This was my fourth and final observation and sketch during my recent night at Anderson Mesa. I picked it from my Bright Star Atlas since it was a convenient find next to the tail of Delphinus. Sky Atlas 2000.0 provided the star hopping route. At low power (37.5X), it stood out as a brighter star that really liked averted vision. At 240X, it took on a double-shelled appearance with a brighter, but non-stellar peak at the core. It exhibited a pale, aqua-gray color. I didn’t end up using the UHC filter on it, since dawn was making its presence known, and I was feeling pretty wiped out.
Discovered by Ralph Copeland in 1884. NGC 6891 is also cataloged as: PK54-12.1.
|Classification*||Planetary Nebula (2a(2b))|
|Position*||Delphinus [RA: 20:15:08.85 / Dec: +12:42:15.2]|
|Size*||74″ x 62″|
|Date/Time||July 3, 2008 – 4:00 AM MST (July 3, 2008 – 11:00 UT)|
|Observing Loc.||Anderson Mesa, Arizona, USA|
|Instrument||Orion SkyQuest XT8 (203 mm dia./1200 mm F/L)|
|Eyepieces/Mag.||10 mm Sirius PlÃ¶ssl + 2X Barlow (240X) + UltraBlock|
|Conditions||Partly Cloudy, calm|
|Transparency||~ Mag 6.0 NELM|