Mu Geminorum

μ Geminorum

Mu Geminorum is Castor's left foot.

You've presumably found mu and eta by starhopping from delta to tau and then to mu.

The first thing to do here is visit M35, a magnificent open cluster with gently curving rows of stars. It's two degrees northeast of 1 Geminorum.
    Considered one of the finest clusters in all the heavens, it can be explored with binoculars, but telescopes bring in many more fetching details. With an apparent magnitude of 5.3, M35 can be seen with the naked eye under ideal conditions; it's about the size of the full moon.
    On the northeastern edge of M5 is the wonderful binocular binary Otto Struve 134, an orange primary and pale purple companion: 7.6, 9.1; 189, 31".

On the eastern edge of your field of view is mu Geminorum, a multiple star system with very wide faint companions:
     A-BC: 3.1, 11.3; 141, 108.1".
     AD: 3.1, 11.9; 65, 58.7".
     AE: 3.1, 13.1; 85, 79.4"
     AF: 3.1, 12.2; 114, 137.9".

If you centre mu Geminorum then put it slightly to the north you'll see nu Gem and 15 Gem, both binaries:
     nu Gem (Struve Appendix 77): 4.1, 8.0; 330, 112.6".
     15 Gem (Sh 70): 6.7, 8.2; 203, 25.2", a golden primary and blue companion.

One binocular field southeast is gamma Gem. Click on gamma on the map.

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1999-2014 by Richard Dibon-Smith.