Back NGC7635Bubble Nebula in Emission-Line Click to display the full resolution Object InfoTypePlanetary NebulaConstellationCassiopeiaDistance11,000 ly Capture DetailsDateDecember 6, 2005LocationCarlsbad, CAExposureSII 4x15 (bin 2x2), Ha 25x10 (bin 1x1), OIII 4x15 (bin 2x2) as RGBNotesThe Ha data was collected by the C11 on 10/29/04. The SII and OIII were collected by the FSQ-106 on 12/06/05 EquipmentOpticsCelestron C11 / Takahashi FSQ-106NFocal Length1764mm @f/6.3MountCelestron CGECameraSBIG ST-2000XMFocuserOptec TCF-S / Robo-FocusFiltersAstronomik 13nm Ha, Astrodon 6nm SII, OIIISoftwareCCDSoft 5, Maxim DL 4, Photoshop cs