NGC 6891

Observation Notes:

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.

Object Information:

Discovered by Ralph Copeland in 1884. NGC 6891 is also cataloged as: PK54-12.1.

Subject NGC 6891
Classification* Planetary Nebula (2a(2b))
Position* Delphinus [RA: 20:15:08.85 / Dec: +12:42:15.2]
Size* 74″ x 62″
Brightness* 10.5 vMag
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 Plössl + 2X Barlow (240X) + UltraBlock
Conditions Partly Cloudy, calm
Seeing 6/10 Pickering
Transparency ~ Mag 6.0 NELM