Compass and Scale Image for Vesta
Vesta, 4 Vesta
The semi-major axis of Vesta's orbit about the Sun is 2.36 astronomical units (AU) or roughly 219 million miles (353 million kilometers).
Vesta has a mean diameter of approximately 330 miles (530 kilometers). The object has a 354-mile (570-km) diameter at the equator and a slightly smaller diameter of 288-miles (464-km) pole-to-pole.
This image was created from HST data from proposal 12050: J.-Y. Li (University of Maryland, College Park), L. McFadden (NASA/GSFC), P. Thomas (Cornell University), C. Russell (University of California, Los Angeles), M. Mutchler (STScI), and M. Rayman, C. Raymond, and S. Weinstein-Weiss (JPL/Caltech).
F373N (373 nm) and F469N (469 nm)
These images are composites of separate exposures made by the WFC3 instrument on the Hubble Space Telescope (HST). Each filter was used to sample a narrow wavelength range. The composite colors result from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors are:
Yellow/gold: F469N (469 nm)
Cyan: F373N (373 nm)