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
- 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, dignity, 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.
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. Traditional doctrine and caveats for major stars (e.g. Regulus, Algol, Antares) are tagged as ecliptic longitude readings. We do not claim Brady-style 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. |
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.
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 (progressions, profections, solar return, eclipses, and upcoming transit texture). 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). Deep consultation writes denser dossier prose. The calculation method does not change by channel.
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 apps for deep natal reports.
Recommended
- Psychological Astrology — Jungian guide to the natal chart
- Fixed star placements — history, insight, and rarity
- How to read your natal chart
- Natal Blueprint vs traditional reports and human astrologers
FAQ
Common questions
What calculation engine does Natal Blueprint use?
Natal Blueprint uses Swiss Ephemeris–class astronomical data for planetary positions, house cusps, and fixed-star longitude conjunctions. Sky positions, orbs, and ages come from that engine — not from improvisation.
Which fixed-star method do you use?
We use Diana K. Rosenberg–style zodiacal longitude conjunctions: tight ecliptic contacts between fixed stars and natal planets or angles. Foreground emphasis is typically at 1° or tighter; wider contacts stay in the engine inventory. We do not claim Brady-style parans.
Do reports and Mara use the same methodology?
Yes. Natal Lite, Natal Heavy, and Mara (browser and Telegram Deep) share the same engine fact sheet and the same labeled school blocks. Deep consultation weaves denser prose; it does not invent a second calculation method.
Do you only look at the birth chart?
No. Birth data is the foundation, and we also run current and future sky calculations across reports and the consultation interface — transits, progressions, and related timing layers from the same engine. In consultation, each successful sky sighting is archived so you can review or email it from your member account.
Do you use midpoints?
Yes. We calculate a curated cosmobiological shortlist oriented by Reinhold Ebertin’s Combination of Stellar Influences tradition (for example Sun/Moon, Venus/Mars, Asc/MC). Those pairs are computed with the rest of the chart and woven as supporting synthesis — clarifying or sharpening themes the luminaries, angles, and major aspects already carry. Orienting influence only: we do not lead with a midpoint catalogue, reproduce the full COSI encyclopaedia, or run a Uranian / Lang–Wescott dial tree.