Jupiter is considered one of the most auspicious planets in Vedic astrology. It represents wisdom, knowledge, spirituality, and good fortune. When placed in the 10th House for Cancer ascendant, Jupiter can bring about a lot of positive changes in the individual's career and social status.
However, in this placement, Jupiter is in an enemy sign state which makes it slightly weaker than usual. This means that its benefic effects may be reduced to some extent. Nevertheless, Jupiter's influence on this house can still be significant for those born under the Cancer ascendant.
Firstly, let us take a look at the houses that Jupiter is the lord of - 6th and 9th house. The presence of Jupiter in the 10th house can improve the natives' relationship with their colleagues and subordinates at work (6th house). They are likely to be more supportive towards you and may help you achieve success through their own efforts.
The 9th house represents religion, spirituality, higher education and long-distance travel. The position of this natural benefic planet can expand an individual's interest in these areas or lead to opportunities to travel abroad for pursuing higher studies or work assignments.
Further analysis reveals that Jupiter is also responsible for taking care of its own karaka houses - 2nd, 5th and 9th houses. Therefore when placed in your professional sector i.e., the 10th house it's bound to bring good fortune regarding income (2nd), creativity (5th), respect from peers (9th).
Moreover, as per Jaimini Sutra,
"Yearning/Desire" is often associated with Guru/ Brihaspati/Jupiter.
So this also means deep desires are activated by Guru corresponding to those areas where he aspects!
Lastly,Jupiter has directional strength when placed in Kendra(4) Houses.So Sookshma Maha-Dasha brings good results.
Jupiter's influence is not just limited to these houses but it also aspecting the 2nd, 4th and 6th house from its placement. This gives the individual a boost in personal matters such as family relationships, property investments (4th house), accumulated wealth and assets(2nd House) as well as competencies at work/career (6th House)
Overall, Jupiter's presence in the 10th house for Cancer ascendant individuals can be a great boon for their professional life. It has the potential to bring them wealth, respect, success and even opportunities for international travel or business venture expansion. Despite being in an enemy sign state Jupiter has enough power to succeed in its role which directly impacts professional career achievements and prosperity.
But remember astrology is an art of possibilities rather than fate - this prediction is based solely on one planet.Therefore other factors affecting this placement would still have astrological relevance in the native's birth-chart.The chart should be studied holistically by taking into account all aspects like dashes,current transits etcetera .