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Asteroid Near-Earth

2023 HM

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(2023 HM)

Where is it now

Distance from Sun
0.974 AU
True anomaly
218.04°
Distance from Earth
1.605 AU
As of
19 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 — 0.996 AU from the Sun Earth 2023 HM — 0.974 AU from the Sun 2023 HM
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2023 HM is 1.605 AU from Earth today (13.3 light-minutes).

In the sky

Right ascension
15h 56m 14s
Declination
-21° 39′ 40″
Constellation
Scorpius
Distance from Earth
1.6 AU
Elongation from the Sun
34.9° — near the Sun — look low at dusk or dawn

Favours the southern hemisphere; low or below the horizon from far north.

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
0.834 AU
Eccentricity
0.6698
Inclination
2.22°
Orbital period
278.3 days
Perihelion
0.275 AU
Aphelion
1.393 AU
Longitude of ascending node
30.62°
Argument of periapsis
28.58°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 2.0 LD
0.005 AU
Tisserand (Jupiter)
6.832

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
18
Data arc
2 days
First observed
16 April 2023
Last observed
18 April 2023
Residual RMS
0.55 ″
Solution · Otto Matic
17 April 2023

Visual & observation

Absolute magnitude (H)
27.82

Discovery & classification

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

Aten Near-Earth Object

Close approaches 69 on record

Flyby geometry
Ecliptic flyby of 2023 HM at 2027-06-14 11:33 UTC Top-down view of the ecliptic, Earth at the centre, for the 2027-06-14 11:33 UTC close approach of 2023 HM. Catalogue miss distance 113.3 LD · 4.35 × 10⁷ km. The curve is the geocentric path from 2027-06-11 to 2027-06-17, 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 113.3 LD · 4.35 × 10⁷ km 2027-06-14 11:33 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2027-06-14 11:33 UTC close approach of 2023 HM. Catalogue miss distance 113.3 LD · 4.35 × 10⁷ km. The curve is the geocentric path from 2027-06-11 to 2027-06-17, 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
2027-06-14 11:33:00 Earth 0.2911 AU 113.3 LD 14.5 km/s
2030-01-02 00:51:00 Merc 0.0266 AU 10.4 LD 20.6 km/s
2030-01-02 00:51:00 Mercury 0.0266 AU 10.4 LD 20.6 km/s
2030-05-26 13:06:00 Earth 0.3765 AU 146.5 LD 14.9 km/s
2032-03-09 02:18:00 Venus 0.0056 AU 2.2 LD 25.4 km/s
2062-04-22 22:20:00 Earth 0.2686 AU 104.5 LD 14.5 km/s

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

Sources