NGC 3521
From time to time I obtain data sets from remote observatories. One of my favorite providers is the Insight Observatory with telescopes in e.g. Chile, Namibia, New Mexico etc. One of the data sets I received, was data from the galaxy NGC 3521, located in the constellation Leo.
The images were taken with the following equipment:
| Location | Pie Town, New Mexico |
| Telescope | Dreamscope 16″ f/3.7 Astrograph |
| Focal length [mm] | 1525 |
| Focal ratio | 3.75 |
| Mount | Paramount ME |
| Camera | FLI Proline 16803 |
| Filter | L:R:G:B |
| Exposure time [min] | 160:75:75:75 |
| Resolution | 1.23″/px |
Data calibration and registration and the final processing was done with PixInsight. The result was as follows:
The faintest star in this image has an apparent magnitude of 22.4 magG (SDSS DR15).
Beside NGC 3521 there are a lot of background galaxies in the image. Furthermore I marked the two most distant quasars:
The two highest redshift quasars [Flesh 2015] in the image are:
SDSS J110605.31+001032.6 z=2.79 magG=21.1 (SDSS DR9)
2QZ J110715.4-001532 z=2.79 magG=20.2 (SDSS DR9)
The galaxy is close to the ecliptic, so some asteroids are visible in the image. The most prominent one is 2629 Rudra.
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