Midheaven

The Tenth House or Midheaven
The Tenth House deals with career, reputation and social standing. In a natal chart this house indicates how ambitious the subject is, and how likely they are to fulfill their ambitions.
The Eleventh House ...

--Aspects to the Ascendant and the Midheaven are often unreliable un- less you are absolutely sure of the minute of birth, and as clocks are fre- quently off time and there is much confusion in regard to different kinds of time, ...

The fact that the axis of the diagram puts the midheaven/nadir axis on the cusps of Aquarius and Leo could indicate it was composed in the "Platonic month of Leo," 10800 BC to 8000 BC, as the vernal equinox precessed.

who, after a struggle for existence and the development of his power in the early part of the year, at last rises in triumph into the midheaven of his glory, and bestows his life upon all creatures, ripen­ing the corn and the grape, ...

See also: Sun, Moon, Death, Degree, World