NGC 4088 from my own „Sterntaucher“ observatory
My next project in 2022 was galaxy NGC 4088 in the constellation Ursa Major.
Here is an overview of the used equipment and the exposure times:
| Equipment | Telescope 1 | Telescope 2 |
| Location and date | Krefeld, in March 2022 | Krefeld, in March 2022 |
| Telescope/Lense | 10″ Newton ohne Namen | TSQ-65ED Apo |
| Focal length [mm] | 1000 | 420 |
| Focal ratio | 3.9 | 6.5 |
| Mount | Skywatcher EQ8 | Skywatcher EQ8 |
| Camera | QSI 583WS | Moravian G3 16200 FW |
| Autoguiding | DMK21 AU04 on TSQ-65ED | DMK21 AU04 on TSQ-65ED |
| Filter | L | R:G:B |
| Exposure time [min] | 820 | 255:190:220 |
| Resolution | 1.11″/px | 2.95″/px |
Data calibration and registration and the final processing was done with PixInsight.
In the field were quiet a lot of quasars (see annotation). The three most distant of them are:
SDSS J120551.50+500609.9 with a redshift of 3.451 an apparent magB of 21.39 (2017,PASA,34,25).
SDSS J120525.27+502355.8 with a redshift of 3.428 an apparent magB of 21.31 (2017,PASA,34,25).
SDSS J120635.12+501353.0 with a redshift of 3.306 an apparent magB of 20.76 (2017,PASA,34,25).
The faintest object in this image has an apparent magnitude of approx. 21.4 magB (2017,PASA,34,25).
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