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Re: (IAAC) Obj: M57 - Inst: 6" newton,f/8 ,dobsonian mount



Michal Marcisovsky schrieb:
> ----
>
> Observer: Michal Marcisovsky
> Your skills: Intermediate (some years)
> Date/time of observation: 07/09/1999  10-11 pm  pst
> Location of site: Windy Hill,CA (Lat , Elev 400m?)
> Site classification: Suburban
> Sky darkness: 6.5 <Limiting magnitude>
> Seeing: 7 <1-10 Seeing Scale (10 best)>
> Moon presence: None - moon not in sky
> Instrument: 6" newton,f/8 ,dobsonian mount
> Magnification: 40,80,120
> Filter(s): none
> Object(s): M57
> Category: Planetary nebula.
> Class: 
> Constellation: Lyr
> Data: mag 8.8  size 1.4*1 arc min
> Position: RA 18:53  DEC 33:02
> Description:
> At 40x it is visible as a nice little disk sourounded by stars, when using 2x
>  and 3x barlow lens,
> can see ring, probably detected central star (?). It's a great object for a
>  small telescope, in 6 
> inch newtonian it's a pretty big ring.  

I tried to see the central star of M 57 using a friends 8" SC. I used 
magnifications up to 570x (sky limit was 6,1mag in Lyr). But there was no central 
star. I tried one hour with short breaks.   

BTW- I saw the central star easily in my 20incher that night.

Jens

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