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Asteroid Near-Earth

2023 MH4

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(2023 MH4)

Where is it now

Distance from Sun
0.928 AU
True anomaly
132.24°
Distance from Earth
1.9 AU
As of
16 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 — 0.997 AU from the Sun Earth 2023 MH4 — 0.928 AU from the Sun 2023 MH4
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2023 MH4 is 1.9 AU from Earth today (15.8 light-minutes).

In the sky

Right ascension
12h 58m 57s
Declination
-14° 13′ 23″
Constellation
Virgo
Distance from Earth
1.9 AU
Elongation from the Sun
8.84° — too close to the Sun to observe

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
0.809 AU
Eccentricity
0.4276
Inclination
15.3°
Orbital period
265.7 days
Perihelion
0.463 AU
Aphelion
1.155 AU
Longitude of ascending node
273.63°
Argument of periapsis
146.72°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 2.7 LD
0.0069 AU
Tisserand (Jupiter)
7.121

Orbit quality

Orbit poorly determined (uncertainty code 6).

Observations used
38
Data arc
4 days
First observed
24 June 2023
Last observed
28 June 2023
Residual RMS
0.47 ″
Solution · Otto Matic
29 June 2023

Visual & observation

Absolute magnitude (H)
26.83

Discovery & classification

Aten Near-Earth Object

Close approaches 118 on record

Flyby geometry
Ecliptic flyby of 2023 MH4 at 2028-04-24 00:26 UTC Top-down view of the ecliptic, Earth at the centre, for the 2028-04-24 00:26 UTC close approach of 2023 MH4. Catalogue miss distance 96.3 LD · 3.7 × 10⁷ km. The curve is the geocentric path from 2028-04-21 to 2028-04-27, 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 27 Apr 96.3 LD · 3.7 × 10⁷ km 2028-04-24 00:26 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2028-04-24 00:26 UTC close approach of 2023 MH4. Catalogue miss distance 96.3 LD · 3.7 × 10⁷ km. The curve is the geocentric path from 2028-04-21 to 2028-04-27, 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
2028-04-24 00:26:00 Earth 0.2474 AU 96.3 LD 10.5 km/s
2028-09-25 17:09:00 Earth 0.4991 AU 194.2 LD 15.1 km/s
2031-01-11 02:23:00 Earth 0.4634 AU 180.3 LD 19.3 km/s
2031-06-26 21:53:00 Earth 0.0113 AU 4.4 LD 12.5 km/s
2034-06-13 20:21:00 Earth 0.4628 AU 180.1 LD 26.4 km/s
2036-04-16 20:46:00 Earth 0.253 AU 98.5 LD 11.6 km/s
2039-01-21 01:33:00 Earth 0.4411 AU 171.6 LD 17.2 km/s
2039-06-22 23:16:00 Earth 0.091 AU 35.4 LD 10.9 km/s
2042-06-17 20:21:00 Earth 0.3669 AU 142.8 LD 23.3 km/s
2044-04-15 11:08:00 Earth 0.2855 AU 111.1 LD 14.7 km/s

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

Sources