Deep Sky ObjectsBeginnerWinter

M35 (NGC 2168) Observation Guide — Open Cluster in Gemini

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Overview

M35 is an open cluster in Gemini, catalogued as NGC 2168. Its apparent Magnitude is 5.3, and it lies roughly 2,800 light-years away. Winter brings it to prime position, making it a rewarding target for beginners.

Open clusters are loose groupings of young stars that formed together from a single molecular cloud. They populate the Milky Way's disk, and their stars are typically on the younger side.

Basic Data

ItemData
Messier NumberM35
Catalog NumberNGC 2168
Object TypeOpen Cluster
ConstellationGemini
Apparent Magnitude5.3
Distance~2,800 light-years
Best SeasonWinter
DifficultyBeginner
Required EquipmentBinoculars, small telescope

Physical Characteristics

M35 lies about 2,800 light-years away and shines at Magnitude 5.3, containing dozens to hundreds of stars all formed from the same molecular cloud.

Observation Guide

Finding It

M35 is positioned in Gemini. Winter evenings around 8–10 PM put it in a favorable position in the sky. It's bright enough to see without optical aid — use Gemini's main stars as signposts, then confirm the exact location with a star chart or app.

Tips for Observing

Binoculars or a low-power telescope at wide field bring out the cluster's depth and character. Resist the temptation to magnify too much. The range of star colors is one of the visual highlights.

Binoculars or a small telescope work well. The cluster is bright enough to catch even from suburban areas affected by Light pollution.

Astrophotography Tips

Prime focus photography through a tracking telescope reveals the cluster well. Choose exposure times that preserve color differences among the member stars.

Summary

M35 is a bright, accessible open cluster in Gemini — an excellent beginner target on any clear winter evening.

Specifications

Object Type散開星団
Messier Number35
Magnitude5.3
ConstellationGem
Best Seasonwinter
Difficultybeginner