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........................
p Eridani A31.54840.584142.80.880.79.........
Center of H.Z. A0.530.4110142.8...............
p Eridani B32.24840.584142.80.860.6.........
Center of H.Z. B0.500.3810142.8...............


NOTE: This animation attempts to relate the orbits (and possible habitable zones) of Stars A and B in the p Eridani AB system 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 142.82) 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.

According to the new Sixth Catalog of Orbits of Visual Binaries, stars A and B are separated by an "average" distance of about 63.7 AU (semi-major axis of 7.817" using a HIPPARCOS parallax of 0.122275 +/- 0.00141"). The two stars move in a highly elliptical orbit (e=0.534) that swings them between 29.7 and 97.7 AUs apart and takes about 484 years to complete, and is inclined at 142.8 from the perspective of an observer on Earth (G.B. van Albada, 1957).


 

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