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Asteroid Near-Earth

2004 YA5

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(2004 YA5)

Where is it now

Distance from Sun
1.022 AU
True anomaly
144.41°
Distance from Earth
1.051 AU
As of
16 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 — 0.997 AU from the Sun Earth 2004 YA5 — 1.022 AU from the Sun 2004 YA5
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2004 YA5 is 1.051 AU from Earth today (8.7 light-minutes).

In the sky

Right ascension
09h 47m 22s
Declination
+15° 14′ 00″
Constellation
Leo
Distance from Earth
1.05 AU
Elongation from the Sun
60.18° — 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
0.809 AU
Eccentricity
0.5364
Inclination
28.18°
Orbital period
265.7 days
Perihelion
0.375 AU
Aphelion
1.243 AU
Longitude of ascending node
269.95°
Argument of periapsis
31.22°
Epoch · J2000
2453362.5
Orbit class · ATE
Aten
Earth MOID · 20.2 LD
0.0519 AU
Tisserand (Jupiter)
7.019

Orbit quality

Orbit very uncertain — the object may be effectively lost (uncertainty code 8).

Observations used
30
Data arc
13 days
First observed
18 December 2004
Last observed
31 December 2004
Residual RMS
0.55 ″
Solution · Otto Matic
14 April 2021

Visual & observation

Absolute magnitude (H)
22.84

Discovery & classification

Aten Near-Earth Object

Sources