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Asteroid Near-Earth

2023 YU1

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(2023 YU1)

Where is it now

Distance from Sun
0.906 AU
True anomaly
131.01°
Distance from Earth
0.326 AU
As of
20 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 YU1 — 0.906 AU from the Sun 2023 YU1
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2023 YU1 is 0.326 AU from Earth today (2.7 light-minutes).

In the sky

Right ascension
16h 47m 57s
Declination
+38° 21′ 57″
Constellation
Hercules
Distance from Earth
0.33 AU
Elongation from the Sun
65.33° — well clear of the Sun

Favours the northern hemisphere; low or below the horizon from far south.

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
0.88 AU
Eccentricity
0.6278
Inclination
20.42°
Orbital period
301.4 days
Perihelion
0.327 AU
Aphelion
1.432 AU
Longitude of ascending node
320.15°
Argument of periapsis
291.79°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 51.3 LD
0.1318 AU
Tisserand (Jupiter)
6.515

Orbit quality

Orbit very well determined (uncertainty code 2).

Observations used
23
Data arc
4.96 years
First observed
24 January 2019
Last observed
11 January 2024
Residual RMS
0.56 ″
Solution · Otto Matic
27 July 2026

Visual & observation

Absolute magnitude (H)
21.33

Discovery & classification

Aten Near-Earth Object

Close approaches 103 on record

Flyby geometry
Ecliptic flyby of 2023 YU1 at 2043-01-18 01:27 UTC Top-down view of the ecliptic, Earth at the centre, for the 2043-01-18 01:27 UTC close approach of 2023 YU1. Catalogue miss distance 60.1 LD · 2.31 × 10⁷ km. The curve is the geocentric path from 2043-01-15 to 2043-01-21, 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 60.1 LD · 2.31 × 10⁷ km 2043-01-18 01:27 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2043-01-18 01:27 UTC close approach of 2023 YU1. Catalogue miss distance 60.1 LD · 2.31 × 10⁷ km. The curve is the geocentric path from 2043-01-15 to 2043-01-21, 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
2028-03-23 22:51:00 Venus 0.0546 AU 21.2 LD 24.7 km/s
2033-04-19 19:51:00 Mercury 0.0791 AU 30.8 LD 43.8 km/s
2033-04-19 19:51:00 Merc 0.0791 AU 30.8 LD 43.8 km/s
2039-01-29 07:16:00 Merc 0.0598 AU 23.3 LD 41.5 km/s
2039-01-29 07:16:00 Mercury 0.0598 AU 23.3 LD 41.5 km/s
2043-01-18 01:27:00 Earth 0.1545 AU 60.1 LD 24.4 km/s
2044-11-08 22:34:00 Mercury 0.0469 AU 18.3 LD 39.8 km/s
2044-11-08 22:34:00 Merc 0.0469 AU 18.3 LD 39.8 km/s
2050-08-20 11:11:00 Mercury 0.0364 AU 14.2 LD 38 km/s
2050-08-20 11:11:00 Merc 0.0364 AU 14.2 LD 38 km/s

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

Sources