α Persei

Alpha Persei, Mirfak (The Elbow) or Algenib (The Side), although this latter name is also the designation for gamma Pegasi.

This particular region of the sky is very rich and a marvelous sight in binoculars.

Mirfak is one of four stars which form a circular line around Cassiopeia. First find Cassiopeia then locate the three stars in Andromeda. Further along this outer group you'll find finding Mirfak. Of course you'll have to adjust the graphic depending on where Cassiopeia is found.

Mirfak is in the same field as a number of other bright stars: binoculars.

In the same field, near the southwest edge, is the bright open cluster NGC 1245.
      NGC 1245 is worthy of a Messier catalogue number, for its number and variety of colourful stars, mostly bright blue and orange, with an apparent magnitude of 8.4. While one can locate the object with binoculars, a medium sized telescope resolves the several hundred stars.


Encircling alpha Persei are a number of interesting stars. A little less than one full field north reveals the colourful Struve 392 (orange and blue): 7.5; 10.3; 348, 26.2".

One binocular field northwest from here brings in three bright stars, including eta Persei.
      Eta Persei goes under the binary label of Struve 307, a golden primary and blue companion: 3.8, 8.5; 295, 31.4".
      At the opposite end of the viewing field, between gamma and tau, and just south of the centre of your viewing field, is Struve 331, a white primary and blue companion: 5.2, 6.2; 85, 11.9".

Now south one field brings in iota and theta Persei.

Theta Persei is a lovely binary (Struve 296AB), a golden primary with a blue companion: 4.1, 10.0; 305, 20.7".

Less than a degree east of theta lies Struve 304, another fine colour-contrast, white and blue: 7.5, 10.8; 288, 26.3".


Back to alpha Persei, now southwest three fields of view for Algol.

Click on beta on the map for its details.

All files associated with The Constellations Web Page are
1999-2014 by Richard Dibon-Smith.