Rosette/2237 question

Hi all,

Pointed my scope for the first time at rosette/2237 last night. I quickly picked up the rectangular cluster of stars in the center but detected no nebulosity. This was with a 10" dob, relatively dark skies and dark adapted for about 30 minutes.

Is seeing any nebulosity beyond the reach of my 10"? Would a narrowband/ultrablock filter improve my chances?

Thanks!

It is possible to see the nebulosity of the Rosette in binoculars under excellent conditions. In a telescope with a narrow field of view and a magnificaiton of 50 or more, it is difficult to see the nebula without a filter. One trick is to rock the telescope slightly. In this way parts of the nebula may appear. With an 8-inch f/6 I could see the part north-east of the cluster in this way. The O-III filter works very well with the Rosette nebula. With an aperture of 12.5-inches several of the bok globules become visible, and in an 18-inch it is a marvellous sight. Even an 8-inch shows a considerable amount of detail.

Inge S

The Rosette is BIG. It's easier to see in my widefield 4.5inch scope than my 6inch f/8 dob. Filter definitely helps.

I've seeen it maybe twice in my life, once with 100mm binoculars under mmag 5.7 skies. But, you probably won't see in if you have mag 5.5 skies. I've never seen it in mag 5.5 skies with any instrument.

edz

I believe I saw it with naked eye plus UHC filter from a dark place last winter. Without filter only the cluster was seen, but with the filter I got a blinking effect.

Dmitri