UGC 12158

UGC 12158, a barred spiral galaxy.

UGC 12158 (PGC 69533) is a barred spiral galaxy in the constellation of Pegasus, located at about 386 million light-years away from Earth. The galaxy is about 216,000 light-years across.[1] Its SIMBAD ID is Z 452-45, an alternative designation for this galaxy.[2]

The galaxy has been photographed by the Hubble Space Telescope, and one famous image shows the trail of a passing asteroid in front of the galaxy.[3] From Earth, it is seen face-on, which makes its central bar and spiral arms easy to study. Because of its shape, it almost look the same as the Milky Way.[4]

In 2004, a supernova explosion was discovered in one of its spiral arms, named SN 2004ef.[5][6]

An image taken by the Hubble Space Telescope shows a path of an asteroid passing through the galaxy.

References

  1. ↑ "Results for object UGC 12158". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 2026-06-27.
  2. ↑ "UGC 12158". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2026-06-27.
  3. ↑ "Asteroid photobombs Hubble snapshot of Galaxy UGC 12158". www.esahubble.org.
  4. ↑ "The Milky Way's (almost) identical twin". Discover Magazine. Retrieved 2026-06-27.
  5. ↑ T., Boles; M., Armstrong (2004). "Supernova 2004ef in UGC 12158". IAU Circular. 8399: 2. Bibcode:2004IAUC.8399....2B.
  6. ↑ Bishop, David. "Supernova 2004ef in UGC 12158". Retrieved 2026-06-27.


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