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M101 (UMa)
Click on the image for a larger version
| Date/Site: |
6., 9. and 12. May 2022. Remote observatory on the AAR club's site in Presberg |
Exposure/
Filter: |
R: 14 x 300 seconds,
G: 21 x 300 seconds,
B: 24 x 300 seconds,
L: 93 x 300 seconds, (-20°C) |
| Camera: |
Moravian G3-16200 with Astronomik Type II-filters |
Optics/
Instrument: |
250mm f/4,7 Newton with VIP-3010 Paracorr on 10Micron GM1000 HPS |
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Guiding: ASI120 attached to a 61mm-finder,
focusing: Microtouch and FocusMax,
data acquired remotely using CCD-Commander, PHD_Broker with PHD2/multistar-guiding and MaximDL 6,
processing: MaximDL 6 and PixInsight 1.8 |
After an early heatwave, accompanied by a lot of Sahara-dust in the air, which did not allow any decent imaging, I tried again to image the large spiral galaxy M 101 and to produce a good astrophoto.
Hare the earlier attempts:
M101 (UMa)
Click on the image for a larger version
| Date/Site: |
3. and 5. May 2018. Remote observatory on the AAR club's site in Presberg |
Exposure/
Filter: |
RG: all 12 x 300 seconds,
B: 11 x 300 seconds,
L: 36 x 300 seconds (-20°C) |
| Camera: |
QSI 632 with Astronomik Type II-Filters |
Optics/
Instrument: |
250mm f/4 Newton with Baader RCC1 on 10Micron GM1000 HPS |
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Guiding: Lodestar attached to a 61mm-finder,
focusing with Microtouch and FocusMax,
data acquired remotely using CCD-Commander and MaximDL 6,
calibration: MaximDL 6, processing: PixInsight 1.8 |
This image was produced in the comissioning phase of my remote observatory, when not everything worked flawlessly. In the middle of the night the connection failed and could not be resumed - but the mount had to be parked and the roof had to be closed. So I drove to the observatory and solved the problem. All of a sudden it is an advantage that the station is not the distance of a plane trip away.
And the same object captured some years earlier with different optics:
M101 (UMa)
Click on the image for a larger version
| Date/Site: |
April 6th and May 4th, 2013, AAR-observatory in Presberg |
Exposure/
Filter |
L: 12 x 600 seconds,
RGB: all 5 x 600 seconds (-20°C) |
| Camera: |
SBIG ST10XME, CFW9 with SBIG LRGB-Filters,
Guiding off-axis with Lodestar |
Optics/
Instrument: |
10“ f8-Ritchey-Chrétien on AP1200 |
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Focusing with MicroTouch and FocusMax,
Automatic image acquisition with CCD-Commander,
Calibration: MaximDL 5,
processing in PixInsight 1.7 and Photoshop |
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