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.

Freeware!

Observation Manager Click to join AA5ObsMgr

Click to join AA5ObsMgr

Cloud sensor -Pi build

Just completed the design of a cloud sensor to replace the one that died.

The system has a telnet server built into the Pi. This allows remote systems to access the sensors and display the IR sky temperature, barometric pressure and humidity. The IR sensor is quite accurate and has internal calibration.

As you can see the IR sensor is being tested measuring the heatsink temperature of the Pi.

I have also built remote displays to communicate with the sensor system.

Remote display
IR and Humidity/Barometric sensors.

DE Cvn Binary System- Data Needed

Hi everyone. I need time series data on this system. To include mid minima timing in BJD format. I am starting a research project on this star.

Email me if you have any early pre 2009 data.

Thanks,

John

Source of reference stars where you can check for suitability as reference.

Link to the online version..

https://aladin.u-strasbg.fr/AladinLite/

New Astroart7.0 -Python automation suite.

We now have all the elements to fully automate time series star measurement and processing. This includes:

JD to BJD conversion

Accurate Minima Detection (Using Kwee van Woerden solution)

Production of all plots and data files for Phase folded plots.

Scripts can be run for specific tasks, like startup, production of calibration frames. The capture and measurement of specific projects. (Variables, SN Type1a, Etc)

All based on standard Python3 scientific packages.

Get in touch if you need information.

Paper on objects round eclipsing binary stars.

The paper is now on the archive of scientific papers:

https://arxiv.org/abs/1911.00125

Quite a significant amount of new data from our group. Some interesting departures from early expectations. It will clearly take some ongoing research to identify the mechanisms that are producing some of the effects.

Seems to be getting some interest!

Someone asked “Isn’t there an easier way than building an Observatory”

Yes, I did it once while I was building a new observatory. It took me just 3 hours to build!!

Roll Off Shed
Roll off shed design.

Thick marine ply base with 6 castors to help keep it from flexing, cut out for scope pier. Even put in a dehumidifier. Mine was a bit messy as it was only temporary. Cheap though! And… Fast to start up. I really liked this solution. Mrs also thought it was ok in the garden.

This would be ideal for small gardens or even one of Patrick Moores concrete observatory bases.

New light curve for binary NSVS14256825.

New light curve for NSVS14256825 binary.

Standard plot of mag against time.

Check plot to look at a check star

Getting a bit low (30deg at end)

Clear night 22nd July 2019

Great night for planet spotting. Really nice stable conditions. Also got a quick pic of M51 single frame 500sec.

M51 no filter 500sec.

Also got a really nice plot of NSVS 01286630 Orbit 11499 primary eclipse.

Mag against time 170 images at 60 sec

Partial Eclipse 16-July 2019

Not the usual view of the moon.. Taken with my phone!

Partial Eclipse of the moon 16-July 2019
Partial eclipse

Want to get started in astronomy on a budget?

Thanks for writing this handy guide.. Now in the LINKS page.