Today:   Time of rise and set of Sun and Moon.
    AAVSO Target Tool (answers the question "What should I observe tonight?")
permanently:   Call for observation: RZ Cassiopeiae
The constellation of Cassiopeia is circumpolar and visible the whole night during the whole year. The star RZ Cas is a close binary eclipsing system. Its components are rounding themselves with a period of about 28.686 hours. The primary minimum lasts 4.9 hours and can be observed within one night at certain dates. The brightness varies between 6.18 (maximum) and 7.72 mag (primary minimum).
For planning of the observation, a "Time of Minimum" calculator is available.
permanently:   Call for observation: V0959 Oph
Robert Glaisen performed brightness measurements on the star V0959 Oph (a Delta Scuti variable). He was able to determine both the amplitude and the period of the brightness variations. The remarkable thing about his results is that they do not correspond to the currently published values, neither those of the AAVSO nor of GCVS. After this finding, further observations suggest themselves. Hence the questions:
- Who has also observed the variable V0959 or has further information about it?
- Who would like to participate in a joint observation campaign? A working group could be formed for this purpose.
If further observations support Robert Glaisen's findings, we would inform the AAVSO.
Thank you for your assessments and cooperation in this interesting project.


March 3, 2018:   Meeting with Exoplanet Workshop at the Observatory Zimmerwald, considering the data reduction using the software AstroImageJ.
Invitation,  Protocol,  Script part A,  B,  C,  D