Mrkos

Orbit and dynamics

Between its closest point (0.534 AU) and its farthest (98.545 AU), the heliocentric distance changes by 98.011 AU over every revolution.

One full revolution takes 349 yr (127,357 days), computed from the semi-major axis of 49.54 AU.

The high eccentricity (0.989) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 86.5° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 57.5 km/s at perihelion and falls to 0.3 km/s at aphelion.

Because q < 1 AU and Q > 1 AU, this orbit geometrically intersects the region of Earth's orbit.

Its Tisserand parameter with respect to Jupiter is T_J = 0.16, a standard discriminator between asteroidal and cometary dynamics.

Size and surface

Neither a measured diameter nor a reliable absolute magnitude is available for Mrkos, so its physical size remains unconstrained.

Observation record and orbit quality

Astrometry from 21 individual observations underpins this orbit; the fit leaves an RMS residual of 0.7632 arcseconds.

Condition code U = 6 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.