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Surface composition of Kuiper belt object 1993SC
R H Brown1, D P Cruikshank, Y Pendleton
1Lunar and Planetary Laboratory, University of Arizona, Tucson 85721, USA.
Science (New York, N.Y.)
|May 9, 1997
Summary
Spectroscopic analysis of Kuiper belt object 1993SC reveals a red continuum and absorption features indicating the presence of simple and complex hydrocarbon ices, similar to those found on Pluto and Triton.
Area of Science:
- Planetary Science
- Astronomy
- Spectroscopy
Background:
- Kuiper Belt Objects (KBOs) are remnants from the early solar system.
- Understanding KBO surface composition provides insights into solar system formation.
- 1993SC is a notable KBO with an unusual spectral signature.
Purpose of the Study:
- To analyze the surface composition of Kuiper Belt Object 1993SC.
- To identify specific ices and hydrocarbons present on 1993SC.
- To compare 1993SC's composition with other outer solar system bodies.
Main Methods:
- Near-infrared (1.42–2.40 micrometer) spectroscopy was employed.
- Observations were conducted using the Keck Observatory.
- Spectral data was analyzed for absorption features and continuum reflectance.
Main Results:
- 1993SC exhibits a strongly red continuum reflectance.
- Prominent absorption features were detected at specific infrared wavelengths (1.62, 1.79, 1.95, 2.20, 2.32 µm).
- These features suggest the presence of simple hydrocarbon ices (e.g., methane, ethane) and complex hydrocarbons.
Conclusions:
- The surface of 1993SC is likely covered by simple hydrocarbon ices, akin to Pluto and Triton.
- The red spectral slope indicates the presence of more complex hydrocarbon compounds.
- This composition provides clues about the conditions and materials in the outer solar system during its formation.