News Release Archive:

News Release 145 of 1051

October 17, 2013 02:00 PM (EDT)

News Release Number: STScI-2013-42

Comet ISON Appears Intact

Technical facts about this news release:

About the Object
Object Name: Comet C/2012 S1 (ISON)
Object Description: Comet
Distance: At the time of the Hubble observations on October 9, 2013, the comet was 1.49 astronomical units (139 million miles) from the Sun. The comet was 1.91 astronomical units (177 million miles) from Earth.
About the Data
Data Description:

The image was created from Hubble data from proposal 13229 by the Hubble Heritage Team, PI: Z. Levay, M. Mutchler, C. Christian, L. Frattare, W. Januszewski, M. Livio, J. Mack, and J. Sokol (STScI/AURA), and K. Noll (NASA/GSFC).

High-level science products for these data are available from the MAST archive at

Instrument: WFC3/UVIS
Exposure Date(s): October 9, 2013
Exposure Time: 29 minutes
Filters: F438W (B) and F775W (i')
About the Release
Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)
Release Date: October 17, 2013
Color: This image is a composite of separate exposures acquired by the WFC3/UVIS instrument. Several filters were used to sample various wavelengths. The color results from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors are:
F438W (B) blue/green
F775W (i') orange