According to its definition prevalent in Vedic astrology, when Jupiter is in Kendra from Moon which means when Jupiter is in house number 1, 4, 7 or 10 from Moon, Gaj Kesari Yog is said to be formed in the horoscope which can bless the native with great fame, great skills, success, wealth and many other things.
As we know that there are only 12 houses in a horoscope and Jupiter can be present in any one of these 12 houses, when we count from the house of placement of Moon, the presence of Jupiter in 4 out of 12 houses will lead to the formation of Gaj Kesari Yog in the horoscope which means that randomly, every third person is having Gaj Kesari Yog in his horoscope since there are only 12 houses in a horoscope and the probability of Jupiter being placed in any one of 4 specific house out of 12 houses is one third.
Analyzing this definition further, we know that Moon transits a sign for 2 and a half days approximately and since the formation of Gaj Kesari Yog is decided by the placement of Jupiter from Moon, a Gaj Kesari Yog once formed stays active for about 2 and a half days which means that all the people born all around the world during these 2 and a half days will have a Gaj Kesari Yog in their horoscopes.
To simplify this fact, let us assume that Jupiter is present in Aries at a time and as we know that Jupiter stays in a sign for about a year, so when Moon enters in any of the signs namely Aries, Cancer, Libra or Capricorn, a Gaj Kesari Yog will be formed as Jupiter will be in house 1, 10, 7 and 4 from Moon in these cases. Since Moon stays in a sign for 2 and a half days and Jupiter does not change its sign fast, it means that such Gaj Kesari Yog will be active continuously for 2 and a half days.
The fact that a Gaj Kesari Yog is found in almost every third horoscope and the fact that this Yog remains activated for about 2 and a half days are very hard to justify practically as the good results associated with Gaj Kesari Yog are not so common which can be found in every third horoscope and any one of a very good Yog in Vedic astrology does not remain activated continuously even for an hour, let alone a period of 2 and a half days. This means that there are more conditions for the formation of Gaj Kesari Yog in a horoscope than the one mentioned in prevalent definition of this yog and we will now discuss these conditions.
To start with, both Jupiter and Moon should be working benefic in the horoscope for the formation of a Gaj Kesari Yog in the horoscope and if anyone or both these planets are working malefic in a horoscope, Gaj Kesari Yog will not be formed in the horoscope and the malefic planet will afflict the benefic planet which will cause problems instead of benefits. For example, if Moon and Jupiter are present in the same house of a horoscope, Moon is banefic but Jupiter is malefic, Gaj Kesari Yog will not be formed in this case and this combination of malefic Jupiter with banefic Moon will bring problems which will revolve around the significances of Moon. The worst kind of combination can happen when both Moon and Jupiter are working malefic in a horoscope as in this case, both the planets will suffer from the malefic effect of the other planet and no Gaj Kesari Yog will be formed in the horoscope.
And even when Gaj Kesari Yog is actually formed in the horoscope, its results will not be the same for different natives and they will change considerably according to the horoscopes of these natives. For example, Gaj Kesari Yog formed due to the presence of a benefic Jupiter and Moon in Cancer sign is generally much stronger than Gaj Kesari Yog formed due to the presence of a benefic Jupiter and Moon in Scorpio or Capricorn as Moon and Jupiter respectively are debilitated in Scorpio and Capricorn and hence they can’t contribute much towards this yog. On there hand, Jupiter is exalted in Cancer and Moon is in its own sign when placed in Cancer due to which, this yog gains much more strength as compared to the other combinations discussed.
Similarly Gaj Kesari Yog formed due to presence of benefic Jupiter and Moon in the same house is likely to be stronger than the Gaj Kesari Yog formed due to presence of benefic Jupiter in 7th house from Moon which is in turn stronger than the one formed with benefic Jupiter in 4th house from Moon which is stronger than the Gaj Kesari Yog formed with Jupiter in 10th house from Moon. The impact of other positive and negative planets on Jupiter, Moon and Gaj Kesari Yog itself should also be analyzed as this impact can considerably increase or decrease the strength of this yog.
The placement of Jupiter and Moon in different signs and different houses of a horoscope can also make a great difference in net resultant of Gaj Kesari Yog and the overall tone of the horoscope should also be checked properly before predicting the good effects of Gaj Kesari Yog in a horoscope. For example, Gaj Kesari Yog formed due to presence of benefic Jupiter and Moon in 10th house of a horoscope can be much easy for a native to handle compared to the one formed due to presence of benefic Jupiter and Moon in 8th house of a horoscope.
This is because, the energy of 8th house is difficult to handle and accordingly, not everyone can get the maxium benefits from this energy. On the other hand, some natives having such Gaj Kesari Yog in 8th house of their horoscopes may find it difficult to handle and channelize the energy given by this yog due to which they may face more difficulties than easy things. For such Gaj Kesari Yog to give very good benefits to the native, the overall horoscope should be strong and favorable as otherwise, the native may not be able to get much or anything at all from this benefic yog.
For example, such Gaj Kesari Yog formed in 8th house of a horoscope can bless the native with high class spiritual and paranormal development but that is only possible if the overall horoscope of the native is strong enough to handle and channelize this energy. If the overall horoscope is weak, the native may keep feeling troubled by this energy intead of getting any benefits through it. This happens because the Gaj Kesari Yog present in 8th house of his horoscope brings strong spiritual and paranormal energy to the native but the native being an overall weak personality due to having a weak horoscope, is not able to channelize this energy and instead he finds this energy difficult to handle due to which he feels troubled.
On the other hand, if the native has a strong horoscope which means that the Ascendant as well as the lord of Ascendant are strong and there are some other strong and benefic planets to provide more strength to the horoscope, the native will comfortable handle and channelize this energy and accordingly he will witness great progress in the spiritual and paranormal spheres. You see, though an equally strong and benefic Gaj Kesari Yog is present in two different horoscopes in the same house, the results are different depending on the overall horoscope.
Compared to the eighth house, the tenth house of the horoscope is a much easier house to handle and accordingly, most natives having Gaj Kesari Yog in tenth house of their horoscopes are able to get benefits through this yog though such benefits may once again differ in quantum depending on the overall strength and nature of horoscope of the native in question. For example, the lord of tenth house may be debiliteated in one horoscope and it may be exalted in another horoscope and this one difference alone can change the results given by Gaj Kesari Yog to a great extent.
Hence the overall results for a Gaj Kesari Yog, even when it actually forms in a horoscope, depend on many factors present in that horoscope and accordingly, such results should be predicted only after carefully analyzing all the important factors present in that horoscope.