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Cor Caroli, also called Alpha Canum Venaticorum, binary star located 110 light-years from Earth in the constellation Canes Venatici and consisting of a brighter component (A) of visual magnitude 2.9 and a companion (B) of magnitude 5.5.
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Epsilon Telescopii is a binary star system: the brighter component, Epsilon Telescopii A, is an orange giant of spectral type K0III with an apparent magnitude of +4.52, while the 13th magnitude companion, Epsilon Telescopii B, is 21 arcseconds away from the primary, and just visible with a 15 cm aperture telescope on a dark night.
It is a binary star, the brighter component of which is an orange giant and the fainter a yellow-white main sequence star.
The brighter component, termed Sirius A, is a main-sequence star of spectral type A1V, with an estimated surface temperature of 9,940 K.
The brighter component, Theta Coronae Borealis A, is a blue-white star that spins extremely rapidly at a rate of around 393 km per second.
The brighter component is a yellowish star, known as Kappa Tucanae A with an apparent magnitude of 5.33 and spectral type F6V, while the fainter lies 5 arcseconds to the northwest.
The brighter component is a close eclipsing binary (specifically, a rotating ellipsoidal variable), with a minor dip of magnitude (0.1).
The brighter component is a Rapidly oscillating Ap star, pulsating with a period of 16.2 minutes.
The brighter component is a bluish Be star of spectral type B5IV+ and magnitude 4.51, while the dimmer component is a yellow star of magnitude 5.5.
A shallower secondary eclipse occurs when the brighter component passes in front of the other; it corresponds to an annular eclipse (or transit).
The brighter component has been classed as a Delta Scuti variable star, though this view is not universal.
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