M14 (NGC 6402) Observation Guide — Globular Cluster in Ophiuchus

Overview

M14 is a globular cluster in Ophiuchus, catalogued as NGC 6402. At Magnitude 7.6, it lies roughly 29,000 light-years away. Summer brings it to prime position, and the cluster suits intermediate observers.

Globular clusters are dense, spherical systems packed with hundreds of thousands to millions of stars. They orbit in the halo of the Milky Way and are among the oldest objects in the known universe.

Basic Data

Physical Characteristics

M14 shines at Magnitude 7.6 from about 29,000 light-years away. Its interior contains ancient red giants, and the cluster's age is estimated at over 10 billion years.

Observation Guide

Finding It

M14 is in Ophiuchus. Summer evenings around 8–10 PM bring it to a useful elevation. Use Ophiuchus's main stars as reference points, then confirm the exact location with a star chart or app.

Tips for Observing

The contrast between the bright core and the diffuse outer halo is the visual payoff. More aperture resolves individual stars across the cluster.

Recommended Equipment

A small telescope with 60 mm aperture or more handles M14 well.

Astrophotography Tips

Prime focus imaging through a tracking telescope is the standard approach. Choose an exposure time that preserves central detail while reaching the fainter outer members.

Summary

M14 is an intermediate-level globular cluster in Ophiuchus, one of several rewarding clusters this constellation contains on summer nights.