Orbital
Distance

(a=AUs)
Orbital
Period

(P=years)
Orbital
Eccentricity

(e)
Orbital
Inclination

(i=degrees)

Mass

(Earth)

Diameter

(Earth)

Density

(Earths)
Surface
Gravity

(Earths)

Metallicity
(Solar)
AB Mass Center0.0........................
Groombridge 34 A25.52,6000.0061.4125,00037.1.........
Planet b?0.0720.0310.1261.4=>5.4>1.0.........
Inner H.Z. Edge A?0.1500.083061.4...............
Outer H.Z. Edge A?0.2930.228061.4...............
Groombridge 34 B121.32,6000.0061.426,00020.7.........
Inner H.Z. Edge B?0.0650.041061.4...............
Outer H.Z. Edge B?0.1260.111061.4...............


NOTE: This animation attempts to relate the orbits (and possible habitable zones) of Stars A and B in the Groombridge AB system to their common center of mass. Although initial display shows the system's actual orbital tilt (at an inclination of 61.4) 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.

The precise orbital elements of Groombridge 34 A and B may be uncertain. Based on photographs taken between 1937 and 1970, Sarah Lee Lippincott reported in 1971 that star A and B are separated by an "average" distance of 147 times the Earth-Sun distance (AU) (of a semi-major axis) in a circular orbit (e= 0.00) of about 2,600 years, in contrast to Josef Hopmann's (1890-1975) earlier report in 1958 of an elliptical orbit (e= 0.25) with an orbital period of 3,000 years and an "average" distance of 157 AU (of a semi-major axis) that varies between 118 and 196 AU.


 

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