Monthly Archives: November 2012

Emission nebula in Cassiopeia – IC1795

Glowing gas and obscuring dust of the emission nebula IC1795 – part of the Heart Nebula (NGC896) – located in a complex of star forming regions at the edge of the large molecular cloud in the constellation Cassiopeia. The colours in the image were created using the Hubble palette which maps emission from oxygen, hydrogen, and sulphur atoms to blue, green and red.

Right ascension: 2h 26m 50.8s | Declination: +62° 00′ 48.2″ | Distance: 6,000 Light Years
Field of view: 57 x 38 arcmin

Camera: SBIG ST-10XME
Telescope: William Optics Megrez 120 F/7.5
Guiding: Starlight Xpress Active Optics (SXV-AO-LF) unit
Filters: Baader Ha (7nm), OIII (8.5nm), SII (8nm)
Exposures: Ha 20 x 15 min; OIII 24 x 15 min; SII 26 x 15 min
Total exposure: 17.5 hours
Image composition: Colour Mapped Narrowband Ha:SII:Ha:OIII
Scale: 1.56 arcsec/pixel
Image acquired: 5, 6, 10 & 14 November 2012 from Bristol (UK)

Image capture with MaxIm DL, FocusMax, ACP; Image processed with MaxIm DL (Fat Tail Deconvolution, DDP), Photoshop CS4

PlaneWave CDK 12.5 operational at AstroCamp

I am just back from a four day visit to the AstroCamp observatory in the mountains of S.E. Spain where I finalised the installation of my PlaneWave CDK 12.5 telescope. The system is now ready to Go Live on the iTelescope.net network later this month. The system specification is presented below.

Instrument Package:
CCD: KAF-6303E (NABG)
Pixel Size: 9um square
Resolution: 0.73 arc-secs / pixel
Cooling: Set to -25°C
Array: 3072 x 2048 (6.3 Megapixels)
FOV: 37.41 x 24.94 arc-mins
Filters: Astrodon Series E LRGB, Astrodon 5nm Ha, SII, OIII, Photometric V

Telescope Optics:
OTA: Planewave CDK
Optical Design: Corrected Dall-Kirkham Astrograph
Aperture: 318mm (12.5”)
Focal Length: 2541mm
F/Ratio: f/7.9
Guiding: External 80mm guidescope with Atik 314L+ guider
Mount: Paramount PME

The system is hosted by AstroCamp – a remote telescope hosting facility set up in 2009 by a group of Spanish astronomers. The observatory is situated at an elevation of 1,660 metres above sea level near the village of Nerpio in Albacete, S.E. Spain. It is surrounded by the mountain ranges of Granada and Murcia and the Cazorla National Park with no big towns or cities with 200 km radius. Consequently it offers very dark skies with a Sky Quality Meter (SQM) reading of ≥22 magnitude per arcsecond squared and over 200 clear nights per year.