A rare change of position by Jupiter, which stargazers say happens once in 30 years, is likely to have a mixed astrological effect on India.

With Jupiter changing its position and entering a new zodiac sign — from Capricorn to Aquarius — astrologers predict good times for Indian economy, but also warn against political turbulence in the days ahead. If astrologers are to be believed, the new government formed after May 16, would not last for more than one-and-a-half years and there are strong indications for another general election in late 2010 or early 2011.

Usually, Jupiter moves from one zodiac to another after 13 months, but this time it changed places within five months and is likely to go back to its previous sign, Capricorn, after two months. ‘‘Jupiter is a very strong planet, but its effect is weak when it is in Capricorn. But it has good long term results when it is in Aquarius. But the planet will retrograde after two-and-a-half months and go back to Capricorn. This means, the government formed after May 16 will start facing trouble from August onwards. It will result in re-election,’’ says Mukesh Jain, a Delhi-based astrologer.

With no party getting a clear margin, some astrologers foresee a new front forming the government and say that Indians should get ready to see the rise of a ‘‘dark horse’’ as the prime ministerial candidate. ‘‘No party will be able to form a government. I see a third front form a government with either Congress or BJP’s support and a dark horse from the eastern part of India becoming the prime minister,’’ said Shri Ashok Vasudev, a jyotishacharya with Astromatic Publication.

According to astrologers, neither Manmohan Singh nor L K Advani have the ‘‘raj yog’’ to become the PM in the next government. ‘‘Singh’s sade satti (seven-and-a-half cycle of Saturn) will end on September 10 this year. He is one of the few people who prosper during sade satti’s period. With this one being the last, he has enjoyed three sade sattis. He doesn’t stand a chance of being the PM again. As for Advani, he doesn’t have a strong horoscope and can never be PM,’’ says Vasudev.

Some politicians are destined to play a crucial role in the days to come. ‘‘Pranab Mukherjee will play a decisive role in the future. The year 2012 will see the rise of Gujarat chief minister Narendra Modi,’’ says Naveen Khanna, a political astrologer