| NGC 2660 is an   open star cluster in the ship's constellation Sail and has an angular   extent of 3.0 'and an apparent magnitude of +8.8 mag. It was discovered by John Herschel on December 29, 1834, and is also referred to as OCL 759 or ESO 260-SC4. Long exposures in the light of Ha reveals lots of filaments probably related with the Vela SNR Full res version here |