IC 4406

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.

IC 4406
Emission nebula
Planetary nebula
Hubble Space Telescope view of IC 4406
Observation data: J2000 epoch
Right ascension14h 22m 26.278s[1]
Declination−44° 09′ 04.35″[1]
Distance2.0 kly (600 pc)[2] ly
ConstellationLupus
Physical characteristics
Absolute magnitude (V)-0.3
Notable features-
DesignationsRetina Nebula[3]

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]

See also

References
  1. "SIMBAD Astronomical Database". Results for IC 4406. Retrieved 2006-12-19.
  2. 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. 15. pp. 29–33. Bibcode:2003RMxAC..15...29O.
  3. 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.
  4. "Cutting-edge Adaptive Optics Facility Sees First Light - Spectacular improvement in the sharpness of MUSE images". www.eso.org. Retrieved 4 August 2017.
  • Media related to IC 4406 at Wikimedia Commons


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