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(1 - 20 of 25)

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Note on some systematic differences between different systems of proper motions, with emphasis on the influence of the magnitude
Herk, G. van 1968
Note on some systematic differences between different systems of proper motions, with emphasis on the influence of the magnitude
Article / Letter to editor
open access
Proper motions, mean parallaxes and space velocities of RR Lyrae variables
Herk, G. van 1965
Proper motions, mean parallaxes and space velocities of RR Lyrae variables
Article / Letter to editor
open access
Internal motions and density distribution in a globular cluster
Oort, J.H.; Herk, G. van 1960
Internal motions and density distribution in a globular cluster
Article / Letter to editor
open access
Structure and dynamics of Messier 3
Oort, J.H.; Herk, G. van 1959
Structure and dynamics of Messier 3
Article / Letter to editor
open access
Preliminary results of measurements of flexure of the Leiden meridian telescope
Herk, G. van 1958
Preliminary results of measurements of flexure of the Leiden meridian telescope
Article / Letter to editor
open access
Vibrations observed with the Leiden meridian circle
Herk, G. van 1954
Vibrations observed with the Leiden meridian circle
Article / Letter to editor
open access
The influence of the spectral type of a star on its declination as derived from meridian-circle observations
Herk, G. van 1952
The influence of the spectral type of a star on its declination as derived from meridian-circle observations
Article / Letter to editor
open access
An attempt to analyse the influence of the Moon on the results of the international Latitude Service
Herk, G. van 1950
An attempt to analyse the influence of the Moon on the results of the international Latitude Service
Article / Letter to editor
open access
Observations of minor planets in 1943 and 1944
Herk, G. van 1946
Observations of minor planets in 1943 and 1944
Article / Letter to editor
open access
Observations of minor planets in 1942
Herk, G. van 1944
Observations of minor planets in 1942
Article / Letter to editor
open access
On the photographic recording of circle positions
Herk, G. van 1943
On the photographic recording of circle positions
Article / Letter to editor
open access
Observations of minor planets from 1941 January 31 to 1941 December 23
Herk, G. van 1942
Observations of minor planets from 1941 January 31 to 1941 December 23
Article / Letter to editor
open access
Determination of 293 positions of 15 minor planets in 1939
Herk, G. van 1941
Determination of 293 positions of 15 minor planets in 1939
Article / Letter to editor
open access
Observations of minor planets from 1940 Jan. 2 to 1941 Jan. 30 (Errata: 9 310)
Herk, G. van 1941
Observations of minor planets from 1940 Jan. 2 to 1941 Jan. 30 (Errata: 9 310)
Article / Letter to editor
open access
Determination of 256 positions of 14 minor planets in 1938 (Errata: 10 146)
Herk, G. van 1940
Determination of 256 positions of 14 minor planets in 1938 (Errata: 10 146)
Article / Letter to editor
open access
On the Leiden observations of the right ascension of Polaris (Errata: 9 448)
Herk, G. van 1939
On the Leiden observations of the right ascension of Polaris (Errata: 9 448)
Article / Letter to editor
open access
Note on G. C. 17919, a probable member of the Ursa Major cluster
Herk, G. van 1939
Note on G. C. 17919, a probable member of the Ursa Major cluster
Article / Letter to editor
open access
Positions of minor planets observed with the meridian circle
Herk, G. van 1937
Positions of minor planets observed with the meridian circle
Article / Letter to editor
open access
Proper motions of stars in the region of the Hyades
Herk, G. van 1936
Proper motions of stars in the region of the Hyades
Article / Letter to editor
open access
Positions of minor planets observed with the meridian circle
Herk, G. van 1936
Positions of minor planets observed with the meridian circle
Article / Letter to editor
open access

Pages