any content that aids in observing practices
There are over 100 new and revised charts and sequences since the last update in November. Many of these are for stars in the newly formed YSO Section Program, southern stars with new photometry from APASS and campaign targets. The rest are revisions based on issues reported to CHET and requests for new sequences from our observers.
Complete Manual: Vizuális Változócsillag-észlelők Kézikönyve (7.3 MB)
Sections:
BEVEZETÉS (354 KB)
1. FEJEZET – ELŐKÉSZÜLETEK (915 KB)
The 2012 JD Calendar is now available.
Just go to the JD Calendar page and scroll down to the bottom where you will be able to view or download the new calendar.
Happy observing!
The following stars (objects) have new or revised sequences as of September 29, 2011.
Please update your charts if you observe any of these objects.
The late Bob Nelson developed over 5800 O-C (Observed - Computed) files for eclipsing binaries, all in Excel format, which we are hosting on our site. The purpose of this database is to provide information on period variation for selected eclipsing binaries (for astronomers interested in a particular star), as well as to determine the best elements for predicting future eclipses. These elements go into eclipse prediction software, like at Shawn Dvorak's site (Bob and others help provide updated elements for Shawn).
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THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
Tel.Predicted Dates of Maxima and Minima of 381 Long Period Variables for 2011
Complete Manual - Manual para Observação Visual de Estrelas Variáveis (8.2 MB)
Published 1 September 2011
Sections:
The 2011 JD Calendar is now available.
When the ultraviolet rays from the Sun hit the Earths atmosphere the energy they possess work to knock electrons off of the atoms and molecules that the atmosphere is made up of. These free electrons make up a region of the atmosphere known as the Ionosphere. The region is strongest on the daytime side of the earth since it is dependant on the energy from the solar ultra violet rays.