JOURNAL ARTICLE

The Orion OB 1a Association: A neglected wonder of the celestial Hunter is within reach of the unaided eye.

  • Published In: Sky & Telescope, 2026, v. 151, n. 3. P. 12 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: O’Meara, Stephen James 3 of 3

Abstract

The article focuses on the Orion OB 1a association, a lesser-known grouping of stars located northwest of Orion's Belt, which can be observed with the naked eye. This association is part of the larger Orion OB 1 complex, which includes various star types and nebulae, and is characterized by young, hot, and massive blue giant stars. The article details the visual appearance of OB 1a, describing it as a tapered ellipse in the night sky, and highlights specific stars within this region, such as 22, 25, and 27 Orionis. It encourages readers to explore this celestial feature during clear, dark nights, emphasizing its unique visual characteristics. [Extracted from the article]

Additional Information

  • Source:Sky & Telescope. 2026/03, Vol. 151, Issue 3, p12
  • Document Type:Article
  • Subject Area:Astronomy and Astrophysics
  • Publication Date:2026
  • ISSN:0037-6604
  • Accession Number:190835839
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