Combust Planets: What Combustion Means in Your Kundli

What does it mean for a planet to be 'combust' in Vedic astrology?

A planet is combust, or asta in Sanskrit, when it sits close enough to the Sun's own zodiacal degree that classical Jyotish reads its light as overwhelmed by the Sun's glare. Each graha has its own threshold, roughly 10 to 17 degrees depending on the planet, inside which its usual significations are read as muted rather than erased. It is a proximity check on one placement, not a verdict on the whole chart — the same planet can be combust in one person's chart and perfectly clear a few degrees away in another's.

Sources & fixed facts (not folklore)

The orbs most Parashari references and Jyotish software use are: Moon 12°, Jupiter 11°, Saturn 15°, Mercury 14° (12° when retrograde), Venus 10° (8° when retrograde), and Mars 17° — measured as the zodiacal longitude gap between the planet and the Sun, not physical distance in space. Only six grahas are ever checked for combustion: the Moon, Mars, Mercury, Jupiter, Venus and Saturn. Rahu and Ketu are the Moon's calculated nodes rather than physical bodies with their own light to lose, so combustion is never applied to them, and the Sun cannot combust itself, since it is the source of the glare being measured against.

Read enough of the yoga and dosha articles on this site — Gaja Kesari, the five Mahapurusha combinations, a strong graha for career — and you will keep running into the same aside: "provided the planet isn't combust." It gets used constantly and explained rarely, a piece of shared vocabulary every deeper reading quietly assumes you already have. This is the explanation those asides keep pointing toward.

The mechanism: why proximity to the Sun matters

The Sun is the brightest object in the sky by an enormous margin, and to the naked eye a planet sitting close to it becomes genuinely difficult to observe — lost in daytime glare, or rising and setting too near the Sun's own rising and setting to be seen cleanly. Classical Jyotish reads this physical difficulty symbolically: a graha that close to the Sun is treated as unable to give its results clearly, the way a quiet voice cannot be heard standing right beside a much louder one. The Sun is not read as an enemy here — Surya simply overwhelms whichever planet strays too near, regardless of whether that planet is naturally a friend or a foe to the Sun elsewhere in the chart.

The classical orb for each graha

How close counts as "too close" is not the same for every planet, and it tightens further for Mercury and Venus specifically when either is retrograde — a retrograde inferior planet sits nearer Earth and appears brighter, so tradition allows it less room before calling it combust:

• Moon — within 12° of the Sun.
• Mars — within 17°.
• Mercury — within 14° (12° when retrograde).
• Jupiter — within 11°.
• Venus — within 10° (8° when retrograde).
• Saturn — within 15°.

Only these six are ever checked. Rahu and Ketu are calculated points, not physical bodies with their own light, and the Sun — being the light every other orb is measured against — cannot combust itself.

A weakened planet, not a silenced one

It's worth being precise about what combustion actually claims, because casual reading tends to overstate it. A combust planet doesn't stop signifying what it signifies — a combust Jupiter still governs wisdom, teaching and expansion in that chart; a combust Venus still governs relationships and comfort. What combustion says is that the planet's ability to deliver those results cleanly is reduced, the same way Gaja Kesari Yoga stays technically formed but reads muted when the Jupiter forming it sits combust — the geometry and the dignity are both satisfied, and combustion is the third, independent check that softens the outcome anyway. A careful reading treats combustion as one more layer to weigh, never a single verdict that overrides everything else the chart shows.

The one well-known exception: Budha-Aditya Yoga

Mercury sitting with the Sun is the one combination classical Jyotish treats as genuinely two-sided rather than simply weakening. When Sun and Mercury share a sign, the combination is named Budha-Aditya Yoga and is read as sharpening intellect, communication and analytical clarity. Most classical treatments are specific, though, that the yoga's fuller benefit still depends on Mercury sitting outside its own roughly 14-degree combustion orb — a Mercury genuinely that close still loses some of the clean expression combustion generally implies, even while the conjunction itself is considered auspicious in kind. It is a useful reminder that a conjunction with the Sun and combustion by the Sun are related but separate checks: a chart can carry one without the full weight of the other.

Why this is worth checking, not just naming

Combustion shows up quietly across the readings this site already covers. It is the third check a strong graha in your chart needs, alongside dignity and house placement — a planet can be exalted and beautifully placed and still give softened results if it is also combust. It is also one of the traditional reasons certain windows close on the wedding calendar: the wedding muhurat calendar pauses whenever Jupiter or Venus, the two planets most associated with marriage and harmony, sit combust, alongside the longer Chaturmas closure — not superstition layered on the calendar, but the calendar itself, working exactly as the classical rule describes.

Astro Ratan checks combustion the same way it checks dignity and house placement — as one factor in a full reading of your exact chart, computed to the degree on the Swiss Ephemeris with the Lahiri ayanamsa, never guessed from a rounded table. You can begin free on WhatsApp: share your birth date, time and city, and simply ask which of your grahas are combust, and what that actually changes about your reading.