HST view of IC 4406
|Right ascension||14h 22m 26.278s|
|Declination||−44° 09′ 04.35″|
|Distance||2.0 kly (600 pc)|
|Apparent dimensions (V)||30″|
|Radius||0.13 × 0.45 ly|
|Absolute magnitude (V)||-0.3|
|Other designations||Retina Nebula|
|See also: Planetary nebula, Lists of nebulae|
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 of its equator.
IC 4406 is bipolar and appears to be a prolate spheroid with strong concentrations of material in its equator. This kind of structure is a natural product of a bipolar model. The knots of IC 4406 have a "lacy" appearance and have no ordered symmetry towards the central star. The knots have no tails. None of the features have bright edges.
- "SIMBAD Astronomical Database". Results for IC 4406. Retrieved 2006-12-19.
- O'dell, C. R.; Balick, B.; Hajian, A. R.; Henney, W. J.; Burkert, A.; Balick; Hajian; Henney; Burkert (2003). "Knots in Planetary Nebulae". Winds, Bubbles, and Explosions: a conference to honor John Dyson, Pátzcuaro, Michoacán, México, September 9-13, 2002 (Eds. S. J. Arthur & W. J. Henney) Revista Mexicana de Astronomía y Astrofísica (Serie de Conferencias) (http://www.astroscu.unam.mx/~rmaa/) 15: 29–33. Bibcode:2003RMxAC..15...29O.
- 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.
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