Free Fixed Stars Calculator

Fixed stars are distant suns that appear nearly stationary relative to one another and the stellar background. Unlike planets, which visibly move through the zodiac over weeks or years, a fixed star's apparent tropical longitude changes slowly, about 1 degree every 72 years, because of axial precession. When a fixed star closely contacts a natal planet or chart point, astrologers read it as an additional symbolic layer.

The tradition of interpreting fixed stars reaches back to Babylonian astrology and was systematized in Hellenistic and later sources. Ptolemy classified many stars and constellation regions by “planetary nature,” and later authors such as Robson extended those attributions. For example, Regulus is traditionally given a Mars-Jupiter nature.

Our calculator checks 122 named stars including all four Royal Stars (Aldebaran, Regulus, Antares, and Fomalhaut), Behenian stars such as Algol and Spica, and dozens of traditional stars with Robson-style planetary natures. The astronomical catalog is HYG-derived, and Augurine's calculation engine precesses those star positions to the birth date before comparing them with the natal chart. Browse all 122 stars for individual interpretations, mythology, and conjunction guides, or read our introduction to fixed stars.

Start with the conjunctions tab. These show fixed stars within orb of your natal planets and points by ecliptic longitude. Stars are surfaced by tier: Royal Stars first, followed by Behenian stars, then traditional stars. Tighter orbs are usually read as more important: a 0.2° contact is much closer than one at 1.5°.

Parallels of declinationoccur when a planet and star share the same celestial declination (distance north or south of the celestial equator). Many astrologers read parallels similarly to conjunctions, and they can surface stars far from the ecliptic that rarely make longitude contacts. Stars like Sirius (declination −16°) are more likely to contact planets through declination than ecliptic longitude.

Parans are checked for your specific birth latitude and require a known birth time. A paran occurs when a star and planet are simultaneously on key points (rising, setting, culminating, or at the nadir). Bernadette Brady helped revive this sky-based approach. Augurine uses a paran-style screening calculation, so treat these hits as a useful lead rather than as a replacement for specialist fixed-star paran work.

If you are focused on dawn visibility rather than natal contacts, use the heliacal visibility tool instead. This page stays focused on conjunctions, declination parallels, and paran-style contacts inside the natal chart.