Comet 252P/LINEAR (April 4, 2016 - 20:56 UT)
At the time of the Hubble observations on April 4, 2016, Comet 252P/LINEAR was 0.093 astronomical unit (8.6 million miles or 14 million kilometers) from Earth. The sun-comet distance on that date was 1.037 astronomical units (96 million miles or 155 million kilometers). At closest approach on March 21, 2016, the comet was 0.036 astronomical unit (3.3 million miles or 5.4 million kilometers) from Earth.
The images were created from Hubble data from proposal 14103: J.-Y. Li and N. Samarasinha (Planetary Science Institute), M. Kelley (University of Maryland), M. Mutchler (STScI), and D. Farnocchia (Jet Propulsion Laboratory).
F625W (SDSS r)
This image was originally black and white and recorded only overall brightness. These brightness values were translated into a range of bluish hues. Such color "maps" can be useful in helping to distinguish subtly varying brightness in an image.