SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 HR3

2020 HR3

2020 HR3 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.09 AU it takes 1.14 yr to circle the Sun.

Apollo Observations: 45
Orbital Period · P
1.14 yr
v(q)
40.7 km/s
v(Q)
20 km/s
Diameter · ≈
0.06 km
TJ
5.63
Eccentricity · e
0.3411

Orbit and dynamics

Between its closest point (0.718 AU) and its farthest (1.462 AU), the heliocentric distance changes by 0.744 AU over every revolution.

One full revolution takes 1.14 yr (416 days), computed from the semi-major axis of 1.09 AU.

An eccentricity of 0.341 makes the orbit moderately elongated.

The orbital plane is tilted 8.29° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 40.7 km/s at perihelion and falls to 20 km/s at aphelion.

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

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 24.04 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.06 km.

Observation record and orbit quality

Astrometry from 45 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4513 arcseconds.

Condition code U = 3 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
1.09 AU
Eccentricity
0.3411
Perihelion
0.718 AU
Aphelion
1.461799 AU
Inclination
8.29°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
59.68°

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
2028-May-05 05:51 0.089094 AU
13328240 km
13.96 km/s
2029-Mar-04 18:42 0.481963 AU
72100579 km
9.87 km/s
2029-Sep-18 05:36 0.286353 AU
42837760 km
10.28 km/s
2029-Dec-21 11:02 0.348852 AU
52187507 km
7.62 km/s
2030-Dec-14 08:33 0.487396 AU
72913407 km
25.96 km/s
2036-Apr-24 14:41 0.331522 AU
49594990 km
21.03 km/s
2037-Mar-25 22:55 0.412111 AU
61650965 km
8.88 km/s
2037-Aug-09 10:33 0.317873 AU
47553193 km
11.17 km/s
2038-Jan-16 22:41 0.453795 AU
67886728 km
9.38 km/s
2038-Dec-03 10:45 0.247124 AU
36969288 km
18.65 km/s
2045-Apr-27 09:49 0.271846 AU
40667531 km
6.69 km/s
2045-Jun-25 22:13 0.255340 AU
38198291 km
8.29 km/s
2046-Feb-05 12:01 0.497776 AU
74466240 km
10.08 km/s
2046-Nov-21 15:48 0.031606 AU
4728120 km
11.51 km/s
2053-May-11 04:49 0.036698 AU
5490014 km
10.47 km/s
2054-Oct-17 13:08 0.218533 AU
32692037 km
8.11 km/s
2061-May-03 08:50 0.139990 AU
20942164 km
15.41 km/s
2062-Mar-08 13:46 0.474647 AU
71006108 km
9.79 km/s
2062-Sep-11 12:32 0.297697 AU
44534775 km
10.69 km/s
2062-Dec-27 03:28 0.372146 AU
55672231 km
8.05 km/s
2063-Dec-13 06:18 0.457697 AU
68470459 km
25.05 km/s
2069-Apr-25 03:58 0.326015 AU
48771101 km
20.88 km/s
2070-Mar-25 10:42 0.415738 AU
62193543 km
8.93 km/s
2070-Aug-11 11:49 0.317918 AU
47559891 km
11.21 km/s
2071-Jan-16 06:14 0.450482 AU
67391132 km
9.33 km/s
2071-Dec-04 10:29 0.262280 AU
39236458 km
19.12 km/s
2078-Apr-19 03:26 0.305265 AU
45667044 km
7.27 km/s
2078-Jul-06 15:28 0.275928 AU
41278284 km
9.15 km/s
2079-Feb-02 02:15 0.493075 AU
73763006 km
10.01 km/s
2079-Nov-24 16:46 0.061305 AU
9171036 km
13.04 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
24.04

Orbit Quality

RMS
0.4513
Condition
3
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.

Keep exploring

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