page_title: 42 Orionis
hierarchical_section_title: 42 Orionis
caption_attribution_description: English: Optics 32-inch Schulman Telescope (RCOS) Camera SBIG STX16803 CCD Camera Filters Astrodon Gen II Date November - December 2015 Location Mount Lemmon SkyCenter Exposure RGB = 7 : 7 : 7 Hours Acquisition Astronomer Control Panel (ACP), Maxim DL/CCD (Cyanogen), FlatMan XL (Alnitak) Processing CCDStack, Photoshop CC, PixInsight Credit Line &amp; Copyright Adam Block/Mount Lemmon SkyCenter/University of Arizona
context_page_description: 42 Orionis is a class B1V star in the constellation Orion. Its apparent magnitude is 4.59 and it is approximately 900 light years away based on parallax.
  The primary star, Aa, has one spectroscopic companion Ab of magnitude 6.3 and separation 0.16", and a more distant companion B of 7.5 magnitude at 1.6" separation.
  c Orionis is surrounded by NGC 1977 one of a smaller fainter group of named nebulae just north of the Orion Nebula. c Ori is the star which excites and illuminates NGC 1977.
context_section_description: 42 Orionis is a class B1V (blue main-sequence) star in the constellation Orion. Its apparent magnitude is 4.59 and it is approximately 900 light years away based on parallax.
  The primary star, Aa, has one spectroscopic companion Ab of magnitude 6.3 and separation 0.16", and a more distant companion B of 7.5 magnitude at 1.6" separation.
  c Orionis is surrounded by NGC 1977 one of a smaller fainter group of named nebulae just north of the Orion Nebula. c Ori is the star which excites and illuminates NGC 1977.
caption: 42 Ori is the bright star at the centre of NGC 1977. (Mount Lemmon SkyCenter Schulman Telescope courtesy Adam Block
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