Zodiac, Ayanamsha and House Choices for Jyotish and KP

When building a Jyotish or KP setup in Hermes, record three separate choices: the zodiac, the exact ayanamsha option and the house system. Selecting Sidereal does not identify an ayanamsha, and choosing Lahiri does not determine how you divide the houses.

For a textbook’s sign-based house counting, Sidereal + Lahiri + Whole Sign can be a starting point. For a KP cusp comparison, start with Sidereal + Krishnamurti + Placidus. These are two study routes, rather than universal instructions for every Jyotish or KP practice. Identify what your chosen author uses each component to examine.

Why record rāśi and bhāva separately?

Rāśi means sign; bhāva means house in this discussion. A sign entry identifies a point’s position in the chosen zodiac. Its house entry depends on the house arrangement and reference. A sign can correspond to a complete house in a particular method without making the two concepts interchangeable in every method.

In Vedic Astrology: An Integrated Approach, §7.1, P. V. R. Narasimha Rao counts the reference’s sign as the first house and uses lagna, the Ascendant, when no reference is specified. Section 1.3.13 states the book’s Chitrapaksha/Lahiri choice. The relevant sections, pp.18 and 67. This citation concerns the method in a book first published in 2000, rather than every preference in the author’s later work.

Suppose the Ascendant is at 18° Leo and a planet at 1° Virgo in the same sidereal frame. In Whole Sign, Leo is the first place and Virgo the second. A different house division can put that planet in the first house without moving it out of Virgo.

The last distinction matters. The bhāva/chalit features of Rao’s own software list different divisions and a choice of placing the Ascendant at the start or middle separately. This illustrates why a convention needs to be specified; it does not establish the same controls in Hermes.

Is “Lahiri” or “KP” enough to reproduce a calculation?

The full catalogue of ayanamsha families and variants is in the Choosing an Ayanamsha guide; here we look only at the three options you will meet in Jyotish and KP work. Identify the technical definition as well as the family name. Hermes includes Lahiri (Chitrapaksha), other Lahiri variants and two separate Krishnamurti options.

Swiss Ephemeris §§2.8.5–2.8.6 distinguishes Lahiri variants and the Krishnamurti definitions based on a table and on the year 291. Calling both Krishnamurti options “KP” loses that distinction. VP291 should not become the assumed choice of every KP source either.

Keep the calculation date, exact option, ayanamsha value returned for that date and program version together. When comparing a published example, examine the ephemeris, reference conventions and rounding as well. A shared family name does not guarantee identical implementation details across programs.

Which degree are you reading in Whole Sign, Sripati and Placidus?

The Hermes menu contains Whole Sign W, Sripati / Hindu Bhava S and Placidus P separately. Working in a sidereal zodiac does not automatically choose one of them.

Whole Sign starts the first place at the beginning of the rising sign. In the Swiss Sripati definition used here, Porphyry reference degrees are calculated first, and the midpoints between neighbouring degrees become the new boundaries. Placidus uses a different semi-arc division. Technical definitions: Swiss Ephemeris §§6.2.1, 6.2.5 and 6.2.6.

To examine the boundaries, choose this teaching geometry within one zodiac frame: Ascendant 138°, Midheaven 42°. Let the twelfth, first and second Porphyry references be 106°, 138° and 166°. The Sripati boundaries are then:

• First cusp: (106 + 138) / 2 = 122° = 2° Leo.
• Second cusp: (138 + 166) / 2 = 152° = 2° Virgo.

The planet remains in Virgo in both columns. The Ascendant also remains at 138°, while the first Sripati boundary is 122°. Mistaking a reference degree for a starting boundary can lead you to read the wrong house. Do not equate a source’s house centre with another table’s cusp without checking their definitions.

These are not Hermes results for an actual date, and they do not establish the same Sripati convention for every bhāva/chalit method. Add your source’s definition of the listed degree to your notes.

Which sources support the choices in a KP study?

In the scan of K. S. Krishnamurti’s Horary Astrology: Krishnamurti Padhdhati — Advanced Stellar System, p.243 specifies his own ayanamsha; p.245 explicitly treats a house as extending from cusp to cusp. The first-edition page states 1970. These passages support recording the ayanamsha and house boundary separately. Source: K. S. Krishnamurti, Horary Astrology (KP Reader VI), pp.242–245.

For a contemporary application, KPAstrology.com’s own overview of KP specifies Placidus. The same site describes its SKP extension and states that it is unaffiliated with Krishnamurti’s successor institutions. The citation identifies that site’s account of its approach, rather than an official common standard for every KP branch.

You can therefore build a calculation comparison in Hermes with Sidereal + Krishnamurti (KP) + Placidus. If your source requires another Krishnamurti definition, select and document it separately. Choosing one ayanamsha and house system does not establish the entire KP analysis chain.

Preserve the context of the book passage too: it discusses a numbered horary example. Do not silently transfer its starting procedure into a natal or ordinary time-based chart. The exercise in this guide compares settings for a chart with a specified date and place.

Can five arcminutes change a sign or Whole Sign house?

Near a boundary, they can. For a conventional longitude shift, use sidereal longitude = normalize(tropical longitude − ayanamsha). Here normalize returns an angle from 0° inclusive to 360° exclusive. The A/B offsets below are not actual Lahiri or KP values.

Choose a tropical planetary longitude of 144°02′ and a tropical Ascendant of 162°00′:

The Ascendant remains in Leo while the planet crosses a sign boundary, changing the house count. Nothing jumps in the sky. A different zodiac origin labels a position near an edge differently. The same-sized difference need not change a sign when the point is farther from its boundary.

If you are studying a source that uses smaller divisions such as nakshatras or sub-lords, record the relevant division boundary too. Their presence in a method does not establish that this Hermes settings menu calculates them all. Nakshatra/sub-lord, daśā and varga capabilities each need their own calculation and product evidence; this guide makes no usage or results claim for them.

In which order should you compare settings in Hermes?

Use synthetic data: 20 March 2000, 12:00:00 UTC; 41° north, 29° east; Gregorian calendar. Retain Normal, Zodiac Longitude coordinates/view, Normal cusp setting and Normal zodiac transformation. Record your node choice and any additional points included in the study.

1. Start with Sidereal + Lahiri + W. Record each planet’s longitude, sign and house, alongside separate Ascendant/Midheaven entries.
2. Change only W to S. Examine the first two boundaries and points whose houses change while their signs remain the same.
3. Retain Lahiri and calculate P separately. This stage compares house systems.
4. Retain P and change the ayanamsha to Krishnamurti. Compared with the preceding P calculation, you are now varying the ayanamsha alone.
5. Test VP291 separately if relevant. Record its full name and value for the date. Do not collapse the two choices into one “KP result” cell.
6. Check the returned frame. Is the result actually sidereal? Does the record identify the ayanamsha name/value, house system used and any error or warning?

Actual degree outputs for these five calculation sets have not been produced here. In your observation table, identify the changed field in a separate column. Do not attribute the entire difference between the initial W/Lahiri and final P/Krishnamurti charts to the ayanamsha.

What should you save to reuse a setup?

Retain source and passage, study purpose, date–UTC–place, zodiac, exact ayanamsha name/value, house method, cusp and transformation choices, and program version. Keep sign, boundary and house-number results separate. If you are examining a nearby boundary, identify the calculation precision available to you alongside the rounded display value.

“Jyotish” or “KP” alone cannot replace those details. When using a personal settings slot, check which fields it saves and which belong in your study notes. For saving preferences versus changing new-chart defaults, see the Hermes Chart Settings guide.

The useful result of this exercise is a record that lets you reconstruct how the same data was read through a specific source, zodiac origin and house definition. Judging how well a method predicts life events would require a separate investigation.