# Astronomical Almanac

The Astronomical Almanac is compiled and published by the Institute of Geodesy and Cartography in Warsaw, annually since 1946, since 2002 also in *pdf*, and as of 2015 in part version "on-line".

The Yearbook is the source of data used in the astro-geodetical measurements, and the source of up-to-date information about the latest systems and reference frames adopted by the International Astronomical Union and the International Union of Geodesy and Geophysics. It is also the source of many astronomical data used in teaching astronomy and geodesy, and by amateurs.

## Astronomical Almanac 2024

LXXIX volume of the Astronomical Yearbook for 2023 in electronic format (*pdf*) is a continuation of the previous editions in unchanged form.

The electronic edition of the almanac is suplemented by a traditional printed version in shortened form, as well as an on-line version. At the moment the Astronomical Almanac "On-line" includes two calculators. The "Calculator of the Apparent Position of stars" allows to calculate the apparent position of all stars of the FK5, FK6, Hipparcos and Gaia catalogs, in the FK5 System as well as in the IRS. The "Calculator of Mean Posiotion and Besselian Numbers" alows to calculate the apparent position in the FK5 system, in an '*old fasion*" way, i.e. using mean positions of stars for mid-year epoch and the associated Besselian Numbers.

## Astronomical Almanac 2023

LXXVIII volume of the Astronomical Yearbook for 2023 in electronic format (*pdf*) is a continuation of the previous editions in unchanged form.

The electronic edition of the almanac is suplemented by a traditional printed version in shortened form, as well as an on-line version. At the moment the Astronomical Almanac "On-line" includes two calculators. The "Calculator of the Apparent Position of stars" allows to calculate the apparent position of all stars of the FK5, FK6 and Hipparcos catalogs, in the FK5 System as well as in the IRS. The "Calculator of Mean Posiotion and Besselian Numbers" alows to calculate the apparent position in the FK5 system, in an '*old fasion*" way, i.e. using mean positions of stars for mid-year epoch and the associated Besselian Numbers.

## Astronomical Almanac 2022

LXXVII volume of the Astronomical Yearbook for 2022 in electronic format (*pdf*) is a continuation of the previous editions in unchanged form.

The electronic edition of the almanac is suplemented by a traditional printed version in shortened form, as well as an on-line version. At the moment the Astronomical Almanac "On-line" includes two calculators. The "Calculator of the Apparent Position of stars" allows to calculate the apparent position of all stars of the FK5, FK6 and Hipparcos catalogs, in the FK5 System as well as in the IRS. The "Calculator of Mean Posiotion and Besselian Numbers" alows to calculate the apparent position in the FK5 system, in an '*old fasion*" way, i.e. using mean positions of stars for mid-year epoch and the associated Besselian Numbers.

## Astronomical Almanac 2021

LXXVI volume of the Astronomical Yearbook for 2021 in electronic format (*pdf*) is a continuation of the previous editions in unchanged form.

The electronic edition of the almanac is suplemented by a traditional printed version in shortened form, as well as an on-line version. At the moment the Astronomical Almanac "On-line" includes two calculators. The "Calculator of the Apparent Position of stars" allows to calculate the apparent position of all stars of the FK5, FK6 and Hipparcos catalogs, in the FK5 System as well as in the IRS. The "Calculator of Mean Posiotion and Besselian Numbers" alows to calculate the apparent position in the FK5 system, in an '*old fasion*" way, i.e. using mean positions of stars for mid-year epoch and the associated Besselian Numbers.

## Astronomical Almanac 2020

LXXV volume of the Astronomical Yearbook for 2020 in electronic format (*pdf*) is a continuation of the previous editions in unchanged form.

*old fasion*" way, i.e. using mean positions of stars for mid-year epoch and the associated Besselian Numbers.