PGC 2492787 (Ursa Major) (rhedden)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa)

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PGC 2492787 (Ursa Major)

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PGC 2492787 (Ursa Major)

PGC 2492787 (also designated 2MASX J13562835+5509584) is a faint spiral galaxy in Ursa Major with highly extended arms. It turned up as an eye-catching background object in a far corner of my widefield refractor image of M101. TheSkyX databases list its visual magnitude as 17.55, and SIMBAD says it measures 0.48’ x 0.22’. It is listed as a LINER type, meaning its core contains a low-ionization nuclear emission-line region. Spectral lines are dominated by weakly ionized or neutral atoms. The Wikipedia page for LINER galaxies says, “LINERs are found less frequently in Sb-Scd galaxies (spiral galaxies with small bulges and loosely wound spiral arms).” This galaxy sure looks like one of those exceptions with loosely wound arms.

This galaxy is clearly not a logical target for a 4” refractor. However, the image has 25+ hours of integration behind it, enough to show that there is something interesting here. I thought I would post it because it may appeal to someone with a larger telescope and better seeing than I typically have here. Hope you enjoyed seeing this unusual object.

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