC 2008-E95 time-stamped "23:13 UT" - 2008 EK68 - see below
- MPEC 2008-E96 time-stamped "23:40 UT" - 2008 EL68 - see below
- MPEC 2008-E97 time-stamped "23:44 UT" - 2008 EM68
MPEC 2008-E97 - "23:44 UT" - 2008 EM68
- K08E68M 2008 EM68 (small asteroid, Earth MOID=0.1 LD, H=27.5 ~11m) was discovered at 0602 UT on 8 March by the Mt. Lemmon Survey (MLS), which observed it at March 8.25-36p12. This object is now within ten lunar distances (LD) of Earth, reaching 1.7 LD on 11 March.
MPEC 2008-E96 - "23:40 UT" - 2008 EL68
- K08E68L 2008 EL68 (small asteroid, Earth MOID=0.2 LD, H=27.7 ~10m) was discovered at 0947 UT on 6 March by MLS, which observed it at March 6.41-48p8. This object was within ten lunar distances (LD) of Earth, reaching 7.5 LD on 5 March.
MPEC 2008-E95 - "23:13 UT" - 2008 EK68
- K08E68K 2008 EK68 (small asteroid, Earth MOID=1.8 LD, H=28.6 ~6m) was discovered at 1130 UT on 5 March by MLS, which observed it at March 5.44-48p10. This object was within ten lunar distances (LD) of Earth, reaching 5.6 LD on 5 March.
MPEC 2008-E94 - "23:06 UT" - 2008 EJ68
- K08E68J 2008 EJ68 (small asteroid, Earth MOID=8.6 LD, H=25.9 ~22m) was discovered at 0808 UT on 5 March by MLS, which observed it at March 5.34-43p10 at V=21.5-22.4.
MPEC 2008-E93 - "22:10 UT" - 2007 UQ13
- K07U13Q 2007 UQ13 (H=19.8 ~371m) from NEAT's Mt. Palomar telescope (2002 Oct. 30.46p1, 2002 Oct. 30.51p1, 2002 Nov. 22.27-29p2 & 2002 Dec. 7.19p1)
MPEC 2008-E92 - "17:05 UT" - 2008 EG32
- K08E32G 2008 EG32 (risk-listed, Earth MOID=1.4 LD, H=27.3 ~12m) was discovered at 0914 UT on 11 March by the Catalina Sky Survey (CSS), which observed it at March 11.38-43p8. The discovery was confirmed by MLS (March 11.44p4). This object is now within ten lunar distances (LD) of Earth, reaching 2.6 LD on 9 March.
MPEC 2008-E91 - "16:58 UT" - 2008 EF32
- K08E32F 2008 EF32 (risk-listed, Earth MOID=0.1 LD, H=29.4 ~4m) was discovered at 0838 UT on 11 March by MLS, which observed it at March 11.36-39p4 and 11.45-48p4. This object is now within ten lunar distances (LD) of Earth, reaching 1.1 LD on 10 March.
MPEC 2008-E90 - "16:53 UT" - 2008 EC32
- K08E32C 2008 EC32 (small asteroid, Earth MOID=2.0 LD, H=26.7 ~15m) was discovered at 0634 UT on 10 March by CSS, which observed it at March 10.27-28p4, 10.36-38p4, and 10.47-48p8. The discovery was confirmed by Sabino Canyon Obs. (March 10.36p3), Powell Obs. (March 11.19-20p4), the Spacewatch 1.8m telescope (March 11.27-28p3), and MLS (March 11.36-39p4). This object was within ten lunar distances (LD) of Earth, reaching 2.9 LD on 7 March.
MPEC 2008-E89 - "16:47 UT" - 2008 EB32
- K08E32B 2008 EB32 (H=19.2 ~490m) was discovered at 0601 UT on 10 March by MLS, which observed it at March 10.25-28p4 and 11.22-24p4. The discovery was confirmed by LINEAR (March 10.22-27p5), Alter Satzberg Obs. (March 10.82-85p3), and Sabino Canyon Obs. (March 11.26p1).
MPEC 2008-E88 - "16:43 UT" - 2008 EA32
- K08E32A 2008 EA32 (IEO, Q=0.806 AU, H=16.3 ~1.86 km) was discovered at 0227 UT on 10 March by CSS, which observed it at March 10.10-12p4 and 11.10-11p4. The discovery was confirmed by Modra Obs. (March 10.76-78p7), Alter Satzberg Obs. (March 10.79-80p4), MLS (March 11.11-12p4), and Sabino Canyon Obs. (March 11.13p2).
<< DOU on 11 Mar. '08 >> MPEC 2008-E87 - "06:09 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K08A04F 2008 AF4 (arc=59 days, H=19.7 ~389m) from CSS (March 9.25-27p4)
- Observations of recently (no longer) risk-listed objects
- K08E08D 2008 ED8 (small asteroid, arc=3 days, H=24.1 ~51m) from Stammersdorf Obs. (March 10.93-96p14) and Alter Satzberg Obs. (March 10.96p7)
- K08E06N 2008 EN6 (arc=5 days, H=19.1 ~513m) from MLS (March 10.32-34p4)
- K08E06L 2008 EL6 (arc=4 days, H=20.8 ~234m) from LAMP Obs. (March 9.14-15p4)
- K08E01K 2008 EK1 (i=39.4°, arc=6 days, H=20.3 ~295m) from CSS (March 10.29-31p3)
- K08E00S 2008 ES (Q=4.041 AU, arc=8 days, H=18.2 ~776m) from CSS (March 10.41-43p4)
- K08D05K 2008 DK5 (arc=11 days, H=21.4 ~178m) from Greiner Research Obs. (GRO) (March 8.37-41p53), Klet Obs. (March 10.08-09p8), and LINEAR (March 10.33-38p5)
- K08CB9G 2008 CG119 (i=41.3°, arc=26 days, H=19.0 ~537m) from the Siding Spring Survey (SSS) (March 10.49-50p2)
- K08CB8R 2008 CR118 (arc=29 days, H=18.7 ~616m) from CSS (March 10.31-33p4)
- K08C22D 2008 CD22 (small asteroid, arc=30 days, H=22.2 ~123m) from Klet Obs. (March 10.07p7)
- Observations of small asteroids (H>22.0)
- K08E09F 2008 EF9 (arc=29 days, H=22.5 ~107m) from LINEAR (March 10.21-26p5) and Junk Bond Obs. (March 10.30-33p4)
- K08E09E 2008 EE9 (arc=2 days, H=22.4 ~112m) from SSS (March 10.65-68p4)
- K08E07P 2008 EP7 (arc=4 days, H=23.4 ~71m) from CSS (March 10.36-38p4)
- K08E00P 2008 EP (arc=8 days, H=24.2 ~49m) from LINEAR (March 10.27-38p9)
- K08E00L 2008 EL (arc=27 days, H=22.4 ~112m) from Klet Obs. (March 10.02-03p14)
- K07P09Q 2007 PQ9 (arc=151 days, H=22.2 ~123m) from David Tholen's team on Mauna Kea (Jan. 9.32p2 at R=23.1-3)
- K05EG9Y 2005 EY169 (arc=2 opp, H=22.2 ~123m) from Klet Obs. (March 10.05-06p12) and LINEAR (March 10.27-38p10)
- Observations of other objects
- K08E09M 2008 EM9 (q=0.272 AU, arc=1 day, H=17.2 ~1.23 km) from Junk Bond Obs. (March 10.43-47p4) and SSS (March 10.79-80p3)
- K08E06P 2008 EP6 (arc=5 days, H=19.4 ~446m) from SSS (March 10.50-51p2)
- K08E05Y 2008 EY5 (q=0.235 AU, arc=6 days, H=20.1 ~323m) from SSS (March 10.40p2)
- K08E01J 2008 EJ1 (i=38.7°, arc=8 days, H=15.8 ~2.34 km, q=0.982 AU) from SSS (March 10.64p2)
- K08E00J 2008 EJ (i=39.8°, arc=8 days, H=20.1 ~323m) from CSS (March 8.29-31p4)
- K08CB8Z 2008 CZ118 (arc=25 days, H=18.4 ~708m) from CSS (March 8.35-37p4)
- K08CB6S 2008 CS116 (Q=4.556 AU, arc=118 days, H=20.8 ~234m) from the Spacewatch 0.9m telescope (March 10.28-31p3)
- K08C72L 2008 CL72 (arc=36 days, H=19.8 ~371m) from CSS (March 10.29-31p4)
- K08C01N 2008 CN1 (arc=37 days, H=20.6 ~257m) from LINEAR (March 10.22-25p4)
- K08C01L 2008 CL1 (arc=37 days, H=19.5 ~426m) from Urseanu Obs. (March 9.88-91p4) and Hamamatsu-Yuto Obs. (March 10.50-57p6)
- K08B22C 2008 BC22 (arc=59 days, H=19.9 ~355m) from Spacewatch 0.9m (March 10.27-31p3)
- K08A28T 2008 AT28 (arc=59 days, H=18.5 ~676m) from MLS (March 9.20-21p4)
- K08A26U 2008 AU26 (arc=71 days, H=20.9 ~224m) from MLS (March 10.22-24p4)
- K07U13Q 2007 UQ13 (arc=120 days, H=19.8 ~371m) from Tholen et al. (Feb. 27.28-29p2 at R=23.2)
- K07T08G 2007 TG8 (Q=4.306 AU, arc=179 days, H=18.6 ~645m) from CSS (March 10.31-33p4)
- K07Q03E 2007 QE3 (Q=4.044 AU, arc=2 opp, H=19.9 ~355m) from MLS (March 9.27-29p4 at V=21.2-22.6)
- K05T45U 2005 TU45 (arc=3 opp, H=17.0 ~1.35 km) from Petit Jean Mtn. South Obs. (PJMSO) (March 10.07-08p5)
- K05E70K 2005 EK70 (arc=4 opp, H=17.4 ~1.12 km) from LINEAR (March 10.10-15p10), PJMSO (March 10.10-11p5), Hamamatsu-Yuto Obs. (March 10.49p1 & 10.54p2), and GRO (March 11.07-08p5)
- K04C02R 2004 CR2 (arc=2 opp, H=19.4 ~446m) from LINEAR (March 10.39-43p4)
- K03G00W 2003 GW (i=49.4°, arc=3 opp, H=16.7 ~1.55 km) from SSS (March 10.57-60p4)
- K02T66D 2002 TD66 (arc=4 opp, H=20.3 ~295m) from Urseanu Obs. (March 9.92-94p3) and LINEAR (March 10.34-38p5)
- K02C26F 2002 CF26 (arc=5 opp, H=17.2 ~1.23 km) from CSS (March 10.29-31p4)
- K00DA7P 2000 DP107 (arc=4 opp, H=18.2 ~776m) from CSS (March 10.32-33p4)
- J99T10A 1999 TA10 (arc=3 opp, H=18.0 ~851m) from SSS (March 10.57-60p4)
- H7049 177049 2003 EE16 from MLS (March 8.21-22p4)
- H5921 175921 2000 DM1 from LINEAR (March 10.34-39p5)
- H5189 175189 2005 EC224 from Spacewatch 0.9m (March 7.17-21p6)
- H2034 172034 2001 WR1 from SSS (March 10.71-73p3)
- H0891 170891 2004 TY16 from LINEAR (March 10.22-26p5)
- G4202 164202 2004 EW from CSS (March 10.49-50p3)
- G2038 162038 1996 DH from Goodricke-Pigott Obs. (March 8.17-20p3) and LINEAR (March 10.30-33p3)
- E2561 142561 2002 TX68 from MLS (March 10.19-21p4)
- D8205 138205 2000 EZ148 from Spacewatch 0.9m (March 7.22-25p3) and LINEAR (March 10.40-44p4)
- D8127 138127 2000 EE14 from GRO (March 11.04-05p7)
- D8013 138013 2000 CN101 from LINEAR (March 10.23-27p5)
- 96189 96189 1991 NT3 from LINEAR (March 10.10-15p9)
- 86667 86667 2000 FO10 from SSS (March 10.70-72p3)
- 85990 85990 1999 JV6 from CSS (March 10.41-44p4)
- 54686 54686 2001 DU8 from LINEAR (March 10.23-27p5)
- 22099 22099 2000 EX106 from CSS (March 10.29-31p4)
- 21277 21277 1996 TO5 from CSS (March 7.12-13p4)
- 13553 13553 1992 JE from Spacewatch 0.9m (March 10.27-31p3)
- 09400 9400 1994 TW1 from LINEAR (March 10.38-43p5)
- 09162 9162 1987 OA from Spacewatch 0.9m (March 10.34-37p3)
- 06037 6037 1988 EG from GRO (March 11.05-06p11)
- 05587 5587 1990 SB from LINEAR (March 10.16-21p10)
- 05131 5131 1990 BG from GRO (March 11.05p4)
- 01916 1916 Boreas (1953 RA) from SSS (March 10.76-78p4)
- 01864 1864 Daedalus (1971 FA) from CSS (March 7.27-31p4 & 10.27-28p4)
- 01685 1685 Toro (1948 OA) from LINEAR (March 10.23-26p4) and GRO (March 11.08p3)
- 01620 1620 Geographos (1951 RA) from LINEAR (March 10.28-32p5) and Stammersdorf Obs. (March 10.90-92p8)
- 00719 719 Albert (1911 MT) from MLS (March 8.23-29p8)
Observers on 11 March '08
A total of 21 observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| B03 | Alter Satzberg Obs. in Austria, 3 in MPECs 2008-E87, 2008-E88 & 2008-E89 -- 2008 ED8, 2008 EB32, 2008 EA32 |
| 703 | Catalina Sky Survey (CSS) in Arizona, 19 in MPECs 2008-E87, 2008-E88, 2008-E90 & 2008-E92 -- 2008 ES, 2008 EP7, 2008 EK1, 2008 EJ, 2008 EG32, 2008 EC32, 2008 EA32, 2008 CZ118, 2008 CR118, 2008 CL72, 2008 AF4, 2007 TG8, 2002 CF26, 2000 DP107, 85990, 22099, 21277, 164202, 1864 |
| 683 | Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-E87 -- 162038 |
| H51 | Greiner Research Obs. (GRO) in Wisconsin, 6 in MPEC 2008-E87 -- 2008 DK5, 2005 EK70, 138127, 6037, 5131, 1685 |
| 379 | Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2008-E87 -- 2008 CL1, 2005 EK70 |
| 701 | Junk Bond Obs. in Arizona, 2 in MPEC 2008-E87 -- 2008 EM9, 2008 EF9 |
| 046 | Klet Obs. in the Czech Republic, 4 in MPEC 2008-E87 -- 2008 EL, 2008 DK5, 2008 CD22, 2005 EY169 |
| G88 | LAMP Obs. in Arizona, 1 in MPEC 2008-E87 -- 2008 EL6 |
| 704 | LINEAR in New Mexico, 20 in MPECs 2008-E87 & 2008-E89 -- 2008 EP, 2008 EF9, 2008 EB32, 2008 DK5, 2008 CN1, 2005 EY169, 2005 EK70, 2004 CR2, 2002 TD66, 96189, 54686, 175921, 170891, 162038, 138205, 138013, 9400, 5587, 1685, 1620 |
| 5682 | David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2008-E87 -- 2007 UQ13, 2007 PQ9 |
| 118 | Modra Obs. in Slovakia, 1 in MPEC 2008-E88 -- 2008 EA32 |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 16 in MPECs 2008-E87, 2008-E88, 2008-E89, 2008-E90, 2008-E91, 2008-E92, 2008-E94, 2008-E95, 2008-E96 & 2008-E97 -- 2008 EN6, 2008 EM68, 2008 EL68, 2008 EK68, 2008 EJ68, 2008 EG32, 2008 EF32, 2008 EC32, 2008 EB32, 2008 EA32, 2008 AU26, 2008 AT28, 2007 QE3, 177049, 142561, 719 |
| 644 | NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2008-E93 -- 2007 UQ13 |
| H45 | Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2008-E87 -- 2005 TU45, 2005 EK70 |
| 649 | Powell Obs. in Kansas, 1 in MPEC 2008-E90 -- 2008 EC32 |
| 854 | Sabino Canyon Obs. in Arizona, 3 in MPECs 2008-E88, 2008-E89 & 2008-E90 -- 2008 EC32, 2008 EB32, 2008 EA32 |
| E12 | Siding Spring Survey (SSS) in New South Wales, 11 in MPEC 2008-E87 -- 2008 EY5, 2008 EP6, 2008 EM9, 2008 EJ1, 2008 EE9, 2008 CG119, 2003 GW, 1999 TA10, 86667, 172034, 1916 |
| 691 | Spacewatch 0.9m telescope in Arizona, 6 in MPEC 2008-E87 -- 2008 CS116, 2008 BC22, 175189, 138205, 13553, 9162 |
| 291 | Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2008-E90 -- 2008 EC32 |
| A97 | Stammersdorf Obs. in Austria, 2 in MPEC 2008-E87 -- 2008 ED8, 1620 |
| A92 | Urseanu Obs. in Romania, 2 in MPEC 2008-E87 -- 2008 CL1, 2002 TD66 |
Impact Risk Monitoring on 11 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 EG32 | JPL Sentry | 2355 | 2022-2107 | 147 | 1.8e-07 | -7.86 | -8.55 | 0 | JPL: "Analysis based on 12 observations spanning .05654 days (2008-Mar-11.38484 to 2008-Mar-11.44138)." Diameter approximately 0.012 km. from mean, weighted H=27.3. |
| 2008 EF32 | JPL Sentry | 1930 | 2011-2083 | 5 | 7.3e-08 | -9.02 | -9.41 | 0 | JPL: "Analysis based on 8 observations spanning .12271 days (2008-Mar-11.35979 to 2008-Mar-11.4825)." Diameter approximately 0.004 km. from mean, weighted H=29.4. |
| 2008 EA9 | NEODyS | 1748 | 2041-2089 | 33 | 2.19e-05 | -6.30 | -6.92 | 0 | NEODyS: "Based on 22 optical observations (of which 1 are rejected as outliers) from 2008/03/06.406 to 2008/03/10.408." |
| 2008 AF4 | JPL Sentry | 1514 | 2078-2099 | 6 | 4.3e-05 | -2.03 | -2.10 | 1 | JPL: "Analysis based on 579 observations spanning 58.874 days (2008-Jan-10.39652 to 2008-Mar-09.27031)." Diameter approximately 0.390 km. from mean, weighted H=19.7. |
| NEODyS | 1448 | 2078-2089 | 3 | 3.57e-05 | -2.11 | -2.11 | 1 | NEODyS: "Based on 583 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/03/09.271. NOTE: The Virtual Impactor in 2089/01/09.479 ... 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 11 March '08
Times are UTC for when items were noted or added by The Tracking News.
| 2355 | Noted that JPL Sentry has posted 2008 EG32 as an impact risk - see above |
| 2354 | Grabbed MPEC 2008-E94 - 2008 EJ68 - see above Grabbed MPEC 2008-E95 - 2008 EK68 - see above Grabbed MPEC 2008-E96 - 2008 EL68 - see above Grabbed MPEC 2008-E97 - 2008 EM68 - see above |
| 2237 | Grabbed MPEC 2008-E93 - 2007 UQ13 - see above |
| 1930 | Noted that JPL Sentry has posted 2008 EF32 as an impact risk - see above |
| 1748 | Noted that NEODyS has posted 2008 EA9 as an impact risk - see above Grabbed MPEC 2008-E88 - 2008 EA32 - see above Grabbed MPEC 2008-E89 - 2008 EB32 - see above Grabbed MPEC 2008-E90 - 2008 EC32 - see above Grabbed MPEC 2008-E91 - 2008 EF32 - see above Grabbed MPEC 2008-E92 - 2008 EG32 - see above |
| 1514 | Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above |
| 1448 | Noted that NEODyS has updated its 2008 AF4 risk assessment - see above Grabbed MPEC 2008-E87 - Daily Orbit Update - see above |
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