Peter Birtwhistle says he is "quite looking forward to mid-June when 6R10DB9 comes rushing through one last time." He caught it before, as seen in this imagery from March 20th. "It" is believed to be a tiny asteroid that has been a temporary satellite of the Earth. See Friday's report about the radar observations planned for its passage at 0.7 lunar distance this month on the way back into heliocentric orbit.
About this image: It comes from a composite of 176 six-second exposures made over a period of 17 minutes and 36 seconds. The object was moving at 24"/min. in PA 357° (upward) at magnitude R=19.3 and fading. The inset has the pixels doubled to twice size. ©Copyright 2007 Great Shefford Observatory, where you will find more info.
Contents on 3 June '07
- Minor-Object News -- two items
- Minor-Object Science -- three papers
- IAU Minor Planet Center
- Impact Risk Monitoring -- nothing to report
WELCOME to A/CC's prototype daily news publication designed to be the viewing end of a planned autonomous 24-hour news service. The new tools and this publication format are working well enough now to share with readers. It is expected that this approach will require less time to maintain than our previous news and small asteroid pages, which were retired on May 14th. There's still more development ahead and there probably will be some glitches along the way, but this is what's needed to keep up with the increasing pace of minor-object news. The CRT page will be maintained separately for a little while longer, until all of this is working smoothly. And the CRT and small-asteroid ephemerides will be kept going.
Minor-Object News on 3 June '07
- "Flying telescope tests near," Los Angeles Daily News 2 June - Quote: "After ... a couple of checkout flights in Waco, Texas, a heavily modified Boeing 747 carrying a 45,000-pound telescope arrived at Dryden on Thursday to begin its flight-test program... For three to four years, Dryden will be expanding the aircraft's flight envelope and conducting some initial science experiments."
- "Retirement seems likely for rocket made in Decatur; ULA hopeful," The Decatur Daily 3 June - Quote: "A cosmic workhorse ... may be nearing retirement, and the U.S. scientific community is concerned... The Delta II, a medium-lift, satellite-launch rocket ... may be phased out in two years... On June 30, ULA will launch the asteroid-bound Dawn spacecraft [with a Delta II]."
Minor-Object Science on 3 June '07
- "Anatomy of an isotopically primitive interplanetary dust particle: Coordinated NanoSIMS and Auger Nanoprobe analyses" by Floss, C. with F.J. Stadermann, A. Mertz & T. Bernatowicz, abstract & PDF from Frank J. Stadermann 19 Jan. - Quote: "Interplanetary dust particles (IDPs) are complex assemblages of primitive solar system materials that carry abundant extra-solar phases. Our recent work shows that circumstellar and interstellar phases are concentrated in a subgroup of IDPs with anomalous bulk N isotopic compositions that are isotopically primitive."
- "Isotopic and TEM investigations of variations in presolar graphite morphology" by Croat, T. K. with F.J. Stadermann & T.J. Bernatowicz, abstract & PDF from Frank J. Stadermann 19 Jan. - Quote: "As discovered during previous studies of Murchison [meteorite] 'onion' and 'cauliflower' presolar graphites, the degree of graphitization among presolar graphites is quite variable... From correlated ... investigations of the graphite morphologies and their internal constituents, we hope to learn more about the circumstellar environments in which they formed."
- "Characterization of presolar silicate and oxide grains in primitive carbonaceous chondrites" by Nguyen, A.N. with F.J. Stadermann, E. Zinner & 3 others, abstract & PDF from Frank J. Stadermann 14 Feb. - Quote: "Raster ion imaging of the oxygen isotopes with the NanoSIMS ion microprobe has been used to identify presolar grains in two primitive meteorites... carbonaceous chondrite Acfer 094 [and] CO3 chondrite ALHA 77307... The oxygen isotopic compositions of the presolar silicates indicate origins in red giant and asymptotic giant branch stars. Analysis of the Si isotopic compositions of 10 presolar silicates provides further constraints on the effects of Galactic chemical evolution."
NEOCP Activity on 3 June '07
The MPC's NEO Confirmation Page has 2 listings: 2 new
When last checked at 2357 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new listings. Both of these were "one nighters." This listing info is unchanged since when checked at 0106 UTC on today.
New MPECs on 3 June '07
Minor Planet Electronic Circulars
There was one MPEC issued this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- K04S09T 2004 ST9 (arc=2 opp, H=18.1 ~812m) from Pla D'Arguines Obs. (June 2.00-01p4)
Observers on 3 June '07
One observing facility participated in today's MPECs.
|941||Pla D'Arguines Obs. in Spain, 1 in MPEC 2007-L06 -- 2004 ST9|
Chronology on 3 June '07
Times are UTC for when the items were noted by Major News.
|1845||Added link to news story, "Flying telescope tests near"|
Added link to news story, "Retirement seems likely for rocket made in Decatur; ULA hopeful"
|1624||Added MOS paper, "Anatomy of an isotopically primitive interplanetary dust particle: Coordinated NanoSIMS and Auger Nanoprobe analyses" - see above|
Added MOS paper, "Characterization of presolar silicate and oxide grains in primitive carbonaceous chondrites" - see above
Added MOS paper, "Isotopic and TEM investigations of variations in presolar graphite morphology" - see above
|1408||Grabbed MPEC 2007-L06 - Daily Orbit Update - see above|