Rocznik astronomiczny : obserwatorium krakowskiego.
Cracovia : Astronomical Observatory, Jagiellonian University, 1990.
137 págs.
Serie: International Supplement ; no. 61
ISBN: 8301098171
Contenido
- Ephemerides of eclipsing binaries for the year 1990
- ephemerides of RR Lyrae-tipe variables for the year 1990
- Geocentric ephemerides of the librations points L4 and L5 in the Earth-Moon and Sun-Venus systems for the year 1990.