The Heliacal Rise of Sirius-Observations and Computational Algor

Title: The Heliacal Rise of Sirius-Observations and Computational Algorithm 

Author: Rumen Kolev (1960-)
Language: English
Year & place: 2006, Varna, Bulgaria
Pages:    8
Content: Detailed description of 3 observations of heliacal rise of Sirius in Seattle, USA and Varna, Bulgaria.  
A formula is deducted for computing the arcus visionis and the h. rise of Sirius as a function of the extinction of the atmosphere.
Explained is how to measure the atmospheric extinction with observation of the night-rise of stars.
The passage in Censorinus about the h.rise of Sirius is given in Latin and translation and is discussed.

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