Astrojohn

Clear night at Woodland Observatory – 8/10/2018

By John

The sky was clear but a lot of heat rising from the ground.
3 X 300 seconds for R G B with RC Astrograph
Processed with Observation manager 9.12e using Astroart 7 script interface.

Latest Spectra of bright star Phad in Plough

By John

This is an easy one as it is an A0 spectral type.

Type Ao with SA200 grating

Horsehead Nebular – Last night 150 sec X 3 per colour

By John

Interesting that a medium sized telescope can find objects orbiting stars 880LY away!

By John

Yes, this is the result of a star measurement session. A time series of V filtered measurements of RW Tri at 880LY.
From this information you can estimate sizes of objects and rotational period.

RW Tri Time Series.

It is 2017 and to start the New Year– Orion Nebular!

By John

I just love this nebular. Star forming area of dust and gas. This is a better image than before Xmas.
Two sets of exposures to get the core and the dust areas.

Techy bit: 3 x 100sec per RGB and 4 X 130sec L merged with 3X 60sec per RGB and 4 X 60sec Luminance. Taken with 8inch RC astrograph with a Trius H694 camera running ar -12C. Filter system is StarlightXpress Mount is AzEq6 pro.

Orion Nebular

Cacoon Nebula 8 Sept 2016

By John

Ok I have taken quite a good image of this tricky nebula.
Take a look on the web and look at some of the images.
4 X 400sec per RGB. No darks. (had to manually take out a couple of hot ones)