G'day Cobbers,
I have observed this strange open cluster on a few occasions and I am interested what others make of it. It is not much to look at, 4 bright stars and a few much fainter, pretty boring? but the 4 principle stars have different colours this is how Hartung and I see them.
21 Jan 2006, 120mm Refractor pale lemon, Orange, Yellow and White.
12 Jan 1996, 200mm Dob: Red, blue/green, blue and greyish.
E J Hartung : Yellow, Orange, Bluish and ashy.
What colours do others see
I will check it out with my 250mm Dob when I get a chance.