Spherical harmonic models of the shape of asteroid (16) Psyche

This archive contains spherical harmonic models of the shape of asteroid (16) Psyche.

Psyche-Shepard2017.sh

This is a degree and order 29 spherical harmonic model of the shape of Psyche that was constructed from the shape model of Shepard et al. (2017). The spherical harmonic coefficients were obtained from a least squares inversion that made use of the vertex coordinates from the file psyche.v.final.mod.mod. The least squares inversion was performed using the pyshtools routine SHCoeffs.from_least_squares() and tests show that the power spectrum is stable for maximum degrees up to, and including, 29. The coefficients are in meters and should be used with 4-pi normalized spherical harmonic functions.

Psyche-Shepard2021.sh

This is a degree and order 10 spherical harmonic model of the shape of Psyche that was constructed from the shape model of Shepard et al. (2021). The spherical harmonic coefficients were obtained from a least squares inversion that made use of the vertex coordinates from the file psyche.vertex.obj. The least squares inversion was performed using the pyshtools routine SHCoeffs.from_least_squares(), and tests show that the power spectrum decreases dramatically for maximum spherical harmonic degrees beyond 10. The coefficients are in meters and should be used with 4-pi normalized spherical harmonic functions.