Dashas (planetary periods)
Pratyantardasha in Vedic astrology
Updated
Pratyantardasha: how the API computes it
A pratyantardasha is the third level of a Vimshottari dasha. It is a part of an antardasha, the sub-period inside a main period. The API builds each level the same way (DA-04).
A period is split into nine parts. They run in the usual order, starting with the planet that rules the period. Each part lasts the parent period's length times that planet's years, divided by 120.
Take John Doe. He is in a Jupiter mahadasha (main period) of 16 years, from Dec 20, 2014 to Dec 20, 2030. His Jupiter antardasha lasts 16 times 16 divided by 120, which is about 2.13 years.
Inside that, the Jupiter pratyantardasha lasts about 0.28 years, roughly 104 days. These periods are short. So they are mainly used to time events in the near future.
POST /v1/dasha/vimshottari returns three levels by default. So pratyantardashas come back unless you send a lower levels value. Send 4 or 5 for the even shorter periods inside them.
Every period has a start date and an end date in the local time of the birth place.
Get it from the API
POST /v1/dasha/vimshottari
# John Doe, born Aug 15, 1990, 10:30 AM, New York
curl -X POST "https://apiforastrology.com/api/astrology/v1/dasha/vimshottari" \
-H "Authorization: Bearer $ASTROLOGY_API_KEY" \
-H "Content-Type: application/json" \
-d '{"year":1990,"month":8,"day":15,"hour":10,"minute":30,"second":0,"latitude":40.7128,"longitude":-74.006,"timezone":"America/New_York"}'{
"system": "vimshottari",
"year_length_days": 365.25,
"moon_nakshatra_index": 5,
"nakshatra_fraction_elapsed": 0.09303881,
"starting_lord": "Mars",
"balance_at_birth_years": 6.348728,
"balance_method": "time",
"levels": 3,
"periods": [
{
"lord": "Mars",
"start": "1989-12-20T13:27:09.380502",
"end": "1996-12-20T07:27:09.380502",
"years": 7,
"partial_at_birth": true,
"balance_years": 6.348728,
"periods": [
{
"lord": "Mars",
"start": "1989-12-20T13:27:09.380502",
"end": "1990-05-18T16:54:09.380502",
"years": 0.408333,
"elapsed": true,
"periods": [
{
"lord": "Mars",
"start": "1989-12-20T13:27:09.380502",
"end": "1989-12-29T06:15:13.880502",
"years": 0.023819,
"elapsed": true
},
{
"lord": "Rahu",
"start": "1989-12-29T06:15:13.880502",
"end": "1990-01-20T15:10:16.880502",
"years": 0.06125,
"elapsed": true
},
{
"lord": "Jupiter",
"start": "1990-01-20T15:10:16.880502",
"end": "1990-02-09T12:25:52.880502",
"years": 0.054444,
"elapsed": true
}
]
},
{
"lord": "Rahu",
"start": "1990-05-18T16:54:09.380502",
"end": "1991-06-06T05:12:09.380502",
"years": 1.05,
"periods": [
{
"lord": "Rahu",
"start": "1990-05-18T16:54:09.380502",
"end": "1990-07-15T05:32:51.380502",
"years": 0.1575,
"elapsed": true
},
{
"lord": "Jupiter",
"start": "1990-07-15T05:32:51.380502",
"end": "1990-09-04T08:47:15.380502",
"years": 0.14
},
{
"lord": "Saturn",
"start": "1990-09-04T08:47:15.380502",
"end": "1990-11-04T02:08:06.380502",
"years": 0.16625
}
]
},
{
"lord": "Jupiter",
"start": "1991-06-06T05:12:09.380502",
"end": "1992-05-12T02:48:09.380502",
"years": 0.933333,
"periods": [
{
"lord": "Jupiter",
"start": "1991-06-06T05:12:09.380502",
"end": "1991-07-21T16:04:57.380502",
"years": 0.124444
},
{
"lord": "Saturn",
"start": "1991-07-21T16:04:57.380502",
"end": "1991-09-13T15:30:09.380502",
"years": 0.147778
},
{
"lord": "Mercury",
"start": "1991-09-13T15:30:09.380502",
"end": "1991-10-31T22:33:45.380502",
"years": 0.132222
}
]
}
]
},
{
"lord": "Rahu",
"start": "1996-12-20T07:27:09.380502",
"end": "2014-12-20T19:27:09.380502",
"years": 18,
"periods": [
{
"lord": "Rahu",
"start": "1996-12-20T07:27:09.380502",
"end": "1999-09-02T11:39:09.380502",
"years": 2.7,
"periods": [
{
"lord": "Rahu",
"start": "1996-12-20T07:27:09.380502",
"end": "1997-05-17T05:40:57.380502",
"years": 0.405
},
{
"lord": "Jupiter",
"start": "1997-05-17T05:40:57.380502",
"end": "1997-09-25T17:26:33.380502",
"years": 0.36
},
{
"lord": "Saturn",
"start": "1997-09-25T17:26:33.380502",
"end": "1998-02-28T20:54:27.380502",
"years": 0.4275
}
]
},
{
"lord": "Jupiter",
"start": "1999-09-02T11:39:09.380502",
"end": "2002-01-26T02:03:09.380502",
"years": 2.4,
"periods": [
{
"lord": "Jupiter",
"start": "1999-09-02T11:39:09.380502",
"end": "1999-12-28T08:46:21.380502",
"years": 0.32
},
{
"lord": "Saturn",
"start": "1999-12-28T08:46:21.380502",
"end": "2000-05-15T03:51:09.380502",
"years": 0.38
},
{
"lord": "Mercury",
"start": "2000-05-15T03:51:09.380502",
"end": "2000-09-16T08:17:33.380502",
"years": 0.34
}
]
},
{
"lord": "Saturn",
"start": "2002-01-26T02:03:09.380502",
"end": "2004-12-02T01:09:09.380502",
"years": 2.85,
"periods": [
{
"lord": "Saturn",
"start": "2002-01-26T02:03:09.380502",
"end": "2002-07-09T21:42:36.380502",
"years": 0.45125
},
{
"lord": "Mercury",
"start": "2002-07-09T21:42:36.380502",
"end": "2002-12-04T08:58:57.380502",
"years": 0.40375
},
{
"lord": "Ketu",
"start": "2002-12-04T08:58:57.380502",
"end": "2003-02-03T02:19:48.380502",
"years": 0.16625
}
]
}
]
},
{
"lord": "Jupiter",
"start": "2014-12-20T19:27:09.380502",
"end": "2030-12-20T19:27:09.380502",
"years": 16,
"periods": [
{
"lord": "Jupiter",
"start": "2014-12-20T19:27:09.380502",
"end": "2017-02-07T00:15:09.380502",
"years": 2.133333,
"periods": [
{
"lord": "Jupiter",
"start": "2014-12-20T19:27:09.380502",
"end": "2015-04-03T16:53:33.380502",
"years": 0.284444
},
{
"lord": "Saturn",
"start": "2015-04-03T16:53:33.380502",
"end": "2015-08-05T01:51:09.380502",
"years": 0.337778
},
{
"lord": "Mercury",
"start": "2015-08-05T01:51:09.380502",
"end": "2015-11-23T11:07:57.380502",
"years": 0.302222
}
]
},
{
"lord": "Saturn",
"start": "2017-02-07T00:15:09.380502",
"end": "2019-08-21T07:27:09.380502",
"years": 2.533333,
"periods": [
{
"lord": "Saturn",
"start": "2017-02-07T00:15:09.380502",
"end": "2017-07-03T12:23:33.380502",
"years": 0.401111
},
{
"lord": "Mercury",
"start": "2017-07-03T12:23:33.380502",
"end": "2017-11-11T14:24:45.380502",
"years": 0.358889
},
{
"lord": "Ketu",
"start": "2017-11-11T14:24:45.380502",
"end": "2018-01-04T13:49:57.380502",
"years": 0.147778
}
]
},
{
"lord": "Mercury",
"start": "2019-08-21T07:27:09.380502",
"end": "2021-11-26T05:03:09.380502",
"years": 2.266667,
"periods": [
{
"lord": "Mercury",
"start": "2019-08-21T07:27:09.380502",
"end": "2019-12-16T14:18:45.380502",
"years": 0.321111
},
{
"lord": "Ketu",
"start": "2019-12-16T14:18:45.380502",
"end": "2020-02-02T21:22:21.380502",
"years": 0.132222
},
{
"lord": "Venus",
"start": "2020-02-02T21:22:21.380502",
"end": "2020-06-19T20:58:21.380502",
"years": 0.377778
}
]
}
]
}
],
"balance_conventions": {
"longitude": {
"fraction_elapsed": 0.09312764,
"balance_years": 6.348107,
"first_period_ends": "1996-12-20T02:00:06.412309"
},
"time": {
"fraction_elapsed": 0.09303881,
"balance_years": 6.348728,
"first_period_ends": "1996-12-20T07:27:09.380502"
},
"used": "time",
"other": "longitude",
"shift_days": 0.2271,
"sources_agree": true,
"note": "longitude measures how far the Moon has moved through its birth nakshatra; time measures how long it has been there (bhayat over bhabhog), as a desktop program does. Every later date moves by the same shift."
},
"meta": {
"ayanamsa": "lahiri",
"ayanamsa_value": 23.7260727,
"julian_day": 2448119.10483,
"ephemeris": "JPL DE440s",
"node": "true",
"timezone": {
"source": "zone",
"offset_hours": -4,
"zone": "America/New_York",
"abbreviation": "EDT",
"dst": true,
"dst_hours": 1,
"ambiguous_resolved_by_fold": null,
"note": "read from the IANA tz database at this instant, so daylight saving and historical offset changes are included"
}
}
}Where the API returns it
| POST | /v1/dasha/vimshottari | Vimshottari dasha periods with dates |
| POST | /v1/reading/daily | Daily reading for a chart |
| POST | /v1/reading/weekly | Weekly reading for a chart |
What the API reference says
Each line is quoted from the reference page of the endpoint named above it.
- POST /v1/dasha/vimshottari · Vimshottari dasha periods with datesSet
levelsin the request body. 1 gives the main periods (mahadasha) and 2 adds sub-periods (antardasha). 3 adds the next level (pratyantardasha), and so on up to 5.
Feature page: Dashas (planetary periods). Who uses it: Astrology apps. See dasha periods in a full reading in the sample report. The classical rules the API follows are in the rulebook.
How we check the numbers
Every value here starts from planet positions worked out from NASA JPL planet data (DE440). We test them against NASA JPL Horizons, NASA's planet position service. On 25,571 positions from 1850 to 2149, the Sun and planets agree within 0.001 arc seconds. The Moon agrees within 0.011. On 2,000 random birth charts, the rising sign agrees with Swiss Ephemeris within 0.004 arc seconds. An arc second is 1/3,600 of a degree. A practicing astrologer reviews the rules behind these answers. See how we test.
Related terms
From the blog
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Your first answer
John Doe, New York
- RisingVirgoHast
- SunCancerAshlesha
- MoonTaurusMrigashira
- MarsAriesKrittika
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