Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005asuai...1...10p&link_type=abstract
Astronomia. La rivista dell'Unione Astrofili Italiani (ISSN 0392-2308), N. 1, p. 10 - 15 (gennaio-febbraio 2005)
Astronomy and Astrophysics
Astronomy
Sun: Observations, Solar Activity, Sunspots
Scientific paper
The paper presents the observations collected by the UAI's Sun Section through 2002. The good quality of the results obtained by the observers confirms the high standard of their observations. The activity of the Sun is described in terms of number of spots, Wolf Number (NW), group's number and their area. 2132 daily reports were received, with a mean of 5.8 observations/day, covering more than 84% of the year. The decreasing in the photospheric activity after the maximum reached in 2000 was definitely ascertained.
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