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Asteroid Near-Earth

2025 YC3

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(2025 YC3)

Where is it now

Distance from Sun
0.96 AU
True anomaly
217.94°
Distance from Earth
1.171 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 2025 YC3 — 0.96 AU from the Sun 2025 YC3
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2025 YC3 is 1.171 AU from Earth today (9.7 light-minutes).

In the sky

Right ascension
10h 23m 17s
Declination
+06° 22′ 51″
Constellation
Leo
Distance from Earth
1.17 AU
Elongation from the Sun
51.79° — 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
0.854 AU
Eccentricity
0.1739
Inclination
23.61°
Orbital period
288.3 days
Perihelion
0.706 AU
Aphelion
1.003 AU
Longitude of ascending node
270.78°
Argument of periapsis
331.98°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 2.1 LD
0.0053 AU
Tisserand (Jupiter)
6.823

Orbit quality

Orbit reasonably well determined (uncertainty code 5).

Observations used
36
Data arc
8 days
First observed
19 December 2025
Last observed
27 December 2025
Residual RMS
0.5 ″
Solution · Otto Matic
5 April 2026

Visual & observation

Absolute magnitude (H)
23.06

Discovery & classification

Aten Near-Earth Object

Close approaches 41 on record

Flyby geometry
Ecliptic flyby of 2025 YC3 at 2040-12-22 09:17 UTC Top-down view of the ecliptic, Earth at the centre, for the 2040-12-22 09:17 UTC close approach of 2025 YC3. Catalogue miss distance 2.06 LD · 790,065 km. The curve is the geocentric path from 2040-12-19 to 2040-12-25, 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 20 Dec 24 Dec 2.06 LD · 790,065 km 2040-12-22 09:17 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2040-12-22 09:17 UTC close approach of 2025 YC3. Catalogue miss distance 2.06 LD · 790,065 km. The curve is the geocentric path from 2040-12-19 to 2040-12-25, 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
2030-04-12 09:32:00 Venus 0.1197 AU 46.6 LD 17.5 km/s
2040-12-22 05:52:00 Moon 0.0072 AU 2.8 LD 12.6 km/s
2040-12-22 09:17:00 Earth 0.0053 AU 2.1 LD 12.4 km/s
2055-12-22 10:59:00 Earth 0.0944 AU 36.8 LD 13.4 km/s
2066-12-22 09:35:00 Earth 0.1537 AU 59.8 LD 12.4 km/s
2070-12-20 21:34:00 Earth 0.1784 AU 69.4 LD 14.8 km/s
2081-12-22 19:51:00 Earth 0.0574 AU 22.3 LD 12.2 km/s
2096-12-22 14:17:00 Earth 0.0223 AU 8.7 LD 12.3 km/s
2097-05-02 05:48:00 Venus 0.1296 AU 50.4 LD 17.6 km/s
2126-12-23 22:07:00 Earth 0.1278 AU 49.7 LD 12.3 km/s

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

Sources