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Pismis 24 and NGC 6357

Pismis 24 and NGC 6357

About the Object

  • R.A. Position
    R.A. PositionRight ascension – analogous to longitude – is one component of an object's position.
    17h 25m 23.99s
  • Dec. Position
    Dec. PositionDeclination – analogous to latitude – is one component of an object's position.
    -34° 25' 59.99"
  • Constellation
    ConstellationOne of 88 recognized regions of the celestial sphere in which the object appears.
    Scorpius
  • 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.
    About 8,000 light-years (2,500 parsecs)
  • Dimensions
    DimensionsThe physical size of the object or the apparent angle it subtends on the sky.
    2.4 arcminutes (6 light-years or 1.75 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: 10602: J. Maiz-Apellaniz (Instituto de Astrofísica de Andalucía, Spain), N. Walborn and E. Nelan (STScI), N. Morrell Carnegie Institution of Washington), and V. Niemela (Universidad Nacional de La Plata) 9857: O. De Marco (American Museum of Natural History), C. R. O'Dell (Vanderbilt University), and R. Rubin (NASA Ames Research Center) 9091: J. Hester, P. Scowen, and K. Healy, (Arizona State University).
  • Instrument
    InstrumentThe science instrument used to produce the data.
    HST>ACS/WFC, HST>ACS/HRC, and HST>WFPC2
  • Exposure Dates
    Exposure DatesThe date(s) that the telescope made its observations and the total exposure time.
    April 2002 and April 2006
  • Filters
    FiltersThe camera filters that were used in the science observations.
    F550W (V), F547M (Strömgren y), F656N (Halpha), F658N (Halpha+[N II]), and F850LP (SDSS i)
  • Object Name
    Object NameA name or catalog number that astronomers use to identify an astronomical object.
    Pismis 24, NGC 6357, Cl Pismis 24
  • Object Description
    Object DescriptionThe type of astronomical object.
    Open Star Cluster and Emission Nebula
  • Release Date
    December 11, 2006
  • Science Release
    Heavyweight Stars Light Up Nebula NGC 6357
    Read the release

Downloads

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  • 795 × 1280
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Pismis 24 and NGC 6357
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 and WFPC2 instruments on the Hubble Space Telescope using several different filters. Five filters were used to sample both broad and narrow wavelength ranges. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are: Blue: F550W (V) + F547M (Strömgren y) Red: F656N (Halpha) + F658N (Halpha+[N II]) + F850LP (SDSS 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.

Related Images & Videos

Heavyweight Stars Light Up Nebula NGC 6357

Heavyweight Stars Light Up Nebula NGC 6357

The small open star cluster Pismis 24 lies in the core of the large emission nebula NGC 6357 in Scorpius, about 8,000 light-years away from Earth. Some of the stars in this cluster are extremely massive and emit intense ultraviolet radiation. The brightest object in the picture...

Pismis 24 Star Cluster

Pismis 24 Star Cluster

Pismis 24 - Double Star

Pismis 24 - Double Star

Zoom Into Pismis 24

Zoom Into Pismis 24

Zooming from an image of a portion of Scorpius centered on NGC 6357 and the Pismis 24 star cluster into images obtained with the Hubble Advanced Camera for Surveys, which resolve Pismis 24-1 into two stars.

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Details

Last Updated
Mar 14, 2025
Contact
Media

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

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