Regulus is a visual triple star. Hipparcos was the predecessor to Gaia. Its distance from the earth is about 85 light-years.
In fact, if Regulus were spinning only 15% faster, it would tear itself apart. Sky & Telescope diagram. Visibility. Combining these, we get a relatively short distance between Bajor and Earth, in the 50-200 ly ballpark. The Moon keeps the same side or face, towards the Earth during its orbit. Rigel, of nearly the same absolute magnitude, but closer, stands even higher in the list. Distance, Size, and Mass. The Moon makes a complete orbit around the Earth in 27 Earth days. The cause of Regulus… While real stars distances are highly accurate as they are based on the newest data available (from the 1990s HIPPARCOS satellite survey), somehow even revising older information (e.g. Obviously, Deneb is intrinsically very bright to make this list from its greater distance.

The brightest is Regulus (='Little King') at 85 light-years from Earth, the second brightest Denebola at 42 light-years. Regulus . Eta Leonis, north from Regulus, looks weak, but it spreads a hundred times as much light as Regulus. The stresses created by this speed distort Regulus’s shape. The distance from Earth to the sun is called an astronomical unit, or AU, which is used to measure distances throughout the solar system.

For some decades, the most important distance measurement for Deneb is that from ESA’s Earth-orbiting Hipparcos satellite, which operated from 1989 to 1993. Its name is Latin for "prince." Star System. The primary star Regulus A has 3.8 solar masses and a radius of around 3.9 solar radii. However, Regulus’ heliacal rising, which is when the star becomes visible in the east for a short while just before sunrise, occurs in the first week of September each year, and is visible to most observers on Earth. The Moon is Earth’s satellite and orbits the Earth at a distance of about 384,000 km or 239,000 miles. Regulus (Alpha Leonis) is the brightest star in the constellation Leo and the 21st brightest star in the sky as seen from Earth. Jupiter , for example, is …

Regulus or Alpha Leonis (Alp Leo) is the brightest naked eye star in the constellation Leo.With an apparent magnitude of 1.36, Regulus is the 21st brightest star in the entire sky (see: 50 Brightest Stars ).Its absolute magnitude is -0.52 and its distance is 78 light years.The Equinox J2000 equatorial coordinates are RA = 10h 08m 22.3s, Dec = +11° 58' 02". The shape and size of Regulus compared to the Sun (smaller yellow circle).
The absolute magnitude is the magnitude the stars would have if viewed from a distance of 10 parsecs or some 32.6 light years. This jibes well with the dialogue evidence: Regulus is said to be about three hundred lightyears from Bajor, and lies about 80 lightyears to the "lower right" of Earth in reality. Regulus (reg -yŭ-lŭs) (α Leo) A bluish-white star that is the brightest one in the constellation Leo and lies at the base of the Sickle of Leo.

of 1.35 makes it one of the 25 brightest stars in the sky.

The primary pair, Regulus A and Regulus B are separated by a distance of around 0.40 AU. At a distance of 79 light-years / 24 parsecs from the Sun, the Regulus system is quite far from us.

This star is at a much greater distance from Earth: 1700 light-years.