Quick Answer
Combustion (Asta) Dosha means a planet sits so close to the Sun that its light is swallowed — astangata, or "combust". The planet is dimmed outwardly, so the confidence and visible expression of what it rules can feel muted or absorbed by the ego and the father-and-authority Sun. It is real but routinely overstated: the orb differs by planet, a combust planet still functions inwardly, and Mercury and Venus combustion is so common and mild that most charts carry it harmlessly. Degrees and the rest of the chart decide, so measure before you worry.
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What is Combustion (Asta) Dosha?
Combustion — asta in Sanskrit, meaning "set" like a setting star — is the condition of a planet burned by proximity to the Sun. Get close enough and, just as a star vanishes in daylight, the planet loses its heliacal visibility and, the classics say, some of its outward power. Astangata graha is the technical term. Because the Sun is ego, authority and the father, a combust planet often has its matters pulled into the Sun's orbit: the person may express that planet through their own identity or their father's influence rather than freely. People read "combust" and assume the planet is dead. It is not. In the charts I see, combustion tends to internalise a planet more than destroy it — the function goes quiet on the surface and intense underneath. Mercury, which never strays far from the Sun, is combust in a huge share of charts and those people are perfectly articulate. Context is everything.
How Combustion (Asta) Dosha forms in the birth chart
Combustion is measured by the planet's distance from the Sun in longitude, and — importantly — the orb is not the same for every planet. Common classical figures give the widest orbs to the slower or dimmer bodies: Moon combust within about 12°, Mars within 17°, Mercury within 14° (about 12° when retrograde), Jupiter within 11°, Venus within 10° (about 8° when retrograde), and Saturn within 15°. Within the outer combustion band lies a tighter "cazimi" heart-of-the-Sun zone (within roughly 1°) that some traditions read as a burst of strength rather than a burn. Retrograde planets take a narrower orb because they are moving toward the Sun differently. The Sun itself is never combust. Always check the exact longitudinal gap and the planet's motion before declaring asta; a planet at 11° from the Sun is combust if it is Mars but not if it is Jupiter.
Effects of Combustion (Asta) Dosha
A combust planet tends to express quietly, privately, or through the lens of the self and the father rather than out loud. Combust Mercury can make a thinker who processes internally before speaking; combust Venus can make love and comfort feel personal and understated rather than performative; combust Mars can turn drive inward as willpower or, if afflicted, as suppressed frustration; combust Jupiter can make wisdom feel bound up with personal identity or paternal belief. The house and the planet decide the arena — a combust 7th-lord touches partnership visibility, a combust 10th planet touches public recognition. There is an upside worth naming: proximity to the Sun can lend intensity, focus and a strong personal stamp to the planet's work. Combustion rarely erases a significance; it recolours it toward the introverted and the ego-linked. Balanced reading beats alarm here.
How serious is it? Cancellation & exceptions
Combustion is one of the most over-diagnosed conditions in astrology, largely because Mercury and Venus are combust so often — they orbit close to the Sun and simply cannot travel far from it, so a large fraction of humanity carries a combust Mercury or Venus and lives entirely ordinary, capable lives. That alone should calm the fear. Severity scales with tightness: a planet a degree or two from the Sun feels it more than one near the edge of the orb, and the cazimi core (within about 1°) is often read as strengthening, not weakening. A combust planet that is otherwise dignified — in its own or exaltation sign, or well aspected — withstands the burn. Retrograde combust planets are frequently gentler. And combustion eases in the dashas and transits when the planet separates from the Sun. Treat it as a dimming to work around, most often a mild one, not a cancellation of the planet.
Remedies for Combustion (Asta) Dosha
Because the Sun is the burning agent, remedies begin with a healthy, honoured Sun — Sunday observance, Surya Namaskar, offering water (arghya) to the rising sun, and a respectful relationship with the father and legitimate authority ease the ego-pressure the planet feels. Then support the combust planet through its own significations: its weekday, its beej mantra, and charity aligned with it (for combust Mercury, gifts that support students and communication; for combust Venus, kindness in relationships and care for comfort and the arts). Cultivating the planet's quality consciously, so it is not left mute, is a practical everyday remedy. Devotion to the planet's deity and to Surya together fits the picture well. Skip any assumption about gemstones — a stone can over-fuel a combust planet unhelpfully, so leave that to full-chart analysis by a qualified astrologer.
Remedies are traditional and general — never a substitute for professional advice. No gemstone or ritual should be undertaken on the strength of a single combination; analyse the whole birth chart with a qualified astrologer first, and consult appropriate professionals for medical, legal or financial matters.
Key Takeaways
- Combustion (Asta) Dosha = a planet too close to the Sun in longitude, its light "set" (astangata).
- The orb differs by planet — e.g. Mars ~17°, Saturn ~15°, Mercury ~14°, Venus ~10°, Jupiter ~11°.
- It dims a planet outwardly and pulls its matters toward the ego and the father, but rarely erases them.
- Mercury and Venus combustion is very common and usually mild — not a cause for alarm.
- The cazimi core (within ~1° of the Sun) can strengthen a planet rather than burn it.
Combustion (Asta) Dosha — Frequently Asked Questions
What is Combustion (Asta) Dosha?
It is when a planet sits so close to the Sun that its light is overpowered — called astangata, or combust. The planet is dimmed in its outward expression, so the confidence of what it rules can feel muted or absorbed into the ego. It is common and usually mild rather than severe.
Is a combust planet completely useless?
No. Combustion tends to internalise a planet, not destroy it — the function goes quiet on the surface and can be intense underneath. Many capable, articulate people have a combust Mercury or Venus. A dignified or cazimi planet can even work strongly despite the closeness.
How close to the Sun does a planet need to be to combust?
It varies by planet. Common orbs are about 12° for the Moon, 17° for Mars, 14° for Mercury, 11° for Jupiter, 10° for Venus and 15° for Saturn, with narrower orbs when retrograde. Always measure the exact longitudinal gap before declaring combustion.
Why is Mercury combustion so common?
Mercury never strays more than about 28° from the Sun, so it frequently falls inside the combustion orb. That is why a large share of charts carry a combust Mercury, and those people speak and think perfectly well. It is a reason to stay calm, not worried.
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