Combustion of a planet takes place when a planet is very close to the sun. Or if the planet is at certain degree of closeness to sun. Combustion means “burning”, so when a planet is close to sun, the sun due to its excessive heat may burn or impact the qualities of a planet which is very close to it. Combust planet in astrology in hindi is referred as “ast graha.” A combust planet is generally denoted by (c) sign. For example if mercury is combust, it is denoted by mercury(c)
What are the degrees of closeness of each planet to sun to be combust?
As per ancient shastra
Below are the details of the degrees of closeness of each planet to sun, in those degree a planet can be termed as combust.
Moon: Moon becomes combust when it comes within 10 degrees on either side of the Sun. A combust moon can lead to depression, anxiety, damaged relation with parents especially in ascendant, second house, dustana house.
Mercury: Mercury becomes combust when it comes within 14 degrees on either side of the Sun provided Mercury is in forward Motion. When Mercury is in retrograde motion, the degree of closeness for combustion of Mercury becomes 12 degrees. It can also lead to slow intelligence.
Venus: Venus becomes combust when it comes within 8 degrees on either side of the Sun provided Venus is in forward motion. When Venus is in retrograde motion, the degree of closeness for combustion of Venus becomes 8 degrees. A combust Venus can cause problem in relationship or damaged marriage.
Mars: Mars becomes combust when it comes within 17 degrees on either side of the Sun. A combust mars can lead to loosing motivation in life.
Jupiter: Jupiter becomes combust when it comes within 11 degrees on either side of the Sun. A combust Jupiter can give hardship in life.
Saturn: Saturn becomes combust when it comes within 15 degrees on either side of the Sun. A combust Saturn can cause lot of problem in career and joint problem.
As per my study: It is my opinion that planet shows the qualities of being combust only when it is 6.2 degree closer to the sun. The more close it is the more combust it is.
What happen to an exalted combust planet?
If exalted combust planet gets maximum point in shaad bal, Vimshopak Bal, directional strength, then the combustion can be mitigated. Such Exalted combust planet always will deliver result if one is going through the dasha of the planet. For exalted moon and Venus, the exalted planet will always have an upper hand and it will try its best to give result. At the same time we also need to see the dignity of sun, the sign in which it is placed. Sun in a comfortable sign will try to give positive result with friendly exalted combust planet like moon, mercury, mars. At the same time sun in bad dignity can afflict the qualities of exalted combust planet.
Lastly even a combust exalted planet will give result as everything is addition in astrology.