SpaceAtlas Space Object Data
NASA JPL SBDB · 45P

Honda-Mrkos-Pajdusakova

Honda-Mrkos-Pajdusakova follows a distinctly cometary orbit: an eccentricity of 0.824 carries it from 0.533 AU at perihelion out to 5.519 AU at aphelion.

comet Observations: 1,823
Orbital Period · P
5.26 yr
v(q)
55.1 km/s
v(Q)
5.3 km/s
TJ
2.58
Eccentricity · e
0.824

Orbit and dynamics

The path is an ellipse reaching 0.533 AU from the Sun at perihelion and 5.519 AU at aphelion, a radial span of 4.986 AU.

Applying Kepler's third law to a = 3.026 AU gives an orbital period of 5.26 yr, or about 1,923 days.

The high eccentricity (0.824) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 4.25° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 55.1 km/s at perihelion and falls to 5.3 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 = 2.58, a standard discriminator between asteroidal and cometary dynamics.

Size and surface

The measured diameter is 1.6 km, a value from direct size determination rather than from brightness alone.

Observation record and orbit quality

The current orbit solution is based on 1,823 observations and has a weighted RMS residual of 0.6461 arcseconds.

Condition code U = 1 means the orbit is very well determined, leaving only a small uncertainty in the future ephemeris.

About these computed values

Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

Orbital Parameters

Semi-Major Axis
3.026 AU
Eccentricity
0.824
Perihelion
0.533 AU
Aphelion
5.519424 AU
Inclination
4.25°
Orbital Period
— yr
Epoch
2457979.5
Mean Anomaly
42.26°

Orbit diagram

The Sun sits at the focus (orange). Earth's orbit is the grey circle at 1 AU. The red dot marks the object's position at the catalog epoch.

3D orbit (interactive)

Drag to rotate; scroll or pinch to zoom. The Sun is at the focus (orange), Earth's orbit is the grey ring at 1 AU, and the red dot marks the object's current position.

Close approaches

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
1.6 km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
—

Orbit Quality

RMS
0.64613
Condition
1
Orbit ID
—
Data source: NASA JPL Small-Body Database . Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

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