About Winecke 4 (M40)

Winecke 4 is a rewarding deep-sky target and shows up as a faint patch of light. It is quite faint.

Current visibility

Right now it is at about 27° altitude and reaches 32° around 12:04 AM.

It stays above 30° for roughly 3 hours.

Observing conditions matter, structure becomes clearer under good conditions.

Observing tips

It can be challenging under typical skies.

What to expect

At higher magnification, subtle detail can be detected.

It appears more compact than typical clusters.

Type

Double Star

Constellation

Ursa Major

Distance

510 ly

Size

49.0'

Season

Spring

Difficulty

Easy

Magnitude

9.3