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NGC 4088 (UMa)
Click on the image for a larger version
| Date/Site: |
25. March 2020. Remote observatory on the AAR club's site in Presberg |
Exposure/
Filters: |
R: 20 x 180 seconds,
G: 18 x 180 seconds,
B: 16 x 180 seconds,
L: 30 x 180 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: Microtouch and FocusMax,
data acquired remotely using CCD-Commander and MaximDL 6,
calibration and processing: PixInsight 1.8 |
Ever since I shot this galaxy in 2009 with the 13-inch this image waited for it's completion. As the 13-inch is no longer used for photography the 10-inch Newton had to fulfil this task.
Here the old image is shown:
NGC 4088 with SN (UMa), May 2009
Click on the image for a larger version
| Date/Site: |
May 30., 2009, AAR-observatory in Presberg |
Exposure/
Filter: |
Luminance 6 x 5 and 7 x 10 minutes (-20°C) |
| Camera: |
SBIG ST10XME |
Optics/
Instrument: |
13"-Newton on the Gemini 41 observatory mount, Baader coma-corrector |
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focusing with RoboFocus and MaximDL |
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Darks, alignment and stacking: MaximDL.
levels, curves and artificial flatfield: Photoshop CS |
Remarks: 5.5 mag-sky, no wind, +14°C, after the moon set until the break of dawn.
The supernova outshines the galaxy's core.
The week before I had the pleasure to observe NGC 4088 plus supernova with a wonderful 20" Dobson during the annual ITV.
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© Friedhelm Hübner, last revision: 03.12.2023