Re: (IAAC) Obj: M1-79 (PK93-2.1, png93.3-2.4) - Inst: 20" f/5 dob

Yann Pothier wrote:
>So this combination of low optical quality/some misalignment must
>have "troubled" my deep sky observation, specially for tiny features
>even in brighter objects. What about your 20-inch telescope?

It's possible, Yann. I collimate the 20" with a laser collimator before
each observing session now - it needs it, unfortunately. But my optics
are mighty dirty, which MAY have affected finer resolution? But the most
likely culprit was the bands of cirrus that plagued us all that night...

Still it is interesting that with better skies, observers always seem to
note the outer shell of this PN, but never my neat little "peanut" core.
This central bipolar core is nicely visible on the DSS image, though. I
guess in the end, the best thing is to get more observations in! ;>

>PS: I have become quite lazy with my logs but have been kept away by the
>edition of next Ciel Extreme's issue. BTW, anyone with Barnard 142-143

Whatever you have time to share is always appreciated, Yann! As for the
call for observations, I have B142/3 on my "A" list for next session...

Clear skies!
Lew Gramer

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