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(IAAC) Obj: NGC 3414, NGC 3486, NGC 3504 - Inst: TV-102 (102mm f/8.6 APO refractor)



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Observation Poster: Ron B[ee] <ronby@cox.net>
Observer: Ron B[ee]
Your skills: Intermediate (some years)
Date/time of observation: 03/04/02 9:00pm-12:00am PST
Location of site: 117h 9m W (Lat 32h 43m N, Elev 2000 ft.)
Site classification: Exurban
Sky darkness: 5.0 <Limiting magnitude>
Seeing: 7 (light pollution from the west) <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: TV-102 (102mm f/8.6 APO refractor)
Magnification: 22x, 44x, 73x, 110x
Filter(s): 
Object(s): NGC 3414, NGC 3486, NGC 3504
Category: External galaxy.
Class: 
Constellation: Lmi
Data: mag 10.8, 10.3, 11.1  size 3' x 2.5', 7' x 5', 2.4'2
Position: RA :  DEC :
Description:
This was an “exercise” from Walter Scott Houston's book the Deep Sky Wonders. 
NGC 3414 - Couldn’t be seen at 22x.  Blinked in and out at 44x.  Much better at 
73x, stellar core very dim, barely perceptible nebulosity.  The galaxy lies at 
a midpoint between two white stars (with a tinge of yellow):  SAO 81542 and SAO 
81561.  Looks elongated.  Dimmer at 110x.
NGC 3504 – Couldn’t be seen at 22x.  A dim, gray patch at 44x, blinking in and 
out.  Better view at 73x but still extremely dim.  Core is blinking in and 
out.  Can’t detect a definite shape.  Formed a triangle with two yellowish 
stars:  SAO 81635 and SAO 81653.
NGC 3486 – Couldn’t be seen at 22x.  Can just barely detect at 44x, very dim, 
dimmest of the three galaxies.  Slightly better view at 73x, no shape detected, 
no core detected.  Forms a triangle with two white stars (with slight yellow 
tinge): SAO 81642 and SAO 81621.
Incredulously, Houston could use 400x with his 4-inch Clark refractor stopped 
down to 3-inch!
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