Messier 40

Summary

Messier 40 is a double star^[1]. It ranks in the top 9% of double_star entities by monthly Wikipedia readership (97 views/month).^[2]

Key Facts

• Messier 40 is credited with the discovery of Charles Messier^[3].
• Messier 40's instance of is recorded as double star^[4].
• Messier 40's constellation is recorded as Ursa Major^[5].
• Messier 40 is part of Orion Arm^[6].
• Messier 40's Commons category is recorded as Messier 40^[7].
• Messier 40 comprises Q77922423^[8].
• Messier 40 comprises Q77924792^[9].
• Messier 40's catalog code is recorded as M 40^[10].
• Messier 40's catalog code is recorded as WDS J12222+5805AB^[11].
• Messier 40's catalog code is recorded as Winnecke 4^[12].
• Messier 40's time of discovery or invention is recorded as October 24, 1764^[13].
• Messier 40's topic's main category is recorded as Category:Messier 40^[14].
• Messier 40's Commons gallery is recorded as Messier 40^[15].
• Messier 40's apparent magnitude is recorded as {'amount': '+8.4'}^[16].
• Messier 40's distance from Earth is recorded as {'unit': 'Q531', 'amount': '+455'}^[17].
• Messier 40's right ascension is recorded as {'unit': 'Q28390', 'amount': '+185.552208'}^[18].
• Messier 40's declination is recorded as {'unit': 'Q28390', 'amount': '+58.082944'}^[19].
• Messier 40's epoch is recorded as J2000.0^[20].
• Messier 40's age estimated by a dating method is recorded as {'unit': 'Q524410', 'amount': '+4.1'}^[21].

Body

Geography

Messier 40 is part of Orion Arm^[6].

Designation and Status

Messier 40's instance of is recorded as double star^[4].

History and Context

Catalog codes include M 40^[10], WDS J12222+5805AB^[11], and Winnecke 4^[12].

Why It Matters

Messier 40 ranks in the top 9% of double_star entities by monthly Wikipedia readership (97 views/month).^[2] It has Wikipedia articles in 26 language editions, a strong signal of global cultural recognition.^[22] It is known by 17 alternative names across languages and contexts.^[23]