People · sourced chart
Humphry Davy
Chemist and photographer · United Kingdom · 1778–1829
Birth date sourced. Birth time unknown.The Moon remained in Sagittarius throughout that civil day. Everything below uses only what the complete civil day settles.
The day, read honestly
0.4° separates Mars and Uranus from an exact trine; at that range drive and disruption read as one mechanism. A trine runs downhill — the talent that never announces itself because it never had to.
Positions at 12:00 civil time in Penzance—a reference instant, not a birth time. No houses, rising sign, angles, or sect were computed.
Where the Sun actually stood
The Sun's position resolves to 25.8° Sagittarius — deep enough in the third decan (20°–30°) that the Sun, its traditional sub-ruler, colours the reading.
The fast planets
Day to day the chart speaks through Mercury in Capricorn (10.7°), Venus in Capricorn (24.5°), Mars in Libra (16.9°): thought with its feet on the ground, attraction that grows by reliability, effort aimed through strategy and words.
The angles that hold
The tightest geometry in the chart puts Mars a third of the circle apart from Uranus, 0.4° off exact. A trine runs downhill — the talent that never announces itself because it never had to. Behind it, the Sun square Jupiter at 0.5°, and Neptune trine Pluto at 1.0° — both still well inside the orbs this site uses. All of it stands whatever the hour was: each angle was tested from midnight to midnight before it was written down.
What the angles build
The Moon makes no major aspect that survives the day; the old reading gives such a planet autonomy — it acts alone, sometimes loudly.
The classical map
The dignity table, which predates the outer planets and only ever spoke for seven, marks two placements here. Mars in Libra at 16.9° is in detriment — the planet opposite its home, working against the grain; Jupiter in Virgo at 26.2° is in detriment. The table describes circumstance rather than quality — a planet in detriment is inconvenienced, not diminished.
The shape of the whole
Of the 10 placements whose signs hold for the whole day: 4 in air, 3 in earth, 2 in fire, 1 in water by element, 4 mutable, 4 cardinal, 2 fixed by modality. Air runs on comparison and connection — the pattern noticed first, the feeling filed second. Uranus was retrograde. Venus changed direction during the day, so its motion is left open.
The Moon, and how far it can move
The Moon stayed in Sagittarius for the whole of that day at the birthplace, covering 11.8° between midnight and midnight. Fast enough that its degree is approximate, slow enough that its sign is not in doubt. At the noon reference it stands at 10.5°.
Where this comes fromSources, revisions, and exactly what this chart assumes
- Source article
- Humphry Davy · revision 1361089655
- Wikidata
- Q131761 · revision 2520781954
- Retrieved
- 2026-07-26T18:47:50.947Z
- Birth date
- 1778-12-17 · day precision · proleptic-gregorian
- Birthplace
- Penzance, United Kingdom · Q208209
- Coordinates
- 50.1214, -5.5369 · from Penzance
- Reference instant
- 1778-12-17T12:01:15.000Z · noon civil time, not a birth time
- Omitted
- Rising sign, houses, angles, and sect—all require a birth time.
- Unknown-time range
- Moon travelled 11.83° · The Moon remained in Sagittarius throughout that civil day.
- Engine
- astronomy-engine (repository dependency) · @zodiacs/engine/internal/math
- Portrait
- Thomas Phillips · public domain · Wikimedia Commons
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