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Asteroid Near-Earth

2023 SE4

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(2023 SE4)

Where is it now

Distance from Sun
0.806 AU
True anomaly
5.36°
Distance from Earth
1.409 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 2023 SE4 — 0.806 AU from the Sun 2023 SE4
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2023 SE4 is 1.409 AU from Earth today (11.7 light-minutes).

In the sky

Right ascension
11h 41m 17s
Declination
-00° 50′ 10″
Constellation
Virgo
Distance from Earth
1.41 AU
Elongation from the Sun
33.85° — 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
0.951 AU
Eccentricity
0.1532
Inclination
5.96°
Orbital period
338.6 days
Perihelion
0.805 AU
Aphelion
1.096 AU
Longitude of ascending node
182.99°
Argument of periapsis
303.35°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 2.6 LD
0.0067 AU
Tisserand (Jupiter)
6.313

Orbit quality

Orbit reasonably well determined (uncertainty code 5).

Observations used
21
Data arc
4 days
First observed
20 September 2023
Last observed
24 September 2023
Residual RMS
0.33 ″
Solution · Otto Matic
25 September 2023

Visual & observation

Absolute magnitude (H)
26.98

Discovery & classification

Aten Near-Earth Object

Close approaches 45 on record

Flyby geometry
Ecliptic flyby of 2023 SE4 at 2034-06-14 04:22 UTC Top-down view of the ecliptic, Earth at the centre, for the 2034-06-14 04:22 UTC close approach of 2023 SE4. Catalogue miss distance 184.3 LD · 7.08 × 10⁷ km. The curve is the geocentric path from 2034-06-11 to 2034-06-17, 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 184.3 LD · 7.08 × 10⁷ km 2034-06-14 04:22 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2034-06-14 04:22 UTC close approach of 2023 SE4. Catalogue miss distance 184.3 LD · 7.08 × 10⁷ km. The curve is the geocentric path from 2034-06-11 to 2034-06-17, 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
2034-06-14 04:22:00 Earth 0.4735 AU 184.3 LD 17.9 km/s
2035-05-17 16:40:00 Earth 0.0923 AU 35.9 LD 5.3 km/s
2036-01-22 17:19:00 Earth 0.1957 AU 76.2 LD 5.6 km/s
2036-09-28 22:15:00 Earth 0.1116 AU 43.4 LD 7.7 km/s
2047-06-08 10:15:00 Earth 0.3503 AU 136.3 LD 14.1 km/s
2048-04-12 07:29:00 Earth 0.1197 AU 46.6 LD 4.5 km/s
2048-07-23 01:14:00 Earth 0.1261 AU 49.1 LD 3.5 km/s
2048-12-14 22:20:00 Earth 0.1802 AU 70.1 LD 4.2 km/s
2049-09-24 02:13:00 Earth 0.2501 AU 97.3 LD 11.7 km/s
2060-05-29 08:28:00 Earth 0.194 AU 75.5 LD 9.2 km/s

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

Sources