Blueprint Ephemeris

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Screenshot of Blueprint Ephemeris indicator

Blueprint Ephemeris is a complete planetary ephemeris indicator that computes real-time astronomical positions for all 10 solar system bodies directly inside TrendSpider — no external data feeds or APIs required.

OVERVIEW

Computes geocentric and heliocentric coordinates for the Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto, plus North and South lunar nodes (mean or true).

Bodies: ☉ Sun · ☽ Moon · ☿ Mercury · ♀ Venus · ♂ Mars · ♃ Jupiter · ♄ Saturn · ⛢ Uranus · ♆ Neptune · ♇ Pluto · ☊ North Node · ☋ South Node

Theories:

VSOP87D — Mercury through Neptune (Bretagnon & Francou, 1988)

ELP2000-82 — Moon (Chapront-Touzé & Chapront, 1983; Meeus truncation)

Meeus Series — Pluto (Meeus, "Astronomical Algorithms", 1998)

Accuracy (validated against JPL DE440 via Skyfield, 2000–2050):

Sun 0.004° · Mercury–Neptune 0.005°–0.017° · Moon 0.062° · Pluto 0.059°

All bodies under 0.1° RMS.

DISPLAY MODES (19)

Per-Planet: Longitude, Speed, Declination, Latitude, Right Ascension, Helio Declination, Helio Radius, Geo Distance, Angular Size, Elongation, Signed Elongation, Phase Angle, Illuminated Fraction

Pair: Aspect Angle, Midpoint, Synodic Phase, Speed Diff

Aggregate: Avg 6 Planets, Avg 8 Planets

FEATURES

• Geocentric/heliocentric toggle (Sun and Moon always geocentric)

• Individual on/off toggle per planet — all enabled by default except Moon and nodes

• Two-body pair modes with dedicated planet dropdowns

• Aggregate average longitude (6 or 8 planets)

• Reference lines at 30° intervals (zodiac boundaries or aspect degrees)

• Future projections up to 100 bars ahead

• Mean or true lunar node selection

HOW TO USE

Load the indicator to see all planets in longitude mode. Toggle bodies on/off, switch display modes, or select a Pair/Avg mode. Enable Reference Lines for zodiac or aspect markers. Set Projection Bars to extend lines into the future.

THEORY & REFERENCES

All positions computed from first principles — no external ephemeris services. Truncated analytical series implemented directly in JavaScript.

Meeus, Jean. "Astronomical Algorithms" (2nd Ed., 1998)

Bretagnon & Francou. "Planetary Theories in rectangular and spherical variables. VSOP87 Solutions" (Astronomy & Astrophysics, 1988)

Chapront-Touzé & Chapront. "ELP2000-82" (1983)

Miller, Greg. github.com/gmiller123456/vsop87-multilang (validation reference)

Author: BlueprintResearch (Javonnii)

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