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Hubble Space Telescope (ACS) Image of 47 Tucanae

Hubble Space Telescope (ACS) Image of 47 Tucanae

About the Object

  • R.A. Position
    R.A. PositionRight ascension – analogous to longitude – is one component of an object's position.
    00h 24m 5.67s
  • Dec. Position
    Dec. PositionDeclination – analogous to latitude – is one component of an object's position.
    -72° 4' 52.59"
  • Constellation
    ConstellationOne of 88 recognized regions of the celestial sphere in which the object appears.
    Tucana
  • 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.
    This obejct is roughly 15,000 light-years (4,600 parsecs) away.
  • Dimensions
    DimensionsThe physical size of the object or the apparent angle it subtends on the sky.
    1 arcminute (4.6 light-years or 1.4 parsecs) wide

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.
    This image was created from HST data from the following proposals: 5912, 6467, and 7503: G. Meylan (Ecole Polytechnique Federale de Lausanne), D. Minniti (Universidad Catolica de Chile), S. Phinney (California Institute of Technology), C. Pryor (Rutgers University), B. Sams (Mediateam, Germany), and C. Tinney (Anglo-Australian Observatory) 8267: R. Gilliland (STScI), D. Naef (Observatoire de Geneve), A. Sarajedini (University of Florida), S. Sigurdsson (Pennsylvania State University), D. VandenBerg (University of Victoria), T. Brown (University Corporation For Atmospheric Research), A. Burrows (University of Arizona), W. Cochran (University of Texas, Austin), P. Edmonds (Harvard University), S. Frandsen (Aarhus University), S. Vogt, P. GuhaThakurta, and D. Lin (University of California, Santa Cruz), G. Marcy (University of California, Berkeley), M. Mayor (Observatoire de Geneve), and E. Milone (University of Calgary) 9019: R. Bohlin (STScI), G. De Marchi (ESA/STScI), and R. Gilliland (STScI) 9266: R. Gilliland, K. Sahu, and P. Goudfrooij (STScI) 9028: G. Meurer and H. Tran (Johns Hopkins University) 9443: I. King (University of Washington) and J. Anderson (Rice University) The international team was made of the following scientists: D.E. McLaughlin (University of Leicester), J. Anderson (Rice University), G. Meylan (Ecole Polytechnique Federale de Lausanne), K. Gebhardt (University of Texas, Austin), C. Pryor (Rutgers University), D. Minniti (Pontifica Universidad Catolica), and S. Phinney (Caltech).
  • Instrument
    InstrumentThe science instrument used to produce the data.
    HST>WFPC2, HST>ACS/WFC, and HST>ACS/HRC
  • Exposure Dates
    Exposure DatesThe date(s) that the telescope made its observations and the total exposure time.
    October 1995, November 1997, July 1999, October 1999, July 2001, April 2002, and July 2002
  • Filters
    FiltersThe camera filters that were used in the science observations.
    F300W (Wide U), F336W (U), F475W (SDSS g) For image: F475W (SDSS g), F555W (V), and F814W (I)
  • Object Name
    Object NameA name or catalog number that astronomers use to identify an astronomical object.
    47 Tucanae, NGC 104
  • Object Description
    Object DescriptionThe type of astronomical object.
    Globular Cluster
  • Release Date
    October 24, 2006
  • Science Release
    Hubble Yields Direct Proof of Stellar Sorting in a Globular Cluster
    Read the release
  • Credit
    NASA, ESA, and G. Meylan (Ecole Polytechnique Federale de Lausanne)

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Hubble Space Telescope (ACS) Image of 47 Tucanae
Color Info
Color InfoA brief description of the methods used to convert telescope data into the color image being presented.

This image is a composite of many separate exposures made by the ACS instrument on the Hubble Space Telescope using three different filters to sample broad wavelength ranges. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are: Blue: F475W (SDSS g) Green: F555W (V) Red: F814W (I)

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

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