O-III filter. Best view of nebula. Lobed structure present. Interior hollow is visible, hints of finer structure as seeing allowed. Central star is not visible in this view.
sketches : Nebulae : NGC 7293 Helix Nebula PN 11-22-2003 |
Back |
NGC 7293 Helix Nebula PN 11-22-2003 |
NGC 40 planetary nebula 11-22-2003 |
NGC 7293 Helix Nebula PN 11-22-2003 |
NGC 40 planetary nebula 11-22-2003 |
Copyright © 2003-2007 Michael Portuesi. See the front page for licensing information.