Orbital
Distance

(a=AUs)
Orbital
Period

(P=years)
Orbital
Eccentricity

(e)
Orbital
Inclination

(i=degrees)

Mass

(Solar)

Diameter

(Solar)

Density

(Earths)
Surface
Gravity

(Earths)

Metallicity
(Solar)
AB Mass Center0.0........................
Struve 1321 B48.79750.2821.00.60-0.730.65.........
Center of H.Z. B0.170.0822021.0...............
Struve 1321 A59.39750.2821.00.43-0.600.63-0.69.........
Center of H.Z. A0.1750.0944021.0...............


NOTE: This animation attempts to relate the possible orbits of Struve 1321 AB (and their tiny habitable zones) to their common center of mass. To enlarge the display, the orbits have been arbitrarily rotated by 45 degrees. Although the initial display shows the system's actual orbital tilt (at an inclination of 21.0) from the visual perspective of an observer on Earth, the orbital inclination of any planet that may be discovered someday around either star would likely be different from those of the habitable zone orbits depicted here. For the purposes of this animation, the masses of Stars A and B were set to be 0.60 and 0.73 Solar, respectively.

According to possibly premature orbit estimates that still the only ones available in the Sixth Catalog of Visual Orbits of Binary Stars, stars A and B are separated on average by 108 AUs (16.675" of a semi-major axis using an NSTARS' average of 21.11 ly) in an eccentric orbit (e= 0.28) that takes 975 years to complete. The orbit is inclined by 21.0 to Earth's line of sight (Kyongae Chang, 1972; and Morbey and Griffin, 1987).


 

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