Pismis 24-1

Cluster


caption = A Hubble Space Telescope (HST) image of Pismis 24-1. Credit: HST/NASA/ESA.
name = Pismis 24-1
type = Open Cluster
epoch = J2000
ra = RA|17|24.3cite web
title=SIMBAD Astronomical Database
work=Results for NGC 6357
url=http://simbad.u-strasbg.fr/Simbad
accessdate=2007-04-12]
dec = DEC|-34|20
dist_ly =
dist_pc =
appmag_v =
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constellation = Scorpius
notes =
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Pismis 24-1 (also known as HDe 319718) is part of an open cluster in the nebula NGC 6357. Pismis 24-1 is the largest and more brilliant of the visible stars of this cluster, Pismis 24, and is one of the most massive stars known. The star is at least a double star, as revealed by the recent observation of camera ACS of the Hubble space telescope.Pismis 24-1 is composed of at least three objects, the resolved Pismis 24-1SW and the unresolved spectroscopic binary Pismis 24-1NE. The evolutionary zero-age masses of those two objects and that of the nearby Pismis 24-17 are all approximately 100 solar masses, very large but under the stellar upper mass limit.

ee also

* PISMIS
* List of most massive stars

External links

* [http://antwrp.gsfc.nasa.gov/apod/ap061219.html Massive Stars in Open Cluster Pismis 24 ] , 2006 December 19

References