| Object : | IC 1831 Heart Nebula |
| Coordinates/Direction : | RA: 02h32m, DEC: +61o23' |
| Object size : | 180' |
| Object magnitude : | 4 |
| More to know : |
Simbad:
http://simbad.u-strasbg.fr/ simbad/ sim-id?Ident= IC+1831 |
| Date : | 2021-11-02 |
| Time (UT) : | 17:56 to 18:37 |
| Mount : | SkyWatcher HEQ5 controlled by Astroberry |
| Guide : | Ekos internal guider in dithering mode, QHY5 camera with 200 mm f/3.5 lens |
| Lens/telescope : | Pentax 645 300 mm ED f/4 (medium format lens) |
| Corrector/Barlow : | - |
| Field (FOV) : | 6.8x4.5 degree, before cropping |
| Filter : | none |
| camera : | Canon 6D, controlled by Astroberry software |
| Film/CCD : | Raw |
| Exp. time : | 13x120 seconds, iso1600 |
| Image process tool : | Siril, Fitswork, Irfanview |
| Processing : | crop, resize, level, cal dark, bias, flat |
| Weather : | clear |
| Site : | Sweden, Stockholm, Ingarö. Bortle class 4 |
| Comment : |
Now when at the dark place at Ingarö I must try to catch some nebulas.
This is the Heart Nebula.
It's not easy to recognize it in the strong full Moon light.
I give it a new try later when not full Moon and give it much longer exposure.
I had to throw away half of the photos because of clouds coming into the field.
The flat calibration master is far from perfect, as a result the center got a dark spot which shouldn't be there.
It's very difficult to take high quality flat frames, this is done against the evening sky before the stars appear. |
English
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