Upagrahas in Vedic Astrology

Upagrahas (literally "near-planets") are shadow planets, called aprakasha grahas, the non-luminous ones. They have no physical body and cannot be seen; each is a sensitive point computed from the Sun's position or from the time of day.

They fall into two families:

• The five Dhoomadi upagrahas, derived purely from the Sun's longitude: Dhuma, Vyatipata, Parivesha, Indrachapa and Upaketu.
• The kalavelas, derived from dividing the day and night into eight parts: Gulika, Kala, Mrityu, Ardhaprahara and Yamaghantaka. Mandi belongs with this family in most listings.

The Brihat Parashara Hora Shastra calls them malefic by nature and causing affliction. They never decide a chart alone; they modify it, like a fine seasoning that changes the flavor of the main dish.

The Brihat Parashara Hora Shastra (chapter 3, verses 61-64) derives five shadow points from the Sun's longitude at the moment of birth. The chain is pure arithmetic:

Worked example. Suppose the Sun stands at 45°08' (Taurus 15°08'):

• Dhuma = 45°08' + 133°20' = 178°28'
• Vyatipata = 360° − 178°28' = 181°32'
• Parivesha = 181°32' + 180° = 361°32', i.e. 1°32'
• Indrachapa = 360° − 1°32' = 358°28'
• Upaketu = 358°28' + 16°40' = 375°08', i.e. 15°08'

The verse gives its own self-check: Upaketu + 30° (one sign) always returns the Sun's longitude. Here 15°08' + 30° = 45°08', the Sun we started with.

The same chapter of the Brihat Parashara Hora Shastra gives their core interpretive rule in one verse:

• If one of these five afflicts the Sun, the native's dynasty or lineage declines.
• If it afflicts the Moon, it destroys longevity.
• If it afflicts the lagna, it destroys wisdom.

In practice, astrologers check whether any of these points sits with or aspects the Sun, Moon or ascendant, and treat a close affliction as a mark against vitality, health or judgment. Parivesha is singled out as the most intensely malefic of the five.

The second family comes from time, not the Sun. The day from sunrise to sunset is divided into 8 equal parts, and the parts are counted in weekday order starting from the weekday lord. Each planet's part materializes as a shadow point, and the ascendant rising at the start of that part is its position:

• Gulika, from Saturn's part, the most malefic of all upagrahas.
• Kala, from the Sun's part.
• Mrityu, from Mars's part.
• Ardhaprahara (half-period), from Mercury's part.
• Yamaghantaka, from Jupiter's part, the benefic exception: classical texts call it the most benefic of the sub-planets, just as Gulika is the most malefic.

For a night birth the same division is made on the night, counting from the 5th planet from the weekday lord. Venus's part and the lordless 8th part yield no named point.

Mandi belongs to this family in most listings. South Indian tradition treats Mandi as another name for Gulika; classical texts compute it from fixed ghati tables per weekday. Our dedicated page covers it in depth.

Upagrahas are precision instruments, not headline planets. A working astrologer uses them to:

• Test vitality points: check the Dhoomadi five against the Sun, Moon and lagna for hidden weakness.
• Read Gulika's house: the single most-used upagraha judgment, especially for health and longevity.
• Time sensitive matters: Gulika Kalam and Yamagandam mark the day's segments to avoid or prefer.
• Rectify doubtful birth times: Gulika's computed position is one cross-check for the true lagna.

The golden rule from the texts: an upagraha modifies the house and planets it touches; it never overrules the lords, yogas and dashas that decide the chart.