Occultations
Since many years, Swiss amateur astronomers are engaged in the observation and the recording of occultations of stars, caused by astronomical bodies such as asteroids, comets, moons and planets. Each observation will be reported to the European Section of the International Occultation Timing Association (IOTA/ES). Doing so, the group provides valuable data for astronomical science. This site documents the activities and shows the results of the observations.
Swiss Occultation Numbers
The Swiss Occultation Numbers (SON) are a statistical summary of the monthly observations and are frequently published in the astronomical magazine "ORION".
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Swiss Occultation Numbers |
Archieve
The following links contain the reports of observed occultations, made by SOTAS members and sorted by the year of observation.
In prominent cases, they are completed with the chords, resulted in combination with observers of the IOTA/ES community.
The chords are calculated and illustrated by Eric Frappa (until end of 2022) resp. by IOTA/ES. With many thanks for the permission to publish.
2025 | 2024 | 2023 | 2022 | 2021 |
2020 | 2019 | 2018 | 2017 | 2016 |
2015 | 2014 | 2013 | 2012 | 2011 |
2010 | 2009 | 2008 | 2007 | 2006 |
2005 | 2004 | 2003 | 2002 | 2001 |
2000 | 1999 | 1998 | 1997 | 1996 |
1995 | 1994 | 1993 | 1992 | 1991 |
1990 | 1989 | 1988 | 1987 | 1986 |
1985 | 1984 | 1983 | 1982 | 1981 |
Summary Reports
2017 Summary Report | Minor Planet Circular (vacant). |
2016 Summary Report | Minor Planet Circular 104988. |
2015 Summary Report | Minor Planet Circular 94399. |
2014 Summary Report | Minor Planet Circular 89395. |
History
Star occultations in Switzerland |
Die positiven Sternbedeckungen in der Schweiz von 1997 bis 2017 (und auch vorher). by Stefano Sposetti. |
Ancient article about a visual observation (Orion No. 243) |
Eine Sternbedeckung durch einen Planetoiden. by Christof Sauter. |