NGC 4395 is a low surface brightness galaxy in constellation Canes Venatici. NGC 4399, NGC 4400 and NGC 4401 are bright HII regions inside the galaxy.
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 three brightest HII regions have their own NGC numbers: 4399, 4400 and 4401 (in the image from to right to left and below the galaxy core). NGC 4400 and 4401 seem to be connected. In the Javascript viewer annotations of these objects can be enabled by pressing the key '3' or via menu.
FOV: | 0.44° × 0.42° | ||||||||
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Date: | 2020-2022 | ||||||||
Location: | Pulsnitz, Germany | ||||||||
Instrument: | 400mm Newton at f=1520mm | ||||||||
Camera Sensor: | Panasonic MN34230 | ||||||||
Orientation: | North is up (exactly) | ||||||||
Scale: | 0.8 arcsec/pixel (at full resolution) | ||||||||
Total exposure times: |
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Image processing steps where:
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