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Free 7-Generation Calculator

Your Ancestral Birth Chart

Seven real positions, calculated from your date, hour and place of birth, then read the way the Avestan tradition reads them.

Calculate my free chart

You are the seventh generation. Six wrote your story before you arrived.

Enter Your Birth Data

Free chart. It opens in your free account.

I was born on
at Time of birth (optional) 24-hour clock, as on the birth record. Leave it empty if nobody knows it. in
. Read my chart as a .
, if it is not your own.
Reads

Noon is used. No ascendant or houses, and the Moon may sit in one of two signs; the reading says so. A parent or the birth record may have the time.

Your parents' and grandparents' dates can be added on the reading, once it is cast.

Your chart opens in your free account. No card.

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How your chart is calculated

Your birth details go into an astronomical calculation. What it finds decides which chapters you read.

Black and white photograph of Dimorphos, a small egg-shaped asteroid covered in boulders, against black space. NASA/Johns Hopkins APL. Black and white photograph of Dimorphos, a small egg-shaped asteroid covered in boulders, against black space. NASA/Johns Hopkins APL.
Sun
10° Libra
Moon
9° Cancer
Mercury
3° Scorpio
Venus
8° Scorpio
Mars
3° Leo
Jupiter
20° Leo
Saturn
11° Aries
On 3 October at
12:00 UTC

Seven positions for 3 October 2026. Check them against any ephemeris.

Dimorphos, photographed by NASA's DART spacecraft. Image: NASA/Johns Hopkins APL. NASA does not endorse Horospire. Image sources

Tested against NASA's JPL ephemeris: every body stays within about a tenth of a degree. See the working.

As seen on

What a reading looks like

One page of a real chapter, as a reader gets it.

Chapter two of seven, written out in full. Read the whole chapter →

A page of a Horospire reading. Chapter 2 of 7, Feelings and family, with a photograph of the Moon, the opening of the interpretation, and the basis rail: the placement, an everyday example and a question to keep. A page of a Horospire reading. Chapter 2 of 7, Feelings and family, with a photograph of the Moon, the opening of the interpretation, and the basis rail: the placement, an everyday example and a question to keep. A page of a Horospire reading on a phone. Chapter 2 of 7, Feelings and family, with a photograph of the Moon and the opening paragraph. A page of a Horospire reading on a phone. Chapter 2 of 7, Feelings and family, with a photograph of the Moon and the opening paragraph.
An example chart, not a real person. Moon photograph: NASA, Apollo 11. Image sources

The twelve signs

Each sign answers to one of the seven. Point at a sign and its stone lights. Its marks sit on that stone.

All sign pages

  1. Your own generation Bennu, photographed by OSIRIS-REx. NASA/Goddard/University of Arizona. Bennu, photographed by OSIRIS-REx. NASA/Goddard/University of Arizona.
  2. Parents Phobos, photographed by Mars Reconnaissance Orbiter. NASA/JPL-Caltech/University of Arizona. Phobos, photographed by Mars Reconnaissance Orbiter. NASA/JPL-Caltech/University of Arizona.
  3. Grandparents Gaspra, photographed by Galileo. NASA/JPL. Gaspra, photographed by Galileo. NASA/JPL.
  4. Great-grandparents Hyperion, photographed by Cassini. NASA/JPL/Space Science Institute. Hyperion, photographed by Cassini. NASA/JPL/Space Science Institute.
  5. Fifth generation Arrokoth, photographed by New Horizons. NASA/Johns Hopkins APL/Southwest Research Institute, National Optical Astronomy Observatory. Arrokoth, photographed by New Horizons. NASA/Johns Hopkins APL/Southwest Research Institute, National Optical Astronomy Observatory.
  6. Sixth generation Eros, photographed by NEAR Shoemaker. NASA/JPL/JHUAPL. Eros, photographed by NEAR Shoemaker. NASA/JPL/JHUAPL.
  7. Seventh generation Ida, photographed by Galileo. NASA/JPL. Ida, photographed by Galileo. NASA/JPL.
Seven real NASA photographs of small worlds, stacked by us and not to scale. The marks and colours are ours. NASA does not endorse Horospire.
Image credits

From the top: Bennu (OSIRIS-REx, NASA/Goddard/University of Arizona), Phobos (Mars Reconnaissance Orbiter, NASA/JPL-Caltech/University of Arizona), Gaspra (Galileo, NASA/JPL), Hyperion (Cassini, NASA/JPL/Space Science Institute), Arrokoth (New Horizons, NASA/Johns Hopkins APL/Southwest Research Institute, National Optical Astronomy Observatory), Eros (NEAR Shoemaker, NASA/JPL/JHUAPL) and Ida (Galileo, NASA/JPL). Image sources

Start with your birth date.

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