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The Infrared Optical Telescope Array (IOTA) was a stellar interferometer array. IOTA began with an agreement in 1988 among five Institutions, the Smithsonian Astrophysical Observatory, Harvard University, the University of Massachusetts Amherst, the University of Wyoming, and MIT/Lincoln Laboratory, to build a two-telescope stellar interferometer for the purpose of making fundamental ...
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Iota 1 Normae (ι 1 Normae) is a triple star [2] system in the southern constellation of Norma. With a combined apparent visual magnitude of 4.69, [ 2 ] it is faintly visible to the naked eye. Based upon an annual parallax shift of 25.39 mas as seen from Earth, [ 1 ] this system is located about 128 light years from the Sun .
Iota 1 Librae is a four star system. [3] The inner pair, designated components Aa and Ab, form a spectroscopic binary with an orbital period of 22.35 years and an eccentricity of 0.35. [ 5 ] The brighter member has a stellar classification of B9 IVp Si , [ 3 ] indicating it is a B-type subgiant star with an overabundance of silicon in the ...
The limb-darkened angular diameter of Iota 1 Scorpii is estimated at 1.896 ± 0.213 mas. [12] At the estimated distance, this corresponds to a physical radius of 120.3 R ☉ . [ 7 ] The effective temperature of the photosphere is 6,910 or 7,103 K, [ 8 ] which gives it a yellow-white hue typical of an F-type star.
Iota 1 Cygni, Latinized from ι 1 Cygni, is a probable binary star [6] system in the northern constellation Cygnus, and is separated by less than a degree from its brighter visual neighbor, Iota 2 Cygni. [9] It is near the lower limit of visibility to the naked eye with an apparent visual magnitude of 5.75. [8]
ι 1 Muscae, Latinised as Iota 1 Muscae, is a solitary [8] star in the southern constellation of Musca, near the southern constellation border with Chamaeleon. It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude is 5.05. [ 2 ]
Iota Cancri (ι Cnc, ι Cancri) is a double star in the constellation Cancer approximately 300 light years from Earth. The two stars of ι Cancri are separated by 30 arcseconds , changing only slowly.