![]() ![]() The opposite side of Phoebe was covered by the other two observations. On two nights covering the same side of Phoebe, the photometry tested positively for an absorption feature centered at 0.7 mu m due to oxidized iron in phyllosilicates. Broadband photometry of Phoebe using ECAS filters was acquired on four nights in 1982 (Tholen and Zellner, Icarus, 1983). We confirm the strong, positive spectral slope attributed to organic material. These absorption features are attributed to (6) A1 -> (4) T2(G) and (6) A1 -> (4) T1(G) charge transfer transitions in minerals such as goethite and hematite that are products of the aqueous alteration of anhydrous silicates. A slight inflection covering 0.4 to 0.6 mu m and a change in slope near 0.73 mu m suggesting the lower wavelength edge of an absorption are also present. A distinct absorption feature centered at 0.67 mu m is apparent in the spectrum. J.Ī linear mixing model has been used to separate the high-resolution visible/near-infrared reflectance spectrum of the Iapetus dark material from spectra of the leading and trailing sides of Iapetus. The Composition of the Iapetus Dark Material, Hyperion and Phoebe These absorption features are attributed to the (6)A(sub 1) yields (4)T(sub 2)(G) and (6)A(sub 1) yields (4)T(sub 1)(G) ferric charge transfer transitions in iron alteration minerals such as goethite and hematite that are products of the aqueous alteration of anhydrous silicates. These absorptions are very similar to those identified in the spectrum of the dark material on the surface of Iapetus, suggesting that the dark material on these two satellites is compositionally similar and has a similar origin. A slight inflection near 0.4 - 0.6 micron and change in slope near 0.73 micron suggesting the lower wavelength edge of an absorption are also present. A distinct absorption feature centered at 0.67 micron is present. We use a linear mixing model to separate the reflectance spectrum of the dark material on Hyperion from the icy material. The spectrum of Hyperion shows the strong spectral slope apparent in spectra of many outer Solar System materials and attributed to organics. The spectrum of Phoebe is similar to the spectrum of a C-class asteroid, with an absorption feature centered near 0.43 micron superimposed on the UV/blue intervalence charge transfer transition present in the spectrum. Narrowband reflectance spectra of the Saturnian satellites S VII Hyperion and S IX Phoebe were obtained across the 0.4 - 0.8 micron spectral region. That being the case, we opted to join forces with Iapetus and bring the music directly to you! The ten minute epic of a track “Lachrymae Rerum” is now live and streaming over on our YouTube channel.Are Hyperion and Phoebe Linked to Iapetus? Speaking of the latest album, the effort is available for a damn near unbelievable FREE DOWNLOAD over on Bandcamp! Go take advantage of that while you still can! These guys deserve all the love they get and some! They also don’t shy away from elaboration with their latest album “The Long Road Home” clocking in at over an hour and fifteen minutes! Between it’s 9 tracks, it’s not uncommon to see numbers above ten minutes per. They write large scale, beautiful music that could be cast as a cross between Melodic Death Metal and Progressive Metal with no shortage of twists between. Iapetus are a wonderful, highly talented two man band hailing from none other than Long Island, New York. You have to respect artists that purely make music for the love of music. ![]()
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