Column label: OBSE

The values in this column are the corresponding hour angles of the eastern ``observation'' limits, in decimal degrees. An accuracy of about 0.1 degree is adequate. Most telescopes read out hours and minutes instead; these should be acceptable inputs to the table-making program, which should do the conversion. If hours and minutes of time are read, try to read hour angles to the nearest minute or better.

In some cases, hour angles east of the meridian are read as negative values; in other cases, values will lie between $180^{\circ}$ and $360^{\circ}$( $12^{\rm h}$ and $24^{\rm h}$). Both styles should be acceptable. The minus sign may be omitted if the values are numerically smaller than $180^{\circ}$ ( $12^{\rm h}$).