Time is UT at start of observation and duration of observation follows the time.
Seeing gives two values:
- the actual "seeing" condition representing stability of the atmosphere on scale of 0 (terrible) to 10 (perfect)
- the transparency of the atmosphere on a scale of 0 (almost obscured) to 5 (perfectly clear).


The observations on April 9, 1961 were near inferior conjunction where Venus was less than eight degrees north of the sun.

Astronomy Index