NGC 6781 – PLANETARY NEBULA

Aquila

(ra: 19,18.4 / dec 06:33)

DATA

TYPE Planetary Nebula

VISUAL MAGNITUD: 12

SIZE: 1.8 arc minutes

DISTANCE: TBC

OBJECT DESCRIPTION

NGC 6781 is a fine planetary nebula and quite bright due to its brightness surface. The Nebula presents a almost perfect bubble of gas emited by a single sun like star that died some time ago. The nebula we see is the ejected surface of the star expanding into material left from an earlier stage. At 16.8 magnitude, the central star (a white dwarf) was barely detected at f6.3 by the SXV M7. However sky conditions were far from good... I was unable to take the R channel whcih was replaced by the Ha

IMAGE INFORMATION 

SCOPE: Celestron SCT 8 at f6.3. Vixen GPDX with Sky Sensor 2000

GUIDING: Synta 70/400 refractor, SXV guidecam Astro Art Control interfase 3.72 Plug in

IMAGE ADQUISITION: Astro Art 3.0

SKY CONDITIONS: pretty bad. Visual limit magnitude 3 (the adquisition was suspended due thin clouds coming in )

CAMERA: Starlight Xpress SXV7at @ f6.3

FILTERS: Astronomik Type II, Astronomik Ha 6nm

EXPOSURES: LHaGB (10,10,3,3) 1 minute subs

PROCESSED: Darks, bias (no flats) in Images Plus, Photoshop CS