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Asteroid Near-Earth

2025 YN5

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(2025 YN5)

Where is it now

Distance from Sun
0.878 AU
True anomaly
59.31°
Distance from Earth
0.253 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 YN5 — 0.878 AU from the Sun 2025 YN5
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2025 YN5 is 0.253 AU from Earth today (2.1 light-minutes).

In the sky

Right ascension
10h 06m 14s
Declination
-17° 14′ 38″
Constellation
Hydra
Distance from Earth
0.25 AU
Elongation from the Sun
55.94° — 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
0.969 AU
Eccentricity
0.1534
Inclination
10.09°
Orbital period
348.6 days
Perihelion
0.821 AU
Aphelion
1.118 AU
Longitude of ascending node
90.74°
Argument of periapsis
252.42°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 2.5 LD
0.0063 AU
Tisserand (Jupiter)
6.207

Orbit quality

Orbit reasonably well determined (uncertainty code 5).

Observations used
34
Data arc
5 days
First observed
21 December 2025
Last observed
26 December 2025
Residual RMS
0.5 ″
Solution · Otto Matic
4 June 2026

Visual & observation

Absolute magnitude (H)
26.69

Discovery & classification

Aten Near-Earth Object

Close approaches 43 on record

Flyby geometry
Ecliptic flyby of 2025 YN5 at 2027-07-11 13:17 UTC Top-down view of the ecliptic, Earth at the centre, for the 2027-07-11 13:17 UTC close approach of 2025 YN5. Catalogue miss distance 66.7 LD · 2.56 × 10⁷ km. The curve is the geocentric path from 2027-07-08 to 2027-07-14, 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 66.7 LD · 2.56 × 10⁷ km 2027-07-11 13:17 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2027-07-11 13:17 UTC close approach of 2025 YN5. Catalogue miss distance 66.7 LD · 2.56 × 10⁷ km. The curve is the geocentric path from 2027-07-08 to 2027-07-14, 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
2027-07-11 13:17:00 Earth 0.1714 AU 66.7 LD 6.5 km/s
2028-05-22 09:39:00 Earth 0.1202 AU 46.8 LD 8.8 km/s
2037-03-02 19:20:00 Venus 0.1242 AU 48.3 LD 3.2 km/s
2046-12-22 17:01:00 Earth 0.0613 AU 23.8 LD 6 km/s
2048-06-22 06:16:00 Earth 0.1287 AU 50.1 LD 6.4 km/s
2049-05-15 18:53:00 Earth 0.1853 AU 72.1 LD 10.7 km/s
2056-03-27 02:38:00 Venus 0.1223 AU 47.6 LD 3.3 km/s
2066-12-21 23:26:00 Earth 0.0401 AU 15.6 LD 7.9 km/s
2068-07-20 18:56:00 Earth 0.1911 AU 74.4 LD 6.6 km/s
2069-05-27 08:48:00 Earth 0.0941 AU 36.6 LD 7.9 km/s

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

Sources