How we calculate

Every chart on this site is computed from astronomical data for your exact moment and place of birth. Nothing is generated from a template, and nothing is inferred from your birthday alone. This page states exactly what is used, so the claim can be checked rather than taken on trust.

The astronomy

Planetary positions	JPL DE421 ephemeris, published by NASA's Jet Propulsion Laboratory. This is the same class of data used for spacecraft navigation.
Star positions	The Hipparcos catalogue, from the European Space Agency's astrometric mission.
Zodiac	Sidereal, using the True Chitra Paksha ayanamsa. For a birth in 1990 this places the offset at about 23.84 degrees.
Time zone	Resolved from your birth coordinates for that specific date, so historical offsets and daylight-saving rules are applied correctly rather than assumed.
Software	Skyfield for the astronomy, jyotishganit for the Vedic chart construction. Both are open source and independently inspectable.

What the ayanamsa is, and why it matters

Western astrology measures the zodiac from the spring equinox, which is tied to the seasons. Vedic astrology measures it from the fixed stars. Those two starting points coincided roughly two thousand years ago and have drifted apart since, because the Earth's axis wobbles slowly, a motion called precession.

The size of that gap at any moment is the ayanamsa, and it is subtracted from the tropical position to get the sidereal one. Different schools use slightly different ayanamsas, which is why two Vedic sites can disagree by a fraction of a degree. We use True Chitra Paksha and say so, rather than leaving you to guess why a number differs elsewhere.

Where the meanings come from

The calculation is astronomy. The meanings are tradition, and the two deserve to be labelled differently.

• Standardised across sources. The ruling planet, presiding deity and symbol of each nakshatra. The element, modality and ruler of each sign. The Moon's exaltation in Taurus and debilitation in Scorpio. Schools do not meaningfully disagree on these.
• Classical but terse. The character of a nakshatra or a placement. The Brihat Parashara Hora Shastra and the Brihat Samhita of Varahamihira give short lines; the Taittiriya Brahmana supplies the shakti verse that anchors each nakshatra.
• Later compilation. Everything longer than those short lines. Modern descriptions expand on the classical anchors, and they vary between authors. We render the anchors in plain words rather than inventing detail that was never in the source.

What we do not do

• We do not predict events, and we do not promise outcomes.
• We do not give medical, legal, financial or psychological advice.
• We do not claim one astrological system is more accurate than another. They measure different things from different reference points.
• We do not invent credentials. No fabricated degrees, no invented lineage, no borrowed authority.
• We do not fill gaps with guesses. If your birth time is missing, we tell you which parts of the reading are unavailable instead of choosing a plausible value.

Who writes this

Mira is the name this work is published under. Readings and articles are prepared by our team from computed charts and the sources named above. It is an editorial name, not a claim to be a single named astrologer with credentials we have not shown you.

We think naming the method is worth more than naming a person. The calculation can be checked; a biography cannot.

Corrections

If you find an error, in the astronomy or in a source attribution, write to us and we will fix it and say what changed. Our contact details are on the contact page.