NGC 7789

2009-07-30, RGB


50 %

100 % crop

Image data

Photographer:Jürgen Stöger
Optics:Takahashi FSQ106ED f/5 (main)
Scopos ED66 (guide)
Mount:Fornax 51
Cameras:QHY8 Pro (main)
Starlight SXV-M7 (guide)
Exposure:35 minutes
Conditions:Hazy night
Moon:69 % illuminated fraction
Date:30 July 2009
Remarks:elongated stars in lower left-hand corner due to tilt of camera in focuser

NGC 7789 object information

NGC 7789 is an open star cluster in Cassiopeia,
about 3° west of Caph, beta Cas. It is a large and very rich (in stars)
cluster with 16’x16′ diameter.

Visual observing: the cluster is an interesting object in medium-sized
telescopes, it has a compact character containing about 100 stars with
homogenous brightness.

RA: 23h57m24s
Dec: +56° 42′ 30″
Size: 16′
Distance: 7600 light years
Trumpler classification: II 1 r.