Sagittarius Decan 2 (December 3 – December 12) — Mars Sub-Ruler

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Sagittarius decan 2: born December 3 – December 12, sub-ruled by Mars. Personality, love, and career themes for the 10°–19° Sagittarius placement.

♐ Sagittarius
Decan 2 of 3
December 3 – December 12
10°–19° Sagittarius
Sub-ruler: ♂ Mars

The second decan of Sagittarius is co-ruled by Mars, adding Aries drive and directness to Sagittarian vision. These individuals combine the fire of Jupiter's expansion with the action orientation of Mars — they are not just idealistic but aggressive in pursuit of their ideals.

Personality

Second-decan Sagittarius people are often the most decisive and action-oriented of the sign. Mars eliminates some of the philosophical meandering that can slow other Sagittarius decans and channels the expansive Jupiterian vision into concrete forward motion. The shadow side is righteousness — the combination of strong beliefs and willingness to fight for them.

Love & relationships

Romantically, this decan is passionate and direct. Partners experience both the enthusiasm of Sagittarius and the intensity of Mars — which can be exhilarating and exhausting in turns.

Career & purpose

Advocacy, entrepreneurship, athletics, military strategy, competitive fields of any kind, and work requiring both vision and forceful action suit this decan.

Key themes

Decisive vision
Aries influence
Actionable idealism
Passionate pursuit
Direct

The three decans of Sagittarius

Go deeper

See all 36 decans at the decan guide hub, or explore your Sagittarius daily horoscope, Sagittarius rising sign, and Sagittarius compatibility.

Real-world reference: Astrological decan on Wikipedia — for the general background concept this page applies to a specific sign or house.

FAQ

What is the second decan of Sagittarius?

The second decan of Sagittarius covers 10°–19° Sagittarius and applies to those born December 3 – December 12. Each zodiac sign is divided into three decans of 10 degrees each; the second decan is sub-ruled by Mars, which modifies how Sagittarius's core energy expresses.

What does Mars as a sub-ruler mean for Sagittarius decan 2?

Mars as the decan sub-ruler blends its archetypal qualities into the Sagittarius baseline. The result is a version of Sagittarius that carries both the sign's core nature and a secondary planetary influence — creating a more specific personality type than the sun sign alone describes.

How are decans calculated in astrology?

Each of the 12 zodiac signs spans 30 degrees of the ecliptic. Dividing those 30 degrees into three equal sections of 10 degrees each produces three decans per sign. The traditional Chaldean system assigns each decan a sub-ruler from the same element's sequence — so all fire-sign decans are sub-ruled by fire-sign planets (Mars, Sun, Jupiter in rotation for Aries, Leo, and Sagittarius).

Is my decan more important than my sun sign?

No — the sun sign is the primary placement. The decan adds specificity to it, describing a particular flavor of the sign's energy rather than overriding it. Think of it as a modifier: if your sun sign is the genre, your decan is the subgenre.

What is Sagittarius decan 2's relationship to Mars?

The sub-ruler Mars introduces its archetypal themes into the Sagittarius template — not as a second sun sign, but as a secondary influence that shapes how the sign's energy tends to express. Sagittarius decan 2 people will often resonate with some qualities of the sign Mars rules, without fully being that sign.