SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 HT6

2020 HT6

2020 HT6 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.275 AU once every 1.44 yr.

Amor Observations: 36
Orbital Period · P
1.44 yr
v(q)
31.5 km/s
v(Q)
22.1 km/s
Diameter · ≈
0.04 km
TJ
5.05
Eccentricity · e
0.1766

Orbit and dynamics

The path is an ellipse reaching 1.05 AU from the Sun at perihelion and 1.5 AU at aphelion, a radial span of 0.45 AU.

Applying Kepler's third law to a = 1.275 AU gives an orbital period of 1.44 yr, or about 526 days.

An eccentricity of 0.177 makes the orbit moderately elongated.

Its inclination of 4.71° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 31.5 km/s at perihelion and falls to 22.1 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 24.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

The current orbit solution is based on 36 observations and has a weighted RMS residual of 0.4166 arcseconds.

Condition code U = 5 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
1.275 AU
Eccentricity
0.1766
Perihelion
1.05 AU
Aphelion
1.500165 AU
Inclination
4.71°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
81.05°

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

Predicted close approaches to Earth, from NASA's Center for Near-Earth Object Studies (CNEOS).

Date (UTC)Miss distanceVelocity
2030-Jan-27 08:22 0.343365 AU
51366747 km
5.57 km/s
2030-Jul-01 08:51 0.436167 AU
65249641 km
14.94 km/s
2033-Apr-15 03:28 0.307582 AU
46013600 km
10.41 km/s
2033-Aug-10 08:40 0.280663 AU
41986546 km
3.59 km/s
2039-Dec-18 06:34 0.471812 AU
70582032 km
7.72 km/s
2043-Jun-17 10:30 0.147548 AU
22072856 km
6.93 km/s
2046-Sep-15 15:20 0.400744 AU
59950385 km
5.82 km/s
2053-Jan-05 21:13 0.416030 AU
62237259 km
6.89 km/s
2056-May-25 09:44 0.091078 AU
13625054 km
2.88 km/s
2059-Oct-08 21:09 0.466705 AU
69818013 km
7.06 km/s
2066-Feb-05 22:59 0.307284 AU
45969000 km
4.87 km/s
2066-Jun-27 21:40 0.351804 AU
52629172 km
12.72 km/s
2069-Apr-10 15:23 0.390806 AU
58463819 km
13.00 km/s
2069-Aug-24 10:05 0.325324 AU
48667841 km
4.43 km/s
2075-Dec-26 09:21 0.452657 AU
67716584 km
7.42 km/s
2079-Jun-11 08:44 0.074880 AU
11201857 km
4.09 km/s

Distances in astronomical units (AU) and kilometres. Source: NASA/JPL CNEOS Close Approach Data API.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
24.7

Orbit Quality

RMS
0.41662
Condition
5
Orbit ID
—
Data source: NASA JPL Small-Body Database · NASA CNEOS. 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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