Diadem

Diadem marks Coma Berenices as a binary. It is easy to spot without a telescope under decent skies. Look for it while tracing Coma Berenices on a dark night.

Wikipedia

Gaia has no usable parallax for this star (common for bright multiples). Distance uses the Hipparcos parallax instead.

ID
HIP 64241
Distance
17.83 pc · 58.1 ly
Parallax
56.10 mas (Hipparcos)
Magnitude (G)
4.43
Color (BP-RP)
-
Radius
unknown
RA · Dec
197.50° · 17.53°