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Public Universe
Asteroid Near-Earth

2025 HD

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(2025 HD)

Where is it now

Distance from Sun
0.828 AU
True anomaly
298.44°
Distance from Earth
0.18 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 HD — 0.828 AU from the Sun 2025 HD
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2025 HD is 0.18 AU from Earth today (1.5 light-minutes).

In the sky

Right ascension
14h 54m 38s
Declination
-22° 22′ 29″
Constellation
Libra
Distance from Earth
0.18 AU
Elongation from the Sun
18.57° — too close to the Sun to observe

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
0.957 AU
Eccentricity
0.2148
Inclination
6.89°
Orbital period
342 days
Perihelion
0.752 AU
Aphelion
1.163 AU
Longitude of ascending node
36.11°
Argument of periapsis
50.67°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 10.4 LD
0.0268 AU
Tisserand (Jupiter)
6.268

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
84
Data arc
16 days
First observed
18 April 2025
Last observed
4 May 2025
Residual RMS
0.56 ″
Solution · Otto Matic
26 August 2026

Visual & observation

Absolute magnitude (H)
25.35

Discovery & classification

Aten Near-Earth Object

Close approaches 65 on record

Flyby geometry
Ecliptic flyby of 2025 HD at 2040-04-15 17:51 UTC Top-down view of the ecliptic, Earth at the centre, for the 2040-04-15 17:51 UTC close approach of 2025 HD. Catalogue miss distance 12.7 LD · 4.9 × 10⁶ km. The curve is the geocentric path from 2040-04-12 to 2040-04-18, 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 north of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 12.7 LD · 4.9 × 10⁶ km 2040-04-15 17:51 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2040-04-15 17:51 UTC close approach of 2025 HD. Catalogue miss distance 12.7 LD · 4.9 × 10⁶ km. The curve is the geocentric path from 2040-04-12 to 2040-04-18, 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 north 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
2026-10-16 00:57:00 Earth 0.1716 AU 66.8 LD 6.2 km/s
2026-12-03 11:03:00 Venus 0.0823 AU 32.0 LD 3.9 km/s
2040-04-15 17:51:00 Earth 0.0327 AU 12.7 LD 6.2 km/s
2041-07-17 14:02:00 Earth 0.1751 AU 68.1 LD 4.5 km/s
2041-10-09 07:11:00 Earth 0.1608 AU 62.6 LD 5.9 km/s
2046-07-22 12:16:00 Venus 0.0664 AU 25.9 LD 4 km/s
2055-05-07 07:45:00 Earth 0.1212 AU 47.2 LD 5.2 km/s
2056-09-06 15:42:00 Earth 0.1075 AU 41.8 LD 5.9 km/s
2068-01-31 07:05:00 Venus 0.073 AU 28.4 LD 4.9 km/s
2069-04-15 16:54:00 Earth 0.0955 AU 37.2 LD 9.1 km/s

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

Sources