2009-07-30, RGB
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 |
| Location: | Katzelsdorf |
| 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.
Dec: +56° 42′ 30″
Size: 16′
Distance: 7600 light years
Trumpler classification: II 1 r.