Beta Doradus, HD 37350, HIP 26069 and permanent object 762 are the same southern star. SIMBAD classifies it as a classical Cepheid and records a visual cycle from roughly magnitude 3.45 to 4.05 with a period of 9.842 days. Its catalogue distance is about 341 ± 16 parsecs, approximately 1,110 light-years. Source: [SIMBAD, Beta Doradus](https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=bet+Dor).
A classical Cepheid is not dimmed by an orbiting body. The star's outer layers pulsate: temperature, radius, spectrum and brightness change in a repeatable sequence. More luminous Cepheids take longer to complete a cycle, producing the period–luminosity relation. Once calibrated with nearby stars whose distances are measured geometrically, that relation lets astronomers infer distances to Cepheids too remote for a comparably precise parallax.
Benedict and collaborators used Hubble's Fine Guidance Sensor to measure parallaxes for nine Galactic Cepheids, including Beta Doradus. They obtained 3.14 ± 0.16 milliarcseconds for this star, corresponding to about 318 parsecs by simple inversion. The sample tied absolute parallaxes to period–luminosity zero points in several passbands. Source: [Benedict et al., *The Astronomical Journal* 133, 1810](https://arxiv.org/abs/astro-ph/0612465). The difference from SIMBAD's later catalogue distance is a useful uncertainty, not a reason to average incompatible measurements without examining their calibrations.
Another route combines the changing radial velocity with a surface-brightness estimate to recover physical expansion. Taylor and Booth found a mean radius of 67.8 ± 0.7 solar radii and a distance of 349 ± 4 parsecs, while warning that systematic errors were below about three percent rather than captured completely by the formal figures. They limited cycle-to-cycle radial-velocity changes to 0.57 kilometres per second. Source: [Taylor & Booth, *Monthly Notices of the Royal Astronomical Society* 298, 594](https://academic.oup.com/mnras/article/298/2/594/1056633). Converting a velocity curve into radius requires a projection factor for the moving atmosphere, so the method is not purely geometric.
Beta is its Bayer letter in Dorado; it has no IAU-approved proper name. Dorado represents the dolphinfish, a southern constellation introduced on European charts after late-sixteenth-century voyages. The letter does not encode the pulsation period or prove association with Alpha Doradus.
The stored position is approximately right ascension 5h 34m and declination −62° 29′. It never rises at latitude 45° N; even an ideal horizon would miss it by about 17°. At 35° S it culminates near 63° altitude. These are coordinate calculations, separate from weekly darkness.
In the accepted Dorado figure, begin with Alpha Doradus at the northern vertex and trace the long side about 10.7° southeast to Beta. Beta also lies roughly 7.3° north of the Large Magellanic Cloud's centre, but that extended glow is only a broad regional check. HIP 26069 appears in the accepted geometry; the rendered finder and reader link still require review.
Beta Doradus is a naked-eye star from southern latitudes. Its six-tenths-of-a-magnitude range can be followed over successive nights with stable comparison stars, although colour differences and extinction can bias visual estimates. A telescope does not show the radial breathing directly. Date each estimate, use the same comparison sequence, and keep the permanent pulsation story separate from the week's Moon and weather.
