Sedna

Four 24-homoscalaranes (213-216) that exhibited 30-95% inhibition of the growth of KB cells at 10 pg/ml were isolated from the Indonesian Phyllospongia sp. [190], From the Pacific nudibranch Glossodoris sedna were isolated several scalarane and homoscalarane compounds, but only... 

Many bodies are candidates for dwarf planet status. They include the trans-Neptunian objects Orcus, Ixion, Huya, Varuna, Quaoar, and Sedna. 

Fontana, A., MoHo, E., Ortea, (., Gavagnin, M., and Cimino, G. (2000b) Scalarane and homoscalarane compoimds from the nudibranch Glossodoris sedna and Glossodoris dalU chemical and biological properties./. Nat. Prod., 63, 527-530. 

Glossodoris atromar nata j Spongia sp. Chromodoris sedna... 

Chromodoris sedna Scalarin Cacospongia scalaris Hochlowski eto/., 1983b... 

The dwarf planet 90377 Sedna was detected in 2004 and its diameter is estimated about 1800 km. Its orbit is highly eccentric semi-major axis 484 AU, the perihelion distance is 76 AU, the aphelion distance 892 AU. It has a red color, similar to that of Mars. This can be explained either by a concentration of iron oxides or organic compounds on its surface. 

Sedna is, so far, the largest and most distant trans-neptunian object. It was observed with the two 8.2 m VLT telescopes of ESO (Cerro Paranal, Chile). From its spectrum it was deduced that more than 50% of the surface could be covered with ice and the presence of N2 and CH4 was confirmed. One revolution of Sedna takes more than 10 500 years but during about 200 years, when this object is close to the Sun, a thin atmosphere of N2 may form (Barucci et al. 2005, [20]). 

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