The Pañca-Mahāpuruṣa ('five great-person') yogas are among the most studied yoga-groups in jyotiṣa. Each of the five non-luminary planets (Maṅgala, Budha, Bṛhaspati, Śukra, Śani) generates a yoga when it sits in its own rāśi or in its exaltation rāśi AND that rāśi happens to be a kendra (1st, 4th, 7th, or 10th from the lagna). The yoga is named after the graha: Rucaka for Mars, Bhadra for Mercury, Haṃsa for Jupiter, Mālavya for Venus, Śaśa for Saturn.
Maṇṭreśvara's key opening verse — kendre svocchasthe kuje rucako yogaḥ — establishes the pattern. Each graha brings its own characteristic effects when it forms its own mahāpuruṣa yoga; Rucaka classically indicates physical strength and warrior-temperament, Bhadra eloquence and intellect, Haṃsa wisdom and authority, Mālavya beauty and grace, Śaśa endurance and detachment. These are interpretive frameworks the Jyotiṣī uses, not deterministic predictions.