The Diary of Phenomena for the entire year is presented below in iCalendar format. To use, right-click the link below and save it to your computer. You will then be able to import it into any program that understands the iCalendar 2.0 format, such as iCal, Outlook, Google Calender, etc.asao_diary17.ics
These data are a selection of stars supplied by H. L. Johnson to serve as bright standards of the UBVRI photometric system. Included in the table are positions and associated photometric data and spectral types. Positions are given in J2000.0 coordinates. The photometric data are taken from Johnson et al. (Comm. Lunar Planetary Lab, Vol. 4, Pt. 3, table 2, 1966). The filter bands have the following effective wavelengths: U = 3600 Å, B = 4400 Å, V = 5500 Å, R = 7000 Å, I = 9000 Å. Known variable sources are marked in the "Notes" column. This list of Johnson standards was removed from the printed edition of The Astronomical Almanac beginning with the 2003 edition and is provided only through this website.