About Astrojohn

I am a science geek! Interests Astronomy, Skiing, Philosophy, basically any form of technology including writing automation software for my observatory. I will also share this with others using the same EQMOD/Astroart tool set.


Observation Manager Click to join AA5ObsMgr

Click to join AA5ObsMgr

New Data on NSVS 01286630 a close binary star system.

Binary star measurement.

Using the time variations of the eclipses we are able to calculate the orbit of possible companion objects big enough to have an effect on the orbital period of the binary pair.

The picture below is the plot of light magnitude from the binary pair. The timing of this minima is then corrected for our orbit round the sun and further corrections to give the precise time of the eclipse.

many of these are measured to find orbital variation caused by third objects.

Light curve for NSVS 01286630


A star 465 Light years away from earth. Has a planet around it that was first confirmed in 2012. So I thought I would use my observatory to look at the transit of that planet. A very small dip in the light from the star.

HAT-P-12b planet

Unfortunately I could not get the entry into eclipse due to cloud and this makes the plot a bit distorted. This is at the exit from transit at 22:00 UTC on the 25-4-2019.

Veil Nebula in Cygnus

The Veil Nebula is a cloud of heated and ionized gas and dust in the constellation Cygnus.
A supernova remnant, many portions of which have acquired their own individual names and catalogue identifiers. The source supernova was a star 20 times more massive than the Sun, which exploded around 8,000 years ago. The distance to the nebula is not precisely known, but data supports a distance of about 1,470 light-years.

Just taken with R,G,B Filters a stack of 3 x 400sec images for each filter. Darks and Flats from the current library. Taken from Selsey with the RC Astrograph and Starlight Xpress H694 camera at -12c.

New Download Page.

New Download page!

I have upgraded the download page. Any additional information required just send me an email.


Eclipse of the moon!

Eclipse of the moon

You will need to know the format of files in your TEMP files

I have included a sample TEMP file for the ObsMGr10. This gives you the file naming conventions I have used for Master Darks and Flats:
MD30B1 for example is a 30 sec master dark binned 1X1
For the flats the names are more obvious except that after L,R,G,B I have used filter slot numbers. eg I have a Johnson V filter in slot 6.

Hope you can make sense of this.

Clearly there is a lot of system setup to do before you have full automation, but once done it makes life very easy to get say 100 variable star measurements for a time series curve. All automated and checked for accuracy and noise level.

Hope this helps.

Observation manager 10 for Astroart 7.0 Now on Download!

As requested the new Observation manager and Script Runner for Astroart 7.0 with all the new automation features for preprocessing and time series variable image collection and processing now available.

You will also need a temp file on the desktop for all your images and log files.
You can put this anywhere as long as you define the location in your Param2 file.

Any questions just email me at web@astro.me.uk


One of the nicest tree tunnels in UK

This is Halnaker Tunnel near Chichester.   Really photogenic tree lined tunnel


Halnaker Tunnel

Clear night at Woodland Observatory – 8/10/2018

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

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

Type Ao with SA200 grating