M68 (NGC 4590) Observation Guide — Globular Cluster in Hydra

Overview

M68 is a Globular Cluster located in Hydra, cataloged as NGC 4590. With an apparent magnitude of 7.8, it lies About 33,300 light-years from Earth. This Intermediate-level object is best observed in the Spring sky.

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

Basic Data

Item	Data
Messier Number	M68
Catalog Number	NGC 4590
Object Type	Globular Cluster
Constellation	Hydra
Apparent Magnitude	7.8
Distance	About 33,300 light-years
Best Season	Spring
Difficulty	Intermediate
Required Equipment	Small telescope

Physical Characteristics

This globular cluster lies About 33,300 light-years from Earth and shines at magnitude 7.8. It contains numerous old red giant stars and is estimated to be over 10 billion years old.

Globular clusters are believed to have formed in the early stages of the Milky Way's history, making them key to understanding our galaxy's past.

Observation Guide

How to Find

M68 is located in the Hydra region. It transits around 20:00–22:00 during Spring, making it well-positioned for observation. use the main stars of Hydra as guide stars and confirm the exact position with a star chart or app.

Observation Tips

When observing globular clusters, the contrast between the dense core and the scattered outer regions is the highlight. Larger aperture telescopes allow you to resolve individual stars.

Recommended Equipment

A telescope with an aperture of 60mm or more is sufficient for observation.

Astrophotography Tips

For photographing M68, prime-focus astrophotography with a camera attached to a telescope is recommended. Use a tracking mount and appropriate exposure times.

Summary

M68 is a Globular Cluster observable in Hydra, rated Intermediate level. Enjoyable with a small telescope, it is one of the most popular Messier objects for observation. Try observing it in the Spring night sky!