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Contents  on 1 April '08

• IAU Minor Planet Center
  • NEOCP Activity -- five listings: 5 updated
  • New MPECs -- nine MPECs
• Observers -- nineteen observing facilities
• Impact Risk Monitoring -- seven 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 1 April '08

The MPC's NEO Confirmation Page has 5 listings: 5 updated

When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had five updated listings. Of these, four were "one nighters." So far The Tracking News has counted a total of seventeen 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.

<<   Top | Contents | NEOCP | MPECs | Observers | Risks | Chronology | Index   >>

New MPECs  on 1 April '08

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there have been nine MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

• MPEC 2008-G01 time-stamped "00:29 UT" - 2007 HR - see below
• MPEC 2008-G02 time-stamped "06:07 UT" - Daily Orbit Update - see below
• MPEC 2008-G03 time-stamped "14:07 UT" - 2004 FG11 - see below
• MPEC 2008-G04 time-stamped "14:16 UT" - 2008 FJ7 - see below
• MPEC 2008-G05 time-stamped "14:19 UT" - 2008 FK7 - see below
• MPEC 2008-G06 time-stamped "14:22 UT" - 2008 FL7 - see below
• MPEC 2008-G07 time-stamped "21:19 UT" - 2008 GD - see below
• MPEC 2008-G08 time-stamped "22:14 UT" - 2008 GE - see below
• MPEC 2008-G09 time-stamped "23:11 UT" - 2008 GF

MPEC 2008-G09 - "23:11 UT" - 2008 GF

• K08G00F   2008 GF (H=20.5 ~269m) was discovered at 0438 UT on 1 April by the Spacewatch 0.9m telescope, which observed it at April 1.19-23p3. The discovery was confirmed by Sabino Canyon Obs. (April 1.29-30p3), the Spacewatch 1.8m telescope (April 1.30-31p3), Dave Balam via Plaskett 1.8m Telescope (April 1.34p3), and Great Shefford Obs. (April 1.91-93p3).

MPEC 2008-G08 - "22:14 UT" - 2008 GE

• K08G00E   2008 GE (small asteroid, H=23.1 ~81m) was discovered at 0555 UT on 1 April by the Mt. Lemmon Survey (MLS), which observed it at April 1.25-26p4 and 1.37-38p3. The discovery was confirmed by Balam/Plaskett (April 1.37p3), Sabino Canyon Obs. (April 1.37-39p3), and Great Shefford Obs. (April 1.86-88p3).

MPEC 2008-G07 - "21:19 UT" - 2008 GD

• K08G00D   2008 GD (q=0.236 AU, H=19.4 ~446m) was discovered at 0508 UT on 1 April by MLS, which observed it at April 1.21-24p4. The discovery was confirmed by Sabino Canyon Obs. (April 1.32-33p3), Balam/Plaskett (April 1.36p3), Jim Young via Table Mtn. Obs. (April 1.40-41p3), San Marcello Pistoiese Obs. (April 1.78-79p3), Modra Obs. (April 1.81p3), Schiaparelli Obs. (April 1.82-83p2), and Great Shefford Obs. (April 1.84-85p2).

MPEC 2008-G06 - "14:22 UT" - 2008 FL7

• K08F07L   2008 FL7 (risk-listed, H=24.5 ~43m) was discovered at 1039 UT on 31 March by MLS, which observed it at March 31.44-49p8 and April 1.44-46p4.

MPEC 2008-G05 - "14:19 UT" - 2008 FK7

• K08F07K   2008 FK7 (risk-listed, H=23.2 ~78m) was discovered at 0938 UT on 31 March by MLS, which observed it at March 31.40-46p6 at V=21.6-22.2 and April 1.40-42p4 at V=21.0-21.9. The discovery was confirmed by Spacewatch 1.8m (April 1.37p3).

MPEC 2008-G04 - "14:16 UT" - 2008 FJ7

• K08F07J   2008 FJ7 (small asteroid, Earth MOID=3.1 LD, H=25.8 ~23m) was discovered at 0907 UT on 31 March by MLS, which observed it at March 31.38-44p8 and April 1.32-34p4. This object was within ten lunar distances (LD) of Earth, reaching 8.7 LD on 25 March.

MPEC 2008-G03 - "14:07 UT" - 2004 FG11

• K04F11G   2004 FG11 (Earth MOID=8.4 LD, H=20.8 ~234m) from the Catalina Sky Survey (CSS) (March 30.43-50p10), Tiki Obs. (March 30.62p2), Modra Obs. (March 31.14-15p2), Sabino Canyon Obs. (March 31.30-31p2), Young/Table Mtn. (April 1.37-39p4), and Balam/Plaskett (April 1.49p3)

<< DOU on 1 Apr. '08 >>  MPEC 2008-G02 - "06:07 UT" - Daily Orbit Update

• Observations of risk-listed objects
• K08F05W   2008 FW5 (almost small, arc=3 days, H=21.8 ~148m) from Spacewatch 1.8m (March 31.38p2)
• K08F05F   2008 FF5 (small asteroid, q=0.081 AU, Q=4.349 AU, arc=4 days, H=23.1 ~81m) from Spacewatch 1.8m (March 31.25-26p3) and KLENOT (March 31.85-86p5)
• K08F00N   2008 FN (i=46.9°, arc=5 days, H=18.3 ~741m) from Spacewatch 1.8m (March 31.37-38p3) and Modra Obs. (April 1.12-13p3)
• K08E09A   2008 EA9 (small asteroid, arc=25 days, H=27.7 ~10m) from Spacewatch 1.8m (March 31.26-27p3)
• Observations of recently (no longer) risk-listed objects
• K08F00K   2008 FK (small asteroid, arc=4 days, H=27.4 ~11m) from Spacewatch 1.8m (March 31.27-28p2)
• K08E00S   2008 ES (Q=4.037 AU, arc=2 opp, H=18.2 ~776m) from CSS (March 30.30-32p4)
• Observations of small asteroids (H>22.0)
• K08F00O   2008 FO (arc=5 days, H=23.2 ~78m) from KLENOT (March 31.80p7)
• K08E90R   2008 ER90 (arc=17 days, H=24.2 ~49m) from David Tholen's team on Mauna Kea (March 28.32-33p2 at R=22.4-8)
• K08E85E   2008 EE85 (arc=18 days, H=22.7 ~98m) from KLENOT (March 31.79p6)
• K08E09E   2008 EE9 (arc=22 days, H=22.4 ~112m) from Spacewatch 1.8m (March 28.18-22p6 & 30.24-25p3) and Spacewatch 0.9m (March 30.20-23p3)
• K08E05W   2008 EW5 (arc=24 days, H=24.1 ~51m) from Great Shefford Obs. (March 27.08-10p2)
• K08C22D   2008 CD22 (arc=51 days, H=22.1 ~129m) from MLS (March 31.28-31p3)
• Observations of other objects
• K08E85M   2008 EM85 (arc=18 days, H=19.8 ~371m) from Modra Obs. (April 1.09-10p4)
• K08E32A   2008 EA32 (IEO, Q=0.804 AU, arc=22 days, H=16.3 ~1.86 km) from the SZTE Asteroid Program (SZTE) (March 31.76-77p3) and MLS (April 1.11p3)
• K08E07T   2008 ET7 (arc=25 days, H=21.0 ~214m) from Spacewatch 0.9m (March 28.18-22p3) and MLS (March 28.20-21p4)
• K08D00E   2008 DE (arc=49 days, H=19.4 ~446m) from La Fecha Obs. (March 31.98-06p4)
• K08CB8Z   2008 CZ118 (arc=46 days, H=18.4 ~708m) from CSS (March 29.26-28p4)
• K08C22B   2008 CB22 (arc=51 days, H=19.6 ~407m) from CSS (March 29.22-24p3)
• K08B18T   2008 BT18 (arc=59 days, H=18.3 ~741m) from CSS (March 30.19-22p4)
• K07X03T   2007 XT3 (arc=117 days, H=21.5 ~170m) from Spacewatch 1.8m (March 31.41p2)
• K07V04Q   2007 VQ4 (arc=3 opp, H=15.8 ~2.34 km, q=1.271 AU) from Atlante Obs. (March 31.95-96p3)
• K07T24U   2007 TU24 (arc=170 days, H=20.3 ~295m) from CSS (March 29.23-25p4)
• K06B55G   2006 BG55 (arc=3 opp, H=18.4 ~708m) from Crni Vrh Obs. (March 30.87-90p4)
• K05G59E   2005 GE59 (arc=3 opp, H=18.0 ~851m) from Spacewatch 0.9m (March 31.29-33p3)
• K05B02E   2005 BE2 (arc=2 opp, H=18.2 ~776m) from La Fecha Obs. (March 31.94-96p3)
• K04F32N   2004 FN32 (arc=4 opp, H=19.0 ~537m) from MLS (March 31.45-46p4)
• J98S35F   1998 SF35 (arc=5 opp, H=17.7 ~977m) from BDI Obs. (March 30.54p1, 30.60p1 & 31.57p1)
• I0186   180186 2003 QZ30 from MLS (March 31.33-35p3)
• F3591   153591 2001 SN263 from Atlante Obs. (March 30.98p1 & 31.03-04p2)
• 05836   5836 1993 MF from Atlante Obs. (March 31.05-06p3)
• 03288   3288 Seleucus (1982 DV) from Atlante Obs. (March 30.90-91p3)
• 01864   1864 Daedalus (1971 FA) from Atlante Obs. (March 31.01-02p3)

MPEC 2008-G01 - "00:29 UT" - 2007 HR

• K07H00R   2007 HR (q=0.276 AU, H=20.7 ~245m) from CSS (March 30.37-42p6 & 30.49-50p3), Tiki Obs. (March 30.53-58p3), Great Shefford Obs. (March 30.97-98p3), Modra Obs. (March 31.11p2), Sabino Canyon Obs. (March 31.26-27p3), MLS (March 31.31-32p4), and KLENOT (March 31.88p3)

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Observers  on 1 April '08

Nineteen observing facilities appear in today's MPECs.

<<   Top | Contents | NEOCP | MPECs | Observers | Risks | Chronology | Index   >>

Impact Risk Monitoring  on 1 April '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 1 April '08

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