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Contents  on 28 March '08

• IAU Minor Planet Center
  • NEOCP Activity -- six listings: 6 updated
  • New MPECs -- nine MPECs
• Observers -- fourteen observing facilities
• Impact Risk Monitoring -- two 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.

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NEOCP Activity  on 28 March '08

The MPC's NEO Confirmation Page has 6 listings: 6 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had six updated listings. Of these, five were "one nighters." So far The Tracking News has counted a total of sixteen 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.

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New MPECs  on 28 March '08

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there have been nine MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

• MPEC 2008-F40 time-stamped "06:07 UT" - Daily Orbit Update - see below
• MPEC 2008-F41 time-stamped "15:10 UT" - 2008 FG - see below
• MPEC 2008-F42 time-stamped "15:27 UT" - 2008 FH - see below
• MPEC 2008-F43 time-stamped "15:33 UT" - 2008 FJ - see below
• MPEC 2008-F44 time-stamped "15:38 UT" - 2008 FK - see below
• MPEC 2008-F45 time-stamped "15:41 UT" - 2008 FM - see below
• MPEC 2008-F46 time-stamped "15:46 UT" - 2008 FN - see below
• MPEC 2008-F47 time-stamped "16:20 UT" - 2008 FO - see below
• MPEC 2008-F48 time-stamped "16:52 UT" - 2008 FP

MPEC 2008-F48 - "16:52 UT" - 2008 FP

• K08F00P   2008 FP (small asteroid, q=0.317 AU, Earth MOID=0.5 LD, H=26.5 ~17m) was discovered at 0832 UT on 28 March by the Mt. Lemmon Survey (MLS), which observed it at March 28.36-40p8. The discovery was confirmed by Sabino Canyon Obs. (March 28.39p3) and Tiki Obs. (March 28.49-51p2). This object will be coming within ten lunar distances (LD) of Earth, reaching 0.5 LD on 29 March (INTRUDER).

MPEC 2008-F47 - "16:20 UT" - 2008 FO

• K08F00O   2008 FO (small asteroid, Earth MOID=1.5 LD, H=23.2 ~78m) was discovered at 0709 UT on 27 March by LINEAR, which observed it at March 27.30-35p5. The discovery was confirmed by MLS (March 28.11p4), Grasslands Obs. (March 28.16p3), Jim Young via Table Mtn. Obs. (March 28.18-21p4), Greiner Research Obs. (GRO) (March 28.20-21p9), Heath Rhoades via Table Mtn. Obs. (March 28.27p1), and Tiki Obs. (March 28.37-41p3).

MPEC 2008-F46 - "15:46 UT" - 2008 FN

• K08F00N   2008 FN (i=46.6°, Q=4.204 AU, Earth MOID=5.8 LD, H=18.1 ~812m) was discovered at 1101 UT on 27 March by MLS, which observed it at March 27.46-50p8 and 28.46-47p3. The discovery was confirmed by the Spacewatch 1.8m telescope (March 28.45-46p3).

MPEC 2008-F45 - "15:41 UT" - 2008 FM

• K08F00M   2008 FM (small asteroid, H=24.7 ~39m) was discovered at 0624 UT on 27 March by MLS, which observed it at March 27.27-33p8 and 28.22-24p4. The discovery was confirmed by Spacewatch 1.8m (March 28.26-27p2).

MPEC 2008-F44 - "15:38 UT" - 2008 FK

• K08F00K   2008 FK (risk-listed, Earth MOID=0.2 LD, H=27.3 ~12m) was discovered at 0603 UT on 27 March by the Spacewatch 0.9m telescope, which observed it at March 27.25-28p3. The discovery was confirmed by Spacewatch 1.8m (March 27.34-35p3, 27.43p3 & 28.28p2). This object was within ten lunar distances (LD) of Earth, reaching 4.8 LD on 25 March.

MPEC 2008-F43 - "15:33 UT" - 2008 FJ

• K08F00J   2008 FJ (small asteroid, H=24.8 ~37m) was discovered at 0549 UT on 27 March by MLS, which observed it at March 27.24-33p7 and 28.27p4.

MPEC 2008-F42 - "15:27 UT" - 2008 FH

• K08F00H   2008 FH (small asteroid, Earth MOID=7.0 LD, H=24.1 ~51m) was discovered at 0457 UT on 27 March by MLS, which observed it at March 27.21-26p8. The discovery was confirmed by Spacewatch 1.8m (March 28.15-16p3) and Grasslands Obs. (March 28.18-19p2).

MPEC 2008-F41 - "15:10 UT" - 2008 FG

• K08F00G   2008 FG (i=50.5°, H=19.2 ~490m) was discovered at 0319 UT on 27 March by Spacewatch 0.9m, which observed it at March 27.14-17p3. The discovery was confirmed by Spacewatch 1.8m (March 27.23-24p3 & 28.14-15p3) and Grasslands Obs. (March 28.21p2).

<< DOU on 28 Mar. '08 >>  MPEC 2008-F40 - "06:07 UT" - Daily Orbit Update

• Observations of risk-listed objects
• K08E09A   2008 EA9 (small asteroid, arc=21 days, H=27.7 ~10m) from Spacewatch 1.8m (March 27.26-27p3)
• Observations of recently (no longer) risk-listed objects
• K08E68V   2008 EV68 (small asteroid, arc=14 days, H=23.7 ~62m) from Astronomical Research Obs. (ARO) (March 25.15-17p3)
• K08E07M   2008 EM7 (arc=19 days, H=21.2 ~195m) from ARO (March 25.12-14p2 at V=22.1)
• K08D22W   2008 DW22 (small asteroid, arc=28 days, H=25.6 ~26m) from Spacewatch 1.8m (March 27.47-48p3)
• Observations of small asteroids (H>22.0)
• K08E85E   2008 EE85 (arc=13 days, H=22.7 ~98m) from Madonna di Dossobuono Obs. (March 25.91p3)
• K08E05W   2008 EW5 (arc=23 days, H=24.1 ~51m) from Spacewatch 1.8m (March 27.41-42p3)
• K08D00X   2008 DX (arc=30 days, H=23.8 ~59m) from Spacewatch 1.8m (March 27.45-46p2)
• Observations of other objects
• K08E85M   2008 EM85 (arc=12 days, H=19.7 ~389m) from Hormersdorf Obs. (March 26.85p3)
• K08E09J   2008 EJ9 (i=40.6°, arc=4 days, H=21.0 ~214m) from EURONEAR via La Silla (March 13.34-35p7)
• K08E09B   2008 EB9 (arc=19 days, H=20.4 ~282m) from ARO (March 25.09-10p3)
• K08E05Y   2008 EY5 (q=0.234 AU, arc=21 days, H=20.1 ~323m) from ARO (March 25.05p3)
• K08D23H   2008 DH23 (arc=27 days, H=19.7 ~389m) from Spacewatch 1.8m (March 27.25-26p3)
• K08B22C   2008 BC22 (arc=76 days, H=19.8 ~371m) from LINEAR (March 27.37-42p5)
• K07P25H   2007 PH25 (i=53.2°, Q=4.605 AU, arc=2 opp, H=16.6 ~1.62 km) from Spacewatch 1.8m (March 27.49-50p3)
• K05M13P   2005 MP13 (arc=2 opp, H=19.8 ~371m) from Spacewatch 1.8m (March 27.44-45p3)
• K04C02R   2004 CR2 (arc=2 opp, H=19.4 ~446m) from Spacewatch 0.9m (March 27.18-22p3)
• H9806   179806 2002 TD66 from LINEAR (March 27.33-35p3)
• H7049   177049 2003 EE16 from MLS (March 27.18-20p4)
• G2173   162173 1999 JU3 from EURONEAR/La Silla (March 13.04-05p8)
• D8205   138205 2000 EZ148 from Spacewatch 0.9m (March 27.19-23p3)
• D6618   136618 1994 CN2 from Spacewatch 0.9m (March 27.19-23p3)
• 86667   86667 2000 FO10 from LINEAR (March 27.43-48p4)
• 11054   11054 1991 FA from Spacewatch 0.9m (March 27.41-45p3)
• 09400   9400 1994 TW1 from LINEAR (March 27.37-42p5)
• 05836   5836 1993 MF from LINEAR (March 27.37-42p5)
• 03552   3552 Don Quixote (1983 SA) from Spacewatch 0.9m (March 27.13-16p3)
• 03288   3288 Seleucus (1982 DV) from LINEAR (March 27.19-23p5)
• 01620   1620 Geographos (1951 RA) from Sabadell Obs. (March 17.84p1 & 20.82p1)

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Observers  on 28 March '08

Fourteen observing facilities appear in today's MPECs.

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Impact Risk Monitoring  on 28 March '08

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.

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Chronology  on 28 March '08

Times are UTC for when items were noted or added by The Tracking News.