Karka — Cancer — is the heart of the zodiac. Where other signs lead with logic or drive, Karka leads with feeling. It’s ruled by Chandra (the Moon), it’s a water sign, and it runs on emotion, memory and the deep pull of home.
Quick note: Vedic astrology uses the sidereal zodiac, so the dates run later than the Western ones, and the Moon sign and rising sign matter more than the Sun. So treat this as the outline.
Karka at a glance
- Vedic name: Karka (the Crab)
- Sun-sign dates (sidereal): roughly July 15 – August 14
- Ruling planet: Chandra (the Moon)
- Element: Jala — Water
- Quality: Chara (movable) — a starter, led by mood
- Nakshatras it covers: Punarvasu (last quarter), Pushya, Ashlesha
- Gemstone: Pearl (Moti)
- Lucky day: Monday (Somvar)
- Lucky colour: White, silver
- Rules the body: Chest and stomach
What Karka is in the classical scheme
A rāśi is defined by three things before anything is said about character: its lord, its element and its modality. Karka is ruled by Chandra (the Moon), belongs to Jala, water, and is Chara (movable). Those three facts generate most of what the tradition goes on to say, and reading them together is more useful than reading a list of traits.
The Moon governs the mind’s receptivity and its changes; water takes the shape of what contains it; and a movable sign initiates. The tradition reads Karka as the sign of shelter and of holding — the crab carries its house — and derives both its protectiveness and its changeability from a lord that is never in the same phase twice.
The tradition also assigns each rāśi a region of the body — for this sign, chest and stomach — as part of a correspondence scheme used in classical medical astrology. That is a classificatory association within the system, not a medical statement, and nothing on this page should be read as health guidance.
Which planets are strong and weak in Karka
Karka’s planetary dignities are unusually eloquent, and they line up with everything described above.
Jupiter is exalted here, deepest at the fifth degree — almost the beginning of the sign. Brihaspati is the graha of blessing, expansion, counsel and the good faith that makes teaching possible.
Mars is debilitated here, lowest at the twenty-eighth degree — almost the end. Mangal is the graha of force, edge, confrontation and the willingness to cut.
The Moon owns it. Karka is Chandra’s only rashi, which is why the sign is read as the most personal of the twelve: the graha of feeling has exactly one home, and this is it.
So the rashi of the mother raises the teacher to his highest point and brings the soldier to his lowest. That is not a sentimental reading; it is what the scheme says. A sign built to reward nourishment and to penalise aggression will produce exactly the protectiveness the sections above describe, and exactly the documented difficulty with open confrontation.
The degrees add a detail worth noticing. Jupiter’s high point sits at the start of Karka and Mars’s low point near the finish, so the sign opens in blessing and closes where force is least effective. Anything in Karka that depends on pushing tends to run out of usefulness towards the end.
Karka’s opposite sign, Makara, reverses both dignities exactly — Mars exalted, Jupiter debilitated. The two rashis are a matched pair, and neither is complete without the other.
How classical readings apply it
Read as tendencies. Traditional readings associate Karka with attachment to home and lineage, a strong memory for how things felt, and care extended outward; the named difficulty is that the same sensitivity retains injuries as durably as affections. On work, the sign is conventionally linked with caring professions, hospitality and food, property, and any role built on continuity.
A Sun sign is the coarsest of the common indicators — the Moon’s nakshatra and the ascendant carry more weight, and this is especially so here, since the Moon is this rāśi’s own lord.
How compatibility is actually assessed
Sun-sign compatibility tables are a Western convention, and classical Jyotisha does not use them. Traditional matching — guṇa milan, also called aṣṭakūṭa — is calculated from each person’s Moon nakshatra rather than the Sun sign, and scores eight separate factors: varṇa, vaśya, tārā, yoni, graha maitrī, gaṇa, bhakūṭa and nāḍī. Two people of the same Sun sign can therefore score very differently, and a low score is treated as an indication to examine the charts more closely rather than as a verdict. The method is set out in Kundali Milan.
A few things people miss about Karka
- The hard shell exists because the inside is so soft.
- They give and give, then quietly resent not being looked after too.
- Make them feel safe and you’ll meet the warmest person in the zodiac.
Reading it in a whole chart
A rāśi is a thirty-degree division, and it is a coarser instrument than the nakshatra that sits inside it. In practice a Jyotiṣī reads the Moon’s nakshatra, the ascendant and the running daśā before saying anything about a sign, and the sign itself matters most as the seat of a graha rather than as a personality label. The finer divisions of this rāśi are Punarvasu · Pushya · Ashlesha, and the scheme they belong to is explained in How to Read a Nakshatra. For a reading of an actual chart, AdiVeda offers a personal Vedic birth-chart reading.
The nakshatras within this rashi
Texts for Chandra (the Moon)
Chandra (the Moon) rules this sign. AdiVeda publishes its texts in full — Devanagari, IAST transliteration and English.
- Chandra Mantras
- Chandra Ashtottara Shatanamavali — 108 names
- Navagraha Stotram — all nine grahas in one recitation
Where this material comes from
- Sign lords, exaltation, debilitation and moolatrikona
- Bṛhat Parāśara Horā Śāstra, with Varāhamihira's Bṛhat Jātaka giving the same scheme in verse. The degrees quoted — the Sun at the tenth degree of Meṣa, Saturn at the twentieth of Tulā, and the rest — are the classical values, and the seven grahas are the only ones the scheme assigns them to.
- Element, modality and sign order
- Standard across the classical Jyotiṣa literature and shared with the wider Hellenistic-influenced tradition.
- Which zodiac this is
- AdiVeda uses the sidereal zodiac, as Indian astrology does, not the tropical zodiac used in most Western astrology. The two currently differ by roughly twenty-four degrees, which is why the same birth date can give a different sign in each system.
- Rāhu and Ketu
- The classical dignity scheme assigns exaltation and debilitation to the seven grahas only. Later authors propose placements for Rāhu and Ketu and do not agree with one another, so none is asserted here.
Where a page describes personality or compatibility, that is interpretive tradition rather than a textual claim, and it varies between authors.
AdiVeda names the text a claim comes from, and says so when a familiar formulation is a modern or later rendering rather than a classical one. No chapter or verse is cited unless it is certain. How we source and verify.