NGC 2903 is a barred spiral galaxy in constellation Leo.
Click on the image to open it in a JavaScript viewer.
By toggling between the images (click on the button) it can be seen that the HII regions (reddish) correlate with bluish regions. That's because the HII gas clouds typically contain many young (blue) stars which are also responsible for the ionization. Furthermore the HII regions also emit [OIII] and H-beta light
which is collected by the blue filter.
The small low surface brightness galaxy on the left side is UGC 5086.
(In the Javascript viewer annotations can be enabled via the menu or by pressing the key '3'.)
FOV: | 0.44° × 0.44° (full view) | ||||||||
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Date: | 2019-2022 | ||||||||
Location: | Pulsnitz, Germany | ||||||||
Instrument: | 400mm Newton at f=1520mm | ||||||||
Camera Sensor: | Panasonic MN34230 | ||||||||
Orientation: | North is up (exactly) | ||||||||
Scale: | 0.8 arcsec/pixel | ||||||||
Total exposure times: |
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Image processing steps where:
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