NGC 3521
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| Telescope: C-11 SCT F/6.3 | Guiding: 400 mm Telephoto lens - PHD Guiding |
| Camera: SXV H-9 | Exposure time: L 217'-R40'-G40'-B46' |
| Mount: EQ6 pro | Date: 23 / 04 / 2012 |
| Filter Wheel: S-X filter wheel | Location: Athens ''ZHN'' observatory |
| Filters: Astronomik L Ha RGB filters | Object location: RA: 11h 05.4m Dec: -00* 02' |