(IAAC) Obj: M 27 - Inst: 24 cm dobsonian, f/6.6

[Tudorica Alexandru]

That sky I had only once in my entire astronomer life and i think that it was an atmospheric anomaly, becouse from that point the best sky I had it was only +7.0. I determined the limit magnitude then with the limit magnitude areas of IMO, in Boo an Cyg, where I almost didn't had almost any star to count. (only three left). I am at 260 m altitude, but the highest observing place i can get in Romania is at about 1800m. Two weeks ago at the perseids I had at best +6.94....
  And don't forget that the limit mgnitude is an subjective thing...
Clear skies, 
Alex

Natko Bajic <natkobajic at yahoo.com> wrote:
Wow, +7.45 sky! I had once about 6.75, maybe even 6.8,
from my observation place, 40km from cities! Amazing,
but more than a half magnitude deeper looks incredible
from "normal" altitudes. That should be over 2000m or?
We in Croatia do not have so high mountains...

I saw color in M 42 once, with 12cm refractor, but
with averted vision only, and just in traces...

Regards,N.

--- Tudorica Alexandru wrote:

> I did't used any sort of nebula filter, but i
> usually see different colours than others in nebulae
> and comets. I saw once on M 27 a green hue, but
> witht the 9 cm refractor, in +7.45 sky... I see
> colours in telescope very rare, only three times
> until now.
> Clear skies,
> Alex
> 
> 
> 
> 
> "Lewis J. Gramer" wrote:
> This was an interesting log, Alex. Were you using
> any sort
> of nebula filter (e.g., NarrowBand, UHC, OIII, or
> similar),
> when you noted the color of the Dumbbell as
> "yellow-red"?
> 
> Clear skies!
> Lew
> 
> 
> 
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