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The Pluto System – May 18, 2005

The Pluto System - May 18, 2005

About the Object

  • Distance
    DistanceThe physical distance from Earth to the astronomical object. Distances within our solar system are usually measured in Astronomical Units (AU). Distances between stars are usually measured in light-years. Interstellar distances can also be measured in parsecs.
    Although its orbit is highly eccentric, Pluto's average distance from the Sun is 39.44 Astronomical Units (A.U.) or roughly 3.6 billion miles (5.9 billion kilometers).
  • Dimensions
    DimensionsThe physical size of the object or the apparent angle it subtends on the sky.
    Pluto has a diameter of roughly 1,475 miles (2,280 km) at the equator.

About the Data

  • Data Description
    Data DescriptionProposal: A description of the observations, their scientific justification, and the links to the data available in the science archive.
    Science Team: The astronomers who planned the observations and analyzed the data. "PI" refers to the Principal Investigator.
    These HST data are from proposal 10427: H.A. Weaver (JHU/APL), M.W. Buie (Lowell Obs.), S.A. Stern, J.R. Spencer, E. Young, and L.A. Young (SwRI); and proposal 9391: M.W. Buie and W.M. Grundy (Lowell Obs.), E. Young, L.A. Young, and S.A. Stern (SwRI). M. Mutchler (STScI) and A.J. Steffl (SwRI) are also on the science team.
  • Instrument
    InstrumentThe science instrument used to produce the data.
    HST>ACS/WFC
  • Exposure Dates
    Exposure DatesThe date(s) that the telescope made its observations and the total exposure time.
    May 18, 2005
  • Filters
    FiltersThe camera filters that were used in the science observations.
    F606W (V)
  • Object Name
    Object NameA name or catalog number that astronomers use to identify an astronomical object.
    Pluto
  • Object Description
    Object DescriptionThe type of astronomical object.
    Dwarf Planet
  • Release Date
    October 31, 2005
  • Science Release
    NASA’s Hubble Reveals Possible New Moons Around Pluto
  • Credit
    NASA, ESA, H. Weaver (JHU/APL), A. Stern (SwRI), and the HST Pluto Companion Search Team

Downloads

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  • 400 × 400
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Compass and Scale
Compass and ScaleAn astronomical image with a scale that shows how large an object is on the sky, a compass that shows how the object is oriented on the sky, and the filters with which the image was made.

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Details

Last Updated
Mar 28, 2025
Contact
Media

Claire Andreoli
NASA’s Goddard Space Flight Center
Greenbelt, Maryland
claire.andreoli@nasa.gov