Double star measurements

Double stars observations

I already made a two entries about observing and measuring double stars (here and here). Over last one year and half I had a few sessions with this…


1304 Arosa photometry

1304 Arosa asteroid is yet another main belt object that orbits the Sun in 5 years and 9 months. Arosa diameter is estimated to 40km, and it is…


REDUC for double stars

Reduc description Not so long time ago I made an entry about measuring double stars with AstroImageJ software. Then I found out about dedicated…


Measuring doubles

Astrometry with CCD (or CMOS) cameras can be very useful tool for measuring separation and position angle of double and multiple stars. When…


(367) Amicitia

Amicitia is typical main belt asteroid. It orbits the Sun during 3 years and 112 days in average distance of 2.22 astronomical units (about 340 mln…


1321 Majuba photometry

(1321) Majuba is one of very many asteroids in the Solar System. It orbits around Sun with the period of 5 years and 21 days in the average distance…


12.41 billion years away

It has been already over four years since I started to "hunt" for distant worlds (usually it is quasar) at my images. The area around M101 galaxy…


Finding variable stars with Muniwin

In this entry I would like to quickly show how Muniwin supports finding of variable stars. As input data you will need images of the same sky area…


Photometry with Muniwin

Measuring variability of celestial objects brightness is one of the most rewarding task, that can be picked up by astronomy amateur. Variable stars…


V0799 Aur photometry

Last night again I pointed telescope to a variable star for 120 minutes. This time it was V0799 Aur variable (…


Huge and fast

Among plethora of variable stars there is large subset of really fast changers. It is really amazing, how these huge blobs of plasma can change their…


Crazy Egeria

Last night I spent on (13) Egeria asteroid photometry. It is large and irregular object that rotates with period of 7.045 hours, so during winter…