M105 (NGC 3379) Observation Guide — Elliptical Galaxy in Leo

Overview

M105 is an elliptical galaxy in Leo, catalogued as NGC 3379. At Magnitude 9.3, it lies roughly 38 million light-years away. Spring evenings are best for viewing, though the object is suited to advanced observers.

Elliptical galaxies are smooth, featureless stellar systems composed mainly of old stars. Without much gas or dust, they have largely stopped forming new stars.

Basic Data

Physical Characteristics

M105 lies about 38 million light-years away and shines at Magnitude 9.3. It's the brightest elliptical in the Leo I Group and is often observed alongside neighboring galaxies M96 and M95.

Observation Guide

Finding It

M105 is in Leo. Spring evenings around 8–10 PM place it at a good altitude. Use Leo's main stars as anchors, then confirm M105's precise location with a star chart or app.

Tips for Observing

Dark skies and aperture are critical. Wide-field views may capture M96 and M95 in the same frame. Full dark adaptation is essential before attempting to distinguish the galaxy from the background sky.

Recommended Equipment

A medium telescope with at least 80 mm aperture under dark skies is needed.

Astrophotography Tips

M105 is typically imaged as part of the Leo I Group alongside M96 and M95. An Equatorial mount, high ISO, and long exposures with image stacking reveal the galaxy's smooth elliptical profile.

Summary

M105 is an advanced-level elliptical galaxy in Leo — best approached alongside its Leo I Group neighbors on a clear spring night.