Sh2-290
Sh2-290 is an ancient planetary nebula. It is one of the largest known planetary nebulae, with a diameter of about 7 parsecs. The bluish interior is from energized oxygen atoms. The bright side of the nebula is due to its interaction with ambient interstellar gas.
| Observatory: | Kitt Peak National Observatory Kitt Peak, Arizona |
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| Telescope: | KPNO 4-Meter |
| Instrument: | Mosaic I |
| Astronomer: | T.A. Rector (University of Alaska Anchorage) and H. Schweiker (WIYN and NOAO/AURA/NSF) |
| Date of Observation: | 02-14-2012 |
| Filters and Assigned Colors: | Hydrogen-alpha (red), Oxygen [OIII] (blue) and Sulfur [SII] (cyan) |
| Exposure Times: | 4x8min in H-alpha, 5x10min in [OIII] and 5x8min in [SII] |
| Location of Image: | Cancer |
| Field of View: | 20.8 x 21.4 arcmin |
| Orientation: | North is left, East is down |
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| Link to Full Resolution Image | |
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