Special (time-based) lagnas
Bhava, Hora and Ghati lagnas - the special ascendants that advance from the Sun's sunrise position as the day unfolds.
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Alongside the rising-sign ascendant, Vedic astrology uses several time-based 'special lagnas' that begin at the Sun's position at sunrise and advance at fixed rates: the Bhava Lagna (one sign per five ghatikas), the Hora Lagna (one sign per 2.5 ghatikas) and the Ghati Lagna (one sign per ghatika). They add layers for the body, wealth and power respectively.
Sivayan computes them from your exact birth time and the sunrise of your birthday - so an accurate time of birth matters here.
What you get
Bhava Lagna
The body and overall life direction (1 sign / 5 ghatis).
Hora Lagna
Wealth and resources (1 sign / 2.5 ghatis).
Ghati Lagna
Power, status and authority (1 sign / ghati).
Sign & degree
Each special lagna's sidereal sign and degree.
Ghatis since sunrise
The elapsed time measure the lagnas are built on.
Sidereal & Lahiri
Computed on the Vedic sidereal zodiac.
Common questions
A special ascendant advancing one sign every 2.5 ghatikas (one hour) from the Sun's sunrise position - used especially for wealth analysis.
They advance continuously from sunrise, so even small time errors shift them; the Ghati Lagna moves a whole sign every 24 minutes.
A traditional time unit of 24 minutes; 2.5 ghatikas make one hour.
No - the rising sign (Lagna) is the ascending degree; these are separate time-based points that share the sunrise Sun as their origin.