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Asteroid Near-Earth

2025 HE3

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(2025 HE3)

Where is it now

Distance from Sun
0.826 AU
True anomaly
334.71°
Distance from Earth
0.514 AU
As of
22 October 2026

Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.

Sun Earth — 0.995 AU from the Sun Earth 2025 HE3 — 0.826 AU from the Sun 2025 HE3
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2025 HE3 is 0.514 AU from Earth today (4.3 light-minutes).

In the sky

Right ascension
10h 16m 51s
Declination
+06° 24′ 45″
Constellation
Leo
Distance from Earth
0.52 AU
Elongation from the Sun
56.01° — near the Sun — look low at dusk or dawn

Visible from both hemispheres.

From your location

See how high it is right now, whether it is up after civil twilight, and when it rises and sets where you are.

How do I find my coordinates?

Google Maps on a computer

  1. Right-click the spot where you'll be observing.
  2. The first line of the menu is the coordinates, e.g. 51.50722, -0.12758 — click it and they're copied.
  3. Paste them above.

Google Maps on a phone

  1. Press and hold the spot to drop a pin.
  2. The coordinates appear in the search bar (or on the pin's card) — tap to copy, then paste above.

A full Google Maps link works too, but the short maps.app.goo.gl share links don't carry coordinates — copy the numbers instead. We round to about a kilometre; that's all the sky calculation needs.

Know your what3words address? Paste it, e.g. ///filled.count.soap. This is optional — the three words are sent to what3words to convert them, and we don't store the address or the result.

Your location stays in your browser and is sent only for this calculation. Using a what3words address is optional; if you do, the three words go to what3words to be converted and we don't record them. Set a location first, then you can save an email alert for this object. See our privacy policy.

Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.

Orbital elements

Semi-major axis
0.945 AU
Eccentricity
0.1359
Inclination
5.11°
Orbital period
335.7 days
Perihelion
0.817 AU
Aphelion
1.074 AU
Longitude of ascending node
211.72°
Argument of periapsis
233.95°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 0.9 LD
0.0023 AU
Tisserand (Jupiter)
6.346

Orbit quality

Orbit reasonably well determined (uncertainty code 5).

Observations used
57
Data arc
8 days
First observed
24 April 2025
Last observed
2 May 2025
Residual RMS
0.5 ″
Solution · Otto Matic
10 May 2025

Visual & observation

Absolute magnitude (H)
28.22

Discovery & classification

Aten Near-Earth Object

Close approaches 49 on record

Flyby geometry
Ecliptic flyby of 2025 HE3 at 2036-04-21 05:40 UTC Top-down view of the ecliptic, Earth at the centre, for the 2036-04-21 05:40 UTC close approach of 2025 HE3. Catalogue miss distance 55.1 LD · 2.12 × 10⁷ km. The curve is the geocentric path from 2036-04-18 to 2036-04-24, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 55.1 LD · 2.12 × 10⁷ km 2036-04-21 05:40 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2036-04-21 05:40 UTC close approach of 2025 HE3. Catalogue miss distance 55.1 LD · 2.12 × 10⁷ km. The curve is the geocentric path from 2036-04-18 to 2036-04-24, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate.

JPL Horizons

When (UTC) Body Distance Lunar distances Relative speed
2036-04-21 05:40:00 Earth 0.1416 AU 55.1 LD 7.9 km/s
2036-12-13 01:16:00 Earth 0.1779 AU 69.2 LD 5.2 km/s
2037-08-14 09:28:00 Earth 0.1582 AU 61.6 LD 7.4 km/s
2048-01-21 20:47:00 Earth 0.1714 AU 66.7 LD 4.2 km/s
2048-08-27 09:08:00 Earth 0.0821 AU 31.9 LD 3.8 km/s
2059-06-06 07:29:00 Earth 0.0927 AU 36.1 LD 3.2 km/s
2059-09-28 18:17:00 Earth 0.1097 AU 42.7 LD 3.8 km/s
2070-04-27 05:20:00 Earth 0.0403 AU 15.7 LD 3.4 km/s
2070-10-22 09:18:00 Earth 0.1402 AU 54.6 LD 4.6 km/s
2073-08-07 14:09:00 Venus 0.1224 AU 47.6 LD 4.8 km/s

Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.

Sources