ALPO Solar Section observations for rotations 1844-1849 (1991 Jun. 28 to Dec. 08)

Details ALPO Solar Section observations for rotations 1844-1849 (1991 Jun. 28 to Dec. 08) ALPO Solar Section observations for rotations 1844-1849 (1991 Jun. 28 to Dec. 08)

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jalpo..37..165t&link_type=abstract

Association of Lunar and Planetary Observers, Journal (ISSN 0039-2502), vol. 37, no. 4, p. 165-170

Astronomy and Astrophysics

Astronomy

Solar Atmosphere, Solar Corona, Solar Flares, Solar Prominences, Solar Rotation, Sunspots, Twenty-Seven Day Variation, Astronomical Photography, Drawings, H Alpha Line, Penumbras, Sunspot Cycle, Umbras

Scientific paper

This report summarizes the Association of Lunar and Planetary Observers
(ALPO) Solar Section observations for Rotations 1844-1849 in terms of
the morphology and development of sunspot groups. Sixteen observers from
five countries contributed visual drawings and photographs in
integrated- and Hydrogen-alpha light.

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