IC 4406
| Emission nebula | |
|---|---|
| Planetary nebula | |
 Hubble Space Telescope view of IC 4406 | |
| Observation data: J2000 epoch | |
| Right ascension | 14h 22m 26.278s[1] |
| Declination | −44° 09′ 04.35″[1] |
| Distance | 2.0 kly (600 pc)[2] ly |
| Constellation | Lupus |
| Physical characteristics | |
| Absolute magnitude (V) | -0.3 |
| Notable features | - |
| Designations | Retina Nebula[3] |
IC 4406 is a planetary nebula near the western border of the constellation Lupus, the Wolf. It has dust clouds and has the shape of a torus. Despite this, it looks somewhat rectangular because it is seen from its side as viewed from Earth, almost in the plane[2] of its equator.
Structure
IC 4406 is bipolar and appears to be a prolate spheroid with strong concentrations of material in its equator.[3] This kind of structure is a natural product of a bipolar model.[3] The knots of IC 4406 have a "lacy" appearance and have no ordered symmetry towards the central star.[2] The knots have no tails.[2] None of the features have bright edges.[2]
Gallery
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![IC 4406 seen with MUSE instrument and the Adaptive Optics Facility.[4]](//upload.wikimedia.org/wikipedia/commons/thumb/f/f4/The_planetary_nebula_IC_4406_seen_with_MUSE_and_the_AOF.jpg/119px-The_planetary_nebula_IC_4406_seen_with_MUSE_and_the_AOF.jpg)
IC 4406 seen with MUSE instrument and the Adaptive Optics Facility.[4]
![IC 4406 seen with MUSE instrument and the Adaptive Optics Facility.[4]](/wiki/File:The_planetary_nebula_IC_4406_seen_with_MUSE_and_the_AOF.jpg)
See also
References
- ^ a b "SIMBAD Astronomical Database". Results for IC 4406. Retrieved 2006-12-19.
- ^ a b c d e O'dell, C. R.; Balick, B.; Hajian, A. R.; Henney, W. J.; et al. (2003). "Knots in Planetary Nebulae". In S. J. Arthur & W. J. Henney (ed.). Revista Mexicana de Astronomía y Astrofísica (Serie de Conferencias). Winds, Bubbles, and Explosions: a conference to honor John Dyson, Pátzcuaro, Michoacán, México, September 9–13, 2002. Vol. 15. pp. 29–33. Bibcode:2003RMxAC..15...29O.
- ^ a b c O'Dell, C. R.; Balick, B.; Hajian, A. R.; Henney, W. J.; Burkert, A. (2002). "Knots in Nearby Planetary Nebulae". The Astronomical Journal. 123 (6): 3329–3347. Bibcode:2002AJ....123.3329O. doi:10.1086/340726.
- ^ "Cutting-edge Adaptive Optics Facility Sees First Light - Spectacular improvement in the sharpness of MUSE images". www.eso.org. Retrieved 4 August 2017.
External links
Media related to IC 4406 at Wikimedia Commons
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