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(IAAC) Obj: M1 - Inst: TV-102 (102mm f/8.6 APO refractor)
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Observation Poster: Ron B[ee] <ronby@home.com>
Observer: Ron B[ee]
Your skills: Advanced (many years)
Date/time of observation: 11/11/01 11 11:00pm PDT
Location of site: 117h 9m W (Lat 32h 43m N, Elev 2000 ft)
Site classification: Exurban
Sky darkness: 5.8-6.0 <Limiting magnitude>
Seeing: 7 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: TV-102 (102mm f/8.6 APO refractor)
Magnification: 22x, 30x, 60x, 110x, 176x, 220x
Filter(s): none
Object(s): M1
Category: Supernova remnant.
Class:
Constellation: Tau
Data: mag 8.4 size 6'
Position: RA : DEC :
Description:
Near zenith, near mag 6 sky, but not very transparent. Located easily at 22x
and looked like a smoke. 30x showed irregular patch of smoke, bright and
elongated NE-SE. Quite large at 60x with definitely elongation and a brighter
center. Reminded me on an amaeba. Best view and looked very much like this
sketch, http://www.regulusastro.com/regulus/sketches/m1.jpg, but dimmer. The
view at 110x is similar to 60x but dimmer. Too dim at 176x and 220x but can
still be seen! The view at this high magnification is large and looked like
the photo, only much, much dimmer than the photo,
http://www.oz.net/~tharris/Astronomy. (look for M1).
From last year log, M1 was difficult to find through the C102-HD and
was an unimpressive smoke; so perhaps the APO made a differrence.
The old master, John Mallas through his 4" Unitron wrote "On the best of
nights, an experienced observer may notice some streaks throughout the inner
portion of the nebula, but they are extremely difficult to see." Also, Walter
Scott Houston noted "My 4-inch Clark refractor has revealed hints of the
nebula's ragged edge that appears so prominently in photographs." The TV-102
revealed neither. So this is a cause for rematch and it wants to completely
"cook the crab" reall bad!
Ron B[ee]
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