The Small Magellanic Cloud, SMC

Irregular Galaxy SMC, the Small Magellanic Cloud (NGC 292) in Tucana

[smc-uks.gif]
Right Ascension 0 : 52.7 (h:m)
Declination -72 : 50 (deg:m)
Distance 210.0 (kly)
Visual Brightness 2.3 (mag)
Apparent Dimension 280 x 160 (arc min)

Like its larger apparent neighbor, the Large Magellanic Cloud, the Small Magellanic Cloud was certainly known to the ancient southerners, but became known to us only when Magellan went on his journey around the world, in 1519. The main body of the Small Magellanic Cloud has been assigned NGC 292 in Dreyer's catalog, which is now sometimes used for this galaxy. In addition, many clusters and nebulae which are members of this galaxy have been given their own NGC numbers.

This galaxy looks like a peace of the Milky Way for the naked eye. It orbits our Milky Way galaxy at about 210,000 light years distance, which makes it the third-nearest external galaxy known (after the LMC and the 1994 discovered Sagittarius Dwarf Elliptical Galaxy). Our current distance value takes into account the corrected Cepheid distance scale based on the Hipparcos satellite data published in early 1997.

The SMC is of irregular type. It may be a distorted barred disk, deformed by the tidal gravitational forces of Milky Way and LMC, but this is not sure. It contains several nebulae and star clusters which can be seen in photographs and through telescopes.

It was the Small Magellanic Cloud where Miss Henrietta Leavitt discovered the period-luminosity relation of Cepheid variables, which is since then the most reliable method available for determining large cosmic distances.

In John Caldwell's observing list. In the Astronomical League's Southern Sky Binocular Club list.

The image in this page was obtained by David Malin with the Anglo-Australian Telescope. This image is copyrighted and may be used for private purpose only. For any other kind of use, including internet mirroring and storing on CD-ROM, please contact Coral Cooksley of the Anglo Australian Observatory. The image also shows two remarkable foreground objects, globular clusters of our own Milky Way galaxy: Situated on the right is conspicuous 47 Tucanae (NGC 104), while in the left top is NGC 362. These are, of course, much closer to us than the galaxy.

  • More information on this image by David Malin

    Hartmut Frommert (spider@seds.org)
    Christine Kronberg (smil@lrz.uni-muenchen.de)

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    Last Modification: 29 Mar 1998, 12:25 MET