(This is English page, you can choose Finnish beginners page here)
I am Mr. Kari A. Tikkanen, member of URSA.VSS. I'm also member of Arktos and have sended my unregular variable observations to AAVSO. I have observed some variable stars visually with my binoculars 10x50 and 12x50 and Newton 114/900 telescope.
Here are 'end results' of my observations of regular variables: Eclipsing binaries, RR Lyr and Cepheids.
I have such somebit radical view that visual estimates can be recorded
in two decimal accuracy instead of standard one decimal way. This has two advantages:
First: light curves on computer screen have already been randomized.
Second: At least on some cases estimation accuracy is really better than 0.1 mag and standard cutting to one decimal would cause discrete errors.
I have sent previous Beta Lyrae and RZ Cassiopeiae observation data to
Now I have made exact timings of minima of eclipsing binaries myself and sent
Swiss Astronomical Society (BBSAG).
My exact timings are to appear in Bulletin nro 122,123,... etc. I have made my timings nowadays using so called Tracing Paper -method. Couple of my curves has been published in book:
Gerry A. Good, Observing Variable Stars, PATRICK MOORE'S PRACTICAL ASTRONOMY SERIES, Springer-Verlag, London, 2003.
MY RECENT PLANS AND IDEAS
In Dec 1999 I started my own CAMDRA-project, where my goal is to observe as many eclipsers as possible in constellations of Camelopardalis and Draco.. I have tried to select eclipsers for which dmag>0.3 and maxmag<12.
In Sep 2001 I got Idea about Stereo Star-project. I look though binoculars. Another view is from sky. Another view is from diafilm of stars. But I don't have proper dia film yet. And difficulties and troubles... Bortle or somebody has tried and didn't succeed.
In Nov 2001 I started my own Bright Star-project. Goal is to observe 107 brightest nothern stars more or less regularly. I'll monitor if they change. I also observe extinction and my eyes sensitivity to red stars etc.
In Dec 2001 I started to observe more or less unresolved Hipparcos eclipsers from web-list that I was told by Timo Kinnunen. This freezed my Bright Star and Stereo project temporarily. First I solved V355 AND period. I think I have approx. period of V455 AUR etc. I'm quite enthusiastic about these now. My small binoculars can beat largest and finest telecopes in the world.. ;)
Some of my drawings from my diary: Drawings (Fata Morgana, Comet Ikeya-Zhang)
More of my favourite Astronomical LINKS here.
VISUAL LIGHT CURVES
In this web-site I introduce my visual light curves of variable stars I have observed. They are showed in so called superposition graphs. It means all points are folded by phase. If they are regular with certain period then general form of periodical curve should appear. Periods are usually got from GCVS4 database. Coordinates are epoch J2000.
Usually Eclipsing binaries(EB)-observations are made according to ephemeris. It means I have computer calculated approx. time when minimum should happen in the evening. But I have exceptions. I often observed for ex. W UMA and AW UMA and V566 OPH and AO CAS quite randomly too. And expecially for some small amplitude variables I used random (#) method totally. Without any ephemeris (prediction) for those. Advantage is that expectations don't much affect to observations and so the minima are much more objective.
MY LIGHT CURVES OF STARS SORTED BY CONSTELLATIONS:
(* means not proper curve yet)
(# means Random observation method , without ephemeris)
Here You can Find Ephemeris (Predictions) for my binaries - Updated for Jan & Feb 2001 (Finnish winter time)
You can Find finder some Beginners ASCII Charts HERE
Real fine Charts, Predictions, Bulletins you can find here BBSAG. Choose "Predictions" for Prediction and Charts.
FUN with RZ CAS! Heliocentricity and finite light speed shown here: EVIDENCE FOR HELIOCENTRICITY
The Observer, who also made curves above and computer programs for those, is
Mr. Kari A. Tikkanen,URSA.VSS, AAVSO(TKK)
email : ktikkane@mailREMOVETHISS.student.oulu.fi