IC433 is a supernova remnant of a star which exploded about 35000 years ago. It is located approx. 5000 light years away. To the left is Sharpless 249, a large emission nebula, which also contains the small reflection nebula IC444( small blueish patch in the upper middle).
The two bright stars are Eta and Mu Geminorum.
Canon EOS 20D Modified Canon 20D mounted on a TMB 80mm/F6 + Televue 0.8x reducer/flattener. Halpha ( Astronomik Ha, 13nm): 18x600sec/ISO800; RGB ( IDAS-LPS): 12x300sec/ISO800. Calibration and stacking, averaging, color balancing, sharpening in Images Plus and Photoshop CS2.