(IAAC) Fwd: Observation of SN1998S by Dave Mitsky <firstname.lastname@example.org>
>Observer: Dave Mitsky
>Your skills: Intermediate (some years)
>Date/time of observation: 4/3/98 01:25 UT
>Location of site: ASH Naylor Observatory (Lat 40d08', Elev 570')
>Site classification: Rural
>Sky darkness: 5.0 <Limiting magnitude>
>Seeing: 7 <1-10 Seeing Scale (10 best)>
>Moon presence: Minor - crescent or far from object
>Instrument: 17" f/15 classical Cassegrain
>Object(s): Supernova 1998S
>Category: Extragalactic star.
>Constellation: Ursa Major
>Data: mag <12.6 size
>Position: RA 11h :46m DEC +47d:30'
>While observing the recent type IIn supernova 1998S in NGC 3877, a
spiral galaxy 0.3 south of Chi UMa, for the seventh time since 3/17/98,
I compared it once again to a nearby 12.6 magnitude field star and found
that the supernova, which had formerly been brighter than the field
star, had decreased in magnitude. Subsequently, I learned that 1998S,
the brightest supernova since 1987A, was indeed in decline. By early
June it may be as dim as 15th magnitude.
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