Sunday, December 21, 2025

Some more pre-solstice star clusters

 The sky brightness last night was a disappointing sqml=19.6 mpsas, which is normal for urban Santa Fe.  Wide-field starscapes are a futile effort under such skies, so long-focal-length photographhy is the solution.  I used the Canon FD 300mm f/4 L lens to photograph some more star clusters that were high in the sky (with an Olympus E-M5iii camera).

NGC 7789, "Caroline's Rose" in Cassiopeia

 The open cluster NGC 7789 in the constellation Cassiopeia was discovered by Caroline Herschel in 1783.

 

NGC 457

The open cluster NGC 457 in Cassiopeia is also known as the "Owl Cluster".  It was discovered by William Herschel (Caroline's older brother) in 1787.

Mirfak

 The star at the center of this image is Alpha Persei, Mirfak, the brightest star in the constellation Perseus.  It is the brightest member of the Alpha Persei Cluster, or Melotte 20, which extends beyond the field-of-view of this image.

The Double Cluster

 The "Double Cluster" in Perseus consists of NGC884 (left) and NGC 869 (right).  These star clusters are a very impressive sight in small telescopes.

M36 in Auriga.

 
M34 in Perseus

 

No comments:

Post a Comment

Comments are moderated.