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Messier 98 - Spiral Galaxy in Coma Berenices

Messier 98. Image Credit: <a href='http://www.feraphotography.com/?referer=frostydrewobservatory' title='Bob and Janice Fera' target='new'>Bob and Janice Fera</a>. Used with permission.

Messier 98. Image Credit: Bob and Janice Fera. Used with permission.

This month, we journey to the edge-on spiral Messier 98, located near the westerly border of the Coma-Virgo Galaxy Cluster. M 98 and its neighbor galaxies M 99 and M 100 were discovered by Pierre Mechain on the night of March 15, 1781 and confirmed by Messier a month later. While the latter two are roundish face-on spirals, M 98 is more edge-on with apparent dimensions of 9 by 3 arc-minutes. At magnitude 10.1, it’s one of the fainter Messier objects, but is still visible with small-aperture scopes. The accompanying sketch shows its appearance through a 4.5-inch reflecting telescope on an evening when the limiting magnitude was 5.0. Patience and averted vision were requisite!

Finding galaxies in this part of the sky can be a daunting task, but M 98 is relatively easily picked up just one-half degree west of 6 Comae Berenices. This 5th magnitude star forms an isosceles triangle with Denebola (beta Leonis) and omicron Virginis (see finder chart).

M 98 is somewhat of an oddball as galaxies go. While a vast majority of galaxies are moving away from us as the universe expands, this one is actually heading our way at a 125 mile per second clip. Don’t expect M 98 to loom larger as the years go by. It’s a whopping 55 million light-years away!

Glenn Chaple
Author:
Glenn Chaple
Entry Date:
May 11, 2015
Published Under:
Glenn Chaple's Columns
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