2008 TC3 had an albedo of 5% before entry, or a little bit more reflective than fresh asphalt.
5% albedo is probably not that far off for many asteroids... BTW, the moon's albedo is about 7%, or about half way in reflectivity between fresh and worn asphalt... -- Richard Kowalski Full Moon Photography IMCA #1081 --- On Sun, 3/7/10, Meteorites USA <[email protected]> wrote: > From: Meteorites USA <[email protected]> > Subject: [meteorite-list] Fusion Crusted Asteroid? > To: "Meteorite-list" <[email protected]> > Date: Sunday, March 7, 2010, 9:08 PM > About a year ago I asked a question > about fusion crusted meteoroids and the possibility or > probability of them given earth grazing asteroids. > Fusion Crusted "Meteoroids" > http://www.mail-archive.com/[email protected]/msg72463.html > > Now there's an article in New Scientist about "Dark > Asteroids" that reflect only 5% of light it receives from > the Sun. Could these be fusion crusted asteroids? > > Did WISE find one? > Dark, dangerous asteroids found lurking near Earth > "...One of these objects is as dark as fresh asphalt, > reflecting less than 5 per cent of the light it > receives..." > FULL ARTICLE: > http://www.newscientist.com/article/dn18616-dark-dangerous-asteroids-found-lurking-near-earth.html > > Why?, because I like asking questions that make people > think open mindedly about possibilities... > > Oh yeah, some related articles for ya's... > > Suspected Asteroid Collision Leaves Odd X-Pattern of > Trailing Debris > http://www.nasa.gov/mission_pages/hubble/science/asteroid-20100202.html > > Suspected Hypervelocity Collision in the Asteroid Belt > http://geology.com/nasa/asteroid-collision/ > > Asteroid fragments on a fast collision course with Earth > http://www.spaceref.com/news/viewpr.html?pid=14574 > > Asteroids Sunburn with Age: > http://www.skyandtelescope.com/news/3309121.html?page=1&c=y > > Asteroids Get a Surface Makeover When They Pass Near Earth > http://www.scientificamerican.com/article.cfm?id=asteroid-quakes > > Asteroid Craters In Relation to Age: > http://www.newscientist.com/article/dn7699-145cosmic-botox-bashes-asteroid-wrinkles-away.html > > Asteroid Age Fast With a Solar Wind Tan > http://www.universetoday.com/2009/04/22/young-asteroids-age-fast-with-a-solar-wind-tan/ > > Cosmic Radiation & Asteroid 2008 TC3: > http://adsabs.harvard.edu/abs/2010LPI....41.2256W > High Porosity and Cosmic-Ray Exposure Age of Asteroid 2008 > TC3 Derived from Cosmogenic Nuclides > Cosmogenic radionuclides in the Almahata Sitta ureilite, > combined with measured size of 28 m3, indicate that asteroid > 2008 TC3 had a density of 1.5 g/cm3 and a porosity of 55%. > Cosmogenic noble gas concentrations indicate a cosmic-ray > exposure age of 15 Myr. > > Given all this, how old are asteroids, really? > > Regards, > Eric Wichman > Meteorites USA > > P.S. This is of course related (if however loosely) to my > "dumb" question about the Wethersfield meteorites and the > possibility of them being from the same parent body. > ______________________________________________ > Visit the Archives at > http://www.meteoritecentral.com/mailing-list-archives.html > Meteorite-list mailing list > [email protected] > http://six.pairlist.net/mailman/listinfo/meteorite-list > ______________________________________________ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
