Western Astrology

Void-of-course Moon

Void-of-course Moon periods in a date range (UTC). Rule used: the traditional one — the Moon is void from its last exact Ptolemaic aspect (conjunction, sextile, square, trine, opposition) to the Sun, Mercury, Venus, Mars, Jupiter or Saturn until it enters the next sign (William Lilly, Christian Astrology, 1647, p. 112). Outer planets are not counted. Each period gives start and end in UTC, the last aspect, the sign the Moon is in and the sign it enters next. Range limit 92 days.

post/v1/western/moon/void-of-course

Request

  • Base URL: https://api.asterwise.com
  • URL: https://api.asterwise.com/v1/western/moon/void-of-course
  • Auth: HTTP bearer

Request body

from_datestring required

First day of the range (YYYY-MM-DD, UTC).

to_datestring required

Last day of the range (YYYY-MM-DD, UTC, inclusive). At most 92 days after from_date.

Example request

{
  "from_date": "2026-03-01",
  "to_date": "2026-03-31"
}

Response

Successful Response

successboolean

True if the request succeeded

messagestring

Human-readable status message

Example response

{
  "data": {
    "periods": [
      {
        "moon_sign": "Virgo",
        "next_sign": "Libra",
        "last_aspect": {
          "planet": "Venus",
          "aspect": "trine"
        }
      }
    ]
  }
}

Changes

No recorded changes to this operation across all 2 revisions of this API.