page_title: Zeta1 Lyrae
section_title: Observational history
hierarchical_section_title: Zeta1 Lyrae / Observational history
caption_attribution_description: English: Zeta Lyrae Double Star - photographed with amateur equipment Skywatcher 10" Quattro Newtonian, Skywatcher AZ-EQ6 GT mount, Skywatcher f4 aplanatic coma corrector, Skywatcher 9x50 finderscope Canon EOS100D camera, 6 sec exposure, ISO 800 Sărata Monteoru village, Merei commune, Buzău county, Romania
context_page_description: Zeta¹ Lyrae, Latinized from ζ¹ Lyrae, is a binary star in the northern constellation of Lyra. Based upon an annual parallax shift of 20.89 mas as seen from Earth, the pair are located about 156 light years from the Sun. It is visible to the naked eye with an apparent visual magnitude of 4.37.
context_section_description: ζ¹ Lyrae was discovered to be a spectroscopic binary by William Wallace Campbell and Heber Doust Curtis in 1905 from photographic plates taken at the Lick Observatory between 1902 and 1904. The first orbit was calculated by Frank Craig Jordan of Allegheny Observatory in 1910 with results in good agreement with the most recent orbit.
caption: The stars Zeta1 and Zeta2 Lyrae photographed with an amateur telescope by David Chifiriuc. The visual separation between the two stars is 43.7″ (in 2020).
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