*Description*:> 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. Technical facts about this news release: About the Object Object Name: Pismis 24, NGC 6357, Cl Pismis 24 Object Description: Open Star Cluster and Emission Nebula Position (J2000): R.A. 17h 25m 24s.00 Dec. -34° 26' 0."0 Constellation: Scorpius Distance: About 8,000 light-years (2,500 parsecs) Dimensions: The width of the largest component of the release image (see "Orientation/Scale" image below) is 2.4 arcminutes (6 light-years or 1.75 parsecs). About the Data Data Description: This image was created from HST data from the following proposal 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); and proposal 9091: J. Hester, P. Scowen, and K. Healy, (Arizona State University). Instrument: ACS/WFC, ACS/HRC, WFPC2 Exposure Date(s): April 2002 and April 2006 Filters: F550W (V), F547M (Strömgren y), F656N (Halpha), F658N (Halpha+[N II]), F850LP (SDSS i) About the Image Image Credit: NASA, ESA, and J. Maíz Apellániz Instituto de Astrofísica de Andalucía, Spain Release Date: December 11, 2006 Color: 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) Orientation/Scale: Pismis 24 and NGC 6357 [ http://imgsrc.hubblesite.org/hu/db/2006/54/images/b/formats/compass_large_web.jpg ]
