Sirius is a binary star consisting of a main-sequence star of spectral type A0 or A1, termed Sirius A, and a faint white dwarf companion of spectral type DA2, termed Sirius B.

Feb 7, 2025 · Bottom line: Now is a great time to see Sirius’ dim companion, the white dwarf Sirius B. The two are currently at their maximum separation of 11 arcseconds, as viewed from Earth.

Dec 13, 2025 · Sirius B (Alpha Canis Majoris B) is a white dwarf located in the constellation of Canis Major, The Big Dog. A white dwarf is the remains of a small star that exhausted its fuel and died, …

Dec 13, 2005 · Sirius B, a white dwarf, is very faint because of its tiny size, only 7,500 miles in diameter. White dwarfs are the leftover remnants of stars similar to the sun.

Jul 27, 2005 · Key Takeaways: Sirius is a binary star system, 8.6 light-years from Earth. Sirius B, a white dwarf, was once a much larger, brighter star. Sirius A and B are significantly younger than our...

Feb 16, 2025 · However, behind its radiant glow lies a hidden companion— Sirius B, a white dwarf star with an extraordinary story. In this post, we’ll explore the mysteries of Sirius B, its cosmic …

Nov 15, 2009 · [/caption] Sirius B is the name of the fainter, smaller, less massive star in the Sirius binary system (the brighter, larger, more massive one is Sirius A, or just Sirius). It was...

Other articles where Sirius B is discussed: Sirius: This companion star, Sirius B, is about as massive as the Sun, though much more condensed, and was the first white dwarf star to be discovered.

Sirius B, often overshadowed by its dazzling companion Sirius A, is a celestial object of immense scientific interest. This white dwarf, the remnant of a once-vibrant star, offers a window into the life …

The orbit of Sirius B around A as seen from Earth (slanted ellipse). The wide horizontal ellipse shows the true shape of the orbit (with an arbitrary orientation) as it would appear if viewed straight on.