The sunspot observations made in 1987
Abstract
Photospheric observations made in Istanbul in 1987 are used to determine the heliographic coordinates of sunspots from drawings of observable sunspots and faculae on a projected disk of the sun. Tables are presented, showing the numbers and heliographic coordinates of the groups, the first and last observation dates, and the evolution of the groups according to McIntosh Sunspot Group Classification.
- Publication:
-
Istanbul University Faculty Science Review Serie C
- Pub Date:
- 1988
- Bibcode:
- 1988IsRvC..53....1M
- Keywords:
-
- Faculae;
- Photosphere;
- Spectroheliographs;
- Sunspots;
- Refracting Telescopes;
- Solar Physics;
- Tables (Data);
- Solar Physics