Cultural Percussionist

The Cosmos with NGC 925

This attractive, nearly face-on barred spiral galaxy glows at magnitude 10.1 and measures 12.0′ by 7.4′. To find it, point your telescope 2° east of Gamma (γ) Trianguli. Through a small scope, NGC 925’s figure appears indistinct, but an 8-inch or larger instrument reveals the spiral arms that fold back abruptly from a long bar. At high magnification, say, above 250x, you’ll spot the stellar nucleus.

NGC 925 is a barred spiral galaxy located about 30 million light-years away in the constellation Triangulum. The morphological classification of this galaxy is SB(s)d, indicating that it has a bar structure and loosely wound spiral arms with no ring. The spiral arm to the south is stronger than the northern arm, with the latter appearing flocculent and less coherent. The bar is offset from the center of the galaxy and is the site of star formation all along its length. Both of these morphological traits—a dominant spiral arm and the offset bar—are typically characteristics of a Magellanic spiral galaxy. The galaxy is inclined at an angle of 55° to the line of sight along a position angle of 102°.

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