| Object : | NGC 7023, Iris Nebula |
| Coordinates/Direction : | RA: 21h01m, DEC: +68o10' |
| Object size : | 18'x18' |
| Object magnitude : | 6.8 |
| More to know : |
Wikipedia:
https://en.wikipedia.org/ wiki/ Iris Nebula |
| Date : | 2023-04-01 and 2023-04-10 |
| Time (UT) : | - |
| Exp. time : | 30x30 seconds and 120x60 seconds, iso1600, dithering mode |
| Image process tool : | Siril, Gimp, Irfanview |
| Processing : | Calibrated dark, flat and color |
| Weather : | clear |
| Comment : |
When the season come close to the end it's in hurry to find more objects to take photographs of.
This is the NGC 7023 nebula, even called Iris Nebula.
It's a bright reflection nebula.
The angle size of it is almost as the Moon, but still with a 300 mm lens it will be small.
See the bright dot in center.
Even when I collect exposures from two different nights as I have done here the nebula is weak.
A total exposure of 135 minutes.
The biggest problem when photographing nebulas is that you must have a dark sky or narrow band filters.
That wasn't the case this time.
Note how the surrounding of the nebula doesn't have many stars.
The nebula is much bigger than the bright part, the empty area are where the nebula block the stars behind. |
| Exp. time : | 60x60 seconds = 60 minutes, iso1600, dithering mode |
| Image process tool : | Siril, Gimp, Irfanview |
| Processing : | Calibrated bias, flat and astrometric color |
| Weather : | clear, temperature +3o C |
| Comment : |
The Iris Nebula is not far from us, only 1300 light years. |
English
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