Natal Blueprint reads a birth chart with Swiss Ephemeris–class positions and labeled selective techniques — not a silent mash-up of every school that ever named a star. Interpretation is AI synthesis under astrologer-designed rules, grounded in engine-backed placements, orbs, and ages.
For the canonical public methodology document — how to cite us, method layers, named-schools honesty map, interpretation policy, and what we never invent — see Our method. This article is the technique companion: orb and school-table detail plus midpoints in plain terms.
Table of Contents
- Engine precision
- Voice lineage
- Factor schools in production
- Midpoints in plain terms
- Living sky — birth chart plus current and future
- Field, not verdict
- Progressions in plain terms
- Same method on every channel
- How to verify a provider
Engine precision
Positions come from Swiss Ephemeris–class astronomical data, including planets, house cusps, and fixed-star longitude conjunctions against the natal chart. The free chart and paid reports share that calculation bar. Mara consults the same enriched natal fact sheet and, when a question needs it, dated transit-to-natal sky — still engine-backed, never improvised.
Birth time accuracy still matters more than ephemeris polish: wrong time shifts houses and angles, which reshapes the whole reading.
Voice lineage
The interpretive voice is a psychological + evolutionary hybrid with traditional care for condition (sect, essential dignity, reception named as reception, aspect quality) — oriented by teachers such as Liz Greene (psychological), Robert Hand (traditional rigour), and Jeff Green (evolutionary), as influences on how we synthesise, not as celebrity endorsements or claims that we reproduce any one author’s complete system.
Meaning leads; mechanics support. Reports and Mara are written so you understand your life, not so you memorise an ephemeris dump. Planetary condition names sect, essential dignity, and reception as reception — not as dignity.
Factor schools in production
Selective factors keep a full engine inventory (we do not silent-drop real contacts). Foreground emphasis is ranked in code and labeled in the prompt so the model knows which school it is using. The core chart comes first: Western tropical planets in Placidus houses, major aspects, chart ruler / dispositors, sect and dignity — synthesised with orienting influences Liz Greene (psychological), Robert Hand (traditional rigour), and Jeff Green (evolutionary). See Methods we use on Our method for the full core-then-selective account.
| School / practice | What we compute | How we use it |
|---|---|---|
| Rosenberg (longitude) | Fixed-star conjunctions by ecliptic longitude | Orienting influence: Diana K. Rosenberg’s tight-longitude fixed-star practice. Full inventory; foreground typically ≤1° (prefer ≤0.5° as signature); weight lights, angles, and personal planets. First use names a zodiacal overlay; doctrine is a rhyme, not a welded governor. Polaris is projected ecliptic longitude, not the living pole. Traditional caveats for major stars (e.g. Regulus, Algol, Antares) are tagged as ecliptic longitude readings. We say exact only under 1.0°. Brady natal parans are a separate school, gated by a 10-minute clock attest — see local parans. |
| Goddess asteroids (George) | Ceres, Pallas, Juno, Vesta (plus Chiron and Mean Black Moon Lilith) | Orienting influence: Demetra George’s goddess quartet as archetypal voices. Included in the chart dump and woven where they add specificity the personal planets do not already carry — not a claim that we teach her complete asteroid curriculum. |
| Key midpoints (Ebertin) | Curated cosmobiological pairs from engine longitudes (e.g. Sun/Moon, Venus/Mars, Asc/MC) | Orienting influence: Reinhold Ebertin’s cosmobiological midpoint practice (Combination of Stellar Influences). A short list of high-value pairs is calculated with the chart and woven as supporting synthesis — clarifying or sharpening themes already present in the luminaries, angles, and major aspects. Midpoints do not open the reading; we do not run a full Uranian / Lang–Wescott dial tree or claim the entire COSI encyclopaedia. |
| Declinations, antiscia, lots | Where the engine returns them | Parallels / out-of-bounds and antiscia as emphasis or hidden-conjunction texture; Fortune, Spirit, and focus-linked lots in the Hellenistic / medieval lots tradition. Used to reinforce themes already active — not as a second lead. Planetary condition (sect, dignity) oriented by Robert Hand’s traditional-rigour lineage. |
| Brady (natal parans) | Star and planet simultaneously angular at the birth place (co-rising, co-culminating, co-setting, IC) | Orienting influence: Bernadette Brady’s diurnal paran method. Calculated only when you attest the birth clock within 10 minutes and entered a real time. 4-minute diurnal orb. Overlays remain labeled texture. We do not claim astrocartography paran maps. See local parans. |
| Jim Lewis (Astro*Carto*Graphy) | Planetary AC/MC/DC/IC lines and power-zone crossings | Orienting influence: Jim Lewis’s planetary-line geography. Orb typically about 2° of longitude of a line — roughly 150–200 km / ~100–125 miles at mid-latitudes; closer is stronger. Lines colour places; they do not pick a city. Lewis latitude crossings are not Brady fixed-star parans. Dedicated Earth chapter is parked in paid reports by default (technique retained, not deleted). Mara on-ask only. Not a checkout SKU. |
Midpoints in plain terms: A midpoint is the exact halfway degree between two chart points. Cosmobiology — especially Reinhold Ebertin’s Combination of Stellar Influences tradition — treats that degree as a meeting place of the two meanings. Our engine calculates a curated set of those pairs with the rest of your chart; our interpretation rules decide when to weave them into prose as supporting synthesis. You do not choose or toggle midpoints — calculation and selection sit with us and the data stack. They refine the story the main planets already tell; they are not a second lead technique.
Living sky — birth chart plus current and future
The birth chart is the foundation — and it is not the only sky we calculate. Across rich astrological reports and the consultation interface, Natal Blueprint also runs current and future sky against your natal placements: transit-to-natal aspects, progressions, solar return, and related timing layers from the same Swiss Ephemeris–class stack.
Field, not verdict: Timing is a window, not a scheduled event. Natal Heavy’s Next Chapter names one through-line, then each live window as the nature of the time, two or three expressions that share that tone, and a question left unanswered. Behaviour circuits keep Old / New / replacement / tells and name when the old move is still the right tool. Element counts name the Sun-through-Pluto bodies; named aspect types match the engine list. See field, not verdict on Our method.
Progressions in plain terms: Secondary progressions advance the natal chart by a day for each year of life — a symbolic timing method refined in early modern astrology and widely taught by Alan Leo, then reframed for psychological growth by Dane Rudhyar. Where transits show outer weather, progressions map who you are becoming. We calculate them from the same Swiss Ephemeris–class engine and use them both in Natal Heavy’s Next Chapter section and in our Consultation Interface with Mara.
- Reports — Natal Heavy weaves timing into the Next Chapter as windows on one through-line (progressions, profections, solar return, eclipses, and upcoming transit texture), then behaviour circuits as attractors. Every date and aspect still comes from the engine.
- Consultation interface — when you ask Mara a question in the browser or on Telegram Deep, she sights dated transit-to-natal sky for that ask (today by default, or a date your question makes clear). Progressions and solar return can be recomputed for that same date so timing language stays grounded. Consultation replaces standalone transit or daily PDF order forms for forecast-style questions.
- Archived evidence in your account — each successful consultation sky sighting is saved as a sky archive. From your member account you can list those sightings and email the full engine snapshot — proof of the sky Mara actually used, not a paraphrase.
Same method on every channel
Natal Lite, Natal Heavy, and Mara (browser and Telegram Deep) share the same engine fact sheet and the same labeled school blocks. Heavy adds timing layers (progressions, profections, solar return, eclipses) written as field-plus-choice windows. Deep consultation writes denser dossier prose. The calculation method does not change by channel. Astrocartography: dedicated Earth is parked in paid reports by default; Mara is on-ask only — planetary lines are not standing pin texture. Finished paid reports are scanned against that ledger and rewritten when mechanics contradict it (up to three attempts); Mara uses the same monitor as an alert-only check — see data integrity on Our method.
How to verify a provider
When you compare astrology apps and report services, ask for a methodology page that names calculation, not only marketing adjectives. Prefer providers who publish orb policy and which selective techniques they use. This page is Natal Blueprint’s answer to that test — see also our buying checklist in best astrology reports for 2026.