Skip to content
Public Universe
Asteroid Near-Earth

2025 SU4

Add to an observing list or journal →

(2025 SU4)

Where is it now

Distance from Sun
0.805 AU
True anomaly
301.27°
Distance from Earth
0.404 AU
As of
24 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 — 0.994 AU from the Sun Earth 2025 SU4 — 0.805 AU from the Sun 2025 SU4
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2025 SU4 is 0.404 AU from Earth today (3.4 light-minutes).

In the sky

Right ascension
10h 51m 53s
Declination
+10° 03′ 08″
Constellation
Leo
Distance from Earth
0.4 AU
Elongation from the Sun
51.03° — 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
0.97 AU
Eccentricity
0.2509
Inclination
1.64°
Orbital period
349.2 days
Perihelion
0.727 AU
Aphelion
1.214 AU
Longitude of ascending node
1.43°
Argument of periapsis
111.58°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 0.1 LD
0.0002 AU
Tisserand (Jupiter)
6.197

Orbit quality

Orbit reasonably well determined (uncertainty code 5).

Observations used
30
Data arc
24 hours
First observed
23 September 2025
Last observed
24 September 2025
Residual RMS
0.35 ″
Solution · Otto Matic
25 September 2025

Visual & observation

Absolute magnitude (H)
31.83

Discovery & classification

Listed by JPL impact monitoring; see the Sentry table for current probabilities.

Aten Near-Earth Object

Close approaches 35 on record

Flyby geometry
Ecliptic flyby of 2025 SU4 at 2044-05-06 16:08 UTC Top-down view of the ecliptic, Earth at the centre, for the 2044-05-06 16:08 UTC close approach of 2025 SU4. Catalogue miss distance 12.1 LD · 4.66 × 10⁶ km. The curve is the geocentric path from 2044-05-03 to 2044-05-09, 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. At closest approach the object is south of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 4 May 9 May 12.1 LD · 4.66 × 10⁶ km 2044-05-06 16:08 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2044-05-06 16:08 UTC close approach of 2025 SU4. Catalogue miss distance 12.1 LD · 4.66 × 10⁶ km. The curve is the geocentric path from 2044-05-03 to 2044-05-09, 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. At closest approach the object is south of the ecliptic. 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
2028-11-12 09:21:00 Venus 0.1452 AU 56.5 LD 11.1 km/s
2037-06-20 20:40:00 Venus 0.1015 AU 39.5 LD 8.9 km/s
2044-05-06 16:08:00 Earth 0.0311 AU 12.1 LD 7.7 km/s
2045-06-16 19:58:00 Earth 0.1761 AU 68.5 LD 5.4 km/s
2046-02-01 06:18:00 Venus 0.1242 AU 48.3 LD 10 km/s
2046-08-02 17:56:00 Earth 0.1932 AU 75.2 LD 5.8 km/s
2047-09-25 10:31:00 Earth 0.0447 AU 17.4 LD 5.7 km/s
2048-09-17 23:25:00 Earth 0.1977 AU 77.0 LD 12.9 km/s
2068-02-09 04:03:00 Venus 0.1158 AU 45.1 LD 9.8 km/s
2068-05-12 14:46:00 Earth 0.1939 AU 75.5 LD 12.8 km/s

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

Sources