ASTEROID POSITIONS BASED ON THE DUSHANBE PART OF THE FON PROJECT OBSERVATIONS
DOI:
https://doi.org/10.18524/1810-4215.2020.33.216421Ключові слова:
data archives, digitized observations, catalog, asteroid positionsАнотація
Asteroid images identification and crea-
tion the positional catalogs based on digitized photograph-
ic observations of previous years were continued. Namely,
the cooperation between Ukrainian Virtual Observatory
(UkrVO) and the Institute of Astrophysics of the
Academy of Sciences of Tajikistan make it possible to
expand this work by involving numerous additional
archives of digitized observations and processing services
and thus obtaining new original data about the Universe.
The Dushanbe part of the Northern Sky Survey (FON
project) is represented by about 1570 photographic plates
obtained in 1985-1992 on the Zeiss-400 astrograph at the
Hissar Astronomical Observatory of the Institute of As-
trophysics of the Academy of Sciences of Tajikistan. At
present, their digitization and further scan processing con-
tinue until the final product is obtained in the form of a
catalog of equatorial coordinates and stellar magnitudes
for all registered objects on the plates. The equatorial co-
ordinates α, δ of all objects on the plates were obtained in
the Tycho-2 reference system at the epoch of exposure of
each plate. Photometry of stars for the plates was carried
out based on the principles implemented in the processing
of the plates of the FON project using photoelectric meas-
urements of stars to construct the characteristic curves of
the plates. Photographic B-magnitudes of objects were
calibrated with photoelectric standards.
In parallel with solving the main task of the project to cre-
ate a catalog of stars and galaxies, we analyzed the results of
processing the plates to search for images of asteroids and
comets and create a catalog of their coordinates and values.
About 300 positions of asteroids and comets were obtained
with visual magnitudes from 7 to 16.5. All positions of the
asteroids were compared with the ephemeris. A preliminary
analysis of the O-C differences and their comparison with
similar results obtained from the digitized observations of the
Kyiv and Kitab parts of the FON project are conducted.
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