(IAAC) Obj: NGC 1807 and NGC 1817 - Inst: 8" f/6 Dobsonian
Observer: Michael Geldorp
Your skills: Intermediate (some years)
Date/time of observation: 2/25/2000 19.50 UT
Location of site: Alphen ad Rijn, Netherlands (Lat 52*N, Elev )
Site classification: Suburban
Sky darkness: 4.5-5.0 <Limiting magnitude>
Seeing: II <I-V Seeing Scale (I best)>
Moon presence: None - moon not in sky
Instrument: 8" f/6 Dobsonian
Magnification: 49X, 98X, 203X, 244X
Object(s): NGC 1807 and NGC 1817
Category: Open cluster.
Data: mag 7.0, 7.7 size 17'.0, 16'.0
Position: RA 05:10 DEC +16:32
NGC 1807 is a loose group of about a dozen or so fairly bright stars at 49X
easily located in Taurus. NGC 1817 is not well seen, only a couple of stars
lie about 30' from NGC 1807.
At 98X and 203X, more and fainter stars can be seen in both clusters.
Espescially NGC 1817 shows a field sprinkled with faint stars at these higher
In the center of NGC 1807 is a small triangle of stars, one of wich is a double
star (9".9) split nicely at 98X.
There is a sketch on this object on my homepage: URL mentioned below.
Optional related URLs: http://home.wxs.nl/~geldo006/home.html
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