(IAAC) Obj: Sharpless 240, SH 240, S 240 - Inst: 15" f4.5 Obsession

[anonymous at s15272250.onlinehome-server.com]

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Observation Poster: Armin Hermann <burmeseinn at yahoo.com>

Observer: Armin Hermann
Your skills: Advanced (many years)
Date/time of observation: 13 Dec 2003
Location of site: Sangkhlaburi / Thailand (Lat +15, Elev 200)
Site classification: Exurban
Sky darkness: 6+ <Limiting magnitude>
Seeing: 8 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 15" f4.5 Obsession
Magnification: 78x
Filter(s): O III
Object(s): Sharpless 240, SH 240, S 240
Category: Supernova remnant.
Class: 
Constellation: Tau/Aur
Data: mag   size 3 deg
Position: RA 05:40  DEC +28:
Description:
Extremely faint supernova remnants in Tau/Aur. Using the Nagler 22mm at 78x 
with an OIII filter and averted vision I could make out the southern parts of the 
Nebula as very faint but fairly easily visible streaks. Without the OIII filter I could 
not detect any trace of SH 240. The nebula is almost too extended for my lowest 
magnification of 78x. SH 240 definitely needs very clear skies. I did not search for 
the northern arcs of the SN remnant.

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